./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/uthash-2.0.2/uthash_BER_test5-3.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_72a51a80-1975-43f5-839d-2d3302acfb20/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72a51a80-1975-43f5-839d-2d3302acfb20/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_72a51a80-1975-43f5-839d-2d3302acfb20/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72a51a80-1975-43f5-839d-2d3302acfb20/bin/utaipan-aC7eJsxGYH/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_BER_test5-3.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72a51a80-1975-43f5-839d-2d3302acfb20/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_72a51a80-1975-43f5-839d-2d3302acfb20/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 5b724500cddd07446974ec59df8ac86aa980f4ff713324fa73d397377235cbe2 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 04:51:47,115 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 04:51:47,117 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 04:51:47,180 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 04:51:47,180 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 04:51:47,184 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 04:51:47,186 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 04:51:47,190 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 04:51:47,193 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 04:51:47,202 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 04:51:47,204 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 04:51:47,206 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 04:51:47,206 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 04:51:47,209 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 04:51:47,212 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 04:51:47,218 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 04:51:47,220 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 04:51:47,221 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 04:51:47,227 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 04:51:47,238 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 04:51:47,240 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 04:51:47,242 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 04:51:47,245 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 04:51:47,246 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 04:51:47,256 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 04:51:47,256 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 04:51:47,257 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 04:51:47,259 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 04:51:47,260 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 04:51:47,261 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 04:51:47,261 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 04:51:47,262 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 04:51:47,264 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 04:51:47,265 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 04:51:47,267 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 04:51:47,267 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 04:51:47,268 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 04:51:47,268 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 04:51:47,268 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 04:51:47,270 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 04:51:47,271 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 04:51:47,272 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72a51a80-1975-43f5-839d-2d3302acfb20/bin/utaipan-aC7eJsxGYH/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-11-03 04:51:47,326 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 04:51:47,327 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 04:51:47,328 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 04:51:47,334 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 04:51:47,335 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 04:51:47,335 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 04:51:47,335 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-03 04:51:47,335 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 04:51:47,335 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 04:51:47,336 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-03 04:51:47,337 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-03 04:51:47,337 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 04:51:47,337 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-03 04:51:47,338 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-03 04:51:47,338 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-03 04:51:47,339 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-03 04:51:47,339 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-03 04:51:47,340 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 04:51:47,340 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 04:51:47,340 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-03 04:51:47,340 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-03 04:51:47,340 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 04:51:47,341 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 04:51:47,341 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-03 04:51:47,341 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-03 04:51:47,341 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-03 04:51:47,343 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 04:51:47,344 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 04:51:47,344 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 04:51:47,344 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 04:51:47,344 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 04:51:47,345 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 04:51:47,345 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 04:51:47,345 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 04:51:47,345 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 04:51:47,346 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-03 04:51:47,346 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-03 04:51:47,346 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 04:51:47,346 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 04:51:47,347 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_72a51a80-1975-43f5-839d-2d3302acfb20/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72a51a80-1975-43f5-839d-2d3302acfb20/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5b724500cddd07446974ec59df8ac86aa980f4ff713324fa73d397377235cbe2 [2021-11-03 04:51:47,634 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 04:51:47,663 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 04:51:47,666 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 04:51:47,668 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 04:51:47,669 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 04:51:47,670 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72a51a80-1975-43f5-839d-2d3302acfb20/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/uthash-2.0.2/uthash_BER_test5-3.i [2021-11-03 04:51:47,753 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72a51a80-1975-43f5-839d-2d3302acfb20/bin/utaipan-aC7eJsxGYH/data/438ad3044/86e537b906a4476fb109f18ee9ca80a8/FLAGe7d39fffc [2021-11-03 04:51:48,372 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 04:51:48,373 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72a51a80-1975-43f5-839d-2d3302acfb20/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test5-3.i [2021-11-03 04:51:48,412 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72a51a80-1975-43f5-839d-2d3302acfb20/bin/utaipan-aC7eJsxGYH/data/438ad3044/86e537b906a4476fb109f18ee9ca80a8/FLAGe7d39fffc [2021-11-03 04:51:48,577 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72a51a80-1975-43f5-839d-2d3302acfb20/bin/utaipan-aC7eJsxGYH/data/438ad3044/86e537b906a4476fb109f18ee9ca80a8 [2021-11-03 04:51:48,579 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 04:51:48,580 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 04:51:48,584 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 04:51:48,584 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 04:51:48,588 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 04:51:48,589 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:51:48" (1/1) ... [2021-11-03 04:51:48,591 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@df4f1f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:51:48, skipping insertion in model container [2021-11-03 04:51:48,592 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:51:48" (1/1) ... [2021-11-03 04:51:48,599 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 04:51:48,656 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 04:51:49,236 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_72a51a80-1975-43f5-839d-2d3302acfb20/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test5-3.i[33021,33034] [2021-11-03 04:51:49,475 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_72a51a80-1975-43f5-839d-2d3302acfb20/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test5-3.i[49681,49694] [2021-11-03 04:51:49,510 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:51:49,525 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 04:51:49,525 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@7284d07b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:51:49, skipping insertion in model container [2021-11-03 04:51:49,526 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 04:51:49,526 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-03 04:51:49,528 INFO L168 Benchmark]: Toolchain (without parser) took 946.54 ms. Allocated memory was 100.7 MB in the beginning and 121.6 MB in the end (delta: 21.0 MB). Free memory was 65.4 MB in the beginning and 81.3 MB in the end (delta: -15.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-11-03 04:51:49,529 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 100.7 MB. Free memory was 54.9 MB in the beginning and 54.8 MB in the end (delta: 42.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-03 04:51:49,531 INFO L168 Benchmark]: CACSL2BoogieTranslator took 942.26 ms. Allocated memory was 100.7 MB in the beginning and 121.6 MB in the end (delta: 21.0 MB). Free memory was 65.2 MB in the beginning and 81.3 MB in the end (delta: -16.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-11-03 04:51:49,533 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 100.7 MB. Free memory was 54.9 MB in the beginning and 54.8 MB in the end (delta: 42.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 942.26 ms. Allocated memory was 100.7 MB in the beginning and 121.6 MB in the end (delta: 21.0 MB). Free memory was 65.2 MB in the beginning and 81.3 MB in the end (delta: -16.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 737]: Unsupported Syntax Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72a51a80-1975-43f5-839d-2d3302acfb20/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72a51a80-1975-43f5-839d-2d3302acfb20/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_72a51a80-1975-43f5-839d-2d3302acfb20/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72a51a80-1975-43f5-839d-2d3302acfb20/bin/utaipan-aC7eJsxGYH/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_BER_test5-3.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72a51a80-1975-43f5-839d-2d3302acfb20/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_72a51a80-1975-43f5-839d-2d3302acfb20/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 5b724500cddd07446974ec59df8ac86aa980f4ff713324fa73d397377235cbe2 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 04:51:51,964 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 04:51:51,967 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 04:51:52,021 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 04:51:52,022 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 04:51:52,028 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 04:51:52,030 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 04:51:52,034 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 04:51:52,038 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 04:51:52,048 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 04:51:52,049 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 04:51:52,050 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 04:51:52,052 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 04:51:52,054 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 04:51:52,056 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 04:51:52,061 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 04:51:52,063 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 04:51:52,064 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 04:51:52,072 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 04:51:52,079 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 04:51:52,081 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 04:51:52,086 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 04:51:52,089 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 04:51:52,091 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 04:51:52,098 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 04:51:52,098 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 04:51:52,098 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 04:51:52,101 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 04:51:52,101 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 04:51:52,102 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 04:51:52,103 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 04:51:52,104 