./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/cstrcmp-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version f470102c Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_6ee30319-8eb7-4e19-9c50-0c0e1826f677/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_6ee30319-8eb7-4e19-9c50-0c0e1826f677/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_6ee30319-8eb7-4e19-9c50-0c0e1826f677/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_6ee30319-8eb7-4e19-9c50-0c0e1826f677/bin/uautomizer/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/cstrcmp-alloca-2.i -s /tmp/vcloud-vcloud-master/worker/run_dir_6ee30319-8eb7-4e19-9c50-0c0e1826f677/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_6ee30319-8eb7-4e19-9c50-0c0e1826f677/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 df3db790fa8159689a8da2e25598b93c123cddf7 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Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.25-f470102 [2019-12-07 13:22:08,154 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-07 13:22:08,155 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-07 13:22:08,162 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-07 13:22:08,163 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-07 13:22:08,163 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-07 13:22:08,164 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-07 13:22:08,166 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-07 13:22:08,167 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-07 13:22:08,168 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-07 13:22:08,168 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-07 13:22:08,169 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-07 13:22:08,169 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-07 13:22:08,170 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-07 13:22:08,171 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-07 13:22:08,172 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-07 13:22:08,172 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-07 13:22:08,173 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-07 13:22:08,174 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-07 13:22:08,176 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-07 13:22:08,177 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-07 13:22:08,178 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-07 13:22:08,179 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-07 13:22:08,179 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-07 13:22:08,181 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-12-07 13:22:08,181 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-12-07 13:22:08,181 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-12-07 13:22:08,182 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-12-07 13:22:08,182 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-12-07 13:22:08,182 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-12-07 13:22:08,183 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-07 13:22:08,183 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-07 13:22:08,183 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-07 13:22:08,184 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-07 13:22:08,184 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-07 13:22:08,185 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-07 13:22:08,185 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-07 13:22:08,185 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-07 13:22:08,185 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-07 13:22:08,186 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-07 13:22:08,186 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-07 13:22:08,187 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_6ee30319-8eb7-4e19-9c50-0c0e1826f677/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2019-12-07 13:22:08,197 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-07 13:22:08,197 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-07 13:22:08,197 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-12-07 13:22:08,198 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-12-07 13:22:08,198 INFO L138 SettingsManager]: * Use SBE=true [2019-12-07 13:22:08,198 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-07 13:22:08,198 INFO L138 SettingsManager]: * sizeof long=4 [2019-12-07 13:22:08,198 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-12-07 13:22:08,198 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-12-07 13:22:08,198 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-12-07 13:22:08,198 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-07 13:22:08,199 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2019-12-07 13:22:08,199 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2019-12-07 13:22:08,199 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2019-12-07 13:22:08,199 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-12-07 13:22:08,199 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-12-07 13:22:08,199 INFO L138 SettingsManager]: * sizeof long double=12 [2019-12-07 13:22:08,199 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-07 13:22:08,200 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-07 13:22:08,200 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-12-07 13:22:08,200 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-12-07 13:22:08,200 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-12-07 13:22:08,200 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-07 13:22:08,200 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-07 13:22:08,200 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-12-07 13:22:08,200 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-12-07 13:22:08,200 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-12-07 13:22:08,200 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-12-07 13:22:08,201 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_6ee30319-8eb7-4e19-9c50-0c0e1826f677/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 -> df3db790fa8159689a8da2e25598b93c123cddf7 [2019-12-07 13:22:08,302 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-07 13:22:08,312 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-07 13:22:08,315 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-07 13:22:08,316 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-07 13:22:08,316 INFO L275 PluginConnector]: CDTParser initialized [2019-12-07 13:22:08,317 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_6ee30319-8eb7-4e19-9c50-0c0e1826f677/bin/uautomizer/../../sv-benchmarks/c/array-memsafety/cstrcmp-alloca-2.i [2019-12-07 13:22:08,359 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_6ee30319-8eb7-4e19-9c50-0c0e1826f677/bin/uautomizer/data/734be4d3d/0f7b29819f13417daf9d8481dbbe979b/FLAGbcf49b627 [2019-12-07 13:22:08,799 INFO L306 CDTParser]: Found 1 translation units. [2019-12-07 13:22:08,800 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_6ee30319-8eb7-4e19-9c50-0c0e1826f677/sv-benchmarks/c/array-memsafety/cstrcmp-alloca-2.i [2019-12-07 13:22:08,810 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_6ee30319-8eb7-4e19-9c50-0c0e1826f677/bin/uautomizer/data/734be4d3d/0f7b29819f13417daf9d8481dbbe979b/FLAGbcf49b627 [2019-12-07 13:22:08,819 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_6ee30319-8eb7-4e19-9c50-0c0e1826f677/bin/uautomizer/data/734be4d3d/0f7b29819f13417daf9d8481dbbe979b [2019-12-07 13:22:08,821 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-07 13:22:08,821 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-12-07 13:22:08,822 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-07 13:22:08,822 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-07 13:22:08,824 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-07 13:22:08,825 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 01:22:08" (1/1) ... [2019-12-07 13:22:08,826 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@37cc24a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:22:08, skipping insertion in model container [2019-12-07 13:22:08,826 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 01:22:08" (1/1) ... [2019-12-07 13:22:08,831 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-07 13:22:08,854 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-07 13:22:09,077 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 13:22:09,084 INFO L203 MainTranslator]: Completed pre-run [2019-12-07 13:22:09,119 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 13:22:09,154 INFO L208 MainTranslator]: Completed translation [2019-12-07 13:22:09,154 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:22:09 WrapperNode [2019-12-07 13:22:09,155 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-07 13:22:09,155 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-07 13:22:09,155 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-07 13:22:09,155 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-07 13:22:09,163 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:22:09" (1/1) ... [2019-12-07 13:22:09,163 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:22:09" (1/1) ... [2019-12-07 13:22:09,173 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:22:09" (1/1) ... [2019-12-07 13:22:09,174 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:22:09" (1/1) ... [2019-12-07 13:22:09,183 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:22:09" (1/1) ... [2019-12-07 13:22:09,187 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:22:09" (1/1) ... [2019-12-07 13:22:09,189 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:22:09" (1/1) ... [2019-12-07 13:22:09,193 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-07 13:22:09,194 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-07 13:22:09,194 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-07 13:22:09,194 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-07 13:22:09,194 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:22:09" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6ee30319-8eb7-4e19-9c50-0c0e1826f677/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 [2019-12-07 13:22:09,235 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-12-07 13:22:09,235 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-07 13:22:09,235 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2019-12-07 13:22:09,235 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2019-12-07 13:22:09,235 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2019-12-07 13:22:09,235 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2019-12-07 13:22:09,235 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2019-12-07 13:22:09,235 INFO L138 BoogieDeclarations]: Found implementation of procedure cstrcmp [2019-12-07 13:22:09,236 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-12-07 13:22:09,236 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2019-12-07 13:22:09,236 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2019-12-07 13:22:09,236 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2019-12-07 13:22:09,236 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2019-12-07 13:22:09,236 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2019-12-07 13:22:09,236 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2019-12-07 13:22:09,236 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2019-12-07 13:22:09,236 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2019-12-07 