./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test5-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 9ad7fb26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24156e66-f1fa-4c41-9458-48e61f8f0248/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24156e66-f1fa-4c41-9458-48e61f8f0248/bin/utaipan-aC7eJsxGYH/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24156e66-f1fa-4c41-9458-48e61f8f0248/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24156e66-f1fa-4c41-9458-48e61f8f0248/bin/utaipan-aC7eJsxGYH/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test5-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24156e66-f1fa-4c41-9458-48e61f8f0248/bin/utaipan-aC7eJsxGYH/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24156e66-f1fa-4c41-9458-48e61f8f0248/bin/utaipan-aC7eJsxGYH --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 ad1bbae792ec9c8e2e546dc04f3672720af98ce14b9bd37d0d7647e79ce45565 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 03:57:39,021 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 03:57:39,024 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 03:57:39,062 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 03:57:39,063 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 03:57:39,064 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 03:57:39,067 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 03:57:39,070 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 03:57:39,073 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 03:57:39,074 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 03:57:39,076 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 03:57:39,078 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 03:57:39,079 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 03:57:39,081 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 03:57:39,097 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 03:57:39,099 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 03:57:39,104 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 03:57:39,106 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 03:57:39,108 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 03:57:39,116 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 03:57:39,121 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 03:57:39,123 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 03:57:39,128 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 03:57:39,129 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 03:57:39,139 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 03:57:39,145 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 03:57:39,145 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 03:57:39,147 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 03:57:39,147 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 03:57:39,159 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 03:57:39,160 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 03:57:39,162 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 03:57:39,164 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 03:57:39,166 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 03:57:39,168 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 03:57:39,168 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 03:57:39,169 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 03:57:39,169 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 03:57:39,170 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 03:57:39,171 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 03:57:39,172 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 03:57:39,173 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24156e66-f1fa-4c41-9458-48e61f8f0248/bin/utaipan-aC7eJsxGYH/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-11-03 03:57:39,228 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 03:57:39,228 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 03:57:39,230 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 03:57:39,230 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 03:57:39,231 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 03:57:39,231 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 03:57:39,231 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-03 03:57:39,231 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 03:57:39,232 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 03:57:39,232 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-03 03:57:39,233 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-03 03:57:39,233 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 03:57:39,234 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-03 03:57:39,234 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-03 03:57:39,234 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-03 03:57:39,235 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-03 03:57:39,236 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-03 03:57:39,236 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 03:57:39,236 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 03:57:39,237 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-03 03:57:39,237 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-03 03:57:39,237 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 03:57:39,237 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 03:57:39,237 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-03 03:57:39,238 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-03 03:57:39,238 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-03 03:57:39,238 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 03:57:39,238 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 03:57:39,239 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 03:57:39,239 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 03:57:39,239 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 03:57:39,240 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 03:57:39,240 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 03:57:39,240 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 03:57:39,240 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 03:57:39,241 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-03 03:57:39,241 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-03 03:57:39,241 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 03:57:39,241 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 03:57:39,242 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_24156e66-f1fa-4c41-9458-48e61f8f0248/bin/utaipan-aC7eJsxGYH/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24156e66-f1fa-4c41-9458-48e61f8f0248/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ad1bbae792ec9c8e2e546dc04f3672720af98ce14b9bd37d0d7647e79ce45565 [2021-11-03 03:57:39,558 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 03:57:39,587 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 03:57:39,590 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 03:57:39,592 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 03:57:39,593 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 03:57:39,594 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24156e66-f1fa-4c41-9458-48e61f8f0248/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test5-2.i [2021-11-03 03:57:39,674 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24156e66-f1fa-4c41-9458-48e61f8f0248/bin/utaipan-aC7eJsxGYH/data/471444a7b/249405122e8744d8a1aad6bbd34a6023/FLAG106497c0b [2021-11-03 03:57:40,482 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 03:57:40,483 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24156e66-f1fa-4c41-9458-48e61f8f0248/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test5-2.i [2021-11-03 03:57:40,506 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24156e66-f1fa-4c41-9458-48e61f8f0248/bin/utaipan-aC7eJsxGYH/data/471444a7b/249405122e8744d8a1aad6bbd34a6023/FLAG106497c0b [2021-11-03 03:57:40,667 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24156e66-f1fa-4c41-9458-48e61f8f0248/bin/utaipan-aC7eJsxGYH/data/471444a7b/249405122e8744d8a1aad6bbd34a6023 [2021-11-03 03:57:40,670 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 03:57:40,672 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 03:57:40,674 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 03:57:40,674 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 03:57:40,679 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 03:57:40,680 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:57:40" (1/1) ... [2021-11-03 03:57:40,681 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@722b4b12 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:57:40, skipping insertion in model container [2021-11-03 03:57:40,682 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:57:40" (1/1) ... [2021-11-03 03:57:40,691 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 03:57:40,794 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 03:57:41,429 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_24156e66-f1fa-4c41-9458-48e61f8f0248/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test5-2.i[33021,33034] [2021-11-03 03:57:41,673 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_24156e66-f1fa-4c41-9458-48e61f8f0248/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test5-2.i[49681,49694] [2021-11-03 03:57:41,723 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 03:57:41,745 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) [2021-11-03 03:57:41,746 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@4fe6fdd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:57:41, skipping insertion in model container [2021-11-03 03:57:41,746 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 03:57:41,747 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-03 03:57:41,750 INFO L168 Benchmark]: Toolchain (without parser) took 1076.52 ms. Allocated memory was 94.4 MB in the beginning and 113.2 MB in the end (delta: 18.9 MB). Free memory was 52.8 MB in the beginning and 80.9 MB in the end (delta: -28.1 MB). Peak memory consumption was 18.7 MB. Max. memory is 16.1 GB. [2021-11-03 03:57:41,751 INFO L168 Benchmark]: CDTParser took 0.32 ms. Allocated memory is still 94.4 MB. Free memory is still 71.5 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-03 03:57:41,754 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1073.07 ms. Allocated memory was 94.4 MB in the beginning and 113.2 MB in the end (delta: 18.9 MB). Free memory was 52.6 MB in the beginning and 80.9 MB in the end (delta: -28.4 MB). Peak memory consumption was 18.7 MB. Max. memory is 16.1 GB. [2021-11-03 03:57:41,756 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32 ms. Allocated memory is still 94.4 MB. Free memory is still 71.5 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 1073.07 ms. Allocated memory was 94.4 MB in the beginning and 113.2 MB in the end (delta: 18.9 MB). Free memory was 52.6 MB in the beginning and 80.9 MB in the end (delta: -28.4 MB). Peak memory consumption was 18.7 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_24156e66-f1fa-4c41-9458-48e61f8f0248/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24156e66-f1fa-4c41-9458-48e61f8f0248/bin/utaipan-aC7eJsxGYH/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24156e66-f1fa-4c41-9458-48e61f8f0248/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24156e66-f1fa-4c41-9458-48e61f8f0248/bin/utaipan-aC7eJsxGYH/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test5-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24156e66-f1fa-4c41-9458-48e61f8f0248/bin/utaipan-aC7eJsxGYH/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24156e66-f1fa-4c41-9458-48e61f8f0248/bin/utaipan-aC7eJsxGYH --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 ad1bbae792ec9c8e2e546dc04f3672720af98ce14b9bd37d0d7647e79ce45565 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 03:57:44,152 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 03:57:44,154 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 03:57:44,191 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 03:57:44,192 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 03:57:44,194 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 03:57:44,196 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 03:57:44,198 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 03:57:44,200 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 03:57:44,201 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 03:57:44,203 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 03:57:44,204 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 03:57:44,205 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 03:57:44,207 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 03:57:44,209 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 03:57:44,210 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 03:57:44,212 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 03:57:44,213 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 03:57:44,216 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 03:57:44,219 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 03:57:44,221 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 03:57:44,222 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 03:57:44,224 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 03:57:44,225 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 03:57:44,229 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 03:57:44,230 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 03:57:44,231 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 03:57:44,232 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 03:57:44,232 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 03:57:44,234 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 