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 04:51:52,106 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 04:51:52,107 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 04:51:52,108 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 04:51:52,108 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 04:51:52,109 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 04:51:52,110 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 04:51:52,110 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 04:51:52,112 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 04:51:52,113 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 04:51:52,118 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72a51a80-1975-43f5-839d-2d3302acfb20/bin/utaipan-aC7eJsxGYH/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2021-11-03 04:51:52,162 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 04:51:52,162 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 04:51:52,164 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 04:51:52,164 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 04:51:52,164 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 04:51:52,164 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 04:51:52,165 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 04:51:52,165 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 04:51:52,165 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 04:51:52,166 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-03 04:51:52,167 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-03 04:51:52,168 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 04:51:52,168 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 04:51:52,168 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-03 04:51:52,168 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-03 04:51:52,169 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 04:51:52,169 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 04:51:52,169 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-03 04:51:52,169 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-03 04:51:52,170 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-03 04:51:52,170 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 04:51:52,170 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 04:51:52,170 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-03 04:51:52,170 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-03 04:51:52,171 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 04:51:52,171 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 04:51:52,171 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 04:51:52,171 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-03 04:51:52,172 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 04:51:52,172 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 04:51:52,172 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 04:51:52,172 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 04:51:52,173 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-03 04:51:52,173 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-03 04:51:52,173 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 04:51:52,173 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 04:51:52,174 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_72a51a80-1975-43f5-839d-2d3302acfb20/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72a51a80-1975-43f5-839d-2d3302acfb20/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5b724500cddd07446974ec59df8ac86aa980f4ff713324fa73d397377235cbe2 [2021-11-03 04:51:52,603 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 04:51:52,636 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 04:51:52,639 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 04:51:52,641 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 04:51:52,642 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 04:51:52,643 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72a51a80-1975-43f5-839d-2d3302acfb20/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/uthash-2.0.2/uthash_BER_test5-3.i [2021-11-03 04:51:52,725 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72a51a80-1975-43f5-839d-2d3302acfb20/bin/utaipan-aC7eJsxGYH/data/695a8e772/7dd1076895f14385b411e87fc0627ed0/FLAG551316597 [2021-11-03 04:51:53,487 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 04:51:53,488 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72a51a80-1975-43f5-839d-2d3302acfb20/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test5-3.i [2021-11-03 04:51:53,509 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72a51a80-1975-43f5-839d-2d3302acfb20/bin/utaipan-aC7eJsxGYH/data/695a8e772/7dd1076895f14385b411e87fc0627ed0/FLAG551316597 [2021-11-03 04:51:53,657 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72a51a80-1975-43f5-839d-2d3302acfb20/bin/utaipan-aC7eJsxGYH/data/695a8e772/7dd1076895f14385b411e87fc0627ed0 [2021-11-03 04:51:53,659 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 04:51:53,660 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 04:51:53,662 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 04:51:53,663 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 04:51:53,666 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 04:51:53,667 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:51:53" (1/1) ... [2021-11-03 04:51:53,671 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3dd4091 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:51:53, skipping insertion in model container [2021-11-03 04:51:53,672 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:51:53" (1/1) ... [2021-11-03 04:51:53,681 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 04:51:53,769 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 04:51:54,289 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_72a51a80-1975-43f5-839d-2d3302acfb20/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test5-3.i[33021,33034] [2021-11-03 04:51:54,480 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_72a51a80-1975-43f5-839d-2d3302acfb20/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test5-3.i[49681,49694] [2021-11-03 04:51:54,537 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:51:54,565 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-03 04:51:54,595 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 04:51:54,619 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_72a51a80-1975-43f5-839d-2d3302acfb20/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test5-3.i[33021,33034] [2021-11-03 04:51:54,792 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_72a51a80-1975-43f5-839d-2d3302acfb20/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test5-3.i[49681,49694] [2021-11-03 04:51:54,824 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:51:54,839 INFO L203 MainTranslator]: Completed pre-run [2021-11-03 04:51:54,894 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72a51a80-1975-43f5-839d-2d3302acfb20/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test5-3.i[33021,33034] [2021-11-03 04:51:54,963 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_72a51a80-1975-43f5-839d-2d3302acfb20/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test5-3.i[49681,49694] [2021-11-03 04:51:55,017 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:51:55,064 INFO L208 MainTranslator]: Completed translation [2021-11-03 04:51:55,065 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:51:55 WrapperNode [2021-11-03 04:51:55,065 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 04:51:55,066 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-03 04:51:55,066 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-03 04:51:55,066 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-03 04:51:55,074 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:51:55" (1/1) ... [2021-11-03 04:51:55,124 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:51:55" (1/1) ... [2021-11-03 04:51:55,227 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-03 04:51:55,227 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-03 04:51:55,228 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-03 04:51:55,228 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-03 04:51:55,238 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:51:55" (1/1) ... [2021-11-03 04:51:55,238 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:51:55" (1/1) ... [2021-11-03 04:51:55,251 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:51:55" (1/1) ... [2021-11-03 04:51:55,251 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:51:55" (1/1) ... [2021-11-03 04:51:55,375 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:51:55" (1/1) ... [2021-11-03 04:51:55,395 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:51:55" (1/1) ... [2021-11-03 04:51:55,402 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:51:55" (1/1) ... [2021-11-03 04:51:55,416 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-03 04:51:55,417 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-03 04:51:55,417 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-03 04:51:55,418 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-03 04:51:55,418 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:51:55" (1/1) ... [2021-11-03 04:51:55,425 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 04:51:55,437 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72a51a80-1975-43f5-839d-2d3302acfb20/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:51:55,449 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72a51a80-1975-43f5-839d-2d3302acfb20/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-03 04:51:55,466 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72a51a80-1975-43f5-839d-2d3302acfb20/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-03 04:51:55,500 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-03 04:51:55,500 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-03 04:51:55,501 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-03 04:51:55,501 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-03 04:51:55,501 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-03 04:51:55,501 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-11-03 04:51:55,501 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-03 04:51:55,501 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-03 04:51:55,501 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-03 04:51:55,502 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-03 04:51:55,502 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-03 04:51:55,502 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-03 04:52:04,279 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-03 04:52:04,280 INFO L299 CfgBuilder]: Removed 128 assume(true) statements. [2021-11-03 04:52:04,285 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:52:04 BoogieIcfgContainer [2021-11-03 04:52:04,285 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-03 04:52:04,287 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-03 04:52:04,287 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-03 04:52:04,290 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-03 04:52:04,291 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 04:51:53" (1/3) ... [2021-11-03 04:52:04,291 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5bf3281c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:52:04, skipping insertion in model container [2021-11-03 04:52:04,292 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:51:55" (2/3) ... [2021-11-03 04:52:04,292 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5bf3281c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:52:04, skipping insertion in model container [2021-11-03 04:52:04,292 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:52:04" (3/3) ... [2021-11-03 04:52:04,294 INFO L111 eAbstractionObserver]: Analyzing ICFG uthash_BER_test5-3.i [2021-11-03 04:52:04,299 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-03 04:52:04,300 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 936 error locations. [2021-11-03 04:52:04,378 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-03 04:52:04,389 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 04:52:04,389 INFO L340 AbstractCegarLoop]: Starting to check reachability of 936 error locations. [2021-11-03 04:52:04,467 INFO L276 IsEmpty]: Start isEmpty. Operand has 1850 states, 913 states have (on average 2.2573932092004383) internal successors, (2061), 1849 states have internal predecessors, (2061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:52:04,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-03 04:52:04,474 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:52:04,474 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-03 04:52:04,475 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 932 more)] === [2021-11-03 04:52:04,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:52:04,481 INFO L85 PathProgramCache]: Analyzing trace with hash 28698764, now seen corresponding path program 1 times [2021-11-03 04:52:04,493 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:52:04,494 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1921859481] [2021-11-03 04:52:04,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:52:04,495 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:52:04,495 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72a51a80-1975-43f5-839d-2d3302acfb20/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:52:04,499 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72a51a80-1975-43f5-839d-2d3302acfb20/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:52:04,511 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72a51a80-1975-43f5-839d-2d3302acfb20/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-03 