./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/openbsd_cstrncat-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 678e0110 Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_2e59f848-c2b2-4584-aacd-f6a28869cd42/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_2e59f848-c2b2-4584-aacd-f6a28869cd42/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_2e59f848-c2b2-4584-aacd-f6a28869cd42/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_2e59f848-c2b2-4584-aacd-f6a28869cd42/bin/uautomizer/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/openbsd_cstrncat-alloca-2.i -s /tmp/vcloud-vcloud-master/worker/run_dir_2e59f848-c2b2-4584-aacd-f6a28869cd42/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_2e59f848-c2b2-4584-aacd-f6a28869cd42/bin/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash bea41ba7ef8afa8e6ccd1150cee95a00bf0377da ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: ERROR: ExceptionOrErrorResult: AssertionError: incompatible size --- Real Ultimate output --- Skipped default analysis because property is memsafety ### Bit-precise run ### This is Ultimate 0.1.24-678e011 [2019-11-19 23:21:45,213 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-19 23:21:45,215 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-19 23:21:45,233 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-19 23:21:45,234 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-19 23:21:45,236 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-19 23:21:45,238 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-19 23:21:45,250 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-19 23:21:45,255 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-19 23:21:45,258 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-19 23:21:45,259 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-19 23:21:45,261 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-19 23:21:45,261 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-19 23:21:45,266 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-19 23:21:45,268 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-19 23:21:45,270 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-19 23:21:45,271 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-19 23:21:45,276 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-19 23:21:45,279 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-19 23:21:45,284 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-19 23:21:45,290 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-19 23:21:45,293 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-19 23:21:45,297 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-19 23:21:45,298 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-19 23:21:45,302 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-19 23:21:45,302 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-19 23:21:45,303 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-19 23:21:45,306 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-19 23:21:45,306 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-19 23:21:45,307 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-19 23:21:45,308 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-19 23:21:45,309 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-19 23:21:45,310 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-19 23:21:45,311 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-19 23:21:45,313 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-19 23:21:45,313 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-19 23:21:45,314 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-19 23:21:45,315 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-19 23:21:45,315 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-19 23:21:45,316 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-19 23:21:45,318 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-19 23:21:45,319 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_2e59f848-c2b2-4584-aacd-f6a28869cd42/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2019-11-19 23:21:45,354 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-19 23:21:45,367 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-19 23:21:45,368 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-19 23:21:45,368 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-19 23:21:45,369 INFO L138 SettingsManager]: * Use SBE=true [2019-11-19 23:21:45,369 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-19 23:21:45,369 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-19 23:21:45,370 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-11-19 23:21:45,370 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-19 23:21:45,370 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-19 23:21:45,370 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-19 23:21:45,371 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2019-11-19 23:21:45,371 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2019-11-19 23:21:45,371 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2019-11-19 23:21:45,371 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-19 23:21:45,372 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2019-11-19 23:21:45,372 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2019-11-19 23:21:45,372 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-19 23:21:45,373 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-19 23:21:45,373 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-19 23:21:45,373 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-19 23:21:45,373 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-19 23:21:45,374 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-19 23:21:45,374 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-19 23:21:45,374 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-19 23:21:45,375 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-19 23:21:45,375 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2019-11-19 23:21:45,375 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2019-11-19 23:21:45,375 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-19 23:21:45,376 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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-vcloud-master/worker/run_dir_2e59f848-c2b2-4584-aacd-f6a28869cd42/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bea41ba7ef8afa8e6ccd1150cee95a00bf0377da [2019-11-19 23:21:45,551 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-19 23:21:45,573 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-19 23:21:45,579 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-19 23:21:45,581 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-19 23:21:45,582 INFO L275 PluginConnector]: CDTParser initialized [2019-11-19 23:21:45,583 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_2e59f848-c2b2-4584-aacd-f6a28869cd42/bin/uautomizer/../../sv-benchmarks/c/array-memsafety/openbsd_cstrncat-alloca-2.i [2019-11-19 23:21:45,673 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_2e59f848-c2b2-4584-aacd-f6a28869cd42/bin/uautomizer/data/d4af4f12a/d217a17651f64d15b982aacc275b7b18/FLAG0904749e9 [2019-11-19 23:21:46,209 INFO L306 CDTParser]: Found 1 translation units. [2019-11-19 23:21:46,210 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_2e59f848-c2b2-4584-aacd-f6a28869cd42/sv-benchmarks/c/array-memsafety/openbsd_cstrncat-alloca-2.i [2019-11-19 23:21:46,232 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_2e59f848-c2b2-4584-aacd-f6a28869cd42/bin/uautomizer/data/d4af4f12a/d217a17651f64d15b982aacc275b7b18/FLAG0904749e9 [2019-11-19 23:21:46,493 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_2e59f848-c2b2-4584-aacd-f6a28869cd42/bin/uautomizer/data/d4af4f12a/d217a17651f64d15b982aacc275b7b18 [2019-11-19 23:21:46,496 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-19 23:21:46,497 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-19 23:21:46,498 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-19 23:21:46,499 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-19 23:21:46,503 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-19 23:21:46,504 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 11:21:46" (1/1) ... [2019-11-19 23:21:46,507 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@18f97bab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 11:21:46, skipping insertion in model container [2019-11-19 23:21:46,507 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 11:21:46" (1/1) ... [2019-11-19 23:21:46,521 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-19 23:21:46,599 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-19 23:21:46,984 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-19 23:21:46,998 INFO L188 MainTranslator]: Completed pre-run [2019-11-19 23:21:47,052 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-19 23:21:47,112 INFO L192 MainTranslator]: Completed translation [2019-11-19 23:21:47,113 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 11:21:47 WrapperNode [2019-11-19 23:21:47,113 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-19 23:21:47,114 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-19 23:21:47,115 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-19 23:21:47,115 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-19 23:21:47,130 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 11:21:47" (1/1) ... [2019-11-19 23:21:47,131 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 11:21:47" (1/1) ... [2019-11-19 23:21:47,151 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 11:21:47" (1/1) ... [2019-11-19 23:21:47,152 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 11:21:47" (1/1) ... [2019-11-19 23:21:47,177 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 11:21:47" (1/1) ... [2019-11-19 23:21:47,182 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 11:21:47" (1/1) ... [2019-11-19 23:21:47,187 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 11:21:47" (1/1) ... [2019-11-19 23:21:47,195 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-19 23:21:47,195 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-19 23:21:47,195 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-19 23:21:47,196 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-19 23:21:47,197 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 11:21:47" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2e59f848-c2b2-4584-aacd-f6a28869cd42/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-19 23:21:47,263 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-19 23:21:47,263 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-19 23:21:47,263 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2019-11-19 23:21:47,265 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2019-11-19 23:21:47,265 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2019-11-19 23:21:47,265 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2019-11-19 23:21:47,265 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2019-11-19 23:21:47,266 INFO L138 BoogieDeclarations]: Found implementation of procedure cstrncat [2019-11-19 23:21:47,266 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-19 23:21:47,267 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2019-11-19 23:21:47,267 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2019-11-19 23:21:47,268 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2019-11-19 23:21:47,268 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2019-11-19 23:21:47,268 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2019-11-19 23:21:47,268 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2019-11-19 23:21:47,269 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2019-11-19 23:21:47,269 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2019-11-19 23:21:47,270 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2019-11-19 23:21:47,270 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2019-11-19 23:21:47,270 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2019-11-19 23:21:47,270 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2019-11-19 23:21:47,270 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2019-11-19 23:21:47,271 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2019-11-19 23:21:47,271 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2019-11-19 23:21:47,272 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2019-11-19 23:21:47,272 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2019-11-19 23:21:47,272 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2019-11-19 23:21:47,273 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2019-11-19 23:21:47,273 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2019-11-19 23:21:47,273 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2019-11-19 23:21:47,273 INFO L130 BoogieDeclarations]: Found specification of procedure select [2019-11-19 23:21:47,274 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2019-11-19 23:21:47,274 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2019-11-19 23:21:47,274 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2019-11-19 23:21:47,274 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2019-11-19 23:21:47,274 INFO L130 BoogieDeclarations]: Found specification of procedure random [2019-11-19 23:21:47,275 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2019-11-19 23:21:47,275 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2019-11-19 23:21:47,275 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2019-11-19 23:21:47,275 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2019-11-19 23:21:47,275 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2019-11-19 23:21:47,276 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2019-11-19 23:21:47,276 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2019-11-19 23:21:47,276 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2019-11-19 23:21:47,276 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2019-11-19 23:21:47,276 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2019-11-19 23:21:47,277 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2019-11-19 23:21:47,277 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2019-11-19 23:21:47,277 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2019-11-19 23:21:47,278 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2019-11-19 23:21:47,278 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2019-11-19 23:21:47,278 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2019-11-19 23:21:47,278 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2019-11-19 23:21:47,278 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2019-11-19 23:21:47,279 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2019-11-19 23:21:47,279 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2019-11-19 23:21:47,279 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2019-11-19 23:21:47,279 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2019-11-19 23:21:47,279 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2019-11-19 23:21:47,280 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2019-11-19 23:21:47,280 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2019-11-19 23:21:47,280 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2019-11-19 23:21:47,281 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2019-11-19 23:21:47,281 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2019-11-19 23:21:47,281 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-11-19 23:21:47,281 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2019-11-19 23:21:47,281 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2019-11-19 23:21:47,283 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-11-19 23:21:47,283 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2019-11-19 23:21:47,283 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2019-11-19 23:21:47,283 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2019-11-19 23:21:47,284 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2019-11-19 23:21:47,285 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2019-11-19 23:21:47,285 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2019-11-19 23:21:47,285 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2019-11-19 23:21:47,285 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2019-11-19 23:21:47,285 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-19 23:21:47,285 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2019-11-19 23:21:47,286 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2019-11-19 23:21:47,286 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2019-11-19 23:21:47,286 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2019-11-19 23:21:47,286 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2019-11-19 23:21:47,286 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2019-11-19 23:21:47,287 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2019-11-19 23:21:47,287 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2019-11-19 23:21:47,287 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2019-11-19 23:21:47,287 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2019-11-19 23:21:47,287 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2019-11-19 23:21:47,287 INFO L130 BoogieDeclarations]: Found specification of procedure system [2019-11-19 23:21:47,288 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2019-11-19 23:21:47,288 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2019-11-19 23:21:47,288 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2019-11-19 23:21:47,288 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2019-11-19 23:21:47,288 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2019-11-19 23:21:47,288 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2019-11-19 23:21:47,289 INFO L130 BoogieDeclarations]: Found specification of procedure div [2019-11-19 23:21:47,289 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2019-11-19 23:21:47,289 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2019-11-19 23:21:47,289 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2019-11-19 23:21:47,289 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2019-11-19 23:21:47,289 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2019-11-19 23:21:47,289 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2019-11-19 23:21:47,289 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2019-11-19 23:21:47,290 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2019-11-19 23:21:47,290 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2019-11-19 