./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/array01-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f88641-9473-4a1a-aa3d-edd940e60473/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f88641-9473-4a1a-aa3d-edd940e60473/bin/uautomizer-DQz5hQGWxF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f88641-9473-4a1a-aa3d-edd940e60473/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f88641-9473-4a1a-aa3d-edd940e60473/bin/uautomizer-DQz5hQGWxF/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/array01-alloca-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f88641-9473-4a1a-aa3d-edd940e60473/bin/uautomizer-DQz5hQGWxF/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f88641-9473-4a1a-aa3d-edd940e60473/bin/uautomizer-DQz5hQGWxF --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 Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c01598788c0e593641b4d52eb46aec8832108f2ffb3b67e30286093c8a1926f8 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 06:08:56,248 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 06:08:56,251 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 06:08:56,320 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 06:08:56,322 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 06:08:56,328 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 06:08:56,330 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 06:08:56,335 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 06:08:56,339 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 06:08:56,346 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 06:08:56,348 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 06:08:56,350 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 06:08:56,351 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 06:08:56,354 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 06:08:56,358 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 06:08:56,363 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 06:08:56,365 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 06:08:56,367 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 06:08:56,370 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 06:08:56,380 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 06:08:56,383 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 06:08:56,385 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 06:08:56,389 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 06:08:56,390 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 06:08:56,402 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 06:08:56,403 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 06:08:56,403 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 06:08:56,406 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 06:08:56,407 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 06:08:56,409 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 06:08:56,410 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 06:08:56,411 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 06:08:56,414 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 06:08:56,416 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 06:08:56,418 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 06:08:56,418 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 06:08:56,419 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 06:08:56,420 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 06:08:56,420 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 06:08:56,422 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 06:08:56,423 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 06:08:56,424 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f88641-9473-4a1a-aa3d-edd940e60473/bin/uautomizer-DQz5hQGWxF/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-11-20 06:08:56,478 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 06:08:56,478 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 06:08:56,479 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 06:08:56,479 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 06:08:56,487 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 06:08:56,488 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 06:08:56,489 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 06:08:56,489 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 06:08:56,489 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 06:08:56,490 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 06:08:56,491 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 06:08:56,492 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-20 06:08:56,492 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 06:08:56,492 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 06:08:56,492 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 06:08:56,492 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-20 06:08:56,493 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-20 06:08:56,493 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-20 06:08:56,493 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 06:08:56,493 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-20 06:08:56,494 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 06:08:56,494 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 06:08:56,494 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 06:08:56,495 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 06:08:56,495 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 06:08:56,495 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 06:08:56,495 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 06:08:56,496 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 06:08:56,496 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-20 06:08:56,498 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 06:08:56,498 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 06:08:56,498 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_78f88641-9473-4a1a-aa3d-edd940e60473/bin/uautomizer-DQz5hQGWxF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f88641-9473-4a1a-aa3d-edd940e60473/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c01598788c0e593641b4d52eb46aec8832108f2ffb3b67e30286093c8a1926f8 [2021-11-20 06:08:56,831 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 06:08:56,854 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 06:08:56,856 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 06:08:56,858 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 06:08:56,859 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 06:08:56,860 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f88641-9473-4a1a-aa3d-edd940e60473/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/array-memsafety/array01-alloca-2.i [2021-11-20 06:08:56,946 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f88641-9473-4a1a-aa3d-edd940e60473/bin/uautomizer-DQz5hQGWxF/data/48d00c2fc/72c72fd0983f434994fadc3d8cc6f57a/FLAGd872a110b [2021-11-20 06:08:57,627 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 06:08:57,628 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f88641-9473-4a1a-aa3d-edd940e60473/sv-benchmarks/c/array-memsafety/array01-alloca-2.i [2021-11-20 06:08:57,652 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f88641-9473-4a1a-aa3d-edd940e60473/bin/uautomizer-DQz5hQGWxF/data/48d00c2fc/72c72fd0983f434994fadc3d8cc6f57a/FLAGd872a110b [2021-11-20 06:08:57,844 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f88641-9473-4a1a-aa3d-edd940e60473/bin/uautomizer-DQz5hQGWxF/data/48d00c2fc/72c72fd0983f434994fadc3d8cc6f57a [2021-11-20 06:08:57,849 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 06:08:57,852 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 06:08:57,856 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 06:08:57,857 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 06:08:57,861 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 06:08:57,862 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:08:57" (1/1) ... [2021-11-20 06:08:57,864 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@22456fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:08:57, skipping insertion in model container [2021-11-20 06:08:57,865 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:08:57" (1/1) ... [2021-11-20 06:08:57,874 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 06:08:57,949 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 06:08:58,394 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:08:58,409 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) [2021-11-20 06:08:58,411 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@10fb0d23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:08:58, skipping insertion in model container [2021-11-20 06:08:58,411 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 06:08:58,412 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-20 06:08:58,415 INFO L158 Benchmark]: Toolchain (without parser) took 561.43ms. Allocated memory is still 117.4MB. Free memory was 83.2MB in the beginning and 91.2MB in the end (delta: -8.0MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2021-11-20 06:08:58,417 INFO L158 Benchmark]: CDTParser took 0.32ms. Allocated memory is still 86.0MB. Free memory was 39.0MB in the beginning and 38.9MB in the end (delta: 46.1kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-20 06:08:58,419 INFO L158 Benchmark]: CACSL2BoogieTranslator took 555.21ms. Allocated memory is still 117.4MB. Free memory was 82.9MB in the beginning and 91.2MB in the end (delta: -8.3MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2021-11-20 06:08:58,422 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32ms. Allocated memory is still 86.0MB. Free memory was 39.0MB in the beginning and 38.9MB in the end (delta: 46.1kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 555.21ms. Allocated memory is still 117.4MB. Free memory was 82.9MB in the beginning and 91.2MB in the end (delta: -8.3MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 529]: 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_78f88641-9473-4a1a-aa3d-edd940e60473/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f88641-9473-4a1a-aa3d-edd940e60473/bin/uautomizer-DQz5hQGWxF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f88641-9473-4a1a-aa3d-edd940e60473/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f88641-9473-4a1a-aa3d-edd940e60473/bin/uautomizer-DQz5hQGWxF/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/array01-alloca-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f88641-9473-4a1a-aa3d-edd940e60473/bin/uautomizer-DQz5hQGWxF/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f88641-9473-4a1a-aa3d-edd940e60473/bin/uautomizer-DQz5hQGWxF --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 Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c01598788c0e593641b4d52eb46aec8832108f2ffb3b67e30286093c8a1926f8 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 06:09:01,268 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 06:09:01,272 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 06:09:01,338 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 06:09:01,339 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 06:09:01,344 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 06:09:01,346 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 06:09:01,354 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 06:09:01,358 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 06:09:01,364 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 06:09:01,366 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 06:09:01,368 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 06:09:01,369 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 06:09:01,372 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 06:09:01,374 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 06:09:01,380 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 06:09:01,382 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 06:09:01,383 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 06:09:01,386 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 06:09:01,395 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 06:09:01,398 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 06:09:01,399 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 06:09:01,402 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 06:09:01,405 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 06:09:01,416 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 06:09:01,416 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 06:09:01,417 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 06:09:01,419 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 06:09:01,420 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 06:09:01,421 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 06:09:01,422 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 06:09:01,423 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 06:09:01,425 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 06:09:01,426 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 06:09:01,428 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 06:09:01,429 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 06:09:01,438 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 06:09:01,439 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 06:09:01,439 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 06:09:01,442 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 06:09:01,443 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 06:09:01,444 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f88641-9473-4a1a-aa3d-edd940e60473/bin/uautomizer-DQz5hQGWxF/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-11-20 06:09:01,500 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 06:09:01,500 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 06:09:01,501 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 06:09:01,501 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 06:09:01,502 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 06:09:01,503 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 06:09:01,505 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 06:09:01,505 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 06:09:01,505 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 06:09:01,506 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 06:09:01,507 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 06:09:01,507 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-20 06:09:01,507 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 06:09:01,508 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 06:09:01,508 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 06:09:01,508 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-20 06:09:01,509 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-20 06:09:01,509 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-20 06:09:01,509 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 06:09:01,509 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-20 06:09:01,510 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-20 06:09:01,510 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-20 06:09:01,510 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 06:09:01,510 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 06:09:01,511 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 06:09:01,511 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 06:09:01,512 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 06:09:01,512 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 06:09:01,512 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 06:09:01,513 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 06:09:01,513 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-11-20 06:09:01,513 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-20 06:09:01,514 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 06:09:01,514 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-20 06:09:01,514 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_78f88641-9473-4a1a-aa3d-edd940e60473/bin/uautomizer-DQz5hQGWxF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f88641-9473-4a1a-aa3d-edd940e60473/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c01598788c0e593641b4d52eb46aec8832108f2ffb3b67e30286093c8a1926f8 [2021-11-20 06:09:02,006 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 06:09:02,033 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 06:09:02,035 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 06:09:02,038 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 06:09:02,039 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 06:09:02,041 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f88641-9473-4a1a-aa3d-edd940e60473/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/array-memsafety/array01-alloca-2.i [2021-11-20 06:09:02,128 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f88641-9473-4a1a-aa3d-edd940e60473/bin/uautomizer-DQz5hQGWxF/data/29bc476a9/e6edd44324914f70a8132a5c6624afaa/FLAG0a1fc11eb [2021-11-20 06:09:02,871 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 06:09:02,872 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f88641-9473-4a1a-aa3d-edd940e60473/sv-benchmarks/c/array-memsafety/array01-alloca-2.i [2021-11-20 06:09:02,893 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f88641-9473-4a1a-aa3d-edd940e60473/bin/uautomizer-DQz5hQGWxF/data/29bc476a9/e6edd44324914f70a8132a5c6624afaa/FLAG0a1fc11eb [2021-11-20 06:09:03,179 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f88641-9473-4a1a-aa3d-edd940e60473/bin/uautomizer-DQz5hQGWxF/data/29bc476a9/e6edd44324914f70a8132a5c6624afaa [2021-11-20 06:09:03,183 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 06:09:03,185 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 06:09:03,190 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 06:09:03,190 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 06:09:03,194 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 06:09:03,196 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:09:03" (1/1) ... [2021-11-20 06:09:03,198 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d3aaf4e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:09:03, skipping insertion in model container [2021-11-20 06:09:03,199 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:09:03" (1/1) ... [2021-11-20 06:09:03,208 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 06:09:03,296 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 06:09:03,763 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:09:03,775 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-20 06:09:03,789 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 06:09:03,849 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:09:03,861 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 06:09:03,933 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:09:03,989 INFO L208 MainTranslator]: Completed translation [2021-11-20 06:09:03,990 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:09:03 WrapperNode [2021-11-20 06:09:03,990 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 06:09:03,991 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 06:09:03,992 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 06:09:03,992 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 06:09:04,001 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:09:03" (1/1) ... [2021-11-20 06:09:04,026 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:09:03" (1/1) ... [2021-11-20 06:09:04,053 INFO L137 Inliner]: procedures = 117, calls = 9, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 55 [2021-11-20 06:09:04,053 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 06:09:04,054 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 06:09:04,054 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 06:09:04,055 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 06:09:04,068 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:09:03" (1/1) ... [2021-11-20 06:09:04,069 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:09:03" (1/1) ... [2021-11-20 06:09:04,081 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:09:03" (1/1) ... [2021-11-20 06:09:04,081 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:09:03" (1/1) ... [2021-11-20 06:09:04,091 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:09:03" (1/1) ... [2021-11-20 06:09:04,095 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:09:03" (1/1) ... [2021-11-20 06:09:04,097 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:09:03" (1/1) ... [2021-11-20 06:09:04,101 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 06:09:04,102 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 06:09:04,102 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 06:09:04,102 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 06:09:04,103 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:09:03" (1/1) ... [2021-11-20 06:09:04,112 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 06:09:04,127 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f88641-9473-4a1a-aa3d-edd940e60473/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:09:04,159 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f88641-9473-4a1a-aa3d-edd940e60473/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 06:09:04,179 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f88641-9473-4a1a-aa3d-edd940e60473/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 06:09:04,227 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-20 06:09:04,227 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-20 06:09:04,227 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-20 06:09:04,228 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-20 06:09:04,229 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 06:09:04,229 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 06:09:04,351 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 06:09:04,356 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 06:09:04,695 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 06:09:04,702 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 06:09:04,715 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-20 06:09:04,718 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:09:04 BoogieIcfgContainer [2021-11-20 06:09:04,718 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 06:09:04,720 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 06:09:04,721 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 06:09:04,724 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 06:09:04,725 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 06:09:03" (1/3) ... [2021-11-20 06:09:04,733 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@419e26f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:09:04, skipping insertion in model container [2021-11-20 06:09:04,734 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:09:03" (2/3) ... [2021-11-20 06:09:04,734 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@419e26f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:09:04, skipping insertion in model container [2021-11-20 06:09:04,735 