04:52:04,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:52:04,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-03 04:52:04,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:52:04,816 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 04:52:04,817 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:52:04,835 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 04:52:04,842 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:52:04,843 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1921859481] [2021-11-03 04:52:04,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1921859481] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:52:04,844 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:52:04,844 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-03 04:52:04,846 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897744234] [2021-11-03 04:52:04,851 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-03 04:52:04,852 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:52:04,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-03 04:52:04,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-03 04:52:04,898 INFO L87 Difference]: Start difference. First operand has 1850 states, 913 states have (on average 2.2573932092004383) internal successors, (2061), 1849 states have internal predecessors, (2061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:52:05,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:52:05,052 INFO L93 Difference]: Finished difference Result 1832 states and 1930 transitions. [2021-11-03 04:52:05,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-03 04:52:05,054 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-11-03 04:52:05,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:52:05,102 INFO L225 Difference]: With dead ends: 1832 [2021-11-03 04:52:05,103 INFO L226 Difference]: Without dead ends: 1830 [2021-11-03 04:52:05,104 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-03 04:52:05,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1830 states. [2021-11-03 04:52:05,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1830 to 1830. [2021-11-03 04:52:05,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1830 states, 904 states have (on average 2.1327433628318584) internal successors, (1928), 1829 states have internal predecessors, (1928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:52:05,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1830 states to 1830 states and 1928 transitions. [2021-11-03 04:52:05,257 INFO L78 Accepts]: Start accepts. Automaton has 1830 states and 1928 transitions. Word has length 5 [2021-11-03 04:52:05,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:52:05,258 INFO L470 AbstractCegarLoop]: Abstraction has 1830 states and 1928 transitions. [2021-11-03 04:52:05,258 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:52:05,258 INFO L276 IsEmpty]: Start isEmpty. Operand 1830 states and 1928 transitions. [2021-11-03 04:52:05,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-03 04:52:05,259 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:52:05,259 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-03 04:52:05,274 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72a51a80-1975-43f5-839d-2d3302acfb20/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-03 04:52:05,469 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72a51a80-1975-43f5-839d-2d3302acfb20/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:52:05,469 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 932 more)] === [2021-11-03 04:52:05,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:52:05,470 INFO L85 PathProgramCache]: Analyzing trace with hash 28698826, now seen corresponding path program 1 times [2021-11-03 04:52:05,471 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:52:05,471 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [311346127] [2021-11-03 04:52:05,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:52:05,471 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:52:05,472 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72a51a80-1975-43f5-839d-2d3302acfb20/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:52:05,472 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72a51a80-1975-43f5-839d-2d3302acfb20/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:52:05,500 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72a51a80-1975-43f5-839d-2d3302acfb20/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-03 04:52:05,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:52:05,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 04:52:05,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:52:05,724 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 04:52:05,743 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 04:52:05,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:52:05,768 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 04:52:05,768 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:52:05,768 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [311346127] [2021-11-03 04:52:05,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [311346127] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:52:05,769 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:52:05,769 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-03 04:52:05,769 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499533990] [2021-11-03 04:52:05,771 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 04:52:05,772 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:52:05,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 04:52:05,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:52:05,776 INFO L87 Difference]: Start difference. First operand 1830 states and 1928 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:52:09,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:52:09,782 INFO L93 Difference]: Finished difference Result 2096 states and 2232 transitions. [2021-11-03 04:52:09,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 04:52:09,783 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-11-03 04:52:09,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:52:09,797 INFO L225 Difference]: With dead ends: 2096 [2021-11-03 04:52:09,805 INFO L226 Difference]: Without dead ends: 2096 [2021-11-03 04:52:09,806 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:52:09,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2096 states. [2021-11-03 04:52:09,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2096 to 1815. [2021-11-03 04:52:09,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1815 states, 980 states have (on average 2.012244897959184) internal successors, (1972), 1814 states have internal predecessors, (1972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:52:09,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1815 states to 1815 states and 1972 transitions. [2021-11-03 04:52:09,861 INFO L78 Accepts]: Start accepts. Automaton has 1815 states and 1972 transitions. Word has length 5 [2021-11-03 04:52:09,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:52:09,862 INFO L470 AbstractCegarLoop]: Abstraction has 1815 states and 1972 transitions. [2021-11-03 04:52:09,863 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:52:09,863 INFO L276 IsEmpty]: Start isEmpty. Operand 1815 states and 1972 transitions. [2021-11-03 04:52:09,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-03 04:52:09,864 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:52:09,864 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-03 04:52:09,882 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72a51a80-1975-43f5-839d-2d3302acfb20/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-11-03 04:52:10,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72a51a80-1975-43f5-839d-2d3302acfb20/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:52:10,076 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 932 more)] === [2021-11-03 04:52:10,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:52:10,076 INFO L85 PathProgramCache]: Analyzing trace with hash 28698827, now seen corresponding path program 1 times [2021-11-03 04:52:10,077 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:52:10,077 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [147979417] [2021-11-03 04:52:10,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:52:10,077 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:52:10,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72a51a80-1975-43f5-839d-2d3302acfb20/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:52:10,081 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72a51a80-1975-43f5-839d-2d3302acfb20/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:52:10,081 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72a51a80-1975-43f5-839d-2d3302acfb20/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-03 04:52:10,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:52:10,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:52:10,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:52:10,283 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 04:52:10,324 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 04:52:10,324 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:52:10,420 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 04:52:10,420 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:52:10,421 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [147979417] [2021-11-03 04:52:10,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [147979417] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:52:10,421 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:52:10,421 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-03 04:52:10,422 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837286484] [2021-11-03 04:52:10,422 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:52:10,422 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:52:10,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:52:10,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:52:10,423 INFO L87 Difference]: Start difference. First operand 1815 states and 1972 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:52:20,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:52:20,445 INFO L93 Difference]: Finished difference Result 2399 states and 2602 transitions. [2021-11-03 04:52:20,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:52:20,446 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-11-03 04:52:20,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:52:20,461 INFO L225 Difference]: With dead ends: 2399 [2021-11-03 04:52:20,461 INFO L226 Difference]: Without dead ends: 2399 [2021-11-03 04:52:20,461 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:52:20,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2399 states. [2021-11-03 04:52:20,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2399 to 1971. [2021-11-03 04:52:20,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1971 states, 1146 states have (on average 1.987783595113438) internal successors, (2278), 1970 states have internal predecessors, (2278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:52:20,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1971 states to 1971 states and 2278 transitions. [2021-11-03 04:52:20,515 INFO L78 Accepts]: Start accepts. Automaton has 1971 states and 2278 transitions. Word has length 5 [2021-11-03 04:52:20,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:52:20,516 INFO L470 AbstractCegarLoop]: Abstraction has 1971 states and 2278 transitions. [2021-11-03 04:52:20,516 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:52:20,516 INFO L276 IsEmpty]: Start isEmpty. Operand 1971 states and 2278 transitions. [2021-11-03 04:52:20,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-03 04:52:20,517 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:52:20,517 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-03 04:52:20,539 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72a51a80-1975-43f5-839d-2d3302acfb20/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-03 04:52:20,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72a51a80-1975-43f5-839d-2d3302acfb20/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:52:20,735 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr640REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 932 more)] === [2021-11-03 04:52:20,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:52:20,736 INFO L85 PathProgramCache]: Analyzing trace with hash 891404513, now seen corresponding path program 1 times [2021-11-03 04:52:20,736 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:52:20,736 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [564566299] [2021-11-03 04:52:20,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:52:20,736 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:52:20,737 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72a51a80-1975-43f5-839d-2d3302acfb20/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:52:20,737 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72a51a80-1975-43f5-839d-2d3302acfb20/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:52:20,743 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72a51a80-1975-43f5-839d-2d3302acfb20/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-03 04:52:20,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:52:20,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 04:52:20,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:52:20,911 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 04:52:20,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:52:20,938 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 