03:57:44,234 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 03:57:44,235 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 03:57:44,237 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 03:57:44,238 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 03:57:44,239 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 03:57:44,239 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 03:57:44,240 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 03:57:44,241 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 03:57:44,241 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 03:57:44,242 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 03:57:44,243 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 03:57:44,244 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24156e66-f1fa-4c41-9458-48e61f8f0248/bin/utaipan-aC7eJsxGYH/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2021-11-03 03:57:44,276 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 03:57:44,276 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 03:57:44,277 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 03:57:44,278 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 03:57:44,278 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 03:57:44,278 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 03:57:44,278 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 03:57:44,282 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 03:57:44,282 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 03:57:44,284 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-03 03:57:44,285 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-03 03:57:44,289 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 03:57:44,289 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 03:57:44,289 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-03 03:57:44,290 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-03 03:57:44,290 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 03:57:44,290 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 03:57:44,290 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-03 03:57:44,290 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-03 03:57:44,291 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-03 03:57:44,291 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 03:57:44,291 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 03:57:44,291 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-03 03:57:44,292 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-03 03:57:44,292 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 03:57:44,292 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 03:57:44,293 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 03:57:44,293 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-03 03:57:44,293 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 03:57:44,293 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 03:57:44,294 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 03:57:44,294 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 03:57:44,294 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-03 03:57:44,294 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-03 03:57:44,295 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 03:57:44,295 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 03:57:44,295 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_24156e66-f1fa-4c41-9458-48e61f8f0248/bin/utaipan-aC7eJsxGYH/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24156e66-f1fa-4c41-9458-48e61f8f0248/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ad1bbae792ec9c8e2e546dc04f3672720af98ce14b9bd37d0d7647e79ce45565 [2021-11-03 03:57:44,730 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 03:57:44,754 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 03:57:44,758 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 03:57:44,759 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 03:57:44,760 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 03:57:44,761 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24156e66-f1fa-4c41-9458-48e61f8f0248/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test5-2.i [2021-11-03 03:57:44,851 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24156e66-f1fa-4c41-9458-48e61f8f0248/bin/utaipan-aC7eJsxGYH/data/b74fd9155/69ab72b2cb5849ea909029486557b566/FLAG098fedfdf [2021-11-03 03:57:45,767 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 03:57:45,768 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24156e66-f1fa-4c41-9458-48e61f8f0248/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test5-2.i [2021-11-03 03:57:45,791 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24156e66-f1fa-4c41-9458-48e61f8f0248/bin/utaipan-aC7eJsxGYH/data/b74fd9155/69ab72b2cb5849ea909029486557b566/FLAG098fedfdf [2021-11-03 03:57:45,885 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24156e66-f1fa-4c41-9458-48e61f8f0248/bin/utaipan-aC7eJsxGYH/data/b74fd9155/69ab72b2cb5849ea909029486557b566 [2021-11-03 03:57:45,888 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 03:57:45,890 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 03:57:45,892 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 03:57:45,892 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 03:57:45,896 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 03:57:45,897 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:57:45" (1/1) ... [2021-11-03 03:57:45,899 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7419b70 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:57:45, skipping insertion in model container [2021-11-03 03:57:45,899 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:57:45" (1/1) ... [2021-11-03 03:57:45,908 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 03:57:45,984 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 03:57:46,598 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_24156e66-f1fa-4c41-9458-48e61f8f0248/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test5-2.i[33021,33034] [2021-11-03 03:57:46,846 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_24156e66-f1fa-4c41-9458-48e61f8f0248/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test5-2.i[49681,49694] [2021-11-03 03:57:46,867 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 03:57:46,882 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-03 03:57:46,927 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 03:57:46,965 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_24156e66-f1fa-4c41-9458-48e61f8f0248/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test5-2.i[33021,33034] [2021-11-03 03:57:47,051 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_24156e66-f1fa-4c41-9458-48e61f8f0248/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test5-2.i[49681,49694] [2021-11-03 03:57:47,061 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 03:57:47,077 INFO L203 MainTranslator]: Completed pre-run [2021-11-03 03:57:47,127 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_24156e66-f1fa-4c41-9458-48e61f8f0248/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test5-2.i[33021,33034] [2021-11-03 03:57:47,284 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_24156e66-f1fa-4c41-9458-48e61f8f0248/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test5-2.i[49681,49694] [2021-11-03 03:57:47,294 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 03:57:47,352 INFO L208 MainTranslator]: Completed translation [2021-11-03 03:57:47,353 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:57:47 WrapperNode [2021-11-03 03:57:47,353 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 03:57:47,354 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-03 03:57:47,355 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-03 03:57:47,355 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-03 03:57:47,364 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:57:47" (1/1) ... [2021-11-03 03:57:47,417 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:57:47" (1/1) ... [2021-11-03 03:57:47,547 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-03 03:57:47,548 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-03 03:57:47,548 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-03 03:57:47,549 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-03 03:57:47,560 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:57:47" (1/1) ... [2021-11-03 03:57:47,561 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:57:47" (1/1) ... [2021-11-03 03:57:47,588 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:57:47" (1/1) ... [2021-11-03 03:57:47,591 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:57:47" (1/1) ... [2021-11-03 03:57:47,718 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:57:47" (1/1) ... [2021-11-03 03:57:47,753 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:57:47" (1/1) ... [2021-11-03 03:57:47,767 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:57:47" (1/1) ... [2021-11-03 03:57:47,793 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-03 03:57:47,795 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-03 03:57:47,795 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-03 03:57:47,795 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-03 03:57:47,797 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:57:47" (1/1) ... [2021-11-03 03:57:47,804 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 03:57:47,817 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24156e66-f1fa-4c41-9458-48e61f8f0248/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 03:57:47,832 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24156e66-f1fa-4c41-9458-48e61f8f0248/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-03 03:57:47,852 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24156e66-f1fa-4c41-9458-48e61f8f0248/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-03 03:57:47,915 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-03 03:57:47,915 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-03 03:57:47,916 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-03 03:57:47,916 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-03 03:57:47,916 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-03 03:57:47,916 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-11-03 03:57:47,917 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-03 03:57:47,917 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-03 03:57:47,917 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-03 03:57:47,917 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-03 03:57:47,917 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-03 03:57:47,918 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-03 03:57:56,845 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-03 03:57:56,847 INFO L299 CfgBuilder]: Removed 120 assume(true) statements. [2021-11-03 03:57:56,851 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:57:56 BoogieIcfgContainer [2021-11-03 03:57:56,852 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-03 03:57:56,856 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-03 03:57:56,856 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-03 03:57:56,859 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-03 03:57:56,860 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 03:57:45" (1/3) ... [2021-11-03 03:57:56,861 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1fd97d0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:57:56, skipping insertion in model container [2021-11-03 03:57:56,861 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:57:47" (2/3) ... [2021-11-03 03:57:56,862 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1fd97d0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:57:56, skipping insertion in model container [2021-11-03 03:57:56,862 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:57:56" (3/3) ... [2021-11-03 03:57:56,866 INFO L111 eAbstractionObserver]: Analyzing ICFG uthash_OAT_test5-2.i [2021-11-03 03:57:56,873 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-03 03:57:56,874 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 838 error locations. [2021-11-03 03:57:56,943 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-03 03:57:56,961 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 [2021-11-03 03:57:56,962 INFO L340 AbstractCegarLoop]: Starting to check reachability of 838 error locations. [2021-11-03 03:57:57,072 INFO L276 IsEmpty]: Start isEmpty. Operand has 1672 states, 833 states have (on average 2.241296518607443) internal successors, (1867), 1671 states have internal predecessors, (1867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:57:57,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-03 03:57:57,080 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:57:57,080 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-03 03:57:57,081 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 834 more)] === [2021-11-03 03:57:57,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:57:57,088 INFO L85 PathProgramCache]: Analyzing trace with hash 28698764, now seen corresponding path program 1 times [2021-11-03 03:57:57,102 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:57:57,102 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [325025574] [2021-11-03 03:57:57,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:57:57,103 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:57:57,103 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24156e66-f1fa-4c41-9458-48e61f8f0248/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:57:57,106 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24156e66-f1fa-4c41-9458-48e61f8f0248/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:57:57,107 