./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/email_spec0_product33.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_2e767ed3-c0af-4a77-8651-e58c0bc0eff2/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e767ed3-c0af-4a77-8651-e58c0bc0eff2/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_2e767ed3-c0af-4a77-8651-e58c0bc0eff2/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e767ed3-c0af-4a77-8651-e58c0bc0eff2/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec0_product33.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e767ed3-c0af-4a77-8651-e58c0bc0eff2/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_2e767ed3-c0af-4a77-8651-e58c0bc0eff2/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 6a2f1102c08ad072b808cfc472937f1cd1560bb61fc22de7fb77e42f10991bfd --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:39:41,713 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:39:41,715 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:39:41,756 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:39:41,757 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:39:41,761 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:39:41,765 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:39:41,770 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:39:41,772 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:39:41,779 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:39:41,780 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:39:41,783 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:39:41,783 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:39:41,788 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:39:41,791 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:39:41,793 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:39:41,794 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:39:41,795 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:39:41,797 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:39:41,800 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:39:41,806 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:39:41,812 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:39:41,813 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:39:41,815 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:39:41,820 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:39:41,830 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:39:41,830 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:39:41,832 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:39:41,832 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:39:41,834 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:39:41,836 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:39:41,838 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:39:41,839 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:39:41,841 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:39:41,842 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:39:41,843 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:39:41,845 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:39:41,845 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:39:41,845 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:39:41,846 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:39:41,847 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:39:41,848 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e767ed3-c0af-4a77-8651-e58c0bc0eff2/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 01:39:41,894 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:39:41,894 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:39:41,896 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:39:41,896 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:39:41,896 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:39:41,897 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:39:41,897 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:39:41,897 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:39:41,897 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:39:41,898 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:39:41,899 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:39:41,899 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:39:41,899 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:39:41,900 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:39:41,900 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:39:41,901 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:39:41,901 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:39:41,901 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:39:41,901 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:39:41,902 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:39:41,902 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:39:41,902 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:39:41,902 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:39:41,903 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:39:41,903 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:39:41,903 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:39:41,903 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:39:41,904 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:39:41,904 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:39:41,906 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:39:41,906 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:39:41,906 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:39:41,907 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:39:41,907 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:39:41,907 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:39:41,907 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:39:41,908 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:39:41,908 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:39:41,908 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:39:41,908 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_2e767ed3-c0af-4a77-8651-e58c0bc0eff2/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e767ed3-c0af-4a77-8651-e58c0bc0eff2/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6a2f1102c08ad072b808cfc472937f1cd1560bb61fc22de7fb77e42f10991bfd [2021-11-07 01:39:42,211 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:39:42,237 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:39:42,240 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:39:42,241 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:39:42,242 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:39:42,243 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e767ed3-c0af-4a77-8651-e58c0bc0eff2/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec0_product33.cil.c [2021-11-07 01:39:42,330 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e767ed3-c0af-4a77-8651-e58c0bc0eff2/bin/utaipan-UUZaoUuFF8/data/445dd95af/833a90bf0426489ebf960eb4ae584d57/FLAG440c8589c [2021-11-07 01:39:43,086 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:39:43,086 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e767ed3-c0af-4a77-8651-e58c0bc0eff2/sv-benchmarks/c/product-lines/email_spec0_product33.cil.c [2021-11-07 01:39:43,114 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e767ed3-c0af-4a77-8651-e58c0bc0eff2/bin/utaipan-UUZaoUuFF8/data/445dd95af/833a90bf0426489ebf960eb4ae584d57/FLAG440c8589c [2021-11-07 01:39:43,263 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e767ed3-c0af-4a77-8651-e58c0bc0eff2/bin/utaipan-UUZaoUuFF8/data/445dd95af/833a90bf0426489ebf960eb4ae584d57 [2021-11-07 01:39:43,267 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:39:43,269 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:39:43,271 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:39:43,271 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:39:43,275 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:39:43,289 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:39:43" (1/1) ... [2021-11-07 01:39:43,290 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1475703e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:39:43, skipping insertion in model container [2021-11-07 01:39:43,290 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:39:43" (1/1) ... [2021-11-07 01:39:43,298 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:39:43,386 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:39:43,824 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_2e767ed3-c0af-4a77-8651-e58c0bc0eff2/sv-benchmarks/c/product-lines/email_spec0_product33.cil.c[31228,31241] [2021-11-07 01:39:44,104 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:39:44,119 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 01:39:44,120 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@742d0b3f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:39:44, skipping insertion in model container [2021-11-07 01:39:44,120 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:39:44,120 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 01:39:44,123 INFO L168 Benchmark]: Toolchain (without parser) took 852.49 ms. Allocated memory is still 102.8 MB. Free memory was 60.1 MB in the beginning and 64.4 MB in the end (delta: -4.3 MB). Peak memory consumption was 7.2 MB. Max. memory is 16.1 GB. [2021-11-07 01:39:44,124 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 102.8 MB. Free memory is still 78.9 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:39:44,125 INFO L168 Benchmark]: CACSL2BoogieTranslator took 849.30 ms. Allocated memory is still 102.8 MB. Free memory was 59.9 MB in the beginning and 64.4 MB in the end (delta: -4.5 MB). Peak memory consumption was 7.2 MB. Max. memory is 16.1 GB. [2021-11-07 01:39:44,127 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 102.8 MB. Free memory is still 78.9 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 849.30 ms. Allocated memory is still 102.8 MB. Free memory was 59.9 MB in the beginning and 64.4 MB in the end (delta: -4.5 MB). Peak memory consumption was 7.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 2194]: 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_2e767ed3-c0af-4a77-8651-e58c0bc0eff2/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e767ed3-c0af-4a77-8651-e58c0bc0eff2/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_2e767ed3-c0af-4a77-8651-e58c0bc0eff2/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e767ed3-c0af-4a77-8651-e58c0bc0eff2/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec0_product33.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e767ed3-c0af-4a77-8651-e58c0bc0eff2/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_2e767ed3-c0af-4a77-8651-e58c0bc0eff2/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 6a2f1102c08ad072b808cfc472937f1cd1560bb61fc22de7fb77e42f10991bfd --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:39:46,877 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:39:46,881 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:39:46,965 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:39:46,966 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:39:46,970 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:39:46,973 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:39:46,978 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:39:46,982 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:39:46,991 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:39:46,993 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:39:46,995 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:39:46,996 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:39:46,999 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:39:47,002 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:39:47,007 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:39:47,009 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:39:47,010 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:39:47,012 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:39:47,021 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:39:47,024 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:39:47,026 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:39:47,029 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:39:47,031 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:39:47,043 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:39:47,043 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:39:47,044 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:39:47,046 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:39:47,047 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:39:47,048 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:39:47,049 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:39:47,050 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:39:47,053 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:39:47,054 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:39:47,056 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:39:47,056 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:39:47,057 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:39:47,058 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:39:47,058 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:39:47,060 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:39:47,061 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:39:47,067 