./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/openbsd_cstrcmp-alloca-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 6b5699aa 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_2b40fcc5-5635-4b73-8562-7031f87dee36/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_2b40fcc5-5635-4b73-8562-7031f87dee36/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_2b40fcc5-5635-4b73-8562-7031f87dee36/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_2b40fcc5-5635-4b73-8562-7031f87dee36/bin/uautomizer/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/openbsd_cstrcmp-alloca-1.i -s /tmp/vcloud-vcloud-master/worker/run_dir_2b40fcc5-5635-4b73-8562-7031f87dee36/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_2b40fcc5-5635-4b73-8562-7031f87dee36/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 f68b319d77fa756392ca29e618a1e0accd9b6c9e ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 0.1.24-6b5699a [2019-11-25 08:53:53,167 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-25 08:53:53,169 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-25 08:53:53,179 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-25 08:53:53,179 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-25 08:53:53,180 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-25 08:53:53,182 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-25 08:53:53,184 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-25 08:53:53,187 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-25 08:53:53,190 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-25 08:53:53,191 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-25 08:53:53,192 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-25 08:53:53,194 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-25 08:53:53,205 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-25 08:53:53,206 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-25 08:53:53,207 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-25 08:53:53,208 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-25 08:53:53,208 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-25 08:53:53,210 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-25 08:53:53,212 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-25 08:53:53,216 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-25 08:53:53,221 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-25 08:53:53,222 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-25 08:53:53,223 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-25 08:53:53,225 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-25 08:53:53,231 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-25 08:53:53,231 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-25 08:53:53,232 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-25 08:53:53,232 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-25 08:53:53,233 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-25 08:53:53,234 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-25 08:53:53,234 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-25 08:53:53,235 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-25 08:53:53,237 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-25 08:53:53,238 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-25 08:53:53,239 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-25 08:53:53,240 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-25 08:53:53,240 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-25 08:53:53,240 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-25 08:53:53,242 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-25 08:53:53,244 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-25 08:53:53,245 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_2b40fcc5-5635-4b73-8562-7031f87dee36/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2019-11-25 08:53:53,263 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-25 08:53:53,263 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-25 08:53:53,265 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-25 08:53:53,265 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-25 08:53:53,265 INFO L138 SettingsManager]: * Use SBE=true [2019-11-25 08:53:53,266 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-25 08:53:53,266 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-25 08:53:53,266 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-11-25 08:53:53,266 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-25 08:53:53,267 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-25 08:53:53,267 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-25 08:53:53,267 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2019-11-25 08:53:53,267 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2019-11-25 08:53:53,268 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2019-11-25 08:53:53,268 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-25 08:53:53,268 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-25 08:53:53,268 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2019-11-25 08:53:53,269 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2019-11-25 08:53:53,269 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-25 08:53:53,269 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-25 08:53:53,270 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-25 08:53:53,270 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-25 08:53:53,270 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-25 08:53:53,270 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-25 08:53:53,271 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-25 08:53:53,271 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-25 08:53:53,271 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-25 08:53:53,271 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2019-11-25 08:53:53,272 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2019-11-25 08:53:53,272 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-25 08:53:53,272 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_2b40fcc5-5635-4b73-8562-7031f87dee36/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 -> f68b319d77fa756392ca29e618a1e0accd9b6c9e [2019-11-25 08:53:53,411 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-25 08:53:53,425 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-25 08:53:53,428 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-25 08:53:53,431 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-25 08:53:53,431 INFO L275 PluginConnector]: CDTParser initialized [2019-11-25 08:53:53,432 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_2b40fcc5-5635-4b73-8562-7031f87dee36/bin/uautomizer/../../sv-benchmarks/c/array-memsafety/openbsd_cstrcmp-alloca-1.i [2019-11-25 08:53:53,488 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_2b40fcc5-5635-4b73-8562-7031f87dee36/bin/uautomizer/data/9dd22eb8f/677ecb045df8422f8a16f69a214837db/FLAG05d5efa89 [2019-11-25 08:53:54,007 INFO L306 CDTParser]: Found 1 translation units. [2019-11-25 08:53:54,012 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_2b40fcc5-5635-4b73-8562-7031f87dee36/sv-benchmarks/c/array-memsafety/openbsd_cstrcmp-alloca-1.i [2019-11-25 08:53:54,031 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_2b40fcc5-5635-4b73-8562-7031f87dee36/bin/uautomizer/data/9dd22eb8f/677ecb045df8422f8a16f69a214837db/FLAG05d5efa89 [2019-11-25 08:53:54,502 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_2b40fcc5-5635-4b73-8562-7031f87dee36/bin/uautomizer/data/9dd22eb8f/677ecb045df8422f8a16f69a214837db [2019-11-25 08:53:54,505 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-25 08:53:54,506 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-25 08:53:54,507 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-25 08:53:54,507 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-25 08:53:54,510 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-25 08:53:54,510 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:53:54" (1/1) ... [2019-11-25 08:53:54,512 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f36ddbd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:53:54, skipping insertion in model container [2019-11-25 08:53:54,512 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:53:54" (1/1) ... [2019-11-25 08:53:54,519 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-25 08:53:54,557 INFO L179 MainTranslator]: Built tables and reachable declarations [2019-11-25 08:53:54,940 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-25 08:53:54,953 INFO L201 MainTranslator]: Completed pre-run [2019-11-25 08:53:54,998 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-25 08:53:55,045 INFO L205 MainTranslator]: Completed translation [2019-11-25 08:53:55,046 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:53:55 WrapperNode [2019-11-25 08:53:55,046 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-25 08:53:55,047 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-25 08:53:55,047 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-25 08:53:55,047 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-25 08:53:55,061 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:53:55" (1/1) ... [2019-11-25 08:53:55,061 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:53:55" (1/1) ... [2019-11-25 08:53:55,081 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:53:55" (1/1) ... [2019-11-25 08:53:55,082 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:53:55" (1/1) ... [2019-11-25 08:53:55,101 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:53:55" (1/1) ... [2019-11-25 08:53:55,106 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:53:55" (1/1) ... [2019-11-25 08:53:55,111 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:53:55" (1/1) ... [2019-11-25 08:53:55,118 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-25 08:53:55,130 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-25 08:53:55,130 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-25 08:53:55,130 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-25 08:53:55,131 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:53:55" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2b40fcc5-5635-4b73-8562-7031f87dee36/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 [2019-11-25 08:53:55,199 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-25 08:53:55,200 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-25 08:53:55,200 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.setCurrentRoundingMode [2019-11-25 08:53:55,200 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2019-11-25 08:53:55,201 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2019-11-25 08:53:55,201 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2019-11-25 08:53:55,201 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2019-11-25 08:53:55,201 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2019-11-25 08:53:55,202 INFO L138 BoogieDeclarations]: Found implementation of procedure cstrcmp [2019-11-25 08:53:55,202 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-25 08:53:55,202 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2019-11-25 08:53:55,203 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2019-11-25 08:53:55,203 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2019-11-25 08:53:55,203 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2019-11-25 08:53:55,203 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2019-11-25 08:53:55,204 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2019-11-25 08:53:55,204 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2019-11-25 08:53:55,204 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2019-11-25 08:53:55,204 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2019-11-25 08:53:55,205 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2019-11-25 08:53:55,205 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2019-11-25 08:53:55,205 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2019-11-25 08:53:55,205 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2019-11-25 08:53:55,205 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2019-11-25 08:53:55,206 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2019-11-25 08:53:55,206 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2019-11-25 08:53:55,206 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2019-11-25 08:53:55,206 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2019-11-25 08:53:55,206 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2019-11-25 08:53:55,207 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2019-11-25 08:53:55,207 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2019-11-25 08:53:55,207 INFO L130 BoogieDeclarations]: Found specification of procedure select [2019-11-25 08:53:55,207 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2019-11-25 08:53:55,207 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2019-11-25 08:53:55,208 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2019-11-25 08:53:55,208 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2019-11-25 08:53:55,208 