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24156e66-f1fa-4c41-9458-48e61f8f0248/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-03 03:57:57,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:57:57,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-03 03:57:57,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:57:57,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:57:57,430 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:57:57,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:57:57,461 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:57:57,461 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [325025574] [2021-11-03 03:57:57,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [325025574] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 03:57:57,463 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:57:57,463 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-03 03:57:57,465 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052026211] [2021-11-03 03:57:57,470 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-03 03:57:57,487 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:57:57,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-03 03:57:57,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-03 03:57:57,523 INFO L87 Difference]: Start difference. First operand has 1672 states, 833 states have (on average 2.241296518607443) internal successors, (1867), 1671 states have internal predecessors, (1867), 0 states have call successors, (0), 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) [2021-11-03 03:57:57,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:57:57,700 INFO L93 Difference]: Finished difference Result 1654 states and 1744 transitions. [2021-11-03 03:57:57,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-03 03:57:57,702 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 [2021-11-03 03:57:57,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:57:57,740 INFO L225 Difference]: With dead ends: 1654 [2021-11-03 03:57:57,740 INFO L226 Difference]: Without dead ends: 1652 [2021-11-03 03:57:57,742 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 [2021-11-03 03:57:57,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1652 states. [2021-11-03 03:57:57,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1652 to 1652. [2021-11-03 03:57:57,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1652 states, 824 states have (on average 2.1140776699029127) internal successors, (1742), 1651 states have internal predecessors, (1742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:57:57,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1652 states to 1652 states and 1742 transitions. [2021-11-03 03:57:57,883 INFO L78 Accepts]: Start accepts. Automaton has 1652 states and 1742 transitions. Word has length 5 [2021-11-03 03:57:57,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:57:57,883 INFO L470 AbstractCegarLoop]: Abstraction has 1652 states and 1742 transitions. [2021-11-03 03:57:57,884 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) [2021-11-03 03:57:57,884 INFO L276 IsEmpty]: Start isEmpty. Operand 1652 states and 1742 transitions. [2021-11-03 03:57:57,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-03 03:57:57,885 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:57:57,885 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-03 03:57:57,907 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24156e66-f1fa-4c41-9458-48e61f8f0248/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-11-03 03:57:58,102 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24156e66-f1fa-4c41-9458-48e61f8f0248/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 03:57:58,103 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 834 more)] === [2021-11-03 03:57:58,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:57:58,104 INFO L85 PathProgramCache]: Analyzing trace with hash 28698826, now seen corresponding path program 1 times [2021-11-03 03:57:58,105 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:57:58,105 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1853789056] [2021-11-03 03:57:58,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:57:58,106 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:57:58,106 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24156e66-f1fa-4c41-9458-48e61f8f0248/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:57:58,107 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24156e66-f1fa-4c41-9458-48e61f8f0248/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:57:58,115 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24156e66-f1fa-4c41-9458-48e61f8f0248/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-03 03:57:58,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:57:58,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 03:57:58,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:57:58,405 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 [2021-11-03 03:57:58,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:57:58,424 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:57:58,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:57:58,448 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:57:58,449 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1853789056] [2021-11-03 03:57:58,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1853789056] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 03:57:58,449 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:57:58,449 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-03 03:57:58,450 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325739438] [2021-11-03 03:57:58,451 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 03:57:58,452 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:57:58,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 03:57:58,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 03:57:58,454 INFO L87 Difference]: Start difference. First operand 1652 states and 1742 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) [2021-11-03 03:58:01,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:58:01,970 INFO L93 Difference]: Finished difference Result 1918 states and 2046 transitions. [2021-11-03 03:58:01,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 03:58:01,972 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 [2021-11-03 03:58:01,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:58:01,982 INFO L225 Difference]: With dead ends: 1918 [2021-11-03 03:58:01,990 INFO L226 Difference]: Without dead ends: 1918 [2021-11-03 03:58:01,991 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 [2021-11-03 03:58:01,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1918 states. [2021-11-03 03:58:02,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1918 to 1637. [2021-11-03 03:58:02,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1637 states, 900 states have (on average 1.9844444444444445) internal successors, (1786), 1636 states have internal predecessors, (1786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:58:02,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1637 states to 1637 states and 1786 transitions. [2021-11-03 03:58:02,077 INFO L78 Accepts]: Start accepts. Automaton has 1637 states and 1786 transitions. Word has length 5 [2021-11-03 03:58:02,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:58:02,078 INFO L470 AbstractCegarLoop]: Abstraction has 1637 states and 1786 transitions. [2021-11-03 03:58:02,078 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) [2021-11-03 03:58:02,079 INFO L276 IsEmpty]: Start isEmpty. Operand 1637 states and 1786 transitions. [2021-11-03 03:58:02,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-03 03:58:02,079 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:58:02,079 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-03 03:58:02,097 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24156e66-f1fa-4c41-9458-48e61f8f0248/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-03 03:58:02,290 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24156e66-f1fa-4c41-9458-48e61f8f0248/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 03:58:02,290 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 834 more)] === [2021-11-03 03:58:02,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:58:02,291 INFO L85 PathProgramCache]: Analyzing trace with hash 28698827, now seen corresponding path program 1 times [2021-11-03 03:58:02,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:58:02,292 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2080017091] [2021-11-03 03:58:02,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:58:02,293 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:58:02,293 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24156e66-f1fa-4c41-9458-48e61f8f0248/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:58:02,299 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24156e66-f1fa-4c41-9458-48e61f8f0248/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:58:02,300 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24156e66-f1fa-4c41-9458-48e61f8f0248/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-03 03:58:02,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:58:02,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 03:58:02,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:58:02,495 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 [2021-11-03 03:58:02,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:58:02,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:58:02,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:58:02,612 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:58:02,612 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2080017091] [2021-11-03 03:58:02,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2080017091] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 03:58:02,613 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:58:02,613 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-03 03:58:02,613 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17921870] [2021-11-03 03:58:02,613 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 03:58:02,614 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:58:02,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 03:58:02,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 03:58:02,615 INFO L87 Difference]: Start difference. First operand 1637 states and 1786 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) [2021-11-03 03:58:09,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:58:09,681 INFO L93 Difference]: Finished difference Result 2221 states and 2416 transitions. [2021-11-03 03:58:09,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 03:58:09,682 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 [2021-11-03 03:58:09,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:58:09,693 INFO L225 Difference]: With dead ends: 2221 [2021-11-03 03:58:09,694 INFO L226 Difference]: Without dead ends: 2221 [2021-11-03 03:58:09,694 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 [2021-11-03 03:58:09,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2221 states. [2021-11-03 03:58:09,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2221 to 1793. [2021-11-03 03:58:09,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1793 states, 1066 states have (on average 1.9624765478424016) internal successors, (2092), 1792 states have internal predecessors, (2092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:58:09,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1793 states to 1793 states and 2092 transitions. [2021-11-03 03:58:09,739 INFO L78 Accepts]: Start accepts. Automaton has 1793 states and 2092 transitions. Word has length 5 [2021-11-03 03:58:09,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:58:09,740 INFO L470 AbstractCegarLoop]: Abstraction has 1793 states and 2092 transitions. [2021-11-03 03:58:09,740 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) [2021-11-03 03:58:09,740 INFO L276 IsEmpty]: Start isEmpty. Operand 1793 states and 2092 transitions. [2021-11-03 03:58:09,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-03 03:58:09,741 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:58:09,741 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-03 03:58:09,763 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24156e66-f1fa-4c41-9458-48e61f8f0248/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-03 03:58:09,951 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24156e66-f1fa-4c41-9458-48e61f8f0248/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 03:58:09,952 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr640REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 834 more)] === [2021-11-03 03:58:09,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:58:09,952 INFO L85 PathProgramCache]: Analyzing trace with hash 891404513, now seen corresponding path program 1 times [2021-11-03 03:58:09,953 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:58:09,953 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [355790962] [2021-11-03 03:58:09,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:58:09,953 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:58:09,953 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24156e66-f1fa-4c41-9458-48e61f8f0248/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:58:09,954 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24156e66-f1fa-4c41-9458-48e61f8f0248/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:58:09,960 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24156e66-f1fa-4c41-9458-48e61f8f0248/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-03 03:58:10,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:58:10,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 