./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/email_spec11_product30.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_68585d2a-d53e-4e92-82fa-9020a5215cf6/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68585d2a-d53e-4e92-82fa-9020a5215cf6/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_68585d2a-d53e-4e92-82fa-9020a5215cf6/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68585d2a-d53e-4e92-82fa-9020a5215cf6/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec11_product30.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68585d2a-d53e-4e92-82fa-9020a5215cf6/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_68585d2a-d53e-4e92-82fa-9020a5215cf6/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 e4fb36b23f327758af91661b12ca1735faf7949901dbd5c1543c17ea0384ceb9 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:42:42,010 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:42:42,013 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:42:42,053 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:42:42,054 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:42:42,055 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:42:42,058 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:42:42,061 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:42:42,064 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:42:42,066 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:42:42,068 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:42:42,070 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:42:42,071 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:42:42,072 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:42:42,075 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:42:42,077 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:42:42,078 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:42:42,080 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:42:42,083 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:42:42,087 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:42:42,090 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:42:42,092 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:42:42,094 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:42:42,096 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:42:42,101 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:42:42,101 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:42:42,102 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:42:42,104 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:42:42,104 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:42:42,106 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:42:42,107 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:42:42,108 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:42:42,109 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:42:42,111 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:42:42,113 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:42:42,113 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:42:42,115 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:42:42,115 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:42:42,116 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:42:42,117 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:42:42,118 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:42:42,120 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68585d2a-d53e-4e92-82fa-9020a5215cf6/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 01:42:42,153 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:42:42,153 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:42:42,155 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:42:42,155 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:42:42,156 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:42:42,156 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:42:42,157 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:42:42,157 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:42:42,158 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:42:42,158 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:42:42,158 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:42:42,159 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:42:42,159 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:42:42,160 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:42:42,160 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:42:42,161 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:42:42,161 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:42:42,162 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:42:42,162 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:42:42,162 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:42:42,163 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:42:42,163 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:42:42,163 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:42:42,164 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:42:42,164 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:42:42,164 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:42:42,165 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:42:42,165 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:42:42,165 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:42:42,166 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:42:42,166 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:42:42,166 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:42:42,167 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:42:42,167 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:42:42,170 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:42:42,170 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:42:42,171 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:42:42,171 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:42:42,171 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:42:42,171 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_68585d2a-d53e-4e92-82fa-9020a5215cf6/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68585d2a-d53e-4e92-82fa-9020a5215cf6/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e4fb36b23f327758af91661b12ca1735faf7949901dbd5c1543c17ea0384ceb9 [2021-11-07 01:42:42,469 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:42:42,490 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:42:42,493 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:42:42,494 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:42:42,495 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:42:42,496 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68585d2a-d53e-4e92-82fa-9020a5215cf6/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec11_product30.cil.c [2021-11-07 01:42:42,571 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68585d2a-d53e-4e92-82fa-9020a5215cf6/bin/utaipan-UUZaoUuFF8/data/f0056d88e/6d587a291dc04780a8d796a705b06659/FLAG015cfee89 [2021-11-07 01:42:43,355 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:42:43,356 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68585d2a-d53e-4e92-82fa-9020a5215cf6/sv-benchmarks/c/product-lines/email_spec11_product30.cil.c [2021-11-07 01:42:43,379 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68585d2a-d53e-4e92-82fa-9020a5215cf6/bin/utaipan-UUZaoUuFF8/data/f0056d88e/6d587a291dc04780a8d796a705b06659/FLAG015cfee89 [2021-11-07 01:42:43,482 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68585d2a-d53e-4e92-82fa-9020a5215cf6/bin/utaipan-UUZaoUuFF8/data/f0056d88e/6d587a291dc04780a8d796a705b06659 [2021-11-07 01:42:43,485 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:42:43,487 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:42:43,489 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:42:43,489 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:42:43,493 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:42:43,495 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:42:43" (1/1) ... [2021-11-07 01:42:43,496 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ba5e1e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:42:43, skipping insertion in model container [2021-11-07 01:42:43,497 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:42:43" (1/1) ... [2021-11-07 01:42:43,506 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:42:43,597 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:42:44,200 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_68585d2a-d53e-4e92-82fa-9020a5215cf6/sv-benchmarks/c/product-lines/email_spec11_product30.cil.c[29507,29520] [2021-11-07 01:42:44,421 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:42:44,444 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-07 01:42:44,445 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@4a98475f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:42:44, skipping insertion in model container [2021-11-07 01:42:44,445 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:42:44,446 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 01:42:44,449 INFO L168 Benchmark]: Toolchain (without parser) took 960.06 ms. Allocated memory is still 102.8 MB. Free memory was 79.9 MB in the beginning and 63.8 MB in the end (delta: 16.1 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. [2021-11-07 01:42:44,451 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 79.7 MB. Free memory is still 59.5 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:42:44,453 INFO L168 Benchmark]: CACSL2BoogieTranslator took 956.98 ms. Allocated memory is still 102.8 MB. Free memory was 79.7 MB in the beginning and 63.8 MB in the end (delta: 15.9 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. [2021-11-07 01:42:44,456 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 79.7 MB. Free memory is still 59.5 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 956.98 ms. Allocated memory is still 102.8 MB. Free memory was 79.7 MB in the beginning and 63.8 MB in the end (delta: 15.9 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 1598]: 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_68585d2a-d53e-4e92-82fa-9020a5215cf6/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68585d2a-d53e-4e92-82fa-9020a5215cf6/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_68585d2a-d53e-4e92-82fa-9020a5215cf6/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68585d2a-d53e-4e92-82fa-9020a5215cf6/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec11_product30.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68585d2a-d53e-4e92-82fa-9020a5215cf6/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_68585d2a-d53e-4e92-82fa-9020a5215cf6/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 e4fb36b23f327758af91661b12ca1735faf7949901dbd5c1543c17ea0384ceb9 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:42:47,228 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:42:47,232 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:42:47,303 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:42:47,304 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:42:47,309 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:42:47,312 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:42:47,317 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:42:47,322 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:42:47,335 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:42:47,337 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:42:47,340 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:42:47,340 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:42:47,344 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:42:47,346 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:42:47,352 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:42:47,354 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:42:47,355 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:42:47,358 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:42:47,368 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:42:47,370 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:42:47,372 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:42:47,375 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:42:47,378 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:42:47,390 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:42:47,391 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:42:47,391 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:42:47,394 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:42:47,394 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:42:47,396 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:42:47,397 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:42:47,398 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:42:47,400 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:42:47,401 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:42:47,403 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:42:47,404 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:42:47,405 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:42:47,424 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:42:47,425 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:42:47,427 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:42:47,428 