23:21:47,290 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2019-11-19 23:21:47,290 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2019-11-19 23:21:47,290 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2019-11-19 23:21:47,290 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2019-11-19 23:21:47,290 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2019-11-19 23:21:47,291 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2019-11-19 23:21:47,291 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2019-11-19 23:21:47,291 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2019-11-19 23:21:47,291 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2019-11-19 23:21:47,291 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2019-11-19 23:21:47,291 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2019-11-19 23:21:47,291 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-19 23:21:47,291 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2019-11-19 23:21:47,292 INFO L130 BoogieDeclarations]: Found specification of procedure cstrncat [2019-11-19 23:21:47,292 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2019-11-19 23:21:47,292 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2019-11-19 23:21:47,292 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-19 23:21:47,292 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-19 23:21:47,292 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-19 23:21:47,293 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-19 23:21:47,293 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-19 23:21:48,053 INFO L280 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-19 23:21:48,053 INFO L285 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-19 23:21:48,055 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 11:21:48 BoogieIcfgContainer [2019-11-19 23:21:48,055 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-19 23:21:48,056 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-19 23:21:48,056 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-19 23:21:48,060 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-19 23:21:48,060 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 11:21:46" (1/3) ... [2019-11-19 23:21:48,061 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1916a1a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 11:21:48, skipping insertion in model container [2019-11-19 23:21:48,061 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 11:21:47" (2/3) ... [2019-11-19 23:21:48,062 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1916a1a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 11:21:48, skipping insertion in model container [2019-11-19 23:21:48,062 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 11:21:48" (3/3) ... [2019-11-19 23:21:48,064 INFO L109 eAbstractionObserver]: Analyzing ICFG openbsd_cstrncat-alloca-2.i [2019-11-19 23:21:48,074 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-19 23:21:48,082 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 17 error locations. [2019-11-19 23:21:48,094 INFO L249 AbstractCegarLoop]: Starting to check reachability of 17 error locations. [2019-11-19 23:21:48,115 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-19 23:21:48,116 INFO L374 AbstractCegarLoop]: Hoare is false [2019-11-19 23:21:48,116 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-19 23:21:48,116 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-19 23:21:48,116 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-19 23:21:48,117 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-19 23:21:48,117 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-19 23:21:48,117 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-19 23:21:48,135 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states. [2019-11-19 23:21:48,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-19 23:21:48,146 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 23:21:48,147 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 23:21:48,148 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, cstrncatErr0REQUIRES_VIOLATION, cstrncatErr5REQUIRES_VIOLATION, cstrncatErr7REQUIRES_VIOLATION, cstrncatErr6REQUIRES_VIOLATION, cstrncatErr1REQUIRES_VIOLATION, cstrncatErr3REQUIRES_VIOLATION, cstrncatErr2REQUIRES_VIOLATION, cstrncatErr4REQUIRES_VIOLATION]=== [2019-11-19 23:21:48,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 23:21:48,155 INFO L82 PathProgramCache]: Analyzing trace with hash 1824069154, now seen corresponding path program 1 times [2019-11-19 23:21:48,168 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-19 23:21:48,168 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [185727185] [2019-11-19 23:21:48,169 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2e59f848-c2b2-4584-aacd-f6a28869cd42/bin/uautomizer/cvc4 Starting monitored process 2 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-19 23:21:48,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 23:21:48,405 INFO L255 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-19 23:21:48,411 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 23:21:48,446 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:21:48,446 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-19 23:21:48,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:21:48,465 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [185727185] [2019-11-19 23:21:48,466 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-19 23:21:48,466 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2019-11-19 23:21:48,467 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701126107] [2019-11-19 23:21:48,473 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-19 23:21:48,473 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-19 23:21:48,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-19 23:21:48,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-19 23:21:48,494 INFO L87 Difference]: Start difference. First operand 58 states. Second operand 3 states. [2019-11-19 23:21:48,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 23:21:48,677 INFO L93 Difference]: Finished difference Result 59 states and 68 transitions. [2019-11-19 23:21:48,678 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-19 23:21:48,679 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2019-11-19 23:21:48,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 23:21:48,699 INFO L225 Difference]: With dead ends: 59 [2019-11-19 23:21:48,700 INFO L226 Difference]: Without dead ends: 55 [2019-11-19 23:21:48,702 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-19 23:21:48,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-11-19 23:21:48,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2019-11-19 23:21:48,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2019-11-19 23:21:48,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 63 transitions. [2019-11-19 23:21:48,745 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 63 transitions. Word has length 11 [2019-11-19 23:21:48,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 23:21:48,746 INFO L462 AbstractCegarLoop]: Abstraction has 55 states and 63 transitions. [2019-11-19 23:21:48,746 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-19 23:21:48,746 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 63 transitions. [2019-11-19 23:21:48,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-19 23:21:48,747 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 23:21:48,747 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 23:21:48,951 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-19 23:21:48,951 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, cstrncatErr0REQUIRES_VIOLATION, cstrncatErr5REQUIRES_VIOLATION, cstrncatErr7REQUIRES_VIOLATION, cstrncatErr6REQUIRES_VIOLATION, cstrncatErr1REQUIRES_VIOLATION, cstrncatErr3REQUIRES_VIOLATION, cstrncatErr2REQUIRES_VIOLATION, cstrncatErr4REQUIRES_VIOLATION]=== [2019-11-19 23:21:48,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 23:21:48,952 INFO L82 PathProgramCache]: Analyzing trace with hash 711568831, now seen corresponding path program 1 times [2019-11-19 23:21:48,953 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-19 23:21:48,953 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1548900003] [2019-11-19 23:21:48,953 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2e59f848-c2b2-4584-aacd-f6a28869cd42/bin/uautomizer/cvc4 Starting monitored process 3 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-19 23:21:49,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 23:21:49,193 INFO L255 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-19 23:21:49,194 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 23:21:49,305 INFO L343 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2019-11-19 23:21:49,306 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2019-11-19 23:21:49,307 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 23:21:49,331 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 23:21:49,333 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-19 23:21:49,333 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:18, output treesize:15 [2019-11-19 23:21:49,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:21:49,367 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-19 23:21:49,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:21:49,403 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1548900003] [2019-11-19 23:21:49,404 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-19 23:21:49,404 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2019-11-19 23:21:49,404 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274458754] [2019-11-19 23:21:49,406 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-19 23:21:49,406 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-19 23:21:49,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-19 23:21:49,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-19 23:21:49,407 INFO L87 Difference]: Start difference. First operand 55 states and 63 transitions. Second operand 4 states. [2019-11-19 23:21:49,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 23:21:49,626 INFO L93 Difference]: Finished difference Result 53 states and 61 transitions. [2019-11-19 23:21:49,627 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-19 23:21:49,627 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2019-11-19 23:21:49,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 23:21:49,629 INFO L225 Difference]: With dead ends: 53 [2019-11-19 23:21:49,629 INFO L226 Difference]: Without dead ends: 53 [2019-11-19 23:21:49,630 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-19 23:21:49,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-11-19 23:21:49,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2019-11-19 23:21:49,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-11-19 23:21:49,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 61 transitions. [2019-11-19 23:21:49,646 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 61 transitions. Word has length 12 [2019-11-19 23:21:49,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 23:21:49,646 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 61 transitions. [2019-11-19 23:21:49,646 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-19 23:21:49,647 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 61 transitions. [2019-11-19 23:21:49,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-19 23:21:49,648 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 23:21:49,648 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 23:21:49,859 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-19 23:21:49,860 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, cstrncatErr0REQUIRES_VIOLATION, cstrncatErr5REQUIRES_VIOLATION, cstrncatErr7REQUIRES_VIOLATION, cstrncatErr6REQUIRES_VIOLATION, cstrncatErr1REQUIRES_VIOLATION, cstrncatErr3REQUIRES_VIOLATION, cstrncatErr2REQUIRES_VIOLATION, cstrncatErr4REQUIRES_VIOLATION]=== [2019-11-19 23:21:49,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 23:21:49,861 INFO L82 PathProgramCache]: Analyzing trace with hash 711568832, now seen corresponding path program 1 times [2019-11-19 23:21:49,863 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-19 23:21:49,864 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [270465224] [2019-11-19 23:21:49,864 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2e59f848-c2b2-4584-aacd-f6a28869cd42/bin/uautomizer/cvc4 Starting monitored process 4 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-19 23:21:50,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 23:21:50,134 INFO L255 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-19 23:21:50,136 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 23:21:50,155 INFO L392 ElimStorePlain]: Different costs {0=[|v_#length_23|], 1=[|v_#valid_39|]} [2019-11-19 23:21:50,164 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-19 23:21:50,167 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2019-11-19 23:21:50,167 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 23:21:50,208 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 23:21:50,221 INFO L377 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 10 treesize of output 8 [2019-11-19 23:21:50,222 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-19 23:21:50,257 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 23:21:50,258 INFO L496 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-19 23:21:50,259 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 5 variables, input treesize:28, output treesize:13 [2019-11-19 23:21:50,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:21:50,289 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-19 23:21:50,410 INFO L392 ElimStorePlain]: Different costs {1=[|#valid|], 2=[|#length|]} [2019-11-19 23:21:50,422 INFO L377 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 10 treesize of output 8 [2019-11-19 23:21:50,423 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 23:21:50,435 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 23:21:50,438 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-19 23:21:50,438 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-19 23:21:50,464 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 23:21:50,465 INFO L496 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-19 23:21:50,465 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 5 variables, input treesize:21, output treesize:3 [2019-11-19 23:21:50,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:21:50,482 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [270465224] [2019-11-19 23:21:50,482 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-19 23:21:50,482 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2019-11-19 23:21:50,482 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316465636] [2019-11-19 23:21:50,483 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-19 23:21:50,483 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-19 23:21:50,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-19 23:21:50,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-19 23:21:50,484 INFO L87 Difference]: Start difference. First operand 53 states and 61 transitions. Second operand 5 states. [2019-11-19 23:21:51,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 23:21:51,135 INFO L93 Difference]: Finished difference Result 73 states and 83 transitions. [2019-11-19 23:21:51,136 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-19 23:21:51,136 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2019-11-19 23:21:51,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 23:21:51,140 INFO L225 Difference]: With dead ends: 73 [2019-11-19 23:21:51,140 INFO L226 Difference]: Without dead ends: 73 [2019-11-19 23:21:51,141 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-11-19 23:21:51,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2019-11-19 23:21:51,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 55. [2019-11-19 23:21:51,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2019-11-19 23:21:51,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 64 transitions. [2019-11-19 23:21:51,155 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 64 transitions. Word has length 12 [2019-11-19 23:21:51,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 23:21:51,156 INFO L462 AbstractCegarLoop]: Abstraction has 55 states and 64 transitions. [2019-11-19 23:21:51,156 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-19 23:21:51,156 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 64 transitions. [2019-11-19 23:21:51,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-19 23:21:51,157 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 23:21:51,157 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 23:21:51,360 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-19 23:21:51,361 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, cstrncatErr0REQUIRES_VIOLATION, cstrncatErr5REQUIRES_VIOLATION, cstrncatErr7REQUIRES_VIOLATION, cstrncatErr6REQUIRES_VIOLATION, cstrncatErr1REQUIRES_VIOLATION, cstrncatErr3REQUIRES_VIOLATION, cstrncatErr2REQUIRES_VIOLATION, cstrncatErr4REQUIRES_VIOLATION]=== [2019-11-19 23:21:51,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 23:21:51,361 INFO L82 PathProgramCache]: Analyzing trace with hash 917798007, now seen corresponding path program 1 times [2019-11-19 23:21:51,362 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-19 23:21:51,362 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [2090473246] [2019-11-19 23:21:51,362 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2e59f848-c2b2-4584-aacd-f6a28869cd42/bin/uautomizer/cvc4 Starting monitored process 5 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-19 23:21:51,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 23:21:51,627 INFO L255 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-19 23:21:51,629 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 23:21:51,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:21:51,772 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-19 23:21:51,965 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:21:51,965 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2090473246] [2019-11-19 23:21:51,965 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-19 23:21:51,965 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 5] imperfect sequences [] total 9 [2019-11-19 23:21:51,966 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983764466] [2019-11-19 