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:09:04" (3/3) ... [2021-11-20 06:09:04,736 INFO L111 eAbstractionObserver]: Analyzing ICFG array01-alloca-2.i [2021-11-20 06:09:04,742 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 06:09:04,750 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 9 error locations. [2021-11-20 06:09:04,840 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 06:09:04,851 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 [2021-11-20 06:09:04,851 INFO L340 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2021-11-20 06:09:04,885 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 30 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:09:04,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-20 06:09:04,892 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:09:04,893 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-20 06:09:04,894 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-20 06:09:04,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:09:04,901 INFO L85 PathProgramCache]: Analyzing trace with hash 889508873, now seen corresponding path program 1 times [2021-11-20 06:09:04,915 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:09:04,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [216265219] [2021-11-20 06:09:04,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:09:04,918 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:09:04,919 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f88641-9473-4a1a-aa3d-edd940e60473/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:09:04,922 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f88641-9473-4a1a-aa3d-edd940e60473/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:09:04,943 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f88641-9473-4a1a-aa3d-edd940e60473/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-20 06:09:05,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:05,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 21 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 06:09:05,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:09:05,186 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 [2021-11-20 06:09:05,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:09:05,224 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:09:05,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:09:05,275 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:09:05,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [216265219] [2021-11-20 06:09:05,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [216265219] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 06:09:05,276 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:09:05,277 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-20 06:09:05,278 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822542273] [2021-11-20 06:09:05,279 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 06:09:05,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:09:05,285 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:09:05,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:09:05,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:09:05,330 INFO L87 Difference]: Start difference. First operand has 31 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 30 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:09:05,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:09:05,439 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2021-11-20 06:09:05,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:09:05,442 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 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 [2021-11-20 06:09:05,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:09:05,450 INFO L225 Difference]: With dead ends: 30 [2021-11-20 06:09:05,450 INFO L226 Difference]: Without dead ends: 28 [2021-11-20 06:09:05,452 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:09:05,458 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 23 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:09:05,460 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 26 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:09:05,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-11-20 06:09:05,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-11-20 06:09:05,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 20 states have (on average 1.55) internal successors, (31), 27 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:09:05,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2021-11-20 06:09:05,502 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 6 [2021-11-20 06:09:05,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:09:05,504 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2021-11-20 06:09:05,504 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:09:05,504 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2021-11-20 06:09:05,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-20 06:09:05,505 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:09:05,505 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-20 06:09:05,529 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f88641-9473-4a1a-aa3d-edd940e60473/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-20 06:09:05,726 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f88641-9473-4a1a-aa3d-edd940e60473/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:09:05,726 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-20 06:09:05,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:09:05,727 INFO L85 PathProgramCache]: Analyzing trace with hash 889508874, now seen corresponding path program 1 times [2021-11-20 06:09:05,728 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:09:05,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1499294789] [2021-11-20 06:09:05,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:09:05,728 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:09:05,729 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f88641-9473-4a1a-aa3d-edd940e60473/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:09:05,730 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f88641-9473-4a1a-aa3d-edd940e60473/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:09:05,768 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f88641-9473-4a1a-aa3d-edd940e60473/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-20 06:09:05,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:05,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 21 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-20 06:09:05,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:09:05,854 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 [2021-11-20 06:09:05,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:09:05,924 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:09:06,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:09:06,116 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:09:06,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1499294789] [2021-11-20 06:09:06,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1499294789] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 06:09:06,116 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:09:06,116 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-20 06:09:06,117 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101418279] [2021-11-20 06:09:06,117 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 06:09:06,118 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 06:09:06,118 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:09:06,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 06:09:06,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 06:09:06,119 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:09:06,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:09:06,790 INFO L93 Difference]: Finished difference Result 78 states and 85 transitions. [2021-11-20 06:09:06,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 06:09:06,793 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 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 [2021-11-20 06:09:06,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:09:06,794 INFO L225 Difference]: With dead ends: 78 [2021-11-20 06:09:06,794 INFO L226 Difference]: Without dead ends: 78 [2021-11-20 06:09:06,795 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-11-20 06:09:06,796 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 103 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-20 06:09:06,796 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 102 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-20 06:09:06,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-11-20 06:09:06,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 32. [2021-11-20 06:09:06,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 24 states have (on average 1.5) internal successors, (36), 31 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:09:06,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2021-11-20 06:09:06,803 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 6 [2021-11-20 06:09:06,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:09:06,803 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2021-11-20 06:09:06,803 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:09:06,803 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2021-11-20 06:09:06,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-20 06:09:06,804 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:09:06,804 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:09:06,825 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f88641-9473-4a1a-aa3d-edd940e60473/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-20 06:09:07,004 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f88641-9473-4a1a-aa3d-edd940e60473/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:09:07,005 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-20 06:09:07,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:09:07,006 INFO L85 PathProgramCache]: Analyzing trace with hash 176742583, now seen corresponding path program 1 times [2021-11-20 06:09:07,006 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:09:07,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1220125874] [2021-11-20 06:09:07,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:09:07,007 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:09:07,007 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f88641-9473-4a1a-aa3d-edd940e60473/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:09:07,008 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f88641-9473-4a1a-aa3d-edd940e60473/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:09:07,048 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f88641-9473-4a1a-aa3d-edd940e60473/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-20 06:09:07,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:07,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-20 06:09:07,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:09:07,094 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 [2021-11-20 06:09:07,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:09:07,136 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:09:07,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:09:07,183 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:09:07,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1220125874] [2021-11-20 06:09:07,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1220125874] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 06:09:07,185 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:09:07,185 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-20 06:09:07,185 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708311673] [2021-11-20 06:09:07,186 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 06:09:07,186 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:09:07,186 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:09:07,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:09:07,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:09:07,188 INFO L87 Difference]: Start difference. First operand 32 states and 36 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) [2021-11-20 06:09:07,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:09:07,322 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2021-11-20 06:09:07,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:09:07,324 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 8 [2021-11-20 06:09:07,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:09:07,325 INFO L225 Difference]: With dead ends: 29 [2021-11-20 06:09:07,325 INFO L226 Difference]: Without dead ends: 29 [2021-11-20 06:09:07,326 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:09:07,327 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 33 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:09:07,328 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 26 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:09:07,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-11-20 06:09:07,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-11-20 06:09:07,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.375) internal successors, (33), 28 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:09:07,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2021-11-20 06:09:07,335 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 8 [2021-11-20 06:09:07,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:09:07,335 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2021-11-20 06:09:07,335 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) [2021-11-20 06:09:07,336 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2021-11-20 06:09:07,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-20 06:09:07,336 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:09:07,336 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:09:07,348 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f88641-9473-4a1a-aa3d-edd940e60473/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-20 06:09:07,548 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f88641-9473-4a1a-aa3d-edd940e60473/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:09:07,548 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-20 06:09:07,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:09:07,549 INFO L85 PathProgramCache]: Analyzing trace with hash 176742584, now seen corresponding path program 1 times [2021-11-20 06:09:07,549 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:09:07,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2046732968] [2021-11-20 06:09:07,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:09:07,550 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:09:07,550 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f88641-9473-4a1a-aa3d-edd940e60473/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:09:07,551 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f88641-9473-4a1a-aa3d-edd940e60473/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:09:07,576 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f88641-9473-4a1a-aa3d-edd940e60473/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-20 06:09:07,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:07,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-20 06:09:07,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:09:07,666 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 8 treesize of output 7 [2021-11-20 06:09:07,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:09:07,765 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:09:08,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:09:08,198 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:09:08,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2046732968] [2021-11-20 06:09:08,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2046732968] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 06:09:08,199 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:09:08,199 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 5] imperfect sequences [] total 8 [2021-11-20 06:09:08,199 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272217413] [2021-11-20 06:09:08,199 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 06:09:08,200 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 06:09:08,200 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:09:08,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 06:09:08,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-20 06:09:08,201 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand has 8 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:09:08,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:09:08,710 INFO L93 Difference]: Finished difference Result 35 states and 38 transitions. [2021-11-20 06:09:08,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 06:09:08,712 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-20 06:09:08,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:09:08,713 INFO L225 Difference]: With dead ends: 35 [2021-11-20 06:09:08,713 INFO L226 Difference]: Without dead ends: 35 [2021-11-20 06:09:08,714 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-20 06:09:08,715 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 70 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:09:08,715 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 34 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 06:09:08,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-11-20 06:09:08,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 27. [2021-11-20 06:09:08,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 26 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:09:08,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2021-11-20 06:09:08,719 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 8 [2021-11-20 06:09:08,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:09:08,720 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2021-11-20 06:09:08,720 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:09:08,720 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2021-11-20 06:09:08,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-20 06:09:08,721 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:09:08,721 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:09:08,733 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f88641-9473-4a1a-aa3d-edd940e60473/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-20 06:09:08,921 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f88641-9473-4a1a-aa3d-edd940e60473/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:09:08,921 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-20 06:09:08,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:09:08,922 INFO L85 PathProgramCache]: Analyzing trace with hash -1091210163, now seen corresponding path program 1 times [2021-11-20 06:09:08,922 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:09:08,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1981953579] [2021-11-20 06:09:08,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:09:08,923 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:09:08,923 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f88641-9473-4a1a-aa3d-edd940e60473/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:09:08,924 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f88641-9473-4a1a-aa3d-edd940e60473/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:09:08,927 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f88641-9473-4a1a-aa3d-edd940e60473/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-20 06:09:08,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:08,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 06:09:08,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:09:09,045 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:09:09,045 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:09:09,116 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:09:09,117 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:09:09,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1981953579] [2021-11-20 06:09:09,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1981953579] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:09:09,117 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:09:09,117 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-11-20 06:09:09,118 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249129041] [2021-11-20 06:09:09,118 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:09:09,118 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 06:09:09,118 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:09:09,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 06:09:09,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-11-20 06:09:09,119 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:09:09,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:09:09,206 INFO L93 Difference]: Finished difference Result 49 states and 55 transitions. [2021-11-20 06:09:09,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 06:09:09,208 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 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 10 [2021-11-20 06:09:09,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:09:09,208 INFO L225 Difference]: With dead ends: 49 [2021-11-20 06:09:09,208 INFO L226 Difference]: Without dead ends: 49 [2021-11-20 06:09:09,209 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-11-20 06:09:09,210 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 51 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:09:09,210 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 104 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:09:09,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-11-20 06:09:09,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 33. [2021-11-20 06:09:09,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 32 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:09:09,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2021-11-20 06:09:09,216 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 10 [2021-11-20 06:09:09,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:09:09,216 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2021-11-20 06:09:09,217 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:09:09,217 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2021-11-20 06:09:09,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-20 06:09:09,217 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:09:09,218 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:09:09,229 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f88641-9473-4a1a-aa3d-edd940e60473/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-20 06:09:09,428 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f88641-9473-4a1a-aa3d-edd940e60473/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:09:09,430 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-20 06:09:09,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:09:09,430 INFO L85 PathProgramCache]: Analyzing trace with hash -1900556789, now seen corresponding path program 