./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_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/array01-alloca-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c01598788c0e593641b4d52eb46aec8832108f2ffb3b67e30286093c8a1926f8 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 01:49:57,218 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 01:49:57,221 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 01:49:57,275 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 01:49:57,276 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 01:49:57,280 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 01:49:57,282 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 01:49:57,286 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 01:49:57,289 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 01:49:57,295 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 01:49:57,296 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 01:49:57,298 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 01:49:57,298 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 01:49:57,301 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 01:49:57,302 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 01:49:57,307 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 01:49:57,309 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 01:49:57,310 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 01:49:57,312 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 01:49:57,322 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 01:49:57,324 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 01:49:57,325 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 01:49:57,328 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 01:49:57,329 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 01:49:57,338 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 01:49:57,339 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 01:49:57,339 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 01:49:57,341 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 01:49:57,342 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 01:49:57,343 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 01:49:57,344 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 01:49:57,345 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 01:49:57,346 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 01:49:57,347 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 01:49:57,349 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 01:49:57,349 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 01:49:57,350 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 01:49:57,350 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 01:49:57,350 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 01:49:57,351 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 01:49:57,352 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 01:49:57,353 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-11-21 01:49:57,400 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 01:49:57,401 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 01:49:57,401 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 01:49:57,402 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 01:49:57,402 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 01:49:57,403 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 01:49:57,403 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 01:49:57,403 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 01:49:57,403 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 01:49:57,404 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-21 01:49:57,405 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 01:49:57,405 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 01:49:57,405 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-21 01:49:57,405 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-21 01:49:57,406 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 01:49:57,406 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-21 01:49:57,406 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-21 01:49:57,406 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-21 01:49:57,407 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-21 01:49:57,407 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-21 01:49:57,408 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 01:49:57,408 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-21 01:49:57,408 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-21 01:49:57,410 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 01:49:57,410 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-21 01:49:57,410 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 01:49:57,410 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-21 01:49:57,411 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-21 01:49:57,411 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-21 01:49:57,411 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 01:49:57,411 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-21 01:49:57,412 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-21 01:49:57,412 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 01:49:57,412 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 01:49:57,412 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 01:49:57,413 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:49:57,413 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 01:49:57,413 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 01:49:57,413 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-21 01:49:57,413 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-21 01:49:57,414 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 01:49:57,414 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 01:49:57,414 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c01598788c0e593641b4d52eb46aec8832108f2ffb3b67e30286093c8a1926f8 [2021-11-21 01:49:57,725 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 01:49:57,761 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 01:49:57,763 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 01:49:57,765 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 01:49:57,765 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 01:49:57,767 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/array-memsafety/array01-alloca-2.i [2021-11-21 01:49:57,848 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/data/1c09a33f1/7d0886132d454e178d69d27c29b96ec9/FLAGf5fbe63c5 [2021-11-21 01:49:58,513 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 01:49:58,514 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/sv-benchmarks/c/array-memsafety/array01-alloca-2.i [2021-11-21 01:49:58,531 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/data/1c09a33f1/7d0886132d454e178d69d27c29b96ec9/FLAGf5fbe63c5 [2021-11-21 01:49:58,851 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/data/1c09a33f1/7d0886132d454e178d69d27c29b96ec9 [2021-11-21 01:49:58,853 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 01:49:58,855 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 01:49:58,857 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 01:49:58,857 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 01:49:58,861 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 01:49:58,862 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:49:58" (1/1) ... [2021-11-21 01:49:58,863 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@13e6dc5f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:49:58, skipping insertion in model container [2021-11-21 01:49:58,863 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:49:58" (1/1) ... [2021-11-21 01:49:58,871 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 01:49:58,910 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 01:49:59,186 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:49:59,195 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) [2021-11-21 01:49:59,196 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@2fa539bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:49:59, skipping insertion in model container [2021-11-21 01:49:59,196 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 01:49:59,197 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-21 01:49:59,198 INFO L158 Benchmark]: Toolchain (without parser) took 342.65ms. Allocated memory is still 121.6MB. Free memory was 85.4MB in the beginning and 95.7MB in the end (delta: -10.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-21 01:49:59,199 INFO L158 Benchmark]: CDTParser took 0.24ms. Allocated memory is still 121.6MB. Free memory was 92.6MB in the beginning and 92.6MB in the end (delta: 28.8kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-21 01:49:59,200 INFO L158 Benchmark]: CACSL2BoogieTranslator took 339.89ms. Allocated memory is still 121.6MB. Free memory was 85.2MB in the beginning and 96.3MB in the end (delta: -11.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-21 01:49:59,202 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24ms. Allocated memory is still 121.6MB. Free memory was 92.6MB in the beginning and 92.6MB in the end (delta: 28.8kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 339.89ms. Allocated memory is still 121.6MB. Free memory was 85.2MB in the beginning and 96.3MB in the end (delta: -11.1MB). Peak memory consumption was 10.5MB. 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_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/array01-alloca-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c01598788c0e593641b4d52eb46aec8832108f2ffb3b67e30286093c8a1926f8 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 01:50:01,391 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 01:50:01,393 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 01:50:01,424 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 01:50:01,424 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 01:50:01,426 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 01:50:01,427 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 01:50:01,430 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 01:50:01,432 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 01:50:01,433 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 01:50:01,434 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 01:50:01,435 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 01:50:01,436 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 01:50:01,437 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 01:50:01,438 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 01:50:01,440 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 01:50:01,441 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 01:50:01,442 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 01:50:01,444 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 01:50:01,446 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 01:50:01,448 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 01:50:01,449 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 01:50:01,451 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 01:50:01,451 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 01:50:01,455 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 01:50:01,455 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 01:50:01,456 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 01:50:01,457 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 01:50:01,457 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 01:50:01,458 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 01:50:01,459 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 01:50:01,460 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 01:50:01,460 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 01:50:01,461 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 01:50:01,463 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 01:50:01,463 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 01:50:01,471 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 01:50:01,471 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 01:50:01,471 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 01:50:01,473 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 01:50:01,473 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 01:50:01,474 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2021-11-21 01:50:01,502 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 01:50:01,503 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 01:50:01,503 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 01:50:01,503 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 01:50:01,504 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 01:50:01,504 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 01:50:01,504 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 01:50:01,505 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 01:50:01,505 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 01:50:01,505 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 01:50:01,505 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 01:50:01,505 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 01:50:01,506 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-21 01:50:01,506 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-21 01:50:01,507 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 01:50:01,507 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-21 01:50:01,507 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-21 01:50:01,507 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 01:50:01,507 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-21 01:50:01,508 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 01:50:01,508 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-21 01:50:01,508 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-21 01:50:01,508 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-21 01:50:01,508 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 01:50:01,508 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-21 01:50:01,509 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-21 01:50:01,509 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-21 01:50:01,509 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-21 01:50:01,509 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 01:50:01,509 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 01:50:01,510 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-21 01:50:01,510 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 01:50:01,510 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:50:01,510 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 01:50:01,510 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 01:50:01,511 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-21 01:50:01,511 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-21 01:50:01,511 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 01:50:01,511 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 01:50:01,511 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_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c01598788c0e593641b4d52eb46aec8832108f2ffb3b67e30286093c8a1926f8 [2021-11-21 01:50:01,909 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 01:50:01,937 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 01:50:01,940 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 01:50:01,942 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 01:50:01,943 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 01:50:01,944 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/array-memsafety/array01-alloca-2.i [2021-11-21 01:50:02,017 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/data/cc536f8ed/36558c1d42494165b3f1b67281e8aa19/FLAGd3e6cf430 [2021-11-21 01:50:02,692 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 01:50:02,692 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/sv-benchmarks/c/array-memsafety/array01-alloca-2.i [2021-11-21 01:50:02,713 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/data/cc536f8ed/36558c1d42494165b3f1b67281e8aa19/FLAGd3e6cf430 [2021-11-21 01:50:02,929 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/data/cc536f8ed/36558c1d42494165b3f1b67281e8aa19 [2021-11-21 01:50:02,935 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 01:50:02,936 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 01:50:02,937 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 01:50:02,937 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 01:50:02,945 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 01:50:02,946 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:50:02" (1/1) ... [2021-11-21 01:50:02,947 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f4908a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:50:02, skipping insertion in model container [2021-11-21 01:50:02,947 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:50:02" (1/1) ... [2021-11-21 01:50:02,955 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 01:50:03,008 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 01:50:03,296 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:50:03,320 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-21 01:50:03,327 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 01:50:03,375 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:50:03,385 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 01:50:03,459 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:50:03,490 INFO L208 MainTranslator]: Completed translation [2021-11-21 