./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/email_spec1_product34.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_1072efaa-80a8-4f24-b3b2-29428fd8edfb/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072efaa-80a8-4f24-b3b2-29428fd8edfb/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_1072efaa-80a8-4f24-b3b2-29428fd8edfb/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072efaa-80a8-4f24-b3b2-29428fd8edfb/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec1_product34.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072efaa-80a8-4f24-b3b2-29428fd8edfb/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_1072efaa-80a8-4f24-b3b2-29428fd8edfb/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 76fb98768a82c6e881c4461160153969b956a6a73a8217d33a39b93921ba72b5 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 02:05:07,153 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 02:05:07,156 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 02:05:07,217 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 02:05:07,218 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 02:05:07,222 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 02:05:07,224 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 02:05:07,228 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 02:05:07,230 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 02:05:07,236 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 02:05:07,237 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 02:05:07,239 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 02:05:07,239 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 02:05:07,242 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 02:05:07,244 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 02:05:07,252 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 02:05:07,254 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 02:05:07,255 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 02:05:07,257 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 02:05:07,266 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 02:05:07,268 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 02:05:07,270 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 02:05:07,273 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 02:05:07,274 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 02:05:07,284 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 02:05:07,284 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 02:05:07,284 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 02:05:07,287 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 02:05:07,287 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 02:05:07,289 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 02:05:07,289 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 02:05:07,290 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 02:05:07,293 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 02:05:07,294 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 02:05:07,296 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 02:05:07,296 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 02:05:07,297 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 02:05:07,297 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 02:05:07,297 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 02:05:07,298 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 02:05:07,299 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 02:05:07,300 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072efaa-80a8-4f24-b3b2-29428fd8edfb/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 02:05:07,327 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 02:05:07,327 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 02:05:07,328 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 02:05:07,328 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 02:05:07,329 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 02:05:07,329 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 02:05:07,329 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 02:05:07,329 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 02:05:07,330 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 02:05:07,330 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 02:05:07,330 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 02:05:07,330 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 02:05:07,330 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 02:05:07,331 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 02:05:07,331 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 02:05:07,332 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 02:05:07,332 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 02:05:07,332 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 02:05:07,332 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 02:05:07,333 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 02:05:07,333 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 02:05:07,333 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 02:05:07,333 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 02:05:07,333 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 02:05:07,334 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 02:05:07,334 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 02:05:07,334 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 02:05:07,334 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 02:05:07,335 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 02:05:07,335 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 02:05:07,335 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:05:07,335 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 02:05:07,336 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 02:05:07,336 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 02:05:07,336 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 02:05:07,336 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 02:05:07,336 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 02:05:07,337 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 02:05:07,337 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 02:05:07,337 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_1072efaa-80a8-4f24-b3b2-29428fd8edfb/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072efaa-80a8-4f24-b3b2-29428fd8edfb/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 76fb98768a82c6e881c4461160153969b956a6a73a8217d33a39b93921ba72b5 [2021-11-07 02:05:07,659 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 02:05:07,702 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 02:05:07,706 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 02:05:07,707 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 02:05:07,708 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 02:05:07,709 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072efaa-80a8-4f24-b3b2-29428fd8edfb/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec1_product34.cil.c [2021-11-07 02:05:07,786 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072efaa-80a8-4f24-b3b2-29428fd8edfb/bin/utaipan-UUZaoUuFF8/data/1af3e28f2/a5ee338cbba94262ae91eaabc8178c66/FLAG0cf85cfe1 [2021-11-07 02:05:08,583 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 02:05:08,584 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072efaa-80a8-4f24-b3b2-29428fd8edfb/sv-benchmarks/c/product-lines/email_spec1_product34.cil.c [2021-11-07 02:05:08,605 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072efaa-80a8-4f24-b3b2-29428fd8edfb/bin/utaipan-UUZaoUuFF8/data/1af3e28f2/a5ee338cbba94262ae91eaabc8178c66/FLAG0cf85cfe1 [2021-11-07 02:05:08,733 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072efaa-80a8-4f24-b3b2-29428fd8edfb/bin/utaipan-UUZaoUuFF8/data/1af3e28f2/a5ee338cbba94262ae91eaabc8178c66 [2021-11-07 02:05:08,737 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 02:05:08,738 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 02:05:08,740 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 02:05:08,740 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 02:05:08,749 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 02:05:08,750 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:05:08" (1/1) ... [2021-11-07 02:05:08,751 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4cd3844 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:05:08, skipping insertion in model container [2021-11-07 02:05:08,751 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:05:08" (1/1) ... [2021-11-07 02:05:08,760 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 02:05:08,835 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:05:09,058 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_1072efaa-80a8-4f24-b3b2-29428fd8edfb/sv-benchmarks/c/product-lines/email_spec1_product34.cil.c[2480,2493] [2021-11-07 02:05:09,502 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:05:09,523 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 02:05:09,524 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@50e1e397 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:05:09, skipping insertion in model container [2021-11-07 02:05:09,524 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 02:05:09,524 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 02:05:09,526 INFO L168 Benchmark]: Toolchain (without parser) took 786.96 ms. Allocated memory is still 113.2 MB. Free memory was 69.7 MB in the beginning and 75.3 MB in the end (delta: -5.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-11-07 02:05:09,527 INFO L168 Benchmark]: CDTParser took 0.67 ms. Allocated memory is still 113.2 MB. Free memory was 89.4 MB in the beginning and 89.3 MB in the end (delta: 121.0 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-11-07 02:05:09,528 INFO L168 Benchmark]: CACSL2BoogieTranslator took 784.29 ms. Allocated memory is still 113.2 MB. Free memory was 69.5 MB in the beginning and 75.3 MB in the end (delta: -5.8 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-11-07 02:05:09,530 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.67 ms. Allocated memory is still 113.2 MB. Free memory was 89.4 MB in the beginning and 89.3 MB in the end (delta: 121.0 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 784.29 ms. Allocated memory is still 113.2 MB. Free memory was 69.5 MB in the beginning and 75.3 MB in the end (delta: -5.8 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 146]: 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_1072efaa-80a8-4f24-b3b2-29428fd8edfb/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072efaa-80a8-4f24-b3b2-29428fd8edfb/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_1072efaa-80a8-4f24-b3b2-29428fd8edfb/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072efaa-80a8-4f24-b3b2-29428fd8edfb/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec1_product34.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072efaa-80a8-4f24-b3b2-29428fd8edfb/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_1072efaa-80a8-4f24-b3b2-29428fd8edfb/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 76fb98768a82c6e881c4461160153969b956a6a73a8217d33a39b93921ba72b5 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 02:05:12,051 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 02:05:12,056 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 02:05:12,116 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 02:05:12,117 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 02:05:12,122 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 02:05:12,125 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 02:05:12,130 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 02:05:12,134 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 02:05:12,142 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 02:05:12,143 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 02:05:12,145 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 02:05:12,146 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 02:05:12,147 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 02:05:12,149 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 02:05:12,150 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 02:05:12,151 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 02:05:12,152 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 02:05:12,155 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 02:05:12,157 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 02:05:12,159 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 02:05:12,161 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 02:05:12,162 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 02:05:12,163 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 02:05:12,168 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 02:05:12,168 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 02:05:12,168 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 02:05:12,170 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 02:05:12,171 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 02:05:12,172 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 02:05:12,172 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 02:05:12,174 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 02:05:12,175 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 02:05:12,176 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 02:05:12,178 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 02:05:12,178 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 02:05:12,179 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 02:05:12,179 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 02:05:12,180 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 02:05:12,181 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 02:05:12,182 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 02:05:12,187 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072efaa-80a8-4f24-b3b2-29428fd8edfb/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-07 02:05:12,240 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 02:05:12,241 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 02:05:12,243 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 02:05:12,244 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 02:05:12,244 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 02:05:12,244 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 02:05:12,244 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 02:05:12,245 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 02:05:12,246 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 02:05:12,248 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 02:05:12,249 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 02:05:12,250 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 02:05:12,250 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 02:05:12,250 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 02:05:12,250 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 02:05:12,251 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 02:05:12,251 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 02:05:12,251 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 02:05:12,251 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 02:05:12,252 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 02:05:12,252 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 02:05:12,252 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 02:05:12,252 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 02:05:12,253 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 02:05:12,253 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 02:05:12,253 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 02:05:12,254 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:05:12,254 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 02:05:12,254 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 02:05:12,254 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 02:05:12,255 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 02:05:12,255 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 02:05:12,255 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 02:05:12,255 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 02:05:12,256 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 02:05:12,256 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_1072efaa-80a8-4f24-b3b2-29428fd8edfb/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072efaa-80a8-4f24-b3b2-29428fd8edfb/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 76fb98768a82c6e881c4461160153969b956a6a73a8217d33a39b93921ba72b5 [2021-11-07 02:05:12,718 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 02:05:12,741 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 02:05:12,745 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 02:05:12,746 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 02:05:12,747 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 02:05:12,748 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072efaa-80a8-4f24-b3b2-29428fd8edfb/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec1_product34.cil.c [2021-11-07 02:05:12,829 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072efaa-80a8-4f24-b3b2-29428fd8edfb/bin/utaipan-UUZaoUuFF8/data/7b983a2d8/413472487fc546d995f49094275fcc17/FLAGb6d7ac484 [2021-11-07 02:05:13,645 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 02:05:13,646 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072efaa-80a8-4f24-b3b2-29428fd8edfb/sv-benchmarks/c/product-lines/email_spec1_product34.cil.c [2021-11-07 02:05:13,670 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072efaa-80a8-4f24-b3b2-29428fd8edfb/bin/utaipan-UUZaoUuFF8/data/7b983a2d8/413472487fc546d995f49094275fcc17/FLAGb6d7ac484 [2021-11-07 02:05:13,761 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072efaa-80a8-4f24-b3b2-29428fd8edfb/bin/utaipan-UUZaoUuFF8/data/7b983a2d8/413472487fc546d995f49094275fcc17 [2021-11-07 02:05:13,764 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 02:05:13,765 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 02:05:13,766 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 02:05:13,767 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 02:05:13,771 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 02:05:13,772 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:05:13" (1/1) ... [2021-11-07 02:05:13,774 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5de99787 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:05:13, skipping insertion in model container [2021-11-07 02:05:13,774 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:05:13" (1/1) ... [2021-11-07 02:05:13,783 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 02:05:13,881 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:05:14,100 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_1072efaa-80a8-4f24-b3b2-29428fd8edfb/sv-benchmarks/c/product-lines/email_spec1_product34.cil.c[2480,2493] [2021-11-07 02:05:14,580 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:05:14,598 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 02:05:14,617 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:05:14,623 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_1072efaa-80a8-4f24-b3b2-29428fd8edfb/sv-benchmarks/c/product-lines/email_spec1_product34.cil.c[2480,2493] [2021-11-07 02:05:14,754 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:05:14,762 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 02:05:14,778 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_1072efaa-80a8-4f24-b3b2-29428fd8edfb/sv-benchmarks/c/product-lines/email_spec1_product34.cil.c[2480,2493] [2021-11-07 02:05:14,921 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:05:15,000 INFO L208 MainTranslator]: Completed translation [2021-11-07 02:05:15,001 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:05:15 WrapperNode [2021-11-07 02:05:15,001 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 02:05:15,003 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 02:05:15,003 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 02:05:15,003 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 02:05:15,012 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:05:15" (1/1) ... [2021-11-07 02:05:15,086 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:05:15" (1/1) ... [2021-11-07 02:05:15,348 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 02:05:15,349 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 02:05:15,350 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 02:05:15,350 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 02:05:15,365 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:05:15" (1/1) ... [2021-11-07 02:05:15,365 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:05:15" (1/1) ... [2021-11-07 02:05:15,399 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:05:15" (1/1) ... [2021-11-07 02:05:15,400 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:05:15" (1/1) ... [2021-11-07 02:05:15,568 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:05:15" (1/1) ... [2021-11-07 02:05:15,640 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:05:15" (1/1) ... [2021-11-07 02:05:15,666 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:05:15" (1/1) ... [2021-11-07 02:05:15,701 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 02:05:15,703 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 02:05:15,706 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 02:05:15,706 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 02:05:15,708 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:05:15" (1/1) ... [2021-11-07 02:05:15,717 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:05:15,730 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072efaa-80a8-4f24-b3b2-29428fd8edfb/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:05:15,748 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072efaa-80a8-4f24-b3b2-29428fd8edfb/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 02:05:15,767 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072efaa-80a8-4f24-b3b2-29428fd8edfb/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 02:05:15,817 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2021-11-07 02:05:15,818 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 02:05:15,818 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 02:05:15,818 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 02:05:15,818 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 02:05:22,811 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 02:05:22,812 INFO L299 CfgBuilder]: Removed 849 assume(true) statements. [2021-11-07 02:05:22,817 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:05:22 BoogieIcfgContainer [2021-11-07 02:05:22,817 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 02:05:22,820 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 02:05:22,820 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 02:05:22,823 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 02:05:22,824 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 02:05:13" (1/3) ... [2021-11-07 02:05:22,825 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f1b5928 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:05:22, skipping insertion in model container [2021-11-07 02:05:22,825 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:05:15" (2/3) ... [2021-11-07 02:05:22,825 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f1b5928 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:05:22, skipping insertion in model container [2021-11-07 02:05:22,826 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:05:22" (3/3) ... [2021-11-07 02:05:22,827 INFO L111 eAbstractionObserver]: Analyzing ICFG email_spec1_product34.cil.c [2021-11-07 02:05:22,833 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 02:05:22,834 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2021-11-07 02:05:22,900 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 02:05:22,907 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 02:05:22,908 INFO L340 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-11-07 02:05:22,987 INFO L276 IsEmpty]: Start isEmpty. Operand has 1260 states, 1253 states have (on average 1.7254588986432562) internal successors, (2162), 1259 states have internal predecessors, (2162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:05:23,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-07 02:05:23,005 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:05:23,006 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:05:23,007 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:05:23,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:05:23,015 INFO L85 PathProgramCache]: Analyzing trace with hash 2012381402, now seen corresponding path program 1 times [2021-11-07 02:05:23,030 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:05:23,031 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [615716656] [2021-11-07 02:05:23,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:05:23,032 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:05:23,032 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072efaa-80a8-4f24-b3b2-29428fd8edfb/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:05:23,040 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072efaa-80a8-4f24-b3b2-29428fd8edfb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:05:23,073 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072efaa-80a8-4f24-b3b2-29428fd8edfb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 02:05:23,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:05:23,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-07 02:05:23,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:05:23,755 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 02:05:23,756 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:05:23,974 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 02:05:23,975 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:05:23,976 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [615716656] [2021-11-07 02:05:23,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [615716656] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:05:23,977 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:05:23,977 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 02:05:23,979 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794412662] [2021-11-07 02:05:23,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 02:05:23,999 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:05:24,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 02:05:24,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 02:05:24,034 INFO L87 Difference]: Start difference. First operand has 1260 states, 1253 states have (on average 1.7254588986432562) internal successors, (2162), 1259 states have internal predecessors, (2162), 0 states have call successors, (0), 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 24.0) internal successors, (48), 2 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:05:24,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:05:24,190 INFO L93 Difference]: Finished difference Result 2235 states and 3801 transitions. [2021-11-07 02:05:24,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 02:05:24,192 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 24.0) internal successors, (48), 2 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-11-07 02:05:24,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:05:24,221 INFO L225 Difference]: With dead ends: 2235 [2021-11-07 02:05:24,221 INFO L226 Difference]: Without dead ends: 1040 [2021-11-07 02:05:24,232 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 94 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 02:05:24,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1040 states. [2021-11-07 02:05:24,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1040 to 1040. [2021-11-07 02:05:24,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1040 states, 1034 states have (on average 1.7282398452611218) internal successors, (1787), 1039 states have internal predecessors, (1787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:05:24,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1040 states to 1040 states and 1787 transitions. [2021-11-07 02:05:24,362 INFO L78 Accepts]: Start accepts. Automaton has 1040 states and 1787 transitions. Word has length 48 [2021-11-07 02:05:24,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:05:24,363 INFO L470 AbstractCegarLoop]: Abstraction has 1040 states and 1787 transitions. [2021-11-07 02:05:24,363 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 24.0) internal successors, (48), 2 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:05:24,364 INFO L276 IsEmpty]: Start isEmpty. Operand 1040 states and 1787 transitions. [2021-11-07 02:05:24,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-07 02:05:24,375 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:05:24,375 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:05:24,402 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072efaa-80a8-4f24-b3b2-29428fd8edfb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-11-07 02:05:24,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072efaa-80a8-4f24-b3b2-29428fd8edfb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:05:24,600 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:05:24,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:05:24,600 INFO L85 PathProgramCache]: Analyzing trace with hash -776076270, now seen corresponding path program 1 times [2021-11-07 02:05:24,601 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:05:24,602 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [447288531] [2021-11-07 02:05:24,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:05:24,602 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:05:24,602 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072efaa-80a8-4f24-b3b2-29428fd8edfb/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:05:24,604 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072efaa-80a8-4f24-b3b2-29428fd8edfb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:05:24,607 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072efaa-80a8-4f24-b3b2-29428fd8edfb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 02:05:25,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:05:25,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 478 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 02:05:25,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:05:25,321 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 02:05:25,322 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:05:25,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:05:25,526 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:05:25,526 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [447288531] [2021-11-07 02:05:25,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [447288531] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:05:25,527 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:05:25,527 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:05:25,528 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864328162] [2021-11-07 02:05:25,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:05:25,530 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:05:25,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:05:25,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:05:25,537 INFO L87 Difference]: Start difference. First operand 1040 states and 1787 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:05:25,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:05:25,749 INFO L93 Difference]: Finished difference Result 3090 states and 5313 transitions. [2021-11-07 02:05:25,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:05:25,749 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-11-07 02:05:25,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:05:25,768 INFO L225 Difference]: With dead ends: 3090 [2021-11-07 02:05:25,768 INFO L226 Difference]: Without dead ends: 2065 [2021-11-07 02:05:25,772 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 94 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 02:05:25,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2065 states. [2021-11-07 02:05:25,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2065 to 1039. [2021-11-07 02:05:25,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1039 states, 1033 states have (on average 1.7250726040658277) internal successors, (1782), 1038 states have internal predecessors, (1782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:05:25,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1039 states to 1039 states and 1782 transitions. [2021-11-07 02:05:25,894 INFO L78 Accepts]: Start accepts. Automaton has 1039 states and 1782 transitions. Word has length 49 [2021-11-07 02:05:25,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:05:25,894 INFO L470 AbstractCegarLoop]: Abstraction has 1039 states and 1782 transitions. [2021-11-07 02:05:25,894 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:05:25,895 INFO L276 IsEmpty]: Start isEmpty. Operand 1039 states and 1782 transitions. [2021-11-07 02:05:25,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-07 02:05:25,897 