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e767ed3-c0af-4a77-8651-e58c0bc0eff2/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-07 01:39:47,117 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:39:47,118 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:39:47,119 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:39:47,120 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:39:47,120 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:39:47,120 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:39:47,121 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:39:47,121 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:39:47,122 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:39:47,123 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:39:47,125 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:39:47,125 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:39:47,125 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:39:47,126 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:39:47,126 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:39:47,126 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:39:47,127 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:39:47,127 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 01:39:47,127 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 01:39:47,128 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:39:47,128 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:39:47,128 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:39:47,129 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:39:47,129 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:39:47,130 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 01:39:47,130 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:39:47,130 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:39:47,131 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:39:47,131 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:39:47,131 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:39:47,132 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 01:39:47,132 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 01:39:47,132 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:39:47,133 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:39:47,133 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:39:47,134 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_2e767ed3-c0af-4a77-8651-e58c0bc0eff2/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e767ed3-c0af-4a77-8651-e58c0bc0eff2/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6a2f1102c08ad072b808cfc472937f1cd1560bb61fc22de7fb77e42f10991bfd [2021-11-07 01:39:47,593 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:39:47,622 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:39:47,625 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:39:47,627 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:39:47,628 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:39:47,629 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e767ed3-c0af-4a77-8651-e58c0bc0eff2/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec0_product33.cil.c [2021-11-07 01:39:47,708 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e767ed3-c0af-4a77-8651-e58c0bc0eff2/bin/utaipan-UUZaoUuFF8/data/70f58a58d/f1942e5e908746358ae82e957888e908/FLAGe5a877f29 [2021-11-07 01:39:48,467 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:39:48,468 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e767ed3-c0af-4a77-8651-e58c0bc0eff2/sv-benchmarks/c/product-lines/email_spec0_product33.cil.c [2021-11-07 01:39:48,511 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e767ed3-c0af-4a77-8651-e58c0bc0eff2/bin/utaipan-UUZaoUuFF8/data/70f58a58d/f1942e5e908746358ae82e957888e908/FLAGe5a877f29 [2021-11-07 01:39:48,684 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e767ed3-c0af-4a77-8651-e58c0bc0eff2/bin/utaipan-UUZaoUuFF8/data/70f58a58d/f1942e5e908746358ae82e957888e908 [2021-11-07 01:39:48,687 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:39:48,689 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:39:48,690 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:39:48,691 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:39:48,704 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:39:48,705 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:39:48" (1/1) ... [2021-11-07 01:39:48,706 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ccba6bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:39:48, skipping insertion in model container [2021-11-07 01:39:48,707 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:39:48" (1/1) ... [2021-11-07 01:39:48,717 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:39:48,818 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:39:49,368 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_2e767ed3-c0af-4a77-8651-e58c0bc0eff2/sv-benchmarks/c/product-lines/email_spec0_product33.cil.c[31228,31241] [2021-11-07 01:39:49,693 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:39:49,717 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 01:39:49,737 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:39:49,825 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_2e767ed3-c0af-4a77-8651-e58c0bc0eff2/sv-benchmarks/c/product-lines/email_spec0_product33.cil.c[31228,31241] [2021-11-07 01:39:49,902 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:39:49,910 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:39:49,960 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_2e767ed3-c0af-4a77-8651-e58c0bc0eff2/sv-benchmarks/c/product-lines/email_spec0_product33.cil.c[31228,31241] [2021-11-07 01:39:50,049 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:39:50,115 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:39:50,116 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:39:50 WrapperNode [2021-11-07 01:39:50,116 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:39:50,117 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:39:50,117 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:39:50,117 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:39:50,125 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:39:50" (1/1) ... [2021-11-07 01:39:50,206 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:39:50" (1/1) ... [2021-11-07 01:39:50,357 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:39:50,358 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:39:50,358 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:39:50,358 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:39:50,368 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:39:50" (1/1) ... [2021-11-07 01:39:50,368 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:39:50" (1/1) ... [2021-11-07 01:39:50,390 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:39:50" (1/1) ... [2021-11-07 01:39:50,391 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:39:50" (1/1) ... [2021-11-07 01:39:50,464 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:39:50" (1/1) ... [2021-11-07 01:39:50,495 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:39:50" (1/1) ... [2021-11-07 01:39:50,503 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:39:50" (1/1) ... [2021-11-07 01:39:50,518 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:39:50,519 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:39:50,519 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:39:50,519 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:39:50,520 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:39:50" (1/1) ... [2021-11-07 01:39:50,528 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:39:50,541 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e767ed3-c0af-4a77-8651-e58c0bc0eff2/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:39:50,555 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e767ed3-c0af-4a77-8651-e58c0bc0eff2/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:39:50,584 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e767ed3-c0af-4a77-8651-e58c0bc0eff2/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:39:50,624 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2021-11-07 01:39:50,624 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:39:50,625 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 01:39:50,625 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:39:50,625 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:39:55,736 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:39:55,737 INFO L299 CfgBuilder]: Removed 407 assume(true) statements. [2021-11-07 01:39:55,740 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:39:55 BoogieIcfgContainer [2021-11-07 01:39:55,740 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:39:55,742 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:39:55,742 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:39:55,750 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:39:55,750 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:39:48" (1/3) ... [2021-11-07 01:39:55,751 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1795af11 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:39:55, skipping insertion in model container [2021-11-07 01:39:55,751 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:39:50" (2/3) ... [2021-11-07 01:39:55,751 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1795af11 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:39:55, skipping insertion in model container [2021-11-07 01:39:55,751 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:39:55" (3/3) ... [2021-11-07 01:39:55,753 INFO L111 eAbstractionObserver]: Analyzing ICFG email_spec0_product33.cil.c [2021-11-07 01:39:55,758 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:39:55,759 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-07 01:39:55,827 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:39:55,837 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 01:39:55,837 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-07 01:39:55,877 INFO L276 IsEmpty]: Start isEmpty. Operand has 591 states, 588 states have (on average 1.7295918367346939) internal successors, (1017), 590 states have internal predecessors, (1017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:39:55,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-07 01:39:55,893 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:39:55,894 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:39:55,894 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:39:55,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:39:55,899 INFO L85 PathProgramCache]: Analyzing trace with hash 1732848670, now seen corresponding path program 1 times [2021-11-07 01:39:55,912 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:39:55,913 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1448812076] [2021-11-07 01:39:55,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:39:55,914 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:39:55,914 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e767ed3-c0af-4a77-8651-e58c0bc0eff2/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:39:55,917 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e767ed3-c0af-4a77-8651-e58c0bc0eff2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:39:55,920 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e767ed3-c0af-4a77-8651-e58c0bc0eff2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 01:39:56,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:39:56,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 542 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-07 01:39:56,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:39:56,703 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 01:39:56,703 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:39:56,889 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 01:39:56,890 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:39:56,891 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1448812076] [2021-11-07 01:39:56,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1448812076] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:39:56,892 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:39:56,892 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 01:39:56,894 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625356153] [2021-11-07 01:39:56,900 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 01:39:56,901 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:39:56,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 01:39:56,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 01:39:56,918 INFO L87 Difference]: Start difference. First operand has 591 states, 588 states have (on average 1.7295918367346939) internal successors, (1017), 590 states have internal predecessors, (1017), 0 states have call successors, (0), 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 34.0) internal successors, (68), 2 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:39:56,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:39:56,986 INFO L93 Difference]: Finished difference Result 936 states and 1586 transitions. [2021-11-07 01:39:56,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 01:39:56,988 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 34.0) internal successors, (68), 2 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-11-07 01:39:56,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:39:57,006 