01:50:03,490 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:50:03 WrapperNode [2021-11-21 01:50:03,491 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 01:50:03,492 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 01:50:03,492 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 01:50:03,492 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 01:50:03,499 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:50:03" (1/1) ... [2021-11-21 01:50:03,515 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:50:03" (1/1) ... [2021-11-21 01:50:03,535 INFO L137 Inliner]: procedures = 117, calls = 9, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 55 [2021-11-21 01:50:03,536 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 01:50:03,537 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 01:50:03,537 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 01:50:03,537 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 01:50:03,545 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:50:03" (1/1) ... [2021-11-21 01:50:03,546 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:50:03" (1/1) ... [2021-11-21 01:50:03,549 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:50:03" (1/1) ... [2021-11-21 01:50:03,550 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:50:03" (1/1) ... [2021-11-21 01:50:03,558 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:50:03" (1/1) ... [2021-11-21 01:50:03,562 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:50:03" (1/1) ... [2021-11-21 01:50:03,564 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:50:03" (1/1) ... [2021-11-21 01:50:03,567 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 01:50:03,576 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 01:50:03,577 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 01:50:03,577 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 01:50:03,578 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:50:03" (1/1) ... [2021-11-21 01:50:03,589 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:50:03,598 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:50:03,608 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 01:50:03,610 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 01:50:03,645 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-21 01:50:03,645 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-21 01:50:03,646 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-21 01:50:03,646 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-21 01:50:03,646 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 01:50:03,646 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 01:50:03,737 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 01:50:03,739 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 01:50:03,975 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 01:50:03,982 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 01:50:03,982 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-21 01:50:03,983 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:50:03 BoogieIcfgContainer [2021-11-21 01:50:03,984 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 01:50:03,985 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 01:50:03,985 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 01:50:03,988 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 01:50:03,988 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 01:50:02" (1/3) ... [2021-11-21 01:50:03,989 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c1a7028 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:50:03, skipping insertion in model container [2021-11-21 01:50:03,989 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:50:03" (2/3) ... [2021-11-21 01:50:03,989 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c1a7028 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:50:03, skipping insertion in model container [2021-11-21 01:50:03,989 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:50:03" (3/3) ... [2021-11-21 01:50:03,991 INFO L111 eAbstractionObserver]: Analyzing ICFG array01-alloca-2.i [2021-11-21 01:50:03,996 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 01:50:03,996 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 9 error locations. [2021-11-21 01:50:04,040 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 01:50:04,047 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 [2021-11-21 01:50:04,047 INFO L340 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2021-11-21 01:50:04,060 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) [2021-11-21 01:50:04,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-21 01:50:04,066 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:50:04,067 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-21 01:50:04,067 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-21 01:50:04,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:50:04,073 INFO L85 PathProgramCache]: Analyzing trace with hash 889508873, now seen corresponding path program 1 times [2021-11-21 01:50:04,083 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:50:04,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [319682648] [2021-11-21 01:50:04,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:50:04,104 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:50:04,104 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:50:04,108 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:50:04,137 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-21 01:50:04,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:50:04,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 21 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-21 01:50:04,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:50:04,307 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 [2021-11-21 01:50:04,347 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:50:04,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:50:04,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:50:04,382 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:50:04,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [319682648] [2021-11-21 01:50:04,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [319682648] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 01:50:04,383 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:50:04,383 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-21 01:50:04,385 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375153990] [2021-11-21 01:50:04,386 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 01:50:04,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:50:04,391 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:50:04,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:50:04,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:50:04,429 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) [2021-11-21 01:50:04,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:50:04,518 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2021-11-21 01:50:04,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:50:04,521 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 [2021-11-21 01:50:04,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:50:04,528 INFO L225 Difference]: With dead ends: 30 [2021-11-21 01:50:04,528 INFO L226 Difference]: Without dead ends: 28 [2021-11-21 01:50:04,530 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 [2021-11-21 01:50:04,534 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 [2021-11-21 01:50:04,535 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] [2021-11-21 01:50:04,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-11-21 01:50:04,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-11-21 01:50:04,575 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) [2021-11-21 01:50:04,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2021-11-21 01:50:04,578 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 6 [2021-11-21 01:50:04,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:50:04,579 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2021-11-21 01:50:04,580 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) [2021-11-21 01:50:04,580 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2021-11-21 01:50:04,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-21 01:50:04,581 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:50:04,581 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-21 01:50:04,596 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-11-21 01:50:04,795 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:50:04,795 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-21 01:50:04,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:50:04,796 INFO L85 PathProgramCache]: Analyzing trace with hash 889508874, now seen corresponding path program 1 times [2021-11-21 01:50:04,797 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:50:04,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [543934476] [2021-11-21 01:50:04,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:50:04,797 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:50:04,798 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:50:04,799 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:50:04,825 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-21 01:50:04,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:50:04,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 21 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-21 01:50:04,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:50:04,903 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 [2021-11-21 01:50:04,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:50:04,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:50:05,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:50:05,195 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:50:05,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [543934476] [2021-11-21 01:50:05,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [543934476] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 01:50:05,195 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:50:05,196 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-21 01:50:05,196 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995965111] [2021-11-21 01:50:05,196 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 01:50:05,197 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 01:50:05,197 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:50:05,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 01:50:05,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-21 01:50:05,199 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) [2021-11-21 01:50:05,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:50:05,776 INFO L93 Difference]: Finished difference Result 78 states and 85 transitions. [2021-11-21 01:50:05,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-21 01:50:05,778 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 [2021-11-21 01:50:05,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:50:05,780 INFO L225 Difference]: With dead ends: 78 [2021-11-21 01:50:05,780 INFO L226 Difference]: Without dead ends: 78 [2021-11-21 01:50:05,780 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 [2021-11-21 01:50:05,782 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, 0.4s IncrementalHoareTripleChecker+Time [2021-11-21 01:50:05,783 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 102 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-21 01:50:05,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-11-21 01:50:05,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 32. [2021-11-21 01:50:05,789 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) [2021-11-21 01:50:05,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2021-11-21 01:50:05,790 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 6 [2021-11-21 01:50:05,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:50:05,791 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2021-11-21 01:50:05,791 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) [2021-11-21 01:50:05,791 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2021-11-21 01:50:05,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-21 01:50:05,792 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:50:05,792 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:50:05,803 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-21 01:50:06,003 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:50:06,003 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-21 01:50:06,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:50:06,004 INFO L85 PathProgramCache]: Analyzing trace with hash 176742583, now seen corresponding path program 1 times [2021-11-21 01:50:06,005 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:50:06,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1373666459] [2021-11-21 01:50:06,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:50:06,005 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:50:06,005 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:50:06,006 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:50:06,021 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-21 01:50:06,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:50:06,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-21 01:50:06,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:50:06,090 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 [2021-11-21 01:50:06,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:50:06,137 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:50:06,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:50:06,187 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:50:06,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1373666459] [2021-11-21 01:50:06,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1373666459] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 01:50:06,188 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:50:06,190 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-21 01:50:06,190 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897271716] [2021-11-21 01:50:06,190 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 01:50:06,191 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:50:06,191 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:50:06,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:50:06,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:50:06,194 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) [2021-11-21 01:50:06,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:50:06,309 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2021-11-21 01:50:06,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 01:50:06,310 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 [2021-11-21 01:50:06,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:50:06,310 INFO L225 Difference]: With dead ends: 29 [2021-11-21 01:50:06,310 INFO L226 Difference]: Without dead ends: 29 [2021-11-21 01:50:06,311 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 [2021-11-21 01:50:06,312 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 [2021-11-21 01:50:06,312 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] [2021-11-21 01:50:06,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-11-21 01:50:06,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-11-21 01:50:06,315 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) [2021-11-21 01:50:06,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2021-11-21 01:50:06,317 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 8 [2021-11-21 01:50:06,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:50:06,317 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2021-11-21 01:50:06,317 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) [2021-11-21 01:50:06,317 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2021-11-21 01:50:06,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-21 01:50:06,318 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:50:06,318 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:50:06,331 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-21 01:50:06,528 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:50:06,529 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-21 01:50:06,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:50:06,530 INFO L85 PathProgramCache]: Analyzing trace with hash 176742584, now seen corresponding path program 1 times [2021-11-21 01:50:06,530 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:50:06,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [695614169] [2021-11-21 01:50:06,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:50:06,531 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:50:06,531 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:50:06,532 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:50:06,537 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-21 01:50:06,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:50:06,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-21 01:50:06,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:50:06,614 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 [2021-11-21 01:50:06,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:50:06,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:50:07,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:50:07,078 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:50:07,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [695614169] [2021-11-21 