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:05:25,897 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:05:25,923 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072efaa-80a8-4f24-b3b2-29428fd8edfb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 02:05:26,106 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072efaa-80a8-4f24-b3b2-29428fd8edfb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:05:26,107 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:05:26,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:05:26,108 INFO L85 PathProgramCache]: Analyzing trace with hash 860399480, now seen corresponding path program 1 times [2021-11-07 02:05:26,109 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:05:26,109 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1369260186] [2021-11-07 02:05:26,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:05:26,110 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:05:26,110 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072efaa-80a8-4f24-b3b2-29428fd8edfb/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:05:26,112 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072efaa-80a8-4f24-b3b2-29428fd8edfb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:05:26,153 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072efaa-80a8-4f24-b3b2-29428fd8edfb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 02:05:26,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:05:26,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 02:05:26,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:05:26,825 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 02:05:26,825 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:05:27,025 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 02:05:27,025 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:05:27,026 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1369260186] [2021-11-07 02:05:27,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1369260186] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:05:27,026 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:05:27,027 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 02:05:27,027 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049495860] [2021-11-07 02:05:27,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:05:27,028 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:05:27,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:05:27,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:05:27,030 INFO L87 Difference]: Start difference. First operand 1039 states and 1782 transitions. Second operand has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 6 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:05:27,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:05:27,450 INFO L93 Difference]: Finished difference Result 4073 states and 6990 transitions. [2021-11-07 02:05:27,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 02:05:27,451 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 6 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-11-07 02:05:27,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:05:27,470 INFO L225 Difference]: With dead ends: 4073 [2021-11-07 02:05:27,470 INFO L226 Difference]: Without dead ends: 3052 [2021-11-07 02:05:27,472 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 96 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 02:05:27,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3052 states. [2021-11-07 02:05:27,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3052 to 1038. [2021-11-07 02:05:27,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1038 states, 1032 states have (on average 1.7228682170542635) internal successors, (1778), 1037 states have internal predecessors, (1778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:05:27,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1038 states to 1038 states and 1778 transitions. [2021-11-07 02:05:27,550 INFO L78 Accepts]: Start accepts. Automaton has 1038 states and 1778 transitions. Word has length 51 [2021-11-07 02:05:27,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:05:27,550 INFO L470 AbstractCegarLoop]: Abstraction has 1038 states and 1778 transitions. [2021-11-07 02:05:27,551 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 6 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:05:27,552 INFO L276 IsEmpty]: Start isEmpty. Operand 1038 states and 1778 transitions. [2021-11-07 02:05:27,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-07 02:05:27,556 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:05:27,556 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] [2021-11-07 02:05:27,576 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072efaa-80a8-4f24-b3b2-29428fd8edfb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 02:05:27,776 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072efaa-80a8-4f24-b3b2-29428fd8edfb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:05:27,776 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:05:27,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:05:27,777 INFO L85 PathProgramCache]: Analyzing trace with hash -843818229, now seen corresponding path program 1 times [2021-11-07 02:05:27,778 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:05:27,778 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1166769891] [2021-11-07 02:05:27,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:05:27,779 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:05:27,779 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072efaa-80a8-4f24-b3b2-29428fd8edfb/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:05:27,780 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072efaa-80a8-4f24-b3b2-29428fd8edfb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:05:27,806 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072efaa-80a8-4f24-b3b2-29428fd8edfb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 02:05:28,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:05:28,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 481 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 02:05:28,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:05:28,352 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:05:28,353 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:05:28,517 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 02:05:28,517 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:05:28,518 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1166769891] [2021-11-07 02:05:28,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1166769891] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:05:28,519 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:05:28,519 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:05:28,519 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130887251] [2021-11-07 02:05:28,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:05:28,520 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:05:28,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:05:28,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:05:28,521 INFO L87 Difference]: Start difference. First operand 1038 states and 1778 transitions. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:05:28,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:05:28,645 INFO L93 Difference]: Finished difference Result 2073 states and 3553 transitions. [2021-11-07 02:05:28,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:05:28,646 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-11-07 02:05:28,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:05:28,653 INFO L225 Difference]: With dead ends: 2073 [2021-11-07 02:05:28,653 INFO L226 Difference]: Without dead ends: 1043 [2021-11-07 02:05:28,655 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 100 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 02:05:28,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1043 states. [2021-11-07 02:05:28,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1043 to 1038. [2021-11-07 02:05:28,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1038 states, 1032 states have (on average 1.7199612403100775) internal successors, (1775), 1037 states have internal predecessors, (1775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:05:28,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1038 states to 1038 states and 1775 transitions. [2021-11-07 02:05:28,727 INFO L78 Accepts]: Start accepts. Automaton has 1038 states and 1775 transitions. Word has length 52 [2021-11-07 02:05:28,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:05:28,730 INFO L470 AbstractCegarLoop]: Abstraction has 1038 states and 1775 transitions. [2021-11-07 02:05:28,731 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:05:28,731 INFO L276 IsEmpty]: Start isEmpty. Operand 1038 states and 1775 transitions. [2021-11-07 02:05:28,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-07 02:05:28,733 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:05:28,735 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:05:28,751 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072efaa-80a8-4f24-b3b2-29428fd8edfb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 02:05:28,949 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072efaa-80a8-4f24-b3b2-29428fd8edfb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:05:28,950 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:05:28,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:05:28,951 INFO L85 PathProgramCache]: Analyzing trace with hash 61743712, now seen corresponding path program 1 times [2021-11-07 02:05:28,951 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:05:28,952 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [68744794] [2021-11-07 02:05:28,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:05:28,952 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:05:28,952 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072efaa-80a8-4f24-b3b2-29428fd8edfb/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:05:28,953 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072efaa-80a8-4f24-b3b2-29428fd8edfb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:05:28,996 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072efaa-80a8-4f24-b3b2-29428fd8edfb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 02:05:29,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:05:29,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 482 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 02:05:29,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:05:29,539 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 02:05:29,539 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:05:29,702 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 02:05:29,707 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:05:29,707 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [68744794] [2021-11-07 02:05:29,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [68744794] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:05:29,708 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:05:29,708 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 02:05:29,709 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110958877] [2021-11-07 02:05:29,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:05:29,710 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:05:29,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:05:29,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:05:29,719 INFO L87 Difference]: Start difference. First operand 1038 states and 1775 transitions. Second operand has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:05:30,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:05:30,165 INFO L93 Difference]: Finished difference Result 4060 states and 6966 transitions. [2021-11-07 02:05:30,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 02:05:30,165 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-11-07 02:05:30,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:05:30,186 INFO L225 Difference]: With dead ends: 4060 [2021-11-07 02:05:30,187 INFO L226 Difference]: Without dead ends: 3048 [2021-11-07 02:05:30,192 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 100 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 02:05:30,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3048 states. [2021-11-07 02:05:30,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3048 to 1038. [2021-11-07 02:05:30,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1038 states, 1032 states have (on average 1.7170542635658914) internal successors, (1772), 1037 states have internal predecessors, (1772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:05:30,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1038 states to 1038 states and 1772 transitions. [2021-11-07 02:05:30,305 INFO L78 Accepts]: Start accepts. Automaton has 1038 states and 1772 transitions. Word has length 53 [2021-11-07 02:05:30,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:05:30,335 INFO L470 AbstractCegarLoop]: Abstraction has 1038 states and 1772 transitions. [2021-11-07 02:05:30,335 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:05:30,335 INFO L276 IsEmpty]: Start isEmpty. Operand 1038 states and 1772 transitions. [2021-11-07 02:05:30,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-07 02:05:30,337 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:05:30,337 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:05:30,358 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072efaa-80a8-4f24-b3b2-29428fd8edfb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 02:05:30,537 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072efaa-80a8-4f24-b3b2-29428fd8edfb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:05:30,538 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:05:30,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:05:30,538 INFO L85 PathProgramCache]: Analyzing trace with hash 502870875, now seen corresponding path program 1 times [2021-11-07 02:05:30,539 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:05:30,539 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [473653539] [2021-11-07 02:05:30,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:05:30,539 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:05:30,539 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072efaa-80a8-4f24-b3b2-29428fd8edfb/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:05:30,541 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072efaa-80a8-4f24-b3b2-29428fd8edfb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:05:30,548 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072efaa-80a8-4f24-b3b2-29428fd8edfb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 02:05:31,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:05:31,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:05:31,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:05:31,238 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 02:05:31,238 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:05:31,383 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 02:05:31,383 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:05:31,383 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [473653539] [2021-11-07 02:05:31,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [473653539] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:05:31,384 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:05:31,384 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:05:31,384 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169209227] [2021-11-07 02:05:31,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:05:31,385 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:05:31,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:05:31,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:05:31,386 INFO L87 Difference]: Start difference. First operand 1038 states and 1772 transitions. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:05:31,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:05:31,575 INFO L93 Difference]: Finished difference Result 2805 states and 4781 transitions. [2021-11-07 02:05:31,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:05:31,576 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-11-07 02:05:31,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:05:31,589 INFO L225 Difference]: With dead ends: 2805 [2021-11-07 02:05:31,590 INFO L226 Difference]: Without dead ends: 2050 [2021-11-07 02:05:31,592 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 106 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 02:05:31,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2050 states. [2021-11-07 02:05:31,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2050 to 1295. [2021-11-07 02:05:31,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1295 states, 1289 states have (on average 1.7416602017067495) internal successors, (2245), 1294 states have internal predecessors, (2245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:05:31,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1295 states to 1295 states and 2245 transitions. [2021-11-07 02:05:31,751 INFO L78 Accepts]: Start accepts. Automaton has 1295 states and 2245 transitions. Word has length 55 [2021-11-07 02:05:31,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:05:31,752 INFO L470 AbstractCegarLoop]: Abstraction has 1295 states and 2245 transitions. [2021-11-07 02:05:31,752 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:05:31,752 INFO L276 IsEmpty]: Start isEmpty. Operand 1295 states and 2245 transitions. [2021-11-07 02:05:31,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-07 02:05:31,754 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:05:31,755 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 02:05:31,769 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072efaa-80a8-4f24-b3b2-29428fd8edfb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 02:05:31,969 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072efaa-80a8-4f24-b3b2-29428fd8edfb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:05:31,970 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:05:31,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:05:31,971 INFO L85 PathProgramCache]: Analyzing trace with hash -1657581204, now seen corresponding path program 1 times [2021-11-07 02:05:31,972 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:05:31,972 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2132486316] [2021-11-07 02:05:31,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:05:31,972 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:05:31,973 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072efaa-80a8-4f24-b3b2-29428fd8edfb/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:05:31,974 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072efaa-80a8-4f24-b3b2-29428fd8edfb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:05:32,014 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072efaa-80a8-4f24-b3b2-29428fd8edfb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 02:05:32,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:05:32,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 496 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:05:32,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:05:32,724 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 02:05:32,724 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:05:32,936 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 02:05:32,936 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:05:32,936 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2132486316] [2021-11-07 02:05:32,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2132486316] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:05:32,937 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:05:32,937 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:05:32,937 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216852645] [2021-11-07 02:05:32,938 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:05:32,938 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:05:32,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:05:32,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:05:32,939 INFO L87 Difference]: Start difference. First operand 1295 states and 2245 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:05:33,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:05:33,184 INFO L93 Difference]: Finished difference Result 3466 states and 6001 transitions. [2021-11-07 02:05:33,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:05:33,185 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-11-07 02:05:33,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:05:33,200 INFO L225 Difference]: With dead ends: 3466 [2021-11-07 02:05:33,200 INFO L226 Difference]: Without dead ends: 2255 [2021-11-07 02:05:33,204 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:05:33,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2255 states. [2021-11-07 02:05:33,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2255 to 1500. [2021-11-07 02:05:33,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1500 states, 1494 states have (on average 1.7543507362784472) internal successors, (2621), 1499 states have internal predecessors, (2621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:05:33,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1500 states to 1500 states and 2621 transitions. [2021-11-07 02:05:33,353 INFO L78 Accepts]: Start accepts. Automaton has 1500 states and 2621 transitions. Word has length 67 [2021-11-07 02:05:33,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:05:33,356 INFO L470 AbstractCegarLoop]: Abstraction has 1500 states and 2621 transitions. [2021-11-07 02:05:33,356 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:05:33,356 INFO L276 IsEmpty]: Start isEmpty. Operand 1500 states and 2621 transitions. [2021-11-07 02:05:33,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-07 02:05:33,359 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:05:33,359 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:05:33,386 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072efaa-80a8-4f24-b3b2-29428fd8edfb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 02:05:33,581 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072efaa-80a8-4f24-b3b2-29428fd8edfb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:05:33,582 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:05:33,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:05:33,582 INFO L85 PathProgramCache]: Analyzing trace with hash 1014523339, now seen corresponding path program 1 times [2021-11-07 02:05:33,583 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:05:33,583 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [997056479] [2021-11-07 02:05:33,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:05:33,584 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:05:33,584 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072efaa-80a8-4f24-b3b2-29428fd8edfb/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:05:33,587 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072efaa-80a8-4f24-b3b2-29428fd8edfb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:05:33,629 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072efaa-80a8-4f24-b3b2-29428fd8edfb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 02:05:34,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:05:34,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 498 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:05:34,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:05:34,408 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 02:05:34,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:05:34,608 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 02:05:34,608 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:05:34,608 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [997056479] [2021-11-07 02:05:34,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [997056479] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:05:34,609 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:05:34,609 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:05:34,609 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497772723] [2021-11-07 02:05:34,610 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:05:34,610 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:05:34,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:05:34,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:05:34,611 INFO L87 Difference]: Start difference. First operand 1500 states and 2621 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:05:34,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:05:34,867 INFO L93 Difference]: Finished difference Result 4125 states and 7215 transitions. [2021-11-07 02:05:34,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:05:34,867 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-11-07 02:05:34,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:05:34,888 INFO L225 Difference]: With dead ends: 4125 [2021-11-07 02:05:34,888 INFO L226 Difference]: Without dead ends: 2713 [2021-11-07 02:05:34,893 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:05:34,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2713 states. [2021-11-07 02:05:35,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2713 to 1958. [2021-11-07 02:05:35,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1958 states, 1952 states have (on average 1.774077868852459) internal successors, (3463), 1957 states have internal predecessors, (3463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:05:35,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1958 states to 1958 states and 3463 transitions. [2021-11-07 02:05:35,082 INFO L78 Accepts]: Start accepts. Automaton has 1958 states and 3463 transitions. Word has length 68 [2021-11-07 02:05:35,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:05:35,083 INFO L470 AbstractCegarLoop]: Abstraction has 1958 states and 3463 transitions. [2021-11-07 02:05:35,083 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:05:35,083 INFO L276 IsEmpty]: Start isEmpty. Operand 1958 states and 3463 transitions. [2021-11-07 02:05:35,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-07 02:05:35,087 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:05:35,087 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:05:35,112 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072efaa-80a8-4f24-b3b2-29428fd8edfb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 02:05:35,302 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072efaa-80a8-4f24-b3b2-29428fd8edfb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:05:35,303 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:05:35,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:05:35,303 INFO L85 PathProgramCache]: Analyzing trace with hash -595298117, now seen corresponding path program 1 times [2021-11-07 02:05:35,304 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:05:35,304 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [843161504] [2021-11-07 02:05:35,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:05:35,304 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:05:35,304 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072efaa-80a8-4f24-b3b2-29428fd8edfb/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:05:35,305 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072efaa-80a8-4f24-b3b2-29428fd8edfb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:05:35,308 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072efaa-80a8-4f24-b3b2-29428fd8edfb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 02:05:35,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:05:35,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 504 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:05:35,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:05:36,045 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:05:36,045 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:05:36,239 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:05:36,239 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:05:36,239 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [843161504] [2021-11-07 02:05:36,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [843161504] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:05:36,240 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:05:36,240 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:05:36,240 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90366853] [2021-11-07 02:05:36,241 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:05:36,241 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:05:36,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:05:36,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:05:36,242 INFO L87 Difference]: Start difference. First operand 1958 states and 3463 transitions. Second operand has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:05:36,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:05:36,508 INFO L93 Difference]: Finished difference Result 4382 states and 7685 transitions. [2021-11-07 02:05:36,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:05:36,508 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-11-07 02:05:36,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:05:36,529 INFO L225 Difference]: With dead ends: 4382 [2021-11-07 02:05:36,529 INFO L226 Difference]: Without dead ends: 2713 [2021-11-07 02:05:36,533 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 02:05:36,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2713 states. [2021-11-07 02:05:36,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2713 to 1958. [2021-11-07 02:05:36,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1958 states, 1952 states have (on average 1.7730532786885247) internal successors, (3461), 1957 states have internal predecessors, (3461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:05:36,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1958 states to 1958 states and 3461 transitions. [2021-11-07 02:05:36,771 INFO L78 Accepts]: Start accepts. Automaton has 1958 states and 3461 transitions. Word has length 69 [2021-11-07 02:05:36,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:05:36,772 INFO L470 AbstractCegarLoop]: Abstraction has 1958 states and 3461 transitions. [2021-11-07 02:05:36,772 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:05:36,772 INFO L276 IsEmpty]: Start isEmpty. Operand 1958 states and 3461 transitions. [2021-11-07 02:05:36,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-07 02:05:36,777 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:05:36,777 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 02:05:36,801 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072efaa-80a8-4f24-b3b2-29428fd8edfb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 02:05:36,990 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072efaa-80a8-4f24-b3b2-29428fd8edfb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:05:36,991 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:05:36,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:05:36,991 INFO L85 PathProgramCache]: Analyzing trace with hash -942786918, now seen corresponding path program 1 times [2021-11-07 02:05:36,992 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:05:36,992 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1562098647] [2021-11-07 02:05:36,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:05:36,992 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:05:36,993 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072efaa-80a8-4f24-b3b2-29428fd8edfb/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:05:36,993 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072efaa-80a8-4f24-b3b2-29428fd8edfb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:05:36,995 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072efaa-80a8-4f24-b3b2-29428fd8edfb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 02:05:37,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:05:37,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 500 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:05:37,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:05:37,770 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 02:05:37,771 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:05:37,966 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 02:05:37,966 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:05:37,966 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1562098647] [2021-11-07 02:05:37,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1562098647] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:05:37,966 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:05:37,966 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:05:37,967 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148402373] [2021-11-07 02:05:37,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:05:37,967 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:05:37,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:05:37,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:05:37,968 INFO L87 Difference]: Start