04:52:20,938 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:52:20,938 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [564566299] [2021-11-03 04:52:20,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [564566299] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:52:20,939 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:52:20,939 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-03 04:52:20,939 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051447154] [2021-11-03 04:52:20,940 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:52:20,940 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:52:20,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:52:20,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:52:20,942 INFO L87 Difference]: Start difference. First operand 1971 states and 2278 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:52:21,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:52:21,117 INFO L93 Difference]: Finished difference Result 3561 states and 4155 transitions. [2021-11-03 04:52:21,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:52:21,118 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-03 04:52:21,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:52:21,142 INFO L225 Difference]: With dead ends: 3561 [2021-11-03 04:52:21,142 INFO L226 Difference]: Without dead ends: 3561 [2021-11-03 04:52:21,142 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:52:21,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3561 states. [2021-11-03 04:52:21,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3561 to 2934. [2021-11-03 04:52:21,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2934 states, 2109 states have (on average 1.9672830725462305) internal successors, (4149), 2933 states have internal predecessors, (4149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:52:21,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2934 states to 2934 states and 4149 transitions. [2021-11-03 04:52:21,237 INFO L78 Accepts]: Start accepts. Automaton has 2934 states and 4149 transitions. Word has length 6 [2021-11-03 04:52:21,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:52:21,237 INFO L470 AbstractCegarLoop]: Abstraction has 2934 states and 4149 transitions. [2021-11-03 04:52:21,237 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:52:21,238 INFO L276 IsEmpty]: Start isEmpty. Operand 2934 states and 4149 transitions. [2021-11-03 04:52:21,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-03 04:52:21,239 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:52:21,239 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:52:21,255 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72a51a80-1975-43f5-839d-2d3302acfb20/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-03 04:52:21,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72a51a80-1975-43f5-839d-2d3302acfb20/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:52:21,452 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 932 more)] === [2021-11-03 04:52:21,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:52:21,455 INFO L85 PathProgramCache]: Analyzing trace with hash 2013913556, now seen corresponding path program 1 times [2021-11-03 04:52:21,460 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:52:21,461 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [212741386] [2021-11-03 04:52:21,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:52:21,461 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:52:21,462 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72a51a80-1975-43f5-839d-2d3302acfb20/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:52:21,463 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72a51a80-1975-43f5-839d-2d3302acfb20/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:52:21,489 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72a51a80-1975-43f5-839d-2d3302acfb20/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-03 04:52:21,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:52:21,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 04:52:21,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:52:21,732 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 04:52:21,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:52:21,764 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 04:52:21,764 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:52:21,765 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [212741386] [2021-11-03 04:52:21,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [212741386] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:52:21,765 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:52:21,765 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-03 04:52:21,765 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830832812] [2021-11-03 04:52:21,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:52:21,766 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:52:21,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:52:21,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:52:21,767 INFO L87 Difference]: Start difference. First operand 2934 states and 4149 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 04:52:21,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:52:21,839 INFO L93 Difference]: Finished difference Result 2874 states and 4063 transitions. [2021-11-03 04:52:21,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 04:52:21,839 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 04:52:21,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:52:21,856 INFO L225 Difference]: With dead ends: 2874 [2021-11-03 04:52:21,856 INFO L226 Difference]: Without dead ends: 2874 [2021-11-03 04:52:21,856 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 04:52:21,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2874 states. [2021-11-03 04:52:21,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2874 to 2874. [2021-11-03 04:52:21,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2874 states, 2073 states have (on average 1.9599614085865895) internal successors, (4063), 2873 states have internal predecessors, (4063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:52:21,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2874 states to 2874 states and 4063 transitions. [2021-11-03 04:52:21,936 INFO L78 Accepts]: Start accepts. Automaton has 2874 states and 4063 transitions. Word has length 11 [2021-11-03 04:52:21,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:52:21,937 INFO L470 AbstractCegarLoop]: Abstraction has 2874 states and 4063 transitions. [2021-11-03 04:52:21,941 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 04:52:21,942 INFO L276 IsEmpty]: Start isEmpty. Operand 2874 states and 4063 transitions. [2021-11-03 04:52:21,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-03 04:52:21,942 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:52:21,942 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:52:21,960 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72a51a80-1975-43f5-839d-2d3302acfb20/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-03 04:52:22,155 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72a51a80-1975-43f5-839d-2d3302acfb20/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:52:22,155 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 932 more)] === [2021-11-03 04:52:22,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:52:22,156 INFO L85 PathProgramCache]: Analyzing trace with hash -1659327634, now seen corresponding path program 1 times [2021-11-03 04:52:22,156 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:52:22,156 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1049427017] [2021-11-03 04:52:22,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:52:22,156 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:52:22,157 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72a51a80-1975-43f5-839d-2d3302acfb20/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:52:22,158 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72a51a80-1975-43f5-839d-2d3302acfb20/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:52:22,191 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72a51a80-1975-43f5-839d-2d3302acfb20/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-03 04:52:22,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:52:22,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:52:22,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:52:22,435 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 04:52:22,436 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:52:22,481 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 04:52:22,482 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:52:22,482 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1049427017] [2021-11-03 04:52:22,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1049427017] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:52:22,482 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:52:22,482 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-03 04:52:22,483 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968250428] [2021-11-03 04:52:22,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 04:52:22,484 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:52:22,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 04:52:22,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-03 04:52:22,485 INFO L87 Difference]: Start difference. First operand 2874 states and 4063 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 04:52:22,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:52:22,586 INFO L93 Difference]: Finished difference Result 2846 states and 4007 transitions. [2021-11-03 04:52:22,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:52:22,587 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 04:52:22,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:52:22,606 INFO L225 Difference]: With dead ends: 2846 [2021-11-03 04:52:22,606 INFO L226 Difference]: Without dead ends: 2846 [2021-11-03 04:52:22,606 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 04:52:22,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2846 states. [2021-11-03 04:52:22,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2846 to 2844. [2021-11-03 04:52:22,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2844 states, 2057 states have (on average 1.9470102090422945) internal successors, (4005), 2843 states have internal predecessors, (4005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:52:22,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2844 states to 2844 states and 4005 transitions. [2021-11-03 04:52:22,676 INFO L78 Accepts]: Start accepts. Automaton has 2844 states and 4005 transitions. Word has length 13 [2021-11-03 04:52:22,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:52:22,676 INFO L470 AbstractCegarLoop]: Abstraction has 2844 states and 4005 transitions. [2021-11-03 04:52:22,677 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 04:52:22,677 INFO L276 IsEmpty]: Start isEmpty. Operand 2844 states and 4005 transitions. [2021-11-03 04:52:22,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-03 04:52:22,678 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:52:22,678 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 04:52:22,699 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72a51a80-1975-43f5-839d-2d3302acfb20/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-03 04:52:22,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72a51a80-1975-43f5-839d-2d3302acfb20/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:52:22,903 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr42REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 932 more)] === [2021-11-03 04:52:22,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:52:22,903 INFO L85 PathProgramCache]: Analyzing trace with hash 913198236, now seen corresponding path program 1 times [2021-11-03 04:52:22,904 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:52:22,904 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1005914323] [2021-11-03 04:52:22,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:52:22,904 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:52:22,904 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72a51a80-1975-43f5-839d-2d3302acfb20/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:52:22,905 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72a51a80-1975-43f5-839d-2d3302acfb20/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:52:22,906 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72a51a80-1975-43f5-839d-2d3302acfb20/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-03 04:52:23,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:52:23,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:52:23,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:52:23,131 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 04:52:23,280 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 04:52:23,281 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:52:23,401 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 04:52:23,401 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:52:23,402 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1005914323] [2021-11-03 04:52:23,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1005914323] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:52:23,402 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:52:23,402 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-03 04:52:23,403 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108252543] [2021-11-03 04:52:23,403 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:52:23,403 