01:50:07,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [695614169] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 01:50:07,078 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:50:07,078 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 5] imperfect sequences [] total 8 [2021-11-21 01:50:07,079 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964252685] [2021-11-21 01:50:07,079 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 01:50:07,079 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-21 01:50:07,079 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:50:07,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-21 01:50:07,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-21 01:50:07,080 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) [2021-11-21 01:50:07,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:50:07,514 INFO L93 Difference]: Finished difference Result 35 states and 38 transitions. [2021-11-21 01:50:07,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 01:50:07,517 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 [2021-11-21 01:50:07,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:50:07,518 INFO L225 Difference]: With dead ends: 35 [2021-11-21 01:50:07,518 INFO L226 Difference]: Without dead ends: 35 [2021-11-21 01:50:07,518 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-21 01:50:07,520 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 70 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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 [2021-11-21 01:50:07,520 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] [2021-11-21 01:50:07,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-11-21 01:50:07,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 27. [2021-11-21 01:50:07,524 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) [2021-11-21 01:50:07,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2021-11-21 01:50:07,525 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 8 [2021-11-21 01:50:07,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:50:07,525 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2021-11-21 01:50:07,525 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) [2021-11-21 01:50:07,525 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2021-11-21 01:50:07,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-21 01:50:07,526 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:50:07,526 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:50:07,545 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-21 01:50:07,736 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:50:07,736 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-21 01:50:07,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:50:07,737 INFO L85 PathProgramCache]: Analyzing trace with hash -1091210163, now seen corresponding path program 1 times [2021-11-21 01:50:07,737 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:50:07,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [326737318] [2021-11-21 01:50:07,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:50:07,738 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:50:07,738 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:50:07,739 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:50:07,745 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-21 01:50:07,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:50:07,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-21 01:50:07,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:50:07,854 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:50:07,854 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:50:07,914 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:50:07,915 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:50:07,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [326737318] [2021-11-21 01:50:07,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [326737318] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:50:07,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1348122717] [2021-11-21 01:50:07,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:50:07,915 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 01:50:07,916 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 01:50:07,921 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 01:50:07,941 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2021-11-21 01:50:08,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:50:08,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-21 01:50:08,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:50:08,066 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:50:08,067 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:50:08,099 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:50:08,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1348122717] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:50:08,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865398911] [2021-11-21 01:50:08,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:50:08,100 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:50:08,100 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:50:08,102 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:50:08,121 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-21 01:50:08,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:50:08,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-21 01:50:08,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:50:08,223 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:50:08,223 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:50:08,258 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:50:08,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1865398911] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:50:08,259 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-21 01:50:08,259 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 8 [2021-11-21 01:50:08,259 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368485386] [2021-11-21 01:50:08,260 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-21 01:50:08,260 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-21 01:50:08,260 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:50:08,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-21 01:50:08,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-11-21 01:50:08,261 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) [2021-11-21 01:50:08,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:50:08,332 INFO L93 Difference]: Finished difference Result 49 states and 55 transitions. [2021-11-21 01:50:08,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 01:50:08,333 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 [2021-11-21 01:50:08,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:50:08,334 INFO L225 Difference]: With dead ends: 49 [2021-11-21 01:50:08,334 INFO L226 Difference]: Without dead ends: 49 [2021-11-21 01:50:08,335 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-11-21 01:50:08,336 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 [2021-11-21 01:50:08,336 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] [2021-11-21 01:50:08,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-11-21 01:50:08,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 33. [2021-11-21 01:50:08,341 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) [2021-11-21 01:50:08,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2021-11-21 01:50:08,342 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 10 [2021-11-21 01:50:08,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:50:08,342 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2021-11-21 01:50:08,342 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) [2021-11-21 01:50:08,343 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2021-11-21 01:50:08,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-21 01:50:08,343 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:50:08,343 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:50:08,356 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-21 01:50:08,554 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2021-11-21 01:50:08,773 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-21 01:50:08,953 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:50:08,953 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-21 01:50:08,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:50:08,955 INFO L85 PathProgramCache]: Analyzing trace with hash -1900556789, now seen corresponding path program 1 times [2021-11-21 01:50:08,955 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:50:08,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [279506039] [2021-11-21 01:50:08,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:50:08,955 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:50:08,961 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:50:08,962 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:50:08,964 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-21 01:50:09,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:50:09,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-21 01:50:09,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:50:09,063 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 [2021-11-21 01:50:09,252 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:50:09,252 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:50:09,848 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:50:09,848 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:50:09,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [279506039] [2021-11-21 01:50:09,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [279506039] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:50:09,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [502795683] [2021-11-21 01:50:09,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:50:09,849 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 01:50:09,849 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 01:50:09,850 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 01:50:09,881 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2021-11-21 01:50:09,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:50:09,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-21 01:50:09,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:50:09,995 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 [2021-11-21 01:50:10,178 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:50:10,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:50:10,398 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:50:10,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [502795683] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:50:10,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133261446] [2021-11-21 01:50:10,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:50:10,399 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:50:10,399 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:50:10,402 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:50:10,420 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-21 01:50:10,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:50:10,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-21 01:50:10,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:50:10,467 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 [2021-11-21 01:50:10,574 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:50:10,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:50:10,813 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:50:10,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2133261446] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:50:10,814 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-21 01:50:10,814 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 12 [2021-11-21 01:50:10,815 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576128123] [2021-11-21 01:50:10,815 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-21 01:50:10,815 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-21 01:50:10,815 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:50:10,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-21 01:50:10,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-11-21 01:50:10,817 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 13 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:50:11,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:50:11,150 INFO L93 Difference]: Finished difference Result 57 states and 65 transitions. [2021-11-21 01:50:11,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-21 01:50:11,152 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-21 01:50:11,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:50:11,153 INFO L225 Difference]: With dead ends: 57 [2021-11-21 01:50:11,153 INFO L226 Difference]: Without dead ends: 57 [2021-11-21 01:50:11,153 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-11-21 01:50:11,154 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 152 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 5 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-21 01:50:11,155 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 65 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 58 Invalid, 0 Unknown, 5 Unchecked, 0.3s Time] [2021-11-21 01:50:11,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-11-21 01:50:11,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 41. [2021-11-21 01:50:11,159 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) [2021-11-21 01:50:11,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2021-11-21 01:50:11,161 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 10 [2021-11-21 01:50:11,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:50:11,161 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2021-11-21 01:50:11,161 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:50:11,161 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2021-11-21 01:50:11,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-21 01:50:11,162 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:50:11,162 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:50:11,190 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 0 [2021-11-21 01:50:11,385 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-21 01:50:11,571 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-21 01:50:11,765 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:50:11,765 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)] === [2021-11-21 01:50:11,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:50:11,765 INFO L85 PathProgramCache]: Analyzing trace with hash -1604227594, now seen corresponding path program 1 times [2021-11-21 01:50:11,766 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:50:11,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1095102932] [2021-11-21 01:50:11,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:50:11,766 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:50:11,766 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:50:11,767 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:50:11,768 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-21 01:50:11,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:50:11,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-21 01:50:11,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:50:11,866 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 01:50:11,866 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:50:11,927 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 01:50:11,927 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:50:11,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1095102932] [2021-11-21 01:50:11,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1095102932] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 01:50:11,928 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:50:11,928 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-21 01:50:11,928 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205948757] [2021-11-21 01:50:11,928 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 01:50:11,929 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 01:50:11,929 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:50:11,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 01:50:11,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-21 01:50:11,930 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) [2021-11-21 01:50:12,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:50:12,076 INFO L93 Difference]: Finished difference Result 64 states and 71 transitions. [2021-11-21 01:50:12,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-21 01:50:12,078 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 [2021-11-21 01:50:12,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:50:12,078 INFO L225 Difference]: With dead ends: 64 [2021-11-21 01:50:12,079 INFO L226 Difference]: Without dead ends: 64 [2021-11-21 01:50:12,079 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 [2021-11-21 01:50:12,080 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 [2021-11-21 01:50:12,080 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] [2021-11-21 01:50:12,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-11-21 01:50:12,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 41. [2021-11-21 01:50:12,084 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) [2021-11-21 01:50:12,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 46 transitions. [2021-11-21 01:50:12,085 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 46 