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:42:47,434 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68585d2a-d53e-4e92-82fa-9020a5215cf6/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-07 01:42:47,490 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:42:47,491 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:42:47,493 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:42:47,493 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:42:47,493 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:42:47,494 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:42:47,494 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:42:47,494 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:42:47,495 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:42:47,497 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:42:47,498 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:42:47,499 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:42:47,499 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:42:47,499 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:42:47,500 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:42:47,500 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:42:47,500 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:42:47,501 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 01:42:47,501 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 01:42:47,501 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:42:47,501 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:42:47,502 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:42:47,502 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:42:47,502 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:42:47,503 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 01:42:47,503 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:42:47,503 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:42:47,504 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:42:47,504 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:42:47,504 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:42:47,505 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 01:42:47,505 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 01:42:47,505 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:42:47,506 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:42:47,506 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:42:47,507 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_68585d2a-d53e-4e92-82fa-9020a5215cf6/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68585d2a-d53e-4e92-82fa-9020a5215cf6/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e4fb36b23f327758af91661b12ca1735faf7949901dbd5c1543c17ea0384ceb9 [2021-11-07 01:42:47,987 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:42:48,022 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:42:48,025 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:42:48,026 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:42:48,027 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:42:48,028 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68585d2a-d53e-4e92-82fa-9020a5215cf6/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec11_product30.cil.c [2021-11-07 01:42:48,087 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68585d2a-d53e-4e92-82fa-9020a5215cf6/bin/utaipan-UUZaoUuFF8/data/e984e4c0f/78b4b9784aa64a61986c31ef747263d9/FLAG7836048ba [2021-11-07 01:42:48,893 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:42:48,894 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68585d2a-d53e-4e92-82fa-9020a5215cf6/sv-benchmarks/c/product-lines/email_spec11_product30.cil.c [2021-11-07 01:42:48,928 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68585d2a-d53e-4e92-82fa-9020a5215cf6/bin/utaipan-UUZaoUuFF8/data/e984e4c0f/78b4b9784aa64a61986c31ef747263d9/FLAG7836048ba [2021-11-07 01:42:49,016 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68585d2a-d53e-4e92-82fa-9020a5215cf6/bin/utaipan-UUZaoUuFF8/data/e984e4c0f/78b4b9784aa64a61986c31ef747263d9 [2021-11-07 01:42:49,020 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:42:49,022 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:42:49,024 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:42:49,025 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:42:49,030 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:42:49,031 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:42:49" (1/1) ... [2021-11-07 01:42:49,032 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4bc4e999 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:42:49, skipping insertion in model container [2021-11-07 01:42:49,033 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:42:49" (1/1) ... [2021-11-07 01:42:49,042 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:42:49,149 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:42:49,894 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_68585d2a-d53e-4e92-82fa-9020a5215cf6/sv-benchmarks/c/product-lines/email_spec11_product30.cil.c[29507,29520] [2021-11-07 01:42:50,106 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:42:50,135 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 01:42:50,158 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:42:50,274 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_68585d2a-d53e-4e92-82fa-9020a5215cf6/sv-benchmarks/c/product-lines/email_spec11_product30.cil.c[29507,29520] [2021-11-07 01:42:50,321 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:42:50,329 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:42:50,410 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_68585d2a-d53e-4e92-82fa-9020a5215cf6/sv-benchmarks/c/product-lines/email_spec11_product30.cil.c[29507,29520] [2021-11-07 01:42:50,499 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:42:50,564 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:42:50,565 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:42:50 WrapperNode [2021-11-07 01:42:50,565 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:42:50,566 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:42:50,566 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:42:50,567 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:42:50,575 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:42:50" (1/1) ... [2021-11-07 01:42:50,622 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:42:50" (1/1) ... [2021-11-07 01:42:50,758 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:42:50,759 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:42:50,759 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:42:50,760 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:42:50,771 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:42:50" (1/1) ... [2021-11-07 01:42:50,771 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:42:50" (1/1) ... [2021-11-07 01:42:50,812 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:42:50" (1/1) ... [2021-11-07 01:42:50,812 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:42:50" (1/1) ... [2021-11-07 01:42:50,865 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:42:50" (1/1) ... [2021-11-07 01:42:50,893 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:42:50" (1/1) ... [2021-11-07 01:42:50,900 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:42:50" (1/1) ... [2021-11-07 01:42:50,916 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:42:50,917 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:42:50,917 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:42:50,918 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:42:50,919 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:42:50" (1/1) ... [2021-11-07 01:42:50,942 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:42:50,955 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68585d2a-d53e-4e92-82fa-9020a5215cf6/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:42:50,970 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68585d2a-d53e-4e92-82fa-9020a5215cf6/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:42:50,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68585d2a-d53e-4e92-82fa-9020a5215cf6/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:42:51,029 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2021-11-07 01:42:51,030 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:42:51,030 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 01:42:51,030 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:42:51,030 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:42:56,260 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:42:56,260 INFO L299 CfgBuilder]: Removed 323 assume(true) statements. [2021-11-07 01:42:56,263 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:42:56 BoogieIcfgContainer [2021-11-07 01:42:56,264 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:42:56,266 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:42:56,266 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:42:56,270 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:42:56,270 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:42:49" (1/3) ... [2021-11-07 01:42:56,271 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@113dad6d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:42:56, skipping insertion in model container [2021-11-07 01:42:56,271 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:42:50" (2/3) ... [2021-11-07 01:42:56,272 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@113dad6d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:42:56, skipping insertion in model container [2021-11-07 01:42:56,272 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:42:56" (3/3) ... [2021-11-07 01:42:56,274 INFO L111 eAbstractionObserver]: Analyzing ICFG email_spec11_product30.cil.c [2021-11-07 01:42:56,280 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:42:56,280 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-07 01:42:56,342 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:42:56,349 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-07 01:42:56,350 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-07 01:42:56,381 INFO L276 IsEmpty]: Start isEmpty. Operand has 501 states, 498 states have (on average 1.7550200803212852) internal successors, (874), 500 states have internal predecessors, (874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:42:56,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-07 01:42:56,399 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:42:56,400 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:42:56,401 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:42:56,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:42:56,408 INFO L85 PathProgramCache]: Analyzing trace with hash -564584514, now seen corresponding path program 1 times [2021-11-07 01:42:56,425 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:42:56,425 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [17451289] [2021-11-07 01:42:56,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:42:56,427 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:42:56,427 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68585d2a-d53e-4e92-82fa-9020a5215cf6/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:42:56,430 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68585d2a-d53e-4e92-82fa-9020a5215cf6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:42:56,442 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68585d2a-d53e-4e92-82fa-9020a5215cf6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 01:42:57,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:42:57,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 523 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-07 01:42:57,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:42:57,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:42:57,339 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:42:57,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:42:57,550 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:42:57,550 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [17451289] [2021-11-07 01:42:57,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [17451289] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:42:57,551 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:42:57,551 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 01:42:57,554 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292917236] [2021-11-07 01:42:57,559 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 01:42:57,560 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:42:57,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 01:42:57,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 01:42:57,580 INFO L87 Difference]: Start difference. First operand has 501 states, 498 states have (on average 1.7550200803212852) internal successors, (874), 500 states have internal predecessors, (874), 0 states have call successors, (0), 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 31.0) internal successors, (62), 2 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:42:57,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:42:57,648 INFO L93 Difference]: Finished difference Result 760 states and 1307 transitions. [2021-11-07 01:42:57,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 