13:22:09,236 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2019-12-07 13:22:09,237 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2019-12-07 13:22:09,237 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2019-12-07 13:22:09,237 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2019-12-07 13:22:09,237 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2019-12-07 13:22:09,237 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2019-12-07 13:22:09,237 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2019-12-07 13:22:09,237 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2019-12-07 13:22:09,237 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2019-12-07 13:22:09,237 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2019-12-07 13:22:09,237 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2019-12-07 13:22:09,238 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2019-12-07 13:22:09,238 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2019-12-07 13:22:09,238 INFO L130 BoogieDeclarations]: Found specification of procedure select [2019-12-07 13:22:09,238 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2019-12-07 13:22:09,238 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2019-12-07 13:22:09,238 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2019-12-07 13:22:09,238 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2019-12-07 13:22:09,238 INFO L130 BoogieDeclarations]: Found specification of procedure random [2019-12-07 13:22:09,238 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2019-12-07 13:22:09,238 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2019-12-07 13:22:09,238 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2019-12-07 13:22:09,239 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2019-12-07 13:22:09,239 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2019-12-07 13:22:09,239 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2019-12-07 13:22:09,239 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2019-12-07 13:22:09,239 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2019-12-07 13:22:09,239 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2019-12-07 13:22:09,239 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2019-12-07 13:22:09,239 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2019-12-07 13:22:09,239 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2019-12-07 13:22:09,239 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2019-12-07 13:22:09,239 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2019-12-07 13:22:09,239 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2019-12-07 13:22:09,240 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2019-12-07 13:22:09,240 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2019-12-07 13:22:09,240 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2019-12-07 13:22:09,240 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2019-12-07 13:22:09,240 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2019-12-07 13:22:09,240 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2019-12-07 13:22:09,240 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2019-12-07 13:22:09,240 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2019-12-07 13:22:09,240 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2019-12-07 13:22:09,240 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2019-12-07 13:22:09,240 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2019-12-07 13:22:09,240 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2019-12-07 13:22:09,241 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2019-12-07 13:22:09,241 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-12-07 13:22:09,241 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2019-12-07 13:22:09,241 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2019-12-07 13:22:09,241 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-12-07 13:22:09,241 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2019-12-07 13:22:09,241 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2019-12-07 13:22:09,241 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2019-12-07 13:22:09,241 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2019-12-07 13:22:09,241 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2019-12-07 13:22:09,242 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2019-12-07 13:22:09,242 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2019-12-07 13:22:09,242 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2019-12-07 13:22:09,242 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-12-07 13:22:09,242 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2019-12-07 13:22:09,242 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2019-12-07 13:22:09,242 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2019-12-07 13:22:09,242 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2019-12-07 13:22:09,242 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2019-12-07 13:22:09,243 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2019-12-07 13:22:09,243 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2019-12-07 13:22:09,243 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2019-12-07 13:22:09,243 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2019-12-07 13:22:09,243 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2019-12-07 13:22:09,243 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2019-12-07 13:22:09,243 INFO L130 BoogieDeclarations]: Found specification of procedure system [2019-12-07 13:22:09,243 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2019-12-07 13:22:09,243 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2019-12-07 13:22:09,244 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2019-12-07 13:22:09,244 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2019-12-07 13:22:09,244 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2019-12-07 13:22:09,244 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2019-12-07 13:22:09,244 INFO L130 BoogieDeclarations]: Found specification of procedure div [2019-12-07 13:22:09,244 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2019-12-07 13:22:09,244 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2019-12-07 13:22:09,244 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2019-12-07 13:22:09,244 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2019-12-07 13:22:09,244 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2019-12-07 13:22:09,245 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2019-12-07 13:22:09,245 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2019-12-07 13:22:09,245 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2019-12-07 13:22:09,245 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2019-12-07 13:22:09,245 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2019-12-07 13:22:09,245 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2019-12-07 13:22:09,245 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2019-12-07 13:22:09,245 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2019-12-07 13:22:09,245 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2019-12-07 13:22:09,245 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2019-12-07 13:22:09,246 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2019-12-07 13:22:09,246 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2019-12-07 13:22:09,246 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2019-12-07 13:22:09,246 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2019-12-07 13:22:09,246 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2019-12-07 13:22:09,246 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-12-07 13:22:09,246 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2019-12-07 13:22:09,246 INFO L130 BoogieDeclarations]: Found specification of procedure cstrcmp [2019-12-07 13:22:09,246 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-12-07 13:22:09,246 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-12-07 13:22:09,246 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-12-07 13:22:09,247 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-12-07 13:22:09,247 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-12-07 13:22:09,247 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-12-07 13:22:09,247 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-07 13:22:09,532 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-07 13:22:09,532 INFO L287 CfgBuilder]: Removed 3 assume(true) statements. [2019-12-07 13:22:09,533 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 01:22:09 BoogieIcfgContainer [2019-12-07 13:22:09,533 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-07 13:22:09,534 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-12-07 13:22:09,534 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-12-07 13:22:09,536 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-12-07 13:22:09,536 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 01:22:08" (1/3) ... [2019-12-07 13:22:09,537 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c3e6186 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 01:22:09, skipping insertion in model container [2019-12-07 13:22:09,537 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:22:09" (2/3) ... [2019-12-07 13:22:09,537 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c3e6186 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 01:22:09, skipping insertion in model container [2019-12-07 13:22:09,537 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 01:22:09" (3/3) ... [2019-12-07 13:22:09,538 INFO L109 eAbstractionObserver]: Analyzing ICFG cstrcmp-alloca-2.i [2019-12-07 13:22:09,544 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-12-07 13:22:09,549 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 19 error locations. [2019-12-07 13:22:09,557 INFO L249 AbstractCegarLoop]: Starting to check reachability of 19 error locations. [2019-12-07 13:22:09,569 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-12-07 13:22:09,569 INFO L374 AbstractCegarLoop]: Hoare is false [2019-12-07 13:22:09,569 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-12-07 13:22:09,569 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-12-07 13:22:09,569 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-07 13:22:09,569 INFO L378 AbstractCegarLoop]: Difference is false [2019-12-07 13:22:09,570 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-07 13:22:09,570 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-12-07 13:22:09,580 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states. [2019-12-07 13:22:09,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-07 13:22:09,586 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:22:09,586 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:22:09,587 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]=== [2019-12-07 13:22:09,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:22:09,590 INFO L82 PathProgramCache]: Analyzing trace with hash 903973826, now seen corresponding path program 1 times [2019-12-07 13:22:09,596 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:22:09,596 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711526202] [2019-12-07 13:22:09,596 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:22:09,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:22:09,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:22:09,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:22:09,734 