transitions. Word has length 14 [2021-11-21 01:50:12,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:50:12,089 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 46 transitions. [2021-11-21 01:50:12,089 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) [2021-11-21 01:50:12,090 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 46 transitions. [2021-11-21 01:50:12,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-21 01:50:12,091 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:50:12,091 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:50:12,105 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-21 01:50:12,301 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:50:12,301 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-21 01:50:12,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:50:12,301 INFO L85 PathProgramCache]: Analyzing trace with hash 265956368, now seen corresponding path program 1 times [2021-11-21 01:50:12,302 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:50:12,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [583633899] [2021-11-21 01:50:12,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:50:12,302 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:50:12,302 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:50:12,303 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:50:12,304 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-21 01:50:12,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:50:12,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-21 01:50:12,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:50:12,433 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 01:50:12,433 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:50:12,514 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 01:50:12,514 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:50:12,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [583633899] [2021-11-21 01:50:12,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [583633899] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:50:12,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2133823443] [2021-11-21 01:50:12,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:50:12,515 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 01:50:12,515 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 01:50:12,516 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 01:50:12,537 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2021-11-21 01:50:12,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:50:12,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-21 01:50:12,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:50:12,677 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 01:50:12,678 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:50:12,731 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 01:50:12,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2133823443] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:50:12,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112215753] [2021-11-21 01:50:12,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:50:12,732 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:50:12,733 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:50:12,734 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:50:12,758 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-21 01:50:12,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:50:12,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-21 01:50:12,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:50:12,860 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 01:50:12,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:50:12,905 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 01:50:12,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2112215753] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:50:12,906 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-21 01:50:12,906 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 8 [2021-11-21 01:50:12,906 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33510633] [2021-11-21 01:50:12,906 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-21 01:50:12,908 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-21 01:50:12,908 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:50:12,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-21 01:50:12,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-21 01:50:12,909 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) [2021-11-21 01:50:13,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:50:13,016 INFO L93 Difference]: Finished difference Result 55 states and 60 transitions. [2021-11-21 01:50:13,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 01:50:13,017 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 [2021-11-21 01:50:13,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:50:13,018 INFO L225 Difference]: With dead ends: 55 [2021-11-21 01:50:13,018 INFO L226 Difference]: Without dead ends: 55 [2021-11-21 01:50:13,018 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-11-21 01:50:13,019 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 47 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:50:13,020 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 69 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:50:13,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-11-21 01:50:13,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 51. [2021-11-21 01:50:13,024 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) [2021-11-21 01:50:13,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 57 transitions. [2021-11-21 01:50:13,025 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 57 transitions. Word has length 16 [2021-11-21 01:50:13,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:50:13,025 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 57 transitions. [2021-11-21 01:50:13,025 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) [2021-11-21 01:50:13,025 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 57 transitions. [2021-11-21 01:50:13,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-21 01:50:13,026 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:50:13,026 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:50:13,040 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-21 01:50:13,246 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-21 01:50:13,431 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (14)] Ended with exit code 0 [2021-11-21 01:50:13,627 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt [2021-11-21 01:50:13,627 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-21 01:50:13,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:50:13,627 INFO L85 PathProgramCache]: Analyzing trace with hash -745160882, now seen corresponding path program 1 times [2021-11-21 01:50:13,628 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:50:13,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1664587006] [2021-11-21 01:50:13,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:50:13,628 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:50:13,628 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:50:13,629 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:50:13,641 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-21 01:50:13,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:50:13,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-21 01:50:13,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:50:13,713 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 [2021-11-21 01:50:14,026 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 01:50:14,026 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:50:14,857 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 01:50:14,857 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:50:14,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1664587006] [2021-11-21 01:50:14,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1664587006] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:50:14,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [346996419] [2021-11-21 01:50:14,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:50:14,858 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 01:50:14,858 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 01:50:14,859 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 01:50:14,897 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-21 01:50:14,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:50:14,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-21 01:50:14,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:50:15,303 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:50:15,303 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:50:15,639 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:50:15,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [346996419] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:50:15,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046232527] [2021-11-21 01:50:15,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:50:15,640 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:50:15,640 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:50:15,645 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:50:15,647 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-21 01:50:15,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:50:15,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-21 01:50:15,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:50:15,794 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:50:15,794 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:50:15,870 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:50:15,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2046232527] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:50:15,870 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-21 01:50:15,870 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 8, 7, 8, 7] total 23 [2021-11-21 01:50:15,871 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767934815] [2021-11-21 01:50:15,871 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-21 01:50:15,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-21 01:50:15,871 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:50:15,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-21 01:50:15,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-11-21 01:50:15,873 INFO L87 Difference]: Start difference. First operand 51 states and 57 transitions. Second operand has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 23 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) [2021-11-21 01:50:17,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:50:17,583 INFO L93 Difference]: Finished difference Result 87 states and 96 transitions. [2021-11-21 01:50:17,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-21 01:50:17,585 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 23 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-11-21 01:50:17,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:50:17,586 INFO L225 Difference]: With dead ends: 87 [2021-11-21 01:50:17,586 INFO L226 Difference]: Without dead ends: 87 [2021-11-21 01:50:17,587 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=275, Invalid=1057, Unknown=0, NotChecked=0, Total=1332 [2021-11-21 01:50:17,587 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 231 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 20 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-21 01:50:17,588 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [231 Valid, 160 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 185 Invalid, 0 Unknown, 20 Unchecked, 0.6s Time] [2021-11-21 01:50:17,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-11-21 01:50:17,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 67. [2021-11-21 01:50:17,593 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) [2021-11-21 01:50:17,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 77 transitions. [2021-11-21 01:50:17,594 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 77 transitions. Word has length 16 [2021-11-21 01:50:17,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:50:17,594 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 77 transitions. [2021-11-21 01:50:17,594 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 23 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) [2021-11-21 01:50:17,595 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 77 transitions. [2021-11-21 01:50:17,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-21 01:50:17,595 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:50:17,595 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:50:17,635 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-21 01:50:17,816 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-21 01:50:18,011 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2021-11-21 01:50:18,210 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt [2021-11-21 01:50:18,210 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)] === [2021-11-21 01:50:18,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:50:18,210 INFO L85 PathProgramCache]: Analyzing trace with hash -2114005431, now seen corresponding path program 1 times [2021-11-21 01:50:18,210 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:50:18,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2050538439] [2021-11-21 01:50:18,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:50:18,211 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:50:18,211 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:50:18,211 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:50:18,214 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-21 01:50:18,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:50:18,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-21 01:50:18,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:50:18,386 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 01:50:18,386 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:50:24,511 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 01:50:24,511 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:50:24,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2050538439] [2021-11-21 01:50:24,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2050538439] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 01:50:24,512 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:50:24,512 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-21 01:50:24,512 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212619512] [2021-11-21 01:50:24,512 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 01:50:24,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-21 01:50:24,513 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:50:24,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-21 01:50:24,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=24, Unknown=3, NotChecked=0, Total=42 [2021-11-21 01:50:24,513 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) [2021-11-21 01:50:24,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:50:24,579 INFO L93 Difference]: Finished difference Result 66 states and 76 transitions. [2021-11-21 01:50:24,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 01:50:24,579 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 [2021-11-21 01:50:24,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:50:24,580 INFO L225 Difference]: With dead ends: 66 [2021-11-21 01:50:24,580 INFO L226 Difference]: Without dead ends: 47 [2021-11-21 01:50:24,580 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 [2021-11-21 01:50:24,581 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 15 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 14 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:50:24,581 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 68 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 14 Unchecked, 0.1s Time] [2021-11-21 01:50:24,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-11-21 01:50:24,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2021-11-21 01:50:24,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 45 states have (on average 1.1555555555555554) internal successors, (52), 46 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:50:24,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 52 transitions. [2021-11-21 01:50:24,585 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 52 transitions. Word has length 18 [2021-11-21 01:50:24,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:50:24,585 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 52 transitions. [2021-11-21 01:50:24,586 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) [2021-11-21 01:50:24,586 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 52 transitions. [2021-11-21 01:50:24,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-21 01:50:24,586 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:50:24,586 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1] [2021-11-21 01:50:24,595 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-21 01:50:24,787 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:50:24,787 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-21 01:50:24,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:50:24,788 INFO L85 PathProgramCache]: Analyzing trace with hash -1817992175, now seen corresponding path program 2 times [2021-11-21 01:50:24,788 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:50:24,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1045271892] [2021-11-21 