./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test10-3.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_730a3348-7dc9-430c-9cd0-7e6fbbe7aa53/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730a3348-7dc9-430c-9cd0-7e6fbbe7aa53/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_730a3348-7dc9-430c-9cd0-7e6fbbe7aa53/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730a3348-7dc9-430c-9cd0-7e6fbbe7aa53/bin/utaipan-aC7eJsxGYH/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test10-3.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730a3348-7dc9-430c-9cd0-7e6fbbe7aa53/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_730a3348-7dc9-430c-9cd0-7e6fbbe7aa53/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 c098eb2ea0abe7b0f4b25f613d67df9ef36b2215e5396f258b75924d2167f9c8 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 05:47:16,090 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 05:47:16,092 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 05:47:16,134 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 05:47:16,135 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 05:47:16,140 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 05:47:16,142 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 05:47:16,146 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 05:47:16,149 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 05:47:16,154 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 05:47:16,155 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 05:47:16,157 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 05:47:16,158 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 05:47:16,160 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 05:47:16,162 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 05:47:16,164 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 05:47:16,166 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 05:47:16,167 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 05:47:16,171 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 05:47:16,179 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 05:47:16,181 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 05:47:16,185 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 05:47:16,188 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 05:47:16,189 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 05:47:16,198 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 05:47:16,199 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 05:47:16,199 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 05:47:16,201 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 05:47:16,201 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 05:47:16,203 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 05:47:16,203 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 05:47:16,204 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 05:47:16,206 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 05:47:16,207 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 05:47:16,208 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 05:47:16,209 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 05:47:16,209 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 05:47:16,210 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 05:47:16,210 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 05:47:16,211 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 05:47:16,212 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 05:47:16,213 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730a3348-7dc9-430c-9cd0-7e6fbbe7aa53/bin/utaipan-aC7eJsxGYH/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-11-03 05:47:16,253 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 05:47:16,253 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 05:47:16,255 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 05:47:16,255 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 05:47:16,255 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 05:47:16,261 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 05:47:16,262 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-03 05:47:16,262 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 05:47:16,262 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 05:47:16,262 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-03 05:47:16,263 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-03 05:47:16,263 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 05:47:16,264 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-03 05:47:16,264 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-03 05:47:16,264 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-03 05:47:16,265 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-03 05:47:16,265 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-03 05:47:16,265 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 05:47:16,266 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 05:47:16,266 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-03 05:47:16,266 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-03 05:47:16,266 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 05:47:16,267 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 05:47:16,267 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-03 05:47:16,267 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-03 05:47:16,267 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-03 05:47:16,269 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 05:47:16,269 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 05:47:16,269 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 05:47:16,269 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 05:47:16,270 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 05:47:16,270 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 05:47:16,270 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 05:47:16,271 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 05:47:16,271 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 05:47:16,271 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-03 05:47:16,271 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-03 05:47:16,271 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 05:47:16,272 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 05:47:16,272 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_730a3348-7dc9-430c-9cd0-7e6fbbe7aa53/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730a3348-7dc9-430c-9cd0-7e6fbbe7aa53/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c098eb2ea0abe7b0f4b25f613d67df9ef36b2215e5396f258b75924d2167f9c8 [2021-11-03 05:47:16,524 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 05:47:16,552 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 05:47:16,554 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 05:47:16,555 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 05:47:16,560 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 05:47:16,561 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730a3348-7dc9-430c-9cd0-7e6fbbe7aa53/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test10-3.i [2021-11-03 05:47:16,625 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730a3348-7dc9-430c-9cd0-7e6fbbe7aa53/bin/utaipan-aC7eJsxGYH/data/cb349c7c1/fa26772c77a04ce88ecc957ef9043d49/FLAG37af70e56 [2021-11-03 05:47:17,365 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 05:47:17,365 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730a3348-7dc9-430c-9cd0-7e6fbbe7aa53/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test10-3.i [2021-11-03 05:47:17,390 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730a3348-7dc9-430c-9cd0-7e6fbbe7aa53/bin/utaipan-aC7eJsxGYH/data/cb349c7c1/fa26772c77a04ce88ecc957ef9043d49/FLAG37af70e56 [2021-11-03 05:47:17,519 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730a3348-7dc9-430c-9cd0-7e6fbbe7aa53/bin/utaipan-aC7eJsxGYH/data/cb349c7c1/fa26772c77a04ce88ecc957ef9043d49 [2021-11-03 05:47:17,522 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 05:47:17,523 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 05:47:17,525 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 05:47:17,525 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 05:47:17,529 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 05:47:17,530 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 05:47:17" (1/1) ... [2021-11-03 05:47:17,531 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7bb35381 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:47:17, skipping insertion in model container [2021-11-03 05:47:17,531 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 05:47:17" (1/1) ... [2021-11-03 05:47:17,538 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 05:47:17,600 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 05:47:18,087 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_730a3348-7dc9-430c-9cd0-7e6fbbe7aa53/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test10-3.i[33022,33035] [2021-11-03 05:47:18,379 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 05:47:18,393 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 05:47:18,394 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@622476da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:47:18, skipping insertion in model container [2021-11-03 05:47:18,394 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 05:47:18,395 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-03 05:47:18,397 INFO L168 Benchmark]: Toolchain (without parser) took 872.24 ms. Allocated memory is still 111.1 MB. Free memory was 69.7 MB in the beginning and 66.9 MB in the end (delta: 2.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-11-03 05:47:18,399 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 111.1 MB. Free memory was 89.4 MB in the beginning and 89.4 MB in the end (delta: 41.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-03 05:47:18,400 INFO L168 Benchmark]: CACSL2BoogieTranslator took 869.51 ms. Allocated memory is still 111.1 MB. Free memory was 69.4 MB in the beginning and 66.9 MB in the end (delta: 2.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-11-03 05:47:18,402 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 111.1 MB. Free memory was 89.4 MB in the beginning and 89.4 MB in the end (delta: 41.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 869.51 ms. Allocated memory is still 111.1 MB. Free memory was 69.4 MB in the beginning and 66.9 MB in the end (delta: 2.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 734]: 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_730a3348-7dc9-430c-9cd0-7e6fbbe7aa53/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730a3348-7dc9-430c-9cd0-7e6fbbe7aa53/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_730a3348-7dc9-430c-9cd0-7e6fbbe7aa53/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730a3348-7dc9-430c-9cd0-7e6fbbe7aa53/bin/utaipan-aC7eJsxGYH/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test10-3.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730a3348-7dc9-430c-9cd0-7e6fbbe7aa53/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_730a3348-7dc9-430c-9cd0-7e6fbbe7aa53/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 c098eb2ea0abe7b0f4b25f613d67df9ef36b2215e5396f258b75924d2167f9c8 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 05:47:20,579 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 05:47:20,582 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 05:47:20,634 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 05:47:20,635 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 05:47:20,636 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 05:47:20,638 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 05:47:20,640 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 05:47:20,643 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 05:47:20,644 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 05:47:20,645 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 05:47:20,646 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 05:47:20,647 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 05:47:20,648 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 05:47:20,650 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 05:47:20,651 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 05:47:20,652 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 05:47:20,653 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 05:47:20,655 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 05:47:20,658 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 05:47:20,660 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 05:47:20,662 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 05:47:20,663 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 05:47:20,664 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 05:47:20,668 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 05:47:20,668 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 05:47:20,669 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 05:47:20,670 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 05:47:20,670 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 05:47:20,672 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 05:47:20,672 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 05:47:20,673 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 05:47:20,674 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 05:47:20,675 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 05:47:20,676 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 05:47:20,677 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 05:47:20,677 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 05:47:20,678 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 05:47:20,678 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 05:47:20,679 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 05:47:20,680 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 05:47:20,681 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730a3348-7dc9-430c-9cd0-7e6fbbe7aa53/bin/utaipan-aC7eJsxGYH/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2021-11-03 05:47:20,721 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 05:47:20,722 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 05:47:20,723 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 05:47:20,723 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 05:47:20,723 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 05:47:20,724 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 05:47:20,724 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 05:47:20,724 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 05:47:20,725 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 05:47:20,726 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-03 05:47:20,727 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-03 05:47:20,727 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 05:47:20,728 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 05:47:20,728 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-03 05:47:20,728 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-03 05:47:20,728 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 05:47:20,729 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 05:47:20,729 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-03 05:47:20,729 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-03 05:47:20,730 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-03 05:47:20,730 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 05:47:20,730 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 05:47:20,731 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-03 05:47:20,731 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-03 05:47:20,731 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 05:47:20,731 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 05:47:20,732 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 05:47:20,732 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-03 05:47:20,732 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 05:47:20,733 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 05:47:20,733 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 05:47:20,733 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 05:47:20,734 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-03 05:47:20,734 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-03 05:47:20,734 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 05:47:20,735 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 05:47:20,735 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_730a3348-7dc9-430c-9cd0-7e6fbbe7aa53/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730a3348-7dc9-430c-9cd0-7e6fbbe7aa53/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c098eb2ea0abe7b0f4b25f613d67df9ef36b2215e5396f258b75924d2167f9c8 [2021-11-03 05:47:21,192 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 05:47:21,224 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 05:47:21,227 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 05:47:21,228 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 05:47:21,229 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 05:47:21,230 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730a3348-7dc9-430c-9cd0-7e6fbbe7aa53/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test10-3.i [2021-11-03 05:47:21,300 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730a3348-7dc9-430c-9cd0-7e6fbbe7aa53/bin/utaipan-aC7eJsxGYH/data/9b7c0c1e2/1623009dfb8141efb10f3a185c51decc/FLAG633738c99 [2021-11-03 05:47:22,000 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 05:47:22,001 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730a3348-7dc9-430c-9cd0-7e6fbbe7aa53/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test10-3.i [2021-11-03 05:47:22,028 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730a3348-7dc9-430c-9cd0-7e6fbbe7aa53/bin/utaipan-aC7eJsxGYH/data/9b7c0c1e2/1623009dfb8141efb10f3a185c51decc/FLAG633738c99 [2021-11-03 05:47:22,147 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730a3348-7dc9-430c-9cd0-7e6fbbe7aa53/bin/utaipan-aC7eJsxGYH/data/9b7c0c1e2/1623009dfb8141efb10f3a185c51decc [2021-11-03 05:47:22,150 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 05:47:22,151 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 05:47:22,152 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 05:47:22,153 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 05:47:22,156 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 05:47:22,157 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 05:47:22" (1/1) ... [2021-11-03 05:47:22,158 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@50fc091a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:47:22, skipping insertion in model container [2021-11-03 05:47:22,158 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 05:47:22" (1/1) ... [2021-11-03 05:47:22,167 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 05:47:22,251 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 05:47:22,807 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_730a3348-7dc9-430c-9cd0-7e6fbbe7aa53/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test10-3.i[33022,33035] [2021-11-03 05:47:23,100 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 05:47:23,134 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-03 05:47:23,171 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 05:47:23,208 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_730a3348-7dc9-430c-9cd0-7e6fbbe7aa53/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test10-3.i[33022,33035] [2021-11-03 05:47:23,406 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 05:47:23,412 INFO L203 MainTranslator]: Completed pre-run [2021-11-03 05:47:23,440 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_730a3348-7dc9-430c-9cd0-7e6fbbe7aa53/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test10-3.i[33022,33035] [2021-11-03 05:47:23,563 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 05:47:23,649 INFO L208 MainTranslator]: Completed translation [2021-11-03 05:47:23,649 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:47:23 WrapperNode [2021-11-03 05:47:23,649 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 05:47:23,650 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-03 05:47:23,650 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-03 05:47:23,651 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-03 05:47:23,657 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:47:23" (1/1) ... [2021-11-03 05:47:23,707 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:47:23" (1/1) ... [2021-11-03 05:47:23,839 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-03 05:47:23,841 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-03 05:47:23,841 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-03 05:47:23,841 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-03 05:47:23,850 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:47:23" (1/1) ... [2021-11-03 05:47:23,850 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:47:23" (1/1) ... [2021-11-03 05:47:23,877 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:47:23" (1/1) ... [2021-11-03 05:47:23,878 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:47:23" (1/1) ... [2021-11-03 05:47:23,970 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:47:23" (1/1) ... [2021-11-03 05:47:24,036 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:47:23" (1/1) ... [2021-11-03 