INFO L130 BoogieDeclarations]: Found specification of procedure random [2019-11-25 08:53:55,208 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2019-11-25 08:53:55,208 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2019-11-25 08:53:55,209 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2019-11-25 08:53:55,209 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2019-11-25 08:53:55,209 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2019-11-25 08:53:55,209 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2019-11-25 08:53:55,209 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2019-11-25 08:53:55,210 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2019-11-25 08:53:55,210 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2019-11-25 08:53:55,210 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2019-11-25 08:53:55,210 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2019-11-25 08:53:55,210 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2019-11-25 08:53:55,211 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2019-11-25 08:53:55,211 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2019-11-25 08:53:55,211 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2019-11-25 08:53:55,211 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2019-11-25 08:53:55,211 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2019-11-25 08:53:55,212 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2019-11-25 08:53:55,212 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2019-11-25 08:53:55,212 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2019-11-25 08:53:55,212 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2019-11-25 08:53:55,212 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2019-11-25 08:53:55,213 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2019-11-25 08:53:55,213 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2019-11-25 08:53:55,213 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2019-11-25 08:53:55,213 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2019-11-25 08:53:55,213 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2019-11-25 08:53:55,214 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2019-11-25 08:53:55,214 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-11-25 08:53:55,214 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2019-11-25 08:53:55,214 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2019-11-25 08:53:55,214 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-11-25 08:53:55,214 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2019-11-25 08:53:55,215 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2019-11-25 08:53:55,215 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2019-11-25 08:53:55,215 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2019-11-25 08:53:55,215 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2019-11-25 08:53:55,216 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2019-11-25 08:53:55,216 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2019-11-25 08:53:55,216 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2019-11-25 08:53:55,216 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-25 08:53:55,216 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2019-11-25 08:53:55,217 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2019-11-25 08:53:55,217 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2019-11-25 08:53:55,217 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2019-11-25 08:53:55,217 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2019-11-25 08:53:55,217 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2019-11-25 08:53:55,218 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2019-11-25 08:53:55,218 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2019-11-25 08:53:55,218 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2019-11-25 08:53:55,218 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2019-11-25 08:53:55,218 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2019-11-25 08:53:55,218 INFO L130 BoogieDeclarations]: Found specification of procedure system [2019-11-25 08:53:55,219 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2019-11-25 08:53:55,219 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2019-11-25 08:53:55,219 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2019-11-25 08:53:55,219 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2019-11-25 08:53:55,219 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2019-11-25 08:53:55,220 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2019-11-25 08:53:55,220 INFO L130 BoogieDeclarations]: Found specification of procedure div [2019-11-25 08:53:55,220 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2019-11-25 08:53:55,220 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2019-11-25 08:53:55,220 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2019-11-25 08:53:55,221 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2019-11-25 08:53:55,221 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2019-11-25 08:53:55,221 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2019-11-25 08:53:55,221 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2019-11-25 08:53:55,221 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2019-11-25 08:53:55,222 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2019-11-25 08:53:55,222 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2019-11-25 08:53:55,222 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2019-11-25 08:53:55,222 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2019-11-25 08:53:55,222 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2019-11-25 08:53:55,223 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2019-11-25 08:53:55,223 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2019-11-25 08:53:55,223 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2019-11-25 08:53:55,223 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2019-11-25 08:53:55,223 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2019-11-25 08:53:55,223 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2019-11-25 08:53:55,224 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2019-11-25 08:53:55,224 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-25 08:53:55,224 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2019-11-25 08:53:55,224 INFO L130 BoogieDeclarations]: Found specification of procedure cstrcmp [2019-11-25 08:53:55,224 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2019-11-25 08:53:55,225 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-25 08:53:55,225 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-25 08:53:55,225 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2019-11-25 08:53:55,225 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-25 08:53:55,225 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-25 08:53:55,226 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-25 08:53:55,226 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.setCurrentRoundingMode [2019-11-25 08:53:56,135 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-25 08:53:56,135 INFO L284 CfgBuilder]: Removed 3 assume(true) statements. [2019-11-25 08:53:56,136 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:53:56 BoogieIcfgContainer [2019-11-25 08:53:56,136 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-25 08:53:56,138 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-25 08:53:56,138 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-25 08:53:56,141 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-25 08:53:56,141 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 08:53:54" (1/3) ... [2019-11-25 08:53:56,142 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f0c00ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:53:56, skipping insertion in model container [2019-11-25 08:53:56,142 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:53:55" (2/3) ... [2019-11-25 08:53:56,143 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f0c00ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:53:56, skipping insertion in model container [2019-11-25 08:53:56,143 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:53:56" (3/3) ... [2019-11-25 08:53:56,145 INFO L109 eAbstractionObserver]: Analyzing ICFG openbsd_cstrcmp-alloca-1.i [2019-11-25 08:53:56,155 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-25 08:53:56,163 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 19 error locations. [2019-11-25 08:53:56,176 INFO L249 AbstractCegarLoop]: Starting to check reachability of 19 error locations. [2019-11-25 08:53:56,196 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-25 08:53:56,196 INFO L374 AbstractCegarLoop]: Hoare is false [2019-11-25 08:53:56,196 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-25 08:53:56,196 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-25 08:53:56,196 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-25 08:53:56,197 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-25 08:53:56,197 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-25 08:53:56,197 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-25 08:53:56,214 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states. [2019-11-25 08:53:56,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-25 08:53:56,224 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:53:56,225 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:53:56,225 INFO L410 AbstractCegarLoop]: === Iteration 1 === [cstrcmpErr3REQUIRES_VIOLATION, cstrcmpErr8REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr4REQUIRES_VIOLATION, cstrcmpErr9REQUIRES_VIOLATION, cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr5REQUIRES_VIOLATION, cstrcmpErr7REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr6REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK]=== [2019-11-25 08:53:56,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:53:56,232 INFO L82 PathProgramCache]: Analyzing trace with hash 96553872, now seen corresponding path program 1 times [2019-11-25 08:53:56,243 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-25 08:53:56,244 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1185495442] [2019-11-25 08:53:56,244 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2b40fcc5-5635-4b73-8562-7031f87dee36/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 [2019-11-25 08:53:56,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:56,470 INFO L255 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-25 08:53:56,475 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:53:56,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:53:56,534 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-25 08:53:56,581 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:53:56,582 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1185495442] [2019-11-25 08:53:56,582 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-25 08:53:56,583 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2019-11-25 08:53:56,583 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841195037] [2019-11-25 08:53:56,588 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-25 08:53:56,589 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-25 08:53:56,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-25 08:53:56,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-11-25 08:53:56,605 INFO L87 Difference]: Start difference. First operand 58 states. Second operand 6 states. [2019-11-25 08:53:56,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:53:56,732 INFO L93 Difference]: Finished difference Result 79 states and 87 transitions. [2019-11-25 08:53:56,736 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-25 08:53:56,738 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2019-11-25 08:53:56,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:53:56,755 INFO L225 Difference]: With dead ends: 79 [2019-11-25 08:53:56,755 INFO L226 Difference]: Without dead ends: 75 [2019-11-25 08:53:56,757 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-11-25 08:53:56,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2019-11-25 08:53:56,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 58. [2019-11-25 08:53:56,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-11-25 08:53:56,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 64 transitions. [2019-11-25 08:53:56,829 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 64 transitions. Word has length 11 [2019-11-25 08:53:56,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:53:56,830 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 64 transitions. [2019-11-25 08:53:56,830 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-25 08:53:56,830 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 64 transitions. [2019-11-25 08:53:56,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-25 08:53:56,831 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:53:56,831 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:53:57,034 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-25 08:53:57,034 INFO L410 