INFO L225 Difference]: With dead ends: 936 [2021-11-07 01:39:57,007 INFO L226 Difference]: Without dead ends: 552 [2021-11-07 01:39:57,012 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 134 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 01:39:57,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 552 states. [2021-11-07 01:39:57,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 552 to 552. [2021-11-07 01:39:57,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 552 states, 550 states have (on average 1.730909090909091) internal successors, (952), 551 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:39:57,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 952 transitions. [2021-11-07 01:39:57,094 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 952 transitions. Word has length 68 [2021-11-07 01:39:57,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:39:57,095 INFO L470 AbstractCegarLoop]: Abstraction has 552 states and 952 transitions. [2021-11-07 01:39:57,095 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 34.0) internal successors, (68), 2 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:39:57,095 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 952 transitions. [2021-11-07 01:39:57,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-07 01:39:57,101 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:39:57,102 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 01:39:57,121 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e767ed3-c0af-4a77-8651-e58c0bc0eff2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-11-07 01:39:57,318 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e767ed3-c0af-4a77-8651-e58c0bc0eff2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:39:57,318 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:39:57,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:39:57,319 INFO L85 PathProgramCache]: Analyzing trace with hash 1912528331, now seen corresponding path program 1 times [2021-11-07 01:39:57,320 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:39:57,321 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [170116400] [2021-11-07 01:39:57,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:39:57,321 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:39:57,321 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e767ed3-c0af-4a77-8651-e58c0bc0eff2/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:39:57,322 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e767ed3-c0af-4a77-8651-e58c0bc0eff2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:39:57,326 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e767ed3-c0af-4a77-8651-e58c0bc0eff2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 01:39:57,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:39:57,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 543 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:39:57,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:39:57,968 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 01:39:57,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:39:58,236 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 01:39:58,237 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:39:58,238 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [170116400] [2021-11-07 01:39:58,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [170116400] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:39:58,238 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:39:58,238 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:39:58,239 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005144574] [2021-11-07 01:39:58,241 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:39:58,242 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:39:58,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:39:58,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:39:58,245 INFO L87 Difference]: Start difference. First operand 552 states and 952 transitions. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 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 01:39:58,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:39:58,395 INFO L93 Difference]: Finished difference Result 1626 states and 2808 transitions. [2021-11-07 01:39:58,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:39:58,396 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 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 69 [2021-11-07 01:39:58,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:39:58,404 INFO L225 Difference]: With dead ends: 1626 [2021-11-07 01:39:58,404 INFO L226 Difference]: Without dead ends: 1089 [2021-11-07 01:39:58,407 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:39:58,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1089 states. [2021-11-07 01:39:58,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1089 to 551. [2021-11-07 01:39:58,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 551 states, 549 states have (on average 1.7249544626593807) internal successors, (947), 550 states have internal predecessors, (947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:39:58,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 551 states to 551 states and 947 transitions. [2021-11-07 01:39:58,460 INFO L78 Accepts]: Start accepts. Automaton has 551 states and 947 transitions. Word has length 69 [2021-11-07 01:39:58,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:39:58,460 INFO L470 AbstractCegarLoop]: Abstraction has 551 states and 947 transitions. [2021-11-07 01:39:58,460 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 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 01:39:58,461 INFO L276 IsEmpty]: Start isEmpty. Operand 551 states and 947 transitions. [2021-11-07 01:39:58,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-07 01:39:58,463 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:39:58,464 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 01:39:58,492 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e767ed3-c0af-4a77-8651-e58c0bc0eff2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 01:39:58,681 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e767ed3-c0af-4a77-8651-e58c0bc0eff2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:39:58,682 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:39:58,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:39:58,682 INFO L85 PathProgramCache]: Analyzing trace with hash 332124721, now seen corresponding path program 1 times [2021-11-07 01:39:58,684 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:39:58,684 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [282405967] [2021-11-07 01:39:58,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:39:58,684 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:39:58,685 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e767ed3-c0af-4a77-8651-e58c0bc0eff2/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:39:58,689 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e767ed3-c0af-4a77-8651-e58c0bc0eff2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:39:58,704 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e767ed3-c0af-4a77-8651-e58c0bc0eff2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 01:39:59,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:39:59,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 545 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:39:59,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:39:59,394 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 01:39:59,394 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:39:59,633 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 01:39:59,633 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:39:59,634 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [282405967] [2021-11-07 01:39:59,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [282405967] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:39:59,634 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:39:59,634 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:39:59,635 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906038017] [2021-11-07 01:39:59,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:39:59,635 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:39:59,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:39:59,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:39:59,637 INFO L87 Difference]: Start difference. First operand 551 states and 947 transitions. Second operand has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:39:59,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:39:59,912 INFO L93 Difference]: Finished difference Result 2121 states and 3650 transitions. [2021-11-07 01:39:59,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:39:59,913 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-11-07 01:39:59,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:39:59,927 INFO L225 Difference]: With dead ends: 2121 [2021-11-07 01:39:59,927 INFO L226 Difference]: Without dead ends: 1588 [2021-11-07 01:39:59,929 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:39:59,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1588 states. [2021-11-07 01:40:00,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1588 to 550. [2021-11-07 01:40:00,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 550 states, 548 states have (on average 1.7208029197080292) internal successors, (943), 549 states have internal predecessors, (943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:40:00,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 550 states to 550 states and 943 transitions. [2021-11-07 01:40:00,005 INFO L78 Accepts]: Start accepts. Automaton has 550 states and 943 transitions. Word has length 71 [2021-11-07 01:40:00,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:40:00,006 INFO L470 AbstractCegarLoop]: Abstraction has 550 states and 943 transitions. [2021-11-07 01:40:00,008 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:40:00,008 INFO L276 IsEmpty]: Start isEmpty. Operand 550 states and 943 transitions. [2021-11-07 01:40:00,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-07 01:40:00,010 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:40:00,011 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 01:40:00,035 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e767ed3-c0af-4a77-8651-e58c0bc0eff2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 01:40:00,233 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e767ed3-c0af-4a77-8651-e58c0bc0eff2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:40:00,234 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:40:00,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:40:00,234 INFO L85 PathProgramCache]: Analyzing trace with hash 2050293316, now seen corresponding path program 1 times [2021-11-07 01:40:00,235 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:40:00,235 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2010767146] [2021-11-07 01:40:00,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:40:00,236 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:40:00,236 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e767ed3-c0af-4a77-8651-e58c0bc0eff2/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:40:00,240 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e767ed3-c0af-4a77-8651-e58c0bc0eff2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:40:00,277 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e767ed3-c0af-4a77-8651-e58c0bc0eff2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 01:40:00,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:40:00,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 546 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:40:00,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:40:01,023 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 01:40:01,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:40:01,234 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 01:40:01,234 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:40:01,234 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2010767146] [2021-11-07 01:40:01,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2010767146] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:40:01,235 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:40:01,235 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:40:01,235 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805369966] [2021-11-07 01:40:01,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:40:01,236 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:40:01,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:40:01,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:40:01,237 INFO L87 Difference]: Start difference. First operand 550 states and 943 transitions. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:40:01,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:40:01,357 INFO L93 Difference]: Finished difference Result 1097 states and 1883 transitions. [2021-11-07 01:40:01,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:40:01,358 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-11-07 01:40:01,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:40:01,364 INFO L225 Difference]: With dead ends: 1097 [2021-11-07 01:40:01,364 INFO L226 Difference]: Without dead ends: 555 [2021-11-07 01:40:01,366 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:40:01,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2021-11-07 01:40:01,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 550. [2021-11-07 01:40:01,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 550 states, 548 states have (on average 1.7153284671532847) internal successors, (940), 549 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:40:01,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 550 states to 550 states and 940 transitions. [2021-11-07 01:40:01,407 INFO L78 Accepts]: Start accepts. Automaton has 550 states and 940 transitions. Word has length 72 [2021-11-07 01:40:01,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:40:01,407 INFO L470 AbstractCegarLoop]: Abstraction has 550 states and 940 transitions. [2021-11-07 01:40:01,408 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:40:01,408 INFO L276 IsEmpty]: Start isEmpty. Operand 550 states and 940 transitions. [2021-11-07 01:40:01,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-07 01:40:01,411 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:40:01,412 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 01:40:01,434 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e767ed3-c0af-4a77-8651-e58c0bc0eff2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 01:40:01,627 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e767ed3-c0af-4a77-8651-e58c0bc0eff2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:40:01,627 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:40:01,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:40:01,628 INFO L85 PathProgramCache]: Analyzing trace with hash 256821529, now seen corresponding path program 1 times [2021-11-07 01:40:01,629 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:40:01,629 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1397269570] [2021-11-07 01:40:01,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:40:01,629 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:40:01,629 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e767ed3-c0af-4a77-8651-e58c0bc0eff2/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:40:01,630 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e767ed3-c0af-4a77-8651-e58c0bc0eff2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:40:01,668 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e767ed3-c0af-4a77-8651-e58c0bc0eff2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 01:40:02,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:40:02,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 547 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:40:02,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:40:02,384 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 01:40:02,384 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:40:02,648 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 01:40:02,649 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:40:02,654 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1397269570] [2021-11-07 01:40:02,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1397269570] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:40:02,655 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:40:02,655 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:40:02,655 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190131616] [2021-11-07 01:40:02,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:40:02,658 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:40:02,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:40:02,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:40:02,665 INFO L87 Difference]: Start difference. First operand 550 states and 940 transitions. Second operand has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:40:03,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:40:03,008 INFO L93 Difference]: Finished difference Result 2108 states and 3626 transitions. [2021-11-07 01:40:03,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:40:03,009 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 0 states have call successors, (0), 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 01:40:03,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:40:03,022 INFO L225 Difference]: With dead ends: 2108 [2021-11-07 01:40:03,023 INFO L226 Difference]: Without dead ends: 1584 [2021-11-07 01:40:03,024 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 140 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 01:40:03,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1584 states. [2021-11-07 01:40:03,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1584 to 550. [2021-11-07 01:40:03,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 550 states, 548 states have (on average 1.7098540145985401) internal successors, (937), 549 states have internal predecessors, (937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:40:03,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 550 states to 550 states and 937 transitions. [2021-11-07 01:40:03,100 INFO L78 Accepts]: Start accepts. Automaton has 550 states and 937 transitions. Word has length 73 [2021-11-07 01:40:03,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:40:03,100 INFO L470 AbstractCegarLoop]: Abstraction has 550 states and 937 transitions. [2021-11-07 01:40:03,100 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:40:03,101 INFO L276 IsEmpty]: Start isEmpty. Operand 550 states and 937 transitions. [2021-11-07 01:40:03,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-07 01:40:03,102 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:40:03,103 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 01:40:03,123 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e767ed3-c0af-4a77-8651-e58c0bc0eff2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 01:40:03,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e767ed3-c0af-4a77-8651-e58c0bc0eff2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:40:03,320 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:40:03,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:40:03,320 INFO L85 PathProgramCache]: Analyzing trace with hash -9793900, now seen corresponding path program 1 times [2021-11-07 01:40:03,321 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:40:03,322 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [656787834] [2021-11-07 01:40:03,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:40:03,323 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:40:03,323 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e767ed3-c0af-4a77-8651-e58c0bc0eff2/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:40:03,324 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e767ed3-c0af-4a77-8651-e58c0bc0eff2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:40:03,334 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e767ed3-c0af-4a77-8651-e58c0bc0eff2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 01:40:03,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:40:03,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 549 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:40:03,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:40:04,098 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 01:40:04,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:40:04,342 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 01:40:04,342 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:40:04,343 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [656787834] [2021-11-07 01:40:04,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [656787834] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:40:04,343 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:40:04,343 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:40:04,343 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933354018] [2021-11-07 01:40:04,344 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:40:04,344 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:40:04,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:40:04,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:40:04,345 INFO L87 Difference]: Start difference. First operand 550 states and 937 transitions. Second operand has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:40:04,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:40:04,474 INFO L93 Difference]: Finished difference Result 1380 states and 2351 transitions. [2021-11-07 01:40:04,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:40:04,475 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-11-07 01:40:04,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:40:04,483 INFO L225 Difference]: With dead ends: 1380 [2021-11-07 01:40:04,483 INFO L226 Difference]: Without dead ends: 1074 [2021-11-07 01:40:04,484 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 146 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 01:40:04,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1074 states. [2021-11-07 01:40:04,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1074 to 768. [2021-11-07 01:40:04,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 768 states, 766 states have (on average 1.7428198433420365) internal successors, (1335), 767 states have internal predecessors, (1335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:40:04,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 768 states to 768 states and 1335 transitions. [2021-11-07 01:40:04,559 INFO L78 Accepts]: Start accepts. Automaton has 768 states and 1335 transitions. Word has length 75 [2021-11-07 01:40:04,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:40:04,560 INFO L470 AbstractCegarLoop]: Abstraction has 768 states and 1335 transitions. [2021-11-07 01:40:04,560 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:40:04,560 INFO L276 IsEmpty]: Start isEmpty. Operand 768 states and 1335 transitions. [2021-11-07 01:40:04,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-07 01:40:04,570 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:40:04,570 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:40:04,588 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e767ed3-c0af-4a77-8651-e58c0bc0eff2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 01:40:04,783 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e767ed3-c0af-4a77-8651-e58c0bc0eff2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:40:04,784 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:40:04,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:40:04,784 INFO L85 PathProgramCache]: Analyzing trace with hash 507396229, now seen corresponding path program 1 times [2021-11-07 01:40:04,785 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:40:04,785 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [859848671] [2021-11-07 01:40:04,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:40:04,785 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:40:04,786 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e767ed3-c0af-4a77-8651-e58c0bc0eff2/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:40:04,787 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e767ed3-c0af-4a77-8651-e58c0bc0eff2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:40:04,789 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e767ed3-c0af-4a77-8651-e58c0bc0eff2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 01:40:05,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:40:05,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 561 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:40:05,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:40:05,622 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 01:40:05,622 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:40:05,836 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 01:40:05,836 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:40:05,836 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [859848671] [2021-11-07 01:40:05,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [859848671] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:40:05,837 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:40:05,837 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:40:05,837 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979995780] [2021-11-07 01:40:05,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:40:05,837 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:40:05,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:40:05,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:40:05,838 INFO L87 Difference]: Start difference. First operand 768 states and 1335 transitions. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:40:05,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:40:05,971 INFO L93 Difference]: Finished difference Result 1924 states and 3346 transitions. [2021-11-07 01:40:05,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:40:05,972 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 87 [2021-11-07 01:40:05,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:40:05,981 INFO L225 Difference]: With dead ends: 1924 [2021-11-07 01:40:05,982 INFO L226 Difference]: Without dead ends: 1240 [2021-11-07 01:40:05,984 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:40:05,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1240 states. [2021-11-07 01:40:06,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1240 to 934. [2021-11-07 01:40:06,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 934 states, 932 states have (on average 1.7553648068669527) internal successors, (1636), 933 states have internal predecessors, (1636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:40:06,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 934 states to 934 states and 1636 transitions. [2021-11-07 01:40:06,084 INFO L78 Accepts]: Start accepts. Automaton has 934 states and 1636 transitions. Word has length 87 [2021-11-07 01:40:06,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:40:06,085 INFO L470 AbstractCegarLoop]: Abstraction has 934 states and 1636 transitions. [2021-11-07 01:40:06,085 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:40:06,085 INFO L276 IsEmpty]: Start isEmpty. Operand 934 states and 1636 transitions. [2021-11-07 01:40:06,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-07 01:40:06,089 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:40:06,089 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:40:06,107 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e767ed3-c0af-4a77-8651-e58c0bc0eff2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 01:40:06,305 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e767ed3-c0af-4a77-8651-e58c0bc0eff2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:40:06,306 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:40:06,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:40:06,306 INFO L85 PathProgramCache]: Analyzing trace with hash 150237028, now seen corresponding path program 1 times [2021-11-07 01:40:06,307 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:40:06,307 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1777562115] [2021-11-07 01:40:06,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:40:06,308 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:40:06,308 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e767ed3-c0af-4a77-8651-e58c0bc0eff2/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:40:06,310 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e767ed3-c0af-4a77-8651-e58c0bc0eff2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:40:06,350 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e767ed3-c0af-4a77-8651-e58c0bc0eff2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 01:40:06,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:40:06,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 563 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:40:06,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:40:07,211 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 01:40:07,212 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:40:07,467 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 01:40:07,467 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:40:07,468 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1777562115] [2021-11-07 01:40:07,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1777562115] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:40:07,468 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:40:07,468 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:40:07,468 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756064237] [2021-11-07 01:40:07,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:40:07,469 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:40:07,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:40:07,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:40:07,470 INFO L87 Difference]: Start difference. First operand 934 states and 1636 transitions. Second operand has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:40:07,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:40:07,640 INFO L93 Difference]: Finished difference Result 2454 states and 4314 transitions. [2021-11-07 01:40:07,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:40:07,640 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 88 [2021-11-07 01:40:07,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:40:07,653 INFO L225 Difference]: With dead ends: 2454 [2021-11-07 01:40:07,653 INFO L226 Difference]: Without dead ends: 1612 [2021-11-07 01:40:07,655 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:40:07,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1612 states. [2021-11-07 01:40:07,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1612 to 1306. [2021-11-07 01:40:07,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1306 states, 1304 states have (on average 1.7745398773006136) internal successors, (2314), 1305 states have internal predecessors, (2314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:40:07,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1306 states to 1306 states and 2314 transitions. [2021-11-07 01:40:07,811 INFO L78 Accepts]: Start accepts. Automaton has 1306 states and 2314 transitions. Word has length 88 [2021-11-07 01:40:07,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:40:07,812 INFO L470 AbstractCegarLoop]: Abstraction has 1306 states and 2314 transitions. [2021-11-07 01:40:07,812 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:40:07,813 INFO L276 IsEmpty]: Start isEmpty. Operand 1306 states and 2314 transitions. [2021-11-07 01:40:07,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-07 01:40:07,817 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:40:07,818 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:40:07,840 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e767ed3-c0af-4a77-8651-e58c0bc0eff2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 01:40:08,040 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e767ed3-c0af-4a77-8651-e58c0bc0eff2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:40:08,041 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:40:08,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:40:08,041 INFO L85 PathProgramCache]: Analyzing trace with hash 250659507, now seen corresponding path program 1 times [2021-11-07 01:40:08,042 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:40:08,042 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [580627568] [2021-11-07 01:40:08,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:40:08,043 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:40:08,043 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e767ed3-c0af-4a77-8651-e58c0bc0eff2/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:40:08,044 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e767ed3-c0af-4a77-8651-e58c0bc0eff2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:40:08,086 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e767ed3-c0af-4a77-8651-e58c0bc0eff2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 01:40:08,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:40:08,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 565 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:40:08,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:40:08,935 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 01:40:08,935 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:40:09,189 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 01:40:09,189 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:40:09,189 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [580627568] [2021-11-07 01:40:09,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [580627568] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:40:09,190 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:40:09,190 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:40:09,190 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134739909] [2021-11-07 01:40:09,191 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:40:09,191 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:40:09,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:40:09,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:40:09,192 INFO L87 Difference]: Start difference. First operand 1306 states and 2314 transitions. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:40:09,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:40:09,392 INFO L93 Difference]: Finished difference Result 3550 states and 6317 transitions. [2021-11-07 01:40:09,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:40:09,393 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 89 [2021-11-07 01:40:09,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:40:09,409 INFO L225 Difference]: With dead ends: 3550 [2021-11-07 01:40:09,409 INFO L226 Difference]: Without dead ends: 2344 [2021-11-07 01:40:09,412 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:40:09,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2344 states. [2021-11-07 01:40:09,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2344 to 2038. [2021-11-07 01:40:09,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2038 states, 2036 states have (on average 1.7922396856581533) internal successors, (3649), 2037 states have internal predecessors, (3649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:40:09,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2038 states to 2038 states and 3649 transitions. [2021-11-07 01:40:09,609 INFO L78 Accepts]: Start accepts. Automaton has 2038 states and 3649 transitions. Word has length 89 [2021-11-07 01:40:09,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:40:09,610 INFO L470 AbstractCegarLoop]: Abstraction has 2038 states and 3649 transitions. [2021-11-07 01:40:09,610 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:40:09,610 INFO L276 IsEmpty]: Start isEmpty. Operand 2038 states and 3649 transitions. [2021-11-07 01:40:09,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-11-07 01:40:09,617 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:40:09,617 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:40:09,640 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e767ed3-c0af-4a77-8651-e58c0bc0eff2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 01:40:09,839 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e767ed3-c0af-4a77-8651-e58c0bc0eff2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:40:09,840 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:40:09,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:40:09,840 INFO L85 PathProgramCache]: Analyzing trace with hash 957784115, now seen corresponding path program 1 times [2021-11-07 01:40:09,841 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:40:09,841 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2106112779] [2021-11-07 01:40:09,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:40:09,841 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:40:09,842 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e767ed3-c0af-4a77-8651-e58c0bc0eff2/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:40:09,843 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e767ed3-c0af-4a77-8651-e58c0bc0eff2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:40:09,888 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e767ed3-c0af-4a77-8651-e58c0bc0eff2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 01:40:10,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:40:10,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 567 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:40:10,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:40:10,798 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 01:40:10,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:40:11,068 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 01:40:11,068 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:40:11,068 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2106112779] [2021-11-07 01:40:11,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2106112779] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:40:11,069 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:40:11,069 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:40:11,069 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744490425] [2021-11-07 01:40:11,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:40:11,070 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:40:11,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:40:11,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:40:11,071 INFO L87 Difference]: Start difference. First operand 2038 states and 3649 transitions. Second operand has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:40:11,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:40:11,362 INFO L93 Difference]: Finished difference Result 5482 states and 9841 transitions. [2021-11-07 01:40:11,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:40:11,363 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-11-07 01:40:11,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:40:11,387 INFO L225 Difference]: With dead ends: 5482 [2021-11-07 01:40:11,387 INFO L226 Difference]: Without dead ends: 3578 [2021-11-07 01:40:11,391 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 177 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 01:40:11,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3578 states. [2021-11-07 01:40:11,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3578 to 3272. [2021-11-07 01:40:11,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3272 states, 3270 states have (on average 1.802446483180428) internal successors, (5894), 3271 states have internal predecessors, (5894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:40:11,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3272 states to 3272 states and 5894 transitions. [2021-11-07 01:40:11,715 INFO L78 Accepts]: Start accepts. Automaton has 3272 states and 5894 transitions. Word