01:42:57,650 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 31.0) internal successors, (62), 2 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-11-07 01:42:57,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:42:57,671 INFO L225 Difference]: With dead ends: 760 [2021-11-07 01:42:57,671 INFO L226 Difference]: Without dead ends: 490 [2021-11-07 01:42:57,676 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 01:42:57,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2021-11-07 01:42:57,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 490. [2021-11-07 01:42:57,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 490 states, 488 states have (on average 1.7459016393442623) internal successors, (852), 489 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:42:57,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 852 transitions. [2021-11-07 01:42:57,784 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 852 transitions. Word has length 62 [2021-11-07 01:42:57,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:42:57,785 INFO L470 AbstractCegarLoop]: Abstraction has 490 states and 852 transitions. [2021-11-07 01:42:57,786 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 31.0) internal successors, (62), 2 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:42:57,786 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 852 transitions. [2021-11-07 01:42:57,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-07 01:42:57,798 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:42:57,799 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:42:57,825 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68585d2a-d53e-4e92-82fa-9020a5215cf6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 01:42:58,013 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68585d2a-d53e-4e92-82fa-9020a5215cf6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:42:58,013 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:42:58,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:42:58,014 INFO L85 PathProgramCache]: Analyzing trace with hash 1223481131, now seen corresponding path program 1 times [2021-11-07 01:42:58,016 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:42:58,016 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [71448363] [2021-11-07 01:42:58,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:42:58,016 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:42:58,017 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68585d2a-d53e-4e92-82fa-9020a5215cf6/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:42:58,018 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68585d2a-d53e-4e92-82fa-9020a5215cf6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:42:58,022 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68585d2a-d53e-4e92-82fa-9020a5215cf6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 01:42:58,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:42:58,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 524 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:42:58,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:42:58,824 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:42:58,826 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:42:59,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:42:59,031 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:42:59,031 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [71448363] [2021-11-07 01:42:59,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [71448363] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:42:59,032 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:42:59,032 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:42:59,033 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986224941] [2021-11-07 01:42:59,034 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:42:59,035 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:42:59,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:42:59,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:42:59,042 INFO L87 Difference]: Start difference. First operand 490 states and 852 transitions. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:42:59,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:42:59,201 INFO L93 Difference]: Finished difference Result 1440 states and 2508 transitions. [2021-11-07 01:42:59,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:42:59,202 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-11-07 01:42:59,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:42:59,212 INFO L225 Difference]: With dead ends: 1440 [2021-11-07 01:42:59,213 INFO L226 Difference]: Without dead ends: 965 [2021-11-07 01:42:59,220 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:42:59,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 965 states. [2021-11-07 01:42:59,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 965 to 489. [2021-11-07 01:42:59,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 489 states, 487 states have (on average 1.7392197125256674) internal successors, (847), 488 states have internal predecessors, (847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:42:59,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 489 states to 489 states and 847 transitions. [2021-11-07 01:42:59,286 INFO L78 Accepts]: Start accepts. Automaton has 489 states and 847 transitions. Word has length 63 [2021-11-07 01:42:59,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:42:59,287 INFO L470 AbstractCegarLoop]: Abstraction has 489 states and 847 transitions. [2021-11-07 01:42:59,288 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:42:59,288 INFO L276 IsEmpty]: Start isEmpty. Operand 489 states and 847 transitions. [2021-11-07 01:42:59,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-07 01:42:59,299 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:42:59,299 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:42:59,317 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68585d2a-d53e-4e92-82fa-9020a5215cf6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-11-07 01:42:59,517 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68585d2a-d53e-4e92-82fa-9020a5215cf6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:42:59,518 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:42:59,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:42:59,519 INFO L85 PathProgramCache]: Analyzing trace with hash -1291153391, now seen corresponding path program 1 times [2021-11-07 01:42:59,520 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:42:59,520 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [613974241] [2021-11-07 01:42:59,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:42:59,521 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:42:59,521 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68585d2a-d53e-4e92-82fa-9020a5215cf6/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:42:59,522 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68585d2a-d53e-4e92-82fa-9020a5215cf6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:42:59,526 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68585d2a-d53e-4e92-82fa-9020a5215cf6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 01:43:00,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:43:00,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 526 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:43:00,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:43:00,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:43:00,231 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:43:00,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:43:00,431 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:43:00,431 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [613974241] [2021-11-07 01:43:00,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [613974241] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:43:00,432 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:43:00,432 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:43:00,432 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981585028] [2021-11-07 01:43:00,433 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:43:00,433 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:43:00,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:43:00,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:43:00,435 INFO L87 Difference]: Start difference. First operand 489 states and 847 transitions. Second operand has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:00,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:43:00,752 INFO L93 Difference]: Finished difference Result 1873 states and 3250 transitions. [2021-11-07 01:43:00,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:43:00,753 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-11-07 01:43:00,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:43:00,765 INFO L225 Difference]: With dead ends: 1873 [2021-11-07 01:43:00,765 INFO L226 Difference]: Without dead ends: 1402 [2021-11-07 01:43:00,766 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:43:00,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1402 states. [2021-11-07 01:43:00,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1402 to 488. [2021-11-07 01:43:00,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 488 states, 486 states have (on average 1.7345679012345678) internal successors, (843), 487 states have internal predecessors, (843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:00,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488 states to 488 states and 843 transitions. [2021-11-07 01:43:00,807 INFO L78 Accepts]: Start accepts. Automaton has 488 states and 843 transitions. Word has length 65 [2021-11-07 01:43:00,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:43:00,808 INFO L470 AbstractCegarLoop]: Abstraction has 488 states and 843 transitions. [2021-11-07 01:43:00,808 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:00,808 INFO L276 IsEmpty]: Start isEmpty. Operand 488 states and 843 transitions. [2021-11-07 01:43:00,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-07 01:43:00,810 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:43:00,810 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:43:00,838 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68585d2a-d53e-4e92-82fa-9020a5215cf6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 01:43:01,027 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68585d2a-d53e-4e92-82fa-9020a5215cf6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:43:01,028 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:43:01,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:43:01,029 INFO L85 PathProgramCache]: Analyzing trace with hash 981403236, now seen corresponding path program 1 times [2021-11-07 01:43:01,030 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:43:01,030 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [339231338] [2021-11-07 01:43:01,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:43:01,031 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:43:01,031 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68585d2a-d53e-4e92-82fa-9020a5215cf6/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:43:01,032 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68585d2a-d53e-4e92-82fa-9020a5215cf6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:43:01,035 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68585d2a-d53e-4e92-82fa-9020a5215cf6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 01:43:01,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:43:01,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 527 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:43:01,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:43:01,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:43:01,763 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:43:01,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:43:01,967 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:43:01,968 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [339231338] [2021-11-07 01:43:01,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [339231338] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:43:01,968 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:43:01,969 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:43:01,969 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470689562] [2021-11-07 01:43:01,970 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:43:01,970 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:43:01,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:43:01,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:43:01,973 INFO L87 Difference]: Start difference. First operand 488 states and 843 transitions. Second operand has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:02,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:43:02,100 INFO L93 Difference]: Finished difference Result 973 states and 1683 transitions. [2021-11-07 01:43:02,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:43:02,100 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-11-07 01:43:02,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:43:02,105 INFO L225 Difference]: With dead ends: 973 [2021-11-07 01:43:02,105 INFO