AbstractCegarLoop]: === Iteration 2 === [cstrcmpErr3REQUIRES_VIOLATION, cstrcmpErr8REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr4REQUIRES_VIOLATION, cstrcmpErr9REQUIRES_VIOLATION, cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr5REQUIRES_VIOLATION, cstrcmpErr7REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr6REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK]=== [2019-11-25 08:53:57,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:53:57,034 INFO L82 PathProgramCache]: Analyzing trace with hash 98400914, now seen corresponding path program 1 times [2019-11-25 08:53:57,035 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-25 08:53:57,035 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1344912231] [2019-11-25 08:53:57,035 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2b40fcc5-5635-4b73-8562-7031f87dee36/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 [2019-11-25 08:53:57,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:57,220 INFO L255 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-25 08:53:57,221 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:53:57,297 INFO L343 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2019-11-25 08:53:57,298 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 [2019-11-25 08:53:57,299 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-25 08:53:57,309 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-25 08:53:57,311 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. [2019-11-25 08:53:57,311 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:18, output treesize:15 [2019-11-25 08:53:57,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:53:57,333 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-25 08:53:57,370 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:53:57,370 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1344912231] [2019-11-25 08:53:57,370 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-25 08:53:57,370 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2019-11-25 08:53:57,371 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67429726] [2019-11-25 08:53:57,372 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-25 08:53:57,372 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-25 08:53:57,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-25 08:53:57,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-25 08:53:57,373 INFO L87 Difference]: Start difference. First operand 58 states and 64 transitions. Second operand 4 states. [2019-11-25 08:53:57,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:53:57,561 INFO L93 Difference]: Finished difference Result 56 states and 62 transitions. [2019-11-25 08:53:57,562 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-25 08:53:57,562 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2019-11-25 08:53:57,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:53:57,564 INFO L225 Difference]: With dead ends: 56 [2019-11-25 08:53:57,564 INFO L226 Difference]: Without dead ends: 56 [2019-11-25 08:53:57,565 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-25 08:53:57,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-11-25 08:53:57,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2019-11-25 08:53:57,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2019-11-25 08:53:57,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 62 transitions. [2019-11-25 08:53:57,573 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 62 transitions. Word has length 11 [2019-11-25 08:53:57,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:53:57,573 INFO L462 AbstractCegarLoop]: Abstraction has 56 states and 62 transitions. [2019-11-25 08:53:57,574 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-25 08:53:57,574 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 62 transitions. [2019-11-25 08:53:57,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-25 08:53:57,575 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:53:57,575 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:53:57,778 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-25 08:53:57,778 INFO L410 AbstractCegarLoop]: === Iteration 3 === [cstrcmpErr3REQUIRES_VIOLATION, cstrcmpErr8REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr4REQUIRES_VIOLATION, cstrcmpErr9REQUIRES_VIOLATION, cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr5REQUIRES_VIOLATION, cstrcmpErr7REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr6REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK]=== [2019-11-25 08:53:57,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:53:57,779 INFO L82 PathProgramCache]: Analyzing trace with hash 98400915, now seen corresponding path program 1 times [2019-11-25 08:53:57,780 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-25 08:53:57,780 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [521658515] [2019-11-25 08:53:57,781 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2b40fcc5-5635-4b73-8562-7031f87dee36/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 [2019-11-25 08:53:57,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:57,995 INFO L255 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-25 08:53:57,996 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:53:58,015 INFO L392 ElimStorePlain]: Different costs {0=[|v_#length_26|], 1=[|v_#valid_42|]} [2019-11-25 08:53:58,023 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-25 08:53:58,025 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 [2019-11-25 08:53:58,025 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-25 08:53:58,053 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-25 08:53:58,064 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 [2019-11-25 08:53:58,065 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-25 08:53:58,099 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-25 08:53:58,100 INFO L496 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-25 08:53:58,100 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 5 variables, input treesize:28, output treesize:13 [2019-11-25 08:53:58,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:53:58,128 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-25 08:53:58,238 INFO L392 ElimStorePlain]: Different costs {1=[|#valid|], 2=[|#length|]} [2019-11-25 08:53:58,252 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 [2019-11-25 08:53:58,253 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-25 08:53:58,264 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-25 08:53:58,266 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-25 08:53:58,267 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-25 08:53:58,275 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-25 08:53:58,275 INFO L496 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-25 08:53:58,276 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 5 variables, input treesize:21, output treesize:3 [2019-11-25 08:53:58,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:53:58,284 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [521658515] [2019-11-25 08:53:58,284 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-25 08:53:58,284 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2019-11-25 08:53:58,284 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119893262] [2019-11-25 08:53:58,285 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-25 08:53:58,285 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-25 08:53:58,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-25 08:53:58,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-25 08:53:58,286 INFO L87 Difference]: Start difference. First operand 56 states and 62 transitions. Second operand 5 states. [2019-11-25 08:53:58,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:53:58,862 INFO L93 Difference]: Finished difference Result 76 states and 84 transitions. [2019-11-25 08:53:58,863 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-25 08:53:58,864 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2019-11-25 08:53:58,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:53:58,865 INFO L225 Difference]: With dead ends: 76 [2019-11-25 08:53:58,865 INFO L226 Difference]: Without dead ends: 76 [2019-11-25 08:53:58,866 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-11-25 08:53:58,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2019-11-25 08:53:58,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 58. [2019-11-25 08:53:58,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-11-25 08:53:58,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 65 transitions. [2019-11-25 08:53:58,873 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 65 transitions. Word has length 11 [2019-11-25 08:53:58,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:53:58,874 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 65 transitions. [2019-11-25 08:53:58,874 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-25 08:53:58,874 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 65 transitions. [2019-11-25 08:53:58,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-25 08:53:58,875 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:53:58,875 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:53:59,077 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-25 08:53:59,078 INFO L410 AbstractCegarLoop]: === Iteration 4 === [cstrcmpErr3REQUIRES_VIOLATION, cstrcmpErr8REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr4REQUIRES_VIOLATION, cstrcmpErr9REQUIRES_VIOLATION, cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr5REQUIRES_VIOLATION, cstrcmpErr7REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr6REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK]=== [2019-11-25 08:53:59,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:53:59,078 INFO L82 PathProgramCache]: Analyzing trace with hash -1701058104, now seen corresponding path program 1 times [2019-11-25 08:53:59,078 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-25 08:53:59,079 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1493897171] [2019-11-25 08:53:59,079 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2b40fcc5-5635-4b73-8562-7031f87dee36/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 [2019-11-25 08:53:59,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:59,281 INFO L255 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-25 08:53:59,283 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:53:59,300 INFO L392 ElimStorePlain]: Different costs {0=[|v_#length_28|], 1=[|v_#valid_47|]} [2019-11-25 08:53:59,307 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-25 08:53:59,308 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 [2019-11-25 08:53:59,309 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-25 08:53:59,374 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-25 08:53:59,384 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 [2019-11-25 08:53:59,384 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-25 08:53:59,404 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-25 08:53:59,405 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-25 08:53:59,405 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:26, output treesize:14 [2019-11-25 08:53:59,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:53:59,420 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-25 08:53:59,505 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-25 08:53:59,520 INFO L392 ElimStorePlain]: Different costs {1=[|#valid|], 2=[|#length|]} [2019-11-25 08:53:59,541 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-25 08:53:59,542 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-25 08:53:59,557 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-25 08:53:59,558 INFO L464 ElimStorePlain]: Eliminatee |#length| vanished before elimination [2019-11-25 08:53:59,558 INFO L496 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2019-11-25 08:53:59,558 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:32, output treesize:11 [2019-11-25 08:53:59,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:53:59,608 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1493897171] [2019-11-25 08:53:59,608 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-25 08:53:59,609 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2019-11-25 08:53:59,609 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123035083] [2019-11-25 08:53:59,609 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-25 08:53:59,609 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-25 08:53:59,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-25 08:53:59,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-11-25 08:53:59,610 INFO L87 Difference]: Start difference. First operand 58 states and 65 transitions. Second operand 6 states. [2019-11-25 08:54:00,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:54:00,071 INFO L93 Difference]: Finished difference Result 72 states and 80 transitions. [2019-11-25 08:54:00,072 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-25 08:54:00,072 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2019-11-25 