05:47:24,052 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:47:23" (1/1) ... [2021-11-03 05:47:24,072 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-03 05:47:24,073 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-03 05:47:24,073 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-03 05:47:24,074 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-03 05:47:24,074 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:47:23" (1/1) ... [2021-11-03 05:47:24,081 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 05:47:24,092 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730a3348-7dc9-430c-9cd0-7e6fbbe7aa53/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 05:47:24,106 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730a3348-7dc9-430c-9cd0-7e6fbbe7aa53/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-03 05:47:24,135 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730a3348-7dc9-430c-9cd0-7e6fbbe7aa53/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-03 05:47:24,154 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-03 05:47:24,154 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-03 05:47:24,154 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-03 05:47:24,154 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-03 05:47:24,154 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-03 05:47:24,154 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-11-03 05:47:24,155 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-03 05:47:24,155 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-03 05:47:24,155 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-03 05:47:24,155 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-03 05:47:24,155 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-03 05:47:24,155 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-03 05:47:34,399 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-03 05:47:34,399 INFO L299 CfgBuilder]: Removed 224 assume(true) statements. [2021-11-03 05:47:34,404 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 05:47:34 BoogieIcfgContainer [2021-11-03 05:47:34,404 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-03 05:47:34,406 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-03 05:47:34,406 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-03 05:47:34,409 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-03 05:47:34,410 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 05:47:22" (1/3) ... [2021-11-03 05:47:34,410 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@610a73d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 05:47:34, skipping insertion in model container [2021-11-03 05:47:34,411 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:47:23" (2/3) ... [2021-11-03 05:47:34,411 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@610a73d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 05:47:34, skipping insertion in model container [2021-11-03 05:47:34,411 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 05:47:34" (3/3) ... [2021-11-03 05:47:34,413 INFO L111 eAbstractionObserver]: Analyzing ICFG uthash_FNV_test10-3.i [2021-11-03 05:47:34,418 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-03 05:47:34,419 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1208 error locations. [2021-11-03 05:47:34,465 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-03 05:47:34,471 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 05:47:34,471 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1208 error locations. [2021-11-03 05:47:34,528 INFO L276 IsEmpty]: Start isEmpty. Operand has 2500 states, 1291 states have (on average 2.2130131680867544) internal successors, (2857), 2499 states have internal predecessors, (2857), 0 states have call successors, (0), 0 states 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 05:47:34,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-11-03 05:47:34,534 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:47:34,534 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-11-03 05:47:34,535 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1204 more)] === [2021-11-03 05:47:34,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:47:34,540 INFO L85 PathProgramCache]: Analyzing trace with hash 29857, now seen corresponding path program 1 times [2021-11-03 05:47:34,551 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:47:34,551 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1202335003] [2021-11-03 05:47:34,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:47:34,553 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:47:34,553 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730a3348-7dc9-430c-9cd0-7e6fbbe7aa53/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:47:34,560 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730a3348-7dc9-430c-9cd0-7e6fbbe7aa53/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:47:34,591 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730a3348-7dc9-430c-9cd0-7e6fbbe7aa53/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-03 05:47:34,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:47:34,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 05:47:34,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:47:34,982 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 05:47:34,997 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 05:47:34,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:47:35,020 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 05:47:35,021 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:47:35,021 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1202335003] [2021-11-03 05:47:35,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1202335003] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:47:35,022 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:47:35,022 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-03 05:47:35,024 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259460518] [2021-11-03 05:47:35,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 05:47:35,028 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:47:35,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 05:47:35,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 05:47:35,059 INFO L87 Difference]: Start difference. First operand has 2500 states, 1291 states have (on average 2.2130131680867544) internal successors, (2857), 2499 states have internal predecessors, (2857), 0 states have call successors, (0), 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 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states 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 05:47:40,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:47:40,144 INFO L93 Difference]: Finished difference Result 3353 states and 3561 transitions. [2021-11-03 05:47:40,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 05:47:40,145 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 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 3 [2021-11-03 05:47:40,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:47:40,189 INFO L225 Difference]: With dead ends: 3353 [2021-11-03 05:47:40,189 INFO L226 Difference]: Without dead ends: 3351 [2021-11-03 05:47:40,191 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 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 05:47:40,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3351 states. [2021-11-03 05:47:40,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3351 to 2648. [2021-11-03 05:47:40,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2648 states, 1463 states have (on average 2.0485304169514698) internal successors, (2997), 2647 states have internal predecessors, (2997), 0 states have call successors, (0), 0 states 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 05:47:40,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2648 states to 2648 states and 2997 transitions. [2021-11-03 05:47:40,343 INFO L78 Accepts]: Start accepts. Automaton has 2648 states and 2997 transitions. Word has length 3 [2021-11-03 05:47:40,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:47:40,343 INFO L470 AbstractCegarLoop]: Abstraction has 2648 states and 2997 transitions. [2021-11-03 05:47:40,343 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states 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 05:47:40,344 INFO L276 IsEmpty]: Start isEmpty. Operand 2648 states and 2997 transitions. [2021-11-03 05:47:40,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-11-03 05:47:40,344 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:47:40,344 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-11-03 05:47:40,360 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730a3348-7dc9-430c-9cd0-7e6fbbe7aa53/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-03 05:47:40,556 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730a3348-7dc9-430c-9cd0-7e6fbbe7aa53/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:47:40,556 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1204 more)] === [2021-11-03 05:47:40,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:47:40,558 INFO L85 PathProgramCache]: Analyzing trace with hash 29858, now seen corresponding path program 1 times [2021-11-03 05:47:40,558 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:47:40,558 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1415695243] [2021-11-03 05:47:40,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:47:40,559 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:47:40,559 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730a3348-7dc9-430c-9cd0-7e6fbbe7aa53/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:47:40,566 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730a3348-7dc9-430c-9cd0-7e6fbbe7aa53/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:47:40,567 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730a3348-7dc9-430c-9cd0-7e6fbbe7aa53/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-03 05:47:40,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:47:40,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 05:47:40,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:47:40,786 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 05:47:40,800 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 05:47:40,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:47:40,859 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 05:47:40,859 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:47:40,860 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1415695243] [2021-11-03 05:47:40,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1415695243] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:47:40,860 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:47:40,860 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-03 05:47:40,861 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967365607] [2021-11-03 05:47:40,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:47:40,862 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:47:40,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:47:40,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:47:40,863 INFO L87 Difference]: Start difference. First operand 2648 states and 2997 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 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 05:47:52,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:47:52,783 INFO L93 Difference]: Finished difference Result 4194 states and 4674 transitions. [2021-11-03 05:47:52,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:47:52,784 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 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 3 [2021-11-03 05:47:52,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:47:52,805 INFO L225 Difference]: With dead ends: 4194 [2021-11-03 05:47:52,805 INFO L226 Difference]: Without dead ends: 4194 [2021-11-03 05:47:52,806 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 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 05:47:52,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4194 states. [2021-11-03 05:47:52,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4194 to 2812. [2021-11-03 05:47:52,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2812 states, 1639 states have (on average 2.0372178157413057) internal successors, (3339), 2811 states have internal predecessors, (3339), 0 states have call successors, (0), 0 states 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 05:47:52,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2812 states to 2812 states and 3339 transitions. [2021-11-03 05:47:52,877 INFO L78 Accepts]: Start accepts. Automaton has 2812 states and 3339 transitions. Word has length 3 [2021-11-03 05:47:52,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:47:52,877 INFO L470 AbstractCegarLoop]: Abstraction has 2812 states and 3339 transitions. [2021-11-03 05:47:52,877 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 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 05:47:52,878 INFO L276 IsEmpty]: Start isEmpty. Operand 2812 states and 3339 transitions. [2021-11-03 05:47:52,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-03 05:47:52,878 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:47:52,878 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:47:52,893 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730a3348-7dc9-430c-9cd0-7e6fbbe7aa53/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-03 05:47:53,089 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730a3348-7dc9-430c-9cd0-7e6fbbe7aa53/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:47:53,089 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1204 more)] === [2021-11-03 05:47:53,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:47:53,090 INFO L85 PathProgramCache]: Analyzing trace with hash 62249618, now seen corresponding path program 1 times [2021-11-03 05:47:53,091 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:47:53,091 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1194038397] [2021-11-03 05:47:53,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:47:53,092 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:47:53,092 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730a3348-7dc9-430c-9cd0-7e6fbbe7aa53/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:47:53,092 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730a3348-7dc9-430c-9cd0-7e6fbbe7aa53/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:47:53,095 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730a3348-7dc9-430c-9cd0-7e6fbbe7aa53/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-03 05:47:53,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:47:53,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 05:47:53,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:47:53,331 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 05:47:53,355 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 05:47:53,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:47:53,380 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 05:47:53,380 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:47:53,381 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1194038397] [2021-11-03 05:47:53,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1194038397] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:47:53,381 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:47:53,382 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-03 05:47:53,387 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174331304] [2021-11-03 05:47:53,388 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 05:47:53,388 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:47:53,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 05:47:53,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 05:47:53,389 INFO L87 Difference]: Start difference. First operand 2812 states and 3339 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 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 05:47:56,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:47:56,869 INFO L93 Difference]: Finished difference Result 3618 states and 4157 transitions. [2021-11-03 05:47:56,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 05:47:56,872 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 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 8 [2021-11-03 05:47:56,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:47:56,890 INFO L225 Difference]: With dead ends: 3618 [2021-11-03 05:47:56,890 INFO L226 Difference]: Without dead ends: 3618 [2021-11-03 05:47:56,891 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 13 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 05:47:56,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3618 states. [2021-11-03 05:47:56,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3618 to 2721. [2021-11-03 05:47:56,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2721 states, 1639 states have (on average 1.9609517998779744) internal successors, (3214), 2720 states have internal predecessors, (3214), 0 states have call successors, (0), 0 states 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 05:47:56,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2721 states to 2721 states and 3214 transitions. [2021-11-03 05:47:56,963 INFO L78 Accepts]: Start accepts. Automaton has 2721 states and 3214 transitions. Word has length 8 [2021-11-03 05:47:56,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:47:56,963 INFO L470 AbstractCegarLoop]: Abstraction has 2721 states and 3214 transitions. [2021-11-03 05:47:56,964 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 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 05:47:56,964 INFO L276 IsEmpty]: Start isEmpty. Operand 2721 states and 3214 transitions. [2021-11-03 05:47:56,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-03 05:47:56,964 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:47:56,965 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:47:56,977 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730a3348-7dc9-430c-9cd0-7e6fbbe7aa53/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-03 05:47:57,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730a3348-7dc9-430c-9cd0-7e6fbbe7aa53/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:47:57,176 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1204 more)] === [2021-11-03 05:47:57,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:47:57,177 INFO L85 PathProgramCache]: Analyzing trace with hash 62249619, now seen corresponding path program 1 times [2021-11-03 05:47:57,178 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:47:57,178 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1888238947] [2021-11-03 05:47:57,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:47:57,178 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:47:57,178 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730a3348-7dc9-430c-9cd0-7e6fbbe7aa53/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:47:57,179 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730a3348-7dc9-430c-9cd0-7e6fbbe7aa53/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:47:57,219 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730a3348-7dc9-430c-9cd0-7e6fbbe7aa53/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-03 05:47:57,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:47:57,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 05:47:57,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:47:57,423 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 05:47:57,459 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 05:47:57,459 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:47:57,545 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 05:47:57,545 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:47:57,545 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1888238947] [2021-11-03 05:47:57,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1888238947] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:47:57,546 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:47:57,546 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-03 05:47:57,546 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390999540] [2021-11-03 05:47:57,547 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:47:57,547 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:47:57,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:47:57,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:47:57,548 INFO L87 Difference]: Start difference. First operand 2721 states and 3214 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states 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 05:48:06,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:48:06,929 INFO L93 Difference]: Finished difference Result 3747 states and 4188 transitions. [2021-11-03 05:48:06,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:48:06,930 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 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 8 [2021-11-03 05:48:06,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:48:06,946 INFO L225 Difference]: With dead ends: 3747 [2021-11-03 05:48:06,947 INFO L226 Difference]: Without dead ends: 3747 [2021-11-03 05:48:06,947 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 12 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 05:48:06,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3747 states. [2021-11-03 