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:52:23,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:52:23,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:52:23,405 INFO L87 Difference]: Start difference. First operand 2844 states and 4005 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 04:52:28,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:52:28,592 INFO L93 Difference]: Finished difference Result 4540 states and 6165 transitions. [2021-11-03 04:52:28,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 04:52:28,592 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 04:52:28,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:52:28,620 INFO L225 Difference]: With dead ends: 4540 [2021-11-03 04:52:28,621 INFO L226 Difference]: Without dead ends: 4540 [2021-11-03 04:52:28,621 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-03 04:52:28,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4540 states. [2021-11-03 04:52:28,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4540 to 2840. [2021-11-03 04:52:28,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2840 states, 2057 states have (on average 1.9431210500729217) internal successors, (3997), 2839 states have internal predecessors, (3997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:52:28,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2840 states to 2840 states and 3997 transitions. [2021-11-03 04:52:28,704 INFO L78 Accepts]: Start accepts. Automaton has 2840 states and 3997 transitions. Word has length 27 [2021-11-03 04:52:28,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:52:28,705 INFO L470 AbstractCegarLoop]: Abstraction has 2840 states and 3997 transitions. [2021-11-03 04:52:28,705 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 04:52:28,705 INFO L276 IsEmpty]: Start isEmpty. Operand 2840 states and 3997 transitions. [2021-11-03 04:52:28,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-03 04:52:28,706 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:52:28,706 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] [2021-11-03 04:52:28,731 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72a51a80-1975-43f5-839d-2d3302acfb20/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-03 04:52:28,919 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72a51a80-1975-43f5-839d-2d3302acfb20/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:52:28,920 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr43REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 932 more)] === [2021-11-03 04:52:28,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:52:28,920 INFO L85 PathProgramCache]: Analyzing trace with hash 913198237, now seen corresponding path program 1 times [2021-11-03 04:52:28,921 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:52:28,921 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [915614214] [2021-11-03 04:52:28,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:52:28,921 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:52:28,922 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72a51a80-1975-43f5-839d-2d3302acfb20/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:52:28,923 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72a51a80-1975-43f5-839d-2d3302acfb20/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:52:28,927 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72a51a80-1975-43f5-839d-2d3302acfb20/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-03 04:52:29,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:52:29,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 04:52:29,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:52:29,193 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 04:52:29,490 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 04:52:29,491 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:52:29,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:52:29,930 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:52:29,930 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [915614214] [2021-11-03 04:52:29,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [915614214] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:52:29,930 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:52:29,931 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-03 04:52:29,931 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876320995] [2021-11-03 04:52:29,931 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 04:52:29,931 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:52:29,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 04:52:29,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:52:29,932 INFO L87 Difference]: Start difference. First operand 2840 states and 3997 transitions. Second operand has 6 states, 5 states have (on average 10.4) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:52:41,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:52:41,589 INFO L93 Difference]: Finished difference Result 3820 states and 5031 transitions. [2021-11-03 04:52:41,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 04:52:41,590 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 10.4) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-11-03 04:52:41,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:52:41,608 INFO L225 Difference]: With dead ends: 3820 [2021-11-03 04:52:41,608 INFO L226 Difference]: Without dead ends: 3820 [2021-11-03 04:52:41,609 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 04:52:41,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3820 states. [2021-11-03 04:52:41,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3820 to 2836. [2021-11-03 04:52:41,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2836 states, 2057 states have (on average 1.9392318911035489) internal successors, (3989), 2835 states have internal predecessors, (3989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:52:41,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2836 states to 2836 states and 3989 transitions. [2021-11-03 04:52:41,675 INFO L78 Accepts]: Start accepts. Automaton has 2836 states and 3989 transitions. Word has length 27 [2021-11-03 04:52:41,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:52:41,675 INFO L470 AbstractCegarLoop]: Abstraction has 2836 states and 3989 transitions. [2021-11-03 04:52:41,675 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 10.4) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:52:41,676 INFO L276 IsEmpty]: Start isEmpty. Operand 2836 states and 3989 transitions. [2021-11-03 04:52:41,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-03 04:52:41,677 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:52:41,677 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:52:41,694 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72a51a80-1975-43f5-839d-2d3302acfb20/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-03 04:52:41,891 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72a51a80-1975-43f5-839d-2d3302acfb20/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:52:41,891 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr107REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 932 more)] === [2021-11-03 04:52:41,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:52:41,891 INFO L85 PathProgramCache]: Analyzing trace with hash 944973104, now seen corresponding path program 1 times [2021-11-03 04:52:41,892 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:52:41,892 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1011337565] [2021-11-03 04:52:41,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:52:41,892 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:52:41,892 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72a51a80-1975-43f5-839d-2d3302acfb20/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:52:41,894 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72a51a80-1975-43f5-839d-2d3302acfb20/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:52:41,934 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72a51a80-1975-43f5-839d-2d3302acfb20/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-03 04:52:42,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:52:42,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:52:42,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:52:42,334 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 04:52:42,334 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:52:42,466 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 04:52:42,466 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:52:42,466 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1011337565] [2021-11-03 04:52:42,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1011337565] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:52:42,466 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:52:42,466 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-03 04:52:42,466 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921576527] [2021-11-03 04:52:42,467 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:52:42,467 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:52:42,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:52:42,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:52:42,468 INFO L87 Difference]: Start difference. First operand 2836 states and 3989 transitions. Second operand has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:52:42,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:52:42,536 INFO L93 Difference]: Finished difference Result 2824 states and 3969 transitions. [2021-11-03 04:52:42,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:52:42,537 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-11-03 04:52:42,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:52:42,551 INFO L225 Difference]: With dead ends: 2824 [2021-11-03 04:52:42,551 INFO L226 Difference]: Without dead ends: 2824 [2021-11-03 04:52:42,552 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-03 04:52:42,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2824 states. [2021-11-03 04:52:42,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2824 to 2824. [2021-11-03 04:52:42,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2824 states, 2045 states have (on average 1.9408312958435208) internal successors, (3969), 2823 states have internal predecessors, (3969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:52:42,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2824 states to 2824 states and 3969 transitions. [2021-11-03 04:52:42,603 INFO L78 Accepts]: Start accepts. Automaton has 2824 states and 3969 transitions. Word has length 42 [2021-11-03 04:52:42,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:52:42,605 INFO L470 AbstractCegarLoop]: Abstraction has 2824 states and 3969 transitions. [2021-11-03 04:52:42,605 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:52:42,605 INFO L276 IsEmpty]: Start isEmpty. Operand 2824 states and 3969 transitions. [2021-11-03 04:52:42,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-03 04:52:42,610 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:52:42,611 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:52:42,629 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72a51a80-1975-43f5-839d-2d3302acfb20/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-03 04:52:42,825 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72a51a80-1975-43f5-839d-2d3302acfb20/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:52:42,825 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr107REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 932 more)] === [2021-11-03 04:52:42,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:52:42,825 INFO L85 PathProgramCache]: Analyzing trace with hash 29098340, now seen corresponding path program 1 times [2021-11-03 04:52:42,826 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:52:42,826 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1378981701] [2021-11-03 04:52:42,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:52:42,826 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:52:42,826 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72a51a80-1975-43f5-839d-2d3302acfb20/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:52:42,827 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72a51a80-1975-43f5-839d-2d3302acfb20/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:52:42,832 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72a51a80-1975-43f5-839d-2d3302acfb20/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-03 04:52:43,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:52:43,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:52:43,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:52:43,615 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 04:52:43,616 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:52:44,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:52:44,025 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:52:44,025 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1378981701] [2021-11-03 04:52:44,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1378981701] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:52:44,026 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:52:44,026 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-03 04:52:44,026 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190471482] [2021-11-03 04:52:44,026 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 04:52:44,026 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:52:44,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 04:52:44,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:52:44,027 INFO L87 Difference]: Start difference. First operand 2824 states and 3969 transitions. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:52:44,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:52:44,264 INFO L93 Difference]: Finished difference Result 3013 states and 4004 transitions. [2021-11-03 04:52:44,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 04:52:44,264 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-11-03 04:52:44,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:52:44,271 INFO L225 Difference]: With dead ends: 3013 [2021-11-03 04:52:44,271 INFO L226 Difference]: Without dead ends: 3013 [2021-11-03 04:52:44,272 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:52:44,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3013 states. [2021-11-03 04:52:44,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3013 to 2640. [2021-11-03 04:52:44,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2640 states, 1861 states have (on average 1.9419666845781838) internal successors, (3614), 2639 states have internal predecessors, (3614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:52:44,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2640 states to 2640 states and 3614 transitions. [2021-11-03 04:52:44,356 INFO L78 Accepts]: Start accepts. Automaton has 2640 states and 3614 transitions. Word has length 50 [2021-11-03 04:52:44,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:52:44,356 INFO L470 AbstractCegarLoop]: Abstraction has 2640 states and 3614 transitions. [2021-11-03 04:52:44,356 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:52:44,357 INFO L276 IsEmpty]: Start isEmpty. Operand 2640 states and 3614 transitions. [2021-11-03 04:52:44,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-03 04:52:44,361 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:52:44,362 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:52:44,384 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72a51a80-1975-43f5-839d-2d3302acfb20/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-03 04:52:44,580 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72a51a80-1975-43f5-839d-2d3302acfb20/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:52:44,580 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr61REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 932 more)] === [2021-11-03 04:52:44,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:52:44,581 INFO L85 PathProgramCache]: Analyzing trace with hash -839399161, now seen corresponding path program 1 times [2021-11-03 04:52:44,582 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:52:44,582 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1844200250] [2021-11-03 04:52:44,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:52:44,582 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:52:44,582 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72a51a80-1975-43f5-839d-2d3302acfb20/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:52:44,583 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72a51a80-1975-43f5-839d-2d3302acfb20/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:52:44,590 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72a51a80-1975-43f5-839d-2d3302acfb20/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-03 04:52:45,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:52:45,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 04:52:45,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:52:45,091 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 04:52:45,101 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 04:52:45,890 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-03 04:52:45,890 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 29 treesize of output 31 [2021-11-03 04:52:45,902 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-03 04:52:45,903 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 28 treesize of output 24 [2021-11-03 04:52:45,953 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 04:52:45,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:52:51,171 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 04:52:51,172 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:52:51,172 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1844200250] [2021-11-03 04:52:51,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1844200250] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:52:51,172 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:52:51,173 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-03 04:52:51,173 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3359648] [2021-11-03 04:52:51,173 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 04:52:51,174 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:52:51,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 04:52:51,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=16, Unknown=1, NotChecked=0, Total=30 [2021-11-03 04:52:51,175 INFO L87 Difference]: Start difference. First operand 2640 states and 3614 transitions. Second operand has 6 states, 5 states have (on average 20.8) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:53:18,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:53:18,708 INFO L93 Difference]: Finished difference Result 4374 states and 5903 transitions. [2021-11-03 04:53:18,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 04:53:18,709 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 20.8) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-11-03 04:53:18,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:53:18,716 INFO L225 Difference]: With dead ends: 4374 [2021-11-03 04:53:18,717 INFO L226 Difference]: Without dead ends: 4374 [2021-11-03 04:53:18,717 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 100 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 04:53:18,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4374 states. [2021-11-03 04:53:18,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4374 to 2798. [2021-11-03 04:53:18,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2798 states, 2057 states have (on average 1.8959649975692756) internal successors, (3900), 2797 states have internal predecessors, (3900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:53:18,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2798 states to 2798 states and 3900 transitions. [2021-11-03 04:53:18,764 INFO L78 Accepts]: Start accepts. Automaton has 2798 states and 3900 transitions. Word has length 53 [2021-11-03 04:53:18,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:53:18,765 INFO L470 AbstractCegarLoop]: Abstraction has 2798 states and 3900 transitions. [2021-11-03 04:53:18,765 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 20.8) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:53:18,765 INFO L276 IsEmpty]: Start isEmpty. Operand 2798 states and 3900 transitions. [2021-11-03 04:53:18,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-03 04:53:18,766 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:53:18,766 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 04:53:18,799 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72a51a80-1975-43f5-839d-2d3302acfb20/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-03 04:53:18,980 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72a51a80-1975-43f5-839d-2d3302acfb20/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:53:18,981 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr66ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 932 more)] === [2021-11-03 04:53:18,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:53:18,981 INFO L85 PathProgramCache]: Analyzing trace with hash -416260760, now seen corresponding path program 1 times [2021-11-03 04:53:18,982 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:53:18,982 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [760075572] [2021-11-03 04:53:18,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:53:18,982 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:53:18,983 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72a51a80-1975-43f5-839d-2d3302acfb20/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:53:18,983 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72a51a80-1975-43f5-839d-2d3302acfb20/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:53:18,985 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72a51a80-1975-43f5-839d-2d3302acfb20/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-03 04:53:19,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:53:19,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 04:53:19,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:53:19,605 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 04:53:19,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-03 04:53:19,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-03 04:53:19,717 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 04:53:19,717 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:53:19,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:53:19,897 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:53:19,897 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [760075572] [2021-11-03 04:53:19,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [760075572] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:53:19,897 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:53:19,898 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-03 04:53:19,898 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092478092] [2021-11-03 04:53:19,898 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 04:53:19,898 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:53:19,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 04:53:19,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:53:19,900 INFO L87 Difference]: Start difference. First operand 2798 states and 3900 transitions. Second operand has 6 states, 5 states have (on average 11.8) internal successors, (59), 6 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:53:30,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:53:30,369 INFO L93 Difference]: Finished difference Result 4082 states and 5468 transitions. [2021-11-03 04:53:30,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-03 04:53:30,370 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 11.8) internal successors, (59), 6 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-11-03 04:53:30,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:53:30,379 INFO L225 Difference]: With dead ends: 4082 [2021-11-03 04:53:30,380 INFO L226 Difference]: Without dead ends: 4082 [2021-11-03 04:53:30,380 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 110 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-11-03 04:53:30,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4082 states. [2021-11-03 04:53:30,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4082 to 2797. [2021-11-03 04:53:30,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2797 states, 2057 states have (on average 1.8949927078269324) internal successors, (3898), 2796 states have internal predecessors, (3898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:53:30,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2797 states to 2797 states and 3898 transitions. [2021-11-03 04:53:30,432 INFO L78 Accepts]: Start accepts. Automaton has 2797 states and 3898 transitions. Word has length 59 [2021-11-03 04:53:30,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:53:30,432 INFO L470 AbstractCegarLoop]: Abstraction has 2797 states and 3898 transitions. [2021-11-03 04:53:30,433 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 11.8) internal successors, (59), 6 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:53:30,433 INFO L276 IsEmpty]: Start isEmpty. Operand 2797 states and 3898 transitions. [2021-11-03 04:53:30,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-03 04:53:30,434 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:53:30,434 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:53:30,459 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72a51a80-1975-43f5-839d-2d3302acfb20/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-03 04:53:30,647 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72a51a80-1975-43f5-839d-2d3302acfb20/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:53:30,647 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr67ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 932 more)] === [2021-11-03 04:53:30,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:53:30,648 INFO L85 PathProgramCache]: Analyzing trace with hash -19181353, now seen corresponding path program 1 times [2021-11-03 04:53:30,648 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:53:30,648 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [912016451] [2021-11-03 04:53:30,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:53:30,648 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:53:30,649 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72a51a80-1975-43f5-839d-2d3302acfb20/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:53:30,649 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72a51a80-1975-43f5-839d-2d3302acfb20/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:53:30,652 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72a51a80-1975-43f5-839d-2d3302acfb20/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-03 04:53:31,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:53:31,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-03 04:53:31,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:53:31,255 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 04:53:31,329 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 04:53:31,341 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 04:53:31,423 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 04:53:31,428 