1 times [2021-11-20 06:09:09,431 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:09:09,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2063952312] [2021-11-20 06:09:09,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:09:09,432 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:09:09,432 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f88641-9473-4a1a-aa3d-edd940e60473/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:09:09,432 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f88641-9473-4a1a-aa3d-edd940e60473/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:09:09,433 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f88641-9473-4a1a-aa3d-edd940e60473/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-20 06:09:09,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:09,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-20 06:09:09,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:09:09,526 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 8 treesize of output 7 [2021-11-20 06:09:09,762 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:09:09,762 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:09:10,462 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:09:10,462 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:09:10,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2063952312] [2021-11-20 06:09:10,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2063952312] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:09:10,464 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:09:10,465 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-11-20 06:09:10,465 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904564105] [2021-11-20 06:09:10,466 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:09:10,466 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-20 06:09:10,466 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:09:10,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-20 06:09:10,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-11-20 06:09:10,467 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 10 states, 9 states have (on average 2.0) internal successors, (18), 10 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:09:10,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:09:10,924 INFO L93 Difference]: Finished difference Result 57 states and 65 transitions. [2021-11-20 06:09:10,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 06:09:10,926 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 10 states have internal predecessors, (18), 0 states have call successors, (0), 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 10 [2021-11-20 06:09:10,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:09:10,927 INFO L225 Difference]: With dead ends: 57 [2021-11-20 06:09:10,927 INFO L226 Difference]: Without dead ends: 57 [2021-11-20 06:09:10,928 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-11-20 06:09:10,929 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 72 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 5 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 06:09:10,929 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 72 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 60 Invalid, 0 Unknown, 5 Unchecked, 0.4s Time] [2021-11-20 06:09:10,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-11-20 06:09:10,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 41. [2021-11-20 06:09:10,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 38 states have (on average 1.236842105263158) internal successors, (47), 40 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:09:10,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2021-11-20 06:09:10,935 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 10 [2021-11-20 06:09:10,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:09:10,936 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2021-11-20 06:09:10,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 10 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:09:10,936 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2021-11-20 06:09:10,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-20 06:09:10,937 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:09:10,937 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:09:10,949 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f88641-9473-4a1a-aa3d-edd940e60473/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-20 06:09:11,149 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f88641-9473-4a1a-aa3d-edd940e60473/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:09:11,149 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-20 06:09:11,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:09:11,150 INFO L85 PathProgramCache]: Analyzing trace with hash -1604227594, now seen corresponding path program 1 times [2021-11-20 06:09:11,150 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:09:11,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2118539340] [2021-11-20 06:09:11,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:09:11,150 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:09:11,151 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f88641-9473-4a1a-aa3d-edd940e60473/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:09:11,151 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f88641-9473-4a1a-aa3d-edd940e60473/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:09:11,153 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f88641-9473-4a1a-aa3d-edd940e60473/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-20 06:09:11,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:11,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-20 06:09:11,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:09:11,256 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:09:11,256 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:09:11,322 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:09:11,323 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:09:11,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2118539340] [2021-11-20 06:09:11,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2118539340] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 06:09:11,323 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:09:11,323 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-20 06:09:11,324 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192905843] [2021-11-20 06:09:11,324 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 06:09:11,324 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 06:09:11,324 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:09:11,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 06:09:11,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 06:09:11,325 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:09:11,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:09:11,490 INFO L93 Difference]: Finished difference Result 64 states and 71 transitions. [2021-11-20 06:09:11,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 06:09:11,492 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 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 14 [2021-11-20 06:09:11,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:09:11,493 INFO L225 Difference]: With dead ends: 64 [2021-11-20 06:09:11,493 INFO L226 Difference]: Without dead ends: 64 [2021-11-20 06:09:11,493 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-11-20 06:09:11,494 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 56 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:09:11,495 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 60 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:09:11,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-11-20 06:09:11,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 41. [2021-11-20 06:09:11,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 38 states have (on average 1.2105263157894737) internal successors, (46), 40 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:09:11,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 46 transitions. [2021-11-20 06:09:11,500 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 46 transitions. Word has length 14 [2021-11-20 06:09:11,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:09:11,501 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 46 transitions. [2021-11-20 06:09:11,501 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:09:11,501 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 46 transitions. [2021-11-20 06:09:11,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-20 06:09:11,502 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:09:11,502 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:09:11,519 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f88641-9473-4a1a-aa3d-edd940e60473/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-20 06:09:11,702 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f88641-9473-4a1a-aa3d-edd940e60473/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:09:11,703 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-20 06:09:11,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:09:11,703 INFO L85 PathProgramCache]: Analyzing trace with hash 265956368, now seen corresponding path program 1 times [2021-11-20 06:09:11,703 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:09:11,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [354230581] [2021-11-20 06:09:11,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:09:11,704 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:09:11,704 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f88641-9473-4a1a-aa3d-edd940e60473/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:09:11,708 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f88641-9473-4a1a-aa3d-edd940e60473/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:09:11,732 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f88641-9473-4a1a-aa3d-edd940e60473/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-20 06:09:11,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:11,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-20 06:09:11,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:09:11,857 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:09:11,858 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:09:11,956 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:09:11,956 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:09:11,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [354230581] [2021-11-20 06:09:11,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [354230581] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:09:11,957 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:09:11,957 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-11-20 06:09:11,957 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703054388] [2021-11-20 06:09:11,957 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:09:11,958 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 06:09:11,958 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:09:11,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 06:09:11,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-20 06:09:11,959 INFO L87 Difference]: Start difference. First operand 41 states and 46 transitions. Second operand has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:09:12,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:09:12,085 INFO L93 Difference]: Finished difference Result 55 states and 60 transitions. [2021-11-20 06:09:12,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 06:09:12,087 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 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 16 [2021-11-20 06:09:12,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:09:12,088 INFO L225 Difference]: With dead ends: 55 [2021-11-20 06:09:12,088 INFO L226 Difference]: Without dead ends: 55 [2021-11-20 06:09:12,088 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-11-20 06:09:12,089 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 47 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:09:12,089 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 68 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:09:12,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-11-20 06:09:12,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 51. [2021-11-20 06:09:12,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 48 states have (on average 1.1875) internal successors, (57), 50 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:09:12,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 57 transitions. [2021-11-20 06:09:12,095 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 57 transitions. Word has length 16 [2021-11-20 06:09:12,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:09:12,095 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 57 transitions. [2021-11-20 06:09:12,096 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:09:12,096 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 57 transitions. [2021-11-20 06:09:12,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-20 06:09:12,097 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:09:12,097 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:09:12,111 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f88641-9473-4a1a-aa3d-edd940e60473/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-20 06:09:12,298 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f88641-9473-4a1a-aa3d-edd940e60473/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:09:12,298 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-20 06:09:12,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:09:12,298 INFO L85 PathProgramCache]: Analyzing trace with hash -745160882, now seen corresponding path program 1 times [2021-11-20 06:09:12,299 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:09:12,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [90785474] [2021-11-20 06:09:12,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:09:12,299 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:09:12,299 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f88641-9473-4a1a-aa3d-edd940e60473/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:09:12,300 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f88641-9473-4a1a-aa3d-edd940e60473/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:09:12,304 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f88641-9473-4a1a-aa3d-edd940e60473/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-20 06:09:12,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:12,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-20 06:09:12,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:09:12,389 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 8 treesize of output 7 [2021-11-20 06:09:12,788 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:09:12,788 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:09:13,732 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:09:13,733 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:09:13,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [90785474] [2021-11-20 06:09:13,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [90785474] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:09:13,733 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:09:13,734 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-11-20 06:09:13,734 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517538288] [2021-11-20 06:09:13,734 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:09:13,734 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-20 06:09:13,735 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:09:13,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-20 06:09:13,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-11-20 06:09:13,736 INFO L87 Difference]: Start difference. First operand 51 states and 57 transitions. Second operand has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:09:14,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:09:14,719 INFO L93 Difference]: Finished difference Result 76 states and 86 transitions. [2021-11-20 06:09:14,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-20 06:09:14,721 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 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 16 [2021-11-20 06:09:14,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:09:14,722 INFO L225 Difference]: With dead ends: 76 [2021-11-20 06:09:14,722 INFO L226 Difference]: Without dead ends: 76 [2021-11-20 06:09:14,723 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2021-11-20 06:09:14,724 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 106 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 7 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-20 06:09:14,724 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 96 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 93 Invalid, 0 Unknown, 7 Unchecked, 0.5s Time] [2021-11-20 06:09:14,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-11-20 06:09:14,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 67. [2021-11-20 06:09:14,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 64 states have (on average 1.203125) internal successors, (77), 66 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:09:14,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 77 transitions. [2021-11-20 06:09:14,744 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 77 transitions. Word has length 16 [2021-11-20 06:09:14,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:09:14,745 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 77 transitions. [2021-11-20 06:09:14,745 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:09:14,745 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 77 transitions. [2021-11-20 06:09:14,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-20 06:09:14,746 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:09:14,746 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:09:14,762 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f88641-9473-4a1a-aa3d-edd940e60473/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-20 06:09:14,946 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f88641-9473-4a1a-aa3d-edd940e60473/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:09:14,947 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-20 06:09:14,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:09:14,947 INFO L85 PathProgramCache]: Analyzing trace with hash -2114005431, now seen corresponding path program 1 times [2021-11-20 06:09:14,947 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:09:14,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [678082642] [2021-11-20 06:09:14,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:09:14,948 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:09:14,948 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f88641-9473-4a1a-aa3d-edd940e60473/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:09:14,949 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f88641-9473-4a1a-aa3d-edd940e60473/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:09:14,961 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f88641-9473-4a1a-aa3d-edd940e60473/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-20 06:09:15,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:15,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-20 06:09:15,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:09:15,166 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 06:09:15,166 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:09:21,311 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 06:09:21,311 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:09:21,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [678082642] [2021-11-20 06:09:21,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [678082642] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 06:09:21,312 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:09:21,312 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-20 06:09:21,312 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72671912] [2021-11-20 06:09:21,312 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 06:09:21,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 06:09:21,313 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:09:21,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 06:09:21,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=24, Unknown=3, NotChecked=0, Total=42 [2021-11-20 06:09:21,314 INFO L87 Difference]: Start difference. First operand 67 states and 77 transitions. Second operand has 7 states, 6 states have (on average 5.833333333333333) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:09:21,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:09:21,378 INFO L93 Difference]: Finished difference Result 66 states and 76 transitions. [2021-11-20 06:09:21,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 06:09:21,379 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.833333333333333) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 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 18 [2021-11-20 06:09:21,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:09:21,380 INFO L225 Difference]: With dead ends: 66 [2021-11-20 06:09:21,380 INFO L226 Difference]: Without dead ends: 47 [2021-11-20 06:09:21,380 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=15, Invalid=24, Unknown=3, NotChecked=0, Total=42 [2021-11-20 06:09:21,381 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 15 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 8 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:09:21,382 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 53 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 8 Unchecked, 0.1s Time] [2021-11-20 06:09:21,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-11-20 06:09:21,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2021-11-20 06:09:21,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 45 states have (on average 1.1777777777777778) internal successors, (53), 46 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:09:21,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 53 transitions. [2021-11-20 06:09:21,387 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 53 transitions. Word has length 18 [2021-11-20 06:09:21,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:09:21,387 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 53 transitions. [2021-11-20 06:09:21,388 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.833333333333333) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:09:21,388 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 53 transitions. [2021-11-20 06:09:21,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-20 06:09:21,389 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:09:21,389 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1] [2021-11-20 06:09:21,400 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f88641-9473-4a1a-aa3d-edd940e60473/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-20 