01:50:24,788 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-21 01:50:24,788 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:50:24,788 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:50:24,789 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:50:24,794 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-21 01:50:24,834 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-21 01:50:24,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:50:24,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-21 01:50:24,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:50:24,862 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 [2021-11-21 01:50:25,294 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:50:25,294 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:50:26,458 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:50:26,458 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:50:26,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1045271892] [2021-11-21 01:50:26,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1045271892] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:50:26,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [524587216] [2021-11-21 01:50:26,459 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-21 01:50:26,459 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 01:50:26,459 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 01:50:26,466 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 01:50:26,470 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2021-11-21 01:50:26,562 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-21 01:50:26,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:50:26,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-21 01:50:26,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:50:26,648 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 [2021-11-21 01:50:27,024 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:50:27,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:50:27,510 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:50:27,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [524587216] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:50:27,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634878111] [2021-11-21 01:50:27,510 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-21 01:50:27,511 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:50:27,511 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:50:27,524 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:50:27,532 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-21 01:50:27,590 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-21 01:50:27,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:50:27,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-21 01:50:27,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:50:27,615 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 [2021-11-21 01:50:27,964 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:50:27,964 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:50:29,208 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:50:29,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1634878111] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:50:29,208 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-21 01:50:29,208 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 8, 8] total 24 [2021-11-21 01:50:29,208 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132627130] [2021-11-21 01:50:29,209 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-21 01:50:29,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-21 01:50:29,209 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:50:29,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-21 01:50:29,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=425, Unknown=0, NotChecked=0, Total=600 [2021-11-21 01:50:29,210 INFO L87 Difference]: Start difference. First operand 47 states and 52 transitions. Second operand has 25 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 25 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:50:31,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:50:31,998 INFO L93 Difference]: Finished difference Result 177 states and 198 transitions. [2021-11-21 01:50:31,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-21 01:50:31,999 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 25 states have internal predecessors, (65), 0 states have call successors, (0), 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 [2021-11-21 01:50:31,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:50:32,000 INFO L225 Difference]: With dead ends: 177 [2021-11-21 01:50:32,000 INFO L226 Difference]: Without dead ends: 177 [2021-11-21 01:50:32,001 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 362 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=313, Invalid=743, Unknown=0, NotChecked=0, Total=1056 [2021-11-21 01:50:32,002 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 199 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-21 01:50:32,002 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 192 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 225 Invalid, 0 Unknown, 44 Unchecked, 1.3s Time] [2021-11-21 01:50:32,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-11-21 01:50:32,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 63. [2021-11-21 01:50:32,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 61 states have (on average 1.180327868852459) internal successors, (72), 62 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:50:32,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 72 transitions. [2021-11-21 01:50:32,009 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 72 transitions. Word has length 18 [2021-11-21 01:50:32,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:50:32,009 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 72 transitions. [2021-11-21 01:50:32,009 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 25 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:50:32,010 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 72 transitions. [2021-11-21 01:50:32,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-21 01:50:32,011 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:50:32,011 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:50:32,022 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-21 01:50:32,223 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (21)] Forceful destruction successful, exit code 0 [2021-11-21 01:50:32,442 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2021-11-21 01:50:32,622 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:50:32,622 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-21 01:50:32,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:50:32,623 INFO L85 PathProgramCache]: Analyzing trace with hash 1755727223, now seen corresponding path program 2 times [2021-11-21 01:50:32,623 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:50:32,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1816221758] [2021-11-21 01:50:32,623 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-21 01:50:32,623 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:50:32,624 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:50:32,625 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:50:32,628 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-21 01:50:32,701 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-21 01:50:32,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:50:32,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-21 01:50:32,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:50:32,734 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 [2021-11-21 01:50:33,415 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:50:33,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:50:36,241 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:50:36,241 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:50:36,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1816221758] [2021-11-21 01:50:36,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1816221758] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:50:36,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [481636613] [2021-11-21 01:50:36,242 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-21 01:50:36,242 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 01:50:36,242 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 01:50:36,243 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 01:50:36,244 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2021-11-21 01:50:36,363 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-21 01:50:36,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:50:36,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-21 01:50:36,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:50:37,268 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 11 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 01:50:37,268 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:50:38,316 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 11 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 01:50:38,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [481636613] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:50:38,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907581622] [2021-11-21 01:50:38,317 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-21 01:50:38,317 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:50:38,317 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:50:38,334 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:50:38,335 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-21 01:50:38,401 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-21 01:50:38,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:50:38,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-21 01:50:38,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:50:38,596 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 11 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 01:50:38,596 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:50:38,814 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 11 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 01:50:38,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1907581622] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:50:38,815 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-21 01:50:38,815 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 11, 10, 11, 10] total 38 [2021-11-21 01:50:38,815 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776663318] [2021-11-21 01:50:38,815 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-21 01:50:38,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-11-21 01:50:38,816 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:50:38,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-11-21 01:50:38,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=1249, Unknown=0, NotChecked=0, Total=1406 [2021-11-21 01:50:38,818 INFO L87 Difference]: Start difference. First operand 63 states and 72 transitions. Second operand has 38 states, 38 states have (on average 2.526315789473684) internal successors, (96), 38 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:50:40,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:50:40,174 INFO L93 Difference]: Finished difference Result 75 states and 85 transitions. [2021-11-21 01:50:40,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-21 01:50:40,176 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.526315789473684) internal successors, (96), 38 states have internal predecessors, (96), 0 states have call successors, (0), 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 [2021-11-21 01:50:40,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:50:40,178 INFO L225 Difference]: With dead ends: 75 [2021-11-21 01:50:40,178 INFO L226 Difference]: Without dead ends: 73 [2021-11-21 01:50:40,179 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 501 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=256, Invalid=1906, Unknown=0, NotChecked=0, Total=2162 [2021-11-21 01:50:40,180 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 56 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 21 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-21 01:50:40,181 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 217 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 192 Invalid, 0 Unknown, 21 Unchecked, 0.4s Time] [2021-11-21 01:50:40,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-11-21 01:50:40,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 71. [2021-11-21 01:50:40,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 69 states have (on average 1.173913043478261) internal successors, (81), 70 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:50:40,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 81 transitions. [2021-11-21 01:50:40,187 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 81 transitions. Word has length 28 [2021-11-21 01:50:40,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:50:40,187 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 81 transitions. [2021-11-21 01:50:40,187 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.526315789473684) internal successors, (96), 38 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:50:40,188 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 81 transitions. [2021-11-21 01:50:40,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-21 01:50:40,189 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:50:40,189 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:50:40,223 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2021-11-21 01:50:40,407 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (24)] Forceful destruction successful, exit code 0 [2021-11-21 01:50:40,612 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-21 01:50:40,806 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:50:40,806 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-21 01:50:40,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:50:40,806 INFO L85 PathProgramCache]: Analyzing trace with hash 1191228026, now seen corresponding path program 3 times [2021-11-21 01:50:40,807 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:50:40,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2047178882] [2021-11-21 01:50:40,807 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 01:50:40,807 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:50:40,807 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:50:40,807 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:50:40,808 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-21 01:50:40,907 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-21 01:50:40,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:50:40,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-21 01:50:40,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:50:40,939 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 [2021-11-21 01:50:41,572 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-21 01:50:41,572 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:50:43,519 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-21 01:50:43,520 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:50:43,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2047178882] [2021-11-21 01:50:43,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2047178882] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:50:43,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [606446973] [2021-11-21 01:50:43,520 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 01:50:43,520 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 01:50:43,521 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 01:50:43,525 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 01:50:43,540 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2021-11-21 01:50:43,741 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-21 01:50:43,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:50:43,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-21 01:50:43,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:50:43,765 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 [2021-11-21 01:50:44,763 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 [2021-11-21 01:50:44,904 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 3 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:50:44,904 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:50:48,861 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 3 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:50:48,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [606446973] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:50:48,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811080013] [2021-11-21 01:50:48,861 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 01:50:48,861 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:50:48,862 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:50:48,863 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:50:48,864 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-11-21 01:50:48,967 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-21 01:50:48,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:50:48,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-21 01:50:48,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:50:48,995 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 [2021-11-21 