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 04:53:31,508 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 04:53:31,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:53:32,026 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 04:53:32,026 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:53:32,026 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [912016451] [2021-11-03 04:53:32,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [912016451] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:53:32,026 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:53:32,026 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-11-03 04:53:32,026 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979524826] [2021-11-03 04:53:32,027 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-03 04:53:32,027 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:53:32,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-03 04:53:32,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-03 04:53:32,028 INFO L87 Difference]: Start difference. First operand 2797 states and 3898 transitions. Second operand has 10 states, 9 states have (on average 7.666666666666667) internal successors, (69), 10 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:54:11,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:54:11,432 INFO L93 Difference]: Finished difference Result 3854 states and 5137 transitions. [2021-11-03 04:54:11,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-03 04:54:11,434 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 7.666666666666667) internal successors, (69), 10 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-11-03 04:54:11,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:54:11,442 INFO L225 Difference]: With dead ends: 3854 [2021-11-03 04:54:11,443 INFO L226 Difference]: Without dead ends: 3854 [2021-11-03 04:54:11,443 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-11-03 04:54:11,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3854 states. [2021-11-03 04:54:11,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3854 to 2796. [2021-11-03 04:54:11,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2796 states, 2057 states have (on average 1.8940204180845892) internal successors, (3896), 2795 states have internal predecessors, (3896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:54:11,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2796 states to 2796 states and 3896 transitions. [2021-11-03 04:54:11,495 INFO L78 Accepts]: Start accepts. Automaton has 2796 states and 3896 transitions. Word has length 60 [2021-11-03 04:54:11,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:54:11,496 INFO L470 AbstractCegarLoop]: Abstraction has 2796 states and 3896 transitions. [2021-11-03 04:54:11,496 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 7.666666666666667) internal successors, (69), 10 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:54:11,496 INFO L276 IsEmpty]: Start isEmpty. Operand 2796 states and 3896 transitions. [2021-11-03 04:54:11,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-03 04:54:11,497 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:54:11,497 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:54:11,515 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72a51a80-1975-43f5-839d-2d3302acfb20/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-03 04:54:11,714 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72a51a80-1975-43f5-839d-2d3302acfb20/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:54:11,714 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr70REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 932 more)] === [2021-11-03 04:54:11,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:54:11,715 INFO L85 PathProgramCache]: Analyzing trace with hash -1927168386, now seen corresponding path program 1 times [2021-11-03 04:54:11,715 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:54:11,715 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1355129580] [2021-11-03 04:54:11,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:54:11,716 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:54:11,716 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72a51a80-1975-43f5-839d-2d3302acfb20/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:54:11,717 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72a51a80-1975-43f5-839d-2d3302acfb20/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:54:11,756 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72a51a80-1975-43f5-839d-2d3302acfb20/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-03 04:54:12,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:54:12,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:54:12,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:54:12,391 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 04:54:12,391 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:54:12,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:54:12,526 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:54:12,527 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1355129580] [2021-11-03 04:54:12,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1355129580] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:54:12,527 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:54:12,528 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-03 04:54:12,528 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201500054] [2021-11-03 04:54:12,528 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 04:54:12,528 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:54:12,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 04:54:12,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:54:12,529 INFO L87 Difference]: Start difference. First operand 2796 states and 3896 transitions. Second operand has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:54:12,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:54:12,802 INFO L93 Difference]: Finished difference Result 4108 states and 5487 transitions. [2021-11-03 04:54:12,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-03 04:54:12,803 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-11-03 04:54:12,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:54:12,814 INFO L225 Difference]: With dead ends: 4108 [2021-11-03 04:54:12,814 INFO L226 Difference]: Without dead ends: 4108 [2021-11-03 04:54:12,816 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-11-03 04:54:12,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4108 states. [2021-11-03 04:54:12,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4108 to 2814. [2021-11-03 04:54:12,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2814 states, 2075 states have (on average 1.8862650602409639) internal successors, (3914), 2813 states have internal predecessors, (3914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:54:12,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2814 states to 2814 states and 3914 transitions. [2021-11-03 04:54:12,867 INFO L78 Accepts]: Start accepts. Automaton has 2814 states and 3914 transitions. Word has length 64 [2021-11-03 04:54:12,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:54:12,867 INFO L470 AbstractCegarLoop]: Abstraction has 2814 states and 3914 transitions. [2021-11-03 04:54:12,867 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:54:12,868 INFO L276 IsEmpty]: Start isEmpty. Operand 2814 states and 3914 transitions. [2021-11-03 04:54:12,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-03 04:54:12,868 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:54:12,868 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:54:12,890 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72a51a80-1975-43f5-839d-2d3302acfb20/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-03 04:54:13,090 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72a51a80-1975-43f5-839d-2d3302acfb20/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:54:13,091 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr70REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 932 more)] === [2021-11-03 04:54:13,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:54:13,091 INFO L85 PathProgramCache]: Analyzing trace with hash -938951394, now seen corresponding path program 1 times [2021-11-03 04:54:13,092 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:54:13,092 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [110081886] [2021-11-03 04:54:13,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:54:13,092 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:54:13,092 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72a51a80-1975-43f5-839d-2d3302acfb20/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:54:13,093 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72a51a80-1975-43f5-839d-2d3302acfb20/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:54:13,137 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72a51a80-1975-43f5-839d-2d3302acfb20/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-03 04:54:13,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:54:13,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 04:54:13,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:54:13,975 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 04:54:13,975 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:54:14,223 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 04:54:14,224 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:54:14,224 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [110081886] [2021-11-03 04:54:14,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [110081886] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:54:14,224 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1853813004] [2021-11-03 04:54:14,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:54:14,224 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 04:54:14,225 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72a51a80-1975-43f5-839d-2d3302acfb20/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 04:54:14,227 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72a51a80-1975-43f5-839d-2d3302acfb20/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 04:54:14,230 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72a51a80-1975-43f5-839d-2d3302acfb20/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-03 04:54:14,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:54:14,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 04:54:14,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:54:15,167 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 04:54:15,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:54:15,295 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 04:54:15,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1853813004] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:54:15,296 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889355684] [2021-11-03 04:54:15,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:54:15,296 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:54:15,296 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72a51a80-1975-43f5-839d-2d3302acfb20/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:54:15,297 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72a51a80-1975-43f5-839d-2d3302acfb20/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 04:54:15,298 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72a51a80-1975-43f5-839d-2d3302acfb20/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-03 04:54:15,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:54:15,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 04:54:15,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:54:16,064 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 04:54:16,064 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:54:16,180 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 04:54:16,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [889355684] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:54:16,180 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-03 04:54:16,181 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 10 [2021-11-03 04:54:16,181 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791538303] [2021-11-03 04:54:16,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-03 04:54:16,181 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:54:16,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-03 04:54:16,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-11-03 04:54:16,182 INFO L87 Difference]: Start difference. First operand 2814 states and 3914 transitions. Second operand has 10 states, 10 states have (on average 7.2) internal successors, (72), 10 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:54:16,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:54:16,882 INFO L93 Difference]: Finished difference Result 4144 states and 5523 transitions. [2021-11-03 04:54:16,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-03 04:54:16,883 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.2) internal successors, (72), 10 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-11-03 04:54:16,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:54:16,890 INFO L225 Difference]: With dead ends: 4144 [2021-11-03 04:54:16,890 INFO L226 Difference]: Without dead ends: 4144 [2021-11-03 04:54:16,890 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 396 GetRequests, 382 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2021-11-03 04:54:16,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4144 states. [2021-11-03 04:54:16,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4144 to 2850. [2021-11-03 04:54:16,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2850 