./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test5-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cf8e26-691a-4bb2-ab70-51cc348bb7a6/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cf8e26-691a-4bb2-ab70-51cc348bb7a6/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_68cf8e26-691a-4bb2-ab70-51cc348bb7a6/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cf8e26-691a-4bb2-ab70-51cc348bb7a6/bin/utaipan-UUZaoUuFF8/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test5-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cf8e26-691a-4bb2-ab70-51cc348bb7a6/bin/utaipan-UUZaoUuFF8/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cf8e26-691a-4bb2-ab70-51cc348bb7a6/bin/utaipan-UUZaoUuFF8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 9fd228108b00a337c799c923821cefd2f3f25ea1b43eb489705884efe2b6ca03 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 02:19:49,077 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 02:19:49,080 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 02:19:49,116 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 02:19:49,117 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 02:19:49,118 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 02:19:49,120 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 02:19:49,123 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 02:19:49,125 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 02:19:49,127 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 02:19:49,128 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 02:19:49,130 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 02:19:49,131 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 02:19:49,132 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 02:19:49,134 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 02:19:49,136 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 02:19:49,137 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 02:19:49,139 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 02:19:49,142 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 02:19:49,144 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 02:19:49,147 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 02:19:49,149 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 02:19:49,150 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 02:19:49,152 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 02:19:49,156 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 02:19:49,156 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 02:19:49,157 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 02:19:49,158 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 02:19:49,159 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 02:19:49,160 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 02:19:49,161 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 02:19:49,162 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 02:19:49,163 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 02:19:49,164 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 02:19:49,166 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 02:19:49,166 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 02:19:49,168 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 02:19:49,168 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 02:19:49,168 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 02:19:49,170 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 02:19:49,171 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 02:19:49,172 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cf8e26-691a-4bb2-ab70-51cc348bb7a6/bin/utaipan-UUZaoUuFF8/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-11-07 02:19:49,197 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 02:19:49,197 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 02:19:49,198 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 02:19:49,199 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 02:19:49,199 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 02:19:49,199 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 02:19:49,199 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 02:19:49,200 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 02:19:49,200 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 02:19:49,200 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 02:19:49,200 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 02:19:49,201 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 02:19:49,201 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 02:19:49,201 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 02:19:49,202 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 02:19:49,202 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-07 02:19:49,203 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-07 02:19:49,203 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 02:19:49,203 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 02:19:49,204 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-07 02:19:49,204 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 02:19:49,204 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 02:19:49,204 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 02:19:49,205 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-07 02:19:49,205 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-07 02:19:49,205 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-07 02:19:49,205 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 02:19:49,206 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 02:19:49,206 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 02:19:49,206 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 02:19:49,206 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 02:19:49,207 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 02:19:49,207 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:19:49,207 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 02:19:49,207 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 02:19:49,208 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 02:19:49,208 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 02:19:49,208 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 02:19:49,208 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 02:19:49,209 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_68cf8e26-691a-4bb2-ab70-51cc348bb7a6/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cf8e26-691a-4bb2-ab70-51cc348bb7a6/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9fd228108b00a337c799c923821cefd2f3f25ea1b43eb489705884efe2b6ca03 [2021-11-07 02:19:49,451 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 02:19:49,485 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 02:19:49,488 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 02:19:49,490 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 02:19:49,491 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 02:19:49,492 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cf8e26-691a-4bb2-ab70-51cc348bb7a6/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test5-1.i [2021-11-07 02:19:49,593 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cf8e26-691a-4bb2-ab70-51cc348bb7a6/bin/utaipan-UUZaoUuFF8/data/206bfaa2b/1c732245e30b43709b42fcb80a49c5c2/FLAGf21028a58 [2021-11-07 02:19:50,253 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 02:19:50,254 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cf8e26-691a-4bb2-ab70-51cc348bb7a6/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test5-1.i [2021-11-07 02:19:50,288 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cf8e26-691a-4bb2-ab70-51cc348bb7a6/bin/utaipan-UUZaoUuFF8/data/206bfaa2b/1c732245e30b43709b42fcb80a49c5c2/FLAGf21028a58 [2021-11-07 02:19:50,471 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cf8e26-691a-4bb2-ab70-51cc348bb7a6/bin/utaipan-UUZaoUuFF8/data/206bfaa2b/1c732245e30b43709b42fcb80a49c5c2 [2021-11-07 02:19:50,473 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 02:19:50,475 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 02:19:50,476 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 02:19:50,476 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 02:19:50,480 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 02:19:50,481 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:19:50" (1/1) ... [2021-11-07 02:19:50,482 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@73311d14 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:19:50, skipping insertion in model container [2021-11-07 02:19:50,482 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:19:50" (1/1) ... [2021-11-07 02:19:50,489 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 02:19:50,554 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:19:51,019 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_68cf8e26-691a-4bb2-ab70-51cc348bb7a6/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test5-1.i[33021,33034] [2021-11-07 02:19:51,233 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_68cf8e26-691a-4bb2-ab70-51cc348bb7a6/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test5-1.i[49681,49694] [2021-11-07 02:19:51,242 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:19:51,266 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 02:19:51,266 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@6b0c25f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:19:51, skipping insertion in model container [2021-11-07 02:19:51,266 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 02:19:51,267 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 02:19:51,269 INFO L168 Benchmark]: Toolchain (without parser) took 793.36 ms. Allocated memory is still 98.6 MB. Free memory was 62.0 MB in the beginning and 59.6 MB in the end (delta: 2.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-11-07 02:19:51,270 INFO L168 Benchmark]: CDTParser took 1.05 ms. Allocated memory is still 98.6 MB. Free memory is still 54.0 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 02:19:51,271 INFO L168 Benchmark]: CACSL2BoogieTranslator took 790.63 ms. Allocated memory is still 98.6 MB. Free memory was 61.7 MB in the beginning and 59.6 MB in the end (delta: 2.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-11-07 02:19:51,272 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.05 ms. Allocated memory is still 98.6 MB. Free memory is still 54.0 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 790.63 ms. Allocated memory is still 98.6 MB. Free memory was 61.7 MB in the beginning and 59.6 MB in the end (delta: 2.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 737]: 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_68cf8e26-691a-4bb2-ab70-51cc348bb7a6/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cf8e26-691a-4bb2-ab70-51cc348bb7a6/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_68cf8e26-691a-4bb2-ab70-51cc348bb7a6/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cf8e26-691a-4bb2-ab70-51cc348bb7a6/bin/utaipan-UUZaoUuFF8/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test5-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cf8e26-691a-4bb2-ab70-51cc348bb7a6/bin/utaipan-UUZaoUuFF8/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cf8e26-691a-4bb2-ab70-51cc348bb7a6/bin/utaipan-UUZaoUuFF8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 9fd228108b00a337c799c923821cefd2f3f25ea1b43eb489705884efe2b6ca03 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 02:19:53,463 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 02:19:53,466 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 02:19:53,526 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 02:19:53,527 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 02:19:53,531 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 02:19:53,533 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 02:19:53,537 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 02:19:53,541 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 02:19:53,548 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 02:19:53,550 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 02:19:53,552 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 02:19:53,553 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 02:19:53,556 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 02:19:53,559 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 02:19:53,564 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 02:19:53,566 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 02:19:53,567 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 02:19:53,569 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 02:19:53,579 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 02:19:53,581 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 02:19:53,582 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 02:19:53,585 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 02:19:53,586 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 02:19:53,592 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 02:19:53,592 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 02:19:53,593 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 02:19:53,594 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 02:19:53,594 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 02:19:53,595 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 02:19:53,596 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 02:19:53,597 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 02:19:53,598 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 02:19:53,598 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 02:19:53,600 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 02:19:53,600 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 02:19:53,605 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 02:19:53,606 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 02:19:53,606 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 02:19:53,608 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 02:19:53,609 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 02:19:53,614 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cf8e26-691a-4bb2-ab70-51cc348bb7a6/bin/utaipan-UUZaoUuFF8/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2021-11-07 02:19:53,659 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 02:19:53,659 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 02:19:53,661 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 02:19:53,661 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 02:19:53,661 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 02:19:53,661 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 02:19:53,661 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 02:19:53,662 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 02:19:53,662 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 02:19:53,664 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-07 02:19:53,665 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-07 02:19:53,665 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 02:19:53,665 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 02:19:53,665 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-07 02:19:53,666 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 02:19:53,666 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 02:19:53,666 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 02:19:53,666 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-07 02:19:53,666 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-07 02:19:53,667 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-07 02:19:53,667 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 