06:09:21,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f88641-9473-4a1a-aa3d-edd940e60473/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:09:21,595 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-20 06:09:21,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:09:21,596 INFO L85 PathProgramCache]: Analyzing trace with hash -1817992175, now seen corresponding path program 2 times [2021-11-20 06:09:21,596 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:09:21,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1100701772] [2021-11-20 06:09:21,596 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 06:09:21,596 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:09:21,597 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f88641-9473-4a1a-aa3d-edd940e60473/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:09:21,598 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f88641-9473-4a1a-aa3d-edd940e60473/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:09:21,603 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f88641-9473-4a1a-aa3d-edd940e60473/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-20 06:09:21,646 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 06:09:21,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:09:21,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-20 06:09:21,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:09:21,718 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 8 treesize of output 7 [2021-11-20 06:09:22,255 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:09:22,255 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:09:23,819 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:09:23,820 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:09:23,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1100701772] [2021-11-20 06:09:23,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1100701772] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:09:23,820 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:09:23,820 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-11-20 06:09:23,820 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513357286] [2021-11-20 06:09:23,821 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:09:23,821 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-20 06:09:23,821 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:09:23,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-20 06:09:23,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-11-20 06:09:23,822 INFO L87 Difference]: Start difference. First operand 47 states and 53 transitions. Second operand has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:09:26,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:09:26,762 INFO L93 Difference]: Finished difference Result 203 states and 228 transitions. [2021-11-20 06:09:26,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-20 06:09:26,763 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 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 18 [2021-11-20 06:09:26,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:09:26,765 INFO L225 Difference]: With dead ends: 203 [2021-11-20 06:09:26,765 INFO L226 Difference]: Without dead ends: 203 [2021-11-20 06:09:26,765 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=158, Invalid=348, Unknown=0, NotChecked=0, Total=506 [2021-11-20 06:09:26,766 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 254 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:09:26,766 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [254 Valid, 174 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 178 Invalid, 0 Unknown, 38 Unchecked, 1.1s Time] [2021-11-20 06:09:26,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-11-20 06:09:26,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 63. [2021-11-20 06:09:26,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 61 states have (on average 1.1967213114754098) internal successors, (73), 62 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:09:26,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 73 transitions. [2021-11-20 06:09:26,774 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 73 transitions. Word has length 18 [2021-11-20 06:09:26,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:09:26,774 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 73 transitions. [2021-11-20 06:09:26,775 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:09:26,775 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 73 transitions. [2021-11-20 06:09:26,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-20 06:09:26,776 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:09:26,776 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:09:26,796 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f88641-9473-4a1a-aa3d-edd940e60473/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-20 06:09:26,988 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f88641-9473-4a1a-aa3d-edd940e60473/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:09:26,988 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-20 06:09:26,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:09:26,989 INFO L85 PathProgramCache]: Analyzing trace with hash 861855476, now seen corresponding path program 2 times [2021-11-20 06:09:26,989 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:09:26,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1068955486] [2021-11-20 06:09:26,990 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 06:09:26,990 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:09:26,990 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f88641-9473-4a1a-aa3d-edd940e60473/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:09:26,991 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f88641-9473-4a1a-aa3d-edd940e60473/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:09:26,995 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f88641-9473-4a1a-aa3d-edd940e60473/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-20 06:09:27,049 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 06:09:27,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:09:27,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-20 06:09:27,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:09:27,089 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 8 treesize of output 7 [2021-11-20 06:09:27,536 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 06:09:27,536 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:09:29,704 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:09:29,704 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:09:29,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1068955486] [2021-11-20 06:09:29,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1068955486] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:09:29,704 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:09:29,704 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 17 [2021-11-20 06:09:29,704 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731733713] [2021-11-20 06:09:29,705 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:09:29,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-20 06:09:29,705 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:09:29,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-20 06:09:29,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-11-20 06:09:29,706 INFO L87 Difference]: Start difference. First operand 63 states and 73 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:09:30,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:09:30,600 INFO L93 Difference]: Finished difference Result 74 states and 84 transitions. [2021-11-20 06:09:30,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-20 06:09:30,602 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 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 24 [2021-11-20 06:09:30,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:09:30,604 INFO L225 Difference]: With dead ends: 74 [2021-11-20 06:09:30,604 INFO L226 Difference]: Without dead ends: 71 [2021-11-20 06:09:30,605 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-11-20 06:09:30,605 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 43 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 5 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-20 06:09:30,606 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 75 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 88 Invalid, 0 Unknown, 5 Unchecked, 0.7s Time] [2021-11-20 06:09:30,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-11-20 06:09:30,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 67. [2021-11-20 06:09:30,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 65 states have (on average 1.1846153846153846) internal successors, (77), 66 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:09:30,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 77 transitions. [2021-11-20 06:09:30,613 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 77 transitions. Word has length 24 [2021-11-20 06:09:30,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:09:30,613 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 77 transitions. [2021-11-20 06:09:30,614 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:09:30,614 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 77 transitions. [2021-11-20 06:09:30,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-20 06:09:30,615 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:09:30,615 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:09:30,644 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f88641-9473-4a1a-aa3d-edd940e60473/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-20 06:09:30,828 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f88641-9473-4a1a-aa3d-edd940e60473/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:09:30,828 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-20 06:09:30,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:09:30,829 INFO L85 PathProgramCache]: Analyzing trace with hash 1755727223, now seen corresponding path program 3 times [2021-11-20 06:09:30,829 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:09:30,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1690361949] [2021-11-20 06:09:30,829 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 06:09:30,829 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:09:30,829 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f88641-9473-4a1a-aa3d-edd940e60473/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:09:30,830 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f88641-9473-4a1a-aa3d-edd940e60473/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:09:30,831 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f88641-9473-4a1a-aa3d-edd940e60473/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-20 06:09:30,952 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-20 06:09:30,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:09:30,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-20 06:09:30,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:09:30,978 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 8 treesize of output 7 [2021-11-20 06:09:31,849 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:09:31,850 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:09:34,625 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:09:34,625 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:09:34,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1690361949] [2021-11-20 06:09:34,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1690361949] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:09:34,625 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:09:34,625 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 22 [2021-11-20 06:09:34,625 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362015184] [2021-11-20 06:09:34,625 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:09:34,626 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-20 06:09:34,626 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:09:34,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-20 06:09:34,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2021-11-20 06:09:34,627 INFO L87 Difference]: Start difference. First operand 67 states and 77 transitions. Second operand has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:09:42,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:09:42,243 INFO L93 Difference]: Finished difference Result 132 states and 148 transitions. [2021-11-20 06:09:42,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-20 06:09:42,244 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-11-20 06:09:42,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:09:42,245 INFO L225 Difference]: With dead ends: 132 [2021-11-20 06:09:42,245 INFO L226 Difference]: Without dead ends: 114 [2021-11-20 06:09:42,246 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=446, Invalid=1360, Unknown=0, NotChecked=0, Total=1806 [2021-11-20 06:09:42,247 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 538 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 310 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 538 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-11-20 06:09:42,247 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [538 Valid, 163 Invalid, 373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 310 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-11-20 06:09:42,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-11-20 06:09:42,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 75. [2021-11-20 06:09:42,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 73 states have (on average 1.1643835616438356) internal successors, (85), 74 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:09:42,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 85 transitions. [2021-11-20 06:09:42,253 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 85 transitions. Word has length 28 [2021-11-20 06:09:42,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:09:42,254 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 85 transitions. [2021-11-20 06:09:42,254 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:09:42,254 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 85 transitions. [2021-11-20 06:09:42,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-20 06:09:42,256 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:09:42,256 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 1, 1, 1, 1, 1] [2021-11-20 06:09:42,284 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f88641-9473-4a1a-aa3d-edd940e60473/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (14)] Ended with exit code 0 [2021-11-20 06:09:42,469 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f88641-9473-4a1a-aa3d-edd940e60473/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:09:42,470 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-20 06:09:42,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:09:42,470 INFO L85 PathProgramCache]: Analyzing trace with hash -563143139, now seen corresponding path program 3 times [2021-11-20 06:09:42,471 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:09:42,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1120960728] [2021-11-20 06:09:42,471 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 06:09:42,471 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:09:42,471 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f88641-9473-4a1a-aa3d-edd940e60473/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:09:42,472 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f88641-9473-4a1a-aa3d-edd940e60473/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:09:42,487 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f88641-9473-4a1a-aa3d-edd940e60473/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-20 06:09:42,642 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-20 06:09:42,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:09:42,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-20 06:09:42,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:09:42,692 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 8 treesize of output 7 [2021-11-20 06:09:43,615 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:09:43,615 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:09:46,255 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:09:46,256 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:09:46,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1120960728] [2021-11-20 06:09:46,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1120960728] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:09:46,256 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:09:46,256 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-11-20 06:09:46,256 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037173764] [2021-11-20 06:09:46,256 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:09:46,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-20 06:09:46,257 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:09:46,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-20 06:09:46,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=336, Unknown=0, NotChecked=0, Total=462 [2021-11-20 06:09:46,258 INFO L87 Difference]: Start difference. First operand 75 states and 85 transitions. Second operand has 22 states, 21 states have (on average 3.142857142857143) internal successors, (66), 22 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:10:01,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:10:01,007 INFO L93 Difference]: Finished difference Result 537 states and 603 transitions. [2021-11-20 06:10:01,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-20 06:10:01,009 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 3.142857142857143) internal successors, (66), 22 states have internal predecessors, (66), 0 states have call successors, (0), 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 34 [2021-11-20 06:10:01,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:10:01,013 INFO L225 Difference]: With dead ends: 537 [2021-11-20 06:10:01,013 INFO L226 Difference]: Without dead ends: 537 [2021-11-20 06:10:01,015 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 538 ImplicationChecksByTransitivity, 13.8s TimeCoverageRelationStatistics Valid=576, Invalid=1316, Unknown=0, NotChecked=0, Total=1892 [2021-11-20 06:10:01,015 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 867 mSDsluCounter, 457 mSDsCounter, 0 mSdLazyCounter, 578 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 867 SdHoareTripleChecker+Valid, 504 SdHoareTripleChecker+Invalid, 685 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 578 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 77 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-11-20 06:10:01,016 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [867 Valid, 504 Invalid, 685 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 578 Invalid, 0 Unknown, 77 Unchecked, 2.8s Time] [2021-11-20 06:10:01,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 537 states. [2021-11-20 06:10:01,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 537 to 107. [2021-11-20 06:10:01,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 105 states have (on average 1.1904761904761905) internal successors, (125), 106 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:10:01,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 125 transitions. [2021-11-20 06:10:01,028 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 125 transitions. Word has length 34 [2021-11-20 06:10:01,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:10:01,028 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 125 transitions. [2021-11-20 06:10:01,029 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 3.142857142857143) internal successors, (66), 22 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:10:01,029 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 125 transitions. [2021-11-20 06:10:01,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-20 06:10:01,031 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:10:01,031 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:10:01,044 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f88641-9473-4a1a-aa3d-edd940e60473/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-20 06:10:01,243 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f88641-9473-4a1a-aa3d-edd940e60473/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:10:01,244 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-20 06:10:01,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:10:01,244 INFO L85 PathProgramCache]: Analyzing trace with hash 195132954, now seen corresponding path program 1 times [2021-11-20 06:10:01,245 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:10:01,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1643649901] [2021-11-20 06:10:01,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:10:01,245 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:10:01,245 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f88641-9473-4a1a-aa3d-edd940e60473/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:10:01,249 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f88641-9473-4a1a-aa3d-edd940e60473/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:10:01,250 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f88641-9473-4a1a-aa3d-edd940e60473/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-20 06:10:01,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:10:01,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-20 06:10:01,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:10:01,354 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 8 treesize of output 7 [2021-11-20 06:10:02,237 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 16 proven. 