03:58:10,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:58:10,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:58:10,128 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:58:10,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:58:10,152 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:58:10,153 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [355790962] [2021-11-03 03:58:10,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [355790962] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 03:58:10,153 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:58:10,153 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-03 03:58:10,153 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132018844] [2021-11-03 03:58:10,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 03:58:10,154 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:58:10,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 03:58:10,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 03:58:10,155 INFO L87 Difference]: Start difference. First operand 1793 states and 2092 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) [2021-11-03 03:58:10,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:58:10,335 INFO L93 Difference]: Finished difference Result 3383 states and 3969 transitions. [2021-11-03 03:58:10,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 03:58:10,339 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 [2021-11-03 03:58:10,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:58:10,355 INFO L225 Difference]: With dead ends: 3383 [2021-11-03 03:58:10,356 INFO L226 Difference]: Without dead ends: 3383 [2021-11-03 03:58:10,357 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 [2021-11-03 03:58:10,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3383 states. [2021-11-03 03:58:10,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3383 to 2756. [2021-11-03 03:58:10,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2756 states, 2029 states have (on average 1.953178905864958) internal successors, (3963), 2755 states have internal predecessors, (3963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:58:10,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2756 states to 2756 states and 3963 transitions. [2021-11-03 03:58:10,429 INFO L78 Accepts]: Start accepts. Automaton has 2756 states and 3963 transitions. Word has length 6 [2021-11-03 03:58:10,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:58:10,430 INFO L470 AbstractCegarLoop]: Abstraction has 2756 states and 3963 transitions. [2021-11-03 03:58:10,430 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) [2021-11-03 03:58:10,430 INFO L276 IsEmpty]: Start isEmpty. Operand 2756 states and 3963 transitions. [2021-11-03 03:58:10,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-03 03:58:10,431 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:58:10,431 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:58:10,448 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24156e66-f1fa-4c41-9458-48e61f8f0248/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-03 03:58:10,641 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24156e66-f1fa-4c41-9458-48e61f8f0248/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 03:58:10,642 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 834 more)] === [2021-11-03 03:58:10,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:58:10,643 INFO L85 PathProgramCache]: Analyzing trace with hash 2013913556, now seen corresponding path program 1 times [2021-11-03 03:58:10,643 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:58:10,643 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [385351722] [2021-11-03 03:58:10,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:58:10,644 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:58:10,644 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24156e66-f1fa-4c41-9458-48e61f8f0248/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:58:10,648 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24156e66-f1fa-4c41-9458-48e61f8f0248/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:58:10,689 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24156e66-f1fa-4c41-9458-48e61f8f0248/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-03 03:58:10,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:58:10,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 03:58:10,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:58:10,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:58:10,895 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:58:10,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:58:10,924 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:58:10,924 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [385351722] [2021-11-03 03:58:10,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [385351722] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 03:58:10,925 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:58:10,925 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-03 03:58:10,925 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045925084] [2021-11-03 03:58:10,925 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 03:58:10,926 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:58:10,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 03:58:10,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 03:58:10,927 INFO L87 Difference]: Start difference. First operand 2756 states and 3963 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) [2021-11-03 03:58:10,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:58:10,974 INFO L93 Difference]: Finished difference Result 2696 states and 3877 transitions. [2021-11-03 03:58:10,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 03:58:10,975 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 [2021-11-03 03:58:10,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:58:10,990 INFO L225 Difference]: With dead ends: 2696 [2021-11-03 03:58:10,990 INFO L226 Difference]: Without dead ends: 2696 [2021-11-03 03:58:10,991 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 [2021-11-03 03:58:10,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2696 states. [2021-11-03 03:58:11,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2696 to 2696. [2021-11-03 03:58:11,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2696 states, 1993 states have (on average 1.9453085800301053) internal successors, (3877), 2695 states have internal predecessors, (3877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:58:11,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2696 states to 2696 states and 3877 transitions. [2021-11-03 03:58:11,061 INFO L78 Accepts]: Start accepts. Automaton has 2696 states and 3877 transitions. Word has length 11 [2021-11-03 03:58:11,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:58:11,063 INFO L470 AbstractCegarLoop]: Abstraction has 2696 states and 3877 transitions. [2021-11-03 03:58:11,066 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) [2021-11-03 03:58:11,067 INFO L276 IsEmpty]: Start isEmpty. Operand 2696 states and 3877 transitions. [2021-11-03 03:58:11,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-03 03:58:11,067 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:58:11,067 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:58:11,084 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24156e66-f1fa-4c41-9458-48e61f8f0248/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-03 03:58:11,281 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24156e66-f1fa-4c41-9458-48e61f8f0248/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 03:58:11,282 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 834 more)] === [2021-11-03 03:58:11,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:58:11,282 INFO L85 PathProgramCache]: Analyzing trace with hash -1659327634, now seen corresponding path program 1 times [2021-11-03 03:58:11,282 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:58:11,283 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1586239185] [2021-11-03 03:58:11,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:58:11,283 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:58:11,283 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24156e66-f1fa-4c41-9458-48e61f8f0248/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:58:11,285 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24156e66-f1fa-4c41-9458-48e61f8f0248/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:58:11,327 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24156e66-f1fa-4c41-9458-48e61f8f0248/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-03 03:58:11,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:58:11,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 03:58:11,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:58:11,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:58:11,540 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:58:11,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:58:11,583 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:58:11,583 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1586239185] [2021-11-03 03:58:11,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1586239185] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 03:58:11,584 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:58:11,584 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-03 03:58:11,584 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046158648] [2021-11-03 03:58:11,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 03:58:11,585 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:58:11,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 03:58:11,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-03 03:58:11,587 INFO L87 Difference]: Start difference. First operand 2696 states and 3877 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) [2021-11-03 03:58:11,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:58:11,707 INFO L93 Difference]: Finished difference Result 2668 states and 3821 transitions. [2021-11-03 03:58:11,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 03:58:11,708 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 [2021-11-03 03:58:11,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:58:11,723 INFO L225 Difference]: With dead ends: 2668 [2021-11-03 03:58:11,724 INFO L226 Difference]: Without dead ends: 2668 [2021-11-03 03:58:11,728 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 [2021-11-03 03:58:11,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2668 states. [2021-11-03 03:58:11,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2668 to 2666. [2021-11-03 03:58:11,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2666 states, 1977 states have (on average 1.9317147192716237) internal successors, (3819), 2665 states have internal predecessors, (3819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:58:11,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2666 states to 2666 states and 3819 transitions. [2021-11-03 03:58:11,788 INFO L78 Accepts]: Start accepts. Automaton has 2666 states and 3819 transitions. Word has length 13 [2021-11-03 03:58:11,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:58:11,789 INFO L470 AbstractCegarLoop]: Abstraction has 2666 states and 3819 transitions. [2021-11-03 03:58:11,789 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) [2021-11-03 03:58:11,789 INFO L276 IsEmpty]: Start isEmpty. Operand 2666 states and 3819 transitions. [2021-11-03 03:58:11,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-03 03:58:11,790 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:58:11,790 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] [2021-11-03 03:58:11,806 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24156e66-f1fa-4c41-9458-48e61f8f0248/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-03 03:58:12,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24156e66-f1fa-4c41-9458-48e61f8f0248/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 03:58:12,007 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr42REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 834 more)] === [2021-11-03 03:58:12,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:58:12,008 INFO L85 PathProgramCache]: Analyzing trace with hash 913198236, now seen corresponding path program 1 times [2021-11-03 03:58:12,008 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:58:12,008 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1621832070] [2021-11-03 03:58:12,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:58:12,008 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:58:12,009 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24156e66-f1fa-4c41-9458-48e61f8f0248/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:58:12,009 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24156e66-f1fa-4c41-9458-48e61f8f0248/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:58:12,010 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24156e66-f1fa-4c41-9458-48e61f8f0248/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-03 03:58:12,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:58:12,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 03:58:12,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:58:12,225 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 [2021-11-03 03:58:12,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:58:12,339 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:58:12,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:58:12,455 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:58:12,455 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1621832070] [2021-11-03 