02:19:53,667 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 02:19:53,667 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 02:19:53,667 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 02:19:53,667 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 02:19:53,668 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 02:19:53,668 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 02:19:53,668 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 02:19:53,668 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 02:19:53,668 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:19:53,669 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 02:19:53,669 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 02:19:53,670 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 02:19:53,670 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 02:19:53,670 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 02:19:53,670 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 02:19:53,670 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_68cf8e26-691a-4bb2-ab70-51cc348bb7a6/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cf8e26-691a-4bb2-ab70-51cc348bb7a6/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9fd228108b00a337c799c923821cefd2f3f25ea1b43eb489705884efe2b6ca03 [2021-11-07 02:19:54,129 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 02:19:54,151 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 02:19:54,153 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 02:19:54,155 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 02:19:54,156 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 02:19:54,157 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cf8e26-691a-4bb2-ab70-51cc348bb7a6/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test5-1.i [2021-11-07 02:19:54,225 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cf8e26-691a-4bb2-ab70-51cc348bb7a6/bin/utaipan-UUZaoUuFF8/data/a7b041e32/30df2faa4c6f48eb8e8867a64a91f635/FLAGc8abfedf5 [2021-11-07 02:19:54,959 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 02:19:54,959 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cf8e26-691a-4bb2-ab70-51cc348bb7a6/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test5-1.i [2021-11-07 02:19:54,979 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cf8e26-691a-4bb2-ab70-51cc348bb7a6/bin/utaipan-UUZaoUuFF8/data/a7b041e32/30df2faa4c6f48eb8e8867a64a91f635/FLAGc8abfedf5 [2021-11-07 02:19:55,165 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cf8e26-691a-4bb2-ab70-51cc348bb7a6/bin/utaipan-UUZaoUuFF8/data/a7b041e32/30df2faa4c6f48eb8e8867a64a91f635 [2021-11-07 02:19:55,168 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 02:19:55,174 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 02:19:55,175 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 02:19:55,176 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 02:19:55,183 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 02:19:55,184 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:19:55" (1/1) ... [2021-11-07 02:19:55,186 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@27126aaf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:19:55, skipping insertion in model container [2021-11-07 02:19:55,186 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:19:55" (1/1) ... [2021-11-07 02:19:55,195 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 02:19:55,273 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:19:55,834 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_68cf8e26-691a-4bb2-ab70-51cc348bb7a6/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test5-1.i[33021,33034] [2021-11-07 02:19:56,093 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_68cf8e26-691a-4bb2-ab70-51cc348bb7a6/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test5-1.i[49681,49694] [2021-11-07 02:19:56,102 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:19:56,122 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 02:19:56,138 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:19:56,156 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_68cf8e26-691a-4bb2-ab70-51cc348bb7a6/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test5-1.i[33021,33034] [2021-11-07 02:19:56,298 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_68cf8e26-691a-4bb2-ab70-51cc348bb7a6/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test5-1.i[49681,49694] [2021-11-07 02:19:56,302 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:19:56,317 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 02:19:56,365 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_68cf8e26-691a-4bb2-ab70-51cc348bb7a6/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test5-1.i[33021,33034] [2021-11-07 02:19:56,454 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_68cf8e26-691a-4bb2-ab70-51cc348bb7a6/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test5-1.i[49681,49694] [2021-11-07 02:19:56,457 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:19:56,499 INFO L208 MainTranslator]: Completed translation [2021-11-07 02:19:56,499 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:19:56 WrapperNode [2021-11-07 02:19:56,499 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 02:19:56,500 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 02:19:56,500 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 02:19:56,501 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 02:19:56,508 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:19:56" (1/1) ... [2021-11-07 02:19:56,549 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:19:56" (1/1) ... [2021-11-07 02:19:56,646 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 02:19:56,647 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 02:19:56,647 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 02:19:56,648 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 02:19:56,656 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:19:56" (1/1) ... [2021-11-07 02:19:56,657 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:19:56" (1/1) ... [2021-11-07 02:19:56,672 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:19:56" (1/1) ... [2021-11-07 02:19:56,672 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:19:56" (1/1) ... [2021-11-07 02:19:56,747 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:19:56" (1/1) ... [2021-11-07 02:19:56,765 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:19:56" (1/1) ... [2021-11-07 02:19:56,771 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:19:56" (1/1) ... [2021-11-07 02:19:56,784 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 02:19:56,785 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 02:19:56,785 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 02:19:56,786 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 02:19:56,789 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:19:56" (1/1) ... [2021-11-07 02:19:56,808 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:19:56,817 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cf8e26-691a-4bb2-ab70-51cc348bb7a6/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:19:56,829 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cf8e26-691a-4bb2-ab70-51cc348bb7a6/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 02:19:56,835 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cf8e26-691a-4bb2-ab70-51cc348bb7a6/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 02:19:56,868 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-07 02:19:56,869 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-07 02:19:56,869 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-07 02:19:56,869 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-07 02:19:56,869 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 02:19:56,869 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-11-07 02:19:56,869 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-07 02:19:56,870 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-07 02:19:56,870 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-07 02:19:56,870 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 02:19:56,870 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 02:19:56,870 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 02:20:04,395 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 02:20:04,396 INFO L299 CfgBuilder]: Removed 111 assume(true) statements. [2021-11-07 02:20:04,405 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:20:04 BoogieIcfgContainer [2021-11-07 02:20:04,405 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 02:20:04,408 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 02:20:04,408 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 02:20:04,411 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 02:20:04,411 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 02:19:55" (1/3) ... [2021-11-07 02:20:04,412 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@649a7e8e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:20:04, skipping insertion in model container [2021-11-07 02:20:04,413 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:19:56" (2/3) ... [2021-11-07 02:20:04,413 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@649a7e8e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:20:04, skipping insertion in model container [2021-11-07 02:20:04,413 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:20:04" (3/3) ... [2021-11-07 02:20:04,416 INFO L111 eAbstractionObserver]: Analyzing ICFG uthash_OAT_test5-1.i [2021-11-07 02:20:04,422 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 02:20:04,423 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 733 error locations. [2021-11-07 02:20:04,486 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 02:20:04,492 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=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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 02:20:04,501 INFO L340 AbstractCegarLoop]: Starting to check reachability of 733 error locations. [2021-11-07 02:20:04,554 INFO L276 IsEmpty]: Start isEmpty. Operand has 1473 states, 739 states have (on average 2.230040595399188) internal successors, (1648), 1472 states have internal predecessors, (1648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:20:04,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-07 02:20:04,560 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:20:04,560 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-07 02:20:04,561 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 729 more)] === [2021-11-07 02:20:04,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:20:04,566 INFO L85 PathProgramCache]: Analyzing trace with hash 28698764, now seen corresponding path program 1 times [2021-11-07 02:20:04,579 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:20:04,579 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [452170731] [2021-11-07 02:20:04,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:20:04,581 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:20:04,581 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cf8e26-691a-4bb2-ab70-51cc348bb7a6/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:20:04,584 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cf8e26-691a-4bb2-ab70-51cc348bb7a6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:20:04,604 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cf8e26-691a-4bb2-ab70-51cc348bb7a6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 02:20:04,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:20:04,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-07 02:20:04,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:20:04,839 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 02:20:04,839 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:20:04,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:20:04,853 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:20:04,854 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [452170731] [2021-11-07 02:20:04,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [452170731] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:20:04,855 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:20:04,855 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 02:20:04,857 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482907716] [2021-11-07 02:20:04,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 02:20:04,862 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:20:04,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 02:20:04,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 02:20:04,899 INFO L87 Difference]: Start difference. First operand has 1473 states, 739 states have (on average 2.230040595399188) internal successors, (1648), 1472 states have internal predecessors, (1648), 0 states have call successors, (0), 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 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:20:05,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:20:05,053 INFO L93 Difference]: Finished difference Result 1455 states and 1534 transitions. [2021-11-07 02:20:05,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 02:20:05,054 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 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 5 [2021-11-07 02:20:05,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:20:05,083 INFO L225 Difference]: With dead ends: 1455 [2021-11-07 02:20:05,084 INFO L226 Difference]: Without dead ends: 1453 [2021-11-07 02:20:05,085 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 8 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 02:20:05,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1453 states. [2021-11-07 02:20:05,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1453 to 1453. [2021-11-07 02:20:05,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1453 states, 730 states have (on average 2.0986301369863014) internal successors, (1532), 1452 states have internal predecessors, (1532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:20:05,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1453 states to 1453 states and 1532 transitions. [2021-11-07 02:20:05,208 INFO L78 Accepts]: Start accepts. Automaton has 1453 states and 1532 transitions. Word has length 5 [2021-11-07 02:20:05,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:20:05,209 INFO L470 AbstractCegarLoop]: Abstraction has 1453 states and 1532 transitions. [2021-11-07 02:20:05,209 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:20:05,209 INFO L276 IsEmpty]: Start isEmpty. Operand 1453 states and 1532 transitions. [2021-11-07 02:20:05,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-07 02:20:05,210 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:20:05,210 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-07 02:20:05,230 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cf8e26-691a-4bb2-ab70-51cc348bb7a6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 02:20:05,426 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cf8e26-691a-4bb2-ab70-51cc348bb7a6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:20:05,426 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 729 more)] === [2021-11-07 02:20:05,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:20:05,427 INFO L85 PathProgramCache]: Analyzing trace with hash 28698826, now seen corresponding path program 1 times [2021-11-07 02:20:05,427 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:20:05,427 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1470175811] [2021-11-07 02:20:05,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:20:05,428 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:20:05,428 