difference. First operand 1958 states and 3461 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:05:38,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:05:38,276 INFO L93 Difference]: Finished difference Result 5471 states and 9690 transitions. [2021-11-07 02:05:38,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:05:38,277 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-11-07 02:05:38,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:05:38,305 INFO L225 Difference]: With dead ends: 5471 [2021-11-07 02:05:38,306 INFO L226 Difference]: Without dead ends: 3609 [2021-11-07 02:05:38,309 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:05:38,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3609 states. [2021-11-07 02:05:38,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3609 to 2854. [2021-11-07 02:05:38,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2854 states, 2848 states have (on average 1.7935393258426966) internal successors, (5108), 2853 states have internal predecessors, (5108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:05:38,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2854 states to 2854 states and 5108 transitions. [2021-11-07 02:05:38,551 INFO L78 Accepts]: Start accepts. Automaton has 2854 states and 5108 transitions. Word has length 69 [2021-11-07 02:05:38,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:05:38,552 INFO L470 AbstractCegarLoop]: Abstraction has 2854 states and 5108 transitions. [2021-11-07 02:05:38,552 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:05:38,552 INFO L276 IsEmpty]: Start isEmpty. Operand 2854 states and 5108 transitions. [2021-11-07 02:05:38,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-07 02:05:38,558 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:05:38,558 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:05:38,582 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072efaa-80a8-4f24-b3b2-29428fd8edfb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 02:05:38,777 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072efaa-80a8-4f24-b3b2-29428fd8edfb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:05:38,777 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:05:38,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:05:38,778 INFO L85 PathProgramCache]: Analyzing trace with hash -1154419827, now seen corresponding path program 1 times [2021-11-07 02:05:38,779 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:05:38,779 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1805421565] [2021-11-07 02:05:38,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:05:38,779 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:05:38,779 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072efaa-80a8-4f24-b3b2-29428fd8edfb/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:05:38,781 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072efaa-80a8-4f24-b3b2-29428fd8edfb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:05:38,818 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072efaa-80a8-4f24-b3b2-29428fd8edfb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 02:05:39,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:05:39,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 502 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:05:39,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:05:39,612 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 02:05:39,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:05:39,782 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 02:05:39,782 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:05:39,782 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1805421565] [2021-11-07 02:05:39,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1805421565] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:05:39,782 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:05:39,782 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:05:39,783 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243859351] [2021-11-07 02:05:39,783 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:05:39,783 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:05:39,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:05:39,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:05:39,784 INFO L87 Difference]: Start difference. First operand 2854 states and 5108 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:05:40,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:05:40,123 INFO L93 Difference]: Finished difference Result 7895 states and 14150 transitions. [2021-11-07 02:05:40,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:05:40,123 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-11-07 02:05:40,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:05:40,157 INFO L225 Difference]: With dead ends: 7895 [2021-11-07 02:05:40,158 INFO L226 Difference]: Without dead ends: 5171 [2021-11-07 02:05:40,163 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:05:40,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5171 states. [2021-11-07 02:05:40,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5171 to 4416. [2021-11-07 02:05:40,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4416 states, 4410 states have (on average 1.808843537414966) internal successors, (7977), 4415 states have internal predecessors, (7977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:05:40,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4416 states to 4416 states and 7977 transitions. [2021-11-07 02:05:40,517 INFO L78 Accepts]: Start accepts. Automaton has 4416 states and 7977 transitions. Word has length 70 [2021-11-07 02:05:40,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:05:40,518 INFO L470 AbstractCegarLoop]: Abstraction has 4416 states and 7977 transitions. [2021-11-07 02:05:40,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:05:40,519 INFO L276 IsEmpty]: Start isEmpty. Operand 4416 states and 7977 transitions. [2021-11-07 02:05:40,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-07 02:05:40,528 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:05:40,528 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:05:40,548 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072efaa-80a8-4f24-b3b2-29428fd8edfb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 02:05:40,744 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072efaa-80a8-4f24-b3b2-29428fd8edfb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:05:40,744 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:05:40,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:05:40,745 INFO L85 PathProgramCache]: Analyzing trace with hash -712329557, now seen corresponding path program 1 times [2021-11-07 02:05:40,745 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:05:40,745 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2108241755] [2021-11-07 02:05:40,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:05:40,746 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:05:40,746 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072efaa-80a8-4f24-b3b2-29428fd8edfb/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:05:40,747 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072efaa-80a8-4f24-b3b2-29428fd8edfb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:05:40,787 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072efaa-80a8-4f24-b3b2-29428fd8edfb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 02:05:41,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:05:41,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 504 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:05:41,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:05:41,547 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 02:05:41,547 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:05:41,713 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 02:05:41,713 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:05:41,713 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2108241755] [2021-11-07 02:05:41,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2108241755] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:05:41,713 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:05:41,713 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:05:41,714 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791733415] [2021-11-07 02:05:41,714 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:05:41,714 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:05:41,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:05:41,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:05:41,715 INFO L87 Difference]: Start difference. First operand 4416 states and 7977 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:05:42,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:05:42,183 INFO L93 Difference]: Finished difference Result 12297 states and 22240 transitions. [2021-11-07 02:05:42,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:05:42,184 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-11-07 02:05:42,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:05:42,210 INFO L225 Difference]: With dead ends: 12297 [2021-11-07 02:05:42,211 INFO L226 Difference]: Without dead ends: 8045 [2021-11-07 02:05:42,217 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:05:42,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8045 states. [2021-11-07 02:05:42,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8045 to 7290. [2021-11-07 02:05:42,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7290 states, 7284 states have (on average 1.8190554640307524) internal successors, (13250), 7289 states have internal predecessors, (13250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:05:42,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7290 states to 7290 states and 13250 transitions. [2021-11-07 02:05:42,775 INFO L78 Accepts]: Start accepts. Automaton has 7290 states and 13250 transitions. Word has length 71 [2021-11-07 02:05:42,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:05:42,776 INFO L470 AbstractCegarLoop]: Abstraction has 7290 states and 13250 transitions. [2021-11-07 02:05:42,776 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:05:42,776 INFO L276 IsEmpty]: Start isEmpty. Operand 7290 states and 13250 transitions. [2021-11-07 02:05:42,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-07 02:05:42,784 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:05:42,784 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] [2021-11-07 02:05:42,809 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072efaa-80a8-4f24-b3b2-29428fd8edfb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-07 02:05:43,004 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072efaa-80a8-4f24-b3b2-29428fd8edfb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:05:43,005 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:05:43,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:05:43,005 INFO L85 PathProgramCache]: Analyzing trace with hash -1522217969, now seen corresponding path program 1 times [2021-11-07 02:05:43,006 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:05:43,007 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [898721806] [2021-11-07 02:05:43,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:05:43,007 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:05:43,007 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072efaa-80a8-4f24-b3b2-29428fd8edfb/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:05:43,008 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072efaa-80a8-4f24-b3b2-29428fd8edfb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:05:43,019 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072efaa-80a8-4f24-b3b2-29428fd8edfb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 02:05:43,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:05:43,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 511 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:05:43,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:05:43,903 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 02:05:43,903 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:05:44,163 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 02:05:44,164 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:05:44,164 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [898721806] [2021-11-07 02:05:44,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [898721806] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:05:44,164 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:05:44,164 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 02:05:44,164 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537008709] [2021-11-07 02:05:44,165 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:05:44,165 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:05:44,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:05:44,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:05:44,166 INFO L87 Difference]: Start difference. First operand 7290 states and 13250 transitions. Second operand has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:05:47,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:05:47,744 INFO L93 Difference]: Finished difference Result 27671 states and 50335 transitions. [2021-11-07 02:05:47,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 02:05:47,745 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-11-07 02:05:47,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:05:47,804 INFO L225 Difference]: With dead ends: 27671 [2021-11-07 02:05:47,804 INFO L226 Difference]: Without dead ends: 20668 [2021-11-07 02:05:47,816 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 138 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 02:05:47,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20668 states. [2021-11-07 02:05:48,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20668 to 7240. [2021-11-07 02:05:48,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7240 states, 7234 states have (on average 1.803981199889411) internal successors, (13050), 7239 states have internal predecessors, (13050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:05:48,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7240 states to 7240 states and 13050 transitions. [2021-11-07 02:05:48,504 INFO L78 Accepts]: Start accepts. Automaton has 7240 states and 13050 transitions. Word has length 72 [2021-11-07 02:05:48,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:05:48,504 INFO L470 AbstractCegarLoop]: Abstraction has 7240 states and 13050 transitions. [2021-11-07 02:05:48,504 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:05:48,505 INFO L276 IsEmpty]: Start isEmpty. Operand 7240 states and 13050 transitions. [2021-11-07 02:05:48,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-07 02:05:48,520 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:05:48,521 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:05:48,540 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072efaa-80a8-4f24-b3b2-29428fd8edfb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-07 02:05:48,734 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072efaa-80a8-4f24-b3b2-29428fd8edfb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:05:48,735 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:05:48,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:05:48,735 INFO L85 PathProgramCache]: Analyzing trace with hash 1570902462, now seen corresponding path program 1 times [2021-11-07 02:05:48,736 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:05:48,736 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1154020816] [2021-11-07 02:05:48,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:05:48,736 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:05:48,736 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072efaa-80a8-4f24-b3b2-29428fd8edfb/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:05:48,740 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072efaa-80a8-4f24-b3b2-29428fd8edfb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:05:48,741 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072efaa-80a8-4f24-b3b2-29428fd8edfb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 02:05:49,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:05:49,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 506 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:05:49,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:05:49,611 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 02:05:49,611 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:05:49,781 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 