L226 Difference]: Without dead ends: 493 [2021-11-07 01:43:02,107 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:43:02,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2021-11-07 01:43:02,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 488. [2021-11-07 01:43:02,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 488 states, 486 states have (on average 1.728395061728395) internal successors, (840), 487 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:02,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488 states to 488 states and 840 transitions. [2021-11-07 01:43:02,147 INFO L78 Accepts]: Start accepts. Automaton has 488 states and 840 transitions. Word has length 66 [2021-11-07 01:43:02,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:43:02,148 INFO L470 AbstractCegarLoop]: Abstraction has 488 states and 840 transitions. [2021-11-07 01:43:02,148 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:02,148 INFO L276 IsEmpty]: Start isEmpty. Operand 488 states and 840 transitions. [2021-11-07 01:43:02,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-07 01:43:02,150 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:43:02,150 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:43:02,173 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68585d2a-d53e-4e92-82fa-9020a5215cf6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 01:43:02,368 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68585d2a-d53e-4e92-82fa-9020a5215cf6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:43:02,369 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:43:02,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:43:02,369 INFO L85 PathProgramCache]: Analyzing trace with hash 1848300793, now seen corresponding path program 1 times [2021-11-07 01:43:02,370 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:43:02,371 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [795228381] [2021-11-07 01:43:02,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:43:02,371 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:43:02,371 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68585d2a-d53e-4e92-82fa-9020a5215cf6/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:43:02,372 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68585d2a-d53e-4e92-82fa-9020a5215cf6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:43:02,383 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68585d2a-d53e-4e92-82fa-9020a5215cf6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 01:43:02,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:43:02,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 528 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:43:02,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:43:03,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:43:03,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:43:03,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:43:03,464 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:43:03,464 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [795228381] [2021-11-07 01:43:03,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [795228381] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:43:03,464 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:43:03,465 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:43:03,465 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306072009] [2021-11-07 01:43:03,466 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:43:03,466 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:43:03,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:43:03,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:43:03,467 INFO L87 Difference]: Start difference. First operand 488 states and 840 transitions. Second operand has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:03,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:43:03,828 INFO L93 Difference]: Finished difference Result 1860 states and 3226 transitions. [2021-11-07 01:43:03,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:43:03,829 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-11-07 01:43:03,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:43:03,841 INFO L225 Difference]: With dead ends: 1860 [2021-11-07 01:43:03,841 INFO L226 Difference]: Without dead ends: 1398 [2021-11-07 01:43:03,843 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 128 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 01:43:03,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1398 states. [2021-11-07 01:43:03,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1398 to 488. [2021-11-07 01:43:03,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 488 states, 486 states have (on average 1.7222222222222223) internal successors, (837), 487 states have internal predecessors, (837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:03,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488 states to 488 states and 837 transitions. [2021-11-07 01:43:03,903 INFO L78 Accepts]: Start accepts. Automaton has 488 states and 837 transitions. Word has length 67 [2021-11-07 01:43:03,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:43:03,904 INFO L470 AbstractCegarLoop]: Abstraction has 488 states and 837 transitions. [2021-11-07 01:43:03,904 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:03,904 INFO L276 IsEmpty]: Start isEmpty. Operand 488 states and 837 transitions. [2021-11-07 01:43:03,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-07 01:43:03,906 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:43:03,907 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 01:43:03,929 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68585d2a-d53e-4e92-82fa-9020a5215cf6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 01:43:04,125 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68585d2a-d53e-4e92-82fa-9020a5215cf6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:43:04,126 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:43:04,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:43:04,126 INFO L85 PathProgramCache]: Analyzing trace with hash -100986188, now seen corresponding path program 1 times [2021-11-07 01:43:04,127 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:43:04,127 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [803440269] [2021-11-07 01:43:04,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:43:04,128 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:43:04,128 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68585d2a-d53e-4e92-82fa-9020a5215cf6/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:43:04,129 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68585d2a-d53e-4e92-82fa-9020a5215cf6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:43:04,133 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68585d2a-d53e-4e92-82fa-9020a5215cf6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 01:43:04,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:43:04,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 530 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:43:04,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:43:05,001 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:43:05,002 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:43:05,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:43:05,206 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:43:05,206 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [803440269] [2021-11-07 01:43:05,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [803440269] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:43:05,206 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:43:05,206 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:43:05,207 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171539183] [2021-11-07 01:43:05,207 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:43:05,208 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:43:05,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:43:05,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:43:05,209 INFO L87 Difference]: Start difference. First operand 488 states and 837 transitions. Second operand has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:05,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:43:05,332 INFO L93 Difference]: Finished difference Result 1198 states and 2058 transitions. [2021-11-07 01:43:05,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:43:05,333 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-11-07 01:43:05,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:43:05,341 INFO L225 Difference]: With dead ends: 1198 [2021-11-07 01:43:05,341 INFO L226 Difference]: Without dead ends: 950 [2021-11-07 01:43:05,343 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 01:43:05,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 950 states. [2021-11-07 01:43:05,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 950 to 702. [2021-11-07 01:43:05,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 702 states, 700 states have (on average 1.7542857142857142) internal successors, (1228), 701 states have internal predecessors, (1228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:05,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 702 states to 702 states and 1228 transitions. [2021-11-07 01:43:05,420 INFO L78 Accepts]: Start accepts. Automaton has 702 states and 1228 transitions. Word has length 69 [2021-11-07 01:43:05,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:43:05,420 INFO L470 AbstractCegarLoop]: Abstraction has 702 states and 1228 transitions. [2021-11-07 01:43:05,421 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:05,421 INFO L276 IsEmpty]: Start isEmpty. Operand 702 states and 1228 transitions. [2021-11-07 01:43:05,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-07 01:43:05,423 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:43:05,424 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] [2021-11-07 01:43:05,443 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68585d2a-d53e-4e92-82fa-9020a5215cf6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 01:43:05,642 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68585d2a-d53e-4e92-82fa-9020a5215cf6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:43:05,643 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:43:05,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:43:05,643 INFO L85 PathProgramCache]: Analyzing trace with hash -1215807355, now seen corresponding path program 1 times [2021-11-07 01:43:05,644 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:43:05,644 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1319530491] [2021-11-07 01:43:05,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:43:05,644 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:43:05,645 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68585d2a-d53e-4e92-82fa-9020a5215cf6/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:43:05,645 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68585d2a-d53e-4e92-82fa-9020a5215cf6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:43:05,648 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68585d2a-d53e-4e92-82fa-9020a5215cf6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 01:43:06,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:43:06,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 542 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:43:06,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:43:06,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:43:06,479 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:43:06,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:43:06,720 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:43:06,720 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1319530491] [2021-11-07 01:43:06,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1319530491] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:43:06,720 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:43:06,720 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:43:06,721 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639676495] [2021-11-07 01:43:06,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:43:06,721 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:43:06,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:43:06,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:43:06,722 INFO L87 Difference]: Start difference. First operand 702 states and 1228 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:06,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:43:06,865 INFO L93 Difference]: Finished difference Result 1730 states and 3032 transitions. [2021-11-07 01:43:06,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:43:06,866 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 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 81 [2021-11-07 01:43:06,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:43:06,875 INFO L225 Difference]: With dead ends: 1730 [2021-11-07 01:43:06,875 INFO L226 Difference]: Without dead ends: 1112 [2021-11-07 01:43:06,877 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:43:06,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1112 states. [2021-11-07 01:43:06,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1112 