23:21:51,966 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-19 23:21:51,966 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-19 23:21:51,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-19 23:21:51,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-11-19 23:21:51,967 INFO L87 Difference]: Start difference. First operand 55 states and 64 transitions. Second operand 9 states. [2019-11-19 23:21:53,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 23:21:53,224 INFO L93 Difference]: Finished difference Result 110 states and 123 transitions. [2019-11-19 23:21:53,225 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-19 23:21:53,225 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 14 [2019-11-19 23:21:53,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 23:21:53,227 INFO L225 Difference]: With dead ends: 110 [2019-11-19 23:21:53,228 INFO L226 Difference]: Without dead ends: 110 [2019-11-19 23:21:53,228 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=111, Invalid=161, Unknown=0, NotChecked=0, Total=272 [2019-11-19 23:21:53,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2019-11-19 23:21:53,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 55. [2019-11-19 23:21:53,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2019-11-19 23:21:53,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 63 transitions. [2019-11-19 23:21:53,242 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 63 transitions. Word has length 14 [2019-11-19 23:21:53,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 23:21:53,243 INFO L462 AbstractCegarLoop]: Abstraction has 55 states and 63 transitions. [2019-11-19 23:21:53,243 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-19 23:21:53,243 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 63 transitions. [2019-11-19 23:21:53,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-19 23:21:53,244 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 23:21:53,245 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 23:21:53,448 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-19 23:21:53,452 INFO L410 AbstractCegarLoop]: === Iteration 5 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, cstrncatErr0REQUIRES_VIOLATION, cstrncatErr5REQUIRES_VIOLATION, cstrncatErr7REQUIRES_VIOLATION, cstrncatErr6REQUIRES_VIOLATION, cstrncatErr1REQUIRES_VIOLATION, cstrncatErr3REQUIRES_VIOLATION, cstrncatErr2REQUIRES_VIOLATION, cstrncatErr4REQUIRES_VIOLATION]=== [2019-11-19 23:21:53,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 23:21:53,452 INFO L82 PathProgramCache]: Analyzing trace with hash 1584157955, now seen corresponding path program 1 times [2019-11-19 23:21:53,453 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-19 23:21:53,453 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [762088474] [2019-11-19 23:21:53,453 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2e59f848-c2b2-4584-aacd-f6a28869cd42/bin/uautomizer/cvc4 Starting monitored process 6 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-19 23:21:53,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 23:21:53,675 INFO L255 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-19 23:21:53,677 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 23:21:53,693 INFO L392 ElimStorePlain]: Different costs {0=[|v_#length_26|], 1=[|v_#valid_48|]} [2019-11-19 23:21:53,708 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-19 23:21:53,710 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2019-11-19 23:21:53,710 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 23:21:53,745 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 23:21:53,759 INFO L377 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 10 treesize of output 8 [2019-11-19 23:21:53,760 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-19 23:21:53,804 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 23:21:53,805 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-19 23:21:53,805 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:28, output treesize:16 [2019-11-19 23:21:54,002 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:21:54,003 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-19 23:21:54,553 INFO L392 ElimStorePlain]: Different costs {1=[|#valid|], 2=[|#length|]} [2019-11-19 23:21:54,558 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-19 23:21:54,559 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 23:21:54,563 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 23:21:54,563 INFO L464 ElimStorePlain]: Eliminatee |#length| vanished before elimination [2019-11-19 23:21:54,564 INFO L496 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-19 23:21:54,564 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:39, output treesize:1 [2019-11-19 23:21:54,570 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:21:54,570 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [762088474] [2019-11-19 23:21:54,571 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 23:21:54,571 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2019-11-19 23:21:54,571 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400611499] [2019-11-19 23:21:54,571 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-19 23:21:54,572 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-19 23:21:54,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-19 23:21:54,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2019-11-19 23:21:54,572 INFO L87 Difference]: Start difference. First operand 55 states and 63 transitions. Second operand 10 states. [2019-11-19 23:21:54,886 WARN L191 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 26 [2019-11-19 23:21:55,627 WARN L191 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2019-11-19 23:21:56,144 WARN L191 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2019-11-19 23:21:56,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 23:21:56,651 INFO L93 Difference]: Finished difference Result 95 states and 107 transitions. [2019-11-19 23:21:56,652 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-19 23:21:56,653 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 16 [2019-11-19 23:21:56,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 23:21:56,654 INFO L225 Difference]: With dead ends: 95 [2019-11-19 23:21:56,654 INFO L226 Difference]: Without dead ends: 95 [2019-11-19 23:21:56,655 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2019-11-19 23:21:56,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2019-11-19 23:21:56,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 63. [2019-11-19 23:21:56,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2019-11-19 23:21:56,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 73 transitions. [2019-11-19 23:21:56,664 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 73 transitions. Word has length 16 [2019-11-19 23:21:56,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 23:21:56,665 INFO L462 AbstractCegarLoop]: Abstraction has 63 states and 73 transitions. [2019-11-19 23:21:56,665 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-19 23:21:56,665 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 73 transitions. [2019-11-19 23:21:56,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-19 23:21:56,666 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 23:21:56,666 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 23:21:56,866 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-19 23:21:56,867 INFO L410 AbstractCegarLoop]: === Iteration 6 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, cstrncatErr0REQUIRES_VIOLATION, cstrncatErr5REQUIRES_VIOLATION, cstrncatErr7REQUIRES_VIOLATION, cstrncatErr6REQUIRES_VIOLATION, cstrncatErr1REQUIRES_VIOLATION, cstrncatErr3REQUIRES_VIOLATION, cstrncatErr2REQUIRES_VIOLATION, cstrncatErr4REQUIRES_VIOLATION]=== [2019-11-19 23:21:56,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 23:21:56,867 INFO L82 PathProgramCache]: Analyzing trace with hash 1957322490, now seen corresponding path program 1 times [2019-11-19 23:21:56,867 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-19 23:21:56,868 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [351016060] [2019-11-19 23:21:56,868 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2e59f848-c2b2-4584-aacd-f6a28869cd42/bin/uautomizer/cvc4 Starting monitored process 7 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-19 23:21:57,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 23:21:57,097 INFO L255 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-19 23:21:57,099 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 23:21:57,391 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:21:57,391 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-19 23:21:58,014 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-19 23:21:58,074 INFO L377 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 29 treesize of output 27 [2019-11-19 23:21:58,075 INFO L496 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-19 23:21:58,107 INFO L377 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 26 treesize of output 22 [2019-11-19 23:21:58,108 INFO L496 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-19 23:21:58,143 INFO L377 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 25 treesize of output 23 [2019-11-19 23:21:58,144 INFO L496 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-19 23:21:58,292 WARN L191 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2019-11-19 23:21:58,292 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 23:21:58,293 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 3 xjuncts. [2019-11-19 23:21:58,294 INFO L221 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:81, output treesize:73 [2019-11-19 23:21:58,794 WARN L191 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 26 [2019-11-19 23:21:59,302 WARN L191 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2019-11-19 23:21:59,306 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-19 23:21:59,739 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:21:59,739 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [351016060] [2019-11-19 23:21:59,739 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 23:21:59,739 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2019-11-19 23:21:59,740 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333383106] [2019-11-19 23:21:59,740 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-19 23:21:59,740 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-19 23:21:59,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-19 23:21:59,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2019-11-19 23:21:59,741 INFO L87 Difference]: Start difference. First operand 63 states and 73 transitions. Second operand 14 states. [2019-11-19 23:22:00,713 WARN L191 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 23 [2019-11-19 23:22:02,088 WARN L191 SmtUtils]: Spent 964.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2019-11-19 23:22:03,173 WARN L191 SmtUtils]: Spent 604.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2019-11-19 23:22:04,880 WARN L191 SmtUtils]: Spent 1.22 s on a formula simplification. DAG size of input: 53 DAG size of output: 46 [2019-11-19 23:22:06,105 WARN L191 SmtUtils]: Spent 799.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2019-11-19 23:22:07,454 WARN L191 SmtUtils]: Spent 888.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 45 [2019-11-19 23:22:09,177 WARN L191 SmtUtils]: Spent 1.29 s on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2019-11-19 23:22:09,462 WARN L191 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 24 [2019-11-19 23:22:10,448 WARN L191 SmtUtils]: Spent 554.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 35 [2019-11-19 23:22:11,423 WARN L191 SmtUtils]: Spent 360.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2019-11-19 23:22:12,790 WARN L191 SmtUtils]: Spent 809.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 43 [2019-11-19 23:22:14,081 WARN L191 SmtUtils]: Spent 894.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2019-11-19 23:22:22,974 WARN L191 SmtUtils]: Spent 425.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 32 [2019-11-19 23:22:26,047 WARN L191 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 30 [2019-11-19 23:22:35,478 WARN L191 SmtUtils]: Spent 2.05 s on a formula simplification. DAG size of input: 36 DAG size of output: 20 [2019-11-19 23:22:38,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 23:22:38,832 INFO L93 Difference]: Finished difference Result 205 states and 232 transitions. [2019-11-19 23:22:38,835 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-11-19 23:22:38,835 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2019-11-19 23:22:38,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 23:22:38,838 INFO L225 Difference]: With dead ends: 205 [2019-11-19 23:22:38,838 INFO L226 Difference]: Without dead ends: 205 [2019-11-19 23:22:38,839 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 33.0s TimeCoverageRelationStatistics Valid=287, Invalid=641, Unknown=2, NotChecked=0, Total=930 [2019-11-19 23:22:38,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2019-11-19 23:22:38,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 91. [2019-11-19 23:22:38,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2019-11-19 23:22:38,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 110 transitions. [2019-11-19 23:22:38,852 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 110 transitions. Word has length 18 [2019-11-19 23:22:38,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 23:22:38,852 INFO L462 AbstractCegarLoop]: Abstraction has 91 states and 110 transitions. [2019-11-19 23:22:38,852 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-19 23:22:38,853 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 110 transitions. [2019-11-19 23:22:38,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-19 23:22:38,854 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 23:22:38,854 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 23:22:39,058 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-19 23:22:39,059 INFO L410 AbstractCegarLoop]: === Iteration 7 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, cstrncatErr0REQUIRES_VIOLATION, cstrncatErr5REQUIRES_VIOLATION, cstrncatErr7REQUIRES_VIOLATION, cstrncatErr6REQUIRES_VIOLATION, cstrncatErr1REQUIRES_VIOLATION, cstrncatErr3REQUIRES_VIOLATION, cstrncatErr2REQUIRES_VIOLATION, cstrncatErr4REQUIRES_VIOLATION]=== [2019-11-19 23:22:39,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 23:22:39,059 INFO L82 PathProgramCache]: Analyzing trace with hash 1957322542, now seen corresponding path program 1 times [2019-11-19 23:22:39,060 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-19 23:22:39,060 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1735726253] [2019-11-19 23:22:39,060 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2e59f848-c2b2-4584-aacd-f6a28869cd42/bin/uautomizer/cvc4 Starting monitored process 8 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-19 23:22:39,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 23:22:39,231 INFO L255 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-19 23:22:39,233 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 23:22:39,249 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-19 23:22:39,250 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-19 23:22:39,291 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-19 23:22:39,292 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1735726253] [2019-11-19 23:22:39,292 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-19 23:22:39,292 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2019-11-19 23:22:39,292 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918189743] [2019-11-19 23:22:39,293 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-19 23:22:39,293 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-19 23:22:39,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-19 23:22:39,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-11-19 23:22:39,293 INFO L87 Difference]: Start difference. First operand 91 states and 110 transitions. Second operand 6 states. [2019-11-19 23:22:39,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 23:22:39,403 INFO L93 Difference]: Finished difference Result 121 states and 143 transitions. [2019-11-19 23:22:39,403 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-19 23:22:39,404 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2019-11-19 23:22:39,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 23:22:39,406 INFO L225 Difference]: With dead ends: 121 [2019-11-19 23:22:39,406 INFO L226 Difference]: Without dead ends: 121 [2019-11-19 23:22:39,407 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-11-19 23:22:39,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2019-11-19 23:22:39,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 110. [2019-11-19 23:22:39,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2019-11-19 23:22:39,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 133 transitions. [2019-11-19 23:22:39,417 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 133 transitions. Word has length 18 [2019-11-19 23:22:39,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 23:22:39,417 INFO L462 AbstractCegarLoop]: Abstraction has 110 states and 133 transitions. [2019-11-19 23:22:39,418 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-19 23:22:39,418 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 133 transitions. [2019-11-19 23:22:39,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-19 23:22:39,419 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 23:22:39,419 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 23:22:39,622 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-19 23:22:39,623 INFO L410 AbstractCegarLoop]: === Iteration 8 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, cstrncatErr0REQUIRES_VIOLATION, cstrncatErr5REQUIRES_VIOLATION, cstrncatErr7REQUIRES_VIOLATION, cstrncatErr6REQUIRES_VIOLATION, cstrncatErr1REQUIRES_VIOLATION, cstrncatErr3REQUIRES_VIOLATION, cstrncatErr2REQUIRES_VIOLATION, cstrncatErr4REQUIRES_VIOLATION]=== [2019-11-19 23:22:39,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 23:22:39,623 INFO L82 PathProgramCache]: Analyzing trace with hash -1636580176, now seen corresponding path program 1 times [2019-11-19 23:22:39,624 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-19 23:22:39,624 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [709710991] [2019-11-19 23:22:39,624 