08:54:00,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:54:00,073 INFO L225 Difference]: With dead ends: 72 [2019-11-25 08:54:00,073 INFO L226 Difference]: Without dead ends: 72 [2019-11-25 08:54:00,074 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-11-25 08:54:00,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2019-11-25 08:54:00,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 57. [2019-11-25 08:54:00,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-11-25 08:54:00,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 64 transitions. [2019-11-25 08:54:00,079 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 64 transitions. Word has length 13 [2019-11-25 08:54:00,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:54:00,079 INFO L462 AbstractCegarLoop]: Abstraction has 57 states and 64 transitions. [2019-11-25 08:54:00,079 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-25 08:54:00,079 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 64 transitions. [2019-11-25 08:54:00,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-25 08:54:00,081 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:54:00,081 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:54:00,282 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-25 08:54:00,282 INFO L410 AbstractCegarLoop]: === Iteration 5 === [cstrcmpErr3REQUIRES_VIOLATION, cstrcmpErr8REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr4REQUIRES_VIOLATION, cstrcmpErr9REQUIRES_VIOLATION, cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr5REQUIRES_VIOLATION, cstrcmpErr7REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr6REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK]=== [2019-11-25 08:54:00,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:54:00,282 INFO L82 PathProgramCache]: Analyzing trace with hash -1701058052, now seen corresponding path program 1 times [2019-11-25 08:54:00,283 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-25 08:54:00,283 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1743587245] [2019-11-25 08:54:00,283 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2b40fcc5-5635-4b73-8562-7031f87dee36/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 [2019-11-25 08:54:00,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:54:00,442 INFO L255 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-25 08:54:00,443 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:54:00,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:54:00,462 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-25 08:54:00,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:54:00,490 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1743587245] [2019-11-25 08:54:00,490 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-25 08:54:00,491 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2019-11-25 08:54:00,491 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158755452] [2019-11-25 08:54:00,491 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-25 08:54:00,491 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-25 08:54:00,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-25 08:54:00,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-11-25 08:54:00,492 INFO L87 Difference]: Start difference. First operand 57 states and 64 transitions. Second operand 6 states. [2019-11-25 08:54:00,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:54:00,591 INFO L93 Difference]: Finished difference Result 77 states and 86 transitions. [2019-11-25 08:54:00,592 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-25 08:54:00,592 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2019-11-25 08:54:00,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:54:00,593 INFO L225 Difference]: With dead ends: 77 [2019-11-25 08:54:00,593 INFO L226 Difference]: Without dead ends: 77 [2019-11-25 08:54:00,593 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-11-25 08:54:00,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2019-11-25 08:54:00,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 68. [2019-11-25 08:54:00,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2019-11-25 08:54:00,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 78 transitions. [2019-11-25 08:54:00,600 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 78 transitions. Word has length 13 [2019-11-25 08:54:00,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:54:00,601 INFO L462 AbstractCegarLoop]: Abstraction has 68 states and 78 transitions. [2019-11-25 08:54:00,601 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-25 08:54:00,601 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 78 transitions. [2019-11-25 08:54:00,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-25 08:54:00,602 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:54:00,602 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:54:00,804 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-25 08:54:00,804 INFO L410 AbstractCegarLoop]: === Iteration 6 === [cstrcmpErr3REQUIRES_VIOLATION, cstrcmpErr8REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr4REQUIRES_VIOLATION, cstrcmpErr9REQUIRES_VIOLATION, cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr5REQUIRES_VIOLATION, cstrcmpErr7REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr6REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK]=== [2019-11-25 08:54:00,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:54:00,805 INFO L82 PathProgramCache]: Analyzing trace with hash -1643799750, now seen corresponding path program 1 times [2019-11-25 08:54:00,805 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-25 08:54:00,805 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1255286506] [2019-11-25 08:54:00,805 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2b40fcc5-5635-4b73-8562-7031f87dee36/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 [2019-11-25 08:54:00,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:54:00,966 INFO L255 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-25 08:54:00,967 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:54:00,988 INFO L343 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2019-11-25 08:54:00,988 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 [2019-11-25 08:54:00,989 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-25 08:54:00,993 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-25 08:54:00,994 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. [2019-11-25 08:54:00,994 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:9, output treesize:11 [2019-11-25 08:54:01,014 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:54:01,015 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-25 08:54:01,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:54:01,026 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1255286506] [2019-11-25 08:54:01,026 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-25 08:54:01,026 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2019-11-25 08:54:01,026 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362233297] [2019-11-25 08:54:01,027 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-25 08:54:01,027 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-25 08:54:01,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-25 08:54:01,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-25 08:54:01,027 INFO L87 Difference]: Start difference. First operand 68 states and 78 transitions. Second operand 3 states. [2019-11-25 08:54:01,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:54:01,105 INFO L93 Difference]: Finished difference Result 66 states and 76 transitions. [2019-11-25 08:54:01,106 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-25 08:54:01,106 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2019-11-25 08:54:01,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:54:01,107 INFO L225 Difference]: With dead ends: 66 [2019-11-25 08:54:01,107 INFO L226 Difference]: Without dead ends: 66 [2019-11-25 08:54:01,107 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-25 08:54:01,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2019-11-25 08:54:01,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2019-11-25 08:54:01,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-11-25 08:54:01,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 76 transitions. [2019-11-25 08:54:01,113 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 76 transitions. Word has length 13 [2019-11-25 08:54:01,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:54:01,113 INFO L462 AbstractCegarLoop]: Abstraction has 66 states and 76 transitions. [2019-11-25 08:54:01,113 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-25 08:54:01,114 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 76 transitions. [2019-11-25 08:54:01,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-25 08:54:01,114 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:54:01,114 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:54:01,315 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-25 08:54:01,315 INFO L410 AbstractCegarLoop]: === Iteration 7 === [cstrcmpErr3REQUIRES_VIOLATION, cstrcmpErr8REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr4REQUIRES_VIOLATION, cstrcmpErr9REQUIRES_VIOLATION, cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr5REQUIRES_VIOLATION, cstrcmpErr7REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr6REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK]=== [2019-11-25 08:54:01,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:54:01,316 INFO L82 PathProgramCache]: Analyzing trace with hash -1643799749, now seen corresponding path program 1 times [2019-11-25 08:54:01,316 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-25 08:54:01,316 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1421923957] [2019-11-25 08:54:01,316 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2b40fcc5-5635-4b73-8562-7031f87dee36/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 [2019-11-25 08:54:01,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:54:01,468 INFO L255 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-25 08:54:01,469 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:54:01,506 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-25 08:54:01,506 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 [2019-11-25 08:54:01,507 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-25 08:54:01,572 INFO L567 ElimStorePlain]: treesize reduction 10, result has 68.8 percent of original size [2019-11-25 08:54:01,573 INFO L496 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-25 08:54:01,574 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:17, output treesize:10 [2019-11-25 08:54:01,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:54:01,627 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-25 08:54:01,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:54:01,745 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1421923957] [2019-11-25 08:54:01,745 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-25 08:54:01,745 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2019-11-25 08:54:01,746 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537496219] [2019-11-25 08:54:01,746 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-25 08:54:01,746 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-25 08:54:01,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-25 08:54:01,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-25 08:54:01,746 INFO L87 Difference]: Start difference. First operand 66 states and 76 transitions. Second operand 7 states. [2019-11-25 08:54:02,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:54:02,289 INFO L93 Difference]: Finished difference Result 77 states and 88 transitions. [2019-11-25 08:54:02,290 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-25 08:54:02,290 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 13 [2019-11-25 08:54:02,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:54:02,291 INFO L225 Difference]: With dead ends: 77 [2019-11-25 08:54:02,291 INFO L226 Difference]: Without dead ends: 77 [2019-11-25 08:54:02,291 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2019-11-25 08:54:02,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2019-11-25 08:54:02,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 68. [2019-11-25 08:54:02,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2019-11-25 08:54:02,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 79 transitions. [2019-11-25 08:54:02,297 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 79 transitions. Word has length 13 [2019-11-25 08:54:02,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:54:02,298 INFO L462 AbstractCegarLoop]: Abstraction has 68 states and 79 transitions. [2019-11-25 08:54:02,298 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-25 08:54:02,298 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 79 transitions. [2019-11-25 08:54:02,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-25 08:54:02,299 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:54:02,299 