05:48:06,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3747 to 2713. [2021-11-03 05:48:06,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2713 states, 1641 states have (on average 1.9463741620962827) internal successors, (3194), 2712 states have internal predecessors, (3194), 0 states have call successors, (0), 0 states 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 05:48:07,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2713 states to 2713 states and 3194 transitions. [2021-11-03 05:48:07,004 INFO L78 Accepts]: Start accepts. Automaton has 2713 states and 3194 transitions. Word has length 8 [2021-11-03 05:48:07,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:48:07,004 INFO L470 AbstractCegarLoop]: Abstraction has 2713 states and 3194 transitions. [2021-11-03 05:48:07,005 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states 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 05:48:07,005 INFO L276 IsEmpty]: Start isEmpty. Operand 2713 states and 3194 transitions. [2021-11-03 05:48:07,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-03 05:48:07,005 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:48:07,006 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:48:07,036 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730a3348-7dc9-430c-9cd0-7e6fbbe7aa53/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-03 05:48:07,217 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730a3348-7dc9-430c-9cd0-7e6fbbe7aa53/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:48:07,217 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr658REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1204 more)] === [2021-11-03 05:48:07,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:48:07,218 INFO L85 PathProgramCache]: Analyzing trace with hash 175289392, now seen corresponding path program 1 times [2021-11-03 05:48:07,218 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:48:07,218 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1498051548] [2021-11-03 05:48:07,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:48:07,219 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:48:07,219 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730a3348-7dc9-430c-9cd0-7e6fbbe7aa53/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:48:07,220 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730a3348-7dc9-430c-9cd0-7e6fbbe7aa53/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:48:07,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730a3348-7dc9-430c-9cd0-7e6fbbe7aa53/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-03 05:48:07,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:48:07,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 05:48:07,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:48:07,460 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 05:48:07,464 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:48:07,491 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 05:48:07,492 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:48:07,492 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1498051548] [2021-11-03 05:48:07,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1498051548] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:48:07,493 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:48:07,493 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-03 05:48:07,493 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450437987] [2021-11-03 05:48:07,493 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:48:07,493 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:48:07,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:48:07,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:48:07,494 INFO L87 Difference]: Start difference. First operand 2713 states and 3194 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 05:48:07,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:48:07,543 INFO L93 Difference]: Finished difference Result 2671 states and 3151 transitions. [2021-11-03 05:48:07,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 05:48:07,544 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 05:48:07,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:48:07,557 INFO L225 Difference]: With dead ends: 2671 [2021-11-03 05:48:07,557 INFO L226 Difference]: Without dead ends: 2671 [2021-11-03 05:48:07,558 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 05:48:07,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2671 states. [2021-11-03 05:48:07,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2671 to 2671. [2021-11-03 05:48:07,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2671 states, 1623 states have (on average 1.9414664202094887) internal successors, (3151), 2670 states have internal predecessors, (3151), 0 states have call successors, (0), 0 states 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 05:48:07,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2671 states to 2671 states and 3151 transitions. [2021-11-03 05:48:07,610 INFO L78 Accepts]: Start accepts. Automaton has 2671 states and 3151 transitions. Word has length 11 [2021-11-03 05:48:07,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:48:07,610 INFO L470 AbstractCegarLoop]: Abstraction has 2671 states and 3151 transitions. [2021-11-03 05:48:07,610 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 05:48:07,611 INFO L276 IsEmpty]: Start isEmpty. Operand 2671 states and 3151 transitions. [2021-11-03 05:48:07,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-03 05:48:07,611 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:48:07,612 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:48:07,629 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730a3348-7dc9-430c-9cd0-7e6fbbe7aa53/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-03 05:48:07,827 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730a3348-7dc9-430c-9cd0-7e6fbbe7aa53/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:48:07,827 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr682REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1204 more)] === [2021-11-03 05:48:07,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:48:07,827 INFO L85 PathProgramCache]: Analyzing trace with hash 949435626, now seen corresponding path program 1 times [2021-11-03 05:48:07,828 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:48:07,828 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [908308981] [2021-11-03 05:48:07,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:48:07,828 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:48:07,828 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730a3348-7dc9-430c-9cd0-7e6fbbe7aa53/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:48:07,830 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730a3348-7dc9-430c-9cd0-7e6fbbe7aa53/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:48:07,844 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730a3348-7dc9-430c-9cd0-7e6fbbe7aa53/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-03 05:48:08,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:48:08,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 05:48:08,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:48:08,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:48:08,065 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:48:08,111 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 05:48:08,112 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:48:08,112 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [908308981] [2021-11-03 05:48:08,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [908308981] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:48:08,112 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:48:08,113 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-03 05:48:08,113 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876227063] [2021-11-03 05:48:08,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 05:48:08,113 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:48:08,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 05:48:08,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-03 05:48:08,114 INFO L87 Difference]: Start difference. First operand 2671 states and 3151 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 05:48:08,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:48:08,235 INFO L93 Difference]: Finished difference Result 2650 states and 3123 transitions. [2021-11-03 05:48:08,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:48:08,236 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 05:48:08,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:48:08,250 INFO L225 Difference]: With dead ends: 2650 [2021-11-03 05:48:08,250 INFO L226 Difference]: Without dead ends: 2650 [2021-11-03 05:48:08,254 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 05:48:08,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2650 states. [2021-11-03 05:48:08,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2650 to 2649. [2021-11-03 05:48:08,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2649 states, 1615 states have (on average 1.9331269349845202) internal successors, (3122), 2648 states have internal predecessors, (3122), 0 states have call successors, (0), 0 states 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 05:48:08,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2649 states to 2649 states and 3122 transitions. [2021-11-03 05:48:08,330 INFO L78 Accepts]: Start accepts. Automaton has 2649 states and 3122 transitions. Word has length 13 [2021-11-03 05:48:08,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:48:08,331 INFO L470 AbstractCegarLoop]: Abstraction has 2649 states and 3122 transitions. [2021-11-03 05:48:08,331 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 05:48:08,331 INFO L276 IsEmpty]: Start isEmpty. Operand 2649 states and 3122 transitions. [2021-11-03 05:48:08,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-03 05:48:08,333 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:48:08,333 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] [2021-11-03 05:48:08,344 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730a3348-7dc9-430c-9cd0-7e6fbbe7aa53/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-03 05:48:08,544 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730a3348-7dc9-430c-9cd0-7e6fbbe7aa53/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:48:08,544 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr334REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1204 more)] === [2021-11-03 05:48:08,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:48:08,545 INFO L85 PathProgramCache]: Analyzing trace with hash 270217471, now seen corresponding path program 1 times [2021-11-03 05:48:08,545 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:48:08,545 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1657372784] [2021-11-03 05:48:08,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:48:08,546 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:48:08,546 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730a3348-7dc9-430c-9cd0-7e6fbbe7aa53/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:48:08,546 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730a3348-7dc9-430c-9cd0-7e6fbbe7aa53/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:48:08,547 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730a3348-7dc9-430c-9cd0-7e6fbbe7aa53/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-03 05:48:08,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:48:08,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 05:48:08,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:48:08,792 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 05:48:08,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:48:08,837 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 05:48:08,838 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:48:08,838 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1657372784] [2021-11-03 05:48:08,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1657372784] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:48:08,838 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:48:08,838 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-03 05:48:08,839 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139217323] [2021-11-03 05:48:08,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:48:08,839 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:48:08,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:48:08,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:48:08,840 INFO L87 Difference]: Start difference. First operand 2649 states and 3122 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states 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 05:48:08,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:48:08,907 INFO L93 Difference]: Finished difference Result 4337 states and 4926 transitions. [2021-11-03 05:48:08,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 05:48:08,907 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 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 20 [2021-11-03 05:48:08,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:48:08,937 INFO L225 Difference]: With dead ends: 4337 [2021-11-03 05:48:08,937 INFO L226 Difference]: Without dead ends: 4337 [2021-11-03 05:48:08,938 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 36 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 05:48:08,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4337 states. [2021-11-03 05:48:08,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4337 to 2571. [2021-11-03 05:48:08,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2571 states, 1561 states have (on average 1.9173606662395901) internal successors, (2993), 2570 states have internal predecessors, (2993), 0 states have call successors, (0), 0 states 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 05:48:08,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2571 states to 2571 states and 2993 transitions. [2021-11-03 05:48:08,993 INFO L78 Accepts]: Start accepts. Automaton has 2571 states and 2993 transitions. Word has length 20 [2021-11-03 05:48:08,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:48:08,994 INFO L470 AbstractCegarLoop]: Abstraction has 2571 states and 2993 transitions. [2021-11-03 05:48:08,994 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states 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 05:48:08,994 INFO L276 IsEmpty]: Start isEmpty. Operand 2571 states and 2993 transitions. [2021-11-03 05:48:08,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-03 05:48:08,996 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:48:08,996 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] [2021-11-03 05:48:09,018 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730a3348-7dc9-430c-9cd0-7e6fbbe7aa53/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-03 05:48:09,215 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730a3348-7dc9-430c-9cd0-7e6fbbe7aa53/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:48:09,216 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1204 more)] === [2021-11-03 05:48:09,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:48:09,216 INFO L85 PathProgramCache]: Analyzing trace with hash -673839521, now seen corresponding path program 1 times [2021-11-03 05:48:09,216 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:48:09,216 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [973710650] [2021-11-03 05:48:09,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:48:09,217 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:48:09,217 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730a3348-7dc9-430c-9cd0-7e6fbbe7aa53/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:48:09,218 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730a3348-7dc9-430c-9cd0-7e6fbbe7aa53/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:48:09,224 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730a3348-7dc9-430c-9cd0-7e6fbbe7aa53/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-03 05:48:09,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:48:09,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 05:48:09,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:48:09,470 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 05:48:09,471 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:48:09,518 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 05:48:09,518 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:48:09,518 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [973710650] [2021-11-03 05:48:09,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [973710650] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:48:09,519 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:48:09,519 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-03 05:48:09,519 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746093168] [2021-11-03 05:48:09,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:48:09,519 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:48:09,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:48:09,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:48:09,520 INFO L87 Difference]: Start difference. First operand 2571 states and 2993 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states 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 05:48:09,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:48:09,583 INFO L93 Difference]: Finished difference Result 4260 states and 4849 transitions. [2021-11-03 05:48:09,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 05:48:09,583 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 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 20 [2021-11-03 05:48:09,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:48:09,598 INFO L225 Difference]: With dead ends: 4260 [2021-11-03 05:48:09,598 INFO L226 Difference]: Without dead ends: 4260 [2021-11-03 05:48:09,599 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 36 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 05:48:09,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4260 states. [2021-11-03 05:48:09,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4260 to 2529. [2021-11-03 05:48:09,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2529 states, 1543 states have (on average 1.911860012961763) internal successors, (2950), 2528 states have internal predecessors, (2950), 0 states have call successors, (0), 0 states 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 05:48:09,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2529 states to 2529 states and 2950 transitions. [2021-11-03 05:48:09,664 INFO L78 Accepts]: Start accepts. Automaton has 2529 states and 2950 transitions. Word has length 20 [2021-11-03 05:48:09,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:48:09,667 INFO L470 AbstractCegarLoop]: Abstraction has 2529 states and 2950 transitions. [2021-11-03 05:48:09,667 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states 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 05:48:09,667 INFO L276 IsEmpty]: Start isEmpty. Operand 2529 states and 2950 transitions. [2021-11-03 05:48:09,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-03 05:48:09,669 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:48:09,669 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] [2021-11-03 05:48:09,685 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730a3348-7dc9-430c-9cd0-7e6fbbe7aa53/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-03 05:48:09,881 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730a3348-7dc9-430c-9cd0-7e6fbbe7aa53/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:48:09,881 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr358REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1204 more)] === [2021-11-03 05:48:09,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:48:09,882 INFO L85 PathProgramCache]: Analyzing trace with hash 1980977049, now seen corresponding path program 1 times [2021-11-03 05:48:09,882 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:48:09,882 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [499823740] [2021-11-03 05:48:09,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:48:09,883 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:48:09,883 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730a3348-7dc9-430c-9cd0-7e6fbbe7aa53/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:48:09,884 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730a3348-7dc9-430c-9cd0-7e6fbbe7aa53/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:48:09,886 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730a3348-7dc9-430c-9cd0-7e6fbbe7aa53/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-03 05:48:10,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:48:10,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 05:48:10,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:48:10,164 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 05:48:10,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:48:10,210 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 05:48:10,210 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:48:10,210 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [499823740] [2021-11-03 05:48:10,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [499823740] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:48:10,211 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:48:10,211 