03:58:12,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1621832070] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 03:58:12,455 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:58:12,455 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-03 03:58:12,456 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858664225] [2021-11-03 03:58:12,456 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 03:58:12,456 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:58:12,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 03:58:12,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 03:58:12,457 INFO L87 Difference]: Start difference. First operand 2666 states and 3819 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) [2021-11-03 03:58:16,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:58:16,637 INFO L93 Difference]: Finished difference Result 4193 states and 5802 transitions. [2021-11-03 03:58:16,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 03:58:16,638 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 [2021-11-03 03:58:16,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:58:16,660 INFO L225 Difference]: With dead ends: 4193 [2021-11-03 03:58:16,660 INFO L226 Difference]: Without dead ends: 4193 [2021-11-03 03:58:16,660 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 [2021-11-03 03:58:16,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4193 states. [2021-11-03 03:58:16,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4193 to 2662. [2021-11-03 03:58:16,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2662 states, 1977 states have (on average 1.9276681841173495) internal successors, (3811), 2661 states have internal predecessors, (3811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:58:16,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2662 states to 2662 states and 3811 transitions. [2021-11-03 03:58:16,759 INFO L78 Accepts]: Start accepts. Automaton has 2662 states and 3811 transitions. Word has length 27 [2021-11-03 03:58:16,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:58:16,759 INFO L470 AbstractCegarLoop]: Abstraction has 2662 states and 3811 transitions. [2021-11-03 03:58:16,759 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) [2021-11-03 03:58:16,760 INFO L276 IsEmpty]: Start isEmpty. Operand 2662 states and 3811 transitions. [2021-11-03 03:58:16,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-03 03:58:16,761 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:58:16,761 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] [2021-11-03 03:58:16,787 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24156e66-f1fa-4c41-9458-48e61f8f0248/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-03 03:58:16,973 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24156e66-f1fa-4c41-9458-48e61f8f0248/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 03:58:16,977 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr43REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 834 more)] === [2021-11-03 03:58:16,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:58:16,978 INFO L85 PathProgramCache]: Analyzing trace with hash 913198237, now seen corresponding path program 1 times [2021-11-03 03:58:16,978 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:58:16,978 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1616073619] [2021-11-03 03:58:16,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:58:16,979 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:58:16,979 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24156e66-f1fa-4c41-9458-48e61f8f0248/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:58:16,981 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24156e66-f1fa-4c41-9458-48e61f8f0248/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:58:16,983 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24156e66-f1fa-4c41-9458-48e61f8f0248/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-03 03:58:17,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:58:17,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 03:58:17,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:58:17,187 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 [2021-11-03 03:58:17,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:58:17,463 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:58:17,898 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:58:17,898 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:58:17,898 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1616073619] [2021-11-03 03:58:17,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1616073619] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 03:58:17,899 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:58:17,899 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-03 03:58:17,899 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671151890] [2021-11-03 03:58:17,899 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 03:58:17,900 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:58:17,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 03:58:17,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 03:58:17,900 INFO L87 Difference]: Start difference. First operand 2662 states and 3811 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) [2021-11-03 03:58:27,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:58:27,408 INFO L93 Difference]: Finished difference Result 3464 states and 4659 transitions. [2021-11-03 03:58:27,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 03:58:27,409 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 [2021-11-03 03:58:27,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:58:27,422 INFO L225 Difference]: With dead ends: 3464 [2021-11-03 03:58:27,422 INFO L226 Difference]: Without dead ends: 3464 [2021-11-03 03:58:27,423 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 [2021-11-03 03:58:27,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3464 states. [2021-11-03 03:58:27,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3464 to 2658. [2021-11-03 03:58:27,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2658 states, 1977 states have (on average 1.9236216489630753) internal successors, (3803), 2657 states have internal predecessors, (3803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:58:27,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2658 states to 2658 states and 3803 transitions. [2021-11-03 03:58:27,477 INFO L78 Accepts]: Start accepts. Automaton has 2658 states and 3803 transitions. Word has length 27 [2021-11-03 03:58:27,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:58:27,478 INFO L470 AbstractCegarLoop]: Abstraction has 2658 states and 3803 transitions. [2021-11-03 03:58:27,478 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) [2021-11-03 03:58:27,478 INFO L276 IsEmpty]: Start isEmpty. Operand 2658 states and 3803 transitions. [2021-11-03 03:58:27,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-03 03:58:27,479 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:58:27,480 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] [2021-11-03 03:58:27,496 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24156e66-f1fa-4c41-9458-48e61f8f0248/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-03 03:58:27,695 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24156e66-f1fa-4c41-9458-48e61f8f0248/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 03:58:27,695 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr107REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 834 more)] === [2021-11-03 03:58:27,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:58:27,696 INFO L85 PathProgramCache]: Analyzing trace with hash 944973104, now seen corresponding path program 1 times [2021-11-03 03:58:27,696 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:58:27,696 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1952203563] [2021-11-03 03:58:27,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:58:27,697 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:58:27,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24156e66-f1fa-4c41-9458-48e61f8f0248/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:58:27,698 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24156e66-f1fa-4c41-9458-48e61f8f0248/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:58:27,700 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24156e66-f1fa-4c41-9458-48e61f8f0248/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-03 03:58:27,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:58:27,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 03:58:27,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:58:28,098 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:58:28,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:58:28,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:58:28,231 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:58:28,231 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1952203563] [2021-11-03 03:58:28,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1952203563] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 03:58:28,232 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:58:28,232 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-03 03:58:28,232 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750603092] [2021-11-03 03:58:28,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 03:58:28,232 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:58:28,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 03:58:28,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 03:58:28,233 INFO L87 Difference]: Start difference. First operand 2658 states and 3803 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) [2021-11-03 03:58:28,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:58:28,301 INFO L93 Difference]: Finished difference Result 2646 states and 3783 transitions. [2021-11-03 03:58:28,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 03:58:28,302 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 [2021-11-03 03:58:28,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:58:28,323 INFO L225 Difference]: With dead ends: 2646 [2021-11-03 03:58:28,323 INFO L226 Difference]: Without dead ends: 2646 [2021-11-03 03:58:28,323 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 [2021-11-03 03:58:28,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2646 states. [2021-11-03 03:58:28,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2646 to 2646. [2021-11-03 03:58:28,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2646 states, 1965 states have (on average 1.9251908396946564) internal successors, (3783), 2645 states have internal predecessors, (3783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:58:28,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2646 states to 2646 states and 3783 transitions. [2021-11-03 03:58:28,394 INFO L78 Accepts]: Start accepts. Automaton has 2646 states and 3783 transitions. Word has length 42 [2021-11-03 03:58:28,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:58:28,396 INFO L470 AbstractCegarLoop]: Abstraction has 2646 states and 3783 transitions. [2021-11-03 03:58:28,396 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) [2021-11-03 03:58:28,396 INFO L276 IsEmpty]: Start isEmpty. Operand 2646 states and 3783 transitions. [2021-11-03 03:58:28,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-03 03:58:28,401 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:58:28,401 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] [2021-11-03 03:58:28,417 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24156e66-f1fa-4c41-9458-48e61f8f0248/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-03 03:58:28,613 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24156e66-f1fa-4c41-9458-48e61f8f0248/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 03:58:28,613 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr107REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 834 more)] === [2021-11-03 03:58:28,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:58:28,614 INFO L85 PathProgramCache]: Analyzing trace with hash 29098340, now seen corresponding path program 1 times [2021-11-03 03:58:28,614 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:58:28,614 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [179407202] [2021-11-03 03:58:28,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:58:28,615 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:58:28,615 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24156e66-f1fa-4c41-9458-48e61f8f0248/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:58:28,616 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24156e66-f1fa-4c41-9458-48e61f8f0248/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:58:28,621 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24156e66-f1fa-4c41-9458-48e61f8f0248/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-03 03:58:28,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:58:28,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 03:58:28,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:58:29,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:58:29,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:58:29,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:58:29,731 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:58:29,732 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [179407202] [2021-11-03 03:58:29,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [179407202] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 03:58:29,732 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:58:29,732 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-03 03:58:29,732 