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2e59f848-c2b2-4584-aacd-f6a28869cd42/bin/uautomizer/cvc4 Starting monitored process 9 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-19 23:22:39,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 23:22:39,797 INFO L255 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-19 23:22:39,799 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 23:22:40,033 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:22:40,034 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-19 23:22:40,539 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:22:40,539 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [709710991] [2019-11-19 23:22:40,539 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 23:22:40,539 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2019-11-19 23:22:40,540 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849665304] [2019-11-19 23:22:40,540 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-19 23:22:40,540 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-19 23:22:40,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-19 23:22:40,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2019-11-19 23:22:40,541 INFO L87 Difference]: Start difference. First operand 110 states and 133 transitions. Second operand 15 states. [2019-11-19 23:22:41,235 WARN L191 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2019-11-19 23:22:41,491 WARN L191 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2019-11-19 23:22:42,957 WARN L191 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2019-11-19 23:22:43,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 23:22:43,279 INFO L93 Difference]: Finished difference Result 166 states and 187 transitions. [2019-11-19 23:22:43,281 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-11-19 23:22:43,282 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2019-11-19 23:22:43,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 23:22:43,283 INFO L225 Difference]: With dead ends: 166 [2019-11-19 23:22:43,283 INFO L226 Difference]: Without dead ends: 166 [2019-11-19 23:22:43,284 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=273, Invalid=597, Unknown=0, NotChecked=0, Total=870 [2019-11-19 23:22:43,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2019-11-19 23:22:43,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 105. [2019-11-19 23:22:43,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2019-11-19 23:22:43,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 125 transitions. [2019-11-19 23:22:43,295 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 125 transitions. Word has length 18 [2019-11-19 23:22:43,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 23:22:43,295 INFO L462 AbstractCegarLoop]: Abstraction has 105 states and 125 transitions. [2019-11-19 23:22:43,296 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-19 23:22:43,296 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 125 transitions. [2019-11-19 23:22:43,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-19 23:22:43,297 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 23:22:43,297 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 23:22:43,500 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-19 23:22:43,501 INFO L410 AbstractCegarLoop]: === Iteration 9 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, cstrncatErr0REQUIRES_VIOLATION, cstrncatErr5REQUIRES_VIOLATION, cstrncatErr7REQUIRES_VIOLATION, cstrncatErr6REQUIRES_VIOLATION, cstrncatErr1REQUIRES_VIOLATION, cstrncatErr3REQUIRES_VIOLATION, cstrncatErr2REQUIRES_VIOLATION, cstrncatErr4REQUIRES_VIOLATION]=== [2019-11-19 23:22:43,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 23:22:43,501 INFO L82 PathProgramCache]: Analyzing trace with hash -2029607238, now seen corresponding path program 1 times [2019-11-19 23:22:43,501 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-19 23:22:43,502 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1774446982] [2019-11-19 23:22:43,502 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2e59f848-c2b2-4584-aacd-f6a28869cd42/bin/uautomizer/cvc4 Starting monitored process 10 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-19 23:22:43,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 23:22:43,729 INFO L255 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-19 23:22:43,731 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 23:22:44,295 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:22:44,295 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-19 23:22:44,768 WARN L191 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2019-11-19 23:22:45,019 WARN L191 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2019-11-19 23:22:45,020 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-19 23:22:45,084 INFO L377 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 29 treesize of output 27 [2019-11-19 23:22:45,085 INFO L496 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-19 23:22:45,135 INFO L377 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 26 treesize of output 22 [2019-11-19 23:22:45,136 INFO L496 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-19 23:22:45,179 INFO L377 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 25 treesize of output 23 [2019-11-19 23:22:45,179 INFO L496 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-19 23:22:45,343 WARN L191 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2019-11-19 23:22:45,343 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 23:22:45,344 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 3 xjuncts. [2019-11-19 23:22:45,345 INFO L221 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:81, output treesize:73 [2019-11-19 23:22:45,920 WARN L191 SmtUtils]: Spent 333.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 26 [2019-11-19 23:22:46,429 WARN L191 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2019-11-19 23:22:47,017 WARN L191 SmtUtils]: Spent 346.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 27 [2019-11-19 23:22:47,018 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-19 23:22:47,437 WARN L191 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 20 [2019-11-19 23:22:47,460 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:22:47,460 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1774446982] [2019-11-19 23:22:47,460 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 23:22:47,460 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2019-11-19 23:22:47,461 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819439159] [2019-11-19 23:22:47,461 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-19 23:22:47,461 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-19 23:22:47,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-19 23:22:47,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2019-11-19 23:22:47,462 INFO L87 Difference]: Start difference. First operand 105 states and 125 transitions. Second operand 16 states. [2019-11-19 23:22:48,163 WARN L191 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 30 [2019-11-19 23:22:48,635 WARN L191 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 25 [2019-11-19 23:22:49,293 WARN L191 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 27 [2019-11-19 23:22:49,601 WARN L191 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 27 [2019-11-19 23:22:50,515 WARN L191 SmtUtils]: Spent 333.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 35 [2019-11-19 23:22:52,215 WARN L191 SmtUtils]: Spent 359.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2019-11-19 23:22:55,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 23:22:55,088 INFO L93 Difference]: Finished difference Result 146 states and 170 transitions. [2019-11-19 23:22:55,091 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-19 23:22:55,091 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 18 [2019-11-19 23:22:55,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 23:22:55,092 INFO L225 Difference]: With dead ends: 146 [2019-11-19 23:22:55,093 INFO L226 Difference]: Without dead ends: 146 [2019-11-19 23:22:55,093 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=175, Invalid=377, Unknown=0, NotChecked=0, Total=552 [2019-11-19 23:22:55,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2019-11-19 23:22:55,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 80. [2019-11-19 23:22:55,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2019-11-19 23:22:55,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 95 transitions. [2019-11-19 23:22:55,099 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 95 transitions. Word has length 18 [2019-11-19 23:22:55,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 23:22:55,099 INFO L462 AbstractCegarLoop]: Abstraction has 80 states and 95 transitions. [2019-11-19 23:22:55,099 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-19 23:22:55,100 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 95 transitions. [2019-11-19 23:22:55,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-19 23:22:55,100 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 23:22:55,100 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 23:22:55,304 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-19 23:22:55,304 INFO L410 AbstractCegarLoop]: === Iteration 10 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, cstrncatErr0REQUIRES_VIOLATION, cstrncatErr5REQUIRES_VIOLATION, cstrncatErr7REQUIRES_VIOLATION, cstrncatErr6REQUIRES_VIOLATION, cstrncatErr1REQUIRES_VIOLATION, cstrncatErr3REQUIRES_VIOLATION, cstrncatErr2REQUIRES_VIOLATION, cstrncatErr4REQUIRES_VIOLATION]=== [2019-11-19 23:22:55,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 23:22:55,304 INFO L82 PathProgramCache]: Analyzing trace with hash 547455105, now seen corresponding path program 1 times [2019-11-19 23:22:55,305 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-19 23:22:55,305 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [259114915] [2019-11-19 23:22:55,305 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2e59f848-c2b2-4584-aacd-f6a28869cd42/bin/uautomizer/cvc4 Starting monitored process 11 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-19 23:22:55,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 23:22:55,452 INFO L255 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-19 23:22:55,453 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 23:22:55,467 INFO L343 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2019-11-19 23:22:55,468 INFO L377 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 1 case distinctions, treesize of input 9 treesize of output 11 [2019-11-19 23:22:55,468 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 23:22:55,472 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 23:22:55,473 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-19 23:22:55,473 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:9, output treesize:11 [2019-11-19 23:22:55,484 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-19 23:22:55,485 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-19 23:22:55,508 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-19 23:22:55,508 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [259114915] [2019-11-19 23:22:55,508 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-19 23:22:55,508 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 3] imperfect sequences [] total 3 [2019-11-19 23:22:55,508 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560877803] [2019-11-19 23:22:55,509 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-19 23:22:55,509 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-19 23:22:55,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-19 23:22:55,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-19 23:22:55,509 INFO L87 Difference]: Start difference. First operand 80 states and 95 transitions. Second operand 4 states. [2019-11-19 23:22:55,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 23:22:55,601 INFO L93 Difference]: Finished difference Result 78 states and 93 transitions. [2019-11-19 23:22:55,601 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-19 23:22:55,601 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2019-11-19 23:22:55,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 23:22:55,602 INFO L225 Difference]: With dead ends: 78 [2019-11-19 23:22:55,602 INFO L226 Difference]: Without dead ends: 78 [2019-11-19 23:22:55,603 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-19 23:22:55,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2019-11-19 23:22:55,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2019-11-19 23:22:55,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2019-11-19 23:22:55,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 93 transitions. [2019-11-19 23:22:55,606 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 93 transitions. Word has length 19 [2019-11-19 23:22:55,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 23:22:55,606 INFO L462 AbstractCegarLoop]: Abstraction has 78 states and 93 transitions. [2019-11-19 23:22:55,606 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-19 23:22:55,606 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 93 transitions. [2019-11-19 23:22:55,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-19 23:22:55,607 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 23:22:55,607 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 23:22:55,807 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-19 23:22:55,809 INFO L410 AbstractCegarLoop]: === Iteration 11 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, cstrncatErr0REQUIRES_VIOLATION, cstrncatErr5REQUIRES_VIOLATION, cstrncatErr7REQUIRES_VIOLATION, cstrncatErr6REQUIRES_VIOLATION, cstrncatErr1REQUIRES_VIOLATION, cstrncatErr3REQUIRES_VIOLATION, cstrncatErr2REQUIRES_VIOLATION, cstrncatErr4REQUIRES_VIOLATION]=== [2019-11-19 23:22:55,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 23:22:55,810 INFO L82 PathProgramCache]: Analyzing trace with hash 547455106, now seen corresponding path program 1 times [2019-11-19 23:22:55,810 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-19 23:22:55,810 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1605822310] [2019-11-19 23:22:55,810 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2e59f848-c2b2-4584-aacd-f6a28869cd42/bin/uautomizer/cvc4 Starting monitored process 12 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-19 23:22:56,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 23:22:56,003 INFO L255 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-19 23:22:56,005 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 23:22:56,084 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 23:22:56,084 INFO L377 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 1 case distinctions, treesize of input 9 treesize of output 25 [2019-11-19 23:22:56,085 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 23:22:56,130 INFO L567 ElimStorePlain]: treesize reduction 10, result has 69.7 percent of original size [2019-11-19 23:22:56,130 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-19 23:22:56,131 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:18, output treesize:14 [2019-11-19 23:22:56,147 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-19 23:22:56,147 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-19 23:22:56,300 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-19 23:22:56,301 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1605822310] [2019-11-19 23:22:56,301 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-19 23:22:56,301 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2019-11-19 23:22:56,301 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306654313] [2019-11-19 23:22:56,301 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-19 23:22:56,301 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-19 23:22:56,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-19 23:22:56,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-11-19 23:22:56,302 INFO L87 Difference]: Start difference. First operand 78 states and 93 transitions. Second operand 6 states. [2019-11-19 23:22:56,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 23:22:56,664 INFO L93 Difference]: Finished difference Result 86 states and 100 transitions. [2019-11-19 23:22:56,665 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-19 23:22:56,665 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2019-11-19 23:22:56,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 23:22:56,666 INFO L225 Difference]: With dead ends: 86 [2019-11-19 23:22:56,666 INFO L226 Difference]: Without dead ends: 86 [2019-11-19 23:22:56,667 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-11-19 23:22:56,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2019-11-19 23:22:56,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 77. [2019-11-19 23:22:56,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2019-11-19 23:22:56,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 92 transitions. [2019-11-19 23:22:56,672 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 92 transitions. Word has length 19 [2019-11-19 23:22:56,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 23:22:56,672 INFO L462 AbstractCegarLoop]: Abstraction has 77 states and 92 transitions. [2019-11-19 23:22:56,673 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-19 23:22:56,673 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 92 transitions. [2019-11-19 23:22:56,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-19 23:22:56,674 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 23:22:56,678 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 23:22:56,888 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-19 23:22:56,888 INFO L410 AbstractCegarLoop]: === Iteration 12 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, cstrncatErr0REQUIRES_VIOLATION, cstrncatErr5REQUIRES_VIOLATION, cstrncatErr7REQUIRES_VIOLATION, cstrncatErr6REQUIRES_VIOLATION, cstrncatErr1REQUIRES_VIOLATION, cstrncatErr3REQUIRES_VIOLATION, cstrncatErr2REQUIRES_VIOLATION, cstrncatErr4REQUIRES_VIOLATION]=== [2019-11-19 23:22:56,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 23:22:56,889 INFO L82 PathProgramCache]: Analyzing trace with hash -81114712, now seen corresponding path program 1 times [2019-11-19 23:22:56,889 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-19 23:22:56,889 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1878410137] [2019-11-19 23:22:56,889 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2e59f848-c2b2-4584-aacd-f6a28869cd42/bin/uautomizer/cvc4 