01:50:49,520 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 3 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:50:49,521 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:50:54,728 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:50:54,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1811080013] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:50:54,728 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-21 01:50:54,729 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 14, 14, 13, 13] total 51 [2021-11-21 01:50:54,729 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570079578] [2021-11-21 01:50:54,729 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-21 01:50:54,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-11-21 01:50:54,730 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:50:54,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-11-21 01:50:54,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=363, Invalid=2187, Unknown=0, NotChecked=0, Total=2550 [2021-11-21 01:50:54,732 INFO L87 Difference]: Start difference. First operand 71 states and 81 transitions. Second operand has 51 states, 51 states have (on average 2.607843137254902) internal successors, (133), 51 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:51:12,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:51:12,018 INFO L93 Difference]: Finished difference Result 160 states and 179 transitions. [2021-11-21 01:51:12,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-11-21 01:51:12,019 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.607843137254902) internal successors, (133), 51 states have internal predecessors, (133), 0 states have call successors, (0), 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 32 [2021-11-21 01:51:12,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:51:12,020 INFO L225 Difference]: With dead ends: 160 [2021-11-21 01:51:12,020 INFO L226 Difference]: Without dead ends: 102 [2021-11-21 01:51:12,022 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1701 ImplicationChecksByTransitivity, 20.5s TimeCoverageRelationStatistics Valid=1302, Invalid=5178, Unknown=0, NotChecked=0, Total=6480 [2021-11-21 01:51:12,022 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 999 mSDsluCounter, 540 mSDsCounter, 0 mSdLazyCounter, 871 mSolverCounterSat, 158 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 999 SdHoareTripleChecker+Valid, 572 SdHoareTripleChecker+Invalid, 1080 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 158 IncrementalHoareTripleChecker+Valid, 871 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 51 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:51:12,023 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [999 Valid, 572 Invalid, 1080 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [158 Valid, 871 Invalid, 0 Unknown, 51 Unchecked, 5.0s Time] [2021-11-21 01:51:12,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-11-21 01:51:12,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 95. [2021-11-21 01:51:12,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 93 states have (on average 1.1397849462365592) internal successors, (106), 94 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:51:12,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 106 transitions. [2021-11-21 01:51:12,028 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 106 transitions. Word has length 32 [2021-11-21 01:51:12,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:51:12,028 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 106 transitions. [2021-11-21 01:51:12,028 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.607843137254902) internal successors, (133), 51 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:51:12,029 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 106 transitions. [2021-11-21 01:51:12,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-21 01:51:12,030 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:51:12,030 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 1, 1, 1, 1, 1] [2021-11-21 01:51:12,040 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (27)] Forceful destruction successful, exit code 0 [2021-11-21 01:51:12,252 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2021-11-21 01:51:12,439 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-11-21 01:51:12,632 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:51:12,633 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-21 01:51:12,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:51:12,633 INFO L85 PathProgramCache]: Analyzing trace with hash -563143139, now seen corresponding path program 3 times [2021-11-21 01:51:12,633 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:51:12,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1823920668] [2021-11-21 01:51:12,633 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 01:51:12,634 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:51:12,634 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:51:12,634 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:51:12,636 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-21 01:51:12,737 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-21 01:51:12,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:51:12,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-21 01:51:12,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:51:12,774 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 [2021-11-21 01:51:13,489 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:51:13,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:51:15,721 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:51:15,721 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:51:15,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1823920668] [2021-11-21 01:51:15,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1823920668] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:51:15,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1779537243] [2021-11-21 01:51:15,722 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 01:51:15,722 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 01:51:15,722 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 01:51:15,723 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 01:51:15,724 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2021-11-21 01:51:15,948 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-21 01:51:15,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:51:15,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-21 01:51:15,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:51:16,060 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 [2021-11-21 01:51:16,975 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:51:16,975 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:51:25,311 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:51:25,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1779537243] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:51:25,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145177944] [2021-11-21 01:51:25,311 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 01:51:25,312 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:51:25,312 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:51:25,314 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:51:25,315 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-11-21 01:51:26,088 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-21 01:51:26,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:51:26,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-21 01:51:26,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:51:26,108 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 [2021-11-21 01:51:27,161 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:51:27,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:51:32,921 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:51:32,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1145177944] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:51:32,921 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-21 01:51:32,921 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 13, 15, 14, 14] total 54 [2021-11-21 01:51:32,921 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991640562] [2021-11-21 01:51:32,922 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-21 01:51:32,922 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-11-21 01:51:32,922 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:51:32,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-11-21 01:51:32,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=818, Invalid=2152, Unknown=0, NotChecked=0, Total=2970 [2021-11-21 01:51:32,924 INFO L87 Difference]: Start difference. First operand 95 states and 106 transitions. Second operand has 55 states, 54 states have (on average 2.9444444444444446) internal successors, (159), 55 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:51:36,412 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:51:38,420 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:51:40,488 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:51:42,173 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.68s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:51:47,685 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:51:48,987 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:51:50,990 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:51:52,993 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:51:57,420 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:51:59,443 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:52:00,609 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:52:04,420 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:52:11,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:52:11,094 INFO L93 Difference]: Finished difference Result 727 states and 816 transitions. [2021-11-21 01:52:11,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-11-21 01:52:11,096 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 54 states have (on average 2.9444444444444446) internal successors, (159), 55 states have internal predecessors, (159), 0 states have call successors, (0), 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 [2021-11-21 01:52:11,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:52:11,100 INFO L225 Difference]: With dead ends: 727 [2021-11-21 01:52:11,100 INFO L226 Difference]: Without dead ends: 727 [2021-11-21 01:52:11,102 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 146 SyntacticMatches, 5 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2690 ImplicationChecksByTransitivity, 24.8s TimeCoverageRelationStatistics Valid=1722, Invalid=4130, Unknown=0, NotChecked=0, Total=5852 [2021-11-21 01:52:11,103 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 1126 mSDsluCounter, 587 mSDsCounter, 0 mSdLazyCounter, 847 mSolverCounterSat, 74 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 23.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1126 SdHoareTripleChecker+Valid, 622 SdHoareTripleChecker+Invalid, 984 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 847 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 57 IncrementalHoareTripleChecker+Unchecked, 23.8s IncrementalHoareTripleChecker+Time [2021-11-21 01:52:11,103 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1126 Valid, 622 Invalid, 984 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 847 Invalid, 6 Unknown, 57 Unchecked, 23.8s Time] [2021-11-21 01:52:11,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 727 states. [2021-11-21 01:52:11,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 727 to 127. [2021-11-21 01:52:11,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 125 states have (on average 1.168) internal successors, (146), 126 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:52:11,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 146 transitions. [2021-11-21 01:52:11,114 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 146 transitions. Word has length 34 [2021-11-21 01:52:11,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:52:11,115 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 146 transitions. [2021-11-21 01:52:11,115 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 54 states have (on average 2.9444444444444446) internal successors, (159), 55 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:52:11,115 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 146 transitions. [2021-11-21 01:52:11,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-21 01:52:11,117 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:52:11,117 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:52:11,146 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-11-21 01:52:11,340 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (29)] Ended with exit code 0 [2021-11-21 01:52:11,535 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (30)] Ended with exit code 0 [2021-11-21 01:52:11,734 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt [2021-11-21 01:52:11,734 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-21 01:52:11,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:52:11,734 INFO L85 PathProgramCache]: Analyzing trace with hash 368894281, now seen corresponding path program 4 times [2021-11-21 01:52:11,735 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:52:11,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1640529282] [2021-11-21 01:52:11,735 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-21 01:52:11,735 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:52:11,735 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:52:11,736 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:52:11,777 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-11-21 01:52:11,865 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-21 01:52:11,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:52:11,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-21 01:52:11,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:52:11,892 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 [2021-11-21 01:52:12,913 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 44 proven. 78 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-21 01:52:12,913 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:52:19,783 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:52:19,783 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:52:19,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1640529282] [2021-11-21 01:52:19,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1640529282] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:52:19,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1074729331] [2021-11-21 01:52:19,784 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-21 01:52:19,784 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 01:52:19,784 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 01:52:19,788 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 01:52:19,790 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (33)] Waiting until timeout for monitored process [2021-11-21 01:52:19,920 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-21 01:52:19,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:52:19,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-21 01:52:19,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:52:21,667 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 55 proven. 56 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-21 01:52:21,667 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:52:24,183 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 55 proven. 56 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-21 01:52:24,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1074729331] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:52:24,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863649066] [2021-11-21 01:52:24,184 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-21 01:52:24,184 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:52:24,184 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:52:24,185 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:52:24,186 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-11-21 01:52:24,265 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-21 01:52:24,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:52:24,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-21 01:52:24,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:52:24,302 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 [2021-11-21 01:52:26,035 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 [2021-11-21 01:52:26,111 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 55 proven. 56 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-21 01:52:26,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:52:30,613 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 55 proven. 