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-03 05:48:10,211 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257199329] [2021-11-03 05:48:10,212 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 05:48:10,212 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:48:10,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 05:48:10,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-03 05:48:10,213 INFO L87 Difference]: Start difference. First operand 2529 states and 2950 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states 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 05:48:10,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:48:10,342 INFO L93 Difference]: Finished difference Result 4218 states and 4756 transitions. [2021-11-03 05:48:10,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:48:10,343 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 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 22 [2021-11-03 05:48:10,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:48:10,363 INFO L225 Difference]: With dead ends: 4218 [2021-11-03 05:48:10,363 INFO L226 Difference]: Without dead ends: 4218 [2021-11-03 05:48:10,363 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 39 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 05:48:10,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4218 states. [2021-11-03 05:48:10,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4218 to 2491. [2021-11-03 05:48:10,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2491 states, 1519 states have (on average 1.8847926267281105) internal successors, (2863), 2490 states have internal predecessors, (2863), 0 states have call successors, (0), 0 states 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 05:48:10,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2491 states to 2491 states and 2863 transitions. [2021-11-03 05:48:10,413 INFO L78 Accepts]: Start accepts. Automaton has 2491 states and 2863 transitions. Word has length 22 [2021-11-03 05:48:10,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:48:10,413 INFO L470 AbstractCegarLoop]: Abstraction has 2491 states and 2863 transitions. [2021-11-03 05:48:10,422 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states 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 05:48:10,430 INFO L276 IsEmpty]: Start isEmpty. Operand 2491 states and 2863 transitions. [2021-11-03 05:48:10,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-03 05:48:10,431 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:48:10,431 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] [2021-11-03 05:48:10,446 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730a3348-7dc9-430c-9cd0-7e6fbbe7aa53/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-03 05:48:10,632 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730a3348-7dc9-430c-9cd0-7e6fbbe7aa53/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:48:10,632 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr40REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1204 more)] === [2021-11-03 05:48:10,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:48:10,632 INFO L85 PathProgramCache]: Analyzing trace with hash 980278297, now seen corresponding path program 1 times [2021-11-03 05:48:10,633 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:48:10,633 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1730314711] [2021-11-03 05:48:10,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:48:10,633 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:48:10,633 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730a3348-7dc9-430c-9cd0-7e6fbbe7aa53/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:48:10,634 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730a3348-7dc9-430c-9cd0-7e6fbbe7aa53/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:48:10,635 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730a3348-7dc9-430c-9cd0-7e6fbbe7aa53/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-03 05:48:10,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:48:10,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 05:48:10,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:48:10,922 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 05:48:10,922 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:48:10,974 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 05:48:10,974 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:48:10,975 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1730314711] [2021-11-03 05:48:10,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1730314711] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:48:10,975 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:48:10,975 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-03 05:48:10,975 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259707478] [2021-11-03 05:48:10,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 05:48:10,976 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:48:10,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 05:48:10,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-03 05:48:10,977 INFO L87 Difference]: Start difference. First operand 2491 states and 2863 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states 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 05:48:11,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:48:11,108 INFO L93 Difference]: Finished difference Result 4179 states and 4705 transitions. [2021-11-03 05:48:11,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:48:11,109 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 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 22 [2021-11-03 05:48:11,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:48:11,115 INFO L225 Difference]: With dead ends: 4179 [2021-11-03 05:48:11,115 INFO L226 Difference]: Without dead ends: 4179 [2021-11-03 05:48:11,116 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 39 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 05:48:11,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4179 states. [2021-11-03 05:48:11,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4179 to 2469. [2021-11-03 05:48:11,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2469 states, 1511 states have (on average 1.8755790866975512) internal successors, (2834), 2468 states have internal predecessors, (2834), 0 states have call successors, (0), 0 states 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 05:48:11,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2469 states to 2469 states and 2834 transitions. [2021-11-03 05:48:11,164 INFO L78 Accepts]: Start accepts. Automaton has 2469 states and 2834 transitions. Word has length 22 [2021-11-03 05:48:11,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:48:11,164 INFO L470 AbstractCegarLoop]: Abstraction has 2469 states and 2834 transitions. [2021-11-03 05:48:11,165 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states 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 05:48:11,165 INFO L276 IsEmpty]: Start isEmpty. Operand 2469 states and 2834 transitions. [2021-11-03 05:48:11,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-03 05:48:11,166 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:48:11,166 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 05:48:11,178 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730a3348-7dc9-430c-9cd0-7e6fbbe7aa53/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-03 05:48:11,378 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730a3348-7dc9-430c-9cd0-7e6fbbe7aa53/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:48:11,378 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr696REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1204 more)] === [2021-11-03 05:48:11,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:48:11,378 INFO L85 PathProgramCache]: Analyzing trace with hash 1893283832, now seen corresponding path program 1 times [2021-11-03 05:48:11,379 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:48:11,379 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1642791068] [2021-11-03 05:48:11,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:48:11,379 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:48:11,380 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730a3348-7dc9-430c-9cd0-7e6fbbe7aa53/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:48:11,380 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730a3348-7dc9-430c-9cd0-7e6fbbe7aa53/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:48:11,398 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730a3348-7dc9-430c-9cd0-7e6fbbe7aa53/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-03 05:48:11,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:48:11,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 05:48:11,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:48:11,618 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 05:48:11,715 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 05:48:11,715 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:48:11,815 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 05:48:11,816 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:48:11,816 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1642791068] [2021-11-03 05:48:11,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1642791068] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:48:11,816 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:48:11,816 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-03 05:48:11,817 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375691136] [2021-11-03 05:48:11,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:48:11,817 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:48:11,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:48:11,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:48:11,819 INFO L87 Difference]: Start difference. First operand 2469 states and 2834 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 05:48:15,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:48:15,712 INFO L93 Difference]: Finished difference Result 3093 states and 3377 transitions. [2021-11-03 05:48:15,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:48:15,712 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 05:48:15,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:48:15,718 INFO L225 Difference]: With dead ends: 3093 [2021-11-03 05:48:15,718 INFO L226 Difference]: Without dead ends: 3093 [2021-11-03 05:48:15,718 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 50 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 05:48:15,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3093 states. [2021-11-03 05:48:15,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3093 to 2465. [2021-11-03 05:48:15,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2465 states, 1511 states have (on average 1.8729318332230311) internal successors, (2830), 2464 states have internal predecessors, (2830), 0 states have call successors, (0), 0 states 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 05:48:15,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2465 states to 2465 states and 2830 transitions. [2021-11-03 05:48:15,751 INFO L78 Accepts]: Start accepts. Automaton has 2465 states and 2830 transitions. Word has length 27 [2021-11-03 05:48:15,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:48:15,751 INFO L470 AbstractCegarLoop]: Abstraction has 2465 states and 2830 transitions. [2021-11-03 05:48:15,752 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 05:48:15,752 INFO L276 IsEmpty]: Start isEmpty. Operand 2465 states and 2830 transitions. [2021-11-03 05:48:15,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-03 05:48:15,753 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:48:15,753 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 05:48:15,777 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730a3348-7dc9-430c-9cd0-7e6fbbe7aa53/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-03 05:48:15,964 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730a3348-7dc9-430c-9cd0-7e6fbbe7aa53/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:48:15,964 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr697REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1204 more)] === [2021-11-03 05:48:15,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:48:15,964 INFO L85 PathProgramCache]: Analyzing trace with hash 1893283833, now seen corresponding path program 1 times [2021-11-03 05:48:15,965 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:48:15,965 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1360379751] [2021-11-03 05:48:15,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:48:15,965 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:48:15,965 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730a3348-7dc9-430c-9cd0-7e6fbbe7aa53/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:48:15,966 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730a3348-7dc9-430c-9cd0-7e6fbbe7aa53/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:48:15,971 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730a3348-7dc9-430c-9cd0-7e6fbbe7aa53/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-03 05:48:16,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:48:16,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 05:48:16,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:48:16,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-03 05:48:16,487 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 05:48:16,488 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:48:16,910 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 05:48:16,911 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:48:16,911 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1360379751] [2021-11-03 05:48:16,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1360379751] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:48:16,911 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:48:16,911 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-03 05:48:16,912 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941499864] [2021-11-03 05:48:16,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 05:48:16,912 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:48:16,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 05:48:16,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 05:48:16,913 INFO L87 Difference]: Start difference. First operand 2465 states and 2830 transitions. Second operand has 6 states, 5 states have (on average 10.6) internal successors, (53), 6 states have internal predecessors, (53), 0 states have call successors, (0), 0 states 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 05:48:29,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:48:29,418 INFO L93 Difference]: Finished difference Result 3708 states and 4079 transitions. [2021-11-03 05:48:29,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-03 05:48:29,419 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 10.6) internal successors, (53), 6 states have internal predecessors, (53), 0 states have call successors, (0), 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 05:48:29,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:48:29,426 INFO L225 Difference]: With dead ends: 3708 [2021-11-03 05:48:29,426 INFO L226 Difference]: Without dead ends: 3708 [2021-11-03 05:48:29,426 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 05:48:29,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3708 states. [2021-11-03 05:48:29,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3708 to 2498. [2021-11-03 05:48:29,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2498 states, 1545 states have (on average 1.855663430420712) internal successors, (2867), 2497 states have internal predecessors, (2867), 0 states have call successors, (0), 0 states 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 05:48:29,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2498 states to 2498 states and 2867 transitions. [2021-11-03 05:48:29,463 INFO L78 Accepts]: Start accepts. Automaton has 2498 states and 2867 transitions. Word has length 27 [2021-11-03 05:48:29,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:48:29,464 INFO L470 AbstractCegarLoop]: Abstraction has 2498 states and 2867 transitions. [2021-11-03 05:48:29,464 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 10.6) internal successors, (53), 6 states have internal predecessors, (53), 0 states have call successors, (0), 0 states 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 05:48:29,464 INFO L276 IsEmpty]: Start isEmpty. Operand 2498 states and 2867 transitions. [2021-11-03 05:48:29,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-03 05:48:29,465 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:48:29,465 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] [2021-11-03 05:48:29,477 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730a3348-7dc9-430c-9cd0-7e6fbbe7aa53/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-03 05:48:29,677 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730a3348-7dc9-430c-9cd0-7e6fbbe7aa53/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:48:29,677 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr372REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1204 more)] === [2021-11-03 05:48:29,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:48:29,677 INFO L85 PathProgramCache]: Analyzing trace with hash 187122631, now seen corresponding path program 1 times [2021-11-03 05:48:29,678 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:48:29,678 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1550479997] [2021-11-03 05:48:29,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:48:29,678 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:48:29,679 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730a3348-7dc9-430c-9cd0-7e6fbbe7aa53/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:48:29,679 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730a3348-7dc9-430c-9cd0-7e6fbbe7aa53/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:48:29,682 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730a3348-7dc9-430c-9cd0-7e6fbbe7aa53/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-03 05:48:29,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:48:29,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 05:48:29,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:48:30,005 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 05:48:30,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:48:30,138 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:48:30,264 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 05:48:30,264 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:48:30,264 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1550479997] [2021-11-03 05:48:30,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1550479997] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:48:30,264 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:48:30,265 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-03 05:48:30,265 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870325808] [2021-11-03 05:48:30,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:48:30,265 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:48:30,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:48:30,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:48:30,266 INFO L87 Difference]: Start difference. First operand 2498 states and 2867 transitions. Second operand has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states 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 05:48:36,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:48:36,869 INFO L93 Difference]: Finished difference Result 5277 states and 5889 transitions. [2021-11-03 05:48:36,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 05:48:36,870 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 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 36 [2021-11-03 05:48:36,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:48:36,880 INFO L225 Difference]: With dead ends: 5277 [2021-11-03 05:48:36,880 INFO L226 Difference]: Without dead ends: 5277 [2021-11-03 05:48:36,880 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 67 SyntacticMatches, 2 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 05:48:36,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5277 states. [2021-11-03 05:48:36,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5277 to 2495. [2021-11-03 05:48:36,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2495 states, 1545 states have (on average 1.8485436893203884) internal successors, (2856), 2494 states have internal predecessors, (2856), 0 states have call successors, (0), 0 states 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 05:48:36,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2495 states to 2495 states and 2856 transitions. [2021-11-03 05:48:36,946 INFO L78 Accepts]: Start accepts. Automaton has 2495 states and 2856 transitions. Word has length 36 [2021-11-03 05:48:36,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:48:36,946 INFO L470 AbstractCegarLoop]: Abstraction has 2495 states and 2856 transitions. [2021-11-03 05:48:36,946 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states 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 05:48:36,946 INFO L276 IsEmpty]: Start isEmpty. Operand 2495 states