Starting monitored process 13 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-19 23:22:57,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 23:22:57,065 INFO L255 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-19 23:22:57,067 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 23:22:57,093 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-19 23:22:57,093 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-19 23:22:57,101 INFO L377 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 14 treesize of output 10 [2019-11-19 23:22:57,102 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 23:22:57,103 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 23:22:57,103 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-19 23:22:57,109 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:14, output treesize:1 [2019-11-19 23:22:57,120 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-19 23:22:57,120 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1878410137] [2019-11-19 23:22:57,120 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-19 23:22:57,120 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2019-11-19 23:22:57,120 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704323959] [2019-11-19 23:22:57,121 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-19 23:22:57,121 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-19 23:22:57,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-19 23:22:57,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-11-19 23:22:57,121 INFO L87 Difference]: Start difference. First operand 77 states and 92 transitions. Second operand 6 states. [2019-11-19 23:22:57,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 23:22:57,362 INFO L93 Difference]: Finished difference Result 77 states and 92 transitions. [2019-11-19 23:22:57,362 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-19 23:22:57,363 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2019-11-19 23:22:57,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 23:22:57,365 INFO L225 Difference]: With dead ends: 77 [2019-11-19 23:22:57,365 INFO L226 Difference]: Without dead ends: 77 [2019-11-19 23:22:57,366 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-11-19 23:22:57,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2019-11-19 23:22:57,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 74. [2019-11-19 23:22:57,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2019-11-19 23:22:57,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 89 transitions. [2019-11-19 23:22:57,370 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 89 transitions. Word has length 23 [2019-11-19 23:22:57,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 23:22:57,370 INFO L462 AbstractCegarLoop]: Abstraction has 74 states and 89 transitions. [2019-11-19 23:22:57,370 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-19 23:22:57,370 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 89 transitions. [2019-11-19 23:22:57,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-19 23:22:57,371 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 23:22:57,371 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 23:22:57,575 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-19 23:22:57,575 INFO L410 AbstractCegarLoop]: === Iteration 13 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, cstrncatErr0REQUIRES_VIOLATION, cstrncatErr5REQUIRES_VIOLATION, cstrncatErr7REQUIRES_VIOLATION, cstrncatErr6REQUIRES_VIOLATION, cstrncatErr1REQUIRES_VIOLATION, cstrncatErr3REQUIRES_VIOLATION, cstrncatErr2REQUIRES_VIOLATION, cstrncatErr4REQUIRES_VIOLATION]=== [2019-11-19 23:22:57,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 23:22:57,576 INFO L82 PathProgramCache]: Analyzing trace with hash -81114711, now seen corresponding path program 1 times [2019-11-19 23:22:57,576 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-19 23:22:57,576 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [334336103] [2019-11-19 23:22:57,576 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2e59f848-c2b2-4584-aacd-f6a28869cd42/bin/uautomizer/cvc4 Starting monitored process 14 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-19 23:22:57,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 23:22:57,760 INFO L255 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-19 23:22:57,762 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 23:22:57,885 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:22:57,885 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-19 23:22:58,140 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-19 23:22:58,152 INFO L377 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 13 treesize of output 11 [2019-11-19 23:22:58,152 INFO L496 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-19 23:22:58,172 INFO L377 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 15 treesize of output 13 [2019-11-19 23:22:58,172 INFO L496 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-19 23:22:58,183 INFO L377 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 [2019-11-19 23:22:58,183 INFO L496 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-19 23:22:58,235 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 23:22:58,236 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 3 xjuncts. [2019-11-19 23:22:58,236 INFO L221 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:46, output treesize:38 [2019-11-19 23:22:58,428 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:22:58,428 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [334336103] [2019-11-19 23:22:58,428 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 23:22:58,429 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2019-11-19 23:22:58,429 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313598556] [2019-11-19 23:22:58,429 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-19 23:22:58,429 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-19 23:22:58,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-19 23:22:58,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2019-11-19 23:22:58,430 INFO L87 Difference]: Start difference. First operand 74 states and 89 transitions. Second operand 12 states. [2019-11-19 23:22:59,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 23:22:59,827 INFO L93 Difference]: Finished difference Result 103 states and 122 transitions. [2019-11-19 23:22:59,828 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-19 23:22:59,828 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 23 [2019-11-19 23:22:59,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 23:22:59,829 INFO L225 Difference]: With dead ends: 103 [2019-11-19 23:22:59,830 INFO L226 Difference]: Without dead ends: 103 [2019-11-19 23:22:59,830 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2019-11-19 23:22:59,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2019-11-19 23:22:59,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 79. [2019-11-19 23:22:59,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2019-11-19 23:22:59,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 96 transitions. [2019-11-19 23:22:59,834 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 96 transitions. Word has length 23 [2019-11-19 23:22:59,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 23:22:59,834 INFO L462 AbstractCegarLoop]: Abstraction has 79 states and 96 transitions. [2019-11-19 23:22:59,835 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-19 23:22:59,835 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 96 transitions. [2019-11-19 23:22:59,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-11-19 23:22:59,835 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 23:22:59,836 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 23:23:00,039 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-19 23:23:00,040 INFO L410 AbstractCegarLoop]: === Iteration 14 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, cstrncatErr0REQUIRES_VIOLATION, cstrncatErr5REQUIRES_VIOLATION, cstrncatErr7REQUIRES_VIOLATION, cstrncatErr6REQUIRES_VIOLATION, cstrncatErr1REQUIRES_VIOLATION, cstrncatErr3REQUIRES_VIOLATION, cstrncatErr2REQUIRES_VIOLATION, cstrncatErr4REQUIRES_VIOLATION]=== [2019-11-19 23:23:00,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 23:23:00,040 INFO L82 PathProgramCache]: Analyzing trace with hash -607380300, now seen corresponding path program 1 times [2019-11-19 23:23:00,040 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-19 23:23:00,040 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [368960124] [2019-11-19 23:23:00,040 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2e59f848-c2b2-4584-aacd-f6a28869cd42/bin/uautomizer/cvc4 Starting monitored process 15 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-19 23:23:00,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 23:23:00,215 INFO L255 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-19 23:23:00,217 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 23:23:00,251 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-19 23:23:00,269 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 23:23:00,269 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 25 [2019-11-19 23:23:00,270 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 23:23:00,339 INFO L567 ElimStorePlain]: treesize reduction 10, result has 75.6 percent of original size [2019-11-19 23:23:00,340 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-19 23:23:00,340 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:26, output treesize:21 [2019-11-19 23:23:00,641 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:23:00,642 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-19 23:23:01,695 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:23:01,696 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [368960124] [2019-11-19 23:23:01,696 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 23:23:01,696 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2019-11-19 23:23:01,696 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295622933] [2019-11-19 23:23:01,696 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-19 23:23:01,697 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-19 23:23:01,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-19 23:23:01,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2019-11-19 23:23:01,697 INFO L87 Difference]: Start difference. First operand 79 states and 96 transitions. Second operand 18 states. [2019-11-19 23:23:03,962 WARN L191 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 32 [2019-11-19 23:23:04,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 23:23:04,367 INFO L93 Difference]: Finished difference Result 176 states and 205 transitions. [2019-11-19 23:23:04,368 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-19 23:23:04,368 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2019-11-19 23:23:04,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 23:23:04,369 INFO L225 Difference]: With dead ends: 176 [2019-11-19 23:23:04,370 INFO L226 Difference]: Without dead ends: 176 [2019-11-19 23:23:04,370 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=284, Invalid=646, Unknown=0, NotChecked=0, Total=930 [2019-11-19 23:23:04,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2019-11-19 23:23:04,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 81. [2019-11-19 23:23:04,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2019-11-19 23:23:04,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 99 transitions. [2019-11-19 23:23:04,375 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 99 transitions. Word has length 22 [2019-11-19 23:23:04,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 23:23:04,375 INFO L462 AbstractCegarLoop]: Abstraction has 81 states and 99 transitions. [2019-11-19 23:23:04,375 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-19 23:23:04,376 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 99 transitions. [2019-11-19 23:23:04,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-11-19 23:23:04,376 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 23:23:04,377 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 23:23:04,577 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-19 23:23:04,577 INFO L410 AbstractCegarLoop]: === Iteration 15 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, cstrncatErr0REQUIRES_VIOLATION, cstrncatErr5REQUIRES_VIOLATION, cstrncatErr7REQUIRES_VIOLATION, cstrncatErr6REQUIRES_VIOLATION, cstrncatErr1REQUIRES_VIOLATION, cstrncatErr3REQUIRES_VIOLATION, cstrncatErr2REQUIRES_VIOLATION, cstrncatErr4REQUIRES_VIOLATION]=== [2019-11-19 23:23:04,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 23:23:04,578 INFO L82 PathProgramCache]: Analyzing trace with hash -641827134, now seen corresponding path program 1 times [2019-11-19 23:23:04,578 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-19 23:23:04,578 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [2019305670] [2019-11-19 23:23:04,578 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2e59f848-c2b2-4584-aacd-f6a28869cd42/bin/uautomizer/cvc4 Starting monitored process 16 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-19 23:23:04,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 23:23:04,814 INFO L255 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 19 conjunts are in the unsatisfiable core [2019-11-19 23:23:04,816 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 23:23:04,828 INFO L392 ElimStorePlain]: Different costs {0=[|v_#length_38|], 1=[|v_#valid_89|]} [2019-11-19 23:23:04,856 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-19 23:23:04,858 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2019-11-19 23:23:04,858 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 23:23:04,876 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 23:23:04,882 INFO L377 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 10 treesize of output 8 [2019-11-19 23:23:04,882 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-19 23:23:04,897 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 23:23:04,897 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-19 23:23:04,898 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:24, output treesize:12 [2019-11-19 23:23:05,211 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:23:05,211 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-19 23:23:06,587 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:23:06,588 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2019305670] [2019-11-19 23:23:06,588 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 23:23:06,588 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2019-11-19 23:23:06,588 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276278005] [2019-11-19 23:23:06,588 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-19 23:23:06,589 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-19 23:23:06,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-19 23:23:06,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2019-11-19 23:23:06,589 INFO L87 Difference]: Start difference. First operand 81 states and 99 transitions. Second operand 19 states. [2019-11-19 23:23:08,082 WARN L191 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2019-11-19 23:23:08,409 WARN L191 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2019-11-19 23:23:08,918 WARN L191 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2019-11-19 23:23:09,283 WARN L191 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 31 [2019-11-19 23:23:09,981 WARN L191 SmtUtils]: Spent 378.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2019-11-19 23:23:10,761 WARN L191 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2019-11-19 23:23:11,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 23:23:11,764 INFO L93 Difference]: Finished difference Result 200 states and 237 transitions. [2019-11-19 23:23:11,766 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-19 23:23:11,766 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 25 [2019-11-19 23:23:11,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 23:23:11,768 INFO L225 Difference]: With dead ends: 200 [2019-11-19 23:23:11,768 INFO L226 Difference]: Without dead ends: 200 [2019-11-19 23:23:11,768 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=167, Invalid=703, Unknown=0, NotChecked=0, Total=870 [2019-11-19 23:23:11,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2019-11-19 23:23:11,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 140. [2019-11-19 23:23:11,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2019-11-19 23:23:11,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 193 transitions. [2019-11-19 23:23:11,776 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 193 transitions. Word has length 25 [2019-11-19 23:23:11,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 23:23:11,777 INFO L462 AbstractCegarLoop]: Abstraction has 140 states and 193 transitions. [2019-11-19 23:23:11,777 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-19 23:23:11,777 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 193 transitions. [2019-11-19 23:23:11,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-11-19 23:23:11,778 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 23:23:11,778 INFO L410 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 23:23:11,982 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-19 23:23:11,983 INFO L410 AbstractCegarLoop]: === Iteration 16 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, cstrncatErr0REQUIRES_VIOLATION, cstrncatErr5REQUIRES_VIOLATION, cstrncatErr7REQUIRES_VIOLATION, cstrncatErr6REQUIRES_VIOLATION, cstrncatErr1REQUIRES_VIOLATION, cstrncatErr3REQUIRES_VIOLATION, cstrncatErr2REQUIRES_VIOLATION, cstrncatErr4REQUIRES_VIOLATION]=== [2019-11-19 23:23:11,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 23:23:11,983 INFO L82 PathProgramCache]: Analyzing trace with hash 2059949833, now seen corresponding path program 2 times [2019-11-19 23:23:11,983 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-19 23:23:11,984 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1156320495] [2019-11-19 23:23:11,984 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2e59f848-c2b2-4584-aacd-f6a28869cd42/bin/uautomizer/cvc4 Starting monitored process 17 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-19 23:23:12,200 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-19 23:23:12,200 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-19 23:23:12,201 