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cf8e26-691a-4bb2-ab70-51cc348bb7a6/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:20:05,429 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cf8e26-691a-4bb2-ab70-51cc348bb7a6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:20:05,432 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cf8e26-691a-4bb2-ab70-51cc348bb7a6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 02:20:05,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:20:05,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:20:05,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:20:05,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 02:20:05,646 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 02:20:05,647 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:20:05,676 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 02:20:05,677 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:20:05,677 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1470175811] [2021-11-07 02:20:05,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1470175811] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:20:05,678 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:20:05,678 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 02:20:05,678 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300957333] [2021-11-07 02:20:05,680 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:20:05,680 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:20:05,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:20:05,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:20:05,682 INFO L87 Difference]: Start difference. First operand 1453 states and 1532 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:20:09,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:20:09,061 INFO L93 Difference]: Finished difference Result 1719 states and 1836 transitions. [2021-11-07 02:20:09,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:20:09,062 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 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 5 [2021-11-07 02:20:09,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:20:09,074 INFO L225 Difference]: With dead ends: 1719 [2021-11-07 02:20:09,075 INFO L226 Difference]: Without dead ends: 1719 [2021-11-07 02:20:09,076 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 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 02:20:09,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1719 states. [2021-11-07 02:20:09,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1719 to 1438. [2021-11-07 02:20:09,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1438 states, 806 states have (on average 1.9553349875930521) internal successors, (1576), 1437 states have internal predecessors, (1576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:20:09,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1438 states to 1438 states and 1576 transitions. [2021-11-07 02:20:09,121 INFO L78 Accepts]: Start accepts. Automaton has 1438 states and 1576 transitions. Word has length 5 [2021-11-07 02:20:09,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:20:09,121 INFO L470 AbstractCegarLoop]: Abstraction has 1438 states and 1576 transitions. [2021-11-07 02:20:09,122 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:20:09,122 INFO L276 IsEmpty]: Start isEmpty. Operand 1438 states and 1576 transitions. [2021-11-07 02:20:09,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-07 02:20:09,123 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:20:09,123 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-07 02:20:09,138 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cf8e26-691a-4bb2-ab70-51cc348bb7a6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 02:20:09,337 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cf8e26-691a-4bb2-ab70-51cc348bb7a6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:20:09,337 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 729 more)] === [2021-11-07 02:20:09,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:20:09,338 INFO L85 PathProgramCache]: Analyzing trace with hash 28698827, now seen corresponding path program 1 times [2021-11-07 02:20:09,338 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:20:09,339 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1069339153] [2021-11-07 02:20:09,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:20:09,339 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:20:09,340 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cf8e26-691a-4bb2-ab70-51cc348bb7a6/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:20:09,341 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cf8e26-691a-4bb2-ab70-51cc348bb7a6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:20:09,346 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cf8e26-691a-4bb2-ab70-51cc348bb7a6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 02:20:09,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:20:09,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 02:20:09,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:20:09,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 02:20:09,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:20:09,549 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:20:09,620 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 02:20:09,620 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:20:09,620 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1069339153] [2021-11-07 02:20:09,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1069339153] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:20:09,621 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:20:09,621 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-07 02:20:09,621 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815015431] [2021-11-07 02:20:09,621 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:20:09,622 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:20:09,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:20:09,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:20:09,623 INFO L87 Difference]: Start difference. First operand 1438 states and 1576 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:20:17,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:20:17,463 INFO L93 Difference]: Finished difference Result 2024 states and 2207 transitions. [2021-11-07 02:20:17,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:20:17,464 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 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 5 [2021-11-07 02:20:17,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:20:17,474 INFO L225 Difference]: With dead ends: 2024 [2021-11-07 02:20:17,475 INFO L226 Difference]: Without dead ends: 2024 [2021-11-07 02:20:17,475 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 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 02:20:17,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2024 states. [2021-11-07 02:20:17,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2024 to 1594. [2021-11-07 02:20:17,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1594 states, 972 states have (on average 1.9362139917695473) internal successors, (1882), 1593 states have internal predecessors, (1882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:20:17,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1594 states to 1594 states and 1882 transitions. [2021-11-07 02:20:17,517 INFO L78 Accepts]: Start accepts. Automaton has 1594 states and 1882 transitions. Word has length 5 [2021-11-07 02:20:17,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:20:17,518 INFO L470 AbstractCegarLoop]: Abstraction has 1594 states and 1882 transitions. [2021-11-07 02:20:17,518 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:20:17,518 INFO L276 IsEmpty]: Start isEmpty. Operand 1594 states and 1882 transitions. [2021-11-07 02:20:17,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-07 02:20:17,519 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:20:17,519 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-07 02:20:17,533 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cf8e26-691a-4bb2-ab70-51cc348bb7a6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 02:20:17,730 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cf8e26-691a-4bb2-ab70-51cc348bb7a6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:20:17,730 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr640REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 729 more)] === [2021-11-07 02:20:17,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:20:17,731 INFO L85 PathProgramCache]: Analyzing trace with hash 891404513, now seen corresponding path program 1 times [2021-11-07 02:20:17,731 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:20:17,731 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1694672581] [2021-11-07 02:20:17,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:20:17,732 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:20:17,732 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cf8e26-691a-4bb2-ab70-51cc348bb7a6/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:20:17,733 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cf8e26-691a-4bb2-ab70-51cc348bb7a6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:20:17,734 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cf8e26-691a-4bb2-ab70-51cc348bb7a6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 02:20:17,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:20:17,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:20:17,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:20:17,897 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 02:20:17,898 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:20:17,923 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 02:20:17,923 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:20:17,923 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1694672581] [2021-11-07 02:20:17,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1694672581] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:20:17,924 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:20:17,924 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:20:17,924 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903982272] [2021-11-07 02:20:17,925 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:20:17,925 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:20:17,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:20:17,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:20:17,926 INFO L87 Difference]: Start difference. First operand 1594 states and 1882 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:20:18,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:20:18,080 INFO L93 Difference]: Finished difference Result 3184 states and 3759 transitions. [2021-11-07 02:20:18,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:20:18,080 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 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 6 [2021-11-07 02:20:18,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:20:18,097 INFO L225 Difference]: With dead ends: 3184 [2021-11-07 02:20:18,098 INFO L226 Difference]: Without dead ends: 3184 [2021-11-07 02:20:18,098 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 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 02:20:18,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3184 states. [2021-11-07 02:20:18,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3184 to 2557. [2021-11-07 02:20:18,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2557 states, 1935 states have (on average 1.9395348837209303) internal successors, (3753), 2556 states have internal predecessors, (3753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:20:18,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2557 states to 2557 states and 3753 transitions. [2021-11-07 02:20:18,171 INFO L78 Accepts]: Start accepts. Automaton has 2557 states and 3753 transitions. Word has length 6 [2021-11-07 02:20:18,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:20:18,171 INFO L470 AbstractCegarLoop]: Abstraction has 2557 states and 3753 transitions. [2021-11-07 02:20:18,171 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:20:18,171 INFO L276 IsEmpty]: Start isEmpty. Operand 2557 states and 3753 transitions. [2021-11-07 02:20:18,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-07 02:20:18,172 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:20:18,172 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:20:18,185 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cf8e26-691a-4bb2-ab70-51cc348bb7a6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2021-11-07 02:20:18,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cf8e26-691a-4bb2-ab70-51cc348bb7a6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:20:18,383 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 729 more)] === [2021-11-07 02:20:18,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:20:18,384 INFO L85 PathProgramCache]: Analyzing trace with hash 2013913556, now seen corresponding path program 1 times [2021-11-07 02:20:18,385 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:20:18,385 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [233938853] [2021-11-07 02:20:18,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:20:18,385 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:20:18,386 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cf8e26-691a-4bb2-ab70-51cc348bb7a6/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:20:18,386 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cf8e26-691a-4bb2-ab70-51cc348bb7a6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:20:18,397 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cf8e26-691a-4bb2-ab70-51cc348bb7a6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 02:20:18,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:20:18,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:20:18,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:20:18,579 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 02:20:18,579 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:20:18,610 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 02:20:18,610 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:20:18,610 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [233938853] [2021-11-07 02:20:18,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [233938853] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:20:18,611 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:20:18,611 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:20:18,611 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846620405] [2021-11-07 02:20:18,611 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:20:18,612 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:20:18,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:20:18,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:20:18,613 INFO L87 Difference]: Start difference. First operand 2557 states and 3753 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:20:18,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:20:18,658 INFO L93 Difference]: Finished difference Result 2497 states and 3667 transitions. [2021-11-07 02:20:18,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:20:18,659 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 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 11 [2021-11-07 02:20:18,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:20:18,674 INFO L225 Difference]: With dead ends: 2497 [2021-11-07 02:20:18,674 INFO L226 Difference]: Without dead ends: 2497 [2021-11-07 