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711526202] [2019-12-07 13:22:09,734 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 13:22:09,734 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-12-07 13:22:09,735 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326061692] [2019-12-07 13:22:09,738 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-07 13:22:09,738 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:22:09,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-07 13:22:09,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-12-07 13:22:09,748 INFO L87 Difference]: Start difference. First operand 61 states. Second operand 5 states. [2019-12-07 13:22:09,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:22:09,894 INFO L93 Difference]: Finished difference Result 82 states and 91 transitions. [2019-12-07 13:22:09,894 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-07 13:22:09,896 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2019-12-07 13:22:09,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:22:09,905 INFO L225 Difference]: With dead ends: 82 [2019-12-07 13:22:09,905 INFO L226 Difference]: Without dead ends: 78 [2019-12-07 13:22:09,907 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-12-07 13:22:09,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2019-12-07 13:22:09,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 61. [2019-12-07 13:22:09,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-12-07 13:22:09,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 68 transitions. [2019-12-07 13:22:09,945 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 68 transitions. Word has length 11 [2019-12-07 13:22:09,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:22:09,945 INFO L462 AbstractCegarLoop]: Abstraction has 61 states and 68 transitions. [2019-12-07 13:22:09,946 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-07 13:22:09,946 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 68 transitions. [2019-12-07 13:22:09,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-07 13:22:09,946 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:22:09,946 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:22:09,947 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]=== [2019-12-07 13:22:09,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:22:09,947 INFO L82 PathProgramCache]: Analyzing trace with hash 905820868, now seen corresponding path program 1 times [2019-12-07 13:22:09,947 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:22:09,947 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128667316] [2019-12-07 13:22:09,947 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:22:09,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:22:09,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:22:10,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:22:10,003 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128667316] [2019-12-07 13:22:10,003 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 13:22:10,003 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-12-07 13:22:10,004 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725580551] [2019-12-07 13:22:10,005 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-07 13:22:10,005 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:22:10,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-07 13:22:10,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-12-07 13:22:10,006 INFO L87 Difference]: Start difference. First operand 61 states and 68 transitions. Second operand 4 states. [2019-12-07 13:22:10,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:22:10,086 INFO L93 Difference]: Finished difference Result 59 states and 66 transitions. [2019-12-07 13:22:10,087 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-07 13:22:10,087 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2019-12-07 13:22:10,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:22:10,088 INFO L225 Difference]: With dead ends: 59 [2019-12-07 13:22:10,088 INFO L226 Difference]: Without dead ends: 59 [2019-12-07 13:22:10,088 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-12-07 13:22:10,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-12-07 13:22:10,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2019-12-07 13:22:10,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-12-07 13:22:10,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 66 transitions. [2019-12-07 13:22:10,093 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 66 transitions. Word has length 11 [2019-12-07 13:22:10,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:22:10,093 INFO L462 AbstractCegarLoop]: Abstraction has 59 states and 66 transitions. [2019-12-07 13:22:10,094 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-07 13:22:10,094 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 66 transitions. [2019-12-07 13:22:10,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-07 13:22:10,094 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:22:10,094 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:22:10,094 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]=== [2019-12-07 13:22:10,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:22:10,094 INFO L82 PathProgramCache]: Analyzing trace with hash 905820869, now seen corresponding path program 1 times [2019-12-07 13:22:10,095 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:22:10,095 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936649162] [2019-12-07 13:22:10,095 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:22:10,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:22:10,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:22:10,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:22:10,154 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936649162] [2019-12-07 13:22:10,154 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 13:22:10,154 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-12-07 13:22:10,154 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954932658] [2019-12-07 13:22:10,154 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-07 13:22:10,155 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:22:10,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-07 13:22:10,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-12-07 13:22:10,155 INFO L87 Difference]: Start difference. First operand 59 states and 66 transitions. Second operand 5 states. [2019-12-07 13:22:10,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:22:10,283 INFO L93 Difference]: Finished difference Result 79 states and 88 transitions. [2019-12-07 13:22:10,283 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-07 13:22:10,284 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2019-12-07 13:22:10,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:22:10,284 INFO L225 Difference]: With dead ends: 79 [2019-12-07 13:22:10,285 INFO L226 Difference]: Without dead ends: 79 [2019-12-07 13:22:10,285 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-12-07 13:22:10,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2019-12-07 13:22:10,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 61. [2019-12-07 13:22:10,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-12-07 13:22:10,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 69 transitions. [2019-12-07 13:22:10,290 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 69 transitions. Word has length 11 [2019-12-07 13:22:10,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:22:10,290 INFO L462 AbstractCegarLoop]: Abstraction has 61 states and 69 transitions. [2019-12-07 13:22:10,290 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-07 13:22:10,290 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 69 transitions. [2019-12-07 13:22:10,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-07 13:22:10,291 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:22:10,291 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:22:10,291 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]=== [2019-12-07 13:22:10,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:22:10,291 INFO L82 PathProgramCache]: Analyzing trace with hash 1135404026, now seen corresponding path program 1 times [2019-12-07 13:22:10,291 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:22:10,291 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141112832] [2019-12-07 13:22:10,292 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:22:10,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:22:10,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:22:10,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:22:10,335 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141112832] [2019-12-07 13:22:10,335 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 13:22:10,335 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-12-07 13:22:10,335 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92682361] [2019-12-07 13:22:10,335 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-07 13:22:10,335 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:22:10,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-07 13:22:10,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-12-07 13:22:10,336 INFO L87 Difference]: Start difference. First operand 61 states and 69 transitions. Second operand 5 states. [2019-12-07 13:22:10,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:22:10,414 INFO L93 Difference]: Finished difference Result 60 states and 68 transitions. [2019-12-07 13:22:10,414 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-07 13:22:10,414 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2019-12-07 13:22:10,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:22:10,415 INFO L225 Difference]: With dead ends: 60 [2019-12-07 13:22:10,415 INFO L226 Difference]: Without dead ends: 60 [2019-12-07 13:22:10,415 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-12-07 13:22:10,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-12-07 13:22:10,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2019-12-07 13:22:10,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2019-12-07 13:22:10,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 68 transitions. [2019-12-07 13:22:10,419 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 68 transitions. Word has length 13 [2019-12-07 13:22:10,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:22:10,419 INFO L462 AbstractCegarLoop]: Abstraction has 60 states and 68 transitions. [2019-12-07 13:22:10,419 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-07 13:22:10,419 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 68 transitions. [2019-12-07 13:22:10,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-07 13:22:10,420 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:22:10,420 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:22:10,420 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]=== [2019-12-07 13:22:10,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:22:10,420 INFO L82 PathProgramCache]: Analyzing trace with hash 1135404079, now seen corresponding path program 1 times [2019-12-07 13:22:10,421 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:22:10,421 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397940380] [2019-12-07 13:22:10,421 