INFO L255 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-19 23:23:12,202 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 23:23:12,214 INFO L392 ElimStorePlain]: Different costs {0=[|v_#length_40|], 1=[|v_#valid_94|]} [2019-11-19 23:23:12,220 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-19 23:23:12,221 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2019-11-19 23:23:12,221 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 23:23:12,241 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 23:23:12,249 INFO L377 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 10 treesize of output 8 [2019-11-19 23:23:12,250 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-19 23:23:12,270 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 23:23:12,271 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-19 23:23:12,271 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:28, output treesize:16 [2019-11-19 23:23:12,497 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:23:12,497 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-19 23:23:13,939 WARN L191 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2019-11-19 23:23:13,947 INFO L392 ElimStorePlain]: Different costs {1=[|#valid|], 2=[|#length|]} [2019-11-19 23:23:13,959 INFO L377 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 10 treesize of output 8 [2019-11-19 23:23:13,959 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 23:23:13,993 INFO L567 ElimStorePlain]: treesize reduction 6, result has 77.8 percent of original size [2019-11-19 23:23:13,995 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-19 23:23:13,996 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-19 23:23:14,010 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 23:23:14,011 INFO L496 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-19 23:23:14,011 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 5 variables, input treesize:33, output treesize:10 [2019-11-19 23:23:14,143 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:23:14,143 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1156320495] [2019-11-19 23:23:14,143 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 23:23:14,143 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 16 [2019-11-19 23:23:14,143 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199997946] [2019-11-19 23:23:14,144 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-19 23:23:14,144 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-19 23:23:14,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-19 23:23:14,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2019-11-19 23:23:14,145 INFO L87 Difference]: Start difference. First operand 140 states and 193 transitions. Second operand 17 states. [2019-11-19 23:23:17,136 WARN L191 SmtUtils]: Spent 1.81 s on a formula simplification. DAG size of input: 50 DAG size of output: 45 [2019-11-19 23:23:22,977 WARN L191 SmtUtils]: Spent 1.15 s on a formula simplification. DAG size of input: 44 DAG size of output: 43 [2019-11-19 23:23:23,863 WARN L191 SmtUtils]: Spent 610.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 36 [2019-11-19 23:23:25,807 WARN L191 SmtUtils]: Spent 430.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 31 [2019-11-19 23:23:26,610 WARN L191 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 27 [2019-11-19 23:23:26,955 WARN L191 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2019-11-19 23:23:27,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 23:23:27,684 INFO L93 Difference]: Finished difference Result 247 states and 317 transitions. [2019-11-19 23:23:27,687 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-19 23:23:27,687 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 24 [2019-11-19 23:23:27,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 23:23:27,689 INFO L225 Difference]: With dead ends: 247 [2019-11-19 23:23:27,689 INFO L226 Difference]: Without dead ends: 247 [2019-11-19 23:23:27,690 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=223, Invalid=427, Unknown=0, NotChecked=0, Total=650 [2019-11-19 23:23:27,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2019-11-19 23:23:27,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 180. [2019-11-19 23:23:27,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2019-11-19 23:23:27,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 243 transitions. [2019-11-19 23:23:27,699 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 243 transitions. Word has length 24 [2019-11-19 23:23:27,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 23:23:27,700 INFO L462 AbstractCegarLoop]: Abstraction has 180 states and 243 transitions. [2019-11-19 23:23:27,700 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-19 23:23:27,700 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 243 transitions. [2019-11-19 23:23:27,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-11-19 23:23:27,701 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 23:23:27,701 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 23:23:27,905 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-19 23:23:27,905 INFO L410 AbstractCegarLoop]: === Iteration 17 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, cstrncatErr0REQUIRES_VIOLATION, cstrncatErr5REQUIRES_VIOLATION, cstrncatErr7REQUIRES_VIOLATION, cstrncatErr6REQUIRES_VIOLATION, cstrncatErr1REQUIRES_VIOLATION, cstrncatErr3REQUIRES_VIOLATION, cstrncatErr2REQUIRES_VIOLATION, cstrncatErr4REQUIRES_VIOLATION]=== [2019-11-19 23:23:27,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 23:23:27,905 INFO L82 PathProgramCache]: Analyzing trace with hash 1578193777, now seen corresponding path program 1 times [2019-11-19 23:23:27,906 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-19 23:23:27,906 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [2071021616] [2019-11-19 23:23:27,906 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2e59f848-c2b2-4584-aacd-f6a28869cd42/bin/uautomizer/cvc4 Starting monitored process 18 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-19 23:23:28,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 23:23:28,163 INFO L255 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-19 23:23:28,164 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 23:23:28,200 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 23:23:28,200 INFO L377 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 1 case distinctions, treesize of input 9 treesize of output 25 [2019-11-19 23:23:28,200 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 23:23:28,227 INFO L567 ElimStorePlain]: treesize reduction 10, result has 64.3 percent of original size [2019-11-19 23:23:28,228 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-19 23:23:28,228 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:13, output treesize:9 [2019-11-19 23:23:28,306 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-19 23:23:28,306 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-19 23:23:28,782 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-19 23:23:28,783 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2071021616] [2019-11-19 23:23:28,783 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-19 23:23:28,783 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 13 [2019-11-19 23:23:28,783 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637564387] [2019-11-19 23:23:28,783 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-19 23:23:28,783 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-19 23:23:28,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-19 23:23:28,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2019-11-19 23:23:28,784 INFO L87 Difference]: Start difference. First operand 180 states and 243 transitions. Second operand 14 states. [2019-11-19 23:23:29,786 WARN L191 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2019-11-19 23:23:30,246 WARN L191 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2019-11-19 23:23:30,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 23:23:30,727 INFO L93 Difference]: Finished difference Result 291 states and 395 transitions. [2019-11-19 23:23:30,728 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-19 23:23:30,729 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 26 [2019-11-19 23:23:30,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 23:23:30,731 INFO L225 Difference]: With dead ends: 291 [2019-11-19 23:23:30,731 INFO L226 Difference]: Without dead ends: 291 [2019-11-19 23:23:30,732 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=98, Invalid=408, Unknown=0, NotChecked=0, Total=506 [2019-11-19 23:23:30,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2019-11-19 23:23:30,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 186. [2019-11-19 23:23:30,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2019-11-19 23:23:30,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 249 transitions. [2019-11-19 23:23:30,741 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 249 transitions. Word has length 26 [2019-11-19 23:23:30,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 23:23:30,741 INFO L462 AbstractCegarLoop]: Abstraction has 186 states and 249 transitions. [2019-11-19 23:23:30,741 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-19 23:23:30,741 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 249 transitions. [2019-11-19 23:23:30,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-11-19 23:23:30,742 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 23:23:30,742 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 23:23:30,950 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-19 23:23:30,951 INFO L410 AbstractCegarLoop]: === Iteration 18 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, cstrncatErr0REQUIRES_VIOLATION, cstrncatErr5REQUIRES_VIOLATION, cstrncatErr7REQUIRES_VIOLATION, cstrncatErr6REQUIRES_VIOLATION, cstrncatErr1REQUIRES_VIOLATION, cstrncatErr3REQUIRES_VIOLATION, cstrncatErr2REQUIRES_VIOLATION, cstrncatErr4REQUIRES_VIOLATION]=== [2019-11-19 23:23:30,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 23:23:30,951 INFO L82 PathProgramCache]: Analyzing trace with hash 1578193776, now seen corresponding path program 1 times [2019-11-19 23:23:30,951 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-19 23:23:30,952 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [2089992624] [2019-11-19 23:23:30,952 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2e59f848-c2b2-4584-aacd-f6a28869cd42/bin/uautomizer/cvc4 Starting monitored process 19 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-19 23:23:31,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 23:23:31,187 INFO L255 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-19 23:23:31,189 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 23:23:31,205 INFO L343 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2019-11-19 23:23:31,206 INFO L377 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 1 case distinctions, treesize of input 9 treesize of output 11 [2019-11-19 23:23:31,206 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 23:23:31,212 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 23:23:31,212 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-19 23:23:31,213 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:9, output treesize:11 [2019-11-19 23:23:31,260 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-19 23:23:31,260 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-19 23:23:31,304 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-19 23:23:31,304 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2089992624] [2019-11-19 23:23:31,304 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-19 23:23:31,304 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 7] imperfect sequences [] total 7 [2019-11-19 23:23:31,305 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265153676] [2019-11-19 23:23:31,305 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-19 23:23:31,305 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-19 23:23:31,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-19 23:23:31,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2019-11-19 23:23:31,306 INFO L87 Difference]: Start difference. First operand 186 states and 249 transitions. Second operand 8 states. [2019-11-19 23:23:31,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 23:23:31,571 INFO L93 Difference]: Finished difference Result 191 states and 243 transitions. [2019-11-19 23:23:31,572 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-19 23:23:31,572 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 26 [2019-11-19 23:23:31,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 23:23:31,574 INFO L225 Difference]: With dead ends: 191 [2019-11-19 23:23:31,574 INFO L226 Difference]: Without dead ends: 191 [2019-11-19 23:23:31,574 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2019-11-19 23:23:31,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2019-11-19 23:23:31,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 185. [2019-11-19 23:23:31,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2019-11-19 23:23:31,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 237 transitions. [2019-11-19 23:23:31,581 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 237 transitions. Word has length 26 [2019-11-19 23:23:31,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 23:23:31,582 INFO L462 AbstractCegarLoop]: Abstraction has 185 states and 237 transitions. [2019-11-19 23:23:31,582 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-19 23:23:31,582 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 237 transitions. [2019-11-19 23:23:31,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-11-19 23:23:31,583 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 23:23:31,583 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 23:23:31,787 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-19 23:23:31,787 INFO L410 AbstractCegarLoop]: === Iteration 19 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, cstrncatErr0REQUIRES_VIOLATION, cstrncatErr5REQUIRES_VIOLATION, cstrncatErr7REQUIRES_VIOLATION, cstrncatErr6REQUIRES_VIOLATION, cstrncatErr1REQUIRES_VIOLATION, cstrncatErr3REQUIRES_VIOLATION, cstrncatErr2REQUIRES_VIOLATION, cstrncatErr4REQUIRES_VIOLATION]=== [2019-11-19 23:23:31,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 23:23:31,787 INFO L82 PathProgramCache]: Analyzing trace with hash -1316846349, now seen corresponding path program 1 times [2019-11-19 23:23:31,788 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-19 23:23:31,788 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1374192539] [2019-11-19 23:23:31,788 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2e59f848-c2b2-4584-aacd-f6a28869cd42/bin/uautomizer/cvc4 Starting monitored process 20 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-19 23:23:31,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 23:23:31,932 INFO L255 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-19 23:23:31,933 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 23:23:31,952 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-19 23:23:31,952 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-19 23:23:32,010 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-19 23:23:32,010 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1374192539] [2019-11-19 23:23:32,011 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-19 23:23:32,011 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 7 [2019-11-19 23:23:32,011 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733287975] [2019-11-19 23:23:32,011 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-19 23:23:32,012 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-19 23:23:32,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-19 23:23:32,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-11-19 23:23:32,012 INFO L87 Difference]: Start difference. First operand 185 states and 237 transitions. Second operand 7 states. [2019-11-19 23:23:32,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 23:23:32,151 INFO L93 Difference]: Finished difference Result 302 states and 378 transitions. [2019-11-19 23:23:32,152 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-19 23:23:32,152 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2019-11-19 23:23:32,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 23:23:32,154 INFO L225 Difference]: With dead ends: 302 [2019-11-19 23:23:32,154 INFO L226 Difference]: Without dead ends: 296 [2019-11-19 23:23:32,186 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-11-19 23:23:32,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2019-11-19 23:23:32,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 185. [2019-11-19 23:23:32,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2019-11-19 23:23:32,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 235 transitions. [2019-11-19 23:23:32,201 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 235 transitions. Word has length 27 [2019-11-19 23:23:32,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 23:23:32,202 INFO L462 AbstractCegarLoop]: Abstraction has 185 states and 235 transitions. [2019-11-19 23:23:32,202 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-19 23:23:32,202 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 235 transitions. [2019-11-19 23:23:32,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-11-19 23:23:32,204 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 23:23:32,204 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 23:23:32,407 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-19 23:23:32,407 INFO L410 AbstractCegarLoop]: === Iteration 20 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, cstrncatErr0REQUIRES_VIOLATION, cstrncatErr5REQUIRES_VIOLATION, cstrncatErr7REQUIRES_VIOLATION, cstrncatErr6REQUIRES_VIOLATION, cstrncatErr1REQUIRES_VIOLATION, cstrncatErr3REQUIRES_VIOLATION, cstrncatErr2REQUIRES_VIOLATION, cstrncatErr4REQUIRES_VIOLATION]=== [2019-11-19 23:23:32,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 23:23:32,407 INFO L82 PathProgramCache]: Analyzing trace with hash 1679413659, now seen corresponding path program 2 times [2019-11-19 23:23:32,408 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-19 23:23:32,408 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [856058183] [2019-11-19 23:23:32,408 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2e59f848-c2b2-4584-aacd-f6a28869cd42/bin/uautomizer/cvc4 Starting monitored process 21 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-19 