02:20:18,674 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 18 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 02:20:18,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2497 states. [2021-11-07 02:20:18,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2497 to 2497. [2021-11-07 02:20:18,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2497 states, 1899 states have (on average 1.9310163243812533) internal successors, (3667), 2496 states have internal predecessors, (3667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:20:18,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2497 states to 2497 states and 3667 transitions. [2021-11-07 02:20:18,734 INFO L78 Accepts]: Start accepts. Automaton has 2497 states and 3667 transitions. Word has length 11 [2021-11-07 02:20:18,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:20:18,735 INFO L470 AbstractCegarLoop]: Abstraction has 2497 states and 3667 transitions. [2021-11-07 02:20:18,735 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:20:18,735 INFO L276 IsEmpty]: Start isEmpty. Operand 2497 states and 3667 transitions. [2021-11-07 02:20:18,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-07 02:20:18,736 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:20:18,736 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:20:18,756 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cf8e26-691a-4bb2-ab70-51cc348bb7a6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 02:20:18,952 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cf8e26-691a-4bb2-ab70-51cc348bb7a6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:20:18,953 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 729 more)] === [2021-11-07 02:20:18,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:20:18,953 INFO L85 PathProgramCache]: Analyzing trace with hash -1659327634, now seen corresponding path program 1 times [2021-11-07 02:20:18,954 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:20:18,955 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1412929191] [2021-11-07 02:20:18,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:20:18,955 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:20:18,955 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cf8e26-691a-4bb2-ab70-51cc348bb7a6/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:20:18,956 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cf8e26-691a-4bb2-ab70-51cc348bb7a6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:20:18,996 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cf8e26-691a-4bb2-ab70-51cc348bb7a6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 02:20:19,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:20:19,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 02:20:19,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:20:19,200 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 02:20:19,200 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:20:19,270 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 02:20:19,271 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:20:19,271 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1412929191] [2021-11-07 02:20:19,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1412929191] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:20:19,271 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:20:19,271 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-07 02:20:19,272 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273951390] [2021-11-07 02:20:19,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 02:20:19,273 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:20:19,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 02:20:19,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-07 02:20:19,275 INFO L87 Difference]: Start difference. First operand 2497 states and 3667 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:20:19,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:20:19,390 INFO L93 Difference]: Finished difference Result 2469 states and 3611 transitions. [2021-11-07 02:20:19,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:20:19,391 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 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 13 [2021-11-07 02:20:19,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:20:19,406 INFO L225 Difference]: With dead ends: 2469 [2021-11-07 02:20:19,406 INFO L226 Difference]: Without dead ends: 2469 [2021-11-07 02:20:19,410 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:20:19,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2469 states. [2021-11-07 02:20:19,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2469 to 2467. [2021-11-07 02:20:19,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2467 states, 1883 states have (on average 1.916622411046203) internal successors, (3609), 2466 states have internal predecessors, (3609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:20:19,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2467 states to 2467 states and 3609 transitions. [2021-11-07 02:20:19,484 INFO L78 Accepts]: Start accepts. Automaton has 2467 states and 3609 transitions. Word has length 13 [2021-11-07 02:20:19,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:20:19,484 INFO L470 AbstractCegarLoop]: Abstraction has 2467 states and 3609 transitions. [2021-11-07 02:20:19,485 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:20:19,485 INFO L276 IsEmpty]: Start isEmpty. Operand 2467 states and 3609 transitions. [2021-11-07 02:20:19,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-07 02:20:19,486 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:20:19,486 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] [2021-11-07 02:20:19,502 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cf8e26-691a-4bb2-ab70-51cc348bb7a6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 02:20:19,698 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cf8e26-691a-4bb2-ab70-51cc348bb7a6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:20:19,699 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr42REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 729 more)] === [2021-11-07 02:20:19,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:20:19,700 INFO L85 PathProgramCache]: Analyzing trace with hash 913198236, now seen corresponding path program 1 times [2021-11-07 02:20:19,700 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:20:19,701 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [12076319] [2021-11-07 02:20:19,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:20:19,701 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:20:19,701 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cf8e26-691a-4bb2-ab70-51cc348bb7a6/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:20:19,702 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cf8e26-691a-4bb2-ab70-51cc348bb7a6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:20:19,725 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cf8e26-691a-4bb2-ab70-51cc348bb7a6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 02:20:19,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:20:19,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 02:20:19,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:20:19,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 02:20:20,045 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 02:20:20,045 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:20:20,158 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 02:20:20,158 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:20:20,158 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [12076319] [2021-11-07 02:20:20,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [12076319] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:20:20,159 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:20:20,159 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:20:20,159 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572462024] [2021-11-07 02:20:20,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:20:20,159 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:20:20,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:20:20,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:20:20,160 INFO L87 Difference]: Start difference. First operand 2467 states and 3609 transitions. Second operand has 4 states, 3 states have (on average 9.0) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:20:23,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:20:23,714 INFO L93 Difference]: Finished difference Result 3811 states and 5399 transitions. [2021-11-07 02:20:23,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:20:23,714 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 9.0) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 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 27 [2021-11-07 02:20:23,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:20:23,737 INFO L225 Difference]: With dead ends: 3811 [2021-11-07 02:20:23,737 INFO L226 Difference]: Without dead ends: 3811 [2021-11-07 02:20:23,738 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 49 SyntacticMatches, 1 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 02:20:23,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3811 states. [2021-11-07 02:20:23,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3811 to 2463. [2021-11-07 02:20:23,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2463 states, 1883 states have (on average 1.9123738714816783) internal successors, (3601), 2462 states have internal predecessors, (3601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:20:23,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2463 states to 2463 states and 3601 transitions. [2021-11-07 02:20:23,805 INFO L78 Accepts]: Start accepts. Automaton has 2463 states and 3601 transitions. Word has length 27 [2021-11-07 02:20:23,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:20:23,805 INFO L470 AbstractCegarLoop]: Abstraction has 2463 states and 3601 transitions. [2021-11-07 02:20:23,806 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 9.0) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:20:23,806 INFO L276 IsEmpty]: Start isEmpty. Operand 2463 states and 3601 transitions. [2021-11-07 02:20:23,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-07 02:20:23,807 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:20:23,807 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] [2021-11-07 02:20:23,824 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cf8e26-691a-4bb2-ab70-51cc348bb7a6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 02:20:24,018 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cf8e26-691a-4bb2-ab70-51cc348bb7a6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:20:24,019 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr43REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 729 more)] === [2021-11-07 02:20:24,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:20:24,019 INFO L85 PathProgramCache]: Analyzing trace with hash 913198237, now seen corresponding path program 1 times [2021-11-07 02:20:24,020 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:20:24,020 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [681676969] [2021-11-07 02:20:24,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:20:24,020 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:20:24,020 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cf8e26-691a-4bb2-ab70-51cc348bb7a6/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:20:24,021 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cf8e26-691a-4bb2-ab70-51cc348bb7a6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:20:24,039 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cf8e26-691a-4bb2-ab70-51cc348bb7a6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 02:20:24,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:20:24,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:20:24,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:20:24,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 02:20:24,486 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 02:20:24,487 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:20:24,919 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 02:20:24,919 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:20:24,919 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [681676969] [2021-11-07 02:20:24,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [681676969] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:20:24,920 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:20:24,920 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-07 02:20:24,920 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252706318] [2021-11-07 02:20:24,920 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:20:24,920 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:20:24,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:20:24,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:20:24,921 INFO L87 Difference]: Start difference. First operand 2463 states and 3601 transitions. Second operand has 6 states, 5 states have (on average 10.4) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:20:34,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:20:34,576 INFO L93 Difference]: Finished difference Result 3066 states and 4239 transitions. [2021-11-07 02:20:34,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 02:20:34,577 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 10.4) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-11-07 02:20:34,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:20:34,594 INFO L225 Difference]: With dead ends: 3066 [2021-11-07 02:20:34,594 INFO L226 Difference]: Without dead ends: 3066 [2021-11-07 02:20:34,595 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-07 02:20:34,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3066 states. [2021-11-07 02:20:34,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3066 to 2459. [2021-11-07 02:20:34,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2459 states, 1883 states have (on average 1.9081253319171534) internal successors, (3593), 2458 states have internal predecessors, (3593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:20:34,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2459 states to 2459 states and 3593 transitions. [2021-11-07 02:20:34,679 INFO L78 Accepts]: Start accepts. Automaton has 2459 states and 3593 transitions. Word has length 27 [2021-11-07 02:20:34,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:20:34,680 INFO L470 AbstractCegarLoop]: Abstraction has 2459 states and 3593 transitions. [2021-11-07 02:20:34,680 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 10.4) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:20:34,680 INFO L276 IsEmpty]: Start isEmpty. Operand 2459 states and 3593 transitions. [2021-11-07 02:20:34,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-07 02:20:34,681 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:20:34,682 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] [2021-11-07 02:20:34,697 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cf8e26-691a-4bb2-ab70-51cc348bb7a6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 02:20:34,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cf8e26-691a-4bb2-ab70-51cc348bb7a6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:20:34,899 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr107REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 729 more)] === [2021-11-07 02:20:34,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:20:34,900 INFO L85 PathProgramCache]: Analyzing trace with hash 