02:05:49,781 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:05:49,781 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1154020816] [2021-11-07 02:05:49,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1154020816] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:05:49,781 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:05:49,781 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:05:49,781 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024545104] [2021-11-07 02:05:49,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:05:49,782 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:05:49,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:05:49,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:05:49,783 INFO L87 Difference]: Start difference. First operand 7240 states and 13050 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:05:50,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:05:50,525 INFO L93 Difference]: Finished difference Result 21098 states and 38082 transitions. [2021-11-07 02:05:50,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:05:50,526 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-11-07 02:05:50,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:05:50,573 INFO L225 Difference]: With dead ends: 21098 [2021-11-07 02:05:50,573 INFO L226 Difference]: Without dead ends: 14029 [2021-11-07 02:05:50,584 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:05:50,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14029 states. [2021-11-07 02:05:51,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14029 to 13274. [2021-11-07 02:05:51,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13274 states, 13268 states have (on average 1.8096924932167622) internal successors, (24011), 13273 states have internal predecessors, (24011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:05:51,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13274 states to 13274 states and 24011 transitions. [2021-11-07 02:05:51,425 INFO L78 Accepts]: Start accepts. Automaton has 13274 states and 24011 transitions. Word has length 72 [2021-11-07 02:05:51,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:05:51,425 INFO L470 AbstractCegarLoop]: Abstraction has 13274 states and 24011 transitions. [2021-11-07 02:05:51,426 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:05:51,426 INFO L276 IsEmpty]: Start isEmpty. Operand 13274 states and 24011 transitions. [2021-11-07 02:05:51,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-07 02:05:51,437 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:05:51,438 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] [2021-11-07 02:05:51,457 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072efaa-80a8-4f24-b3b2-29428fd8edfb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-07 02:05:51,657 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072efaa-80a8-4f24-b3b2-29428fd8edfb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:05:51,657 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:05:51,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:05:51,658 INFO L85 PathProgramCache]: Analyzing trace with hash -1909177590, now seen corresponding path program 1 times [2021-11-07 02:05:51,658 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:05:51,659 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [168637749] [2021-11-07 02:05:51,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:05:51,659 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:05:51,659 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072efaa-80a8-4f24-b3b2-29428fd8edfb/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:05:51,660 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072efaa-80a8-4f24-b3b2-29428fd8edfb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:05:51,701 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072efaa-80a8-4f24-b3b2-29428fd8edfb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 02:05:52,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:05:52,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 512 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:05:52,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:05:52,649 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 02:05:52,649 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:05:52,926 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 02:05:52,926 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:05:52,926 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [168637749] [2021-11-07 02:05:52,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [168637749] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:05:52,926 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1518578150] [2021-11-07 02:05:52,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:05:52,927 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:05:52,927 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072efaa-80a8-4f24-b3b2-29428fd8edfb/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:05:52,934 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072efaa-80a8-4f24-b3b2-29428fd8edfb/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:05:52,951 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072efaa-80a8-4f24-b3b2-29428fd8edfb/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-07 02:05:53,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:05:53,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 512 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:05:53,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:05:54,206 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 02:05:54,206 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:05:54,535 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 02:05:54,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1518578150] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:05:54,536 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:05:54,536 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [5, 5] total 9 [2021-11-07 02:05:54,536 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653716050] [2021-11-07 02:05:54,537 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:05:54,537 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:05:54,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:05:54,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 02:05:54,538 INFO L87 Difference]: Start difference. First operand 13274 states and 24011 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 2 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:05:55,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:05:55,516 INFO L93 Difference]: Finished difference Result 13911 states and 25076 transitions. [2021-11-07 02:05:55,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:05:55,517 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 2 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2021-11-07 02:05:55,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:05:55,560 INFO L225 Difference]: With dead ends: 13911 [2021-11-07 02:05:55,561 INFO L226 Difference]: Without dead ends: 13262 [2021-11-07 02:05:55,567 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 281 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 02:05:55,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13262 states. [2021-11-07 02:05:56,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13262 to 13262. [2021-11-07 02:05:56,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13262 states, 13258 states have (on average 1.8096998038919898) internal successors, (23993), 13261 states have internal predecessors, (23993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:05:56,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13262 states to 13262 states and 23993 transitions. [2021-11-07 02:05:56,591 INFO L78 Accepts]: Start accepts. Automaton has 13262 states and 23993 transitions. Word has length 73 [2021-11-07 02:05:56,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:05:56,592 INFO L470 AbstractCegarLoop]: Abstraction has 13262 states and 23993 transitions. [2021-11-07 02:05:56,592 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 2 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:05:56,592 INFO L276 IsEmpty]: Start isEmpty. Operand 13262 states and 23993 transitions. [2021-11-07 02:05:56,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-07 02:05:56,629 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:05:56,629 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:05:56,638 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072efaa-80a8-4f24-b3b2-29428fd8edfb/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2021-11-07 02:05:56,845 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072efaa-80a8-4f24-b3b2-29428fd8edfb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-07 02:05:57,034 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072efaa-80a8-4f24-b3b2-29428fd8edfb/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072efaa-80a8-4f24-b3b2-29428fd8edfb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:05:57,035 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:05:57,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:05:57,035 INFO L85 PathProgramCache]: Analyzing trace with hash -631174936, now seen corresponding path program 1 times [2021-11-07 02:05:57,036 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:05:57,036 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1627902304] [2021-11-07 02:05:57,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:05:57,036 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:05:57,036 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072efaa-80a8-4f24-b3b2-29428fd8edfb/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:05:57,037 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072efaa-80a8-4f24-b3b2-29428fd8edfb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:05:57,038 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072efaa-80a8-4f24-b3b2-29428fd8edfb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 02:05:57,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:05:57,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 664 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:05:57,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:05:58,116 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 02:05:58,117 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:05:58,467 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 02:05:58,467 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:05:58,468 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1627902304] [2021-11-07 02:05:58,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1627902304] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:05:58,468 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1094037861] [2021-11-07 02:05:58,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:05:58,468 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:05:58,469 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072efaa-80a8-4f24-b3b2-29428fd8edfb/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:05:58,472 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072efaa-80a8-4f24-b3b2-29428fd8edfb/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:05:58,473 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072efaa-80a8-4f24-b3b2-29428fd8edfb/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2021-11-07 02:05:59,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:05:59,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 664 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 02:05:59,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:05:59,874 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 02:05:59,874 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:06:00,303 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 02:06:00,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1094037861] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:06:00,304 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:06:00,304 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [5, 5] total 16 [2021-11-07 02:06:00,304 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218027850] [2021-11-07 02:06:00,305 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-07 02:06:00,305 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:06:00,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-07 02:06:00,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-11-07 02:06:00,307 INFO L87 Difference]: Start difference. First operand 13262 states and 23993 transitions. Second operand has 10 states, 10 states have (on average 15.1) internal successors, (151), 10 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:06:08,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:06:08,650 INFO L93 Difference]: Finished difference Result 88706 states and 159717 transitions. [2021-11-07 02:06:08,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-07 02:06:08,651 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 15.1) internal successors, (151), 10 states have internal predecessors, (151), 0 states have call successors, (0), 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 116 [2021-11-07 02:06:08,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:06:08,876 INFO L225 Difference]: With dead ends: 88706 [2021-11-07 02:06:08,876 INFO L226 Difference]: Without dead ends: 87981 [2021-11-07 02:06:08,898 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 480 GetRequests, 446 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=242, Invalid=1018, Unknown=0, NotChecked=0, Total=1260 [2021-11-07 02:06:09,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87981 states. [2021-11-07 02:06:11,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87981 to 26252. [2021-11-07 02:06:11,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26252 states, 26248 states have (on average 1.8108046327339227) internal successors, (47530), 26251 states have internal predecessors, (47530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:06:11,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26252 states to 26252 states and 47530 transitions. [2021-11-07 02:06:11,210 INFO L78 Accepts]: Start accepts. Automaton has 26252 states and 47530 transitions. Word has length 116 [2021-11-07 02:06:11,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:06:11,210 INFO L470 AbstractCegarLoop]: Abstraction has 26252 states and 47530 transitions. [2021-11-07 02:06:11,211 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.1) internal successors, (151), 10 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:06:11,211 INFO L276 IsEmpty]: Start isEmpty. Operand 26252 states and 47530 transitions. [2021-11-07 02:06:11,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-07 02:06:11,276 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:06:11,276 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:06:11,282 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072efaa-80a8-4f24-b3b2-29428fd8edfb/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2021-11-07 02:06:11,491 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072efaa-80a8-4f24-b3b2-29428fd8edfb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Ended with exit code 0 [2021-11-07 02:06:11,677 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072efaa-80a8-4f24-b3b2-29428fd8edfb/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072efaa-80a8-4f24-b3b2-29428fd8edfb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:06:11,677 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:06:11,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:06:11,678 INFO L85 PathProgramCache]: Analyzing trace with hash 1097625749, now seen corresponding path program 1 times [2021-11-07 02:06:11,679 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:06:11,679 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [775353005] [2021-11-07 02:06:11,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:06:11,679 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:06:11,679 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072efaa-80a8-4f24-b3b2-29428fd8edfb/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:06:11,680 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072efaa-80a8-4f24-b3b2-29428fd8edfb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:06:11,876 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072efaa-80a8-4f24-b3b2-29428fd8edfb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-07 02:06:12,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:06:12,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 665 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 