to 864. [2021-11-07 01:43:06,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 864 states, 862 states have (on average 1.765661252900232) internal successors, (1522), 863 states have internal predecessors, (1522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:06,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 864 states to 864 states and 1522 transitions. [2021-11-07 01:43:06,983 INFO L78 Accepts]: Start accepts. Automaton has 864 states and 1522 transitions. Word has length 81 [2021-11-07 01:43:06,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:43:06,984 INFO L470 AbstractCegarLoop]: Abstraction has 864 states and 1522 transitions. [2021-11-07 01:43:06,984 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:06,985 INFO L276 IsEmpty]: Start isEmpty. Operand 864 states and 1522 transitions. [2021-11-07 01:43:06,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-07 01:43:06,988 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:43:06,988 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] [2021-11-07 01:43:07,015 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68585d2a-d53e-4e92-82fa-9020a5215cf6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2021-11-07 01:43:07,203 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68585d2a-d53e-4e92-82fa-9020a5215cf6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:43:07,204 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:43:07,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:43:07,204 INFO L85 PathProgramCache]: Analyzing trace with hash 918995620, now seen corresponding path program 1 times [2021-11-07 01:43:07,205 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:43:07,205 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [296815724] [2021-11-07 01:43:07,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:43:07,205 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:43:07,206 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68585d2a-d53e-4e92-82fa-9020a5215cf6/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:43:07,207 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68585d2a-d53e-4e92-82fa-9020a5215cf6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:43:07,210 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68585d2a-d53e-4e92-82fa-9020a5215cf6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 01:43:07,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:43:07,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 544 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:43:07,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:43:08,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:43:08,124 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:43:08,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:43:08,368 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:43:08,368 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [296815724] [2021-11-07 01:43:08,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [296815724] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:43:08,368 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:43:08,368 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:43:08,369 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260698501] [2021-11-07 01:43:08,369 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:43:08,370 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:43:08,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:43:08,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:43:08,371 INFO L87 Difference]: Start difference. First operand 864 states and 1522 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:08,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:43:08,516 INFO L93 Difference]: Finished difference Result 2248 states and 3979 transitions. [2021-11-07 01:43:08,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:43:08,517 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 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 82 [2021-11-07 01:43:08,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:43:08,528 INFO L225 Difference]: With dead ends: 2248 [2021-11-07 01:43:08,528 INFO L226 Difference]: Without dead ends: 1476 [2021-11-07 01:43:08,530 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:43:08,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1476 states. [2021-11-07 01:43:08,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1476 to 1228. [2021-11-07 01:43:08,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1228 states, 1226 states have (on average 1.7830342577487766) internal successors, (2186), 1227 states have internal predecessors, (2186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:08,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1228 states to 1228 states and 2186 transitions. [2021-11-07 01:43:08,672 INFO L78 Accepts]: Start accepts. Automaton has 1228 states and 2186 transitions. Word has length 82 [2021-11-07 01:43:08,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:43:08,672 INFO L470 AbstractCegarLoop]: Abstraction has 1228 states and 2186 transitions. [2021-11-07 01:43:08,673 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:08,673 INFO L276 IsEmpty]: Start isEmpty. Operand 1228 states and 2186 transitions. [2021-11-07 01:43:08,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-07 01:43:08,677 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:43:08,677 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] [2021-11-07 01:43:08,700 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68585d2a-d53e-4e92-82fa-9020a5215cf6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 01:43:08,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68585d2a-d53e-4e92-82fa-9020a5215cf6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:43:08,896 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:43:08,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:43:08,896 INFO L85 PathProgramCache]: Analyzing trace with hash -1206158029, now seen corresponding path program 1 times [2021-11-07 01:43:08,897 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:43:08,897 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [101960920] [2021-11-07 01:43:08,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:43:08,897 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:43:08,898 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68585d2a-d53e-4e92-82fa-9020a5215cf6/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:43:08,899 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68585d2a-d53e-4e92-82fa-9020a5215cf6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:43:08,901 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68585d2a-d53e-4e92-82fa-9020a5215cf6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 01:43:09,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:43:09,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 546 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:43:09,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:43:09,889 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 01:43:09,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:43:10,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:43:10,137 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:43:10,137 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [101960920] [2021-11-07 01:43:10,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [101960920] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:43:10,137 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:43:10,138 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:43:10,138 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9562574] [2021-11-07 01:43:10,139 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:43:10,139 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:43:10,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:43:10,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:43:10,140 INFO L87 Difference]: Start difference. First operand 1228 states and 2186 transitions. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:10,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:43:10,384 INFO L93 Difference]: Finished difference Result 3320 states and 5940 transitions. [2021-11-07 01:43:10,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:43:10,385 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 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 83 [2021-11-07 01:43:10,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:43:10,403 INFO L225 Difference]: With dead ends: 3320 [2021-11-07 01:43:10,403 INFO L226 Difference]: Without dead ends: 2192 [2021-11-07 01:43:10,409 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:43:10,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2192 states. [2021-11-07 01:43:10,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2192 to 1944. [2021-11-07 01:43:10,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1944 states, 1942 states have (on average 1.798661174047374) internal successors, (3493), 1943 states have internal predecessors, (3493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:10,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1944 states to 1944 states and 3493 transitions. [2021-11-07 01:43:10,636 INFO L78 Accepts]: Start accepts. Automaton has 1944 states and 3493 transitions. Word has length 83 [2021-11-07 01:43:10,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:43:10,637 INFO L470 AbstractCegarLoop]: Abstraction has 1944 states and 3493 transitions. [2021-11-07 01:43:10,637 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:10,637 INFO L276 IsEmpty]: Start isEmpty. Operand 1944 states and 3493 transitions. [2021-11-07 01:43:10,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-07 01:43:10,643 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:43:10,643 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:43:10,662 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68585d2a-d53e-4e92-82fa-9020a5215cf6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 01:43:10,859 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68585d2a-d53e-4e92-82fa-9020a5215cf6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:43:10,859 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:43:10,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:43:10,860 INFO L85 PathProgramCache]: Analyzing trace with hash 1968536243, now seen corresponding path program 1 times [2021-11-07 01:43:10,860 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:43:10,861 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1432743633] [2021-11-07 01:43:10,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:43:10,861 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:43:10,861 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68585d2a-d53e-4e92-82fa-9020a5215cf6/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:43:10,863 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68585d2a-d53e-4e92-82fa-9020a5215cf6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:43:10,866 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68585d2a-d53e-4e92-82fa-9020a5215cf6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 01:43:11,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:43:11,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 548 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:43:11,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:43:11,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:43:11,784 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:43:12,043 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:43:12,043 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:43:12,043 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1432743633] [2021-11-07 01:43:12,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1432743633] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:43:12,044 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:43:12,044 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:43:12,044 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944720677] [2021-11-07 01:43:12,045 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:43:12,045 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:43:12,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:43:12,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:43:12,046 INFO L87 Difference]: Start difference. First operand 1944 states and 3493 transitions. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:12,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:43:12,413 INFO L93 Difference]: Finished difference Result 5204 states and 9380 transitions. [2021-11-07 01:43:12,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:43:12,414 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2021-11-07 01:43:12,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:43:12,445 INFO L225 Difference]: With dead ends: 5204 [2021-11-07 01:43:12,445 INFO L226 Difference]: Without dead ends: 3394 [2021-11-07 01:43:12,449 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:43:12,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3394 states. [2021-11-07 01:43:12,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3394 to 3146. [2021-11-07 01:43:12,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3146 states, 3144 states have (on average 1.8072519083969465) internal successors, (5682), 3145 states have internal predecessors, (5682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:12,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3146 states to 3146 states and 5682 transitions. [2021-11-07 01:43:12,856 INFO L78 Accepts]: Start accepts. Automaton has 3146 states and 5682 transitions. Word has length 84 [2021-11-07 01:43:12,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:43:12,857 INFO L470 AbstractCegarLoop]: Abstraction has 3146 states and 5682 transitions. [2021-11-07 01:43:12,857 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:12,857 INFO L276 IsEmpty]: Start isEmpty. Operand 3146 states and 5682 transitions. [2021-11-07 01:43:12,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-07 01:43:12,865 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:43:12,866 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:43:12,890 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68585d2a-d53e-4e92-82fa-9020a5215cf6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 01:43:13,086 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68585d2a-d53e-4e92-82fa-9020a5215cf6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:43:13,086 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:43:13,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:43:13,087 INFO L85 PathProgramCache]: Analyzing trace with hash -1160329948, now seen corresponding path program 1 times [2021-11-07 01:43:13,087 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:43:13,088 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1253929177] [2021-11-07 01:43:13,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:43:13,088 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:43:13,088 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68585d2a-d53e-4e92-82fa-9020a5215cf6/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:43:13,089 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68585d2a-d53e-4e92-82fa-9020a5215cf6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:43:13,090 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68585d2a-d53e-4e92-82fa-9020a5215cf6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 01:43:13,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:43:13,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 550 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:43:13,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:43:14,073 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:43:14,073 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:43:14,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:43:14,347 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:43:14,347 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1253929177] [2021-11-07 01:43:14,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1253929177] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:43:14,348 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:43:14,348 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:43:14,348 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643329568] [2021-11-07 01:43:14,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:43:14,349 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:43:14,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:43:14,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:43:14,351 INFO L87 Difference]: Start difference. First operand 3146 states and 5682 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:14,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:43:14,832 INFO L93 Difference]: Finished difference Result 8526 states and 15430 transitions. [2021-11-07 01:43:14,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:43:14,833 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-11-07 01:43:14,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:43:14,877 INFO L225 Difference]: With dead ends: 8526 [2021-11-07 01:43:14,877 INFO L226 Difference]: Without dead ends: 5548 [2021-11-07 01:43:14,883 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:43:14,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5548 states. [2021-11-07 01:43:15,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5548 to 5300. [2021-11-07 01:43:15,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5300 states, 5298 states have (on average 1.811060777651944) internal successors, (9595), 5299 states have internal predecessors, (9595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:15,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5300 states to 5300 states and 9595 transitions. [2021-11-07 01:43:15,372 INFO L78 Accepts]: Start accepts. Automaton has 5300 states and 9595 transitions. Word has length 85 [2021-11-07 01:43:15,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:43:15,374 INFO L470 AbstractCegarLoop]: Abstraction has 5300 states and 9595 transitions. [2021-11-07 01:43:15,374 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:15,375 INFO L276 IsEmpty]: Start isEmpty. Operand 5300 states and 9595 transitions. [2021-11-07 01:43:15,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-07 01:43:15,391 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:43:15,391 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:43:15,416 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68585d2a-d53e-4e92-82fa-9020a5215cf6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 01:43:15,607 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68585d2a-d53e-4e92-82fa-9020a5215cf6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:43:15,608 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:43:15,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:43:15,608 INFO L85 PathProgramCache]: Analyzing trace with hash -1882986108, now seen corresponding path program 1 times [2021-11-07 01:43:15,609 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:43:15,609 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [126933638] [2021-11-07 01:43:15,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:43:15,610 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:43:15,610 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68585d2a-d53e-4e92-82fa-9020a5215cf6/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:43:15,611 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68585d2a-d53e-4e92-82fa-9020a5215cf6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:43:15,639 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68585d2a-d53e-4e92-82fa-9020a5215cf6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 01:43:16,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:43:16,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 552 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:43:16,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:43:16,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:43:16,623 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:43:16,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:43:16,865 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:43:16,866 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [126933638] [2021-11-07 01:43:16,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [126933638] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:43:16,866 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:43:16,866 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:43:16,866 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998393522] [2021-11-07 01:43:16,867 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:43:16,867 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:43:16,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:43:16,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:43:16,869 INFO L87 Difference]: Start difference. First operand 5300 states and 9595 transitions. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:17,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:43:17,604 INFO L93 Difference]: Finished difference Result 15446 states and 28011 transitions. [2021-11-07 01:43:17,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:43:17,604 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2021-11-07 01:43:17,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:43:17,671 INFO L225 Difference]: With dead ends: 15446 [2021-11-07 01:43:17,671 INFO L226 Difference]: Without dead ends: 10318 [2021-11-07 01:43:17,681 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:43:17,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10318 states. [2021-11-07 01:43:18,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10318 to 10070. [2021-11-07 01:43:18,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10070 states, 10068 states have (on average 1.8128724672228844) internal successors, (18252), 10069 states have internal predecessors, (18252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:18,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10070 states to 10070 states and 18252 transitions. [2021-11-07 01:43:18,619 INFO L78 Accepts]: Start accepts. Automaton has 10070 states and 18252 transitions. Word has length 86 [2021-11-07 01:43:18,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:43:18,620 INFO L470 AbstractCegarLoop]: Abstraction has 10070 states and 18252 transitions. [2021-11-07 01:43:18,621 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:18,621 INFO L276 IsEmpty]: Start isEmpty. Operand 10070 states and 18252 transitions. [2021-11-07 01:43:18,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-07 01:43:18,641 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:43:18,641 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] [2021-11-07 01:43:18,667 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68585d2a-d53e-4e92-82fa-9020a5215cf6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-07 01:43:18,867 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68585d2a-d53e-4e92-82fa-9020a5215cf6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:43:18,868 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:43:18,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:43:18,868 INFO L85 PathProgramCache]: Analyzing trace with hash -462794412, now seen corresponding path program 1 times [2021-11-07 01:43:18,869 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:43:18,869 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [362846359] [2021-11-07 01:43:18,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:43:18,870 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:43:18,870 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68585d2a-d53e-4e92-82fa-9020a5215cf6/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:43:18,871 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68585d2a-d53e-4e92-82fa-9020a5215cf6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:43:18,883 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68585d2a-d53e-4e92-82fa-9020a5215cf6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 01:43:19,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:43:19,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 562 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:43:19,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:43:20,059 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 01:43:20,059 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:43:20,341 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 01:43:20,341 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:43:20,341 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [362846359] [2021-11-07 01:43:20,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [362846359] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:43:20,342 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:43:20,342 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:43:20,343 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759914983] [2021-11-07 01:43:20,343 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:43:20,344 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:43:20,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:43:20,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:43:20,345 INFO L87 Difference]: Start difference. First operand 10070 states and 18252 transitions. Second operand has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:23,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:43:23,769 INFO L93 Difference]: Finished difference Result 24841 states and 45035 transitions. [2021-11-07 01:43:23,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:43:23,770 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 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 01:43:23,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:43:23,828 INFO L225 Difference]: With dead ends: 24841 [2021-11-07 01:43:23,828 INFO L226 Difference]: Without dead ends: 15021 [2021-11-07 01:43:23,847 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 168 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 01:43:23,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15021 states. [2021-11-07 01:43:24,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15021 to 10037. [2021-11-07 01:43:24,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10037 states, 10035 states have (on average 1.805680119581465) internal successors, (18120), 10036 states have internal predecessors, (18120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:24,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10037 