23:23:32,721 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-19 23:23:32,722 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-19 23:23:32,724 INFO L255 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 28 conjunts are in the unsatisfiable core [2019-11-19 23:23:32,725 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 23:23:32,738 INFO L392 ElimStorePlain]: Different costs {0=[|v_#length_46|], 1=[|v_#valid_113|]} [2019-11-19 23:23:32,746 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-19 23:23:32,748 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-19 23:23:32,749 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2019-11-19 23:23:32,750 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 23:23:32,787 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 23:23:32,791 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-19 23:23:32,796 INFO L377 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 5 treesize of output 3 [2019-11-19 23:23:32,796 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-19 23:23:32,832 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 23:23:32,832 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-19 23:23:32,833 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2019-11-19 23:23:33,046 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 23:23:33,046 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 60 [2019-11-19 23:23:33,047 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 23:23:33,048 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 23:23:33,050 INFO L496 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-19 23:23:33,193 WARN L191 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 30 [2019-11-19 23:23:33,193 INFO L567 ElimStorePlain]: treesize reduction 16, result has 75.4 percent of original size [2019-11-19 23:23:33,205 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2019-11-19 23:23:33,206 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-19 23:23:33,255 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 23:23:33,256 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-19 23:23:33,256 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:78, output treesize:45 [2019-11-19 23:23:33,331 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2019-11-19 23:23:33,332 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 23:23:33,383 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 23:23:33,383 INFO L496 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-11-19 23:23:33,384 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:52, output treesize:48 [2019-11-19 23:23:33,716 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-19 23:23:33,717 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2019-11-19 23:23:33,718 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 23:23:33,743 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 23:23:33,747 INFO L496 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-19 23:23:33,747 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:49, output treesize:5 [2019-11-19 23:23:33,789 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-19 23:23:33,789 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-19 23:23:34,316 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 17 [2019-11-19 23:23:34,389 INFO L377 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 27 treesize of output 25 [2019-11-19 23:23:34,391 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-19 23:23:34,400 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 23:23:34,400 INFO L496 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-19 23:23:34,496 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 23:23:34,496 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-19 23:23:34,496 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:52, output treesize:41 [2019-11-19 23:23:35,974 WARN L191 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2019-11-19 23:23:35,981 INFO L392 ElimStorePlain]: Different costs {1=[|#valid|], 2=[|#length|]} [2019-11-19 23:23:36,018 INFO L377 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 10 treesize of output 8 [2019-11-19 23:23:36,018 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 23:23:36,255 WARN L191 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 27 [2019-11-19 23:23:36,256 INFO L567 ElimStorePlain]: treesize reduction 6, result has 90.2 percent of original size [2019-11-19 23:23:36,262 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-19 23:23:36,263 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-19 23:23:36,341 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 23:23:36,342 INFO L496 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-19 23:23:36,342 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 5 variables, input treesize:67, output treesize:44 [2019-11-19 23:23:36,596 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-19 23:23:36,596 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [856058183] [2019-11-19 23:23:36,596 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 23:23:36,596 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2019-11-19 23:23:36,596 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475431012] [2019-11-19 23:23:36,597 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-11-19 23:23:36,597 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-19 23:23:36,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-11-19 23:23:36,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2019-11-19 23:23:36,598 INFO L87 Difference]: Start difference. First operand 185 states and 235 transitions. Second operand 22 states. [2019-11-19 23:23:37,825 WARN L191 SmtUtils]: Spent 458.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2019-11-19 23:23:38,511 WARN L191 SmtUtils]: Spent 415.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2019-11-19 23:23:39,450 WARN L191 SmtUtils]: Spent 298.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2019-11-19 23:23:40,061 WARN L191 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2019-11-19 23:23:40,649 WARN L191 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2019-11-19 23:23:41,070 WARN L191 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2019-11-19 23:23:41,439 WARN L191 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2019-11-19 23:23:41,901 WARN L191 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2019-11-19 23:23:42,383 WARN L191 SmtUtils]: Spent 246.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2019-11-19 23:23:42,695 WARN L191 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 54 [2019-11-19 23:23:43,072 WARN L191 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2019-11-19 23:23:43,986 WARN L191 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2019-11-19 23:23:44,644 WARN L191 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2019-11-19 23:23:45,062 WARN L191 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 45 [2019-11-19 23:23:45,869 WARN L191 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 57 [2019-11-19 23:23:46,642 WARN L191 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 60 [2019-11-19 23:23:50,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 23:23:50,066 INFO L93 Difference]: Finished difference Result 247 states and 298 transitions. [2019-11-19 23:23:50,068 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-11-19 23:23:50,069 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 27 [2019-11-19 23:23:50,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 23:23:50,070 INFO L225 Difference]: With dead ends: 247 [2019-11-19 23:23:50,071 INFO L226 Difference]: Without dead ends: 247 [2019-11-19 23:23:50,071 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 28 SyntacticMatches, 5 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 11.2s TimeCoverageRelationStatistics Valid=345, Invalid=1547, Unknown=0, NotChecked=0, Total=1892 [2019-11-19 23:23:50,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2019-11-19 23:23:50,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 171. [2019-11-19 23:23:50,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2019-11-19 23:23:50,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 215 transitions. [2019-11-19 23:23:50,085 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 215 transitions. Word has length 27 [2019-11-19 23:23:50,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 23:23:50,085 INFO L462 AbstractCegarLoop]: Abstraction has 171 states and 215 transitions. [2019-11-19 23:23:50,085 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-11-19 23:23:50,085 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 215 transitions. [2019-11-19 23:23:50,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-11-19 23:23:50,086 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 23:23:50,086 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 23:23:50,289 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-19 23:23:50,290 INFO L410 AbstractCegarLoop]: === Iteration 21 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, cstrncatErr0REQUIRES_VIOLATION, cstrncatErr5REQUIRES_VIOLATION, cstrncatErr7REQUIRES_VIOLATION, cstrncatErr6REQUIRES_VIOLATION, cstrncatErr1REQUIRES_VIOLATION, cstrncatErr3REQUIRES_VIOLATION, cstrncatErr2REQUIRES_VIOLATION, cstrncatErr4REQUIRES_VIOLATION]=== [2019-11-19 23:23:50,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 23:23:50,290 INFO L82 PathProgramCache]: Analyzing trace with hash -1436639625, now seen corresponding path program 1 times [2019-11-19 23:23:50,290 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-19 23:23:50,290 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1746217122] [2019-11-19 23:23:50,290 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2e59f848-c2b2-4584-aacd-f6a28869cd42/bin/uautomizer/cvc4 Starting monitored process 22 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-19 23:23:50,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 23:23:50,524 INFO L255 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 19 conjunts are in the unsatisfiable core [2019-11-19 23:23:50,525 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 23:23:50,563 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-19 23:23:50,599 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 23:23:50,599 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 25 [2019-11-19 23:23:50,599 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 23:23:50,708 WARN L191 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 24 [2019-11-19 23:23:50,709 INFO L567 ElimStorePlain]: treesize reduction 10, result has 75.6 percent of original size [2019-11-19 23:23:50,710 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-19 23:23:50,710 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:22 [2019-11-19 23:23:51,390 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:23:51,390 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-19 23:23:54,088 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:23:54,088 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1746217122] [2019-11-19 23:23:54,088 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 23:23:54,088 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 23 [2019-11-19 23:23:54,088 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827984265] [2019-11-19 23:23:54,089 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-11-19 23:23:54,089 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-19 23:23:54,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-11-19 23:23:54,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2019-11-19 23:23:54,090 INFO L87 Difference]: Start difference. First operand 171 states and 215 transitions. Second operand 23 states. [2019-11-19 23:23:56,069 WARN L191 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2019-11-19 23:23:56,601 WARN L191 SmtUtils]: Spent 329.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2019-11-19 23:23:57,638 WARN L191 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 31 [2019-11-19 23:23:58,368 WARN L191 SmtUtils]: Spent 459.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 38 [2019-11-19 23:23:58,904 WARN L191 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2019-11-19 23:23:59,107 WARN L191 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 31 [2019-11-19 23:23:59,556 WARN L191 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2019-11-19 23:24:00,080 WARN L191 SmtUtils]: Spent 302.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2019-11-19 23:24:00,890 WARN L191 SmtUtils]: Spent 557.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2019-11-19 23:24:01,189 WARN L191 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2019-11-19 23:24:01,894 WARN L191 SmtUtils]: Spent 421.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 40 [2019-11-19 23:24:02,612 WARN L191 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2019-11-19 23:24:03,620 WARN L191 SmtUtils]: Spent 613.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2019-11-19 23:24:03,947 WARN L191 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2019-11-19 23:24:05,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 23:24:05,120 INFO L93 Difference]: Finished difference Result 306 states and 372 transitions. [2019-11-19 23:24:05,124 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-11-19 23:24:05,124 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2019-11-19 23:24:05,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 23:24:05,126 INFO L225 Difference]: With dead ends: 306 [2019-11-19 23:24:05,126 INFO L226 Difference]: Without dead ends: 306 [2019-11-19 23:24:05,128 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 469 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=597, Invalid=1565, Unknown=0, NotChecked=0, Total=2162 [2019-11-19 23:24:05,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2019-11-19 23:24:05,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 190. [2019-11-19 23:24:05,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2019-11-19 23:24:05,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 238 transitions. [2019-11-19 23:24:05,137 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 238 transitions. Word has length 26 [2019-11-19 23:24:05,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 23:24:05,137 INFO L462 AbstractCegarLoop]: Abstraction has 190 states and 238 transitions. [2019-11-19 23:24:05,137 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-11-19 23:24:05,138 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 238 transitions. [2019-11-19 23:24:05,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-11-19 23:24:05,138 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 23:24:05,139 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 23:24:05,347 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-19 23:24:05,348 INFO L410 AbstractCegarLoop]: === Iteration 22 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, cstrncatErr0REQUIRES_VIOLATION, cstrncatErr5REQUIRES_VIOLATION, cstrncatErr7REQUIRES_VIOLATION, cstrncatErr6REQUIRES_VIOLATION, cstrncatErr1REQUIRES_VIOLATION, cstrncatErr3REQUIRES_VIOLATION, cstrncatErr2REQUIRES_VIOLATION, cstrncatErr4REQUIRES_VIOLATION]=== [2019-11-19 23:24:05,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 23:24:05,348 INFO L82 PathProgramCache]: Analyzing trace with hash -1665049608, now seen corresponding path program 3 times [2019-11-19 23:24:05,348 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-19 23:24:05,348 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1011736989] [2019-11-19 23:24:05,348 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2e59f848-c2b2-4584-aacd-f6a28869cd42/bin/uautomizer/cvc4 Starting monitored process 23 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-19 23:24:05,688 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-19 23:24:05,688 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-19 23:24:05,691 INFO L255 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 27 conjunts are in the unsatisfiable core [2019-11-19 23:24:05,692 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 23:24:05,699 INFO L392 ElimStorePlain]: Different costs {0=[|v_#length_50|], 1=[|v_#valid_122|]} [2019-11-19 23:24:05,709 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-19 23:24:05,713 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2019-11-19 23:24:05,713 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 23:24:05,752 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 23:24:05,762 INFO L377 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 10 treesize of output 8 [2019-11-19 23:24:05,762 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-19 23:24:05,800 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 23:24:05,800 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-19 23:24:05,801 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:31, output treesize:28 [2019-11-19 23:24:07,301 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:24:07,301 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-19 23:24:10,769 WARN L191 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2019-11-19 23:24:11,306 WARN L191 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2019-11-19 23:24:11,312 INFO L392 ElimStorePlain]: Different costs {1=[|#valid|], 2=[|#length|]} [2019-11-19 23:24:11,319 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-19 23:24:11,320 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 23:24:11,321 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 23:24:11,321 INFO L464 ElimStorePlain]: Eliminatee |#length| vanished before elimination [2019-11-19 23:24:11,322 INFO L496 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-19 23:24:11,322 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:59, output treesize:1 [2019-11-19 23:24:11,330 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:24:11,331 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1011736989] [2019-11-19 23:24:11,331 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 23:24:11,331 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 27 [2019-11-19 23:24:11,331 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554448319] [2019-11-19 23:24:11,332 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-11-19 23:24:11,332 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-19 23:24:11,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-11-19 23:24:11,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=637, Unknown=0, NotChecked=0, Total=756 [2019-11-19 23:24:11,333 INFO L87 Difference]: Start difference. First