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:54:02,502 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-25 08:54:02,503 INFO L410 AbstractCegarLoop]: === Iteration 8 === [cstrcmpErr3REQUIRES_VIOLATION, cstrcmpErr8REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr4REQUIRES_VIOLATION, cstrcmpErr9REQUIRES_VIOLATION, cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr5REQUIRES_VIOLATION, cstrcmpErr7REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr6REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK]=== [2019-11-25 08:54:02,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:54:02,503 INFO L82 PathProgramCache]: Analyzing trace with hash -1193193614, now seen corresponding path program 1 times [2019-11-25 08:54:02,503 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-25 08:54:02,503 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [825585830] [2019-11-25 08:54:02,503 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2b40fcc5-5635-4b73-8562-7031f87dee36/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 [2019-11-25 08:54:02,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:54:02,667 INFO L255 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-25 08:54:02,668 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:54:02,701 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-25 08:54:02,702 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 [2019-11-25 08:54:02,702 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-25 08:54:02,729 INFO L567 ElimStorePlain]: treesize reduction 10, result has 69.7 percent of original size [2019-11-25 08:54:02,730 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-25 08:54:02,730 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:18, output treesize:14 [2019-11-25 08:54:02,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:54:02,742 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-25 08:54:02,823 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:54:02,823 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [825585830] [2019-11-25 08:54:02,824 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-25 08:54:02,824 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2019-11-25 08:54:02,824 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205191782] [2019-11-25 08:54:02,824 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-25 08:54:02,824 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-25 08:54:02,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-25 08:54:02,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-11-25 08:54:02,825 INFO L87 Difference]: Start difference. First operand 68 states and 79 transitions. Second operand 6 states. [2019-11-25 08:54:03,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:54:03,128 INFO L93 Difference]: Finished difference Result 74 states and 84 transitions. [2019-11-25 08:54:03,129 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-25 08:54:03,129 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2019-11-25 08:54:03,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:54:03,130 INFO L225 Difference]: With dead ends: 74 [2019-11-25 08:54:03,130 INFO L226 Difference]: Without dead ends: 74 [2019-11-25 08:54:03,131 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-11-25 08:54:03,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2019-11-25 08:54:03,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 67. [2019-11-25 08:54:03,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2019-11-25 08:54:03,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 78 transitions. [2019-11-25 08:54:03,135 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 78 transitions. Word has length 14 [2019-11-25 08:54:03,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:54:03,135 INFO L462 AbstractCegarLoop]: Abstraction has 67 states and 78 transitions. [2019-11-25 08:54:03,135 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-25 08:54:03,136 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 78 transitions. [2019-11-25 08:54:03,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-25 08:54:03,136 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:54:03,136 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:54:03,339 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-25 08:54:03,339 INFO L410 AbstractCegarLoop]: === Iteration 9 === [cstrcmpErr3REQUIRES_VIOLATION, cstrcmpErr8REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr4REQUIRES_VIOLATION, cstrcmpErr9REQUIRES_VIOLATION, cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr5REQUIRES_VIOLATION, cstrcmpErr7REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr6REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK]=== [2019-11-25 08:54:03,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:54:03,339 INFO L82 PathProgramCache]: Analyzing trace with hash -1900638250, now seen corresponding path program 1 times [2019-11-25 08:54:03,340 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-25 08:54:03,340 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [19518347] [2019-11-25 08:54:03,340 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2b40fcc5-5635-4b73-8562-7031f87dee36/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 [2019-11-25 08:54:03,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:54:03,484 INFO L255 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-25 08:54:03,486 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:54:03,497 INFO L392 ElimStorePlain]: Different costs {0=[|v_#length_36|], 1=[|v_#valid_69|]} [2019-11-25 08:54:03,509 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-25 08:54:03,510 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 [2019-11-25 08:54:03,510 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-25 08:54:03,531 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-25 08:54:03,538 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 [2019-11-25 08:54:03,539 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-25 08:54:03,556 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-25 08:54:03,556 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-25 08:54:03,557 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:28, output treesize:16 [2019-11-25 08:54:03,651 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:54:03,651 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-25 08:54:04,094 INFO L392 ElimStorePlain]: Different costs {1=[|#valid|], 2=[|#length|]} [2019-11-25 08:54:04,104 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-25 08:54:04,104 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-25 08:54:04,105 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-25 08:54:04,105 INFO L464 ElimStorePlain]: Eliminatee |#length| vanished before elimination [2019-11-25 08:54:04,105 INFO L496 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-25 08:54:04,106 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:39, output treesize:1 [2019-11-25 08:54:04,110 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:54:04,110 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [19518347] [2019-11-25 08:54:04,110 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:54:04,110 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2019-11-25 08:54:04,111 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929930621] [2019-11-25 08:54:04,111 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-25 08:54:04,111 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-25 08:54:04,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-25 08:54:04,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2019-11-25 08:54:04,112 INFO L87 Difference]: Start difference. First operand 67 states and 78 transitions. Second operand 10 states. [2019-11-25 08:54:05,053 WARN L192 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2019-11-25 08:54:05,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:54:05,735 INFO L93 Difference]: Finished difference Result 131 states and 152 transitions. [2019-11-25 08:54:05,737 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-25 08:54:05,737 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 15 [2019-11-25 08:54:05,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:54:05,738 INFO L225 Difference]: With dead ends: 131 [2019-11-25 08:54:05,738 INFO L226 Difference]: Without dead ends: 131 [2019-11-25 08:54:05,738 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2019-11-25 08:54:05,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2019-11-25 08:54:05,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 83. [2019-11-25 08:54:05,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-11-25 08:54:05,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 98 transitions. [2019-11-25 08:54:05,756 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 98 transitions. Word has length 15 [2019-11-25 08:54:05,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:54:05,757 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 98 transitions. [2019-11-25 08:54:05,757 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-25 08:54:05,757 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 98 transitions. [2019-11-25 08:54:05,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-25 08:54:05,758 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:54:05,758 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:54:05,958 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-25 08:54:05,958 INFO L410 AbstractCegarLoop]: === Iteration 10 === [cstrcmpErr3REQUIRES_VIOLATION, cstrcmpErr8REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr4REQUIRES_VIOLATION, cstrcmpErr9REQUIRES_VIOLATION, cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr5REQUIRES_VIOLATION, cstrcmpErr7REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr6REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK]=== [2019-11-25 08:54:05,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:54:05,959 INFO L82 PathProgramCache]: Analyzing trace with hash -1281544870, now seen corresponding path program 1 times [2019-11-25 08:54:05,959 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-25 08:54:05,959 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1587262780] [2019-11-25 08:54:05,959 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2b40fcc5-5635-4b73-8562-7031f87dee36/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 [2019-11-25 08:54:06,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:54:06,102 INFO L255 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-25 08:54:06,103 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:54:06,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:54:06,121 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-25 08:54:06,129 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 [2019-11-25 08:54:06,129 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-25 08:54:06,130 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-25 08:54:06,130 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-25 08:54:06,130 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:14, output treesize:1 [2019-11-25 08:54:06,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:54:06,136 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1587262780] [2019-11-25 08:54:06,136 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-25 08:54:06,136 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2019-11-25 08:54:06,136 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669401317] [2019-11-25 08:54:06,136 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-25 08:54:06,136 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-25 08:54:06,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-25 08:54:06,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-25 08:54:06,137 INFO L87 Difference]: Start difference. First operand 83 states and 98 transitions. Second operand 5 states. [2019-11-25 08:54:06,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:54:06,236 INFO L93 Difference]: Finished difference Result 81 states and 96 transitions. [2019-11-25 08:54:06,236 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-25 08:54:06,236 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2019-11-25 08:54:06,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:54:06,237 INFO L225 Difference]: With dead ends: 81 [2019-11-25 08:54:06,238 INFO L226 Difference]: Without dead ends: 81 [2019-11-25 08:54:06,238 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-25 08:54:06,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2019-11-25 08:54:06,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2019-11-25 08:54:06,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2019-11-25 08:54:06,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 96 transitions. [2019-11-25 08:54:06,242 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 96 transitions. Word has length 17 [2019-11-25 08:54:06,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:54:06,242 INFO L462 AbstractCegarLoop]: Abstraction has 81 states and 96 transitions. [2019-11-25 08:54:06,242 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-25 08:54:06,243 