and 2856 transitions. [2021-11-03 05:48:36,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-03 05:48:36,950 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:48:36,951 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] [2021-11-03 05:48:36,966 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730a3348-7dc9-430c-9cd0-7e6fbbe7aa53/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-03 05:48:37,162 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730a3348-7dc9-430c-9cd0-7e6fbbe7aa53/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:48:37,163 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr373REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1204 more)] === [2021-11-03 05:48:37,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:48:37,163 INFO L85 PathProgramCache]: Analyzing trace with hash 187122632, now seen corresponding path program 1 times [2021-11-03 05:48:37,164 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:48:37,165 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [558242471] [2021-11-03 05:48:37,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:48:37,166 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:48:37,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730a3348-7dc9-430c-9cd0-7e6fbbe7aa53/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:48:37,166 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730a3348-7dc9-430c-9cd0-7e6fbbe7aa53/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:48:37,169 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730a3348-7dc9-430c-9cd0-7e6fbbe7aa53/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-03 05:48:37,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:48:37,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 05:48:37,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:48:37,495 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 05:48:37,783 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 05:48:37,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:48:38,315 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 05:48:38,315 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:48:38,316 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [558242471] [2021-11-03 05:48:38,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [558242471] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:48:38,316 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:48:38,316 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-03 05:48:38,316 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863216626] [2021-11-03 05:48:38,316 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 05:48:38,317 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:48:38,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 05:48:38,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 05:48:38,317 INFO L87 Difference]: Start difference. First operand 2495 states and 2856 transitions. Second operand has 6 states, 5 states have (on average 13.6) 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 05:48:58,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:48:58,652 INFO L93 Difference]: Finished difference Result 5397 states and 5957 transitions. [2021-11-03 05:48:58,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-03 05:48:58,653 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 13.6) 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 36 [2021-11-03 05:48:58,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:48:58,662 INFO L225 Difference]: With dead ends: 5397 [2021-11-03 05:48:58,662 INFO L226 Difference]: Without dead ends: 5397 [2021-11-03 05:48:58,663 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 67 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 05:48:58,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5397 states. [2021-11-03 05:48:58,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5397 to 2495. [2021-11-03 05:48:58,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2495 states, 1545 states have (on average 1.8459546925566344) internal successors, (2852), 2494 states have internal predecessors, (2852), 0 states have call successors, (0), 0 states 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 05:48:58,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2495 states to 2495 states and 2852 transitions. [2021-11-03 05:48:58,704 INFO L78 Accepts]: Start accepts. Automaton has 2495 states and 2852 transitions. Word has length 36 [2021-11-03 05:48:58,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:48:58,704 INFO L470 AbstractCegarLoop]: Abstraction has 2495 states and 2852 transitions. [2021-11-03 05:48:58,705 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 13.6) 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 05:48:58,705 INFO L276 IsEmpty]: Start isEmpty. Operand 2495 states and 2852 transitions. [2021-11-03 05:48:58,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-03 05:48:58,706 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:48:58,706 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] [2021-11-03 05:48:58,733 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730a3348-7dc9-430c-9cd0-7e6fbbe7aa53/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-03 05:48:58,920 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730a3348-7dc9-430c-9cd0-7e6fbbe7aa53/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:48:58,920 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr54REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1204 more)] === [2021-11-03 05:48:58,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:48:58,921 INFO L85 PathProgramCache]: Analyzing trace with hash -773066201, now seen corresponding path program 1 times [2021-11-03 05:48:58,921 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:48:58,921 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [882724059] [2021-11-03 05:48:58,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:48:58,921 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:48:58,921 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730a3348-7dc9-430c-9cd0-7e6fbbe7aa53/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:48:58,922 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730a3348-7dc9-430c-9cd0-7e6fbbe7aa53/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:48:58,923 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730a3348-7dc9-430c-9cd0-7e6fbbe7aa53/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-03 05:48:59,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:48:59,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 05:48:59,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:48:59,253 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 05:48:59,413 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 05:48:59,413 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:48:59,553 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 05:48:59,553 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:48:59,553 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [882724059] [2021-11-03 05:48:59,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [882724059] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:48:59,554 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:48:59,554 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-03 05:48:59,554 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957584936] [2021-11-03 05:48:59,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:48:59,554 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:48:59,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:48:59,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:48:59,555 INFO L87 Difference]: Start difference. First operand 2495 states and 2852 transitions. Second operand has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states 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 05:49:05,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:49:05,771 INFO L93 Difference]: Finished difference Result 4881 states and 5469 transitions. [2021-11-03 05:49:05,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 05:49:05,771 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 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 36 [2021-11-03 05:49:05,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:49:05,778 INFO L225 Difference]: With dead ends: 4881 [2021-11-03 05:49:05,778 INFO L226 Difference]: Without dead ends: 4881 [2021-11-03 05:49:05,778 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 68 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 05:49:05,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4881 states. [2021-11-03 05:49:05,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4881 to 2491. [2021-11-03 05:49:05,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2491 states, 1545 states have (on average 1.8433656957928803) internal successors, (2848), 2490 states have internal predecessors, (2848), 0 states have call successors, (0), 0 states 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 05:49:05,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2491 states to 2491 states and 2848 transitions. [2021-11-03 05:49:05,814 INFO L78 Accepts]: Start accepts. Automaton has 2491 states and 2848 transitions. Word has length 36 [2021-11-03 05:49:05,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:49:05,815 INFO L470 AbstractCegarLoop]: Abstraction has 2491 states and 2848 transitions. [2021-11-03 05:49:05,815 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states 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 05:49:05,815 INFO L276 IsEmpty]: Start isEmpty. Operand 2491 states and 2848 transitions. [2021-11-03 05:49:05,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-03 05:49:05,815 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:49:05,816 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] [2021-11-03 05:49:05,840 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730a3348-7dc9-430c-9cd0-7e6fbbe7aa53/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2021-11-03 05:49:06,028 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730a3348-7dc9-430c-9cd0-7e6fbbe7aa53/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:49:06,028 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr55REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1204 more)] === [2021-11-03 05:49:06,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:49:06,029 INFO L85 PathProgramCache]: Analyzing trace with hash -773066200, now seen corresponding path program 1 times [2021-11-03 05:49:06,029 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:49:06,030 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [993117262] [2021-11-03 05:49:06,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:49:06,030 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:49:06,030 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730a3348-7dc9-430c-9cd0-7e6fbbe7aa53/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:49:06,031 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730a3348-7dc9-430c-9cd0-7e6fbbe7aa53/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:49:06,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730a3348-7dc9-430c-9cd0-7e6fbbe7aa53/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-03 05:49:06,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:49:06,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 05:49:06,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:49:06,450 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 05:49:06,722 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 05:49:06,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:49:07,209 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 05:49:07,209 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:49:07,209 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [993117262] [2021-11-03 05:49:07,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [993117262] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:49:07,209 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:49:07,209 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-03 05:49:07,210 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880354954] [2021-11-03 05:49:07,210 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 05:49:07,210 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:49:07,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 05:49:07,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 05:49:07,211 INFO L87 Difference]: Start difference. First operand 2491 states and 2848 transitions. Second operand has 6 states, 5 states have (on average 13.6) 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 05:49:21,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:49:21,256 INFO L93 Difference]: Finished difference Result 4786 states and 5254 transitions. [2021-11-03 05:49:21,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-03 05:49:21,257 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 13.6) 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 36 [2021-11-03 05:49:21,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:49:21,260 INFO L225 Difference]: With dead ends: 4786 [2021-11-03 05:49:21,261 INFO L226 Difference]: Without dead ends: 4786 [2021-11-03 05:49:21,261 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 67 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 05:49:21,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4786 states. [2021-11-03 05:49:21,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4786 to 2487. [2021-11-03 05:49:21,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2487 states, 1545 states have (on average 1.840776699029126) internal successors, (2844), 2486 states have internal predecessors, (2844), 0 states have call successors, (0), 0 states 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 05:49:21,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2487 states to 2487 states and 2844 transitions. [2021-11-03 05:49:21,294 INFO L78 Accepts]: Start accepts. Automaton has 2487 states and 2844 transitions. Word has length 36 [2021-11-03 05:49:21,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:49:21,294 INFO L470 AbstractCegarLoop]: Abstraction has 2487 states and 2844 transitions. [2021-11-03 05:49:21,294 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 13.6) 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 05:49:21,295 INFO L276 IsEmpty]: Start isEmpty. Operand 2487 states and 2844 transitions. [2021-11-03 05:49:21,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-03 05:49:21,295 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:49:21,296 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] [2021-11-03 05:49:21,329 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730a3348-7dc9-430c-9cd0-7e6fbbe7aa53/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-03 05:49:21,508 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730a3348-7dc9-430c-9cd0-7e6fbbe7aa53/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:49:21,508 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr704REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1204 more)] === [2021-11-03 05:49:21,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:49:21,509 INFO L85 PathProgramCache]: Analyzing trace with hash -480226171, now seen corresponding path program 1 times [2021-11-03 05:49:21,509 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:49:21,509 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1077127730] [2021-11-03 05:49:21,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:49:21,509 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:49:21,509 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730a3348-7dc9-430c-9cd0-7e6fbbe7aa53/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:49:21,510 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730a3348-7dc9-430c-9cd0-7e6fbbe7aa53/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:49:21,511 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730a3348-7dc9-430c-9cd0-7e6fbbe7aa53/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-03 05:49:21,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:49:21,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 05:49:21,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:49:22,013 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 05:49:22,014 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:49:22,135 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 05:49:22,135 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:49:22,135 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1077127730] [2021-11-03 05:49:22,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1077127730] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:49:22,136 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:49:22,136 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-03 05:49:22,136 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832534676] [2021-11-03 05:49:22,136 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:49:22,136 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:49:22,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:49:22,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:49:22,137 INFO L87 Difference]: Start difference. First operand 2487 states and 2844 transitions. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 0 states have call successors, (0), 0 states 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 05:49:22,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:49:22,184 INFO L93 Difference]: Finished difference Result 2481 states and 2830 transitions. [2021-11-03 05:49:22,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:49:22,184 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 0 states have call successors, (0), 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 40 [2021-11-03 05:49:22,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:49:22,186 INFO L225 Difference]: With dead ends: 2481 [2021-11-03 05:49:22,186 INFO L226 Difference]: Without dead ends: 2481 [2021-11-03 05:49:22,186 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 76 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 05:49:22,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2481 states. [2021-11-03 05:49:22,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2481 to 2481. [2021-11-03 05:49:22,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2481 states, 1539 states have (on average 1.838856400259909) internal successors, (2830), 2480 states have internal predecessors, (2830), 0 states have call successors, (0), 0 states 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 05:49:22,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2481 states to 2481 states and 2830 transitions. [2021-11-03 05:49:22,213 INFO L78 Accepts]: Start accepts. Automaton has 2481 states and 2830 transitions. Word has length 40 [2021-11-03 05:49:22,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:49:22,213 INFO L470 AbstractCegarLoop]: Abstraction has 2481 states and 2830 transitions. [2021-11-03 05:49:22,214 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 0 states have call successors, (0), 0 states 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 05:49:22,214 INFO L276 IsEmpty]: Start isEmpty. Operand 2481 states and 2830 transitions. [2021-11-03 05:49:22,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-03 05:49:22,215 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:49:22,215 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:49:22,227 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730a3348-7dc9-430c-9cd0-7e6fbbe7aa53/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (18)] Ended with exit code 0 [2021-11-03 05:49:22,427 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730a3348-7dc9-430c-9cd0-7e6fbbe7aa53/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:49:22,428 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr704REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1204 more)] === [2021-11-03 05:49:22,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:49:22,428 INFO L85 PathProgramCache]: Analyzing trace with hash -952585927, now seen corresponding path program 1 times [2021-11-03 05:49:22,428 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:49:22,428 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [969912600] [2021-11-03 05:49:22,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:49:22,428 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:49:22,429 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730a3348-7dc9-430c-9cd0-7e6fbbe7aa53/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:49:22,429 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730a3348-7dc9-430c-9cd0-7e6fbbe7aa53/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:49:22,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730a3348-7dc9-430c-9cd0-7e6fbbe7aa53/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-03 05:49:22,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:49:22,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 05:49:22,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:49:23,191 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 05:49:23,191 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:49:23,530 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 05:49:23,530 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:49:23,531 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [969912600] [2021-11-03 05:49:23,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [969912600] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:49:23,531 