56 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-21 01:52:30,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [863649066] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:52:30,613 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-21 01:52:30,613 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18, 15, 14, 17, 16] total 76 [2021-11-21 01:52:30,614 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92799407] [2021-11-21 01:52:30,614 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-21 01:52:30,615 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2021-11-21 01:52:30,615 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:52:30,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2021-11-21 01:52:30,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=543, Invalid=5157, Unknown=0, NotChecked=0, Total=5700 [2021-11-21 01:52:30,617 INFO L87 Difference]: Start difference. First operand 127 states and 146 transitions. Second operand has 76 states, 76 states have (on average 2.8947368421052633) internal successors, (220), 76 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:52:49,782 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:53:07,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:53:07,513 INFO L93 Difference]: Finished difference Result 244 states and 274 transitions. [2021-11-21 01:53:07,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-11-21 01:53:07,516 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 2.8947368421052633) internal successors, (220), 76 states have internal predecessors, (220), 0 states have call successors, (0), 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 52 [2021-11-21 01:53:07,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:53:07,517 INFO L225 Difference]: With dead ends: 244 [2021-11-21 01:53:07,517 INFO L226 Difference]: Without dead ends: 210 [2021-11-21 01:53:07,520 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 233 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2501 ImplicationChecksByTransitivity, 40.6s TimeCoverageRelationStatistics Valid=1421, Invalid=9291, Unknown=0, NotChecked=0, Total=10712 [2021-11-21 01:53:07,521 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 924 mSDsluCounter, 809 mSDsCounter, 0 mSdLazyCounter, 1423 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 924 SdHoareTripleChecker+Valid, 834 SdHoareTripleChecker+Invalid, 1813 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 1423 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 230 IncrementalHoareTripleChecker+Unchecked, 10.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:53:07,521 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [924 Valid, 834 Invalid, 1813 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 1423 Invalid, 0 Unknown, 230 Unchecked, 10.1s Time] [2021-11-21 01:53:07,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-11-21 01:53:07,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 136. [2021-11-21 01:53:07,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 134 states have (on average 1.1567164179104477) internal successors, (155), 135 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:53:07,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 155 transitions. [2021-11-21 01:53:07,528 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 155 transitions. Word has length 52 [2021-11-21 01:53:07,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:53:07,528 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 155 transitions. [2021-11-21 01:53:07,528 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 2.8947368421052633) internal successors, (220), 76 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:53:07,529 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 155 transitions. [2021-11-21 01:53:07,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-21 01:53:07,532 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:53:07,532 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:53:07,540 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (33)] Forceful destruction successful, exit code 0 [2021-11-21 01:53:07,756 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2021-11-21 01:53:07,942 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2021-11-21 01:53:08,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:53:08,135 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-21 01:53:08,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:53:08,136 INFO L85 PathProgramCache]: Analyzing trace with hash -683290673, now seen corresponding path program 5 times [2021-11-21 01:53:08,136 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:53:08,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2112779743] [2021-11-21 01:53:08,136 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-21 01:53:08,136 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:53:08,136 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:53:08,137 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:53:08,138 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2021-11-21 01:53:08,566 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-11-21 01:53:08,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:53:08,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-21 01:53:08,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:53:08,612 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 [2021-11-21 01:53:10,077 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 26 proven. 138 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:53:10,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:53:17,044 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 164 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:53:17,045 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:53:17,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2112779743] [2021-11-21 01:53:17,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2112779743] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:53:17,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1480047361] [2021-11-21 01:53:17,045 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-21 01:53:17,045 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 01:53:17,045 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 01:53:17,046 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 01:53:17,047 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (36)] Waiting until timeout for monitored process [2021-11-21 01:55:50,140 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-11-21 01:55:50,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:55:50,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-21 01:55:50,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:55:52,818 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 31 proven. 132 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 01:55:52,818 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:55:56,232 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 31 proven. 132 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 01:55:56,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1480047361] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:55:56,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426779375] [2021-11-21 01:55:56,232 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-21 01:55:56,232 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:55:56,233 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:55:56,234 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:55:56,234 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-11-21 01:56:06,290 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-11-21 01:56:06,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:56:06,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-21 01:56:06,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:56:06,326 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 [2021-11-21 01:56:08,660 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 22 treesize of output 16 [2021-11-21 01:56:08,848 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 31 proven. 132 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 01:56:08,849 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:56:17,667 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 31 proven. 132 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 01:56:17,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [426779375] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:56:17,668 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-21 01:56:17,668 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20, 20, 18, 22, 21] total 97 [2021-11-21 01:56:17,668 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231034297] [2021-11-21 01:56:17,668 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-21 01:56:17,669 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2021-11-21 01:56:17,669 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:56:17,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2021-11-21 01:56:17,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=877, Invalid=8435, Unknown=0, NotChecked=0, Total=9312 [2021-11-21 01:56:17,674 INFO L87 Difference]: Start difference. First operand 136 states and 155 transitions. Second operand has 97 states, 97 states have (on average 3.082474226804124) internal successors, (299), 97 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:57:38,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:57:38,951 INFO L93 Difference]: Finished difference Result 379 states and 422 transitions. [2021-11-21 01:57:38,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-11-21 01:57:38,954 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 3.082474226804124) internal successors, (299), 97 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-11-21 01:57:38,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:57:38,955 INFO L225 Difference]: With dead ends: 379 [2021-11-21 01:57:38,956 INFO L226 Difference]: Without dead ends: 277 [2021-11-21 01:57:38,960 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 417 GetRequests, 261 SyntacticMatches, 3 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6301 ImplicationChecksByTransitivity, 85.3s TimeCoverageRelationStatistics Valid=3432, Invalid=20438, Unknown=0, NotChecked=0, Total=23870 [2021-11-21 01:57:38,961 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 1697 mSDsluCounter, 1825 mSDsCounter, 0 mSdLazyCounter, 2777 mSolverCounterSat, 346 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1697 SdHoareTripleChecker+Valid, 1883 SdHoareTripleChecker+Invalid, 3693 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 346 IncrementalHoareTripleChecker+Valid, 2777 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 570 IncrementalHoareTripleChecker+Unchecked, 15.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:57:38,961 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1697 Valid, 1883 Invalid, 3693 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [346 Valid, 2777 Invalid, 0 Unknown, 570 Unchecked, 15.1s Time] [2021-11-21 01:57:38,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2021-11-21 01:57:38,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 136. [2021-11-21 01:57:38,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 134 states have (on average 1.1417910447761195) internal successors, (153), 135 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:57:38,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 153 transitions. [2021-11-21 01:57:38,966 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 153 transitions. Word has length 60 [2021-11-21 01:57:38,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:57:38,966 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 153 transitions. [2021-11-21 01:57:38,966 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 3.082474226804124) internal successors, (299), 97 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:57:38,967 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 153 transitions. [2021-11-21 01:57:38,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-21 01:57:38,969 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:57:38,969 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:57:38,987 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2021-11-21 01:57:39,209 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (36)] Ended with exit code 0 [2021-11-21 01:57:39,408 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-11-21 01:57:39,585 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:57:39,585 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-21 01:57:39,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:57:39,585 INFO L85 PathProgramCache]: Analyzing trace with hash 573796562, now seen corresponding path program 6 times [2021-11-21 01:57:39,585 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:57:39,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [359170850] [2021-11-21 01:57:39,586 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-21 01:57:39,586 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:57:39,586 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:57:39,587 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:57:39,589 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2021-11-21 01:57:39,845 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-11-21 01:57:39,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:57:39,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-21 01:57:39,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:57:39,873 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 [2021-11-21 01:57:41,203 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-11-21 01:57:41,203 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:57:48,474 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-11-21 01:57:48,474 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:57:48,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [359170850] [2021-11-21 01:57:48,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [359170850] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:57:48,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1845831391] [2021-11-21 01:57:48,475 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-21 01:57:48,475 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 01:57:48,475 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 01:57:48,475 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 01:57:48,477 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (39)] Waiting until timeout for monitored process [2021-11-21 01:57:50,521 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-11-21 01:57:50,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:57:50,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-21 01:57:50,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:57:50,549 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 [2021-11-21 01:57:51,779 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-11-21 01:57:51,779 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:58:02,166 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-11-21 01:58:02,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1845831391] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:58:02,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593991600] [2021-11-21 01:58:02,167 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-21 01:58:02,167 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:58:02,167 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:58:02,167 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:58:02,168 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-11-21 01:58:04,065 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-11-21 01:58:04,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:58:04,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-21 01:58:04,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:58:04,089 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 [2021-11-21 01:58:07,444 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 [2021-11-21 01:58:07,902 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 7 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:58:07,903 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:58:24,093 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 7 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:58:24,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [593991600] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:58:24,094 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-21 01:58:24,094 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15, 17, 22, 23] total 83 [2021-11-21 01:58:24,094 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998432149] [2021-11-21 01:58:24,094 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-21 01:58:24,095 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2021-11-21 01:58:24,095 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:58:24,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2021-11-21 01:58:24,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=859, Invalid=5947, Unknown=0, NotChecked=0, Total=6806 [2021-11-21 01:58:24,096 INFO L87 Difference]: Start difference. First operand 136 states and 153 transitions. Second operand has 83 states, 83 states have (on average 2.927710843373494) internal successors, (243), 83 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:58:53,341 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.45s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:58:54,461 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:58:56,539 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:58:58,579 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:59:11,135 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:59:12,329 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:59:14,444 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:59:16,506 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:59:22,749 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:59:25,437 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:59:27,477 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:59:29,582 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:59:31,620 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:59:36,726 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:59:41,397 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 [] [2021-11-21 01:59:46,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:59:46,905 INFO L93 Difference]: Finished difference Result 319 states and 357 transitions. [2021-11-21 01:59:46,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-11-21 01:59:46,907 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 2.927710843373494) internal successors, (243), 83 states have internal predecessors, (243), 0 states have call successors, (0), 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 [2021-11-21 01:59:46,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:59:46,908 INFO L225 Difference]: With dead ends: 319 [2021-11-21 01:59:46,909 INFO L226 Difference]: Without dead ends: 261 [2021-11-21 01:59:46,910 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 422 GetRequests, 295 SyntacticMatches, 3 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5087 ImplicationChecksByTransitivity, 70.0s TimeCoverageRelationStatistics Valid=2710, Invalid=13040, Unknown=0, NotChecked=0, Total=15750 [2021-11-21 01:59:46,910 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 2409 mSDsluCounter, 1292 mSDsCounter, 0 mSdLazyCounter, 2160 mSolverCounterSat, 322 mSolverCounterUnsat, 12 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 37.