02:06:12,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:06:13,154 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 02:06:13,155 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:06:13,477 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 02:06:13,477 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:06:13,477 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [775353005] [2021-11-07 02:06:13,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [775353005] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:06:13,478 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:06:13,478 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 02:06:13,478 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082239148] [2021-11-07 02:06:13,479 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:06:13,479 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:06:13,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:06:13,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:06:13,480 INFO L87 Difference]: Start difference. First operand 26252 states and 47530 transitions. Second operand has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:06:15,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:06:15,422 INFO L93 Difference]: Finished difference Result 51720 states and 93850 transitions. [2021-11-07 02:06:15,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:06:15,423 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 117 [2021-11-07 02:06:15,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:06:15,478 INFO L225 Difference]: With dead ends: 51720 [2021-11-07 02:06:15,478 INFO L226 Difference]: Without dead ends: 25758 [2021-11-07 02:06:15,513 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 230 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 02:06:15,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25758 states. [2021-11-07 02:06:16,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25758 to 13264. [2021-11-07 02:06:16,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13264 states, 13260 states have (on average 1.8093514328808447) internal successors, (23992), 13263 states have internal predecessors, (23992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:06:16,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13264 states to 13264 states and 23992 transitions. [2021-11-07 02:06:16,715 INFO L78 Accepts]: Start accepts. Automaton has 13264 states and 23992 transitions. Word has length 117 [2021-11-07 02:06:16,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:06:16,715 INFO L470 AbstractCegarLoop]: Abstraction has 13264 states and 23992 transitions. [2021-11-07 02:06:16,715 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:06:16,716 INFO L276 IsEmpty]: Start isEmpty. Operand 13264 states and 23992 transitions. [2021-11-07 02:06:16,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-11-07 02:06:16,739 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:06:16,739 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:06:16,757 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072efaa-80a8-4f24-b3b2-29428fd8edfb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-07 02:06:16,940 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072efaa-80a8-4f24-b3b2-29428fd8edfb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:06:16,940 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:06:16,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:06:16,941 INFO L85 PathProgramCache]: Analyzing trace with hash 1460034058, now seen corresponding path program 1 times [2021-11-07 02:06:16,942 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:06:16,942 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1926618711] [2021-11-07 02:06:16,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:06:16,942 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:06:16,942 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072efaa-80a8-4f24-b3b2-29428fd8edfb/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:06:16,943 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072efaa-80a8-4f24-b3b2-29428fd8edfb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:06:16,950 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072efaa-80a8-4f24-b3b2-29428fd8edfb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-07 02:06:17,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:06:17,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 666 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:06:17,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:06:18,158 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 02:06:18,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:06:18,480 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 02:06:18,480 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:06:18,480 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1926618711] [2021-11-07 02:06:18,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1926618711] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:06:18,480 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [689043467] [2021-11-07 02:06:18,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:06:18,481 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:06:18,481 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072efaa-80a8-4f24-b3b2-29428fd8edfb/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:06:18,482 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072efaa-80a8-4f24-b3b2-29428fd8edfb/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:06:18,483 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072efaa-80a8-4f24-b3b2-29428fd8edfb/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2021-11-07 02:06:19,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:06:19,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 666 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 02:06:19,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:06:20,105 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 02:06:20,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:06:20,446 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 02:06:20,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [689043467] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:06:20,446 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:06:20,447 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [5, 5] total 11 [2021-11-07 02:06:20,447 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154195024] [2021-11-07 02:06:20,448 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 02:06:20,448 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:06:20,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 02:06:20,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-11-07 02:06:20,449 INFO L87 Difference]: Start difference. First operand 13264 states and 23992 transitions. Second operand has 5 states, 5 states have (on average 22.4) internal successors, (112), 5 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:06:23,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:06:23,666 INFO L93 Difference]: Finished difference Result 14608 states and 26242 transitions. [2021-11-07 02:06:23,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 02:06:23,667 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.4) internal successors, (112), 5 states have internal predecessors, (112), 0 states have call successors, (0), 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 118 [2021-11-07 02:06:23,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:06:23,698 INFO L225 Difference]: With dead ends: 14608 [2021-11-07 02:06:23,698 INFO L226 Difference]: Without dead ends: 13872 [2021-11-07 02:06:23,705 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 470 GetRequests, 459 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-11-07 02:06:23,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13872 states. [2021-11-07 02:06:24,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13872 to 13260. [2021-11-07 02:06:24,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13260 states, 13256 states have (on average 1.8092939046469523) internal successors, (23984), 13259 states have internal predecessors, (23984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:06:24,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13260 states to 13260 states and 23984 transitions. [2021-11-07 02:06:24,731 INFO L78 Accepts]: Start accepts. Automaton has 13260 states and 23984 transitions. Word has length 118 [2021-11-07 02:06:24,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:06:24,732 INFO L470 AbstractCegarLoop]: Abstraction has 13260 states and 23984 transitions. [2021-11-07 02:06:24,732 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.4) internal successors, (112), 5 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:06:24,732 INFO L276 IsEmpty]: Start isEmpty. Operand 13260 states and 23984 transitions. [2021-11-07 02:06:24,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-07 02:06:24,752 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:06:24,820 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:06:24,831 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072efaa-80a8-4f24-b3b2-29428fd8edfb/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (22)] Forceful destruction successful, exit code 0 [2021-11-07 02:06:25,037 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072efaa-80a8-4f24-b3b2-29428fd8edfb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-07 02:06:25,221 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072efaa-80a8-4f24-b3b2-29428fd8edfb/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072efaa-80a8-4f24-b3b2-29428fd8edfb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:06:25,222 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:06:25,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:06:25,222 INFO L85 PathProgramCache]: Analyzing trace with hash -1101413928, now seen corresponding path program 1 times [2021-11-07 02:06:25,223 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:06:25,223 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1791049169] [2021-11-07 02:06:25,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:06:25,224 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:06:25,224 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072efaa-80a8-4f24-b3b2-29428fd8edfb/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:06:25,225 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072efaa-80a8-4f24-b3b2-29428fd8edfb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:06:25,226 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072efaa-80a8-4f24-b3b2-29428fd8edfb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-07 02:06:26,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:06:26,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 677 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:06:26,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:06:26,770 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 02:06:26,770 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:06:27,128 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 02:06:27,128 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:06:27,128 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1791049169] [2021-11-07 02:06:27,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1791049169] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:06:27,128 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [971773580] [2021-11-07 02:06:27,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:06:27,129 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:06:27,129 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072efaa-80a8-4f24-b3b2-29428fd8edfb/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:06:27,130 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072efaa-80a8-4f24-b3b2-29428fd8edfb/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:06:27,131 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072efaa-80a8-4f24-b3b2-29428fd8edfb/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2021-11-07 02:06:28,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:06:28,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 677 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-07 02:06:28,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:06:29,443 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 02:06:29,443 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:06:30,033 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 02:06:30,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [971773580] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:06:30,034 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:06:30,034 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [5, 5] total 22 [2021-11-07 02:06:30,035 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133614054] [2021-11-07 02:06:30,035 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-07 02:06:30,036 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:06:30,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-07 02:06:30,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-11-07 02:06:30,037 INFO L87 Difference]: Start difference. First operand 13260 states and 23984 transitions. Second operand has 16 states, 16 states have (on average 10.75) internal successors, (172), 15 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:06:52,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:06:52,249 INFO L93 Difference]: Finished difference Result 35208 states and 62232 transitions. [2021-11-07 02:06:52,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-11-07 02:06:52,250 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 10.75) internal successors, (172), 15 states have internal predecessors, (172), 0 states have call successors, (0), 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 120 [2021-11-07 02:06:52,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:06:52,303 INFO L225 Difference]: With dead ends: 35208 [2021-11-07 02:06:52,303 INFO L226 Difference]: Without dead ends: 34531 [2021-11-07 02:06:52,310 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 522 GetRequests, 456 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1101 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1073, Invalid=3483, Unknown=0, NotChecked=0, Total=4556 [2021-11-07 02:06:52,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34531 states. [2021-11-07 02:06:54,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34531 to 26871. [2021-11-07 02:06:54,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26871 states, 26867 states have (on average 1.8075706256746193) internal successors, (48564), 26870 states have internal predecessors, (48564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:06:54,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26871 states to 26871 states and 48564 transitions. [2021-11-07 02:06:54,199 INFO L78 Accepts]: Start accepts. Automaton has 26871 states and 48564 transitions. Word has length 120 [2021-11-07 02:06:54,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:06:54,200 INFO L470 AbstractCegarLoop]: Abstraction has 26871 states and 48564 transitions. [2021-11-07 02:06:54,200 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 10.75) internal successors, (172), 15 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:06:54,200 INFO L276 IsEmpty]: Start isEmpty. Operand 26871 states and 48564 transitions. [2021-11-07 02:06:54,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-11-07 02:06:54,243 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:06:54,243 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:06:54,260 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072efaa-80a8-4f24-b3b2-29428fd8edfb/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (24)] Forceful destruction successful, exit code 0 [2021-11-07 02:06:54,467 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072efaa-80a8-4f24-b3b2-29428fd8edfb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (23)] Ended with exit code 0 [2021-11-07 02:06:54,652 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072efaa-80a8-4f24-b3b2-29428fd8edfb/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072efaa-80a8-4f24-b3b2-29428fd8edfb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:06:54,652 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:06:54,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:06:54,653 INFO L85 PathProgramCache]: Analyzing trace with hash 604629021, now seen corresponding path program 1 times [2021-11-07 02:06:54,653 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:06:54,653 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [167537518] [2021-11-07 