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:49:23,531 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-03 05:49:23,531 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908337201] [2021-11-03 05:49:23,532 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 05:49:23,532 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:49:23,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 05:49:23,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 05:49:23,533 INFO L87 Difference]: Start difference. First operand 2481 states and 2830 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:49:23,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:49:23,828 INFO L93 Difference]: Finished difference Result 4076 states and 4571 transitions. [2021-11-03 05:49:23,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 05:49:23,829 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-11-03 05:49:23,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:49:23,832 INFO L225 Difference]: With dead ends: 4076 [2021-11-03 05:49:23,832 INFO L226 Difference]: Without dead ends: 4076 [2021-11-03 05:49:23,832 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 93 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 05:49:23,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4076 states. [2021-11-03 05:49:23,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4076 to 3245. [2021-11-03 05:49:23,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3245 states, 2303 states have (on average 1.8085106382978724) internal successors, (4165), 3244 states have internal predecessors, (4165), 0 states have call successors, (0), 0 states 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 05:49:23,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3245 states to 3245 states and 4165 transitions. [2021-11-03 05:49:23,870 INFO L78 Accepts]: Start accepts. Automaton has 3245 states and 4165 transitions. Word has length 48 [2021-11-03 05:49:23,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:49:23,871 INFO L470 AbstractCegarLoop]: Abstraction has 3245 states and 4165 transitions. [2021-11-03 05:49:23,871 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:49:23,871 INFO L276 IsEmpty]: Start isEmpty. Operand 3245 states and 4165 transitions. [2021-11-03 05:49:23,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-03 05:49:23,872 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:49:23,872 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:49:23,886 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730a3348-7dc9-430c-9cd0-7e6fbbe7aa53/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-03 05:49:24,085 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730a3348-7dc9-430c-9cd0-7e6fbbe7aa53/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:49:24,086 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr437REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1204 more)] === [2021-11-03 05:49:24,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:49:24,086 INFO L85 PathProgramCache]: Analyzing trace with hash -1775606781, now seen corresponding path program 1 times [2021-11-03 05:49:24,086 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:49:24,086 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1266668955] [2021-11-03 05:49:24,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:49:24,087 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:49:24,087 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730a3348-7dc9-430c-9cd0-7e6fbbe7aa53/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:49:24,087 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730a3348-7dc9-430c-9cd0-7e6fbbe7aa53/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:49:24,106 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730a3348-7dc9-430c-9cd0-7e6fbbe7aa53/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-03 05:49:24,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:49:24,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 05:49:24,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:49:24,697 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 05:49:24,697 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:49:24,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:49:24,853 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:49:24,854 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1266668955] [2021-11-03 05:49:24,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1266668955] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:49:24,854 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:49:24,854 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-03 05:49:24,854 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554492516] [2021-11-03 05:49:24,854 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:49:24,854 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:49:24,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:49:24,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:49:24,855 INFO L87 Difference]: Start difference. First operand 3245 states and 4165 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:49:24,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:49:24,913 INFO L93 Difference]: Finished difference Result 4650 states and 5656 transitions. [2021-11-03 05:49:24,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:49:24,913 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-11-03 05:49:24,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:49:24,917 INFO L225 Difference]: With dead ends: 4650 [2021-11-03 05:49:24,917 INFO L226 Difference]: Without dead ends: 4650 [2021-11-03 05:49:24,917 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 98 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 05:49:24,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4650 states. [2021-11-03 05:49:24,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4650 to 3221. [2021-11-03 05:49:24,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3221 states, 2279 states have (on average 1.8100043878894252) internal successors, (4125), 3220 states have internal predecessors, (4125), 0 states have call successors, (0), 0 states 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 05:49:24,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3221 states to 3221 states and 4125 transitions. [2021-11-03 05:49:24,963 INFO L78 Accepts]: Start accepts. Automaton has 3221 states and 4125 transitions. Word has length 51 [2021-11-03 05:49:24,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:49:24,963 INFO L470 AbstractCegarLoop]: Abstraction has 3221 states and 4125 transitions. [2021-11-03 05:49:24,964 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:49:24,964 INFO L276 IsEmpty]: Start isEmpty. Operand 3221 states and 4125 transitions. [2021-11-03 05:49:24,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-03 05:49:24,965 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:49:24,965 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] [2021-11-03 05:49:24,981 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730a3348-7dc9-430c-9cd0-7e6fbbe7aa53/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-03 05:49:25,181 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730a3348-7dc9-430c-9cd0-7e6fbbe7aa53/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:49:25,181 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr73REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1204 more)] === [2021-11-03 05:49:25,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:49:25,181 INFO L85 PathProgramCache]: Analyzing trace with hash 732181606, now seen corresponding path program 1 times [2021-11-03 05:49:25,182 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:49:25,182 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [496033408] [2021-11-03 05:49:25,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:49:25,182 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:49:25,182 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730a3348-7dc9-430c-9cd0-7e6fbbe7aa53/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:49:25,183 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730a3348-7dc9-430c-9cd0-7e6fbbe7aa53/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:49:25,184 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730a3348-7dc9-430c-9cd0-7e6fbbe7aa53/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-03 05:49:25,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:49:25,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 05:49:25,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:49:25,842 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 05:49:25,843 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:49:25,998 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 05:49:25,998 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:49:25,999 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [496033408] [2021-11-03 05:49:25,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [496033408] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:49:25,999 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:49:25,999 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-03 05:49:25,999 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682608890] [2021-11-03 05:49:26,000 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:49:26,000 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:49:26,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:49:26,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:49:26,001 INFO L87 Difference]: Start difference. First operand 3221 states and 4125 transitions. Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states 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 05:49:26,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:49:26,067 INFO L93 Difference]: Finished difference Result 4386 states and 5145 transitions. [2021-11-03 05:49:26,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:49:26,067 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 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 54 [2021-11-03 05:49:26,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:49:26,072 INFO L225 Difference]: With dead ends: 4386 [2021-11-03 05:49:26,073 INFO L226 Difference]: Without dead ends: 4386 [2021-11-03 05:49:26,073 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 104 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 05:49:26,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4386 states. [2021-11-03 05:49:26,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4386 to 3209. [2021-11-03 05:49:26,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3209 states, 2267 states have (on average 1.8107631230701366) internal successors, (4105), 3208 states have internal predecessors, (4105), 0 states have call successors, (0), 0 states 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 05:49:26,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3209 states to 3209 states and 4105 transitions. [2021-11-03 05:49:26,116 INFO L78 Accepts]: Start accepts. Automaton has 3209 states and 4105 transitions. Word has length 54 [2021-11-03 05:49:26,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:49:26,116 INFO L470 AbstractCegarLoop]: Abstraction has 3209 states and 4105 transitions. [2021-11-03 05:49:26,117 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states 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 05:49:26,117 INFO L276 IsEmpty]: Start isEmpty. Operand 3209 states and 4105 transitions. [2021-11-03 05:49:26,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-03 05:49:26,118 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:49:26,118 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] [2021-11-03 05:49:26,133 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730a3348-7dc9-430c-9cd0-7e6fbbe7aa53/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-03 05:49:26,333 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730a3348-7dc9-430c-9cd0-7e6fbbe7aa53/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:49:26,333 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr740ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1204 more)] === [2021-11-03 05:49:26,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:49:26,334 INFO L85 PathProgramCache]: Analyzing trace with hash -993308447, now seen corresponding path program 1 times [2021-11-03 05:49:26,335 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:49:26,335 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [593750078] [2021-11-03 05:49:26,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:49:26,335 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:49:26,335 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730a3348-7dc9-430c-9cd0-7e6fbbe7aa53/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:49:26,336 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730a3348-7dc9-430c-9cd0-7e6fbbe7aa53/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:49:26,352 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730a3348-7dc9-430c-9cd0-7e6fbbe7aa53/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-03 05:49:26,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:49:26,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 05:49:26,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:49:26,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:49:26,915 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:49:26,915 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:49:26,970 INFO L354 Elim1Store]: treesize reduction 166, result has 13.5 percent of original size [2021-11-03 05:49:26,971 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 3 case distinctions, treesize of input 30 treesize of output 36 [2021-11-03 05:49:27,041 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-11-03 05:49:27,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 67 treesize of output 23 [2021-11-03 05:49:27,145 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 05:49:27,145 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:49:27,338 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 05:49:27,338 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:49:27,339 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [593750078] [2021-11-03 05:49:27,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [593750078] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:49:27,339 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:49:27,339 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-03 05:49:27,339 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574137503] [2021-11-03 05:49:27,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 05:49:27,339 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:49:27,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 05:49:27,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 05:49:27,340 INFO L87 Difference]: Start difference. First operand 3209 states and 4105 transitions. Second operand has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 0 states have call successors, (0), 0 states 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 05:49:30,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:49:30,438 INFO L93 Difference]: Finished difference Result 3437 states and 4344 transitions. [2021-11-03 05:49:30,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 05:49:30,439 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 0 states have call successors, (0), 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 54 [2021-11-03 05:49:30,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:49:30,442 INFO L225 Difference]: With dead ends: 3437 [2021-11-03 05:49:30,442 INFO L226 Difference]: Without dead ends: 3437 [2021-11-03 05:49:30,442 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-03 05:49:30,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3437 states. [2021-11-03 05:49:30,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3437 to 3175. [2021-11-03 05:49:30,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3175 states, 2233 states have (on average 1.8226600985221675) internal successors, (4070), 3174 states have internal predecessors, (4070), 0 states have call successors, (0), 0 states 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 05:49:30,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3175 states to 3175 states and 4070 transitions. [2021-11-03 05:49:30,472 INFO L78 Accepts]: Start accepts. Automaton has 3175 states and 4070 transitions. Word has length 54 [2021-11-03 05:49:30,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:49:30,472 INFO L470 AbstractCegarLoop]: Abstraction has 3175 states and 4070 transitions. [2021-11-03 05:49:30,473 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 0 states have call successors, (0), 0 states 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 05:49:30,473 INFO L276 IsEmpty]: Start isEmpty. Operand 3175 states and 4070 transitions. [2021-11-03 05:49:30,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-03 05:49:30,474 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:49:30,474 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 05:49:30,501 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730a3348-7dc9-430c-9cd0-7e6fbbe7aa53/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (22)] Ended with exit code 0 [2021-11-03 05:49:30,700 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730a3348-7dc9-430c-9cd0-7e6fbbe7aa53/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:49:30,701 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr437REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1204 more)] === [2021-11-03 05:49:30,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:49:30,701 INFO L85 PathProgramCache]: Analyzing trace with hash -637866953, now seen corresponding path program 1 times [2021-11-03 05:49:30,702 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:49:30,702 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [443944522] [2021-11-03 05:49:30,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:49:30,702 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:49:30,702 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730a3348-7dc9-430c-9cd0-7e6fbbe7aa53/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:49:30,703 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730a3348-7dc9-430c-9cd0-7e6fbbe7aa53/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:49:30,703 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730a3348-7dc9-430c-9cd0-7e6fbbe7aa53/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-03 05:49:31,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:49:31,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 05:49:31,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:49:31,829 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 05:49:31,830 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:49:32,300 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 05:49:32,300 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:49:32,300 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [443944522] [2021-11-03 05:49:32,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [443944522] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:49:32,301 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:49:32,301 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-03 05:49:32,301 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653811664] [2021-11-03 05:49:32,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 05:49:32,302 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:49:32,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 05:49:32,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 05:49:32,304 INFO L87 Difference]: Start difference. First operand 3175 states and 4070 transitions. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 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 05:49:32,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:49:32,461 INFO L93 Difference]: Finished difference Result 4704 states and 5822 transitions. [2021-11-03 05:49:32,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 05:49:32,463 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 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 05:49:32,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:49:32,467 INFO L225 Difference]: With dead ends: 4704 [2021-11-03 05:49:32,467 INFO L226 Difference]: Without dead ends: 4704 [2021-11-03 05:49:32,468 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 115 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 05:49:32,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4704 states. [2021-11-03 05:49:32,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4704 to 3943. [2021-11-03 05:49:32,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3943 states, 3001 states have (on average 1.7887370876374542) internal successors, (5368), 3942 states have internal predecessors, (5368), 0 states have call successors, (0), 0 states 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 05:49:32,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3943 states to 3943 states and 5368 transitions. [2021-11-03 05:49:32,505 INFO L78 Accepts]: Start accepts. Automaton has 3943 states and 5368 transitions. Word has length 59 [2021-11-03 05:49:32,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:49:32,505 INFO L470 AbstractCegarLoop]: Abstraction has 3943 states and 5368 transitions. [2021-11-03 05:49:32,505 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 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 05:49:32,505 INFO L276 IsEmpty]: Start isEmpty. Operand 3943 states and 5368 transitions. [2021-11-03 05:49:32,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-03 05:49:32,506 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:49:32,506 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:49:32,520 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730a3348-7dc9-430c-9cd0-7e6fbbe7aa53/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-03 05:49:32,715 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730a3348-7dc9-430c-9cd0-7e6fbbe7aa53/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:49:32,715 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr391REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1204 more)] === [2021-11-03 05:49:32,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:49:32,716 INFO L85 PathProgramCache]: Analyzing trace with hash -1882812110, now seen corresponding path program 1 times [2021-11-03 05:49:32,716 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:49:32,716 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [940933544] [2021-11-03 05:49:32,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:49:32,716 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:49:32,717 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730a3348-7dc9-430c-9cd0-7e6fbbe7aa53/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:49:32,717 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730a3348-7dc9-430c-9cd0-7e6fbbe7aa53/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:49:32,722 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730a3348-7dc9-430c-9cd0-7e6fbbe7aa53/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-03 05:49:33,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:49:33,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-03 05:49:33,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:49:33,489 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 05:49:33,495 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 05:49:34,219 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-03 05:49:34,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2021-11-03 05:49:34,226 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-03 05:49:34,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 21 [2021-11-03 05:49:34,263 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 05:49:34,264 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:49:39,357 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 05:49:39,357 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:49:39,358 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [940933544] [2021-11-03 05:49:39,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [940933544] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:49:39,358 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:49:39,358 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-03 05:49:39,358 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675548222] [2021-11-03 05:49:39,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 05:49:39,359 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:49:39,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 05:49:39,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=16, Unknown=1, NotChecked=0, Total=30 [2021-11-03 05:49:39,360 INFO L87 Difference]: Start difference. First operand 3943 states and 5368 transitions. Second operand has 6 states, 5 states have (on average 24.0) internal successors, (120), 6 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:50:11,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:50:11,049 INFO L93 Difference]: Finished difference Result 7168 states and 9781 transitions. [2021-11-03 05:50:11,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 05:50:11,050 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 24.0) internal successors, (120), 6 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-11-03 05:50:11,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:50:11,056 INFO L225 Difference]: With dead ends: 7168 [2021-11-03 05:50:11,056 INFO L226 Difference]: Without dead ends: 7168 [2021-11-03 05:50:11,056 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=26, Invalid=28, Unknown=2, NotChecked=0, Total=56 [2021-11-03 05:50:11,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7168 states. [2021-11-03 05:50:11,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7168 to 3887. [2021-11-03 05:50:11,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3887 states, 3009 states have (on average 1.7374543037554004) internal successors, (5228), 3886 states have internal predecessors, (5228), 0 states have call successors, (0), 0 states 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 05:50:11,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3887 states to 3887 states and 5228 transitions. [2021-11-03 05:50:11,104 INFO L78 Accepts]: Start accepts. Automaton has 3887 states and 5228 transitions. Word has length 62 [2021-11-03 05:50:11,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:50:11,105 INFO L470 AbstractCegarLoop]: Abstraction has 3887 states and 5228 transitions. [2021-11-03 05:50:11,105 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 24.0) internal successors, (120), 6 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:50:11,105 INFO L276 IsEmpty]: Start isEmpty. Operand 3887 states and 5228 transitions. [2021-11-03 05:50:11,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-03 05:50:11,106 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:50:11,106 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:50:11,123 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730a3348-7dc9-430c-9cd0-7e6fbbe7aa53/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-03 05:50:11,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730a3348-7dc9-430c-9cd0-7e6fbbe7aa53/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:50:11,323 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr396ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1204 more)] === [2021-11-03 05:50:11,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:50:11,323 INFO L85 PathProgramCache]: Analyzing trace with hash -1203198829, now seen corresponding path program 1 times [2021-11-03 05:50:11,324 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:50:11,324 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [290788080] [2021-11-03 05:50:11,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:50:11,324 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:50:11,324 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730a3348-7dc9-430c-9cd0-7e6fbbe7aa53/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:50:11,325 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730a3348-7dc9-430c-9cd0-7e6fbbe7aa53/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:50:11,326 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730a3348-7dc9-430c-9cd0-7e6fbbe7aa53/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-03 05:50:11,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:50:12,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 05:50:12,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:50:12,164 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 05:50:12,181 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 23 treesize of output 19 [2021-11-03 05:50:12,231 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 25 treesize of output 13 [2021-11-03 05:50:12,260 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 05:50:12,261 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:50:12,415 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 05:50:12,415 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:50:12,415 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [290788080] [2021-11-03 05:50:12,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [290788080] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:50:12,415 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:50:12,416 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-03 05:50:12,416 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473281786] [2021-11-03 05:50:12,416 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 05:50:12,416 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:50:12,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 05:50:12,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-03 05:50:12,417 INFO L87 Difference]: Start difference. First operand 3887 states and 5228 transitions. Second operand has 6 states, 5 states have (on average 13.6) 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 05:50:23,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:50:23,824 INFO L93 Difference]: Finished difference Result 6424 states and 8590 transitions. [2021-11-03 05:50:23,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-03 05:50:23,824 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 13.6) 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 68 [2021-11-03 05:50:23,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:50:23,830 INFO L225 Difference]: With dead ends: 6424 [2021-11-03 05:50:23,830 INFO L226 Difference]: Without dead ends: 6424 [2021-11-03 05:50:23,830 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 128 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-11-03 05:50:23,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6424 states. [2021-11-03 05:50:23,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6424 to 3886. [2021-11-03 05:50:23,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3886 states, 3009 states have (on average 1.7364572947823198) internal successors, (5225), 3885 states have internal predecessors, (5225), 0 states have call successors, (0), 0 states 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 05:50:23,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3886 states to 3886 states and 5225 transitions. [2021-11-03 05:50:23,905 INFO L78 Accepts]: Start accepts. Automaton has 3886 states and 5225 transitions. Word has length 68 [2021-11-03 05:50:23,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:50:23,905 INFO L470 AbstractCegarLoop]: Abstraction has 3886 states and 5225 transitions. [2021-11-03 05:50:23,905 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 13.6) 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 05:50:23,905 INFO L276 IsEmpty]: Start isEmpty. Operand 3886 states and 5225 transitions. [2021-11-03 05:50:23,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-03 05:50:23,906 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:50:23,906 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:50:23,917 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730a3348-7dc9-430c-9cd0-7e6fbbe7aa53/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-03 05:50:24,108 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730a3348-7dc9-430c-9cd0-7e6fbbe7aa53/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:50:24,109 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr78ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1204 more)] === [2021-11-03 05:50:24,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:50:24,109 INFO L85 PathProgramCache]: Analyzing trace with hash -1028979469, now seen corresponding path program 1 times [2021-11-03 05:50:24,110 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:50:24,110 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1339206181] [2021-11-03 05:50:24,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:50:24,110 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:50:24,110 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730a3348-7dc9-430c-9cd0-7e6fbbe7aa53/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:50:24,111 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730a3348-7dc9-430c-9cd0-7e6fbbe7aa53/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:50:24,112 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730a3348-7dc9-430c-9cd0-7e6fbbe7aa53/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-03 05:50:24,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:50:24,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 05:50:24,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:50:24,976 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 05:50:24,993 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 22 treesize of output 18 [2021-11-03 05:50:25,042 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 05:50:25,081 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 05:50:25,081 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:50:25,260 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 05:50:25,261 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:50:25,261 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1339206181] [2021-11-03 05:50:25,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1339206181] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:50:25,261 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:50:25,261 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-03 05:50:25,261 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527310519] [2021-11-03 05:50:25,262 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 05:50:25,262 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:50:25,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 05:50:25,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-03 05:50:25,262 INFO L87 Difference]: Start difference. First operand 3886 states and 5225 transitions. Second operand has 6 states, 5 states have (on average 13.6) 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 05:50:36,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:50:36,863 INFO L93 Difference]: Finished difference Result 6416 states and 8576 transitions. [2021-11-03 05:50:36,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-03 05:50:36,864 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 13.6) 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 68 [2021-11-03 05:50:36,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:50:36,870 INFO L225 Difference]: With dead ends: 6416 [2021-11-03 05:50:36,870 INFO L226 Difference]: Without dead ends: 6416 [2021-11-03 05:50:36,870 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 128 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-11-03 05:50:36,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6416 states. [2021-11-03 05:50:36,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6416 to 3885. [2021-11-03 05:50:36,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3885 states, 3009 states have (on average 1.7357926221335993) internal successors, (5223), 3884 states have internal predecessors, (5223), 0 states have call successors, (0), 0 states 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 05:50:36,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3885 states to 3885 states and 5223 transitions. [2021-11-03 05:50:36,938 INFO L78 Accepts]: Start accepts. Automaton has 3885 states and 5223 transitions. Word has length 68 [2021-11-03 05:50:36,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:50:36,938 INFO L470 AbstractCegarLoop]: Abstraction has 3885 states and 5223 transitions. [2021-11-03 05:50:36,939 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 13.6) 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 05:50:36,939 INFO L276 IsEmpty]: Start isEmpty. Operand 3885 states and 5223 transitions. [2021-11-03 05:50:36,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-03 05:50:36,943 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:50:36,943 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:50:36,958 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730a3348-7dc9-430c-9cd0-7e6fbbe7aa53/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-11-03 05:50:37,157 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730a3348-7dc9-430c-9cd0-7e6fbbe7aa53/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:50:37,158 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr397ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1204 more)] === [2021-11-03 05:50:37,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:50:37,158 INFO L85 PathProgramCache]: Analyzing trace with hash 1355543210, now seen corresponding path program 1 times [2021-11-03 05:50:37,159 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:50:37,159 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [876205248] [2021-11-03 05:50:37,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:50:37,159 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:50:37,159 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730a3348-7dc9-430c-9cd0-7e6fbbe7aa53/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:50:37,160 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730a3348-7dc9-430c-9cd0-7e6fbbe7aa53/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:50:37,161 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730a3348-7dc9-430c-9cd0-7e6fbbe7aa53/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-03 05:50:37,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:50:37,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-03 05:50:37,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:50:38,050 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 05:50:38,077 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 05:50:38,086 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 05:50:38,148 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 05:50:38,151 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 05:50:38,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:50:38,238 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:50:38,725 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 05:50:38,725 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:50:38,725 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [876205248] [2021-11-03 05:50:38,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [876205248] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:50:38,725 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:50:38,725 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-11-03 05:50:38,725 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854714032] [2021-11-03 05:50:38,726 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-03 05:50:38,726 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:50:38,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-03 05:50:38,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-03 05:50:38,726 INFO L87 Difference]: Start difference. First operand 3885 states and 5223 transitions. Second operand has 10 states, 9 states have (on average 8.666666666666666) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:51:17,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:51:17,236 INFO L93 Difference]: Finished difference Result 5915 states and 7866 transitions. [2021-11-03 05:51:17,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-03 05:51:17,237 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 8.666666666666666) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-11-03 05:51:17,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:51:17,242 INFO L225 Difference]: With dead ends: 5915 [2021-11-03 05:51:17,242 INFO L226 Difference]: Without dead ends: 5915 [2021-11-03 05:51:17,243 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 128 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 05:51:17,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5915 states. [2021-11-03 05:51:17,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5915 to 3884. [2021-11-03 05:51:17,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3884 states, 3009 states have (on average 1.7347956131605184) internal successors, (5220), 3883 states have internal predecessors, (5220), 0 states have call successors, (0), 0 states 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 05:51:17,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3884 states to 3884 states and 5220 transitions. [2021-11-03 05:51:17,285 INFO L78 Accepts]: Start accepts. Automaton has 3884 states and 5220 transitions. Word has length 69 [2021-11-03 05:51:17,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:51:17,285 INFO L470 AbstractCegarLoop]: Abstraction has 3884 states and 5220 transitions. [2021-11-03 05:51:17,285 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 8.666666666666666) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:51:17,285 INFO L276 IsEmpty]: Start isEmpty. Operand 3884 states and 5220 transitions. [2021-11-03 05:51:17,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-03 05:51:17,286 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:51:17,286 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:51:17,303 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730a3348-7dc9-430c-9cd0-7e6fbbe7aa53/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-11-03 05:51:17,486 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730a3348-7dc9-430c-9cd0-7e6fbbe7aa53/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:51:17,486 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr79ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1204 more)] === [2021-11-03 05:51:17,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:51:17,487 INFO L85 PathProgramCache]: Analyzing trace with hash -1833592125, now seen corresponding path program 1 times [2021-11-03 05:51:17,487 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:51:17,487 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [413924634] [2021-11-03 05:51:17,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:51:17,488 