states to 10037 states and 18120 transitions. [2021-11-07 01:43:24,712 INFO L78 Accepts]: Start accepts. Automaton has 10037 states and 18120 transitions. Word has length 87 [2021-11-07 01:43:24,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:43:24,713 INFO L470 AbstractCegarLoop]: Abstraction has 10037 states and 18120 transitions. [2021-11-07 01:43:24,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:24,713 INFO L276 IsEmpty]: Start isEmpty. Operand 10037 states and 18120 transitions. [2021-11-07 01:43:24,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-07 01:43:24,736 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:43:24,736 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 01:43:24,761 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68585d2a-d53e-4e92-82fa-9020a5215cf6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-07 01:43:24,955 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68585d2a-d53e-4e92-82fa-9020a5215cf6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:43:24,956 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:43:24,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:43:24,956 INFO L85 PathProgramCache]: Analyzing trace with hash 1403442771, now seen corresponding path program 1 times [2021-11-07 01:43:24,957 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:43:24,957 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1324527864] [2021-11-07 01:43:24,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:43:24,958 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:43:24,958 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68585d2a-d53e-4e92-82fa-9020a5215cf6/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:43:24,960 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68585d2a-d53e-4e92-82fa-9020a5215cf6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:43:25,003 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68585d2a-d53e-4e92-82fa-9020a5215cf6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 01:43:26,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:43:26,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 554 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:43:26,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:43:26,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:43:26,323 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:43:26,602 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:43:26,602 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:43:26,602 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1324527864] [2021-11-07 01:43:26,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1324527864] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:43:26,603 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:43:26,603 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:43:26,603 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425259897] [2021-11-07 01:43:26,604 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:43:26,604 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:43:26,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:43:26,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:43:26,605 INFO L87 Difference]: Start difference. First operand 10037 states and 18120 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 01:43:27,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:43:27,684 INFO L93 Difference]: Finished difference Result 29361 states and 53069 transitions. [2021-11-07 01:43:27,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:43:27,684 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 01:43:27,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:43:27,754 INFO L225 Difference]: With dead ends: 29361 [2021-11-07 01:43:27,754 INFO L226 Difference]: Without dead ends: 19503 [2021-11-07 01:43:27,771 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 01:43:27,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19503 states. [2021-11-07 01:43:29,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19503 to 19255. [2021-11-07 01:43:29,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19255 states, 19253 states have (on average 1.805484859502415) internal successors, (34761), 19254 states have internal predecessors, (34761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:29,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19255 states to 19255 states and 34761 transitions. [2021-11-07 01:43:29,324 INFO L78 Accepts]: Start accepts. Automaton has 19255 states and 34761 transitions. Word has length 87 [2021-11-07 01:43:29,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:43:29,324 INFO L470 AbstractCegarLoop]: Abstraction has 19255 states and 34761 transitions. [2021-11-07 01:43:29,325 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 01:43:29,325 INFO L276 IsEmpty]: Start isEmpty. Operand 19255 states and 34761 transitions. [2021-11-07 01:43:29,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-07 01:43:29,372 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:43:29,373 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 01:43:29,394 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68585d2a-d53e-4e92-82fa-9020a5215cf6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-07 01:43:29,593 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68585d2a-d53e-4e92-82fa-9020a5215cf6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:43:29,594 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:43:29,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:43:29,594 INFO L85 PathProgramCache]: Analyzing trace with hash -388889402, now seen corresponding path program 1 times [2021-11-07 01:43:29,595 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:43:29,595 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1050977131] [2021-11-07 01:43:29,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:43:29,596 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:43:29,596 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68585d2a-d53e-4e92-82fa-9020a5215cf6/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:43:29,598 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68585d2a-d53e-4e92-82fa-9020a5215cf6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:43:29,639 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68585d2a-d53e-4e92-82fa-9020a5215cf6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 01:43:30,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:43:30,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 556 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:43:30,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:43:30,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:43:30,804 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:43:31,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:43:31,028 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:43:31,028 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1050977131] [2021-11-07 01:43:31,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1050977131] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:43:31,028 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:43:31,028 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:43:31,028 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446129534] [2021-11-07 01:43:31,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:43:31,029 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:43:31,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:43:31,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:43:31,031 INFO L87 Difference]: Start difference. First operand 19255 states and 34761 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 01:43:32,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:43:32,880 INFO L93 Difference]: Finished difference Result 57201 states and 103306 transitions. [2021-11-07 01:43:32,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:43:32,881 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 01:43:32,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:43:32,992 INFO L225 Difference]: With dead ends: 57201 [2021-11-07 01:43:32,993 INFO L226 Difference]: Without dead ends: 38129 [2021-11-07 01:43:33,025 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 01:43:33,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38129 states. [2021-11-07 01:43:35,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38129 to 37881. [2021-11-07 01:43:35,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37881 states, 37879 states have (on average 1.8030571028802238) internal successors, (68298), 37880 states have internal predecessors, (68298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:35,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37881 states to 37881 states and 68298 transitions. [2021-11-07 01:43:35,627 INFO L78 Accepts]: Start accepts. Automaton has 37881 states and 68298 transitions. Word has length 88 [2021-11-07 01:43:35,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:43:35,628 INFO L470 AbstractCegarLoop]: Abstraction has 37881 states and 68298 transitions. [2021-11-07 01:43:35,628 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 01:43:35,628 INFO L276 IsEmpty]: Start isEmpty. Operand 37881 states and 68298 transitions. [2021-11-07 01:43:35,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-07 01:43:35,658 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:43:35,659 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:43:35,680 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68585d2a-d53e-4e92-82fa-9020a5215cf6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2021-11-07 01:43:35,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68585d2a-d53e-4e92-82fa-9020a5215cf6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:43:35,876 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:43:35,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:43:35,876 INFO L85 PathProgramCache]: Analyzing trace with hash -1432968038, now seen corresponding path program 1 times [2021-11-07 01:43:35,877 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:43:35,877 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1907217129] [2021-11-07 01:43:35,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:43:35,877 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:43:35,877 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68585d2a-d53e-4e92-82fa-9020a5215cf6/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:43:35,880 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68585d2a-d53e-4e92-82fa-9020a5215cf6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:43:35,881 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68585d2a-d53e-4e92-82fa-9020a5215cf6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-07 01:43:36,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:43:36,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 564 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:43:36,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:43:37,138 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:43:37,138 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:43:37,441 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:43:37,441 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:43:37,441 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1907217129] [2021-11-07 01:43:37,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1907217129] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:43:37,441 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:43:37,441 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:43:37,442 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361406031] [2021-11-07 01:43:37,442 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:43:37,442 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:43:37,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:43:37,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:43:37,444 INFO L87 Difference]: Start difference. First operand 37881 states and 68298 transitions. Second operand has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:44,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:43:44,480 INFO L93 Difference]: Finished difference Result 146933 states and 264760 transitions. [2021-11-07 01:43:44,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 01:43:44,481 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 0 states have call successors, (0), 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 01:43:44,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:43:44,804 INFO L225 Difference]: With dead ends: 146933 [2021-11-07 01:43:44,804 INFO L226 Difference]: Without dead ends: 109301 [2021-11-07 01:43:44,872 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:43:45,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109301 states. [2021-11-07 01:43:48,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109301 to 37623. [2021-11-07 01:43:48,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37623 states, 37621 states have (on average 1.7879907498471599) internal successors, (67266), 37622 states have internal predecessors, (67266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:48,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37623 states to 37623 states and 67266 transitions. [2021-11-07 01:43:48,220 INFO L78 Accepts]: Start accepts. Automaton has 