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:22:10,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:22:10,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:22:10,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:22:10,473 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397940380] [2019-12-07 13:22:10,473 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 13:22:10,473 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-12-07 13:22:10,473 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65314122] [2019-12-07 13:22:10,473 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-12-07 13:22:10,474 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:22:10,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-12-07 13:22:10,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-12-07 13:22:10,474 INFO L87 Difference]: Start difference. First operand 60 states and 68 transitions. Second operand 6 states. [2019-12-07 13:22:10,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:22:10,595 INFO L93 Difference]: Finished difference Result 73 states and 82 transitions. [2019-12-07 13:22:10,595 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-07 13:22:10,595 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2019-12-07 13:22:10,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:22:10,596 INFO L225 Difference]: With dead ends: 73 [2019-12-07 13:22:10,596 INFO L226 Difference]: Without dead ends: 73 [2019-12-07 13:22:10,596 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-12-07 13:22:10,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2019-12-07 13:22:10,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 62. [2019-12-07 13:22:10,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-12-07 13:22:10,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 72 transitions. [2019-12-07 13:22:10,601 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 72 transitions. Word has length 13 [2019-12-07 13:22:10,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:22:10,601 INFO L462 AbstractCegarLoop]: Abstraction has 62 states and 72 transitions. [2019-12-07 13:22:10,601 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-12-07 13:22:10,601 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 72 transitions. [2019-12-07 13:22:10,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-07 13:22:10,601 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:22:10,602 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:22:10,602 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]=== [2019-12-07 13:22:10,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:22:10,602 INFO L82 PathProgramCache]: Analyzing trace with hash 1135404078, now seen corresponding path program 1 times [2019-12-07 13:22:10,602 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:22:10,602 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237965575] [2019-12-07 13:22:10,603 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:22:10,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:22:10,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:22:10,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:22:10,634 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237965575] [2019-12-07 13:22:10,635 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 13:22:10,635 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-12-07 13:22:10,635 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777333307] [2019-12-07 13:22:10,635 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-07 13:22:10,635 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:22:10,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-07 13:22:10,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-12-07 13:22:10,636 INFO L87 Difference]: Start difference. First operand 62 states and 72 transitions. Second operand 4 states. [2019-12-07 13:22:10,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:22:10,707 INFO L93 Difference]: Finished difference Result 60 states and 69 transitions. [2019-12-07 13:22:10,707 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-07 13:22:10,707 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2019-12-07 13:22:10,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:22:10,708 INFO L225 Difference]: With dead ends: 60 [2019-12-07 13:22:10,708 INFO L226 Difference]: Without dead ends: 60 [2019-12-07 13:22:10,708 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-12-07 13:22:10,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-12-07 13:22:10,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2019-12-07 13:22:10,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2019-12-07 13:22:10,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 69 transitions. [2019-12-07 13:22:10,711 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 69 transitions. Word has length 13 [2019-12-07 13:22:10,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:22:10,711 INFO L462 AbstractCegarLoop]: Abstraction has 60 states and 69 transitions. [2019-12-07 13:22:10,711 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-07 13:22:10,711 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 69 transitions. [2019-12-07 13:22:10,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-07 13:22:10,712 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:22:10,712 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:22:10,712 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]=== [2019-12-07 13:22:10,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:22:10,712 INFO L82 PathProgramCache]: Analyzing trace with hash 837786484, now seen corresponding path program 1 times [2019-12-07 13:22:10,712 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:22:10,712 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732705798] [2019-12-07 13:22:10,712 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:22:10,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:22:10,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:22:10,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:22:10,747 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732705798] [2019-12-07 13:22:10,747 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 13:22:10,747 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-12-07 13:22:10,748 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817464319] [2019-12-07 13:22:10,748 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-07 13:22:10,748 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:22:10,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-07 13:22:10,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-12-07 13:22:10,748 INFO L87 Difference]: Start difference. First operand 60 states and 69 transitions. Second operand 5 states. [2019-12-07 13:22:10,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:22:10,809 INFO L93 Difference]: Finished difference Result 59 states and 68 transitions. [2019-12-07 13:22:10,809 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-07 13:22:10,809 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2019-12-07 13:22:10,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:22:10,810 INFO L225 Difference]: With dead ends: 59 [2019-12-07 13:22:10,810 INFO L226 Difference]: Without dead ends: 59 [2019-12-07 13:22:10,810 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-12-07 13:22:10,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-12-07 13:22:10,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2019-12-07 13:22:10,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-12-07 13:22:10,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 68 transitions. [2019-12-07 13:22:10,813 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 68 transitions. Word has length 14 [2019-12-07 13:22:10,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:22:10,813 INFO L462 AbstractCegarLoop]: Abstraction has 59 states and 68 transitions. [2019-12-07 13:22:10,813 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-07 13:22:10,813 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 68 transitions. [2019-12-07 13:22:10,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-12-07 13:22:10,814 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:22:10,814 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:22:10,814 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]=== [2019-12-07 13:22:10,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:22:10,814 INFO L82 PathProgramCache]: Analyzing trace with hash 930202632, now seen corresponding path program 1 times [2019-12-07 13:22:10,814 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:22:10,814 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486695124] [2019-12-07 13:22:10,815 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:22:10,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:22:10,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:22:10,865 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:22:10,865 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486695124] [2019-12-07 13:22:10,865 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328945461] [2019-12-07 13:22:10,866 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6ee30319-8eb7-4e19-9c50-0c0e1826f677/bin/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:22:10,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:22:10,925 INFO L264 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-07 13:22:10,928 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:22:10,959 INFO L430 ElimStorePlain]: Different costs {0=[|v_#length_24|], 1=[|v_#valid_33|]} [2019-12-07 13:22:10,966 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-12-07 13:22:10,972 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 [2019-12-07 13:22:10,973 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 13:22:10,980 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:22:10,985 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 [2019-12-07 13:22:10,986 INFO L534 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-12-07 13:22:10,992 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:22:10,993 INFO L534 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-12-07 13:22:10,993 INFO L239 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:24, output treesize:12 [2019-12-07 13:22:11,003 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:22:11,003 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 13:22:11,003 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 6 [2019-12-07 13:22:11,004 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94261310] [2019-12-07 13:22:11,004 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-07 13:22:11,004 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:22:11,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-07 13:22:11,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-12-07 13:22:11,004 INFO L87 Difference]: Start difference. First operand 59 states and 68 transitions. Second operand 7 states. [2019-12-07 13:22:11,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:22:11,130 INFO L93 Difference]: Finished difference Result 74 states and 85 transitions. [2019-12-07 13:22:11,131 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-07 13:22:11,131 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 15 [2019-12-07 13:22:11,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:22:11,131 INFO L225 Difference]: With dead ends: 74 [2019-12-07 13:22:11,131 INFO L226 Difference]: Without dead ends: 74 [2019-12-07 13:22:11,132 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-12-07 