24 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 06:10:02,238 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:10:05,336 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 06:10:05,336 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:10:05,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1643649901] [2021-11-20 06:10:05,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1643649901] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:10:05,336 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:10:05,336 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-11-20 06:10:05,336 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183997782] [2021-11-20 06:10:05,337 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:10:05,337 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-20 06:10:05,337 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:10:05,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-20 06:10:05,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-11-20 06:10:05,338 INFO L87 Difference]: Start difference. First operand 107 states and 125 transitions. Second operand has 20 states, 20 states have (on average 3.2) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:10:06,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:10:06,844 INFO L93 Difference]: Finished difference Result 142 states and 164 transitions. [2021-11-20 06:10:06,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-20 06:10:06,846 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 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 34 [2021-11-20 06:10:06,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:10:06,848 INFO L225 Difference]: With dead ends: 142 [2021-11-20 06:10:06,848 INFO L226 Difference]: Without dead ends: 129 [2021-11-20 06:10:06,848 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2021-11-20 06:10:06,849 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 62 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 15 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-20 06:10:06,850 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 115 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 95 Invalid, 0 Unknown, 15 Unchecked, 0.7s Time] [2021-11-20 06:10:06,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-11-20 06:10:06,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 123. [2021-11-20 06:10:06,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 121 states have (on average 1.1900826446280992) internal successors, (144), 122 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:10:06,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 144 transitions. [2021-11-20 06:10:06,856 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 144 transitions. Word has length 34 [2021-11-20 06:10:06,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:10:06,857 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 144 transitions. [2021-11-20 06:10:06,857 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:10:06,857 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 144 transitions. [2021-11-20 06:10:06,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-20 06:10:06,859 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:10:06,859 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:10:06,870 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f88641-9473-4a1a-aa3d-edd940e60473/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-20 06:10:07,067 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f88641-9473-4a1a-aa3d-edd940e60473/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:10:07,068 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-20 06:10:07,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:10:07,068 INFO L85 PathProgramCache]: Analyzing trace with hash 1584580368, now seen corresponding path program 4 times [2021-11-20 06:10:07,068 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:10:07,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1524494162] [2021-11-20 06:10:07,069 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 06:10:07,069 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:10:07,069 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f88641-9473-4a1a-aa3d-edd940e60473/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:10:07,071 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f88641-9473-4a1a-aa3d-edd940e60473/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:10:07,072 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f88641-9473-4a1a-aa3d-edd940e60473/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-20 06:10:07,209 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 06:10:07,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:10:07,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-20 06:10:07,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:10:07,254 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 8 treesize of output 7 [2021-11-20 06:10:08,088 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-20 06:10:08,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:10:10,911 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-20 06:10:10,911 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:10:10,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1524494162] [2021-11-20 06:10:10,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1524494162] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:10:10,912 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:10:10,912 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-11-20 06:10:10,912 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996211496] [2021-11-20 06:10:10,912 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:10:10,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-20 06:10:10,912 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:10:10,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-20 06:10:10,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2021-11-20 06:10:10,913 INFO L87 Difference]: Start difference. First operand 123 states and 144 transitions. Second operand has 20 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 20 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:10:18,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:10:18,428 INFO L93 Difference]: Finished difference Result 174 states and 201 transitions. [2021-11-20 06:10:18,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-20 06:10:18,430 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 20 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-11-20 06:10:18,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:10:18,431 INFO L225 Difference]: With dead ends: 174 [2021-11-20 06:10:18,432 INFO L226 Difference]: Without dead ends: 174 [2021-11-20 06:10:18,432 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=384, Invalid=1022, Unknown=0, NotChecked=0, Total=1406 [2021-11-20 06:10:18,433 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 279 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2021-11-20 06:10:18,433 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [279 Valid, 193 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 238 Invalid, 0 Unknown, 38 Unchecked, 3.4s Time] [2021-11-20 06:10:18,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-11-20 06:10:18,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 143. [2021-11-20 06:10:18,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 141 states have (on average 1.1702127659574468) internal successors, (165), 142 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:10:18,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 165 transitions. [2021-11-20 06:10:18,439 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 165 transitions. Word has length 40 [2021-11-20 06:10:18,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:10:18,440 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 165 transitions. [2021-11-20 06:10:18,440 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 20 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:10:18,440 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 165 transitions. [2021-11-20 06:10:18,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-20 06:10:18,443 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:10:18,443 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:10:18,456 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f88641-9473-4a1a-aa3d-edd940e60473/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-20 06:10:18,655 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f88641-9473-4a1a-aa3d-edd940e60473/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:10:18,656 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-20 06:10:18,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:10:18,656 INFO L85 PathProgramCache]: Analyzing trace with hash -1667679380, now seen corresponding path program 5 times [2021-11-20 06:10:18,657 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:10:18,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1878844715] [2021-11-20 06:10:18,657 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-20 06:10:18,657 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:10:18,658 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f88641-9473-4a1a-aa3d-edd940e60473/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:10:18,659 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f88641-9473-4a1a-aa3d-edd940e60473/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:10:18,671 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f88641-9473-4a1a-aa3d-edd940e60473/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-20 06:10:18,963 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-11-20 06:10:18,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:10:18,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-20 06:10:18,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:10:18,999 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 8 treesize of output 7 [2021-11-20 06:10:20,563 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 60 proven. 113 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 06:10:20,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:10:27,056 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 0 proven. 177 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:10:27,056 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:10:27,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1878844715] [2021-11-20 06:10:27,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1878844715] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:10:27,056 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:10:27,056 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 34 [2021-11-20 06:10:27,056 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140019055] [2021-11-20 06:10:27,057 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:10:27,057 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-20 06:10:27,057 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:10:27,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-20 06:10:27,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=952, Unknown=0, NotChecked=0, Total=1122 [2021-11-20 06:10:27,058 INFO L87 Difference]: Start difference. First operand 143 states and 165 transitions. Second operand has 34 states, 34 states have (on average 3.1470588235294117) internal successors, (107), 34 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:10:30,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:10:30,800 INFO L93 Difference]: Finished difference Result 218 states and 251 transitions. [2021-11-20 06:10:30,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-20 06:10:30,802 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.1470588235294117) internal successors, (107), 34 states have internal predecessors, (107), 0 states have call successors, (0), 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 56 [2021-11-20 06:10:30,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:10:30,803 INFO L225 Difference]: With dead ends: 218 [2021-11-20 06:10:30,803 INFO L226 Difference]: Without dead ends: 215 [2021-11-20 06:10:30,804 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=329, Invalid=1563, Unknown=0, NotChecked=0, Total=1892 [2021-11-20 06:10:30,805 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 113 mSDsluCounter, 343 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-20 06:10:30,805 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 364 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 202 Invalid, 0 Unknown, 41 Unchecked, 0.7s Time] [2021-11-20 06:10:30,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2021-11-20 06:10:30,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 191. [2021-11-20 06:10:30,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 189 states have (on average 1.1851851851851851) internal successors, (224), 190 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:10:30,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 224 transitions. [2021-11-20 06:10:30,811 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 224 transitions. Word has length 56 [2021-11-20 06:10:30,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:10:30,811 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 224 transitions. [2021-11-20 06:10:30,812 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.1470588235294117) internal successors, (107), 34 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:10:30,812 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 224 transitions. [2021-11-20 06:10:30,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-20 06:10:30,814 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:10:30,814 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:10:30,829 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f88641-9473-4a1a-aa3d-edd940e60473/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (18)] Ended with exit code 0 [2021-11-20 06:10:31,025 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f88641-9473-4a1a-aa3d-edd940e60473/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:10:31,026 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-20 06:10:31,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:10:31,026 INFO L85 PathProgramCache]: Analyzing trace with hash 351369087, now seen corresponding path program 2 times [2021-11-20 06:10:31,027 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:10:31,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [39362252] [2021-11-20 06:10:31,027 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 06:10:31,027 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:10:31,027 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f88641-9473-4a1a-aa3d-edd940e60473/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:10:31,028 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f88641-9473-4a1a-aa3d-edd940e60473/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:10:31,028 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f88641-9473-4a1a-aa3d-edd940e60473/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-20 06:10:31,122 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 06:10:31,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:10:31,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-20 06:10:31,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:10:31,151 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 8 treesize of output 7 [2021-11-20 06:10:32,298 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 64 proven. 126 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 06:10:32,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:10:38,799 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 194 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 06:10:38,799 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:10:38,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [39362252] [2021-11-20 06:10:38,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [39362252] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:10:38,799 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:10:38,800 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 33 [2021-11-20 06:10:38,800 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927460441] [2021-11-20 06:10:38,800 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:10:38,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-20 06:10:38,801 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:10:38,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-20 06:10:38,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=900, Unknown=0, NotChecked=0, Total=1056 [2021-11-20 06:10:38,802 INFO L87 Difference]: Start difference. First operand 191 states and 224 transitions. Second operand has 33 states, 33 states have (on average 3.5454545454545454) internal successors, (117), 33 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:10:46,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:10:46,158 INFO L93 Difference]: Finished difference Result 404 states and 467 transitions. [2021-11-20 06:10:46,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-20 06:10:46,160 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.5454545454545454) internal successors, (117), 33 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-11-20 06:10:46,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:10:46,162 INFO L225 Difference]: With dead ends: 404 [2021-11-20 06:10:46,162 INFO L226 Difference]: Without dead ends: 388 [2021-11-20 06:10:46,163 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 93 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=263, Invalid=1629, Unknown=0, NotChecked=0, Total=1892 [2021-11-20 06:10:46,164 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 139 mSDsluCounter, 500 mSDsCounter, 0 mSdLazyCounter, 503 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 531 SdHoareTripleChecker+Invalid, 602 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 71 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2021-11-20 06:10:46,164 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 531 Invalid, 602 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 503 Invalid, 0 Unknown, 71 Unchecked, 3.8s Time] [2021-11-20 06:10:46,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2021-11-20 06:10:46,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 183. [2021-11-20 06:10:46,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 181 states have (on average 1.1767955801104972) internal successors, (213), 182 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:10:46,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 213 transitions. [2021-11-20 06:10:46,171 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 213 transitions. Word has length 62 [2021-11-20 06:10:46,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:10:46,171 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 213 transitions. [2021-11-20 06:10:46,172 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.5454545454545454) internal successors, (117), 33 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:10:46,172 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 213 transitions. [2021-11-20 06:10:46,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-20 06:10:46,173 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:10:46,173 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:10:46,190 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f88641-9473-4a1a-aa3d-edd940e60473/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-20 06:10:46,385 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f88641-9473-4a1a-aa3d-edd940e60473/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:10:46,385 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-20 06:10:46,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:10:46,386 INFO L85 PathProgramCache]: Analyzing trace with hash 1669066815, now seen corresponding path program 3 times [2021-11-20 06:10:46,386 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:10:46,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [195955533] [2021-11-20 06:10:46,386 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 06:10:46,386 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:10:46,386 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f88641-9473-4a1a-aa3d-edd940e60473/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:10:46,387 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f88641-9473-4a1a-aa3d-edd940e60473/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:10:46,397 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f88641-9473-4a1a-aa3d-edd940e60473/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-20 06:10:46,586 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-11-20 06:10:46,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:10:46,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-20 06:10:46,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:10:46,621 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 8 treesize of output 7 [2021-11-20 06:10:48,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 41 treesize of output 33 [2021-11-20 06:10:48,585 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 120 proven. 15 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2021-11-20 06:10:48,585 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:10:57,581 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 48 proven. 87 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2021-11-20 06:10:57,581 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:10:57,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [195955533] [2021-11-20 06:10:57,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [195955533] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:10:57,581 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:10:57,581 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-11-20 06:10:57,581 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859723856] [2021-11-20 06:10:57,581 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:10:57,582 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-20 06:10:57,582 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:10:57,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-20 06:10:57,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=619, Unknown=0, NotChecked=0, Total=756 [2021-11-20 06:10:57,583 INFO L87 Difference]: Start difference. First operand 183 states and 213 transitions. Second operand has 28 states, 28 states have (on average 2.9285714285714284) internal successors, (82), 28 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:10:57,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:10:57,817 INFO L93 Difference]: Finished difference Result 339 states and 389 transitions. [2021-11-20 06:10:57,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-20 06:10:57,818 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.9285714285714284) internal successors, (82), 28 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-11-20 06:10:57,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:10:57,820 INFO L225 Difference]: With dead ends: 339 [2021-11-20 06:10:57,820 INFO L226 Difference]: Without dead ends: 321 [2021-11-20 06:10:57,820 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=148, Invalid=664, Unknown=0, NotChecked=0, Total=812 [2021-11-20 06:10:57,821 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 44 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 115 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:10:57,821 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 195 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 59 Invalid, 0 Unknown, 115 Unchecked, 0.1s Time] [2021-11-20 06:10:57,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2021-11-20 06:10:57,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 306. [2021-11-20 06:10:57,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 304 states have (on average 1.1710526315789473) internal successors, (356), 305 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:10:57,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 356 transitions. [2021-11-20 06:10:57,831 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 356 transitions. Word has length 62 [2021-11-20 06:10:57,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:10:57,831 INFO L470 AbstractCegarLoop]: Abstraction has 306 states and 356 transitions. [2021-11-20 06:10:57,831 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.9285714285714284) internal successors, (82), 28 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:10:57,832 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 356 transitions. [2021-11-20 06:10:57,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-20 06:10:57,833 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:10:57,833 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:10:57,844 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f88641-9473-4a1a-aa3d-edd940e60473/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-20 06:10:58,043 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f88641-9473-4a1a-aa3d-edd940e60473/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:10:58,044 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-20 06:10:58,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:10:58,044 INFO L85 PathProgramCache]: Analyzing trace with hash 945581570, now seen corresponding path program 6 times [2021-11-20 06:10:58,044 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:10:58,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [245820708] [2021-11-20 06:10:58,045 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-20 06:10:58,045 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:10:58,045 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f88641-9473-4a1a-aa3d-edd940e60473/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:10:58,045 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f88641-9473-4a1a-aa3d-edd940e60473/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:10:58,048 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f88641-9473-4a1a-aa3d-edd940e60473/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-20 06:10:58,237 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-11-20 06:10:58,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:10:58,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-20 06:10:58,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:10:58,276 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 8 treesize of output 7 [2021-11-20 06:10:59,499 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 110 proven. 