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:51:17,488 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730a3348-7dc9-430c-9cd0-7e6fbbe7aa53/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:51:17,488 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730a3348-7dc9-430c-9cd0-7e6fbbe7aa53/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:51:17,494 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730a3348-7dc9-430c-9cd0-7e6fbbe7aa53/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-03 05:51:18,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:51:18,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-03 05:51:18,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:51:18,460 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 05:51:18,486 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 05:51:18,497 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 05:51:18,567 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 05:51:18,570 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 05:51:18,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:51:18,646 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:51:19,133 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 05:51:19,133 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:51:19,133 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [413924634] [2021-11-03 05:51:19,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [413924634] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:51:19,133 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:51:19,133 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-11-03 05:51:19,133 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855981752] [2021-11-03 05:51:19,134 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-03 05:51:19,134 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:51:19,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-03 05:51:19,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-03 05:51:19,134 INFO L87 Difference]: Start difference. First operand 3884 states and 5220 transitions. Second operand has 10 states, 9 states have (on average 8.666666666666666) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:51:58,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:51:58,559 INFO L93 Difference]: Finished difference Result 5910 states and 7857 transitions. [2021-11-03 05:51:58,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-03 05:51:58,560 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 8.666666666666666) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-11-03 05:51:58,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:51:58,564 INFO L225 Difference]: With dead ends: 5910 [2021-11-03 05:51:58,564 INFO L226 Difference]: Without dead ends: 5910 [2021-11-03 05:51:58,564 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 128 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 05:51:58,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5910 states. [2021-11-03 05:51:58,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5910 to 3883. [2021-11-03 05:51:58,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3883 states, 3009 states have (on average 1.734130940511798) internal successors, (5218), 3882 states have internal predecessors, (5218), 0 states have call successors, (0), 0 states 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 05:51:58,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3883 states to 3883 states and 5218 transitions. [2021-11-03 05:51:58,599 INFO L78 Accepts]: Start accepts. Automaton has 3883 states and 5218 transitions. Word has length 69 [2021-11-03 05:51:58,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:51:58,600 INFO L470 AbstractCegarLoop]: Abstraction has 3883 states and 5218 transitions. [2021-11-03 05:51:58,600 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 8.666666666666666) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:51:58,600 INFO L276 IsEmpty]: Start isEmpty. Operand 3883 states and 5218 transitions. [2021-11-03 05:51:58,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-03 05:51:58,600 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:51:58,600 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:51:58,612 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730a3348-7dc9-430c-9cd0-7e6fbbe7aa53/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-11-03 05:51:58,801 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730a3348-7dc9-430c-9cd0-7e6fbbe7aa53/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:51:58,801 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr400REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1204 more)] === [2021-11-03 05:51:58,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:51:58,801 INFO L85 PathProgramCache]: Analyzing trace with hash 1361720913, now seen corresponding path program 1 times [2021-11-03 05:51:58,802 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:51:58,802 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1672894643] [2021-11-03 05:51:58,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:51:58,802 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:51:58,802 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730a3348-7dc9-430c-9cd0-7e6fbbe7aa53/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:51:58,804 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730a3348-7dc9-430c-9cd0-7e6fbbe7aa53/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:51:58,805 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730a3348-7dc9-430c-9cd0-7e6fbbe7aa53/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-03 05:51:59,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:51:59,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 05:51:59,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:51:59,834 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 05:51:59,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:52:00,003 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 05:52:00,003 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:52:00,003 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1672894643] [2021-11-03 05:52:00,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1672894643] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:52:00,004 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:52:00,004 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-03 05:52:00,004 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48931803] [2021-11-03 05:52:00,004 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 05:52:00,004 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:52:00,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 05:52:00,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-03 05:52:00,005 INFO L87 Difference]: Start difference. First operand 3883 states and 5218 transitions. Second operand has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:52:00,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:52:00,296 INFO L93 Difference]: Finished difference Result 6438 states and 8589 transitions. [2021-11-03 05:52:00,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-03 05:52:00,297 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2021-11-03 05:52:00,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:52:00,303 INFO L225 Difference]: With dead ends: 6438 [2021-11-03 05:52:00,303 INFO L226 Difference]: Without dead ends: 6438 [2021-11-03 05:52:00,304 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 140 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 05:52:00,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6438 states. [2021-11-03 05:52:00,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6438 to 3898. [2021-11-03 05:52:00,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3898 states, 3024 states have (on average 1.730489417989418) internal successors, (5233), 3897 states have internal predecessors, (5233), 0 states have call successors, (0), 0 states 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 05:52:00,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3898 states to 3898 states and 5233 transitions. [2021-11-03 05:52:00,386 INFO L78 Accepts]: Start accepts. Automaton has 3898 states and 5233 transitions. Word has length 73 [2021-11-03 05:52:00,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:52:00,386 INFO L470 AbstractCegarLoop]: Abstraction has 3898 states and 5233 transitions. [2021-11-03 05:52:00,386 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:52:00,387 INFO L276 IsEmpty]: Start isEmpty. Operand 3898 states and 5233 transitions. [2021-11-03 05:52:00,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-03 05:52:00,387 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:52:00,388 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:52:00,414 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730a3348-7dc9-430c-9cd0-7e6fbbe7aa53/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2021-11-03 05:52:00,600 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730a3348-7dc9-430c-9cd0-7e6fbbe7aa53/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:52:00,601 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr400REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1204 more)] === [2021-11-03 05:52:00,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:52:00,601 INFO L85 PathProgramCache]: Analyzing trace with hash -1412235279, now seen corresponding path program 1 times [2021-11-03 05:52:00,602 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:52:00,602 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1589586802] [2021-11-03 05:52:00,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:52:00,603 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:52:00,603 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730a3348-7dc9-430c-9cd0-7e6fbbe7aa53/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:52:00,603 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730a3348-7dc9-430c-9cd0-7e6fbbe7aa53/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:52:00,604 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730a3348-7dc9-430c-9cd0-7e6fbbe7aa53/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-11-03 05:52:01,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:52:01,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 05:52:01,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:52:01,649 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 05:52:01,649 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:52:01,847 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 05:52:01,847 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:52:01,847 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1589586802] [2021-11-03 05:52:01,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1589586802] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:52:01,847 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1464105847] [2021-11-03 05:52:01,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:52:01,847 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 05:52:01,847 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730a3348-7dc9-430c-9cd0-7e6fbbe7aa53/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 05:52:01,849 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730a3348-7dc9-430c-9cd0-7e6fbbe7aa53/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 05:52:01,850 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730a3348-7dc9-430c-9cd0-7e6fbbe7aa53/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (31)] Waiting until timeout for monitored process [2021-11-03 05:52:03,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:52:03,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 05:52:03,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:52:03,250 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 05:52:03,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:52:03,399 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 05:52:03,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1464105847] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:52:03,399 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882174079] [2021-11-03 05:52:03,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:52:03,399 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 05:52:03,399 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730a3348-7dc9-430c-9cd0-7e6fbbe7aa53/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 05:52:03,401 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730a3348-7dc9-430c-9cd0-7e6fbbe7aa53/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 05:52:03,401 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730a3348-7dc9-430c-9cd0-7e6fbbe7aa53/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-11-03 05:52:04,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:52:04,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 05:52:04,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:52:04,579 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 05:52:04,580 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:52:04,698 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 05:52:04,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [882174079] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:52:04,699 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-03 05:52:04,699 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 10 [2021-11-03 05:52:04,699 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342635544] [2021-11-03 05:52:04,700 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-03 05:52:04,700 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:52:04,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-03 05:52:04,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-11-03 05:52:04,700 INFO L87 Difference]: Start difference. First operand 3898 states and 5233 transitions. Second operand has 10 states, 10 states have (on average 8.1) internal successors, (81), 10 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:52:05,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:52:05,409 INFO L93 Difference]: Finished difference Result 6468 states and 8619 transitions. [2021-11-03 05:52:05,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-03 05:52:05,415 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 8.1) internal successors, (81), 10 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-11-03 05:52:05,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:52:05,422 INFO L225 Difference]: With dead ends: 6468 [2021-11-03 05:52:05,422 INFO L226 Difference]: Without dead ends: 6468 [2021-11-03 05:52:05,423 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 450 GetRequests, 436 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2021-11-03 05:52:05,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6468 states. [2021-11-03 05:52:05,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6468 to 3928. [2021-11-03 05:52:05,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3928 states, 3054 states have (on average 1.7233136869679109) internal successors, (5263), 3927 states have internal predecessors, (5263), 0 states have call successors, (0), 0 states 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 05:52:05,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3928 states to 3928 states and 5263 transitions. [2021-11-03 05:52:05,461 INFO L78 Accepts]: Start accepts. Automaton has 3928 states and 5263 transitions. Word has length 75 [2021-11-03 05:52:05,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:52:05,461 INFO L470 AbstractCegarLoop]: Abstraction has 3928 states and 5263 transitions. [2021-11-03 05:52:05,461 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.1) internal successors, (81), 10 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:52:05,462 INFO L276 IsEmpty]: Start isEmpty. Operand 3928 states and 5263 transitions. [2021-11-03 05:52:05,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-03 05:52:05,462 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:52:05,462 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:52:05,477 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730a3348-7dc9-430c-9cd0-7e6fbbe7aa53/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2021-11-03 05:52:05,667 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730a3348-7dc9-430c-9cd0-7e6fbbe7aa53/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (31)] Forceful destruction successful, exit code 0 [2021-11-03 05:52:05,893 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730a3348-7dc9-430c-9cd0-7e6fbbe7aa53/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-11-03 05:52:06,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730a3348-7dc9-430c-9cd0-7e6fbbe7aa53/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730a3348-7dc9-430c-9cd0-7e6fbbe7aa53/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730a3348-7dc9-430c-9cd0-7e6fbbe7aa53/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 05:52:06,063 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr400REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1204 more)] === [2021-11-03 05:52:06,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:52:06,064 INFO L85 PathProgramCache]: Analyzing trace with hash -547693775, now seen corresponding path program 2 times [2021-11-03 05:52:06,064 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:52:06,064 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [901314028] [2021-11-03 05:52:06,064 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-03 05:52:06,064 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:52:06,065 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730a3348-7dc9-430c-9cd0-7e6fbbe7aa53/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:52:06,065 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730a3348-7dc9-430c-9cd0-7e6fbbe7aa53/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:52:06,066 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730a3348-7dc9-430c-9cd0-7e6fbbe7aa53/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2021-11-03 05:52:07,255 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-03 05:52:07,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 05:52:07,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 05:52:07,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:52:07,286 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 05:52:07,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:52:07,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:52:07,309 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:52:07,376 INFO L354 Elim1Store]: treesize reduction 166, result has 13.5 percent of original size [2021-11-03 05:52:07,376 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 3 case distinctions, treesize of input 30 treesize of output 36 [2021-11-03 05:52:07,476 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-03 05:52:07,476 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 15 treesize of output 15 [2021-11-03 05:52:07,736 INFO L354 Elim1Store]: treesize reduction 229, result has 11.2 percent of original size [2021-11-03 05:52:07,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 66 treesize of output 86 [2021-11-03 05:52:13,348 INFO L354 Elim1Store]: treesize reduction 1963, result has 5.1 percent of original size [2021-11-03 05:52:13,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 39 case distinctions, treesize of input 118 treesize of output 150 [2021-11-03 05:52:23,152 INFO L354 Elim1Store]: treesize reduction 876, result has 0.1 percent of original size [2021-11-03 05:52:23,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 157 treesize of output 67 [2021-11-03 05:52:23,333 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-03 05:52:23,333 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:52:32,536 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ULTIMATE.start_main_~user~0.base_331 (_ BitVec 32))) (or (not (= (_ bv0 1) (bvneg (select |c_#valid| v_ULTIMATE.start_main_~user~0.base_331)))) (forall ((|ULTIMATE.start_main_#t~mem11| (_ BitVec 32)) (|ULTIMATE.start_main_#t~mem12| (_ BitVec 32)) (|ULTIMATE.start_main_#t~mem13| (_ BitVec 32)) (ULTIMATE.start_main_~user~0.offset (_ BitVec 32))) (bvslt (let ((.cse0 (select (store |c_#memory_int| v_ULTIMATE.start_main_~user~0.base_331 (let ((.cse1 (bvmul |ULTIMATE.start_main_#t~mem12| |ULTIMATE.start_main_#t~mem13|))) (store (store (store (store (store (store (store (store (select |c_#memory_int| v_ULTIMATE.start_main_~user~0.base_331) ULTIMATE.start_main_~user~0.offset ((_ extract 7 0) |ULTIMATE.start_main_#t~mem11|)) (bvadd ULTIMATE.start_main_~user~0.offset (_ bv1 32)) ((_ extract 15 8) |ULTIMATE.start_main_#t~mem11|)) (bvadd (_ bv2 32) ULTIMATE.start_main_~user~0.offset) ((_ extract 23 16) |ULTIMATE.start_main_#t~mem11|)) (bvadd (_ bv3 32) ULTIMATE.start_main_~user~0.offset) ((_ extract 31 24) |ULTIMATE.start_main_#t~mem11|)) (bvadd (_ bv4 32) ULTIMATE.start_main_~user~0.offset) ((_ extract 7 0) .cse1)) (bvadd ULTIMATE.start_main_~user~0.offset (_ bv5 32)) ((_ extract 15 8) .cse1)) (bvadd (_ bv6 32) ULTIMATE.start_main_~user~0.offset) ((_ extract 23 16) .cse1)) (bvadd ULTIMATE.start_main_~user~0.offset (_ bv7 32)) ((_ extract 31 24) .cse1)))) |c_ULTIMATE.start_main_~#i~0.base|))) (concat (concat (concat (select .cse0 (bvadd (_ bv3 32) |c_ULTIMATE.start_main_~#i~0.offset|)) (select .cse0 (bvadd (_ bv2 32) |c_ULTIMATE.start_main_~#i~0.offset|))) (select .cse0 (bvadd |c_ULTIMATE.start_main_~#i~0.offset| (_ bv1 32)))) (select .cse0 |c_ULTIMATE.start_main_~#i~0.offset|))) (_ bv10 32))))) is different from false