13:22:11,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2019-12-07 13:22:11,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 56. [2019-12-07 13:22:11,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2019-12-07 13:22:11,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 64 transitions. [2019-12-07 13:22:11,135 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 64 transitions. Word has length 15 [2019-12-07 13:22:11,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:22:11,135 INFO L462 AbstractCegarLoop]: Abstraction has 56 states and 64 transitions. [2019-12-07 13:22:11,135 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-07 13:22:11,135 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 64 transitions. [2019-12-07 13:22:11,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-12-07 13:22:11,136 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:22:11,136 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:22:11,336 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:22:11,337 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]=== [2019-12-07 13:22:11,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:22:11,338 INFO L82 PathProgramCache]: Analyzing trace with hash 442243660, now seen corresponding path program 1 times [2019-12-07 13:22:11,339 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:22:11,339 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102689911] [2019-12-07 13:22:11,339 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:22:11,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:22:11,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:22:11,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:22:11,406 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102689911] [2019-12-07 13:22:11,406 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 13:22:11,406 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-12-07 13:22:11,406 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494908307] [2019-12-07 13:22:11,406 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-12-07 13:22:11,406 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:22:11,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-12-07 13:22:11,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-12-07 13:22:11,407 INFO L87 Difference]: Start difference. First operand 56 states and 64 transitions. Second operand 6 states. [2019-12-07 13:22:11,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:22:11,492 INFO L93 Difference]: Finished difference Result 53 states and 61 transitions. [2019-12-07 13:22:11,492 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-07 13:22:11,492 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2019-12-07 13:22:11,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:22:11,492 INFO L225 Difference]: With dead ends: 53 [2019-12-07 13:22:11,492 INFO L226 Difference]: Without dead ends: 53 [2019-12-07 13:22:11,493 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-12-07 13:22:11,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-12-07 13:22:11,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2019-12-07 13:22:11,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-12-07 13:22:11,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 61 transitions. [2019-12-07 13:22:11,495 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 61 transitions. Word has length 17 [2019-12-07 13:22:11,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:22:11,495 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 61 transitions. [2019-12-07 13:22:11,495 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-12-07 13:22:11,495 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 61 transitions. [2019-12-07 13:22:11,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-12-07 13:22:11,496 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:22:11,496 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:22:11,496 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]=== [2019-12-07 13:22:11,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:22:11,496 INFO L82 PathProgramCache]: Analyzing trace with hash 442243661, now seen corresponding path program 1 times [2019-12-07 13:22:11,496 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:22:11,496 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766546177] [2019-12-07 13:22:11,496 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:22:11,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:22:11,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:22:11,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:22:11,553 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766546177] [2019-12-07 13:22:11,553 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 13:22:11,553 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-12-07 13:22:11,554 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699988354] [2019-12-07 13:22:11,554 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-07 13:22:11,554 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:22:11,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-07 13:22:11,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2019-12-07 13:22:11,554 INFO L87 Difference]: Start difference. First operand 53 states and 61 transitions. Second operand 8 states. [2019-12-07 13:22:11,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:22:11,699 INFO L93 Difference]: Finished difference Result 72 states and 83 transitions. [2019-12-07 13:22:11,700 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-07 13:22:11,700 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 17 [2019-12-07 13:22:11,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:22:11,701 INFO L225 Difference]: With dead ends: 72 [2019-12-07 13:22:11,701 INFO L226 Difference]: Without dead ends: 72 [2019-12-07 13:22:11,702 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2019-12-07 13:22:11,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2019-12-07 13:22:11,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 61. [2019-12-07 13:22:11,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-12-07 13:22:11,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 73 transitions. [2019-12-07 13:22:11,704 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 73 transitions. Word has length 17 [2019-12-07 13:22:11,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:22:11,705 INFO L462 AbstractCegarLoop]: Abstraction has 61 states and 73 transitions. [2019-12-07 13:22:11,705 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-07 13:22:11,705 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 73 transitions. [2019-12-07 13:22:11,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-12-07 13:22:11,705 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:22:11,705 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:22:11,705 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]=== [2019-12-07 13:22:11,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:22:11,705 INFO L82 PathProgramCache]: Analyzing trace with hash 490904818, now seen corresponding path program 1 times [2019-12-07 13:22:11,706 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:22:11,706 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422015277] [2019-12-07 13:22:11,706 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:22:11,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:22:11,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:22:11,761 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:22:11,761 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422015277] [2019-12-07 13:22:11,761 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702391554] [2019-12-07 13:22:11,761 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6ee30319-8eb7-4e19-9c50-0c0e1826f677/bin/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:22:11,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:22:11,818 INFO L264 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-07 13:22:11,819 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:22:11,831 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:22:11,831 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 [2019-12-07 13:22:11,832 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 13:22:11,845 INFO L614 ElimStorePlain]: treesize reduction 10, result has 64.3 percent of original size [2019-12-07 13:22:11,845 INFO L534 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-12-07 13:22:11,846 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:13, output treesize:9 [2019-12-07 13:22:11,855 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:22:11,855 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 13:22:11,855 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2019-12-07 13:22:11,855 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722459473] [2019-12-07 13:22:11,855 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-07 13:22:11,855 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:22:11,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-07 13:22:11,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-12-07 13:22:11,856 INFO L87 Difference]: Start difference. First operand 61 states and 73 transitions. Second operand 7 states. [2019-12-07 13:22:11,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:22:11,970 INFO L93 Difference]: Finished difference Result 68 states and 80 transitions. [2019-12-07 13:22:11,970 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-07 13:22:11,970 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 17 [2019-12-07 13:22:11,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:22:11,971 INFO L225 Difference]: With dead ends: 68 [2019-12-07 13:22:11,971 INFO L226 Difference]: Without dead ends: 68 [2019-12-07 13:22:11,971 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-12-07 13:22:11,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2019-12-07 13:22:11,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 58. [2019-12-07 13:22:11,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-12-07 13:22:11,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 69 transitions. [2019-12-07 13:22:11,974 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 69 transitions. Word has length 17 [2019-12-07 13:22:11,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:22:11,974 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 69 transitions. [2019-12-07 13:22:11,974 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-07 13:22:11,974 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 69 transitions. [2019-12-07 13:22:11,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-12-07 13:22:11,975 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:22:11,975 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] [2019-12-07 13:22:12,175 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:22:12,176 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]=== [2019-12-07 13:22:12,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:22:12,177 INFO L82 PathProgramCache]: Analyzing trace with hash -18493692, now seen corresponding path program 1 times [2019-12-07 13:22:12,177 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:22:12,177 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110616875] [2019-12-07 13:22:12,178 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:22:12,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:22:12,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:22:12,231 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:22:12,232 