states, 2111 states have (on average 1.871151113216485) internal successors, (3950), 2849 states have internal predecessors, (3950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:54:16,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2850 states to 2850 states and 3950 transitions. [2021-11-03 04:54:16,935 INFO L78 Accepts]: Start accepts. Automaton has 2850 states and 3950 transitions. Word has length 66 [2021-11-03 04:54:16,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:54:16,935 INFO L470 AbstractCegarLoop]: Abstraction has 2850 states and 3950 transitions. [2021-11-03 04:54:16,935 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.2) internal successors, (72), 10 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:54:16,936 INFO L276 IsEmpty]: Start isEmpty. Operand 2850 states and 3950 transitions. [2021-11-03 04:54:16,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-03 04:54:16,936 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:54:16,936 INFO L513 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:54:16,970 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72a51a80-1975-43f5-839d-2d3302acfb20/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2021-11-03 04:54:17,190 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72a51a80-1975-43f5-839d-2d3302acfb20/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-03 04:54:17,356 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72a51a80-1975-43f5-839d-2d3302acfb20/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2021-11-03 04:54:17,541 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72a51a80-1975-43f5-839d-2d3302acfb20/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72a51a80-1975-43f5-839d-2d3302acfb20/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72a51a80-1975-43f5-839d-2d3302acfb20/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:54:17,542 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr70REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 932 more)] === [2021-11-03 04:54:17,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:54:17,542 INFO L85 PathProgramCache]: Analyzing trace with hash 1093747294, now seen corresponding path program 2 times [2021-11-03 04:54:17,543 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:54:17,543 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [825796683] [2021-11-03 04:54:17,543 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-03 04:54:17,543 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:54:17,543 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72a51a80-1975-43f5-839d-2d3302acfb20/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:54:17,544 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72a51a80-1975-43f5-839d-2d3302acfb20/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:54:17,545 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72a51a80-1975-43f5-839d-2d3302acfb20/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-03 04:54:18,325 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-03 04:54:18,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:54:18,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-03 04:54:18,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:54:18,717 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:54:18,717 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:54:19,259 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:54:19,260 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:54:19,260 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [825796683] [2021-11-03 04:54:19,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [825796683] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:54:19,260 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [819811377] [2021-11-03 04:54:19,260 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-03 04:54:19,261 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 04:54:19,261 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72a51a80-1975-43f5-839d-2d3302acfb20/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 04:54:19,271 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72a51a80-1975-43f5-839d-2d3302acfb20/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 04:54:19,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72a51a80-1975-43f5-839d-2d3302acfb20/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2021-11-03 04:54:21,061 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-03 04:54:21,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:54:21,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-03 04:54:21,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:54:21,295 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:54:21,295 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:54:21,445 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:54:21,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [819811377] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:54:21,445 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580403823] [2021-11-03 04:54:21,445 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-03 04:54:21,446 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:54:21,446 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72a51a80-1975-43f5-839d-2d3302acfb20/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:54:21,446 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72a51a80-1975-43f5-839d-2d3302acfb20/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 04:54:21,448 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72a51a80-1975-43f5-839d-2d3302acfb20/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-03 04:54:38,309 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-03 04:54:38,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:54:38,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-03 04:54:38,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:54:38,553 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:54:38,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:54:38,690 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:54:38,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [580403823] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:54:38,690 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-03 04:54:38,690 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 10, 10] total 18 [2021-11-03 04:54:38,690 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610270150] [2021-11-03 04:54:38,691 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-03 04:54:38,691 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:54:38,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-03 04:54:38,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2021-11-03 04:54:38,692 INFO L87 Difference]: Start difference. First operand 2850 states and 3950 transitions. Second operand has 18 states, 18 states have (on average 4.444444444444445) internal successors, (80), 18 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:54:42,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:54:42,497 INFO L93 Difference]: Finished difference Result 4216 states and 5595 transitions. [2021-11-03 04:54:42,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-03 04:54:42,498 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.444444444444445) internal successors, (80), 18 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-11-03 04:54:42,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:54:42,504 INFO L225 Difference]: With dead ends: 4216 [2021-11-03 04:54:42,504 INFO L226 Difference]: Without dead ends: 4216 [2021-11-03 04:54:42,505 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 428 GetRequests, 398 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=370, Invalid=622, Unknown=0, NotChecked=0, Total=992 [2021-11-03 04:54:42,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4216 states. [2021-11-03 04:54:42,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4216 to 2922. [2021-11-03 04:54:42,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2922 states, 2183 states have (on average 1.842418689876317) internal successors, (4022), 2921 states have internal predecessors, (4022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:54:42,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2922 states to 2922 states and 4022 transitions. [2021-11-03 04:54:42,552 INFO L78 Accepts]: Start accepts. Automaton has 2922 states and 4022 transitions. Word has length 70 [2021-11-03 04:54:42,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:54:42,553 INFO L470 AbstractCegarLoop]: Abstraction has 2922 states and 4022 transitions. [2021-11-03 04:54:42,553 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.444444444444445) internal successors, (80), 18 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:54:42,553 INFO L276 IsEmpty]: Start isEmpty. Operand 2922 states and 4022 transitions. [2021-11-03 04:54:42,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-03 04:54:42,560 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:54:42,560 INFO L513 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:54:42,615 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72a51a80-1975-43f5-839d-2d3302acfb20/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-03 04:54:42,780 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72a51a80-1975-43f5-839d-2d3302acfb20/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (20)] Forceful destruction successful, exit code 0 [2021-11-03 04:54:42,986 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72a51a80-1975-43f5-839d-2d3302acfb20/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (19)] Ended with exit code 0 [2021-11-03 04:54:43,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72a51a80-1975-43f5-839d-2d3302acfb20/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72a51a80-1975-43f5-839d-2d3302acfb20/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72a51a80-1975-43f5-839d-2d3302acfb20/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:54:43,176 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr70REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 932 more)] === [2021-11-03 04:54:43,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:54:43,176 INFO L85 PathProgramCache]: Analyzing trace with hash -1408996130, now seen corresponding path program 3 times [2021-11-03 04:54:43,176 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:54:43,176 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1351170851] [2021-11-03 04:54:43,176 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-03 04:54:43,177 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:54:43,177 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72a51a80-1975-43f5-839d-2d3302acfb20/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:54:43,177 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72a51a80-1975-43f5-839d-2d3302acfb20/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:54:43,182 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72a51a80-1975-43f5-839d-2d3302acfb20/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-03 04:54:44,504 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-03 04:54:44,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:54:44,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-03 04:54:44,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:54:45,169 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:54:45,170 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:54:46,653 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:54:46,653 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:54:46,653 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1351170851] [2021-11-03 04:54:46,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1351170851] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:54:46,653 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [882576593] [2021-11-03 04:54:46,653 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-03 04:54:46,654 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 04:54:46,654 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72a51a80-1975-43f5-839d-2d3302acfb20/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 04:54:46,655 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72a51a80-1975-43f5-839d-2d3302acfb20/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 04:54:46,656 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72a51a80-1975-43f5-839d-2d3302acfb20/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2021-11-03 04:54:54,639 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-03 04:54:54,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:54:54,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-03 04:54:54,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:54:54,982 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:54:54,982 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:54:55,232 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:54:55,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [882576593] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:54:55,233 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90817078] [2021-11-03 04:54:55,233 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-03 04:54:55,233 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:54:55,233 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72a51a80-1975-43f5-839d-2d3302acfb20/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:54:55,234 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72a51a80-1975-43f5-839d-2d3302acfb20/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 04:54:55,235 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72a51a80-1975-43f5-839d-2d3302acfb20/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process