has length 90 [2021-11-07 01:40:11,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:40:11,716 INFO L470 AbstractCegarLoop]: Abstraction has 3272 states and 5894 transitions. [2021-11-07 01:40:11,716 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:40:11,716 INFO L276 IsEmpty]: Start isEmpty. Operand 3272 states and 5894 transitions. [2021-11-07 01:40:11,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-07 01:40:11,725 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:40:11,725 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:40:11,748 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e767ed3-c0af-4a77-8651-e58c0bc0eff2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 01:40:11,940 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e767ed3-c0af-4a77-8651-e58c0bc0eff2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:40:11,940 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:40:11,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:40:11,940 INFO L85 PathProgramCache]: Analyzing trace with hash -2137484828, now seen corresponding path program 1 times [2021-11-07 01:40:11,941 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:40:11,941 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [973889547] [2021-11-07 01:40:11,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:40:11,942 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:40:11,942 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e767ed3-c0af-4a77-8651-e58c0bc0eff2/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:40:11,943 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e767ed3-c0af-4a77-8651-e58c0bc0eff2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:40:11,944 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e767ed3-c0af-4a77-8651-e58c0bc0eff2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 01:40:12,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:40:12,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 569 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:40:12,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:40:12,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:40:12,860 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:40:13,139 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 01:40:13,139 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:40:13,139 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [973889547] [2021-11-07 01:40:13,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [973889547] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:40:13,140 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:40:13,140 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:40:13,140 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231349231] [2021-11-07 01:40:13,140 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:40:13,140 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:40:13,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:40:13,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:40:13,142 INFO L87 Difference]: Start difference. First operand 3272 states and 5894 transitions. Second operand has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:40:13,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:40:13,566 INFO L93 Difference]: Finished difference Result 8900 states and 16059 transitions. [2021-11-07 01:40:13,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:40:13,567 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 91 [2021-11-07 01:40:13,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:40:13,608 INFO L225 Difference]: With dead ends: 8900 [2021-11-07 01:40:13,609 INFO L226 Difference]: Without dead ends: 5796 [2021-11-07 01:40:13,615 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 179 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 01:40:13,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5796 states. [2021-11-07 01:40:14,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5796 to 5490. [2021-11-07 01:40:14,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5490 states, 5488 states have (on average 1.8073979591836735) internal successors, (9919), 5489 states have internal predecessors, (9919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:40:14,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5490 states to 5490 states and 9919 transitions. [2021-11-07 01:40:14,139 INFO L78 Accepts]: Start accepts. Automaton has 5490 states and 9919 transitions. Word has length 91 [2021-11-07 01:40:14,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:40:14,141 INFO L470 AbstractCegarLoop]: Abstraction has 5490 states and 9919 transitions. [2021-11-07 01:40:14,141 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:40:14,141 INFO L276 IsEmpty]: Start isEmpty. Operand 5490 states and 9919 transitions. [2021-11-07 01:40:14,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-07 01:40:14,155 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:40:14,156 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:40:14,185 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e767ed3-c0af-4a77-8651-e58c0bc0eff2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 01:40:14,374 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e767ed3-c0af-4a77-8651-e58c0bc0eff2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:40:14,374 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:40:14,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:40:14,375 INFO L85 PathProgramCache]: Analyzing trace with hash 1718677060, now seen corresponding path program 1 times [2021-11-07 01:40:14,376 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:40:14,376 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [809754862] [2021-11-07 01:40:14,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:40:14,376 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:40:14,377 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e767ed3-c0af-4a77-8651-e58c0bc0eff2/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:40:14,377 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e767ed3-c0af-4a77-8651-e58c0bc0eff2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:40:14,379 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e767ed3-c0af-4a77-8651-e58c0bc0eff2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 01:40:15,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:40:15,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 571 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:40:15,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:40:15,291 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 01:40:15,291 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:40:15,515 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 01:40:15,515 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:40:15,515 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [809754862] [2021-11-07 01:40:15,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [809754862] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:40:15,516 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:40:15,516 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:40:15,516 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109557083] [2021-11-07 01:40:15,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:40:15,516 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:40:15,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:40:15,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:40:15,517 INFO L87 Difference]: Start difference. First operand 5490 states and 9919 transitions. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:40:16,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:40:16,003 INFO L93 Difference]: Finished difference Result 15880 states and 28745 transitions. [2021-11-07 01:40:16,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:40:16,004 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2021-11-07 01:40:16,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:40:16,050 INFO L225 Difference]: With dead ends: 15880 [2021-11-07 01:40:16,051 INFO L226 Difference]: Without dead ends: 10566 [2021-11-07 01:40:16,059 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 181 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 01:40:16,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10566 states. [2021-11-07 01:40:16,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10566 to 10260. [2021-11-07 01:40:16,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10260 states, 10258 states have (on average 1.8108793137063754) internal successors, (18576), 10259 states have internal predecessors, (18576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:40:16,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10260 states to 10260 states and 18576 transitions. [2021-11-07 01:40:16,806 INFO L78 Accepts]: Start accepts. Automaton has 10260 states and 18576 transitions. Word has length 92 [2021-11-07 01:40:16,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:40:16,806 INFO L470 AbstractCegarLoop]: Abstraction has 10260 states and 18576 transitions. [2021-11-07 01:40:16,806 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:40:16,807 INFO L276 IsEmpty]: Start isEmpty. Operand 10260 states and 18576 transitions. [2021-11-07 01:40:16,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-07 01:40:16,828 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:40:16,828 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:40:16,852 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e767ed3-c0af-4a77-8651-e58c0bc0eff2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-07 01:40:17,044 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e767ed3-c0af-4a77-8651-e58c0bc0eff2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:40:17,044 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:40:17,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:40:17,045 INFO L85 PathProgramCache]: Analyzing trace with hash -321366732, now seen corresponding path program 1 times [2021-11-07 01:40:17,046 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:40:17,046 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1617703865] [2021-11-07 01:40:17,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:40:17,046 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:40:17,047 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e767ed3-c0af-4a77-8651-e58c0bc0eff2/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:40:17,048 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e767ed3-c0af-4a77-8651-e58c0bc0eff2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:40:17,088 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e767ed3-c0af-4a77-8651-e58c0bc0eff2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 01:40:17,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:40:18,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 581 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:40:18,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:40:18,274 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 01:40:18,274 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:40:18,587 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 01:40:18,587 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:40:18,587 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1617703865] [2021-11-07 01:40:18,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1617703865] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:40:18,587 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:40:18,587 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:40:18,588 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047890796] [2021-11-07 01:40:18,588 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:40:18,588 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:40:18,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:40:18,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:40:18,589 INFO L87 Difference]: Start difference. First operand 10260 states and 18576 transitions. Second operand has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:40:21,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:40:21,663 INFO L93 Difference]: Finished difference Result 25339 states and 45881 transitions. [2021-11-07 01:40:21,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:40:21,664 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 93 [2021-11-07 01:40:21,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:40:21,721 INFO L225 Difference]: With dead ends: 25339 [2021-11-07 01:40:21,721 INFO L226 Difference]: Without dead ends: 15333 [2021-11-07 01:40:21,736 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 180 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 01:40:21,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15333 states. [2021-11-07 01:40:22,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15333 to 10227. [2021-11-07 01:40:22,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10227 states, 10225 states have (on average 1.8038141809290953) internal successors, (18444), 10226 states have internal predecessors, (18444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:40:22,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10227 states to 10227 states and 18444 transitions. [2021-11-07 01:40:22,529 INFO L78 Accepts]: Start accepts. Automaton has 10227 states and 18444 transitions. Word has length 93 [2021-11-07 01:40:22,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:40:22,530 INFO L470 AbstractCegarLoop]: Abstraction has 10227 