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 96 transitions. [2019-11-25 08:54:06,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-25 08:54:06,243 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:54:06,243 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:54:06,444 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-25 08:54:06,444 INFO L410 AbstractCegarLoop]: === Iteration 11 === [cstrcmpErr3REQUIRES_VIOLATION, cstrcmpErr8REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr4REQUIRES_VIOLATION, cstrcmpErr9REQUIRES_VIOLATION, cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr5REQUIRES_VIOLATION, cstrcmpErr7REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr6REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK]=== [2019-11-25 08:54:06,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:54:06,444 INFO L82 PathProgramCache]: Analyzing trace with hash -1281544869, now seen corresponding path program 1 times [2019-11-25 08:54:06,445 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-25 08:54:06,445 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1188400317] [2019-11-25 08:54:06,445 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2b40fcc5-5635-4b73-8562-7031f87dee36/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 [2019-11-25 08:54:06,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:54:06,606 INFO L255 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-25 08:54:06,607 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:54:06,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:54:06,667 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-25 08:54:06,869 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-25 08:54:06,886 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 12 treesize of output 10 [2019-11-25 08:54:06,887 INFO L496 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-25 08:54:06,908 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 12 [2019-11-25 08:54:06,908 INFO L496 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-25 08:54:06,916 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 16 treesize of output 12 [2019-11-25 08:54:06,916 INFO L496 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-25 08:54:06,956 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-25 08:54:06,956 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 3 xjuncts. [2019-11-25 08:54:06,956 INFO L221 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:43, output treesize:35 [2019-11-25 08:54:07,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:54:07,124 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1188400317] [2019-11-25 08:54:07,125 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-25 08:54:07,125 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 11 [2019-11-25 08:54:07,125 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471647457] [2019-11-25 08:54:07,125 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-25 08:54:07,125 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-25 08:54:07,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-25 08:54:07,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2019-11-25 08:54:07,126 INFO L87 Difference]: Start difference. First operand 81 states and 96 transitions. Second operand 12 states. [2019-11-25 08:54:07,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:54:07,756 INFO L93 Difference]: Finished difference Result 112 states and 132 transitions. [2019-11-25 08:54:07,761 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-25 08:54:07,761 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 17 [2019-11-25 08:54:07,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:54:07,764 INFO L225 Difference]: With dead ends: 112 [2019-11-25 08:54:07,764 INFO L226 Difference]: Without dead ends: 112 [2019-11-25 08:54:07,764 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2019-11-25 08:54:07,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2019-11-25 08:54:07,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 81. [2019-11-25 08:54:07,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2019-11-25 08:54:07,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 96 transitions. [2019-11-25 08:54:07,768 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 96 transitions. Word has length 17 [2019-11-25 08:54:07,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:54:07,769 INFO L462 AbstractCegarLoop]: Abstraction has 81 states and 96 transitions. [2019-11-25 08:54:07,769 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-25 08:54:07,769 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 96 transitions. [2019-11-25 08:54:07,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-25 08:54:07,771 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:54:07,771 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:54:07,972 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-25 08:54:07,972 INFO L410 AbstractCegarLoop]: === Iteration 12 === [cstrcmpErr3REQUIRES_VIOLATION, cstrcmpErr8REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr4REQUIRES_VIOLATION, cstrcmpErr9REQUIRES_VIOLATION, cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr5REQUIRES_VIOLATION, cstrcmpErr7REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr6REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK]=== [2019-11-25 08:54:07,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:54:07,972 INFO L82 PathProgramCache]: Analyzing trace with hash -1625911042, now seen corresponding path program 1 times [2019-11-25 08:54:07,972 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-25 08:54:07,972 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1779637714] [2019-11-25 08:54:07,973 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2b40fcc5-5635-4b73-8562-7031f87dee36/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 [2019-11-25 08:54:08,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:54:08,126 INFO L255 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-25 08:54:08,127 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:54:08,160 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-25 08:54:08,161 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 [2019-11-25 08:54:08,161 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-25 08:54:08,202 INFO L567 ElimStorePlain]: treesize reduction 10, result has 68.8 percent of original size [2019-11-25 08:54:08,203 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-25 08:54:08,203 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:17, output treesize:13 [2019-11-25 08:54:08,330 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:54:08,330 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-25 08:54:08,901 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:54:08,901 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1779637714] [2019-11-25 08:54:08,901 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:54:08,901 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2019-11-25 08:54:08,901 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115882897] [2019-11-25 08:54:08,902 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-25 08:54:08,902 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-25 08:54:08,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-25 08:54:08,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2019-11-25 08:54:08,903 INFO L87 Difference]: Start difference. First operand 81 states and 96 transitions. Second operand 12 states. [2019-11-25 08:54:09,733 WARN L192 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 16 [2019-11-25 08:54:09,942 WARN L192 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 19 [2019-11-25 08:54:10,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:54:10,297 INFO L93 Difference]: Finished difference Result 98 states and 114 transitions. [2019-11-25 08:54:10,298 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-25 08:54:10,298 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 17 [2019-11-25 08:54:10,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:54:10,299 INFO L225 Difference]: With dead ends: 98 [2019-11-25 08:54:10,299 INFO L226 Difference]: Without dead ends: 98 [2019-11-25 08:54:10,299 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=102, Invalid=204, Unknown=0, NotChecked=0, Total=306 [2019-11-25 08:54:10,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2019-11-25 08:54:10,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 78. [2019-11-25 08:54:10,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2019-11-25 08:54:10,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 92 transitions. [2019-11-25 08:54:10,303 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 92 transitions. Word has length 17 [2019-11-25 08:54:10,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:54:10,304 INFO L462 AbstractCegarLoop]: Abstraction has 78 states and 92 transitions. [2019-11-25 08:54:10,304 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-25 08:54:10,304 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 92 transitions. [2019-11-25 08:54:10,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-25 08:54:10,305 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:54:10,305 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:54:10,505 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-25 08:54:10,506 INFO L410 AbstractCegarLoop]: === Iteration 13 === [cstrcmpErr3REQUIRES_VIOLATION, cstrcmpErr8REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr4REQUIRES_VIOLATION, cstrcmpErr9REQUIRES_VIOLATION, cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr5REQUIRES_VIOLATION, cstrcmpErr7REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr6REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK]=== [2019-11-25 08:54:10,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:54:10,506 INFO L82 PathProgramCache]: Analyzing trace with hash 1090994011, now seen corresponding path program 1 times [2019-11-25 08:54:10,506 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-25 08:54:10,506 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1567364296] [2019-11-25 08:54:10,507 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2b40fcc5-5635-4b73-8562-7031f87dee36/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 [2019-11-25 08:54:10,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:54:10,691 INFO L255 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-25 08:54:10,693 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:54:10,711 INFO L343 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2019-11-25 08:54:10,711 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 [2019-11-25 08:54:10,711 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-25 08:54:10,742 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-25 08:54:10,742 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. [2019-11-25 08:54:10,743 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:9, output treesize:11 [2019-11-25 08:54:10,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:54:10,774 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-25 08:54:10,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:54:10,817 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1567364296] [2019-11-25 08:54:10,817 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-25 08:54:10,817 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 6] imperfect sequences [] total 6 [2019-11-25 08:54:10,817 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669324051] [2019-11-25 08:54:10,817 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-25 08:54:10,817 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-25 08:54:10,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-25 08:54:10,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2019-11-25 08:54:10,818 INFO L87 Difference]: Start difference. First operand 78 states and 92 transitions. Second operand 7 states. [2019-11-25 08:54:10,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:54:10,981 INFO L93 Difference]: Finished difference Result 77 states and 91 transitions. [2019-11-25 08:54:10,981 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-25 08:54:10,981 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2019-11-25 08:54:10,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:54:10,982 INFO L225 Difference]: With dead ends: 77 [2019-11-25 08:54:10,982 INFO L226 Difference]: Without dead ends: 77 [2019-11-25 08:54:10,983 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-11-25 08:54:10,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2019-11-25 08:54:10,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2019-11-25 08:54:10,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2019-11-25 08:54:10,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 91 transitions. [2019-11-25 08:54:10,986 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 91 transitions. Word has length 19 [2019-11-25 08:54:10,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:54:10,986 INFO L462 AbstractCegarLoop]: Abstraction has 77 states and 91 transitions. [2019-11-25 08:54:10,986 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-25 