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2409 SdHoareTripleChecker+Valid, 1332 SdHoareTripleChecker+Invalid, 2594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 322 IncrementalHoareTripleChecker+Valid, 2160 IncrementalHoareTripleChecker+Invalid, 12 IncrementalHoareTripleChecker+Unknown, 100 IncrementalHoareTripleChecker+Unchecked, 38.8s IncrementalHoareTripleChecker+Time [2021-11-21 01:59:46,911 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2409 Valid, 1332 Invalid, 2594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [322 Valid, 2160 Invalid, 12 Unknown, 100 Unchecked, 38.8s Time] [2021-11-21 01:59:46,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2021-11-21 01:59:46,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 191. [2021-11-21 01:59:46,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 189 states have (on average 1.1322751322751323) internal successors, (214), 190 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:59:46,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 214 transitions. [2021-11-21 01:59:46,917 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 214 transitions. Word has length 64 [2021-11-21 01:59:46,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:59:46,917 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 214 transitions. [2021-11-21 01:59:46,918 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 2.927710843373494) internal successors, (243), 83 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:59:46,918 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 214 transitions. [2021-11-21 01:59:46,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-21 01:59:46,919 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:59:46,919 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 1, 1, 1, 1, 1] [2021-11-21 01:59:46,928 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (39)] Forceful destruction successful, exit code 0 [2021-11-21 01:59:47,132 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (38)] Forceful destruction successful, exit code 0 [2021-11-21 01:59:47,348 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2021-11-21 01:59:47,524 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:59:47,524 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-21 01:59:47,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:59:47,524 INFO L85 PathProgramCache]: Analyzing trace with hash 58542645, now seen corresponding path program 4 times [2021-11-21 01:59:47,525 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:59:47,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1004608825] [2021-11-21 01:59:47,525 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-21 01:59:47,525 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:59:47,525 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:59:47,546 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:59:47,576 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2021-11-21 01:59:47,679 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-21 01:59:47,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:59:47,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-21 01:59:47,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:59:47,712 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 [2021-11-21 01:59:49,505 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 0 proven. 450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:59:49,505 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 02:00:01,363 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 0 proven. 450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 02:00:01,363 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 02:00:01,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1004608825] [2021-11-21 02:00:01,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1004608825] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 02:00:01,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1350145029] [2021-11-21 02:00:01,364 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-21 02:00:01,364 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 02:00:01,364 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 02:00:01,365 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 02:00:01,367 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (42)] Waiting until timeout for monitored process [2021-11-21 02:00:01,574 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-21 02:00:01,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 02:00:01,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-21 02:00:01,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 02:00:01,592 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 [2021-11-21 02:00:03,109 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 0 proven. 450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 02:00:03,109 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 02:00:13,778 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 0 proven. 450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 02:00:13,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1350145029] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 02:00:13,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260021817] [2021-11-21 02:00:13,778 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-21 02:00:13,778 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 02:00:13,779 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 02:00:13,779 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 02:00:13,780 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-11-21 02:00:13,863 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-21 02:00:13,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 02:00:13,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-21 02:00:13,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 02:00:13,885 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 [2021-11-21 02:00:16,415 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 0 proven. 450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 02:00:16,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 02:00:38,103 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 0 proven. 450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 02:00:38,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [260021817] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 02:00:38,104 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-21 02:00:38,104 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 19, 19, 26, 26] total 105 [2021-11-21 02:00:38,104 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273107839] [2021-11-21 02:00:38,104 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-21 02:00:38,105 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 106 states [2021-11-21 02:00:38,105 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 02:00:38,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2021-11-21 02:00:38,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2920, Invalid=8210, Unknown=0, NotChecked=0, Total=11130 [2021-11-21 02:00:38,107 INFO L87 Difference]: Start difference. First operand 191 states and 214 transitions. Second operand has 106 states, 105 states have (on average 3.104761904761905) internal successors, (326), 106 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 02:00:49,327 WARN L227 SmtUtils]: Spent 6.70s 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) [2021-11-21 02:00:51,443 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 [] [2021-11-21 02:00:53,446 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 02:00:55,542 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 02:00:57,545 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 02:00:59,548 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 02:01:01,551 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 02:01:03,553 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 02:01:05,556 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 02:01:11,517 WARN L227 SmtUtils]: Spent 5.47s on a formula simplification that was a NOOP. DAG size: 154 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-21 02:01:17,970 WARN L227 SmtUtils]: Spent 5.82s on a formula simplification that was a NOOP. DAG size: 150 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-21 02:01:20,277 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 02:01:22,325 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 02:01:24,412 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 02:01:26,415 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 02:01:28,419 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 02:01:30,424 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 02:01:32,427 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 02:01:34,430 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 02:01:47,193 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 02:01:49,196 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 02:01:51,231 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 02:01:53,234 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 02:01:55,238 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 02:01:57,241 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 02:01:59,245 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 02:02:05,148 WARN L227 SmtUtils]: Spent 5.19s on a formula simplification that was a NOOP. DAG size: 134 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-21 02:02:11,620 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 02:02:13,623 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 02:02:15,626 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 02:02:17,629 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 02:02:19,632 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 02:02:21,691 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 02:02:23,694 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 02:02:35,960 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 02:02:37,964 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 02:02:39,968 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 02:02:41,971 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 02:02:43,974 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 02:02:45,986 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 02:02:56,519 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 02:02:58,523 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 02:03:00,573 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 02:03:02,577 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 02:03:04,580 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 02:03:06,582 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 02:03:15,763 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 02:03:17,777 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 02:03:19,779 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 02:03:21,782 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 02:03:23,786 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 02:03:31,806 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 02:03:33,810 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 02:03:35,264 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.45s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 02:03:37,267 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 02:03:44,069 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 02:03:46,075 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 02:03:48,078 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 [] [2021-11-21 02:04:07,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 02:04:07,143 INFO L93 Difference]: Finished difference Result 2983 states and 3352 transitions. [2021-11-21 02:04:07,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-11-21 02:04:07,147 INFO L78 Accepts]: Start accepts. Automaton has has 106 states, 105 states have (on average 3.104761904761905) internal successors, (326), 106 states have internal predecessors, (326), 0 states have call successors, (0), 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 [2021-11-21 02:04:07,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 02:04:07,164 INFO L225 Difference]: With dead ends: 2983 [2021-11-21 02:04:07,165 INFO L226 Difference]: Without dead ends: 2983 [2021-11-21 02:04:07,167 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 438 GetRequests, 299 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8278 ImplicationChecksByTransitivity, 124.6s TimeCoverageRelationStatistics Valid=5451, Invalid=14289, Unknown=0, NotChecked=0, Total=19740 [2021-11-21 02:04:07,168 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 4760 mSDsluCounter, 1901 mSDsCounter, 0 mSdLazyCounter, 2930 mSolverCounterSat, 232 mSolverCounterUnsat, 53 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 119.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4760 SdHoareTripleChecker+Valid, 1968 SdHoareTripleChecker+Invalid, 3277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 232 IncrementalHoareTripleChecker+Valid, 2930 IncrementalHoareTripleChecker+Invalid, 53 IncrementalHoareTripleChecker+Unknown, 62 IncrementalHoareTripleChecker+Unchecked, 120.3s IncrementalHoareTripleChecker+Time [2021-11-21 02:04:07,168 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4760 Valid, 1968 Invalid, 3277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [232 Valid, 2930 Invalid, 53 Unknown, 62 Unchecked, 120.3s Time] [2021-11-21 02:04:07,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2983 states. [2021-11-21 02:04:07,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2983 to 255. [2021-11-21 02:04:07,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 253 states have (on average 1.1620553359683794) internal successors, (294), 254 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 02:04:07,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 294 transitions. [2021-11-21 02:04:07,198 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 294 transitions. Word has length 66 [2021-11-21 02:04:07,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 02:04:07,199 INFO L470 AbstractCegarLoop]: Abstraction has 255 states and 294 transitions. [2021-11-21 02:04:07,199 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 106 states, 105 states have (on average 3.104761904761905) internal successors, (326), 106 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 02:04:07,199 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 294 transitions. [2021-11-21 02:04:07,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-21 02:04:07,202 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 02:04:07,203 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 02:04:07,245 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2021-11-21 02:04:07,445 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (41)] Forceful destruction successful, exit code 0 [2021-11-21 02:04:07,628 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (42)] Forceful destruction successful, exit code 0 [2021-11-21 02:04:07,826 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt [2021-11-21 02:04:07,826 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-21 02:04:07,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 02:04:07,827 INFO L85 PathProgramCache]: Analyzing trace with hash -1586014483, now seen corresponding path program 7 times [2021-11-21 02:04:07,827 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 02:04:07,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1827386011] [2021-11-21 02:04:07,827 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-21 02:04:07,827 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 02:04:07,827 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 02:04:07,828 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 02:04:07,829 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283b9f58-814c-47ff-8af8-4d83fddf3c7a/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2021-11-21 02:04:07,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 02:04:08,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-21 02:04:08,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 02:04:08,049 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