states and 18444 transitions. [2021-11-07 01:40:22,531 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:40:22,531 INFO L276 IsEmpty]: Start isEmpty. Operand 10227 states and 18444 transitions. [2021-11-07 01:40:22,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-07 01:40:22,548 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:40:22,549 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:40:22,574 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e767ed3-c0af-4a77-8651-e58c0bc0eff2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-07 01:40:22,768 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e767ed3-c0af-4a77-8651-e58c0bc0eff2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:40:22,768 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:40:22,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:40:22,769 INFO L85 PathProgramCache]: Analyzing trace with hash 1033683923, now seen corresponding path program 1 times [2021-11-07 01:40:22,770 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:40:22,770 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1181404461] [2021-11-07 01:40:22,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:40:22,770 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:40:22,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e767ed3-c0af-4a77-8651-e58c0bc0eff2/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:40:22,771 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e767ed3-c0af-4a77-8651-e58c0bc0eff2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:40:22,774 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e767ed3-c0af-4a77-8651-e58c0bc0eff2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 01:40:23,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:40:23,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 573 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:40:23,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:40:23,959 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 01:40:23,959 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:40:24,172 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 01:40:24,173 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:40:24,173 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1181404461] [2021-11-07 01:40:24,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1181404461] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:40:24,173 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:40:24,173 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:40:24,173 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252240482] [2021-11-07 01:40:24,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:40:24,174 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:40:24,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:40:24,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:40:24,175 INFO L87 Difference]: Start difference. First operand 10227 states and 18444 transitions. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:40:25,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:40:25,223 INFO L93 Difference]: Finished difference Result 29923 states and 54027 transitions. [2021-11-07 01:40:25,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:40:25,224 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 93 [2021-11-07 01:40:25,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:40:25,278 INFO L225 Difference]: With dead ends: 29923 [2021-11-07 01:40:25,279 INFO L226 Difference]: Without dead ends: 19879 [2021-11-07 01:40:25,293 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 183 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 01:40:25,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19879 states. [2021-11-07 01:40:26,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19879 to 19573. [2021-11-07 01:40:26,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19573 states, 19571 states have (on average 1.8041489959634152) internal successors, (35309), 19572 states have internal predecessors, (35309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:40:26,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19573 states to 19573 states and 35309 transitions. [2021-11-07 01:40:26,620 INFO L78 Accepts]: Start accepts. Automaton has 19573 states and 35309 transitions. Word has length 93 [2021-11-07 01:40:26,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:40:26,620 INFO L470 AbstractCegarLoop]: Abstraction has 19573 states and 35309 transitions. [2021-11-07 01:40:26,620 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:40:26,620 INFO L276 IsEmpty]: Start isEmpty. Operand 19573 states and 35309 transitions. [2021-11-07 01:40:26,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-07 01:40:26,639 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:40:26,639 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:40:26,662 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e767ed3-c0af-4a77-8651-e58c0bc0eff2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-07 01:40:26,852 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e767ed3-c0af-4a77-8651-e58c0bc0eff2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:40:26,852 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:40:26,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:40:26,853 INFO L85 PathProgramCache]: Analyzing trace with hash 1067595411, now seen corresponding path program 1 times [2021-11-07 01:40:26,854 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:40:26,854 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1492230481] [2021-11-07 01:40:26,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:40:26,854 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:40:26,854 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e767ed3-c0af-4a77-8651-e58c0bc0eff2/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:40:26,855 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e767ed3-c0af-4a77-8651-e58c0bc0eff2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:40:26,863 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e767ed3-c0af-4a77-8651-e58c0bc0eff2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 01:40:27,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:40:27,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 575 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:40:27,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:40:27,882 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 01:40:27,882 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:40:28,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:40:28,093 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:40:28,093 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1492230481] [2021-11-07 01:40:28,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1492230481] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:40:28,093 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:40:28,093 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:40:28,093 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104071585] [2021-11-07 01:40:28,094 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:40:28,094 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:40:28,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:40:28,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:40:28,095 INFO L87 Difference]: Start difference. First operand 19573 states and 35309 transitions. Second operand has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:40:29,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:40:29,638 INFO L93 Difference]: Finished difference Result 58147 states and 104936 transitions. [2021-11-07 01:40:29,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:40:29,639 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 94 [2021-11-07 01:40:29,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:40:29,730 INFO L225 Difference]: With dead ends: 58147 [2021-11-07 01:40:29,730 INFO L226 Difference]: Without dead ends: 38761 [2021-11-07 01:40:29,762 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 185 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 01:40:29,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38761 states. [2021-11-07 01:40:32,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38761 to 38455. [2021-11-07 01:40:32,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38455 states, 38453 states have (on average 1.8020440537799391) internal successors, (69294), 38454 states have internal predecessors, (69294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:40:32,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38455 states to 38455 states and 69294 transitions. [2021-11-07 01:40:32,237 INFO L78 Accepts]: Start accepts. Automaton has 38455 states and 69294 transitions. Word has length 94 [2021-11-07 01:40:32,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:40:32,238 INFO L470 AbstractCegarLoop]: Abstraction has 38455 states and 69294 transitions. [2021-11-07 01:40:32,238 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:40:32,238 INFO L276 IsEmpty]: Start isEmpty. Operand 38455 states and 69294 transitions. [2021-11-07 01:40:32,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-07 01:40:32,274 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:40:32,274 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:40:32,294 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e767ed3-c0af-4a77-8651-e58c0bc0eff2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2021-11-07 01:40:32,494 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e767ed3-c0af-4a77-8651-e58c0bc0eff2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:40:32,494 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:40:32,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:40:32,495 INFO L85 PathProgramCache]: Analyzing trace with hash 2116983802, now seen corresponding path program 1 times [2021-11-07 01:40:32,496 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:40:32,496 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [463964215] [2021-11-07 01:40:32,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:40:32,496 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:40:32,496 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e767ed3-c0af-4a77-8651-e58c0bc0eff2/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:40:32,498 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e767ed3-c0af-4a77-8651-e58c0bc0eff2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:40:32,541 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e767ed3-c0af-4a77-8651-e58c0bc0eff2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-07 01:40:33,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:40:33,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 583 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:40:33,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:40:33,801 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 01:40:33,801 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:40:34,098 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 01:40:34,098 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:40:34,098 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [463964215] [2021-11-07 01:40:34,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [463964215] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:40:34,099 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:40:34,099 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:40:34,099 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974050898] [2021-11-07 01:40:34,100 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:40:34,100 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:40:34,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:40:34,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:40:34,102 INFO L87 Difference]: Start difference. First operand 38455 states and 69294 transitions. Second operand has 6 states, 6 states have (on average 20.0) internal successors, (120), 6 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:40:41,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:40:41,078 INFO L93 Difference]: Finished difference Result 149217 states and 268723 transitions. [2021-11-07 01:40:41,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 01:40:41,079 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 20.0) internal successors, (120), 6 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-11-07 01:40:41,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:40:41,330 INFO L225 Difference]: With dead ends: 149217 [2021-11-07 01:40:41,330 INFO L226 Difference]: Without dead ends: 111015 [2021-11-07 01:40:41,382 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:40:41,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111015 states. [2021-11-07 01:40:44,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111015 to 38197. [2021-11-07 01:40:44,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38197 states, 38195 states have (on average 1.7871972771305145) internal successors, (68262), 38196 states have internal predecessors, (68262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:40:44,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38197 states to 38197 states and 68262 transitions. [2021-11-07 01:40:44,397 INFO L78 Accepts]: Start accepts. Automaton has 38197 states and 68262 transitions. Word has length 95 [2021-11-07 01:40:44,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:40:44,397 INFO L470 AbstractCegarLoop]: Abstraction has 38197 states