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110616875] [2019-12-07 13:22:12,232 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 13:22:12,232 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-12-07 13:22:12,232 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007656593] [2019-12-07 13:22:12,232 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-07 13:22:12,232 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:22:12,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-07 13:22:12,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-12-07 13:22:12,233 INFO L87 Difference]: Start difference. First operand 58 states and 69 transitions. Second operand 4 states. [2019-12-07 13:22:12,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:22:12,287 INFO L93 Difference]: Finished difference Result 60 states and 71 transitions. [2019-12-07 13:22:12,287 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-07 13:22:12,287 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2019-12-07 13:22:12,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:22:12,288 INFO L225 Difference]: With dead ends: 60 [2019-12-07 13:22:12,288 INFO L226 Difference]: Without dead ends: 60 [2019-12-07 13:22:12,288 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-12-07 13:22:12,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-12-07 13:22:12,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2019-12-07 13:22:12,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2019-12-07 13:22:12,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 71 transitions. [2019-12-07 13:22:12,290 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 71 transitions. Word has length 21 [2019-12-07 13:22:12,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:22:12,290 INFO L462 AbstractCegarLoop]: Abstraction has 60 states and 71 transitions. [2019-12-07 13:22:12,290 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-07 13:22:12,290 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 71 transitions. [2019-12-07 13:22:12,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-12-07 13:22:12,291 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:22:12,291 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] [2019-12-07 13:22:12,291 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]=== [2019-12-07 13:22:12,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:22:12,291 INFO L82 PathProgramCache]: Analyzing trace with hash -18502766, now seen corresponding path program 1 times [2019-12-07 13:22:12,291 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:22:12,291 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863019468] [2019-12-07 13:22:12,291 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:22:12,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:22:12,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:22:12,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:22:12,319 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863019468] [2019-12-07 13:22:12,319 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 13:22:12,319 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-12-07 13:22:12,319 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497885408] [2019-12-07 13:22:12,320 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-12-07 13:22:12,320 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:22:12,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-12-07 13:22:12,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-12-07 13:22:12,320 INFO L87 Difference]: Start difference. First operand 60 states and 71 transitions. Second operand 6 states. [2019-12-07 13:22:12,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:22:12,396 INFO L93 Difference]: Finished difference Result 58 states and 68 transitions. [2019-12-07 13:22:12,396 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-07 13:22:12,396 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2019-12-07 13:22:12,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:22:12,397 INFO L225 Difference]: With dead ends: 58 [2019-12-07 13:22:12,397 INFO L226 Difference]: Without dead ends: 58 [2019-12-07 13:22:12,397 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-12-07 13:22:12,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2019-12-07 13:22:12,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2019-12-07 13:22:12,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-12-07 13:22:12,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 68 transitions. [2019-12-07 13:22:12,399 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 68 transitions. Word has length 21 [2019-12-07 13:22:12,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:22:12,399 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 68 transitions. [2019-12-07 13:22:12,399 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-12-07 13:22:12,399 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 68 transitions. [2019-12-07 13:22:12,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-12-07 13:22:12,400 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:22:12,400 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] [2019-12-07 13:22:12,400 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]=== [2019-12-07 13:22:12,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:22:12,400 INFO L82 PathProgramCache]: Analyzing trace with hash -18502765, now seen corresponding path program 1 times [2019-12-07 13:22:12,400 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:22:12,400 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629833256] [2019-12-07 13:22:12,400 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:22:12,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:22:12,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:22:12,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:22:12,458 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629833256] [2019-12-07 13:22:12,458 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 13:22:12,458 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-12-07 13:22:12,458 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660139614] [2019-12-07 13:22:12,458 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-07 13:22:12,458 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:22:12,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-07 13:22:12,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2019-12-07 13:22:12,459 INFO L87 Difference]: Start difference. First operand 58 states and 68 transitions. Second operand 8 states. [2019-12-07 13:22:12,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:22:12,591 INFO L93 Difference]: Finished difference Result 65 states and 75 transitions. [2019-12-07 13:22:12,591 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-07 13:22:12,591 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 21 [2019-12-07 13:22:12,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:22:12,592 INFO L225 Difference]: With dead ends: 65 [2019-12-07 13:22:12,592 INFO L226 Difference]: Without dead ends: 65 [2019-12-07 13:22:12,592 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2019-12-07 13:22:12,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-12-07 13:22:12,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 60. [2019-12-07 13:22:12,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2019-12-07 13:22:12,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 69 transitions. [2019-12-07 13:22:12,594 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 69 transitions. Word has length 21 [2019-12-07 13:22:12,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:22:12,594 INFO L462 AbstractCegarLoop]: Abstraction has 60 states and 69 transitions. [2019-12-07 13:22:12,594 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-07 13:22:12,594 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 69 transitions. [2019-12-07 13:22:12,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-12-07 13:22:12,595 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:22:12,595 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:22:12,595 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]=== [2019-12-07 13:22:12,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:22:12,596 INFO L82 PathProgramCache]: Analyzing trace with hash -1460095726, now seen corresponding path program 1 times [2019-12-07 13:22:12,596 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:22:12,596 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433977619] [2019-12-07 13:22:12,596 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:22:12,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:22:12,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:22:12,763 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:22:12,763 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433977619] [2019-12-07 13:22:12,763 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 13:22:12,763 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2019-12-07 13:22:12,763 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375947150] [2019-12-07 13:22:12,764 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-07 13:22:12,764 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:22:12,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-07 13:22:12,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2019-12-07 13:22:12,764 INFO L87 Difference]: Start difference. First operand 60 states and 69 transitions. Second operand 16 states. [2019-12-07 13:22:13,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:22:13,149 INFO L93 Difference]: Finished difference Result 95 states and 107 transitions. [2019-12-07 13:22:13,150 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-07 13:22:13,150 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 24 [2019-12-07 13:22:13,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:22:13,150 INFO L225 Difference]: With dead ends: 95 [2019-12-07 13:22:13,150 INFO L226 Difference]: Without dead ends: 95 [2019-12-07 13:22:13,151 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=170, Invalid=642, Unknown=0, NotChecked=0, Total=812 [2019-12-07 13:22:13,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2019-12-07 13:22:13,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 80. [2019-12-07 13:22:13,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2019-12-07 13:22:13,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 92 transitions. [2019-12-07 13:22:13,153 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 92 transitions. Word has length 24 [2019-12-07 13:22:13,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:22:13,153 INFO L462 AbstractCegarLoop]: Abstraction has 80 states and 92 transitions. [2019-12-07 13:22:13,153 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-07 13:22:13,153 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 92 transitions. [2019-12-07 13:22:13,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-12-07 13:22:13,154 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:22:13,154 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:22:13,154 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]=== [2019-12-07 13:22:13,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:22:13,154 INFO L82 PathProgramCache]: Analyzing trace with hash -76483473, now seen corresponding path program 1 times [2019-12-07 13:22:13,155 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:22:13,155 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173491988] [2019-12-07 