02:06:54,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:06:54,654 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:06:54,654 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072efaa-80a8-4f24-b3b2-29428fd8edfb/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:06:54,655 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072efaa-80a8-4f24-b3b2-29428fd8edfb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:06:54,656 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072efaa-80a8-4f24-b3b2-29428fd8edfb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-07 02:06:55,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:06:55,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 680 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:06:55,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:06:56,310 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 02:06:56,310 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:06:56,763 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 02:06:56,763 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:06:56,763 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [167537518] [2021-11-07 02:06:56,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [167537518] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:06:56,763 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [87528022] [2021-11-07 02:06:56,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:06:56,764 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:06:56,764 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072efaa-80a8-4f24-b3b2-29428fd8edfb/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:06:56,765 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072efaa-80a8-4f24-b3b2-29428fd8edfb/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:06:56,782 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072efaa-80a8-4f24-b3b2-29428fd8edfb/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2021-11-07 02:06:58,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:06:58,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 680 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 02:06:58,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:06:58,826 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 02:06:58,826 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:06:59,220 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 02:06:59,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [87528022] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:06:59,220 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:06:59,221 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5, 5] total 11 [2021-11-07 02:06:59,221 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479719962] [2021-11-07 02:06:59,221 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 02:06:59,221 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:06:59,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 02:06:59,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-11-07 02:06:59,222 INFO L87 Difference]: Start difference. First operand 26871 states and 48564 transitions. Second operand has 5 states, 5 states have (on average 23.0) internal successors, (115), 4 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:03,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:07:03,053 INFO L93 Difference]: Finished difference Result 56120 states and 101066 transitions. [2021-11-07 02:07:03,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 02:07:03,054 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 23.0) internal successors, (115), 4 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 121 [2021-11-07 02:07:03,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:07:03,143 INFO L225 Difference]: With dead ends: 56120 [2021-11-07 02:07:03,143 INFO L226 Difference]: Without dead ends: 54545 [2021-11-07 02:07:03,151 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 484 GetRequests, 471 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-11-07 02:07:03,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54545 states. [2021-11-07 02:07:06,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54545 to 52850. [2021-11-07 02:07:06,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52850 states, 52846 states have (on average 1.8090867804564206) internal successors, (95603), 52849 states have internal predecessors, (95603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:06,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52850 states to 52850 states and 95603 transitions. [2021-11-07 02:07:06,299 INFO L78 Accepts]: Start accepts. Automaton has 52850 states and 95603 transitions. Word has length 121 [2021-11-07 02:07:06,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:07:06,300 INFO L470 AbstractCegarLoop]: Abstraction has 52850 states and 95603 transitions. [2021-11-07 02:07:06,300 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.0) internal successors, (115), 4 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:06,300 INFO L276 IsEmpty]: Start isEmpty. Operand 52850 states and 95603 transitions. [2021-11-07 02:07:06,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-11-07 02:07:06,632 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:07:06,632 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:07:06,639 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072efaa-80a8-4f24-b3b2-29428fd8edfb/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (26)] Forceful destruction successful, exit code 0 [2021-11-07 02:07:06,851 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072efaa-80a8-4f24-b3b2-29428fd8edfb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-07 02:07:07,033 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072efaa-80a8-4f24-b3b2-29428fd8edfb/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072efaa-80a8-4f24-b3b2-29428fd8edfb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:07:07,033 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:07:07,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:07:07,034 INFO L85 PathProgramCache]: Analyzing trace with hash -1686103709, now seen corresponding path program 1 times [2021-11-07 02:07:07,034 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:07:07,035 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1539465917] [2021-11-07 02:07:07,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:07:07,035 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:07:07,035 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072efaa-80a8-4f24-b3b2-29428fd8edfb/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:07:07,036 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072efaa-80a8-4f24-b3b2-29428fd8edfb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:07:07,038 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072efaa-80a8-4f24-b3b2-29428fd8edfb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-07 02:07:08,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:07:08,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 678 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:07:08,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:07:08,774 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 02:07:08,774 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:07:09,107 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 02:07:09,108 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:07:09,108 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1539465917] [2021-11-07 02:07:09,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1539465917] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:07:09,108 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1945121705] [2021-11-07 02:07:09,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:07:09,108 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:07:09,109 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072efaa-80a8-4f24-b3b2-29428fd8edfb/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:07:09,109 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072efaa-80a8-4f24-b3b2-29428fd8edfb/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:07:09,111 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072efaa-80a8-4f24-b3b2-29428fd8edfb/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2021-11-07 02:07:10,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:07:10,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 678 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:07:10,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:07:11,149 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 02:07:11,149 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:07:11,433 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 02:07:11,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1945121705] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:07:11,433 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:07:11,433 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5, 5] total 10 [2021-11-07 02:07:11,433 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139005269] [2021-11-07 02:07:11,434 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:07:11,434 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:07:11,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:07:11,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-11-07 02:07:11,435 INFO L87 Difference]: Start difference. First operand 52850 states and 95603 transitions. Second operand has 4 states, 4 states have (on average 28.75) internal successors, (115), 4 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:15,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:07:15,016 INFO L93 Difference]: Finished difference Result 57207 states and 102855 transitions. [2021-11-07 02:07:15,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:07:15,017 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.75) internal successors, (115), 4 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 121 [2021-11-07 02:07:15,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:07:15,103 INFO L225 Difference]: With dead ends: 57207 [2021-11-07 02:07:15,103 INFO L226 Difference]: Without dead ends: 54184 [2021-11-07 02:07:15,112 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 481 GetRequests, 472 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-11-07 02:07:15,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54184 states. [2021-11-07 02:07:18,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54184 to 52500. [2021-11-07 02:07:18,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52500 states, 52496 states have (on average 1.8099093264248705) internal successors, (95013), 52499 states have internal predecessors, (95013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:18,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52500 states to 52500 states and 95013 transitions. [2021-11-07 02:07:18,430 INFO L78 Accepts]: Start accepts. Automaton has 52500 states and 95013 transitions. Word has length 121 [2021-11-07 02:07:18,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:07:18,431 INFO L470 AbstractCegarLoop]: Abstraction has 52500 states and 95013 transitions. [2021-11-07 02:07:18,431 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.75) internal successors, (115), 4 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:18,431 INFO L276 IsEmpty]: Start isEmpty. Operand 52500 states and 95013 transitions. [2021-11-07 02:07:18,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-11-07 02:07:18,723 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:07:18,723 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:07:18,746 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072efaa-80a8-4f24-b3b2-29428fd8edfb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (27)] Ended with exit code 0 [2021-11-07 02:07:18,945 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072efaa-80a8-4f24-b3b2-29428fd8edfb/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (28)] Forceful destruction successful, exit code 0 [2021-11-07 02:07:19,138 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072efaa-80a8-4f24-b3b2-29428fd8edfb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072efaa-80a8-4f24-b3b2-29428fd8edfb/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 02:07:19,139 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:07:19,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:07:19,140 INFO L85 PathProgramCache]: Analyzing trace with hash -1079358978, now seen corresponding path program 1 times [2021-11-07 02:07:19,141 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:07:19,141 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [629759600] [2021-11-07 02:07:19,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:07:19,141 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:07:19,141 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072efaa-80a8-4f24-b3b2-29428fd8edfb/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:07:19,143 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072efaa-80a8-4f24-b3b2-29428fd8edfb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:07:19,145 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072efaa-80a8-4f24-b3b2-29428fd8edfb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-07 02:07:20,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:07:20,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 679 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:07:20,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:07:21,091 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 02:07:21,091 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:07:21,487 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 02:07:21,487 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:07:21,487 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [629759600] [2021-11-07 02:07:21,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [629759600] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:07:21,487 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [149615383] [2021-11-07 02:07:21,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:07:21,488 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:07:21,488 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072efaa-80a8-4f24-b3b2-29428fd8edfb/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:07:21,489 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072efaa-80a8-4f24-b3b2-29428fd8edfb/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:07:21,490 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072efaa-80a8-4f24-b3b2-29428fd8edfb/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2021-11-07 02:07:23,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:07:23,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 679 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-07 02:07:23,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:07:24,007 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 02:07:24,008 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:07:24,484 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 02:07:24,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [149615383] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:07:24,484 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:07:24,485 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [5, 5] total 14 [2021-11-07 02:07:24,485 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869511776] [2021-11-07 02:07:24,486 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 02:07:24,486 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:07:24,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 02:07:24,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-11-07 02:07:24,487 INFO L87 Difference]: Start difference. First operand 52500 states and 95013 transitions. Second operand has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:30,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:07:30,376 INFO L93 Difference]: Finished difference Result 56956 states and 102363 transitions. [2021-11-07 02:07:30,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 02:07:30,379 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 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 122 [2021-11-07 02:07:30,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:07:30,469 INFO L225 Difference]: With dead ends: 56956 [2021-11-07 02:07:30,470 INFO L226 Difference]: Without dead ends: 54017 [2021-11-07 02:07:30,479 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 494 GetRequests, 472 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=121, Invalid=431, Unknown=0, NotChecked=0, Total=552 [2021-11-07 02:07:30,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54017 states.