78 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-20 06:10:59,499 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:11:03,764 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 118 proven. 70 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-20 06:11:03,764 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:11:03,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [245820708] [2021-11-20 06:11:03,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [245820708] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:11:03,764 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:11:03,764 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 31 [2021-11-20 06:11:03,764 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9441178] [2021-11-20 06:11:03,765 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:11:03,765 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-20 06:11:03,765 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:11:03,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-20 06:11:03,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=778, Unknown=0, NotChecked=0, Total=930 [2021-11-20 06:11:03,766 INFO L87 Difference]: Start difference. First operand 306 states and 356 transitions. Second operand has 31 states, 31 states have (on average 2.935483870967742) internal successors, (91), 31 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:11:23,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:11:23,263 INFO L93 Difference]: Finished difference Result 434 states and 497 transitions. [2021-11-20 06:11:23,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-20 06:11:23,265 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.935483870967742) internal successors, (91), 31 states have internal predecessors, (91), 0 states have call successors, (0), 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 [2021-11-20 06:11:23,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:11:23,267 INFO L225 Difference]: With dead ends: 434 [2021-11-20 06:11:23,267 INFO L226 Difference]: Without dead ends: 290 [2021-11-20 06:11:23,268 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 101 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 374 ImplicationChecksByTransitivity, 14.7s TimeCoverageRelationStatistics Valid=337, Invalid=1825, Unknown=0, NotChecked=0, Total=2162 [2021-11-20 06:11:23,268 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 265 mSDsluCounter, 538 mSDsCounter, 0 mSdLazyCounter, 598 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 579 SdHoareTripleChecker+Invalid, 735 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 598 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 109 IncrementalHoareTripleChecker+Unchecked, 7.9s IncrementalHoareTripleChecker+Time [2021-11-20 06:11:23,269 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [265 Valid, 579 Invalid, 735 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 598 Invalid, 0 Unknown, 109 Unchecked, 7.9s Time] [2021-11-20 06:11:23,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2021-11-20 06:11:23,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 191. [2021-11-20 06:11:23,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 189 states have (on average 1.1693121693121693) internal successors, (221), 190 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:11:23,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 221 transitions. [2021-11-20 06:11:23,275 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 221 transitions. Word has length 64 [2021-11-20 06:11:23,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:11:23,275 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 221 transitions. [2021-11-20 06:11:23,276 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.935483870967742) internal successors, (91), 31 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:11:23,276 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 221 transitions. [2021-11-20 06:11:23,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-20 06:11:23,277 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:11:23,277 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 1, 1, 1, 1, 1] [2021-11-20 06:11:23,295 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f88641-9473-4a1a-aa3d-edd940e60473/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-20 06:11:23,489 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f88641-9473-4a1a-aa3d-edd940e60473/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:11:23,490 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-20 06:11:23,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:11:23,490 INFO L85 PathProgramCache]: Analyzing trace with hash 58542645, now seen corresponding path program 4 times [2021-11-20 06:11:23,490 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:11:23,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [802084435] [2021-11-20 06:11:23,491 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 06:11:23,491 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:11:23,491 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f88641-9473-4a1a-aa3d-edd940e60473/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:11:23,492 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f88641-9473-4a1a-aa3d-edd940e60473/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:11:23,493 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f88641-9473-4a1a-aa3d-edd940e60473/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-20 06:11:23,568 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 06:11:23,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:11:23,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-20 06:11:23,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:11:23,595 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 8 treesize of output 7 [2021-11-20 06:11:25,559 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 0 proven. 450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:11:25,559 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:11:36,801 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 0 proven. 450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:11:36,801 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:11:36,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [802084435] [2021-11-20 06:11:36,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [802084435] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:11:36,801 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:11:36,801 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 45 [2021-11-20 06:11:36,802 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168283680] [2021-11-20 06:11:36,802 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:11:36,802 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-11-20 06:11:36,802 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:11:36,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-11-20 06:11:36,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=545, Invalid=1525, Unknown=0, NotChecked=0, Total=2070 [2021-11-20 06:11:36,803 INFO L87 Difference]: Start difference. First operand 191 states and 221 transitions. Second operand has 46 states, 45 states have (on average 2.888888888888889) internal successors, (130), 46 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:11:53,231 WARN L227 SmtUtils]: Spent 12.17s on a formula simplification that was a NOOP. DAG size: 171 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 06:11:55,358 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:11:57,373 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:11:59,376 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:12:00,529 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:12:11,776 WARN L227 SmtUtils]: Spent 10.68s on a formula simplification that was a NOOP. DAG size: 168 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 06:12:33,070 WARN L227 SmtUtils]: Spent 20.27s on a formula simplification. DAG size of input: 163 DAG size of output: 163 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 06:12:35,711 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:12:37,781 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:12:39,784 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:12:41,382 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.55s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:12:50,505 WARN L227 SmtUtils]: Spent 8.38s on a formula simplification that was a NOOP. DAG size: 157 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 06:13:05,639 WARN L227 SmtUtils]: Spent 14.18s on a formula simplification. DAG size of input: 152 DAG size of output: 152 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 06:13:13,566 WARN L227 SmtUtils]: Spent 6.68s on a formula simplification that was a NOOP. DAG size: 146 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 06:13:28,339 WARN L227 SmtUtils]: Spent 13.28s on a formula simplification. DAG size of input: 141 DAG size of output: 141 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 06:13:34,914 WARN L227 SmtUtils]: Spent 5.55s on a formula simplification that was a NOOP. DAG size: 136 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 06:13:45,316 WARN L227 SmtUtils]: Spent 9.30s on a formula simplification. DAG size of input: 131 DAG size of output: 131 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 06:14:00,761 WARN L227 SmtUtils]: Spent 8.44s on a formula simplification. DAG size of input: 120 DAG size of output: 120 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 06:14:11,927 WARN L227 SmtUtils]: Spent 5.33s on a formula simplification. DAG size of input: 109 DAG size of output: 109 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 06:14:14,092 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:14:16,095 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:14:18,098 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:14:49,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:14:49,903 INFO L93 Difference]: Finished difference Result 2203 states and 2486 transitions. [2021-11-20 06:14:49,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-11-20 06:14:49,904 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 2.888888888888889) internal successors, (130), 46 states have internal predecessors, (130), 0 states have call successors, (0), 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 [2021-11-20 06:14:49,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:14:49,914 INFO L225 Difference]: With dead ends: 2203 [2021-11-20 06:14:49,914 INFO L226 Difference]: Without dead ends: 2203 [2021-11-20 06:14:49,917 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2441 ImplicationChecksByTransitivity, 168.7s TimeCoverageRelationStatistics Valid=2223, Invalid=5259, Unknown=0, NotChecked=0, Total=7482 [2021-11-20 06:14:49,917 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 3992 mSDsluCounter, 1769 mSDsCounter, 0 mSdLazyCounter, 2461 mSolverCounterSat, 175 mSolverCounterUnsat, 9 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 31.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3992 SdHoareTripleChecker+Valid, 1854 SdHoareTripleChecker+Invalid, 2792 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 2461 IncrementalHoareTripleChecker+Invalid, 9 IncrementalHoareTripleChecker+Unknown, 147 IncrementalHoareTripleChecker+Unchecked, 32.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:14:49,918 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3992 Valid, 1854 Invalid, 2792 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 2461 Invalid, 9 Unknown, 147 Unchecked, 32.3s Time] [2021-11-20 06:14:49,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2203 states. [2021-11-20 06:14:49,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2203 to 255. [2021-11-20 06:14:49,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 253 states have (on average 1.1897233201581028) internal successors, (301), 254 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:14:49,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 301 transitions. [2021-11-20 06:14:49,936 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 301 transitions. Word has length 66 [2021-11-20 06:14:49,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:14:49,937 INFO L470 AbstractCegarLoop]: Abstraction has 255 states and 301 transitions. [2021-11-20 06:14:49,937 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 2.888888888888889) internal successors, (130), 46 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:14:49,942 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 301 transitions. [2021-11-20 06:14:49,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-20 06:14:49,943 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:14:49,943 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:14:49,966 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f88641-9473-4a1a-aa3d-edd940e60473/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-20 06:14:50,155 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f88641-9473-4a1a-aa3d-edd940e60473/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:14:50,156 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-20 06:14:50,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:14:50,156 INFO L85 PathProgramCache]: Analyzing trace with hash 1221987074, now seen corresponding path program 4 times [2021-11-20 06:14:50,157 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:14:50,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [33707274] [2021-11-20 06:14:50,157 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 06:14:50,157 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:14:50,157 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f88641-9473-4a1a-aa3d-edd940e60473/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:14:50,158 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f88641-9473-4a1a-aa3d-edd940e60473/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:14:50,159 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f88641-9473-4a1a-aa3d-edd940e60473/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-20 06:14:50,251 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 06:14:50,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:14:50,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-20 06:14:50,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:14:50,283 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 8 treesize of output 7 [2021-11-20 06:14:51,913 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 64 proven. 139 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 06:14:51,913 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:14:59,669 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 0 proven. 207 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 06:14:59,670 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:14:59,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [33707274] [2021-11-20 06:14:59,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [33707274] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:14:59,670 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:14:59,670 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 19] total 35 [2021-11-20 06:14:59,670 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805096385] [2021-11-20 06:14:59,670 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:14:59,671 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-11-20 06:14:59,671 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:14:59,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-11-20 06:14:59,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=1022, Unknown=0, NotChecked=0, Total=1190 [2021-11-20 06:14:59,672 INFO L87 Difference]: Start difference. First operand 255 states and 301 transitions. Second operand has 35 states, 35 states have (on average 3.5714285714285716) internal successors, (125), 35 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:15:03,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:15:03,725 INFO L93 Difference]: Finished difference Result 509 states and 594 transitions. [2021-11-20 06:15:03,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-20 06:15:03,728 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 3.5714285714285716) internal successors, (125), 35 states have internal predecessors, (125), 0 states have call successors, (0), 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 [2021-11-20 06:15:03,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:15:03,730 INFO L225 Difference]: With dead ends: 509 [2021-11-20 06:15:03,730 INFO L226 Difference]: Without dead ends: 493 [2021-11-20 06:15:03,731 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 98 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=253, Invalid=1553, Unknown=0, NotChecked=0, Total=1806 [2021-11-20 06:15:03,731 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 132 mSDsluCounter, 565 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 597 SdHoareTripleChecker+Invalid, 395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 55 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-20 06:15:03,732 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 597 Invalid, 395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 304 Invalid, 0 Unknown, 55 Unchecked, 1.4s Time] [2021-11-20 06:15:03,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2021-11-20 06:15:03,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 279. [2021-11-20 06:15:03,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 277 states have (on average 1.1949458483754514) internal successors, (331), 278 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:15:03,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 331 transitions. [2021-11-20 06:15:03,754 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 331 transitions. Word has length 66 [2021-11-20 06:15:03,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:15:03,755 INFO L470 AbstractCegarLoop]: Abstraction has 279 states and 331 transitions. [2021-11-20 06:15:03,755 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 3.5714285714285716) internal successors, (125), 35 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:15:03,755 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 331 transitions. [2021-11-20 06:15:03,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-20 06:15:03,756 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:15:03,756 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:15:03,773 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f88641-9473-4a1a-aa3d-edd940e60473/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-20 06:15:03,969 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f88641-9473-4a1a-aa3d-edd940e60473/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:15:03,969 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-20 06:15:03,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:15:03,970 INFO L85 PathProgramCache]: Analyzing trace with hash -1450877822, now seen corresponding path program 5 times [2021-11-20 06:15:03,970 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:15:03,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [59858737] [2021-11-20 06:15:03,970 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-20 06:15:03,970 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:15:03,970 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f88641-9473-4a1a-aa3d-edd940e60473/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:15:03,971 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f88641-9473-4a1a-aa3d-edd940e60473/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:15:03,973 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f88641-9473-4a1a-aa3d-edd940e60473/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-20 06:15:04,264 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-11-20 06:15:04,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:15:04,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-20 06:15:04,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:15:04,294 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 8 treesize of output 7 [2021-11-20 06:15:06,102 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 64 proven. 139 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 06:15:06,103 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:15:15,891 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 0 proven. 