37623 states and 67266 transitions. Word has length 89 [2021-11-07 01:43:48,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:43:48,221 INFO L470 AbstractCegarLoop]: Abstraction has 37623 states and 67266 transitions. [2021-11-07 01:43:48,221 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:48,221 INFO L276 IsEmpty]: Start isEmpty. Operand 37623 states and 67266 transitions. [2021-11-07 01:43:48,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-07 01:43:48,242 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:43:48,242 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] [2021-11-07 01:43:48,256 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68585d2a-d53e-4e92-82fa-9020a5215cf6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Ended with exit code 0 [2021-11-07 01:43:48,443 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68585d2a-d53e-4e92-82fa-9020a5215cf6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:43:48,443 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:43:48,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:43:48,444 INFO L85 PathProgramCache]: Analyzing trace with hash -131150408, now seen corresponding path program 1 times [2021-11-07 01:43:48,444 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:43:48,445 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2092640945] [2021-11-07 01:43:48,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:43:48,445 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:43:48,445 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68585d2a-d53e-4e92-82fa-9020a5215cf6/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:43:48,446 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68585d2a-d53e-4e92-82fa-9020a5215cf6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:43:48,448 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68585d2a-d53e-4e92-82fa-9020a5215cf6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 01:43:49,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:43:49,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 564 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:43:49,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:43:49,568 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:43:49,569 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:43:49,810 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:43:49,810 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:43:49,811 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2092640945] [2021-11-07 01:43:49,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2092640945] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:43:49,811 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:43:49,811 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:43:49,811 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758125056] [2021-11-07 01:43:49,812 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:43:49,812 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:43:49,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:43:49,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:43:49,813 INFO L87 Difference]: Start difference. First operand 37623 states and 67266 transitions. Second operand has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:51,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:43:51,908 INFO L93 Difference]: Finished difference Result 75239 states and 134526 transitions. [2021-11-07 01:43:51,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:43:51,909 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 89 [2021-11-07 01:43:51,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:43:52,110 INFO L225 Difference]: With dead ends: 75239 [2021-11-07 01:43:52,110 INFO L226 Difference]: Without dead ends: 37871 [2021-11-07 01:43:52,134 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:43:52,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37871 states. [2021-11-07 01:43:54,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37871 to 37623. [2021-11-07 01:43:54,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37623 states, 37621 states have (on average 1.7845883947795114) internal successors, (67138), 37622 states have internal predecessors, (67138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:54,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37623 states to 37623 states and 67138 transitions. [2021-11-07 01:43:54,487 INFO L78 Accepts]: Start accepts. Automaton has 37623 states and 67138 transitions. Word has length 89 [2021-11-07 01:43:54,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:43:54,487 INFO L470 AbstractCegarLoop]: Abstraction has 37623 states and 67138 transitions. [2021-11-07 01:43:54,487 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:54,487 INFO L276 IsEmpty]: Start isEmpty. Operand 37623 states and 67138 transitions. [2021-11-07 01:43:54,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-07 01:43:54,506 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:43:54,506 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 01:43:54,519 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68585d2a-d53e-4e92-82fa-9020a5215cf6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-07 01:43:54,706 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68585d2a-d53e-4e92-82fa-9020a5215cf6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:43:54,707 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:43:54,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:43:54,707 INFO L85 PathProgramCache]: Analyzing trace with hash 540374821, now seen corresponding path program 1 times [2021-11-07 01:43:54,708 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:43:54,708 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1631426341] [2021-11-07 01:43:54,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:43:54,708 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:43:54,708 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68585d2a-d53e-4e92-82fa-9020a5215cf6/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:43:54,709 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68585d2a-d53e-4e92-82fa-9020a5215cf6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:43:54,711 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68585d2a-d53e-4e92-82fa-9020a5215cf6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-07 01:43:55,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:43:55,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 558 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:43:55,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:43:55,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:43:55,849 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:43:56,072 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:43:56,072 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:43:56,073 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1631426341] [2021-11-07 01:43:56,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1631426341] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:43:56,073 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:43:56,073 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:43:56,075 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671763212] [2021-11-07 01:43:56,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:43:56,076 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:43:56,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:43:56,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:43:56,077 INFO L87 Difference]: Start difference. First operand 37623 states and 67138 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 01:43:59,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:43:59,662 INFO L93 Difference]: Finished difference Result 104465 states and 186056 transitions. [2021-11-07 01:43:59,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:43:59,663 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 01:43:59,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:43:59,781 INFO L225 Difference]: With dead ends: 104465 [2021-11-07 01:43:59,781 INFO L226 Difference]: Without dead ends: 67057 [2021-11-07 01:43:59,807 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 01:43:59,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67057 states. [2021-11-07 01:44:03,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67057 to 66809. [2021-11-07 01:44:03,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66809 states, 66807 states have (on average 1.7751882287784215) internal successors, (118595), 66808 states have internal predecessors, (118595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:04,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66809 states to 66809 states and 118595 transitions. [2021-11-07 01:44:04,081 INFO L78 Accepts]: Start accepts. Automaton has 66809 states and 118595 transitions. Word has length 89 [2021-11-07 01:44:04,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:44:04,081 INFO L470 AbstractCegarLoop]: Abstraction has 66809 states and 118595 transitions. [2021-11-07 01:44:04,081 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 01:44:04,082 INFO L276 IsEmpty]: Start isEmpty. Operand 66809 states and 118595 transitions. [2021-11-07 01:44:04,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-11-07 01:44:04,097 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:44:04,097 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:44:04,112 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68585d2a-d53e-4e92-82fa-9020a5215cf6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-07 01:44:04,298 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68585d2a-d53e-4e92-82fa-9020a5215cf6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:44:04,298 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:44:04,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:44:04,298 INFO L85 PathProgramCache]: Analyzing trace with hash -2042476290, now seen corresponding path program 1 times [2021-11-07 01:44:04,299 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:44:04,299 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1421545910] [2021-11-07 01:44:04,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:44:04,299 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:44:04,300 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68585d2a-d53e-4e92-82fa-9020a5215cf6/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:44:04,300 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68585d2a-d53e-4e92-82fa-9020a5215cf6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:44:04,306 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68585d2a-d53e-4e92-82fa-9020a5215cf6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-07 01:44:05,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:44:05,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 565 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:44:05,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:44:05,550 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 01:44:05,550 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:44:05,885 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 01:44:05,885 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:44:05,885 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1421545910] [2021-11-07 01:44:05,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1421545910] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:44:05,885 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1275189163] [2021-11-07 01:44:05,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:44:05,886 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:44:05,886 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68585d2a-d53e-4e92-82fa-9020a5215cf6/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:44:05,891 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68585d2a-d53e-4e92-82fa-9020a5215cf6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:44:05,909 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68585d2a-d53e-4e92-82fa-9020a5215cf6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2021-11-07 01:44:07,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:44:07,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 565 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:44:07,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:44:07,600 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 01:44:07,601 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:44:08,025 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 01:44:08,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1275189163] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:44:08,025 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:44:08,025 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [5, 5] total 16 [2021-11-07 01:44:08,026 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417701696] [2021-11-07 01:44:08,026 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-07 01:44:08,026 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:44:08,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-07 01:44:08,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-11-07 01:44:08,027 INFO L87 Difference]: Start difference. First operand 66809 states and 118595 transitions. Second operand has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)