08:54:10,986 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 91 transitions. [2019-11-25 08:54:10,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-25 08:54:10,987 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:54:10,987 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:54:11,190 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-25 08:54:11,190 INFO L410 AbstractCegarLoop]: === Iteration 14 === [cstrcmpErr3REQUIRES_VIOLATION, cstrcmpErr8REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr4REQUIRES_VIOLATION, cstrcmpErr9REQUIRES_VIOLATION, cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr5REQUIRES_VIOLATION, cstrcmpErr7REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr6REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK]=== [2019-11-25 08:54:11,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:54:11,190 INFO L82 PathProgramCache]: Analyzing trace with hash 1090994012, now seen corresponding path program 1 times [2019-11-25 08:54:11,191 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-25 08:54:11,191 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [448953267] [2019-11-25 08:54:11,191 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2b40fcc5-5635-4b73-8562-7031f87dee36/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 [2019-11-25 08:54:11,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:54:11,354 INFO L255 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-25 08:54:11,357 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:54:11,378 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-25 08:54:11,378 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 [2019-11-25 08:54:11,378 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-25 08:54:11,400 INFO L567 ElimStorePlain]: treesize reduction 10, result has 64.3 percent of original size [2019-11-25 08:54:11,400 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-25 08:54:11,400 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:13, output treesize:9 [2019-11-25 08:54:11,446 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:54:11,446 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-25 08:54:11,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:54:11,669 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [448953267] [2019-11-25 08:54:11,669 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-25 08:54:11,669 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 11 [2019-11-25 08:54:11,669 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506837856] [2019-11-25 08:54:11,670 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-25 08:54:11,670 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-25 08:54:11,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-25 08:54:11,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2019-11-25 08:54:11,670 INFO L87 Difference]: Start difference. First operand 77 states and 91 transitions. Second operand 12 states. [2019-11-25 08:54:12,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:54:12,539 INFO L93 Difference]: Finished difference Result 109 states and 124 transitions. [2019-11-25 08:54:12,540 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-25 08:54:12,540 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 19 [2019-11-25 08:54:12,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:54:12,542 INFO L225 Difference]: With dead ends: 109 [2019-11-25 08:54:12,542 INFO L226 Difference]: Without dead ends: 109 [2019-11-25 08:54:12,542 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2019-11-25 08:54:12,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2019-11-25 08:54:12,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 79. [2019-11-25 08:54:12,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2019-11-25 08:54:12,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 93 transitions. [2019-11-25 08:54:12,545 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 93 transitions. Word has length 19 [2019-11-25 08:54:12,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:54:12,545 INFO L462 AbstractCegarLoop]: Abstraction has 79 states and 93 transitions. [2019-11-25 08:54:12,546 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-25 08:54:12,546 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 93 transitions. [2019-11-25 08:54:12,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-25 08:54:12,546 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:54:12,547 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] [2019-11-25 08:54:12,747 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-25 08:54:12,747 INFO L410 AbstractCegarLoop]: === Iteration 15 === [cstrcmpErr3REQUIRES_VIOLATION, cstrcmpErr8REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr4REQUIRES_VIOLATION, cstrcmpErr9REQUIRES_VIOLATION, cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr5REQUIRES_VIOLATION, cstrcmpErr7REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr6REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK]=== [2019-11-25 08:54:12,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:54:12,747 INFO L82 PathProgramCache]: Analyzing trace with hash 473224732, now seen corresponding path program 1 times [2019-11-25 08:54:12,748 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-25 08:54:12,748 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [606804741] [2019-11-25 08:54:12,748 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2b40fcc5-5635-4b73-8562-7031f87dee36/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 [2019-11-25 08:54:12,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:54:12,919 INFO L255 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-25 08:54:12,920 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:54:12,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:54:12,947 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-25 08:54:12,962 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 [2019-11-25 08:54:12,962 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-25 08:54:12,965 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-25 08:54:12,965 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-25 08:54:12,965 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:14, output treesize:1 [2019-11-25 08:54:12,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:54:12,976 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [606804741] [2019-11-25 08:54:12,976 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-25 08:54:12,976 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2019-11-25 08:54:12,976 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562248140] [2019-11-25 08:54:12,976 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-25 08:54:12,977 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-25 08:54:12,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-25 08:54:12,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-11-25 08:54:12,977 INFO L87 Difference]: Start difference. First operand 79 states and 93 transitions. Second operand 6 states. [2019-11-25 08:54:13,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:54:13,135 INFO L93 Difference]: Finished difference Result 78 states and 92 transitions. [2019-11-25 08:54:13,136 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-25 08:54:13,136 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2019-11-25 08:54:13,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:54:13,137 INFO L225 Difference]: With dead ends: 78 [2019-11-25 08:54:13,137 INFO L226 Difference]: Without dead ends: 78 [2019-11-25 08:54:13,137 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-11-25 08:54:13,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2019-11-25 08:54:13,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2019-11-25 08:54:13,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2019-11-25 08:54:13,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 92 transitions. [2019-11-25 08:54:13,140 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 92 transitions. Word has length 21 [2019-11-25 08:54:13,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:54:13,140 INFO L462 AbstractCegarLoop]: Abstraction has 78 states and 92 transitions. [2019-11-25 08:54:13,140 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-25 08:54:13,140 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 92 transitions. [2019-11-25 08:54:13,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-25 08:54:13,141 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:54:13,141 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] [2019-11-25 08:54:13,341 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-25 08:54:13,341 INFO L410 AbstractCegarLoop]: === Iteration 16 === [cstrcmpErr3REQUIRES_VIOLATION, cstrcmpErr8REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr4REQUIRES_VIOLATION, cstrcmpErr9REQUIRES_VIOLATION, cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr5REQUIRES_VIOLATION, cstrcmpErr7REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr6REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK]=== [2019-11-25 08:54:13,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:54:13,342 INFO L82 PathProgramCache]: Analyzing trace with hash 473224733, now seen corresponding path program 1 times [2019-11-25 08:54:13,342 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-25 08:54:13,342 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [862268212] [2019-11-25 08:54:13,342 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2b40fcc5-5635-4b73-8562-7031f87dee36/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 [2019-11-25 08:54:13,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:54:13,509 INFO L255 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-25 08:54:13,510 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:54:13,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:54:13,564 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-25 08:54:13,652 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-25 08:54:13,662 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 12 treesize of output 10 [2019-11-25 08:54:13,663 INFO L496 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-25 08:54:13,672 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 12 [2019-11-25 08:54:13,673 INFO L496 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-25 08:54:13,712 INFO L567 ElimStorePlain]: treesize reduction 7, result has 69.6 percent of original size [2019-11-25 08:54:13,712 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2019-11-25 08:54:13,713 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:27, output treesize:16 [2019-11-25 08:54:13,887 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:54:13,888 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [862268212] [2019-11-25 08:54:13,888 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-25 08:54:13,888 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 11 [2019-11-25 08:54:13,888 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068472828] [2019-11-25 08:54:13,888 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-25 08:54:13,888 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-25 08:54:13,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-25 08:54:13,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2019-11-25 08:54:13,889 INFO L87 Difference]: Start difference. First operand 78 states and 92 transitions. Second operand 12 states. [2019-11-25 08:54:14,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:54:14,283 INFO L93 Difference]: Finished difference Result 94 states and 110 transitions. [2019-11-25 08:54:14,283 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-25 08:54:14,283 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2019-11-25 08:54:14,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:54:14,284 INFO L225 Difference]: With dead ends: 94 [2019-11-25 08:54:14,284 INFO L226 Difference]: Without dead ends: 94 [2019-11-25 08:54:14,285 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2019-11-25 08:54:14,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2019-11-25 08:54:14,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 77. [2019-11-25 08:54:14,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2019-11-25 08:54:14,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 91 transitions. [2019-11-25 08:54:14,288 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 91 transitions. Word has length 21 [2019-11-25 08:54:14,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:54:14,288 INFO L462 AbstractCegarLoop]: Abstraction has 77 states and 91 transitions. [2019-11-25 08:54:14,288 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-25 08:54:14,288 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 91 transitions. [2019-11-25 08:54:14,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-25 08:54:14,289 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:54:14,289 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] [2019-11-25 08:54:14,492 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-25 08:54:14,492 INFO L410 AbstractCegarLoop]: === Iteration 17 === [cstrcmpErr3REQUIRES_VIOLATION, cstrcmpErr8REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr4REQUIRES_VIOLATION, cstrcmpErr9REQUIRES_VIOLATION, cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr5REQUIRES_VIOLATION, cstrcmpErr7REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr6REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK]=== [2019-11-25 08:54:14,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:54:14,493 INFO L82 PathProgramCache]: Analyzing trace with hash -497615063, now seen corresponding path program 1 times [2019-11-25 08:54:14,493 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-25 08:54:14,493 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [706431803] [2019-11-25 08:54:14,493 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2b40fcc5-5635-4b73-8562-7031f87dee36/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 [2019-11-25 08:54:14,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:54:14,663 INFO L255 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-25 08:54:14,673 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:54:14,688 INFO L343 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2019-11-25 08:54:14,689 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 [2019-11-25 08:54:14,689 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-25 08:54:14,694 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-25 08:54:14,694 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. [2019-11-25 08:54:14,694 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:9, output treesize:11 [2019-11-25 08:54:14,732 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:54:14,732 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-25 08:54:14,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:54:14,775 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [706431803] [2019-11-25 08:54:14,775 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-25 08:54:14,775 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 6] imperfect sequences [] total 6 [2019-11-25 08:54:14,775 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763771756] [2019-11-25 08:54:14,775 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-25 08:54:14,775 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-25 08:54:14,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-25 08:54:14,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2019-11-25 08:54:14,776 INFO L87 Difference]: Start difference. First operand 77 states and 91 transitions. Second operand 7 states. [2019-11-25 08:54:14,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:54:14,928 INFO L93 Difference]: Finished difference Result 76 states and 90 transitions. [2019-11-25 08:54:14,928 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-25 08:54:14,929 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 23 [2019-11-25 08:54:14,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:54:14,929 INFO L225 Difference]: With dead ends: 76 [2019-11-25 08:54:14,929 INFO L226 Difference]: Without dead ends: 76 [2019-11-25 08:54:14,930 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 36 SyntacticMatches, 4 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-11-25 08:54:14,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2019-11-25 08:54:14,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2019-11-25 08:54:14,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2019-11-25 08:54:14,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 90 transitions. [2019-11-25 08:54:14,932 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 90 transitions. Word has length 23 [2019-11-25 08:54:14,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:54:14,932 INFO L462 AbstractCegarLoop]: Abstraction has 76 states and 90 transitions. [2019-11-25 08:54:14,933 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-25 08:54:14,933 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 90 transitions. [2019-11-25 08:54:14,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-25 08:54:14,933 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:54:14,933 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] [2019-11-25 08:54:15,134 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-25 08:54:15,134 INFO L410 AbstractCegarLoop]: === Iteration 18 === [cstrcmpErr3REQUIRES_VIOLATION, cstrcmpErr8REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr4REQUIRES_VIOLATION, cstrcmpErr9REQUIRES_VIOLATION, cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr5REQUIRES_VIOLATION, cstrcmpErr7REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr6REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK]=== [2019-11-25 08:54:15,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:54:15,134 INFO L82 PathProgramCache]: Analyzing trace with hash -497615062, now seen corresponding path program 1 times [2019-11-25 08:54:15,134 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-25 08:54:15,134 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1897052973] [2019-11-25 08:54:15,135 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2b40fcc5-5635-4b73-8562-7031f87dee36/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 [2019-11-25 08:54:15,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:54:15,322 INFO L255 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-25 08:54:15,323 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:54:15,344 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-25 08:54:15,344 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 [2019-11-25 08:54:15,345 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-25 08:54:15,372 INFO L567 ElimStorePlain]: treesize reduction 10, result has 64.3 percent of original size [2019-11-25 08:54:15,372 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-25 08:54:15,373 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:13, output treesize:9 [2019-11-25 08:54:15,435 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:54:15,436 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-25 08:54:15,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:54:15,763 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1897052973] [2019-11-25 08:54:15,764 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-25 08:54:15,764 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 13 [2019-11-25 08:54:15,764 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932141746] [2019-11-25 08:54:15,764 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-25 08:54:15,764 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-25 08:54:15,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-25 08:54:15,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2019-11-25 08:54:15,765 INFO L87 Difference]: Start difference. First operand 76 states and 90 transitions. Second operand 14 states. [2019-11-25 08:54:16,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:54:16,998 INFO L93 Difference]: Finished difference Result 130 states and 148 transitions. [2019-11-25 08:54:16,999 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-25 08:54:16,999 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 23 [2019-11-25 08:54:16,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:54:17,000 INFO L225 Difference]: With dead ends: 130 [2019-11-25 08:54:17,000 INFO L226 Difference]: Without dead ends: 130 [2019-11-25 08:54:17,000 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2019-11-25 08:54:17,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2019-11-25 08:54:17,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 80. [2019-11-25 08:54:17,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2019-11-25 08:54:17,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 95 transitions. [2019-11-25 08:54:17,004 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 95 transitions. Word has length 23 [2019-11-25 08:54:17,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:54:17,004 INFO L462 AbstractCegarLoop]: Abstraction has 80 states and 95 transitions. [2019-11-25 08:54:17,004 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-25 08:54:17,004 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 95 transitions. [2019-11-25 08:54:17,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-25 08:54:17,005 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:54:17,005 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] [2019-11-25 08:54:17,208 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-25 08:54:17,208 INFO L410 AbstractCegarLoop]: === Iteration 19 === [cstrcmpErr3REQUIRES_VIOLATION, cstrcmpErr8REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr4REQUIRES_VIOLATION, cstrcmpErr9REQUIRES_VIOLATION, cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr5REQUIRES_VIOLATION, cstrcmpErr7REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr6REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK]=== [2019-11-25 08:54:17,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:54:17,209 INFO L82 PathProgramCache]: Analyzing trace with hash -497565333, now seen corresponding path program 1 times [2019-11-25 08:54:17,209 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-25 08:54:17,209 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1088129108] [2019-11-25 08:54:17,209 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2b40fcc5-5635-4b73-8562-7031f87dee36/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 [2019-11-25 08:54:17,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:54:17,428 INFO L255 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 25 conjunts are in the unsatisfiable core [2019-11-25 08:54:17,429 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:54:17,457 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 [2019-11-25 08:54:17,457 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-25 08:54:17,465 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-25 08:54:17,465 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-25 08:54:17,465 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:15 [2019-11-25 08:54:17,624 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-25 08:54:17,625 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 32 treesize of output 24 [2019-11-25 08:54:17,625 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-25 08:54:17,626 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-25 08:54:17,626 INFO L496 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-25 08:54:17,636 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-25 08:54:17,636 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-25 08:54:17,637 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2019-11-25 08:54:17,637 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:32, output treesize:19 [2019-11-25 08:54:17,663 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:54:17,664 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-25 08:54:18,124 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-25 08:54:18,125 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) [2019-11-25 08:54:18,128 INFO L168 Benchmark]: Toolchain (without parser) took 23621.99 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 205.0 MB). Free memory was 939.3 MB in the beginning and 995.1 MB in the end (delta: -55.7 MB). Peak memory consumption was 149.3 MB. Max. memory is 11.5 GB. [2019-11-25 08:54:18,128 INFO L168 Benchmark]: CDTParser took 0.28 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. [2019-11-25 08:54:18,128 INFO L168 Benchmark]: CACSL2BoogieTranslator took 539.48 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 127.4 MB). Free memory was 939.3 MB in the beginning and 1.1 GB in the end (delta: -170.7 MB). Peak memory consumption was 18.0 MB. Max. memory is 11.5 GB. [2019-11-25 08:54:18,128 INFO L168 Benchmark]: Boogie Preprocessor took 82.37 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: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2019-11-25 08:54:18,129 INFO L168 Benchmark]: RCFGBuilder took 1007.07 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. [2019-11-25 08:54:18,129 INFO L168 Benchmark]: TraceAbstraction took 21989.13 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 77.6 MB). Free memory was 1.1 GB in the beginning and 995.1 MB in the end (delta: 55.0 MB). Peak memory consumption was 132.6 MB. Max. memory is 11.5 GB. [2019-11-25 08:54:18,131 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 1.0 GB. Free memory is still 962.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 539.48 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 127.4 MB). Free memory was 939.3 MB in the beginning and 1.1 GB in the end (delta: -170.7 MB). Peak memory consumption was 18.0 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 82.37 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: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. * RCFGBuilder took 1007.07 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 21989.13 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 77.6 MB). Free memory was 1.1 GB in the beginning and 995.1 MB in the end (delta: 55.0 MB). Peak memory consumption was 132.6 MB. 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...