207 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 06:15:15,891 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:15:15,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [59858737] [2021-11-20 06:15:15,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [59858737] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:15:15,892 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:15:15,892 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 20] total 37 [2021-11-20 06:15:15,892 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296428810] [2021-11-20 06:15:15,892 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:15:15,892 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-20 06:15:15,892 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:15:15,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-20 06:15:15,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=1144, Unknown=0, NotChecked=0, Total=1332 [2021-11-20 06:15:15,893 INFO L87 Difference]: Start difference. First operand 279 states and 331 transitions. Second operand has 37 states, 37 states have (on average 3.3783783783783785) internal successors, (125), 37 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:15:26,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:15:26,705 INFO L93 Difference]: Finished difference Result 509 states and 600 transitions. [2021-11-20 06:15:26,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-11-20 06:15:26,708 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 3.3783783783783785) internal successors, (125), 37 states have internal predecessors, (125), 0 states have call successors, (0), 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 [2021-11-20 06:15:26,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:15:26,710 INFO L225 Difference]: With dead ends: 509 [2021-11-20 06:15:26,710 INFO L226 Difference]: Without dead ends: 506 [2021-11-20 06:15:26,711 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 97 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 446 ImplicationChecksByTransitivity, 15.2s TimeCoverageRelationStatistics Valid=319, Invalid=2333, Unknown=0, NotChecked=0, Total=2652 [2021-11-20 06:15:26,712 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 116 mSDsluCounter, 516 mSDsCounter, 0 mSdLazyCounter, 412 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 543 SdHoareTripleChecker+Invalid, 529 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 412 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 89 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:15:26,712 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 543 Invalid, 529 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 412 Invalid, 0 Unknown, 89 Unchecked, 3.2s Time] [2021-11-20 06:15:26,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2021-11-20 06:15:26,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 411. [2021-11-20 06:15:26,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 409 states have (on average 1.2053789731051345) internal successors, (493), 410 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:15:26,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 493 transitions. [2021-11-20 06:15:26,723 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 493 transitions. Word has length 66 [2021-11-20 06:15:26,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:15:26,723 INFO L470 AbstractCegarLoop]: Abstraction has 411 states and 493 transitions. [2021-11-20 06:15:26,724 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 3.3783783783783785) internal successors, (125), 37 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:15:26,724 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 493 transitions. [2021-11-20 06:15:26,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-20 06:15:26,725 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:15:26,725 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:15:26,748 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f88641-9473-4a1a-aa3d-edd940e60473/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-20 06:15:26,940 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f88641-9473-4a1a-aa3d-edd940e60473/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:15:26,940 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-20 06:15:26,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:15:26,941 INFO L85 PathProgramCache]: Analyzing trace with hash 1218803010, now seen corresponding path program 6 times [2021-11-20 06:15:26,941 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:15:26,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1568252571] [2021-11-20 06:15:26,941 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-20 06:15:26,941 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:15:26,942 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f88641-9473-4a1a-aa3d-edd940e60473/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:15:26,942 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f88641-9473-4a1a-aa3d-edd940e60473/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:15:26,944 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f88641-9473-4a1a-aa3d-edd940e60473/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-20 06:15:27,319 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-11-20 06:15:27,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:15:27,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-20 06:15:27,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:15:27,352 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 8 treesize of output 7 [2021-11-20 06:15:27,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 17 treesize of output 13 [2021-11-20 06:15:28,281 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 100 proven. 62 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-20 06:15:28,281 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:15:29,616 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 100 proven. 62 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-20 06:15:29,617 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:15:29,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1568252571] [2021-11-20 06:15:29,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1568252571] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:15:29,617 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:15:29,617 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 27 [2021-11-20 06:15:29,618 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129191442] [2021-11-20 06:15:29,618 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:15:29,618 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-20 06:15:29,618 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:15:29,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-20 06:15:29,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=593, Unknown=0, NotChecked=0, Total=702 [2021-11-20 06:15:29,619 INFO L87 Difference]: Start difference. First operand 411 states and 493 transitions. Second operand has 27 states, 27 states have (on average 3.3703703703703702) internal successors, (91), 27 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:15:30,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:15:30,906 INFO L93 Difference]: Finished difference Result 391 states and 458 transitions. [2021-11-20 06:15:30,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-20 06:15:30,907 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.3703703703703702) internal successors, (91), 27 states have internal predecessors, (91), 0 states have call successors, (0), 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 [2021-11-20 06:15:30,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:15:30,909 INFO L225 Difference]: With dead ends: 391 [2021-11-20 06:15:30,909 INFO L226 Difference]: Without dead ends: 301 [2021-11-20 06:15:30,910 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=232, Invalid=958, Unknown=0, NotChecked=0, Total=1190 [2021-11-20 06:15:30,910 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 239 mSDsluCounter, 292 mSDsCounter, 0 mSdLazyCounter, 492 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 317 SdHoareTripleChecker+Invalid, 535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-20 06:15:30,911 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [239 Valid, 317 Invalid, 535 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 492 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-20 06:15:30,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2021-11-20 06:15:30,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 301. [2021-11-20 06:15:30,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 299 states have (on average 1.1973244147157192) internal successors, (358), 300 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:15:30,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 358 transitions. [2021-11-20 06:15:30,918 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 358 transitions. Word has length 66 [2021-11-20 06:15:30,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:15:30,919 INFO L470 AbstractCegarLoop]: Abstraction has 301 states and 358 transitions. [2021-11-20 06:15:30,919 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.3703703703703702) internal successors, (91), 27 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:15:30,919 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 358 transitions. [2021-11-20 06:15:30,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-20 06:15:30,921 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:15:30,921 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:15:30,933 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f88641-9473-4a1a-aa3d-edd940e60473/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-20 06:15:31,123 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f88641-9473-4a1a-aa3d-edd940e60473/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:15:31,124 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-20 06:15:31,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:15:31,124 INFO L85 PathProgramCache]: Analyzing trace with hash -163200120, now seen corresponding path program 7 times [2021-11-20 06:15:31,124 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:15:31,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1843771809] [2021-11-20 06:15:31,125 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-20 06:15:31,125 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:15:31,125 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f88641-9473-4a1a-aa3d-edd940e60473/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:15:31,126 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f88641-9473-4a1a-aa3d-edd940e60473/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:15:31,140 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f88641-9473-4a1a-aa3d-edd940e60473/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-20 06:15:31,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:15:31,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-20 06:15:31,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:15:31,314 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 8 treesize of output 7 [2021-11-20 06:15:33,028 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 90 proven. 164 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-20 06:15:33,028 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:15:43,220 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 0 proven. 266 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:15:43,220 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:15:43,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1843771809] [2021-11-20 06:15:43,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1843771809] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:15:43,220 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:15:43,220 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 22] total 40 [2021-11-20 06:15:43,220 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838553227] [2021-11-20 06:15:43,221 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:15:43,221 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-11-20 06:15:43,221 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:15:43,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-11-20 06:15:43,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1375, Unknown=0, NotChecked=0, Total=1560 [2021-11-20 06:15:43,222 INFO L87 Difference]: Start difference. First operand 301 states and 358 transitions. Second operand has 40 states, 40 states have (on average 3.375) internal successors, (135), 40 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:16:00,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:16:00,790 INFO L93 Difference]: Finished difference Result 526 states and 612 transitions. [2021-11-20 06:16:00,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-11-20 06:16:00,792 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 3.375) internal successors, (135), 40 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-11-20 06:16:00,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:16:00,794 INFO L225 Difference]: With dead ends: 526 [2021-11-20 06:16:00,794 INFO L226 Difference]: Without dead ends: 453 [2021-11-20 06:16:00,795 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 105 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 525 ImplicationChecksByTransitivity, 14.9s TimeCoverageRelationStatistics Valid=319, Invalid=2761, Unknown=0, NotChecked=0, Total=3080 [2021-11-20 06:16:00,795 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 188 mSDsluCounter, 1169 mSDsCounter, 0 mSdLazyCounter, 1292 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 1222 SdHoareTripleChecker+Invalid, 1755 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 1292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 426 IncrementalHoareTripleChecker+Unchecked, 11.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:16:00,796 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [188 Valid, 1222 Invalid, 1755 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 1292 Invalid, 0 Unknown, 426 Unchecked, 11.0s Time] [2021-11-20 06:16:00,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2021-11-20 06:16:00,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 400. [2021-11-20 06:16:00,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 398 states have (on average 1.1909547738693467) internal successors, (474), 399 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:16:00,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 474 transitions. [2021-11-20 06:16:00,804 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 474 transitions. Word has length 72 [2021-11-20 06:16:00,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:16:00,804 INFO L470 AbstractCegarLoop]: Abstraction has 400 states and 474 transitions. [2021-11-20 06:16:00,805 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 3.375) internal successors, (135), 40 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:16:00,805 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 474 transitions. [2021-11-20 06:16:00,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-20 06:16:00,806 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:16:00,806 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:16:00,839 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f88641-9473-4a1a-aa3d-edd940e60473/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-11-20 06:16:01,019 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f88641-9473-4a1a-aa3d-edd940e60473/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:16:01,019 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-20 06:16:01,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:16:01,020 INFO L85 PathProgramCache]: Analyzing trace with hash 831488328, now seen corresponding path program 7 times [2021-11-20 06:16:01,020 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:16:01,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [191898207] [2021-11-20 06:16:01,020 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-20 06:16:01,021 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:16:01,021 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f88641-9473-4a1a-aa3d-edd940e60473/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:16:01,021 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f88641-9473-4a1a-aa3d-edd940e60473/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:16:01,078 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f88641-9473-4a1a-aa3d-edd940e60473/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-20 06:16:01,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:16:01,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-20 06:16:01,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:16:01,216 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 8 treesize of output 7 [2021-11-20 06:16:02,954 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 64 proven. 177 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 06:16:02,955 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:16:12,743 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 06:16:12,744 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:16:12,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [191898207] [2021-11-20 06:16:12,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [191898207] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:16:12,744 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:16:12,744 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 21] total 39 [2021-11-20 06:16:12,745 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869256311] [2021-11-20 06:16:12,745 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:16:12,745 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-11-20 06:16:12,746 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:16:12,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-11-20 06:16:12,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=1299, Unknown=0, NotChecked=0, Total=1482 [2021-11-20 06:16:12,748 INFO L87 Difference]: Start difference. First operand 400 states and 474 transitions. Second operand has 39 states, 39 states have (on average 3.6153846153846154) internal successors, (141), 39 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:16:17,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:16:17,753 INFO L93 Difference]: Finished difference Result 690 states and 813 transitions. [2021-11-20 06:16:17,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-20 06:16:17,755 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 3.6153846153846154) internal successors, (141), 39 states have internal predecessors, (141), 0 states have call successors, (0), 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 74 [2021-11-20 06:16:17,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:16:17,757 INFO L225 Difference]: With dead ends: 690 [2021-11-20 06:16:17,757 INFO L226 Difference]: Without dead ends: 687 [2021-11-20 06:16:17,758 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 109 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=224, Invalid=1498, Unknown=0, NotChecked=0, Total=1722 [2021-11-20 06:16:17,759 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 111 mSDsluCounter, 519 mSDsCounter, 0 mSdLazyCounter, 488 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 548 SdHoareTripleChecker+Invalid, 557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 36 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:16:17,759 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 548 Invalid, 557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 488 Invalid, 0 Unknown, 36 Unchecked, 4.3s Time] [2021-11-20 06:16:17,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 687 states. [2021-11-20 06:16:17,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 687 to 609. [2021-11-20 06:16:17,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 609 states, 607 states have (on average 1.2059308072487644) internal successors, (732), 608 states have internal predecessors, (732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:16:17,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 609 states to 609 states and 732 transitions. [2021-11-20 06:16:17,773 INFO L78 Accepts]: Start accepts. Automaton has 609 states and 732 transitions. Word has length 74 [2021-11-20 06:16:17,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:16:17,773 INFO L470 AbstractCegarLoop]: Abstraction has 609 states and 732 transitions. [2021-11-20 06:16:17,773 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 3.6153846153846154) internal successors, (141), 39 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:16:17,774 INFO L276 IsEmpty]: Start isEmpty. Operand 609 states and 732 transitions. [2021-11-20 06:16:17,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-20 06:16:17,775 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:16:17,776 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:16:17,804 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f88641-9473-4a1a-aa3d-edd940e60473/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-11-20 06:16:17,989 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f88641-9473-4a1a-aa3d-edd940e60473/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:16:17,990 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-20 06:16:17,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:16:17,990 INFO L85 PathProgramCache]: Analyzing trace with hash -619577093, now seen corresponding path program 8 times [2021-11-20 06:16:17,990 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:16:17,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [910126859] [2021-11-20 06:16:17,990 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 06:16:17,991 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:16:17,991 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f88641-9473-4a1a-aa3d-edd940e60473/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:16:17,991 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f88641-9473-4a1a-aa3d-edd940e60473/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:16:17,993 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f88641-9473-4a1a-aa3d-edd940e60473/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-20 06:16:18,118 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 06:16:18,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:16:18,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-20 06:16:18,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:16:18,153 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 8 treesize of output 7 [2021-11-20 06:16:20,304 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 34 proven. 248 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:16:20,304 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:16:34,546 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 0 proven. 