944973104, now seen corresponding path program 1 times [2021-11-07 02:20:34,900 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:20:34,900 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1505704554] [2021-11-07 02:20:34,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:20:34,901 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:20:34,901 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cf8e26-691a-4bb2-ab70-51cc348bb7a6/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:20:34,901 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cf8e26-691a-4bb2-ab70-51cc348bb7a6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:20:34,902 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cf8e26-691a-4bb2-ab70-51cc348bb7a6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 02:20:35,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:20:35,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 02:20:35,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:20:35,293 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 02:20:35,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:20:35,428 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 02:20:35,429 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:20:35,429 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1505704554] [2021-11-07 02:20:35,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1505704554] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:20:35,429 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:20:35,430 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 02:20:35,430 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748978573] [2021-11-07 02:20:35,432 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:20:35,432 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:20:35,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:20:35,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:20:35,433 INFO L87 Difference]: Start difference. First operand 2459 states and 3593 transitions. Second operand has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:20:35,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:20:35,507 INFO L93 Difference]: Finished difference Result 2447 states and 3573 transitions. [2021-11-07 02:20:35,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:20:35,508 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 0 states have call successors, (0), 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 42 [2021-11-07 02:20:35,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:20:35,523 INFO L225 Difference]: With dead ends: 2447 [2021-11-07 02:20:35,523 INFO L226 Difference]: Without dead ends: 2447 [2021-11-07 02:20:35,524 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 80 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 02:20:35,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2447 states. [2021-11-07 02:20:35,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2447 to 2447. [2021-11-07 02:20:35,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2447 states, 1871 states have (on average 1.9096739711384287) internal successors, (3573), 2446 states have internal predecessors, (3573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:20:35,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2447 states to 2447 states and 3573 transitions. [2021-11-07 02:20:35,576 INFO L78 Accepts]: Start accepts. Automaton has 2447 states and 3573 transitions. Word has length 42 [2021-11-07 02:20:35,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:20:35,578 INFO L470 AbstractCegarLoop]: Abstraction has 2447 states and 3573 transitions. [2021-11-07 02:20:35,578 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:20:35,578 INFO L276 IsEmpty]: Start isEmpty. Operand 2447 states and 3573 transitions. [2021-11-07 02:20:35,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-07 02:20:35,583 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:20:35,584 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:20:35,604 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cf8e26-691a-4bb2-ab70-51cc348bb7a6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 02:20:35,793 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cf8e26-691a-4bb2-ab70-51cc348bb7a6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:20:35,793 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr107REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 729 more)] === [2021-11-07 02:20:35,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:20:35,793 INFO L85 PathProgramCache]: Analyzing trace with hash 29098340, now seen corresponding path program 1 times [2021-11-07 02:20:35,794 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:20:35,794 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1441303782] [2021-11-07 02:20:35,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:20:35,794 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:20:35,794 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cf8e26-691a-4bb2-ab70-51cc348bb7a6/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:20:35,795 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cf8e26-691a-4bb2-ab70-51cc348bb7a6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:20:35,797 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cf8e26-691a-4bb2-ab70-51cc348bb7a6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 02:20:36,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:20:36,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 02:20:36,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:20:36,482 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 02:20:36,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:20:36,869 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 02:20:36,869 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:20:36,870 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1441303782] [2021-11-07 02:20:36,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1441303782] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:20:36,870 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:20:36,870 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:20:36,870 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166688721] [2021-11-07 02:20:36,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:20:36,871 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:20:36,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:20:36,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:20:36,871 INFO L87 Difference]: Start difference. First operand 2447 states and 3573 transitions. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:20:36,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:20:36,963 INFO L93 Difference]: Finished difference Result 2263 states and 3218 transitions. [2021-11-07 02:20:36,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:20:36,964 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-11-07 02:20:36,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:20:36,977 INFO L225 Difference]: With dead ends: 2263 [2021-11-07 02:20:36,977 INFO L226 Difference]: Without dead ends: 2263 [2021-11-07 02:20:36,977 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 97 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 02:20:36,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2263 states. [2021-11-07 02:20:37,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2263 to 2263. [2021-11-07 02:20:37,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2263 states, 1687 states have (on average 1.9075281564908122) internal successors, (3218), 2262 states have internal predecessors, (3218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:20:37,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2263 states to 2263 states and 3218 transitions. [2021-11-07 02:20:37,017 INFO L78 Accepts]: Start accepts. Automaton has 2263 states and 3218 transitions. Word has length 50 [2021-11-07 02:20:37,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:20:37,018 INFO L470 AbstractCegarLoop]: Abstraction has 2263 states and 3218 transitions. [2021-11-07 02:20:37,018 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:20:37,018 INFO L276 IsEmpty]: Start isEmpty. Operand 2263 states and 3218 transitions. [2021-11-07 02:20:37,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-07 02:20:37,019 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:20:37,019 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 02:20:37,036 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cf8e26-691a-4bb2-ab70-51cc348bb7a6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 02:20:37,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cf8e26-691a-4bb2-ab70-51cc348bb7a6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:20:37,236 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr61REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 729 more)] === [2021-11-07 02:20:37,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:20:37,236 INFO L85 PathProgramCache]: Analyzing trace with hash -839399161, now seen corresponding path program 1 times [2021-11-07 02:20:37,237 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:20:37,237 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1254635436] [2021-11-07 02:20:37,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:20:37,238 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:20:37,239 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cf8e26-691a-4bb2-ab70-51cc348bb7a6/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:20:37,240 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cf8e26-691a-4bb2-ab70-51cc348bb7a6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:20:37,270 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cf8e26-691a-4bb2-ab70-51cc348bb7a6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 02:20:37,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:20:37,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 02:20:37,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:20:37,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 02:20:37,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 02:20:38,400 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-07 02:20:38,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2021-11-07 02:20:38,408 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-07 02:20:38,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 21 [2021-11-07 02:20:38,437 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 02:20:38,437 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:20:43,314 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 02:20:43,315 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:20:43,315 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1254635436] [2021-11-07 02:20:43,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1254635436] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:20:43,315 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:20:43,316 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-07 02:20:43,316 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165901445] [2021-11-07 02:20:43,316 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:20:43,316 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:20:43,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:20:43,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=16, Unknown=1, NotChecked=0, Total=30 [2021-11-07 02:20:43,318 INFO L87 Difference]: Start difference. First operand 2263 states and 3218 transitions. Second operand has 6 states, 5 states have (on average 20.8) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:21:05,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:21:05,024 INFO L93 Difference]: Finished difference Result 4001 states and 5509 transitions. [2021-11-07 02:21:05,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 02:21:05,025 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 20.8) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 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 02:21:05,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:21:05,040 INFO L225 Difference]: With dead ends: 4001 [2021-11-07 02:21:05,040 INFO L226 Difference]: Without dead ends: 4001 [2021-11-07 02:21:05,040 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=26, Invalid=28, Unknown=2, NotChecked=0, Total=56 [2021-11-07 02:21:05,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4001 states. [2021-11-07 02:21:05,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4001 to 2421. [2021-11-07 02:21:05,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2421 states, 1883 states have (on average 1.8608603292618162) internal successors, (3504), 2420 states have internal predecessors, (3504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:21:05,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2421 states to 2421 states and 3504 transitions. [2021-11-07 02:21:05,104 INFO L78 Accepts]: Start accepts. Automaton has 2421 states and 3504 transitions. Word has length 53 [2021-11-07 02:21:05,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:21:05,105 INFO L470 AbstractCegarLoop]: Abstraction has 2421 states and 3504 transitions. [2021-11-07 02:21:05,105 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 20.8) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:21:05,105 INFO L276 IsEmpty]: Start isEmpty. Operand 2421 states and 3504 transitions. [2021-11-07 02:21:05,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-07 02:21:05,109 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:21:05,109 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] [2021-11-07 02:21:05,125 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cf8e26-691a-4bb2-ab70-51cc348bb7a6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 02:21:05,309 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cf8e26-691a-4bb2-ab70-51cc348bb7a6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:21:05,310 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr66ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 729 more)] === [2021-11-07 02:21:05,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:21:05,310 INFO L85 PathProgramCache]: Analyzing trace with hash -416260760, now seen corresponding path program 1 times [2021-11-07 02:21:05,311 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:21:05,311 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1590564984] [2021-11-07 02:21:05,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:21:05,311 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:21:05,311 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cf8e26-691a-4bb2-ab70-51cc348bb7a6/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:21:05,312 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cf8e26-691a-4bb2-ab70-51cc348bb7a6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:21:05,314 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cf8e26-691a-4bb2-ab70-51cc348bb7a6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 02:21:05,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:21:05,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:21:05,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:21:05,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 02:21:05,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-07 02:21:05,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-07 02:21:05,930 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 02:21:05,930 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:21:06,065 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 02:21:06,065 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:21:06,065 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1590564984] [2021-11-07 