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880665668] [2021-11-03 03:58:29,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 03:58:29,747 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:58:29,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 03:58:29,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 03:58:29,748 INFO L87 Difference]: Start difference. First operand 2646 states and 3783 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) [2021-11-03 03:58:29,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:58:29,986 INFO L93 Difference]: Finished difference Result 2657 states and 3632 transitions. [2021-11-03 03:58:29,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 03:58:29,987 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 [2021-11-03 03:58:29,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:58:29,995 INFO L225 Difference]: With dead ends: 2657 [2021-11-03 03:58:29,996 INFO L226 Difference]: Without dead ends: 2657 [2021-11-03 03:58:29,996 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 [2021-11-03 03:58:30,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2657 states. [2021-11-03 03:58:30,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2657 to 2462. [2021-11-03 03:58:30,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2462 states, 1781 states have (on average 1.9247613700168444) internal successors, (3428), 2461 states have internal predecessors, (3428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:58:30,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2462 states to 2462 states and 3428 transitions. [2021-11-03 03:58:30,046 INFO L78 Accepts]: Start accepts. Automaton has 2462 states and 3428 transitions. Word has length 50 [2021-11-03 03:58:30,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:58:30,047 INFO L470 AbstractCegarLoop]: Abstraction has 2462 states and 3428 transitions. [2021-11-03 03:58:30,047 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) [2021-11-03 03:58:30,047 INFO L276 IsEmpty]: Start isEmpty. Operand 2462 states and 3428 transitions. [2021-11-03 03:58:30,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-03 03:58:30,051 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:58:30,051 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] [2021-11-03 03:58:30,067 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24156e66-f1fa-4c41-9458-48e61f8f0248/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-03 03:58:30,267 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24156e66-f1fa-4c41-9458-48e61f8f0248/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 03:58:30,267 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr61REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 834 more)] === [2021-11-03 03:58:30,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:58:30,267 INFO L85 PathProgramCache]: Analyzing trace with hash -839399161, now seen corresponding path program 1 times [2021-11-03 03:58:30,268 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:58:30,268 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1405193220] [2021-11-03 03:58:30,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:58:30,268 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:58:30,268 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24156e66-f1fa-4c41-9458-48e61f8f0248/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:58:30,269 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24156e66-f1fa-4c41-9458-48e61f8f0248/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:58:30,317 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24156e66-f1fa-4c41-9458-48e61f8f0248/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-03 03:58:30,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:58:30,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 03:58:30,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:58:30,738 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 [2021-11-03 03:58:30,744 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 [2021-11-03 03:58:31,466 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-03 03:58:31,466 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 28 treesize of output 30 [2021-11-03 03:58:31,477 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-03 03:58:31,477 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 27 treesize of output 23 [2021-11-03 03:58:31,523 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:58:31,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:58:38,417 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:58:38,418 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:58:38,418 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1405193220] [2021-11-03 03:58:38,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1405193220] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 03:58:38,418 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:58:38,418 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-03 03:58:38,419 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004228912] [2021-11-03 03:58:38,419 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 03:58:38,419 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:58:38,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 03:58:38,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=15, Unknown=2, NotChecked=0, Total=30 [2021-11-03 03:58:38,421 INFO L87 Difference]: Start difference. First operand 2462 states and 3428 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) [2021-11-03 03:59:02,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:59:02,113 INFO L93 Difference]: Finished difference Result 4196 states and 5717 transitions. [2021-11-03 03:59:02,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 03:59:02,114 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 [2021-11-03 03:59:02,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:59:02,121 INFO L225 Difference]: With dead ends: 4196 [2021-11-03 03:59:02,121 INFO L226 Difference]: Without dead ends: 4196 [2021-11-03 03:59:02,122 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=26, Invalid=27, Unknown=3, NotChecked=0, Total=56 [2021-11-03 03:59:02,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4196 states. [2021-11-03 03:59:02,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4196 to 2620. [2021-11-03 03:59:02,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2620 states, 1977 states have (on average 1.8786039453717753) internal successors, (3714), 2619 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) [2021-11-03 03:59:02,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2620 states to 2620 states and 3714 transitions. [2021-11-03 03:59:02,198 INFO L78 Accepts]: Start accepts. Automaton has 2620 states and 3714 transitions. Word has length 53 [2021-11-03 03:59:02,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:59:02,199 INFO L470 AbstractCegarLoop]: Abstraction has 2620 states and 3714 transitions. [2021-11-03 03:59:02,199 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) [2021-11-03 03:59:02,199 INFO L276 IsEmpty]: Start isEmpty. Operand 2620 states and 3714 transitions. [2021-11-03 03:59:02,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-03 03:59:02,200 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:59:02,200 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] [2021-11-03 03:59:02,218 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24156e66-f1fa-4c41-9458-48e61f8f0248/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-03 03:59:02,411 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24156e66-f1fa-4c41-9458-48e61f8f0248/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 03:59:02,411 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr66ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 834 more)] === [2021-11-03 03:59:02,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:59:02,412 INFO L85 PathProgramCache]: Analyzing trace with hash -416260760, now seen corresponding path program 1 times [2021-11-03 03:59:02,412 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:59:02,412 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [115471166] [2021-11-03 03:59:02,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:59:02,413 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:59:02,413 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24156e66-f1fa-4c41-9458-48e61f8f0248/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:59:02,414 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24156e66-f1fa-4c41-9458-48e61f8f0248/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:59:02,416 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24156e66-f1fa-4c41-9458-48e61f8f0248/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-03 03:59:02,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:59:02,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 03:59:02,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:59:02,916 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 [2021-11-03 03:59:02,934 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 [2021-11-03 03:59:02,979 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 [2021-11-03 03:59:03,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:59:03,018 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:59:03,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:59:03,176 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:59:03,176 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [115471166] [2021-11-03 03:59:03,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [115471166] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 03:59:03,176 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:59:03,176 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-03 03:59:03,176 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944887064] [2021-11-03 03:59:03,177 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 03:59:03,177 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:59:03,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 03:59:03,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-03 03:59:03,178 INFO L87 Difference]: Start difference. First operand 2620 states and 3714 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) [2021-11-03 03:59:11,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:59:11,247 INFO L93 Difference]: Finished difference Result 3735 states and 5105 transitions. [2021-11-03 03:59:11,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-03 03:59:11,247 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 [2021-11-03 03:59:11,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:59:11,252 INFO L225 Difference]: With dead ends: 3735 [2021-11-03 03:59:11,252 INFO L226 Difference]: Without dead ends: 3735 [2021-11-03 03:59:11,253 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 110 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-11-03 03:59:11,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3735 states. [2021-11-03 03:59:11,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3735 to 2619. [2021-11-03 03:59:11,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2619 states, 1977 states have (on average 1.877592311583207) internal successors, (3712), 2618 states have internal predecessors, (3712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:59:11,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2619 states to 2619 states and 3712 transitions. [2021-11-03 03:59:11,292 INFO L78 Accepts]: Start accepts. Automaton has 2619 states and 3712 transitions. Word has length 59 [2021-11-03 03:59:11,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:59:11,292 INFO L470 AbstractCegarLoop]: Abstraction has 2619 states and 3712 transitions. [2021-11-03 03:59:11,292 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) [2021-11-03 03:59:11,293 INFO L276 IsEmpty]: Start isEmpty. Operand 2619 states and 3712 transitions. [2021-11-03 03:59:11,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-03 03:59:11,293 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:59:11,293 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] [2021-11-03 03:59:11,310 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24156e66-f1fa-4c41-9458-48e61f8f0248/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-03 03:59:11,507 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24156e66-f1fa-4c41-9458-48e61f8f0248/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 03:59:11,507 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr67ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 834 more)] === [2021-11-03 03:59:11,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:59:11,508 INFO L85 PathProgramCache]: Analyzing trace with hash -19181353, now seen corresponding path program 1 times [2021-11-03 03:59:11,508 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:59:11,508 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2007137804] [2021-11-03 03:59:11,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:59:11,509 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:59:11,509 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24156e66-f1fa-4c41-9458-48e61f8f0248/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:59:11,510 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24156e66-f1fa-4c41-9458-48e61f8f0248/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:59:11,555 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24156e66-f1fa-4c41-9458-48e61f8f0248/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-03 03:59:12,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:59:12,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-03 03:59:12,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:59:12,164 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 [2021-11-03 03:59:12,200 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 [2021-11-03 03:59:12,219 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 [2021-11-03 03:59:12,296 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 [2021-11-03 03:59:12,300 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 [2021-11-03 03:59:12,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:59:12,367 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:59:12,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:59:12,833 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:59:12,833 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2007137804] [2021-11-03 03:59:12,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2007137804] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 03:59:12,833 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:59:12,834 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-11-03 03:59:12,834 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413059786] [2021-11-03 03:59:12,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-03 03:59:12,834 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:59:12,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-03 03:59:12,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-03 03:59:12,835 INFO L87 Difference]: Start difference. First operand 2619 states and 3712 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) [2021-11-03 03:59:43,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:59:43,067 INFO L93 Difference]: Finished difference Result 3498 states and 4765 transitions. [2021-11-03 03:59:43,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-03 03:59:43,068 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 [2021-11-03 03:59:43,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:59:43,073 INFO L225 Difference]: With dead ends: 3498 [2021-11-03 03:59:43,073 INFO L226 Difference]: Without dead ends: 3498 [2021-11-03 03:59:43,074 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 [2021-11-03 03:59:43,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3498 states. [2021-11-03 03:59:43,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3498 to 2618. [2021-11-03 03:59:43,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2618 states, 1977 states have (on average 1.8765806777946383) internal successors, (3710), 2617 states have internal predecessors, (3710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:59:43,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2618 states to 2618 states and 3710 transitions. [2021-11-03 03:59:43,113 INFO L78 Accepts]: Start accepts. Automaton has 2618 states and 3710 transitions. Word has length 60 [2021-11-03 03:59:43,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:59:43,114 INFO L470 AbstractCegarLoop]: Abstraction has 2618 states and 3710 transitions. [2021-11-03 03:59:43,114 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) [2021-11-03 03:59:43,114 INFO L276 IsEmpty]: Start isEmpty. Operand 2618 states and 3710 transitions. [2021-11-03 03:59:43,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-03 03:59:43,115 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:59:43,115 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] [2021-11-03 03:59:43,132 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24156e66-f1fa-4c41-9458-48e61f8f0248/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-03 03:59:43,339 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24156e66-f1fa-4c41-9458-48e61f8f0248/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 03:59:43,339 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr70REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 834 more)] === [2021-11-03 03:59:43,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:59:43,340 INFO L85 PathProgramCache]: Analyzing trace with hash -1927168386, now seen corresponding path program 1 times [2021-11-03 03:59:43,340 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:59:43,340 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [344932035] [2021-11-03 03:59:43,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:59:43,341 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:59:43,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24156e66-f1fa-4c41-9458-48e61f8f0248/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:59:43,343 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24156e66-f1fa-4c41-9458-48e61f8f0248/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:59:43,344 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24156e66-f1fa-4c41-9458-48e61f8f0248/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-03 03:59:43,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:59:43,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 03:59:43,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:59:43,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:59:43,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:59:44,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:59:44,127 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:59:44,127 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [344932035] [2021-11-03 03:59:44,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [344932035] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 03:59:44,128 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:59:44,128 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-03 03:59:44,128 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946267709] [2021-11-03 03:59:44,128 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 03:59:44,128 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:59:44,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 03:59:44,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-03 03:59:44,130 INFO L87 Difference]: Start difference. First operand 2618 states and 3710 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) [2021-11-03 03:59:44,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:59:44,396 INFO L93 Difference]: Finished difference Result 3752 states and 5115 transitions. [2021-11-03 03:59:44,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-03 03:59:44,397 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 [2021-11-03 03:59:44,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:59:44,404 INFO L225 Difference]: With dead ends: 3752 [2021-11-03 03:59:44,405 INFO L226 Difference]: Without dead ends: 3752 [2021-11-03 03:59:44,405 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-11-03 03:59:44,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3752 states. [2021-11-03 03:59:44,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3752 to 2636. [2021-11-03 03:59:44,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2636 states, 1995 states have (on average 1.868671679197995) internal successors, (3728), 2635 states have internal predecessors, (3728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:59:44,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2636 states to 2636 states and 3728 transitions. [2021-11-03 03:59:44,446 INFO L78 Accepts]: Start accepts. Automaton has 2636 states and 3728 transitions. Word has length 64 [2021-11-03 03:59:44,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:59:44,447 INFO L470 AbstractCegarLoop]: Abstraction has 2636 states and 3728 transitions. [2021-11-03 03:59:44,447 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) [2021-11-03 03:59:44,447 INFO L276 IsEmpty]: Start isEmpty. Operand 2636 states and 3728 transitions. [2021-11-03 03:59:44,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-03 03:59:44,448 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:59:44,448 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] [2021-11-03 03:59:44,465 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24156e66-f1fa-4c41-9458-48e61f8f0248/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-03 03:59:44,665 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24156e66-f1fa-4c41-9458-48e61f8f0248/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 03:59:44,666 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr70REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 834 more)] === [2021-11-03 03:59:44,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:59:44,666 INFO L85 PathProgramCache]: Analyzing trace with hash -938951394, now seen corresponding path program 1 times [2021-11-03 03:59:44,667 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:59:44,667 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2106509269] [2021-11-03 03:59:44,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:59:44,667 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:59:44,667 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24156e66-f1fa-4c41-9458-48e61f8f0248/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:59:44,668 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24156e66-f1fa-4c41-9458-48e61f8f0248/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:59:44,670 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24156e66-f1fa-4c41-9458-48e61f8f0248/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-03 03:59:45,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:59:45,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 03:59:45,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:59:45,374 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:59:45,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:59:45,609 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:59:45,609 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:59:45,609 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2106509269] [2021-11-03 03:59:45,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2106509269] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 03:59:45,609 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1935442594] [2021-11-03 03:59:45,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:59:45,610 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 03:59:45,610 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24156e66-f1fa-4c41-9458-48e61f8f0248/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 03:59:45,615 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24156e66-f1fa-4c41-9458-48e61f8f0248/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 03:59:45,635 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24156e66-f1fa-4c41-9458-48e61f8f0248/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-03 03:59:46,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:59:46,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 03:59:46,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:59:46,746 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:59:46,746 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:59:46,878 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:59:46,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1935442594] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 03:59:46,878 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985028578] [2021-11-03 03:59:46,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:59:46,879 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 03:59:46,879 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24156e66-f1fa-4c41-9458-48e61f8f0248/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 03:59:46,885 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24156e66-f1fa-4c41-9458-48e61f8f0248/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 03:59:46,885 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24156e66-f1fa-4c41-9458-48e61f8f0248/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-03 03:59:47,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:59:47,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 03:59:47,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:59:47,635 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:59:47,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:59:47,753 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:59:47,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [985028578] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 03:59:47,754 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-03 03:59:47,754 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 10 [2021-11-03 03:59:47,754 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963518562] [2021-11-03 03:59:47,755 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-03 03:59:47,755 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:59:47,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-03 03:59:47,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-11-03 03:59:47,756 INFO L87 Difference]: Start difference. First operand 2636 states and 3728 transitions. Second operand has 10 states, 10 states have (on average 7.2) internal successors, (72), 10 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:59:48,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:59:48,472 INFO L93 Difference]: Finished difference Result 3788 states and 5151 transitions. [2021-11-03 03:59:48,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-03 03:59:48,473 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.2) internal successors, (72), 10 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-11-03 03:59:48,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:59:48,481 INFO L225 Difference]: With dead ends: 3788 [2021-11-03 03:59:48,481 INFO L226 Difference]: Without dead ends: 3788 [2021-11-03 03:59:48,482 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 396 GetRequests, 382 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2021-11-03 03:59:48,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3788 states. [2021-11-03 03:59:48,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3788 to 2672. [2021-11-03 03:59:48,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2672 states, 2031 states have (on average 