operand 190 states and 238 transitions. Second operand 28 states. [2019-11-19 23:24:12,460 WARN L191 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2019-11-19 23:24:13,540 WARN L191 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2019-11-19 23:24:13,917 WARN L191 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2019-11-19 23:24:14,238 WARN L191 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 31 [2019-11-19 23:24:14,654 WARN L191 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2019-11-19 23:24:15,039 WARN L191 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 32 [2019-11-19 23:24:17,475 WARN L191 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 37 [2019-11-19 23:24:19,124 WARN L191 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 33 [2019-11-19 23:24:19,542 WARN L191 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 37 [2019-11-19 23:24:20,192 WARN L191 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 31 [2019-11-19 23:24:21,053 WARN L191 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 37 [2019-11-19 23:24:23,010 WARN L191 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 36 [2019-11-19 23:24:24,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 23:24:24,905 INFO L93 Difference]: Finished difference Result 354 states and 424 transitions. [2019-11-19 23:24:24,908 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-11-19 23:24:24,908 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2019-11-19 23:24:24,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 23:24:24,910 INFO L225 Difference]: With dead ends: 354 [2019-11-19 23:24:24,910 INFO L226 Difference]: Without dead ends: 354 [2019-11-19 23:24:24,911 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 12.9s TimeCoverageRelationStatistics Valid=374, Invalid=2076, Unknown=0, NotChecked=0, Total=2450 [2019-11-19 23:24:24,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2019-11-19 23:24:24,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 243. [2019-11-19 23:24:24,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 243 states. [2019-11-19 23:24:24,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 310 transitions. [2019-11-19 23:24:24,921 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 310 transitions. Word has length 31 [2019-11-19 23:24:24,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 23:24:24,921 INFO L462 AbstractCegarLoop]: Abstraction has 243 states and 310 transitions. [2019-11-19 23:24:24,921 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-11-19 23:24:24,921 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 310 transitions. [2019-11-19 23:24:24,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-11-19 23:24:24,922 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 23:24:24,922 INFO L410 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 23:24:25,126 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-19 23:24:25,126 INFO L410 AbstractCegarLoop]: === Iteration 23 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, cstrncatErr0REQUIRES_VIOLATION, cstrncatErr5REQUIRES_VIOLATION, cstrncatErr7REQUIRES_VIOLATION, cstrncatErr6REQUIRES_VIOLATION, cstrncatErr1REQUIRES_VIOLATION, cstrncatErr3REQUIRES_VIOLATION, cstrncatErr2REQUIRES_VIOLATION, cstrncatErr4REQUIRES_VIOLATION]=== [2019-11-19 23:24:25,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 23:24:25,127 INFO L82 PathProgramCache]: Analyzing trace with hash 294648824, now seen corresponding path program 1 times [2019-11-19 23:24:25,127 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-19 23:24:25,127 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [390506521] [2019-11-19 23:24:25,127 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2e59f848-c2b2-4584-aacd-f6a28869cd42/bin/uautomizer/cvc4 Starting monitored process 24 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-19 23:24:25,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 23:24:25,308 INFO L255 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-19 23:24:25,308 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 23:24:25,332 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 23:24:25,332 INFO L377 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 1 case distinctions, treesize of input 9 treesize of output 25 [2019-11-19 23:24:25,332 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 23:24:25,367 INFO L567 ElimStorePlain]: treesize reduction 10, result has 68.8 percent of original size [2019-11-19 23:24:25,368 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-19 23:24:25,368 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:17, output treesize:13 [2019-11-19 23:24:25,603 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-19 23:24:25,604 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-19 23:24:26,950 WARN L191 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2019-11-19 23:24:27,251 WARN L191 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 25 [2019-11-19 23:24:27,266 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-19 23:24:27,266 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [390506521] [2019-11-19 23:24:27,266 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 23:24:27,266 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 16 [2019-11-19 23:24:27,266 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045173246] [2019-11-19 23:24:27,266 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-19 23:24:27,267 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-19 23:24:27,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-19 23:24:27,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2019-11-19 23:24:27,267 INFO L87 Difference]: Start difference. First operand 243 states and 310 transitions. Second operand 17 states. [2019-11-19 23:24:29,196 WARN L191 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 16 [2019-11-19 23:24:29,591 WARN L191 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 19 [2019-11-19 23:24:30,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 23:24:30,305 INFO L93 Difference]: Finished difference Result 282 states and 353 transitions. [2019-11-19 23:24:30,309 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-19 23:24:30,309 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 30 [2019-11-19 23:24:30,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 23:24:30,311 INFO L225 Difference]: With dead ends: 282 [2019-11-19 23:24:30,311 INFO L226 Difference]: Without dead ends: 282 [2019-11-19 23:24:30,312 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=157, Invalid=349, Unknown=0, NotChecked=0, Total=506 [2019-11-19 23:24:30,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2019-11-19 23:24:30,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 230. [2019-11-19 23:24:30,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 230 states. [2019-11-19 23:24:30,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 292 transitions. [2019-11-19 23:24:30,320 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 292 transitions. Word has length 30 [2019-11-19 23:24:30,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 23:24:30,320 INFO L462 AbstractCegarLoop]: Abstraction has 230 states and 292 transitions. [2019-11-19 23:24:30,321 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-19 23:24:30,321 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 292 transitions. [2019-11-19 23:24:30,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-11-19 23:24:30,321 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 23:24:30,322 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 23:24:30,525 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-19 23:24:30,528 INFO L410 AbstractCegarLoop]: === Iteration 24 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, cstrncatErr0REQUIRES_VIOLATION, cstrncatErr5REQUIRES_VIOLATION, cstrncatErr7REQUIRES_VIOLATION, cstrncatErr6REQUIRES_VIOLATION, cstrncatErr1REQUIRES_VIOLATION, cstrncatErr3REQUIRES_VIOLATION, cstrncatErr2REQUIRES_VIOLATION, cstrncatErr4REQUIRES_VIOLATION]=== [2019-11-19 23:24:30,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 23:24:30,528 INFO L82 PathProgramCache]: Analyzing trace with hash -1661851522, now seen corresponding path program 1 times [2019-11-19 23:24:30,528 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-19 23:24:30,528 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [863789460] [2019-11-19 23:24:30,528 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2e59f848-c2b2-4584-aacd-f6a28869cd42/bin/uautomizer/cvc4 Starting monitored process 25 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-19 23:24:30,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 23:24:30,652 INFO L255 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-19 23:24:30,653 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 23:24:30,698 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-19 23:24:30,699 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-19 23:24:30,705 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-19 23:24:30,706 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [863789460] [2019-11-19 23:24:30,706 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-19 23:24:30,706 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 6 [2019-11-19 23:24:30,706 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89420990] [2019-11-19 23:24:30,706 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-19 23:24:30,706 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-19 23:24:30,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-19 23:24:30,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-11-19 23:24:30,707 INFO L87 Difference]: Start difference. First operand 230 states and 292 transitions. Second operand 6 states. [2019-11-19 23:24:30,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 23:24:30,821 INFO L93 Difference]: Finished difference Result 396 states and 486 transitions. [2019-11-19 23:24:30,821 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-19 23:24:30,821 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 32 [2019-11-19 23:24:30,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 23:24:30,824 INFO L225 Difference]: With dead ends: 396 [2019-11-19 23:24:30,824 INFO L226 Difference]: Without dead ends: 396 [2019-11-19 23:24:30,824 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-11-19 23:24:30,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2019-11-19 23:24:30,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 372. [2019-11-19 23:24:30,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 372 states. [2019-11-19 23:24:30,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 465 transitions. [2019-11-19 23:24:30,835 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 465 transitions. Word has length 32 [2019-11-19 23:24:30,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 23:24:30,836 INFO L462 AbstractCegarLoop]: Abstraction has 372 states and 465 transitions. [2019-11-19 23:24:30,836 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-19 23:24:30,836 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 465 transitions. [2019-11-19 23:24:30,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-11-19 23:24:30,837 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 23:24:30,837 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 23:24:31,047 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-19 23:24:31,048 INFO L410 AbstractCegarLoop]: === Iteration 25 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, cstrncatErr0REQUIRES_VIOLATION, cstrncatErr5REQUIRES_VIOLATION, cstrncatErr7REQUIRES_VIOLATION, cstrncatErr6REQUIRES_VIOLATION, cstrncatErr1REQUIRES_VIOLATION, cstrncatErr3REQUIRES_VIOLATION, cstrncatErr2REQUIRES_VIOLATION, cstrncatErr4REQUIRES_VIOLATION]=== [2019-11-19 23:24:31,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 23:24:31,061 INFO L82 PathProgramCache]: Analyzing trace with hash -1795865028, now seen corresponding path program 1 times [2019-11-19 23:24:31,061 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-19 23:24:31,062 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [935195253] [2019-11-19 23:24:31,062 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2e59f848-c2b2-4584-aacd-f6a28869cd42/bin/uautomizer/cvc4 Starting monitored process 26 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-19 23:24:31,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 23:24:31,261 INFO L255 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 19 conjunts are in the unsatisfiable core [2019-11-19 23:24:31,262 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 23:24:31,276 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2019-11-19 23:24:31,277 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 23:24:31,281 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 23:24:31,282 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-19 23:24:31,282 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:16, output treesize:12 [2019-11-19 23:24:31,388 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2019-11-19 23:24:31,388 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 23:24:31,390 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 23:24:31,391 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-19 23:24:31,391 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:17, output treesize:5 [2019-11-19 23:24:31,405 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-19 23:24:31,406 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-19 23:24:31,838 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-19 23:24:31,839 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: incompatible size at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.ArrayIndexBasedCostEstimation.analyzeCosts(ArrayIndexBasedCostEstimation.java:211) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.ArrayIndexBasedCostEstimation.computeCostEstimation(ArrayIndexBasedCostEstimation.java:152) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.ArrayIndexBasedCostEstimation.(ArrayIndexBasedCostEstimation.java:64) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.computeCostEstimation(ElimStorePlain.java:519) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.doElimAllRec(ElimStorePlain.java:390) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.startRecursiveElimination(ElimStorePlain.java:216) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.PartialQuantifierElimination.elim(PartialQuantifierElimination.java:306) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.PartialQuantifierElimination.tryToEliminate(PartialQuantifierElimination.java:102) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer$QuantifierEliminationPostprocessor.postprocess(IterativePredicateTransformer.java:246) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:440) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeBackwardSequence(IterativePredicateTransformer.java:419) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeWeakestPreconditionSequence(IterativePredicateTransformer.java:291) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:334) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:177) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:162) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:57) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:242) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:166) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:75) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:463) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:419) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:368) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterate(TraceAbstractionStarter.java:333) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:171) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:123) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:120) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2019-11-19 23:24:31,842 INFO L168 Benchmark]: Toolchain (without parser) took 165345.45 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 177.2 MB). Free memory was 940.7 MB in the beginning and 1.1 GB in the end (delta: -158.8 MB). Peak memory consumption was 18.4 MB. Max. memory is 11.5 GB. [2019-11-19 23:24:31,842 INFO L168 Benchmark]: CDTParser took 1.04 ms. Allocated memory is still 1.0 GB. Free memory is still 962.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-19 23:24:31,842 INFO L168 Benchmark]: CACSL2BoogieTranslator took 615.52 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 135.3 MB). Free memory was 940.7 MB in the beginning and 1.1 GB in the end (delta: -178.5 MB). Peak memory consumption was 19.3 MB. Max. memory is 11.5 GB. [2019-11-19 23:24:31,843 INFO L168 Benchmark]: Boogie Preprocessor took 80.66 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 6.7 MB). Peak memory consumption was 6.7 MB. Max. memory is 11.5 GB. [2019-11-19 23:24:31,843 INFO L168 Benchmark]: RCFGBuilder took 859.69 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 54.6 MB). Peak memory consumption was 54.6 MB. Max. memory is 11.5 GB. [2019-11-19 23:24:31,843 INFO L168 Benchmark]: TraceAbstraction took 163785.08 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 41.9 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: -41.6 MB). Peak memory consumption was 316.4 kB. Max. memory is 11.5 GB. [2019-11-19 23:24:31,844 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.04 ms. Allocated memory is still 1.0 GB. Free memory is still 962.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 615.52 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 135.3 MB). Free memory was 940.7 MB in the beginning and 1.1 GB in the end (delta: -178.5 MB). Peak memory consumption was 19.3 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 80.66 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 6.7 MB). Peak memory consumption was 6.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 859.69 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 54.6 MB). Peak memory consumption was 54.6 MB. Max. memory is 11.5 GB. * TraceAbstraction took 163785.08 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 41.9 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: -41.6 MB). Peak memory consumption was 316.4 kB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: incompatible size de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: incompatible size: de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.ArrayIndexBasedCostEstimation.analyzeCosts(ArrayIndexBasedCostEstimation.java:211) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...