02:21:06,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1590564984] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:21:06,066 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:21:06,066 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-07 02:21:06,066 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477648740] [2021-11-07 02:21:06,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:21:06,067 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:21:06,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:21:06,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:21:06,067 INFO L87 Difference]: Start difference. First operand 2421 states and 3504 transitions. Second operand has 6 states, 5 states have (on average 11.8) 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 02:21:12,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:21:12,852 INFO L93 Difference]: Finished difference Result 3353 states and 4702 transitions. [2021-11-07 02:21:12,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-07 02:21:12,853 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 11.8) 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 59 [2021-11-07 02:21:12,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:21:12,859 INFO L225 Difference]: With dead ends: 3353 [2021-11-07 02:21:12,859 INFO L226 Difference]: Without dead ends: 3353 [2021-11-07 02:21:12,859 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 110 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-11-07 02:21:12,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3353 states. [2021-11-07 02:21:12,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3353 to 2420. [2021-11-07 02:21:12,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2420 states, 1883 states have (on average 1.8597981943706852) internal successors, (3502), 2419 states have internal predecessors, (3502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:21:12,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2420 states to 2420 states and 3502 transitions. [2021-11-07 02:21:12,901 INFO L78 Accepts]: Start accepts. Automaton has 2420 states and 3502 transitions. Word has length 59 [2021-11-07 02:21:12,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:21:12,901 INFO L470 AbstractCegarLoop]: Abstraction has 2420 states and 3502 transitions. [2021-11-07 02:21:12,901 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 11.8) 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 02:21:12,902 INFO L276 IsEmpty]: Start isEmpty. Operand 2420 states and 3502 transitions. [2021-11-07 02:21:12,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-07 02:21:12,902 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:21:12,902 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] [2021-11-07 02:21:12,930 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cf8e26-691a-4bb2-ab70-51cc348bb7a6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-07 02:21:13,116 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cf8e26-691a-4bb2-ab70-51cc348bb7a6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:21:13,116 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr67ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 729 more)] === [2021-11-07 02:21:13,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:21:13,116 INFO L85 PathProgramCache]: Analyzing trace with hash -19181353, now seen corresponding path program 1 times [2021-11-07 02:21:13,117 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:21:13,117 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [412305993] [2021-11-07 02:21:13,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:21:13,117 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:21:13,117 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cf8e26-691a-4bb2-ab70-51cc348bb7a6/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:21:13,118 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cf8e26-691a-4bb2-ab70-51cc348bb7a6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:21:13,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cf8e26-691a-4bb2-ab70-51cc348bb7a6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 02:21:13,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:21:13,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 02:21:13,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:21:13,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 02:21:13,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-11-07 02:21:13,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-07 02:21:13,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 27 [2021-11-07 02:21:13,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2021-11-07 02:21:13,853 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 02:21:13,854 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:21:14,332 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 02:21:14,333 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:21:14,333 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [412305993] [2021-11-07 02:21:14,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [412305993] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:21:14,333 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:21:14,333 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-11-07 02:21:14,333 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659997424] [2021-11-07 02:21:14,334 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-07 02:21:14,334 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:21:14,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-07 02:21:14,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-07 02:21:14,335 INFO L87 Difference]: Start difference. First operand 2420 states and 3502 transitions. Second operand has 10 states, 9 states have (on average 7.666666666666667) internal successors, (69), 10 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 02:21:36,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:21:36,942 INFO L93 Difference]: Finished difference Result 3100 states and 4345 transitions. [2021-11-07 02:21:36,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-07 02:21:36,944 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 7.666666666666667) internal successors, (69), 10 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 60 [2021-11-07 02:21:36,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:21:36,951 INFO L225 Difference]: With dead ends: 3100 [2021-11-07 02:21:36,951 INFO L226 Difference]: Without dead ends: 3100 [2021-11-07 02:21:36,951 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-11-07 02:21:36,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3100 states. [2021-11-07 02:21:36,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3100 to 2419. [2021-11-07 02:21:36,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2419 states, 1883 states have (on average 1.858736059479554) internal successors, (3500), 2418 states have internal predecessors, (3500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:21:36,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2419 states to 2419 states and 3500 transitions. [2021-11-07 02:21:36,986 INFO L78 Accepts]: Start accepts. Automaton has 2419 states and 3500 transitions. Word has length 60 [2021-11-07 02:21:36,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:21:36,986 INFO L470 AbstractCegarLoop]: Abstraction has 2419 states and 3500 transitions. [2021-11-07 02:21:36,987 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 7.666666666666667) internal successors, (69), 10 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 02:21:36,987 INFO L276 IsEmpty]: Start isEmpty. Operand 2419 states and 3500 transitions. [2021-11-07 02:21:36,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-07 02:21:36,987 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:21:36,988 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:21:37,003 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cf8e26-691a-4bb2-ab70-51cc348bb7a6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-07 02:21:37,196 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cf8e26-691a-4bb2-ab70-51cc348bb7a6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:21:37,197 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr70REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 729 more)] === [2021-11-07 02:21:37,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:21:37,197 INFO L85 PathProgramCache]: Analyzing trace with hash -1927168386, now seen corresponding path program 1 times [2021-11-07 02:21:37,197 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:21:37,197 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1113476020] [2021-11-07 02:21:37,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:21:37,198 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:21:37,198 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cf8e26-691a-4bb2-ab70-51cc348bb7a6/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:21:37,213 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cf8e26-691a-4bb2-ab70-51cc348bb7a6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:21:37,229 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cf8e26-691a-4bb2-ab70-51cc348bb7a6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 02:21:37,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:21:37,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 02:21:37,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:21:37,840 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 02:21:37,840 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:21:37,966 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 02:21:37,966 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:21:37,966 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1113476020] [2021-11-07 02:21:37,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1113476020] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:21:37,967 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:21:37,967 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 02:21:37,967 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012534050] [2021-11-07 02:21:37,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:21:37,967 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:21:37,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:21:37,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:21:37,968 INFO L87 Difference]: Start difference. First operand 2419 states and 3500 transitions. Second operand has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 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 02:21:38,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:21:38,317 INFO L93 Difference]: Finished difference Result 4326 states and 6209 transitions. [2021-11-07 02:21:38,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 02:21:38,318 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 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 64 [2021-11-07 02:21:38,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:21:38,327 INFO L225 Difference]: With dead ends: 4326 [2021-11-07 02:21:38,328 INFO L226 Difference]: Without dead ends: 4326 [2021-11-07 02:21:38,329 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-11-07 02:21:38,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4326 states. [2021-11-07 02:21:38,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4326 to 2437. [2021-11-07 02:21:38,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2437 states, 1901 states have (on average 1.8506049447659128) internal successors, (3518), 2436 states have internal predecessors, (3518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:21:38,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2437 states to 2437 states and 3518 transitions. [2021-11-07 02:21:38,376 INFO L78 Accepts]: Start accepts. Automaton has 2437 states and 3518 transitions. Word has length 64 [2021-11-07 02:21:38,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:21:38,377 INFO L470 AbstractCegarLoop]: Abstraction has 2437 states and 3518 transitions. [2021-11-07 02:21:38,378 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 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 02:21:38,378 INFO L276 IsEmpty]: Start isEmpty. Operand 2437 states and 3518 transitions. [2021-11-07 02:21:38,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-07 02:21:38,378 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:21:38,378 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-07 02:21:38,388 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cf8e26-691a-4bb2-ab70-51cc348bb7a6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-07 02:21:38,579 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cf8e26-691a-4bb2-ab70-51cc348bb7a6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:21:38,579 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr70REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 729 more)] === [2021-11-07 02:21:38,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:21:38,579 INFO L85 PathProgramCache]: Analyzing trace with hash -938951394, now seen corresponding path program 1 times [2021-11-07 02:21:38,580 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:21:38,580 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [318329987] [2021-11-07 02:21:38,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:21:38,580 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:21:38,580 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cf8e26-691a-4bb2-ab70-51cc348bb7a6/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:21:38,581 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cf8e26-691a-4bb2-ab70-51cc348bb7a6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:21:38,582 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cf8e26-691a-4bb2-ab70-51cc348bb7a6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 02:21:39,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:21:39,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:21:39,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:21:39,306 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:21:39,306 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:21:39,560 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:21:39,560 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:21:39,560 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [318329987] [2021-11-07 02:21:39,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [318329987] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:21:39,561 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2125240123] [2021-11-07 02:21:39,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:21:39,561 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:21:39,561 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cf8e26-691a-4bb2-ab70-51cc348bb7a6/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:21:39,563 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cf8e26-691a-4bb2-ab70-51cc348bb7a6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:21:39,575 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cf8e26-691a-4bb2-ab70-51cc348bb7a6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-07 02:21:40,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:21:40,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:21:40,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:21:40,507 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:21:40,508 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:21:40,630 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:21:40,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2125240123] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:21:40,630 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259611264] [2021-11-07 02:21:40,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:21:40,631 