1.8532742491383556) internal successors, (3764), 2671 states have internal predecessors, (3764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:59:48,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2672 states to 2672 states and 3764 transitions. [2021-11-03 03:59:48,528 INFO L78 Accepts]: Start accepts. Automaton has 2672 states and 3764 transitions. Word has length 66 [2021-11-03 03:59:48,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:59:48,529 INFO L470 AbstractCegarLoop]: Abstraction has 2672 states and 3764 transitions. [2021-11-03 03:59:48,529 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.2) internal successors, (72), 10 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:59:48,529 INFO L276 IsEmpty]: Start isEmpty. Operand 2672 states and 3764 transitions. [2021-11-03 03:59:48,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-03 03:59:48,530 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:59:48,530 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] [2021-11-03 03:59:48,570 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24156e66-f1fa-4c41-9458-48e61f8f0248/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-03 03:59:48,754 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24156e66-f1fa-4c41-9458-48e61f8f0248/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (17)] Ended with exit code 0 [2021-11-03 03:59:48,961 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24156e66-f1fa-4c41-9458-48e61f8f0248/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2021-11-03 03:59:49,151 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24156e66-f1fa-4c41-9458-48e61f8f0248/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24156e66-f1fa-4c41-9458-48e61f8f0248/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24156e66-f1fa-4c41-9458-48e61f8f0248/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 03:59:49,151 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr70REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 834 more)] === [2021-11-03 03:59:49,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:59:49,152 INFO L85 PathProgramCache]: Analyzing trace with hash 1093747294, now seen corresponding path program 2 times [2021-11-03 03:59:49,152 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:59:49,152 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [13402227] [2021-11-03 03:59:49,152 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-03 03:59:49,152 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:59:49,152 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24156e66-f1fa-4c41-9458-48e61f8f0248/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:59:49,153 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24156e66-f1fa-4c41-9458-48e61f8f0248/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:59:49,169 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24156e66-f1fa-4c41-9458-48e61f8f0248/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-03 03:59:49,904 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-03 03:59:49,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 03:59:49,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-03 03:59:49,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:59:50,224 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:59:50,224 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:59:50,690 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:59:50,690 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:59:50,690 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [13402227] [2021-11-03 03:59:50,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [13402227] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 03:59:50,690 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1183345864] [2021-11-03 03:59:50,691 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-03 03:59:50,691 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 03:59:50,691 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24156e66-f1fa-4c41-9458-48e61f8f0248/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 03:59:50,691 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24156e66-f1fa-4c41-9458-48e61f8f0248/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 03:59:50,693 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24156e66-f1fa-4c41-9458-48e61f8f0248/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2021-11-03 03:59:52,616 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-03 03:59:52,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 03:59:52,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-03 03:59:52,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:59:52,836 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:59:52,836 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:59:52,999 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:59:52,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1183345864] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 03:59:53,000 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55051795] [2021-11-03 03:59:53,000 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-03 03:59:53,000 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 03:59:53,000 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24156e66-f1fa-4c41-9458-48e61f8f0248/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 03:59:53,007 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24156e66-f1fa-4c41-9458-48e61f8f0248/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 03:59:53,008 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24156e66-f1fa-4c41-9458-48e61f8f0248/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-03 04:00:01,466 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-03 04:00:01,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:00:01,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-03 04:00:01,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:00:01,670 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:00:01,670 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:00:01,822 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:00:01,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55051795] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:00:01,822 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-03 04:00:01,822 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 10, 10] total 18 [2021-11-03 04:00:01,823 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364971208] [2021-11-03 04:00:01,823 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-03 04:00:01,823 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:00:01,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-03 04:00:01,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2021-11-03 04:00:01,825 INFO L87 Difference]: Start difference. First operand 2672 states and 3764 transitions. Second operand has 18 states, 18 states have (on average 4.444444444444445) internal successors, (80), 18 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:00:05,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:00:05,479 INFO L93 Difference]: Finished difference Result 3860 states and 5223 transitions. [2021-11-03 04:00:05,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-03 04:00:05,480 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.444444444444445) internal successors, (80), 18 states have internal predecessors, (80), 0 states have call successors, (0), 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 [2021-11-03 04:00:05,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:00:05,487 INFO L225 Difference]: With dead ends: 3860 [2021-11-03 04:00:05,487 INFO L226 Difference]: Without dead ends: 3860 [2021-11-03 04:00:05,488 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 428 GetRequests, 398 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=370, Invalid=622, Unknown=0, NotChecked=0, Total=992 [2021-11-03 04:00:05,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3860 states. [2021-11-03 04:00:05,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3860 to 2744. [2021-11-03 04:00:05,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2744 states, 2103 states have (on average 1.8240608654303376) internal successors, (3836), 2743 states have internal predecessors, (3836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:00:05,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2744 states to 2744 states and 3836 transitions. [2021-11-03 04:00:05,543 INFO L78 Accepts]: Start accepts. Automaton has 2744 states and 3836 transitions. Word has length 70 [2021-11-03 04:00:05,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:00:05,543 INFO L470 AbstractCegarLoop]: Abstraction has 2744 states and 3836 transitions. [2021-11-03 04:00:05,544 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.444444444444445) internal successors, (80), 18 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:00:05,544 INFO L276 IsEmpty]: Start isEmpty. Operand 2744 states and 3836 transitions. [2021-11-03 04:00:05,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-03 04:00:05,545 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:00:05,545 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] [2021-11-03 04:00:05,551 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24156e66-f1fa-4c41-9458-48e61f8f0248/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (20)] Ended with exit code 0 [2021-11-03 04:00:05,806 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24156e66-f1fa-4c41-9458-48e61f8f0248/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-03 04:00:05,984 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24156e66-f1fa-4c41-9458-48e61f8f0248/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-03 04:00:06,159 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24156e66-f1fa-4c41-9458-48e61f8f0248/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24156e66-f1fa-4c41-9458-48e61f8f0248/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24156e66-f1fa-4c41-9458-48e61f8f0248/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:00:06,159 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr70REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 834 more)] === [2021-11-03 04:00:06,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:00:06,160 INFO L85 PathProgramCache]: Analyzing trace with hash -1408996130, now seen corresponding path program 3 times [2021-11-03 04:00:06,160 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:00:06,160 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [385313606] [2021-11-03 04:00:06,160 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-03 04:00:06,161 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:00:06,161 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24156e66-f1fa-4c41-9458-48e61f8f0248/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:00:06,161 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24156e66-f1fa-4c41-9458-48e61f8f0248/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:00:06,164 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24156e66-f1fa-4c41-9458-48e61f8f0248/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-03 04:00:07,575 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-03 04:00:07,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:00:07,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-03 04:00:07,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:00:08,278 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:00:08,278 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:00:09,678 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:00:09,679 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:00:09,679 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [385313606] [2021-11-03 04:00:09,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [385313606] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:00:09,679 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [212662425] [2021-11-03 04:00:09,680 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-03 04:00:09,680 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 04:00:09,680 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24156e66-f1fa-4c41-9458-48e61f8f0248/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 04:00:09,685 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24156e66-f1fa-4c41-9458-48e61f8f0248/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 04:00:09,686 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24156e66-f1fa-4c41-9458-48e61f8f0248/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2021-11-03 04:00:17,273 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-03 04:00:17,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:00:17,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-03 04:00:17,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:00:17,569 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:00:17,569 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:00:17,776 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:00:17,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [212662425] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:00:17,776 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928952412] [2021-11-03 04:00:17,776 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-03 04:00:17,776 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:00:17,776 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24156e66-f1fa-4c41-9458-48e61f8f0248/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:00:17,777 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24156e66-f1fa-4c41-9458-48e61f8f0248/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 04:00:17,778 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24156e66-f1fa-4c41-9458-48e61f8f0248/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process