282 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:16:34,546 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:16:34,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [910126859] [2021-11-20 06:16:34,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [910126859] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:16:34,547 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:16:34,547 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 24] total 46 [2021-11-20 06:16:34,547 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103037548] [2021-11-20 06:16:34,547 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:16:34,547 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-11-20 06:16:34,548 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:16:34,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-11-20 06:16:34,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=1838, Unknown=0, NotChecked=0, Total=2070 [2021-11-20 06:16:34,549 INFO L87 Difference]: Start difference. First operand 609 states and 732 transitions. Second operand has 46 states, 46 states have (on average 3.260869565217391) internal successors, (150), 46 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:17:20,544 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:17:26,736 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:17:38,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:17:38,557 INFO L93 Difference]: Finished difference Result 976 states and 1138 transitions. [2021-11-20 06:17:38,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-11-20 06:17:38,559 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 3.260869565217391) internal successors, (150), 46 states have internal predecessors, (150), 0 states have call successors, (0), 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 76 [2021-11-20 06:17:38,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:17:38,563 INFO L225 Difference]: With dead ends: 976 [2021-11-20 06:17:38,563 INFO L226 Difference]: Without dead ends: 973 [2021-11-20 06:17:38,565 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 107 SyntacticMatches, 17 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2286 ImplicationChecksByTransitivity, 50.8s TimeCoverageRelationStatistics Valid=1102, Invalid=7454, Unknown=0, NotChecked=0, Total=8556 [2021-11-20 06:17:38,566 INFO L933 BasicCegarLoop]: 107 mSDtfsCounter, 1818 mSDsluCounter, 2235 mSDsCounter, 0 mSdLazyCounter, 2967 mSolverCounterSat, 229 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1818 SdHoareTripleChecker+Valid, 2342 SdHoareTripleChecker+Invalid, 3866 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 229 IncrementalHoareTripleChecker+Valid, 2967 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 670 IncrementalHoareTripleChecker+Unchecked, 24.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:17:38,566 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1818 Valid, 2342 Invalid, 3866 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [229 Valid, 2967 Invalid, 0 Unknown, 670 Unchecked, 24.0s Time] [2021-11-20 06:17:38,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 973 states. [2021-11-20 06:17:38,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 973 to 460. [2021-11-20 06:17:38,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 460 states, 458 states have (on average 1.1986899563318778) internal successors, (549), 459 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:17:38,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 549 transitions. [2021-11-20 06:17:38,596 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 549 transitions. Word has length 76 [2021-11-20 06:17:38,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:17:38,597 INFO L470 AbstractCegarLoop]: Abstraction has 460 states and 549 transitions. [2021-11-20 06:17:38,597 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 3.260869565217391) internal successors, (150), 46 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:17:38,597 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 549 transitions. [2021-11-20 06:17:38,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-20 06:17:38,599 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:17:38,599 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:17:38,612 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f88641-9473-4a1a-aa3d-edd940e60473/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-11-20 06:17:38,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f88641-9473-4a1a-aa3d-edd940e60473/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:17:38,812 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-20 06:17:38,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:17:38,812 INFO L85 PathProgramCache]: Analyzing trace with hash 1922776062, now seen corresponding path program 9 times [2021-11-20 06:17:38,812 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:17:38,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [678973402] [2021-11-20 06:17:38,813 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 06:17:38,813 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:17:38,813 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f88641-9473-4a1a-aa3d-edd940e60473/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:17:38,815 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f88641-9473-4a1a-aa3d-edd940e60473/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:17:38,816 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f88641-9473-4a1a-aa3d-edd940e60473/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-20 06:17:39,366 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-11-20 06:17:39,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:17:39,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-20 06:17:39,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:17:39,403 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 8 treesize of output 7 [2021-11-20 06:17:40,864 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-11-20 06:17:40,864 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:17:46,770 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-11-20 06:17:46,770 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:17:46,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [678973402] [2021-11-20 06:17:46,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [678973402] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:17:46,770 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:17:46,770 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 29 [2021-11-20 06:17:46,771 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473304846] [2021-11-20 06:17:46,771 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:17:46,771 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-20 06:17:46,771 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:17:46,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-20 06:17:46,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=682, Unknown=0, NotChecked=0, Total=870 [2021-11-20 06:17:46,772 INFO L87 Difference]: Start difference. First operand 460 states and 549 transitions. Second operand has 30 states, 29 states have (on average 3.2413793103448274) internal successors, (94), 30 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:18:19,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:18:19,331 INFO L93 Difference]: Finished difference Result 731 states and 855 transitions. [2021-11-20 06:18:19,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-11-20 06:18:19,332 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 3.2413793103448274) internal successors, (94), 30 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-11-20 06:18:19,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:18:19,335 INFO L225 Difference]: With dead ends: 731 [2021-11-20 06:18:19,335 INFO L226 Difference]: Without dead ends: 731 [2021-11-20 06:18:19,336 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1076 ImplicationChecksByTransitivity, 31.5s TimeCoverageRelationStatistics Valid=1219, Invalid=3337, Unknown=0, NotChecked=0, Total=4556 [2021-11-20 06:18:19,337 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 814 mSDsluCounter, 534 mSDsCounter, 0 mSdLazyCounter, 705 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 814 SdHoareTripleChecker+Valid, 576 SdHoareTripleChecker+Invalid, 830 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 705 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 78 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2021-11-20 06:18:19,337 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [814 Valid, 576 Invalid, 830 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 705 Invalid, 0 Unknown, 78 Unchecked, 4.8s Time] [2021-11-20 06:18:19,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 731 states. [2021-11-20 06:18:19,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 731 to 365. [2021-11-20 06:18:19,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 363 states have (on average 1.165289256198347) internal successors, (423), 364 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:18:19,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 423 transitions. [2021-11-20 06:18:19,345 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 423 transitions. Word has length 80 [2021-11-20 06:18:19,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:18:19,346 INFO L470 AbstractCegarLoop]: Abstraction has 365 states and 423 transitions. [2021-11-20 06:18:19,346 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 3.2413793103448274) internal successors, (94), 30 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:18:19,346 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 423 transitions. [2021-11-20 06:18:19,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-20 06:18:19,348 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:18:19,348 INFO L514 BasicCegarLoop]: trace histogram [20, 19, 19, 19, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:18:19,379 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f88641-9473-4a1a-aa3d-edd940e60473/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (29)] Ended with exit code 0 [2021-11-20 06:18:19,563 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f88641-9473-4a1a-aa3d-edd940e60473/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:18:19,563 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-20 06:18:19,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:18:19,564 INFO L85 PathProgramCache]: Analyzing trace with hash 797850806, now seen corresponding path program 10 times [2021-11-20 06:18:19,565 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:18:19,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1327049443] [2021-11-20 06:18:19,565 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 06:18:19,565 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:18:19,565 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f88641-9473-4a1a-aa3d-edd940e60473/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:18:19,566 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f88641-9473-4a1a-aa3d-edd940e60473/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:18:19,568 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f88641-9473-4a1a-aa3d-edd940e60473/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-11-20 06:18:19,771 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 06:18:19,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:18:19,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 40 conjunts are in the unsatisfiable core [2021-11-20 06:18:19,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:18:19,810 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 8 treesize of output 7 [2021-11-20 06:18:22,552 INFO L134 CoverageAnalysis]: Checked inductivity of 813 backedges. 248 proven. 541 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-20 06:18:22,552 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:18:44,277 INFO L134 CoverageAnalysis]: Checked inductivity of 813 backedges. 0 proven. 813 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:18:44,277 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:18:44,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1327049443] [2021-11-20 06:18:44,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1327049443] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:18:44,279 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:18:44,280 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 32] total 59 [2021-11-20 06:18:44,280 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007371162] [2021-11-20 06:18:44,280 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:18:44,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2021-11-20 06:18:44,281 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:18:44,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-11-20 06:18:44,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=442, Invalid=2980, Unknown=0, NotChecked=0, Total=3422 [2021-11-20 06:18:44,282 INFO L87 Difference]: Start difference. First operand 365 states and 423 transitions. Second operand has 59 states, 59 states have (on average 3.5762711864406778) internal successors, (211), 59 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:20:33,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:20:33,652 INFO L93 Difference]: Finished difference Result 1128 states and 1267 transitions. [2021-11-20 06:20:33,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2021-11-20 06:20:33,654 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 3.5762711864406778) internal successors, (211), 59 states have internal predecessors, (211), 0 states have call successors, (0), 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 112 [2021-11-20 06:20:33,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:20:33,658 INFO L225 Difference]: With dead ends: 1128 [2021-11-20 06:20:33,658 INFO L226 Difference]: Without dead ends: 1080 [2021-11-20 06:20:33,660 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 165 SyntacticMatches, 1 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3372 ImplicationChecksByTransitivity, 84.1s TimeCoverageRelationStatistics Valid=1998, Invalid=16092, Unknown=0, NotChecked=0, Total=18090 [2021-11-20 06:20:33,660 INFO L933 BasicCegarLoop]: 111 mSDtfsCounter, 1940 mSDsluCounter, 3267 mSDsCounter, 0 mSdLazyCounter, 4787 mSolverCounterSat, 236 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 41.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1940 SdHoareTripleChecker+Valid, 3378 SdHoareTripleChecker+Invalid, 6296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 236 IncrementalHoareTripleChecker+Valid, 4787 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1273 IncrementalHoareTripleChecker+Unchecked, 44.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:20:33,661 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1940 Valid, 3378 Invalid, 6296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [236 Valid, 4787 Invalid, 0 Unknown, 1273 Unchecked, 44.0s Time] [2021-11-20 06:20:33,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1080 states. [2021-11-20 06:20:33,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1080 to 527. [2021-11-20 06:20:33,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 527 states, 525 states have (on average 1.1542857142857144) internal successors, (606), 526 states have internal predecessors, (606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:20:33,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 527 states to 527 states and 606 transitions. [2021-11-20 06:20:33,673 INFO L78 Accepts]: Start accepts. Automaton has 527 states and 606 transitions. Word has length 112 [2021-11-20 06:20:33,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:20:33,673 INFO L470 AbstractCegarLoop]: Abstraction has 527 states and 606 transitions. [2021-11-20 06:20:33,674 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 3.5762711864406778) internal successors, (211), 59 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:20:33,674 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states and 606 transitions. [2021-11-20 06:20:33,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-11-20 06:20:33,676 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:20:33,676 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:20:33,711 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f88641-9473-4a1a-aa3d-edd940e60473/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (30)] Ended with exit code 0 [2021-11-20 06:20:33,915 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f88641-9473-4a1a-aa3d-edd940e60473/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:20:33,915 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-20 06:20:33,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:20:33,915 INFO L85 PathProgramCache]: Analyzing trace with hash -671651447, now seen corresponding path program 8 times [2021-11-20 06:20:33,916 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:20:33,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [989169012] [2021-11-20 06:20:33,916 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 06:20:33,916 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:20:33,916 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f88641-9473-4a1a-aa3d-edd940e60473/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:20:33,917 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f88641-9473-4a1a-aa3d-edd940e60473/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:20:33,918 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f88641-9473-4a1a-aa3d-edd940e60473/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-11-20 06:20:34,080 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 06:20:34,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:20:34,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 40 conjunts are in the unsatisfiable core [2021-11-20 06:20:34,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:20:34,135 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 8 treesize of output 7 [2021-11-20 06:20:37,425 INFO L134 CoverageAnalysis]: Checked inductivity of 852 backedges. 256 proven. 570 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-20 06:20:37,430 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:21:02,241 INFO L134 CoverageAnalysis]: Checked inductivity of 852 backedges. 0 proven. 850 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 06:21:02,242 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:21:02,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [989169012] [2021-11-20 06:21:02,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [989169012] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:21:02,242 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:21:02,242 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 32] total 59 [2021-11-20 06:21:02,242 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272123019] [2021-11-20 06:21:02,242 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:21:02,243 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2021-11-20 06:21:02,243 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:21:02,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-11-20 06:21:02,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=442, Invalid=2980, Unknown=0, NotChecked=0, Total=3422 [2021-11-20 06:21:02,244 INFO L87 Difference]: Start difference. First operand 527 states and 606 transitions. Second operand has 59 states, 59 states have (on average 3.7457627118644066) internal successors, (221), 59 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:21:57,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:21:57,206 INFO L93 Difference]: Finished difference Result 1591 states and 1840 transitions. [2021-11-20 06:21:57,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-11-20 06:21:57,208 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 3.7457627118644066) internal successors, (221), 59 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 118 [2021-11-20 06:21:57,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:21:57,214 INFO L225 Difference]: With dead ends: 1591 [2021-11-20 06:21:57,214 INFO L226 Difference]: Without dead ends: 1588 [2021-11-20 06:21:57,214 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 179 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1076 ImplicationChecksByTransitivity, 51.8s TimeCoverageRelationStatistics Valid=947, Invalid=6535, Unknown=0, NotChecked=0, Total=7482 [2021-11-20 06:21:57,215 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 602 mSDsluCounter, 1866 mSDsCounter, 0 mSdLazyCounter, 2329 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 23.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 602 SdHoareTripleChecker+Valid, 1926 SdHoareTripleChecker+Invalid, 2577 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 2329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 144 IncrementalHoareTripleChecker+Unchecked, 24.6s IncrementalHoareTripleChecker+Time [2021-11-20 06:21:57,215 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [602 Valid, 1926 Invalid, 2577 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 2329 Invalid, 0 Unknown, 144 Unchecked, 24.6s Time] [2021-11-20 06:21:57,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1588 states. [2021-11-20 06:21:57,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1588 to 838. [2021-11-20 06:21:57,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 838 states, 836 states have (on average 1.1830143540669857) internal successors, (989), 837 states have internal predecessors, (989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:21:57,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 838 states to 838 states and 989 transitions. [2021-11-20 06:21:57,231 INFO L78 Accepts]: Start accepts. Automaton has 838 states and 989 transitions. Word has length 118 [2021-11-20 06:21:57,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:21:57,231 INFO L470 AbstractCegarLoop]: Abstraction has 838 states and 989 transitions. [2021-11-20 06:21:57,231 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 3.7457627118644066) internal successors, (221), 59 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:21:57,232 INFO L276 IsEmpty]: Start isEmpty. Operand 838 states and 989 transitions. [2021-11-20 06:21:57,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-11-20 06:21:57,233 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:21:57,234 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:21:57,267 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f88641-9473-4a1a-aa3d-edd940e60473/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (31)] Ended with exit code 0 [2021-11-20 06:21:57,468 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f88641-9473-4a1a-aa3d-edd940e60473/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:21:57,468 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-20 06:21:57,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:21:57,468 INFO L85 PathProgramCache]: Analyzing trace with hash 1396687433, now seen corresponding path program 9 times [2021-11-20 06:21:57,469 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:21:57,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1287624708] [2021-11-20 06:21:57,469 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 06:21:57,469 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:21:57,469 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f88641-9473-4a1a-aa3d-edd940e60473/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:21:57,470 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f88641-9473-4a1a-aa3d-edd940e60473/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:21:57,470 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78f88641-9473-4a1a-aa3d-edd940e60473/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-11-20 06:21:58,565 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-11-20 06:21:58,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:21:58,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 37 conjunts are in the unsatisfiable core [2021-11-20 06:21:58,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:21:58,616 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 8 treesize of output 7 [2021-11-20 06:22:04,574 INFO L134 CoverageAnalysis]: Checked inductivity of 852 backedges. 396 proven. 191 refuted. 0 times theorem prover too weak. 265 trivial. 0 not checked. [2021-11-20 06:22:04,574 INFO L328 TraceCheckSpWp]: Computing backward predicates...