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:21:40,631 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cf8e26-691a-4bb2-ab70-51cc348bb7a6/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:21:40,631 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cf8e26-691a-4bb2-ab70-51cc348bb7a6/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 02:21:40,632 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cf8e26-691a-4bb2-ab70-51cc348bb7a6/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-07 02:21:41,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:21:41,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 02:21:41,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:21:41,351 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:21:41,351 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:21:41,615 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:21:41,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1259611264] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:21:41,615 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 02:21:41,615 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 13 [2021-11-07 02:21:41,616 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582987257] [2021-11-07 02:21:41,616 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-07 02:21:41,616 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:21:41,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-07 02:21:41,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-11-07 02:21:41,617 INFO L87 Difference]: Start difference. First operand 2437 states and 3518 transitions. Second operand has 13 states, 13 states have (on average 5.923076923076923) internal successors, (77), 13 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:21:42,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:21:43,000 INFO L93 Difference]: Finished difference Result 6257 states and 8942 transitions. [2021-11-07 02:21:43,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-07 02:21:43,001 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.923076923076923) internal successors, (77), 13 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-11-07 02:21:43,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:21:43,013 INFO L225 Difference]: With dead ends: 6257 [2021-11-07 02:21:43,013 INFO L226 Difference]: Without dead ends: 6257 [2021-11-07 02:21:43,014 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 404 GetRequests, 382 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=188, Invalid=364, Unknown=0, NotChecked=0, Total=552 [2021-11-07 02:21:43,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6257 states. [2021-11-07 02:21:43,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6257 to 2491. [2021-11-07 02:21:43,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2491 states, 1955 states have (on average 1.8332480818414323) internal successors, (3584), 2490 states have internal predecessors, (3584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:21:43,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2491 states to 2491 states and 3584 transitions. [2021-11-07 02:21:43,072 INFO L78 Accepts]: Start accepts. Automaton has 2491 states and 3584 transitions. Word has length 66 [2021-11-07 02:21:43,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:21:43,073 INFO L470 AbstractCegarLoop]: Abstraction has 2491 states and 3584 transitions. [2021-11-07 02:21:43,073 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.923076923076923) internal successors, (77), 13 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:21:43,073 INFO L276 IsEmpty]: Start isEmpty. Operand 2491 states and 3584 transitions. [2021-11-07 02:21:43,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-07 02:21:43,074 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:21:43,074 INFO L513 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:21:43,129 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cf8e26-691a-4bb2-ab70-51cc348bb7a6/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-07 02:21:43,310 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cf8e26-691a-4bb2-ab70-51cc348bb7a6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-07 02:21:43,507 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cf8e26-691a-4bb2-ab70-51cc348bb7a6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (17)] Ended with exit code 0 [2021-11-07 02:21:43,701 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cf8e26-691a-4bb2-ab70-51cc348bb7a6/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cf8e26-691a-4bb2-ab70-51cc348bb7a6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cf8e26-691a-4bb2-ab70-51cc348bb7a6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 02:21:43,701 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr70REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 729 more)] === [2021-11-07 02:21:43,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:21:43,701 INFO L85 PathProgramCache]: Analyzing trace with hash 1093747294, now seen corresponding path program 2 times [2021-11-07 02:21:43,702 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:21:43,702 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [434285715] [2021-11-07 02:21:43,702 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 02:21:43,702 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:21:43,702 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cf8e26-691a-4bb2-ab70-51cc348bb7a6/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:21:43,703 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cf8e26-691a-4bb2-ab70-51cc348bb7a6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:21:43,704 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cf8e26-691a-4bb2-ab70-51cc348bb7a6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-07 02:21:44,414 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 02:21:44,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:21:44,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-07 02:21:44,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:21:44,767 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:21:44,768 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:21:45,637 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:21:45,638 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:21:45,638 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [434285715] [2021-11-07 02:21:45,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [434285715] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:21:45,638 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [82928802] [2021-11-07 02:21:45,638 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 02:21:45,638 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:21:45,638 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cf8e26-691a-4bb2-ab70-51cc348bb7a6/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:21:45,639 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cf8e26-691a-4bb2-ab70-51cc348bb7a6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:21:45,641 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cf8e26-691a-4bb2-ab70-51cc348bb7a6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2021-11-07 02:21:47,573 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 02:21:47,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:21:47,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-07 02:21:47,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:21:47,813 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:21:47,814 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:21:48,147 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:21:48,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [82928802] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:21:48,148 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291775143] [2021-11-07 02:21:48,148 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 02:21:48,148 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:21:48,148 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cf8e26-691a-4bb2-ab70-51cc348bb7a6/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:21:48,149 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cf8e26-691a-4bb2-ab70-51cc348bb7a6/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 02:21:48,149 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cf8e26-691a-4bb2-ab70-51cc348bb7a6/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-07 02:22:03,112 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 02:22:03,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:22:03,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-07 02:22:03,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:22:03,447 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-07 02:22:03,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 17 [2021-11-07 02:22:03,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-11-07 02:22:04,010 INFO L354 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2021-11-07 02:22:04,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 26 [2021-11-07 02:22:04,211 INFO L354 Elim1Store]: treesize reduction 76, result has 20.0 percent of original size [2021-11-07 02:22:04,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 38 [2021-11-07 02:22:06,690 INFO L354 Elim1Store]: treesize reduction 76, result has 20.0 percent of original size [2021-11-07 02:22:06,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 38 [2021-11-07 02:22:08,724 INFO L354 Elim1Store]: treesize reduction 76, result has 20.0 percent of original size [2021-11-07 02:22:08,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 38 [2021-11-07 02:22:08,921 INFO L354 Elim1Store]: treesize reduction 76, result has 20.0 percent of original size [2021-11-07 02:22:08,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 38 [2021-11-07 02:22:09,121 INFO L354 Elim1Store]: treesize reduction 76, result has 20.0 percent of original size [2021-11-07 02:22:09,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 66 treesize of output 47 [2021-11-07 02:22:11,054 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-11-07 02:22:11,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 66 treesize of output 27 [2021-11-07 02:22:11,109 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 02:22:11,109 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:23:37,064 INFO L354 Elim1Store]: treesize reduction 5, result has 82.8 percent of original size [2021-11-07 02:23:37,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 44 [2021-11-07 02:24:02,058 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_#Ultimate.C_memset_#t~loopctr319_89| (_ BitVec 32)) (|ULTIMATE.start_#Ultimate.C_memset_#ptr.offset| (_ BitVec 32)) (|ULTIMATE.start_#Ultimate.C_memset_#t~loopctr319| (_ BitVec 32))) (= (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem35.base| (store (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem35.base|) (bvadd |ULTIMATE.start_#Ultimate.C_memset_#t~loopctr319| |ULTIMATE.start_#Ultimate.C_memset_#ptr.offset|) (_ bv0 32)) (bvadd |v_ULTIMATE.start_#Ultimate.C_memset_#t~loopctr319_89| |ULTIMATE.start_#Ultimate.C_memset_#ptr.offset|) (_ bv0 32))) c_ULTIMATE.start_main_~user~0.base) (bvadd (_ bv8 32) c_ULTIMATE.start_main_~user~0.offset)) |c_ULTIMATE.start_main_#t~mem35.base|)) is different from false [2021-11-07 02:24:04,092 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_#Ultimate.C_memset_#t~loopctr319_89| (_ BitVec 32)) (|ULTIMATE.start_#Ultimate.C_memset_#ptr.offset| (_ BitVec 32)) (|ULTIMATE.start_#Ultimate.C_memset_#t~loopctr319| (_ BitVec 32))) (let ((.cse1 (bvadd (_ bv8 32) c_ULTIMATE.start_main_~user~0.offset))) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~user~0.base) .cse1))) (= .cse0 (select (select (store |c_#memory_$Pointer$.base| .cse0 (store (store (select |c_#memory_$Pointer$.base| .cse0) (bvadd |ULTIMATE.start_#Ultimate.C_memset_#t~loopctr319| |ULTIMATE.start_#Ultimate.C_memset_#ptr.offset|) (_ bv0 32)) (bvadd |v_ULTIMATE.start_#Ultimate.C_memset_#t~loopctr319_89| |ULTIMATE.start_#Ultimate.C_memset_#ptr.offset|) (_ bv0 32))) c_ULTIMATE.start_main_~user~0.base) .cse1))))) is different from false [2021-11-07 02:24:04,975 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 6 refuted. 8 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 02:24:04,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [291775143] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:24:04,976 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 02:24:04,976 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 10, 11] total 36 [2021-11-07 02:24:04,976 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891319950] [2021-11-07 02:24:04,977 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-07 02:24:04,977 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:24:04,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-07 02:24:04,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=933, Unknown=37, NotChecked=130, Total=1260 [2021-11-07 02:24:04,979 INFO L87 Difference]: Start difference. First operand 2491 states and 3584 transitions. Second operand has 36 states, 36 states have (on average 5.722222222222222) internal successors, (206), 36 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:24:39,381 WARN L207 SmtUtils]: Spent 12.40 s on a formula simplification. DAG size of input: 83 DAG size of output: 78 [2021-11-07 02:27:03,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:27:03,018 INFO L93 Difference]: Finished difference Result 10113 states and 14186 transitions. [2021-11-07 02:27:03,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-11-07 02:27:03,019 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 5.722222222222222) internal successors, (206), 36 states have internal predecessors, (206), 0 states have call successors, (0), 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 02:27:03,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:27:03,046 INFO L225 Difference]: With dead ends: 10113 [2021-11-07 02:27:03,047 INFO L226 Difference]: Without dead ends: 10113 [2021-11-07 02:27:03,053 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 492 GetRequests, 376 SyntacticMatches, 8 SemanticMatches, 108 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 3634 ImplicationChecksByTransitivity, 169.5s TimeCoverageRelationStatistics Valid=2253, Invalid=9264, Unknown=47, NotChecked=426, Total=11990 [2021-11-07 02:27:03,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10113 states. [2021-11-07 02:27:03,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10113 to 2586. [2021-11-07 02:27:03,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2586 states, 2051 states have (on average 1.810823988298391) internal successors, (3714), 2585 states have internal predecessors, (3714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:27:03,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2586 states to 2586 states and 3714 transitions. [2021-11-07 02:27:03,165 INFO L78 Accepts]: Start accepts. Automaton has 2586 states and 3714 transitions. Word has length 70 [2021-11-07 02:27:03,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:27:03,165 INFO L470 AbstractCegarLoop]: Abstraction has 2586 states and 3714 transitions. [2021-11-07 02:27:03,166 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 5.722222222222222) internal successors, (206), 36 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:27:03,166 INFO L276 IsEmpty]: Start isEmpty. Operand 2586 states and 3714 transitions. [2021-11-07 02:27:03,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-07 02:27:03,166 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:27:03,167 INFO L513 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:27:03,181 