and 68262 transitions. [2021-11-07 01:40:44,397 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.0) internal successors, (120), 6 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:40:44,397 INFO L276 IsEmpty]: Start isEmpty. Operand 38197 states and 68262 transitions. [2021-11-07 01:40:44,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-07 01:40:44,421 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:40:44,421 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:40:44,443 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e767ed3-c0af-4a77-8651-e58c0bc0eff2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-07 01:40:44,636 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e767ed3-c0af-4a77-8651-e58c0bc0eff2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:40:44,636 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:40:44,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:40:44,637 INFO L85 PathProgramCache]: Analyzing trace with hash 1279194776, now seen corresponding path program 1 times [2021-11-07 01:40:44,638 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:40:44,638 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [428844569] [2021-11-07 01:40:44,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:40:44,638 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:40:44,638 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e767ed3-c0af-4a77-8651-e58c0bc0eff2/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:40:44,639 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e767ed3-c0af-4a77-8651-e58c0bc0eff2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:40:44,639 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e767ed3-c0af-4a77-8651-e58c0bc0eff2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 01:40:45,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:40:45,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 583 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:40:45,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:40:45,809 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 01:40:45,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:40:46,026 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 01:40:46,026 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:40:46,027 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [428844569] [2021-11-07 01:40:46,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [428844569] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:40:46,027 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:40:46,027 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:40:46,027 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891731709] [2021-11-07 01:40:46,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:40:46,028 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:40:46,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:40:46,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:40:46,028 INFO L87 Difference]: Start difference. First operand 38197 states and 68262 transitions. Second operand has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 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 01:40:47,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:40:47,998 INFO L93 Difference]: Finished difference Result 76441 states and 136604 transitions. [2021-11-07 01:40:47,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:40:47,998 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 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 95 [2021-11-07 01:40:47,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:40:48,070 INFO L225 Difference]: With dead ends: 76441 [2021-11-07 01:40:48,070 INFO L226 Difference]: Without dead ends: 38503 [2021-11-07 01:40:48,102 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 186 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 01:40:48,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38503 states. [2021-11-07 01:40:50,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38503 to 38197. [2021-11-07 01:40:50,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38197 states, 38195 states have (on average 1.7838460531483178) internal successors, (68134), 38196 states have internal predecessors, (68134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:40:50,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38197 states to 38197 states and 68134 transitions. [2021-11-07 01:40:50,301 INFO L78 Accepts]: Start accepts. Automaton has 38197 states and 68134 transitions. Word has length 95 [2021-11-07 01:40:50,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:40:50,302 INFO L470 AbstractCegarLoop]: Abstraction has 38197 states and 68134 transitions. [2021-11-07 01:40:50,302 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 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 01:40:50,302 INFO L276 IsEmpty]: Start isEmpty. Operand 38197 states and 68134 transitions. [2021-11-07 01:40:50,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-07 01:40:50,320 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:40:50,320 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:40:50,346 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e767ed3-c0af-4a77-8651-e58c0bc0eff2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-07 01:40:50,541 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e767ed3-c0af-4a77-8651-e58c0bc0eff2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:40:50,541 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:40:50,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:40:50,542 INFO L85 PathProgramCache]: Analyzing trace with hash 311742661, now seen corresponding path program 1 times [2021-11-07 01:40:50,542 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:40:50,542 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1847503292] [2021-11-07 01:40:50,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:40:50,543 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:40:50,543 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e767ed3-c0af-4a77-8651-e58c0bc0eff2/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:40:50,544 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e767ed3-c0af-4a77-8651-e58c0bc0eff2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:40:50,546 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e767ed3-c0af-4a77-8651-e58c0bc0eff2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-07 01:40:51,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:40:51,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 577 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:40:51,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:40:51,743 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 01:40:51,743 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:40:51,982 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 01:40:51,982 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:40:51,982 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1847503292] [2021-11-07 01:40:51,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1847503292] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:40:51,982 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:40:51,982 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:40:51,982 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549823217] [2021-11-07 01:40:51,983 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:40:51,983 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:40:51,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:40:51,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:40:51,984 INFO L87 Difference]: Start difference. First operand 38197 states and 68134 transitions. Second operand has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:40:55,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:40:55,860 INFO L93 Difference]: Finished difference Result 106179 states and 189030 transitions. [2021-11-07 01:40:55,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:40:55,861 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-11-07 01:40:55,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:40:55,986 INFO L225 Difference]: With dead ends: 106179 [2021-11-07 01:40:55,986 INFO L226 Difference]: Without dead ends: 68201 [2021-11-07 01:40:56,010 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 187 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 01:40:56,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68201 states. [2021-11-07 01:40:59,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68201 to 67895. [2021-11-07 01:40:59,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67895 states, 67893 states have (on average 1.7746601269644882) internal successors, (120487), 67894 states have internal predecessors, (120487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:41:00,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67895 states to 67895 states and 120487 transitions. [2021-11-07 01:41:00,112 INFO L78 Accepts]: Start accepts. Automaton has 67895 states and 120487 transitions. Word has length 95 [2021-11-07 01:41:00,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:41:00,113 INFO L470 AbstractCegarLoop]: Abstraction has 67895 states and 120487 transitions. [2021-11-07 01:41:00,113 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:41:00,113 INFO L276 IsEmpty]: Start isEmpty. Operand 67895 states and 120487 transitions. [2021-11-07 01:41:00,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-07 01:41:00,132 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:41:00,133 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:41:00,146 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e767ed3-c0af-4a77-8651-e58c0bc0eff2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-07 01:41:00,333 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e767ed3-c0af-4a77-8651-e58c0bc0eff2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:41:00,511 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:41:00,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:41:00,512 INFO L85 PathProgramCache]: Analyzing trace with hash -713136802, now seen corresponding path program 1 times [2021-11-07 01:41:00,513 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:41:00,513 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [484914152] [2021-11-07 01:41:00,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:41:00,513 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:41:00,513 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e767ed3-c0af-4a77-8651-e58c0bc0eff2/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:41:00,533 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e767ed3-c0af-4a77-8651-e58c0bc0eff2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:41:00,541 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e767ed3-c0af-4a77-8651-e58c0bc0eff2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-07 01:41:01,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:41:01,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 584 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:41:01,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:41:01,740 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:41:01,740 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:41:02,031 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:41:02,032 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:41:02,032 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [484914152] [2021-11-07 01:41:02,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [484914152] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:41:02,032 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [919490757] [2021-11-07 01:41:02,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:41:02,033 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:41:02,033 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e767ed3-c0af-4a77-8651-e58c0bc0eff2/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:41:02,040 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e767ed3-c0af-4a77-8651-e58c0bc0eff2/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:41:02,045 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e767ed3-c0af-4a77-8651-e58c0bc0eff2/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2021-11-07 01:41:03,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:41:03,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 584 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:41:03,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:41:03,632 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:41:03,632 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:41:03,942 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:41:03,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [919490757] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:41:03,943 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:41:03,943 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [5, 5] total 16 [2021-11-07 01:41:03,943 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404944047] [2021-11-07 01:41:03,944 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-07 01:41:03,944 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:41:03,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-07 01:41:03,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-11-07 01:41:03,946 INFO L87 Difference]: Start difference. First operand 67895 states and 120487 transitions. Second operand has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)