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cf8e26-691a-4bb2-ab70-51cc348bb7a6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (20)] Forceful destruction successful, exit code 0 [2021-11-07 02:27:03,422 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cf8e26-691a-4bb2-ab70-51cc348bb7a6/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-07 02:27:03,595 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cf8e26-691a-4bb2-ab70-51cc348bb7a6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Ended with exit code 0 [2021-11-07 02:27:03,781 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cf8e26-691a-4bb2-ab70-51cc348bb7a6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cf8e26-691a-4bb2-ab70-51cc348bb7a6/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cf8e26-691a-4bb2-ab70-51cc348bb7a6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:27:03,782 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr71REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 729 more)] === [2021-11-07 02:27:03,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:27:03,782 INFO L85 PathProgramCache]: Analyzing trace with hash -1408996129, now seen corresponding path program 1 times [2021-11-07 02:27:03,783 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:27:03,783 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1447873256] [2021-11-07 02:27:03,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:27:03,783 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:27:03,783 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cf8e26-691a-4bb2-ab70-51cc348bb7a6/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:27:03,784 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cf8e26-691a-4bb2-ab70-51cc348bb7a6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:27:03,792 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cf8e26-691a-4bb2-ab70-51cc348bb7a6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-07 02:27:04,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:27:04,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-07 02:27:04,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:27:05,321 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:27:05,321 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:27:06,780 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:27:06,781 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:27:06,781 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1447873256] [2021-11-07 02:27:06,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1447873256] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:27:06,781 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1667385421] [2021-11-07 02:27:06,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:27:06,782 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:27:06,782 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cf8e26-691a-4bb2-ab70-51cc348bb7a6/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:27:06,783 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cf8e26-691a-4bb2-ab70-51cc348bb7a6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:27:06,784 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cf8e26-691a-4bb2-ab70-51cc348bb7a6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2021-11-07 02:27:08,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:27:08,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-07 02:27:08,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:27:08,303 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:27:08,303 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:27:08,520 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:27:08,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1667385421] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:27:08,520 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530633308] [2021-11-07 02:27:08,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:27:08,520 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:27:08,520 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cf8e26-691a-4bb2-ab70-51cc348bb7a6/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:27:08,521 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cf8e26-691a-4bb2-ab70-51cc348bb7a6/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 02:27:08,537 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cf8e26-691a-4bb2-ab70-51cc348bb7a6/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-07 02:27:09,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:27:09,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-07 02:27:09,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:27:09,763 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:27:09,763 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:27:13,986 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:27:13,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [530633308] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:27:13,986 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 02:27:13,986 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18, 18, 18, 18] total 49 [2021-11-07 02:27:13,987 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990154405] [2021-11-07 02:27:13,987 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-11-07 02:27:13,988 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:27:13,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-11-07 02:27:13,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=592, Invalid=1760, Unknown=0, NotChecked=0, Total=2352 [2021-11-07 02:27:13,990 INFO L87 Difference]: Start difference. First operand 2586 states and 3714 transitions. Second operand has 49 states, 49 states have (on average 2.306122448979592) internal successors, (113), 49 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:28:10,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:28:10,893 INFO L93 Difference]: Finished difference Result 24408 states and 34576 transitions. [2021-11-07 02:28:10,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-11-07 02:28:10,894 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.306122448979592) internal successors, (113), 49 states have internal predecessors, (113), 0 states have call successors, (0), 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 78 [2021-11-07 02:28:10,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:28:10,952 INFO L225 Difference]: With dead ends: 24408 [2021-11-07 02:28:10,952 INFO L226 Difference]: Without dead ends: 24408 [2021-11-07 02:28:10,957 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 533 GetRequests, 428 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2885 ImplicationChecksByTransitivity, 19.9s TimeCoverageRelationStatistics Valid=3007, Invalid=8335, Unknown=0, NotChecked=0, Total=11342 [2021-11-07 02:28:10,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24408 states. [2021-11-07 02:28:11,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24408 to 2778. [2021-11-07 02:28:11,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2778 states, 2243 states have (on average 1.7521176995095853) internal successors, (3930), 2777 states have internal predecessors, (3930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:28:11,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2778 states to 2778 states and 3930 transitions. [2021-11-07 02:28:11,218 INFO L78 Accepts]: Start accepts. Automaton has 2778 states and 3930 transitions. Word has length 78 [2021-11-07 02:28:11,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:28:11,218 INFO L470 AbstractCegarLoop]: Abstraction has 2778 states and 3930 transitions. [2021-11-07 02:28:11,219 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.306122448979592) internal successors, (113), 49 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:28:11,219 INFO L276 IsEmpty]: Start isEmpty. Operand 2778 states and 3930 transitions. [2021-11-07 02:28:11,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-07 02:28:11,220 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:28:11,220 INFO L513 BasicCegarLoop]: trace histogram [30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:28:11,273 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cf8e26-691a-4bb2-ab70-51cc348bb7a6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-07 02:28:11,448 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cf8e26-691a-4bb2-ab70-51cc348bb7a6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (23)] Ended with exit code 0 [2021-11-07 02:28:11,646 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cf8e26-691a-4bb2-ab70-51cc348bb7a6/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2021-11-07 02:28:11,821 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cf8e26-691a-4bb2-ab70-51cc348bb7a6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cf8e26-691a-4bb2-ab70-51cc348bb7a6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cf8e26-691a-4bb2-ab70-51cc348bb7a6/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:28:11,821 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr71REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 729 more)] === [2021-11-07 02:28:11,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:28:11,821 INFO L85 PathProgramCache]: Analyzing trace with hash -2005712417, now seen corresponding path program 2 times [2021-11-07 02:28:11,822 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:28:11,822 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1392185592] [2021-11-07 02:28:11,823 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 02:28:11,823 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:28:11,823 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cf8e26-691a-4bb2-ab70-51cc348bb7a6/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:28:11,824 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cf8e26-691a-4bb2-ab70-51cc348bb7a6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:28:11,825 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cf8e26-691a-4bb2-ab70-51cc348bb7a6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-07 02:28:12,980 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 02:28:12,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:28:13,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 59 conjunts are in the unsatisfiable core [2021-11-07 02:28:13,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:28:15,021 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:28:15,021 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:28:22,342 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:28:22,342 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:28:22,342 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1392185592] [2021-11-07 02:28:22,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1392185592] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:28:22,342 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1963039770] [2021-11-07 02:28:22,342 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 02:28:22,342 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:28:22,343 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cf8e26-691a-4bb2-ab70-51cc348bb7a6/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:28:22,343 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cf8e26-691a-4bb2-ab70-51cc348bb7a6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:28:22,344 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cf8e26-691a-4bb2-ab70-51cc348bb7a6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2021-11-07 02:28:24,658 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 02:28:24,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:28:24,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 59 conjunts are in the unsatisfiable core [2021-11-07 02:28:24,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:28:25,296 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:28:25,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:28:27,522 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:28:27,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1963039770] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:28:27,522 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028716988] [2021-11-07 02:28:27,522 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 02:28:27,523 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:28:27,523 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cf8e26-691a-4bb2-ab70-51cc348bb7a6/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:28:27,535 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cf8e26-691a-4bb2-ab70-51cc348bb7a6/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 02:28:27,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cf8e26-691a-4bb2-ab70-51cc348bb7a6/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-07 02:28:57,600 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 02:28:57,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:28:57,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-07 02:28:57,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:28:58,045 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:28:58,045 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:29:07,350 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:29:07,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1028716988] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:29:07,350 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 02:29:07,350 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 34, 34, 34, 34] total 95 [2021-11-07 02:29:07,350 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347379952] [2021-11-07 02:29:07,351 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2021-11-07 02:29:07,351 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:29:07,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2021-11-07 02:29:07,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2105, Invalid=6825, Unknown=0, NotChecked=0, Total=8930 [2021-11-07 02:29:07,355 INFO L87 Difference]: Start difference. First operand 2778 states and 3930 transitions. Second operand has 95 states, 95 states have (on average 1.6631578947368422) internal successors, (158), 95 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:30:02,795 WARN L207 SmtUtils]: Spent 5.81 s on a formula simplification. DAG size of input: 140 DAG size of output: 116 [2021-11-07 02:30:09,173 WARN L207 SmtUtils]: Spent 5.05 s on a formula simplification. DAG size of input: 140 DAG size of output: 116 [2021-11-07 02:30:15,659 WARN L207 SmtUtils]: Spent 5.34 s on a formula simplification. DAG size of input: 140 DAG size of output: 116 [2021-11-07 02:30:40,693 WARN L207 SmtUtils]: Spent 5.44 s on a formula simplification. DAG size of input: 140 DAG size of output: 116 [2021-11-07 02:30:47,234 WARN L207 SmtUtils]: Spent 5.30 s on a formula simplification. DAG size of input: 140 DAG size of output: 116 [2021-11-07 02:31:17,676 WARN L207 SmtUtils]: Spent 5.05 s on a formula simplification. DAG size of input: 140 DAG size of output: 116 [2021-11-07 02:31:37,832 WARN L207 SmtUtils]: Spent 5.05 s on a formula simplification. DAG size of input: 146 DAG size of output: 121 [2021-11-07 02:31:44,641 WARN L207 SmtUtils]: Spent 5.17 s on a formula simplification. DAG size of input: 147 DAG size of output: 122 [2021-11-07 02:31:52,088 WARN L207 SmtUtils]: Spent 5.04 s on a formula simplification. DAG size of input: 145 DAG size of output: 120 [2021-11-07 02:31:59,053 WARN L207 SmtUtils]: Spent 5.37 s on a formula simplification. DAG size of input: 140 DAG size of output: 116 [2021-11-07 02:32:29,807 WARN L207 SmtUtils]: Spent 5.36 s on a formula simplification. DAG size of input: 140 DAG size of output: 116 [2021-11-07 02:32:36,524 WARN L207 SmtUtils]: Spent 5.47 s on a formula simplification. DAG size of input: 140 DAG size of output: 116