13:22:13,155 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:22:13,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:22:13,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:22:13,257 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 13:22:13,257 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173491988] [2019-12-07 13:22:13,257 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 13:22:13,257 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2019-12-07 13:22:13,257 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868051702] [2019-12-07 13:22:13,257 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-07 13:22:13,258 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:22:13,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-07 13:22:13,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2019-12-07 13:22:13,258 INFO L87 Difference]: Start difference. First operand 80 states and 92 transitions. Second operand 10 states. [2019-12-07 13:22:13,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:22:13,474 INFO L93 Difference]: Finished difference Result 122 states and 137 transitions. [2019-12-07 13:22:13,475 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-07 13:22:13,475 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2019-12-07 13:22:13,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:22:13,476 INFO L225 Difference]: With dead ends: 122 [2019-12-07 13:22:13,476 INFO L226 Difference]: Without dead ends: 122 [2019-12-07 13:22:13,477 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2019-12-07 13:22:13,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2019-12-07 13:22:13,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 101. [2019-12-07 13:22:13,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2019-12-07 13:22:13,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 115 transitions. [2019-12-07 13:22:13,481 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 115 transitions. Word has length 28 [2019-12-07 13:22:13,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:22:13,481 INFO L462 AbstractCegarLoop]: Abstraction has 101 states and 115 transitions. [2019-12-07 13:22:13,481 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-07 13:22:13,482 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 115 transitions. [2019-12-07 13:22:13,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-12-07 13:22:13,483 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:22:13,483 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:22:13,483 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]=== [2019-12-07 13:22:13,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:22:13,483 INFO L82 PathProgramCache]: Analyzing trace with hash 142371245, now seen corresponding path program 1 times [2019-12-07 13:22:13,484 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:22:13,484 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306453560] [2019-12-07 13:22:13,484 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:22:13,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:22:13,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:22:13,636 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 13:22:13,636 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306453560] [2019-12-07 13:22:13,636 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 13:22:13,636 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2019-12-07 13:22:13,636 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710823697] [2019-12-07 13:22:13,637 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-12-07 13:22:13,637 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:22:13,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-12-07 13:22:13,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2019-12-07 13:22:13,637 INFO L87 Difference]: Start difference. First operand 101 states and 115 transitions. Second operand 11 states. [2019-12-07 13:22:13,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:22:13,883 INFO L93 Difference]: Finished difference Result 147 states and 165 transitions. [2019-12-07 13:22:13,883 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-12-07 13:22:13,883 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 28 [2019-12-07 13:22:13,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:22:13,885 INFO L225 Difference]: With dead ends: 147 [2019-12-07 13:22:13,885 INFO L226 Difference]: Without dead ends: 147 [2019-12-07 13:22:13,885 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2019-12-07 13:22:13,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2019-12-07 13:22:13,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 102. [2019-12-07 13:22:13,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2019-12-07 13:22:13,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 117 transitions. [2019-12-07 13:22:13,889 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 117 transitions. Word has length 28 [2019-12-07 13:22:13,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:22:13,890 INFO L462 AbstractCegarLoop]: Abstraction has 102 states and 117 transitions. [2019-12-07 13:22:13,890 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-12-07 13:22:13,890 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 117 transitions. [2019-12-07 13:22:13,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-12-07 13:22:13,891 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:22:13,891 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:22:13,891 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]=== [2019-12-07 13:22:13,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:22:13,891 INFO L82 PathProgramCache]: Analyzing trace with hash -1893037799, now seen corresponding path program 1 times [2019-12-07 13:22:13,891 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:22:13,891 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132867646] [2019-12-07 13:22:13,892 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:22:13,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:22:13,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:22:13,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:22:14,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:22:14,099 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132867646] [2019-12-07 13:22:14,099 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 13:22:14,099 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2019-12-07 13:22:14,099 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096475857] [2019-12-07 13:22:14,100 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-12-07 13:22:14,100 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:22:14,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-12-07 13:22:14,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2019-12-07 13:22:14,101 INFO L87 Difference]: Start difference. First operand 102 states and 117 transitions. Second operand 17 states. [2019-12-07 13:22:14,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:22:14,442 INFO L93 Difference]: Finished difference Result 146 states and 164 transitions. [2019-12-07 13:22:14,442 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-07 13:22:14,442 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 30 [2019-12-07 13:22:14,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:22:14,443 INFO L225 Difference]: With dead ends: 146 [2019-12-07 13:22:14,443 INFO L226 Difference]: Without dead ends: 143 [2019-12-07 13:22:14,444 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=143, Invalid=669, Unknown=0, NotChecked=0, Total=812 [2019-12-07 13:22:14,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2019-12-07 13:22:14,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 115. [2019-12-07 13:22:14,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2019-12-07 13:22:14,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 132 transitions. [2019-12-07 13:22:14,449 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 132 transitions. Word has length 30 [2019-12-07 13:22:14,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:22:14,449 INFO L462 AbstractCegarLoop]: Abstraction has 115 states and 132 transitions. [2019-12-07 13:22:14,449 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-12-07 13:22:14,449 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 132 transitions. [2019-12-07 13:22:14,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-12-07 13:22:14,450 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:22:14,451 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:22:14,451 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]=== [2019-12-07 13:22:14,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:22:14,451 INFO L82 PathProgramCache]: Analyzing trace with hash -1835779497, now seen corresponding path program 1 times [2019-12-07 13:22:14,451 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:22:14,451 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336403577] [2019-12-07 13:22:14,451 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:22:14,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:22:14,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:22:14,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:22:14,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:22:14,502 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336403577] [2019-12-07 13:22:14,502 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 13:22:14,502 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-12-07 13:22:14,502 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874067740] [2019-12-07 13:22:14,503 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-07 13:22:14,503 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:22:14,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-07 13:22:14,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-12-07 13:22:14,503 INFO L87 Difference]: Start difference. First operand 115 states and 132 transitions. Second operand 5 states. [2019-12-07 13:22:14,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:22:14,557 INFO L93 Difference]: Finished difference Result 114 states and 131 transitions. [2019-12-07 13:22:14,557 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-07 13:22:14,557 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 30 [2019-12-07 13:22:14,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:22:14,558 INFO L225 Difference]: With dead ends: 114 [2019-12-07 13:22:14,558 INFO L226 Difference]: Without dead ends: 47 [2019-12-07 13:22:14,558 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-12-07 13:22:14,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-12-07 13:22:14,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2019-12-07 13:22:14,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-12-07 13:22:14,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2019-12-07 13:22:14,559 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 30 [2019-12-07 13:22:14,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:22:14,559 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2019-12-07 13:22:14,559 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-07 13:22:14,559 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2019-12-07 13:22:14,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-12-07 13:22:14,560 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:22:14,560 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:22:14,560 INFO L410 AbstractCegarLoop]: === Iteration 20 === [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]=== [2019-12-07 13:22:14,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:22:14,560 INFO L82 PathProgramCache]: Analyzing trace with hash 816426698, now seen corresponding path program 1 times [2019-12-07 13:22:14,560 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:22:14,561 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056953579] [2019-12-07 13:22:14,561 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:22:14,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:22:14,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:22:14,625 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 13:22:14,625 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056953579] [2019-12-07 13:22:14,625 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953773780] [2019-12-07 13:22:14,625 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6ee30319-8eb7-4e19-9c50-0c0e1826f677/bin/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:22:14,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:22:14,690 INFO L264 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 17 conjunts are in the unsatisfiable core [2019-12-07 13:22:14,691 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:22:14,746 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 13:22:14,746 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 13:22:14,746 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 15 [2019-12-07 13:22:14,746 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955652019] [2019-12-07 13:22:14,747 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-07 13:22:14,747 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:22:14,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-07 13:22:14,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2019-12-07 13:22:14,747 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand 16 states. [2019-12-07 13:22:14,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:22:14,951 INFO L93 Difference]: Finished difference Result 60 states and 65 transitions. [2019-12-07 13:22:14,951 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-07 13:22:14,951 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 32 [2019-12-07 13:22:14,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:22:14,952 INFO L225 Difference]: With dead ends: 60 [2019-12-07 13:22:14,952 INFO L226 Difference]: Without dead ends: 60 [2019-12-07 13:22:14,952 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2019-12-07 13:22:14,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-12-07 13:22:14,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 56. [2019-12-07 13:22:14,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2019-12-07 13:22:14,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 63 transitions. [2019-12-07 13:22:14,954 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 63 transitions. Word has length 32 [2019-12-07 13:22:14,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:22:14,954 INFO L462 AbstractCegarLoop]: Abstraction has 56 states and 63 transitions. [2019-12-07 13:22:14,954 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-07 13:22:14,954 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 63 transitions. [2019-12-07 13:22:14,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-12-07 13:22:14,955 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:22:14,955 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:22:15,155 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:22:15,156 INFO L410 AbstractCegarLoop]: === Iteration 21 === [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]=== [2019-12-07 13:22:15,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:22:15,157 INFO L82 PathProgramCache]: Analyzing trace with hash 1395308944, now seen corresponding path program 1 times [2019-12-07 13:22:15,157 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:22:15,158 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079459926] [2019-12-07 13:22:15,158 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:22:15,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:22:15,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:22:15,265 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 13:22:15,265 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079459926] [2019-12-07 13:22:15,265 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603711781] [2019-12-07 13:22:15,265 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6ee30319-8eb7-4e19-9c50-0c0e1826f677/bin/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:22:15,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:22:15,326 INFO L264 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 17 conjunts are in the unsatisfiable core [2019-12-07 13:22:15,328 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:22:15,390 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 13:22:15,390 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 13:22:15,390 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 15 [2019-12-07 13:22:15,390 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909697249] [2019-12-07 13:22:15,390 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-07 13:22:15,391 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:22:15,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-07 13:22:15,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2019-12-07 13:22:15,391 INFO L87 Difference]: Start difference. First operand 56 states and 63 transitions. Second operand 16 states. [2019-12-07 13:22:15,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:22:15,608 INFO L93 Difference]: Finished difference Result 58 states and 63 transitions. [2019-12-07 13:22:15,608 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-07 13:22:15,608 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 36 [2019-12-07 13:22:15,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:22:15,608 INFO L225 Difference]: With dead ends: 58 [2019-12-07 13:22:15,609 INFO L226 Difference]: Without dead ends: 54 [2019-12-07 13:22:15,609 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2019-12-07 13:22:15,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-12-07 13:22:15,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2019-12-07 13:22:15,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-12-07 13:22:15,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 58 transitions. [2019-12-07 13:22:15,610 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 58 transitions. Word has length 36 [2019-12-07 13:22:15,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:22:15,610 INFO L462 AbstractCegarLoop]: Abstraction has 54 states and 58 transitions. [2019-12-07 13:22:15,610 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-07 13:22:15,610 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 58 transitions. [2019-12-07 13:22:15,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-12-07 13:22:15,611 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:22:15,611 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:22:15,811 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:22:15,812 INFO L410 AbstractCegarLoop]: === Iteration 22 === [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]=== [2019-12-07 13:22:15,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:22:15,813 INFO L82 PathProgramCache]: Analyzing trace with hash 955222517, now seen corresponding path program 2 times [2019-12-07 13:22:15,813 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:22:15,814 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238511493] [2019-12-07 13:22:15,814 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:22:15,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:22:16,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:22:16,135 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 13:22:16,135 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238511493] [2019-12-07 13:22:16,135 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218299018] [2019-12-07 13:22:16,135 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6ee30319-8eb7-4e19-9c50-0c0e1826f677/bin/uautomizer/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:22:16,194 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-07 13:22:16,194 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 13:22:16,195 INFO L264 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 30 conjunts are in the unsatisfiable core [2019-12-07 13:22:16,197 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:22:16,251 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 14 treesize of output 10 [2019-12-07 13:22:16,252 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 13:22:16,255 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:22:16,256 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-12-07 13:22:16,256 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:17 [2019-12-07 13:22:16,519 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:22:16,519 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 52 [2019-12-07 13:22:16,520 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 13:22:16,537 INFO L614 ElimStorePlain]: treesize reduction 26, result has 46.9 percent of original size [2019-12-07 13:22:16,538 INFO L534 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 13:22:16,538 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:39, output treesize:8 [2019-12-07 13:22:16,557 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 13:22:16,579 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 13:22:16,580 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 13:22:16,580 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 27 [2019-12-07 13:22:16,580 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897571015] [2019-12-07 13:22:16,580 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-12-07 13:22:16,580 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:22:16,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-12-07 13:22:16,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=639, Unknown=0, NotChecked=0, Total=702 [2019-12-07 13:22:16,581 INFO L87 Difference]: Start difference. First operand 54 states and 58 transitions. Second operand 27 states. [2019-12-07 13:22:17,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:22:17,867 INFO L93 Difference]: Finished difference Result 127 states and 132 transitions. [2019-12-07 13:22:17,867 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2019-12-07 13:22:17,867 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 39 [2019-12-07 13:22:17,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:22:17,868 INFO L225 Difference]: With dead ends: 127 [2019-12-07 13:22:17,868 INFO L226 Difference]: Without dead ends: 68 [2019-12-07 13:22:17,869 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 617 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=346, Invalid=2734, Unknown=0, NotChecked=0, Total=3080 [2019-12-07 13:22:17,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2019-12-07 13:22:17,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 62. [2019-12-07 13:22:17,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-12-07 13:22:17,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 66 transitions. [2019-12-07 13:22:17,871 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 66 transitions. Word has length 39 [2019-12-07 13:22:17,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:22:17,871 INFO L462 AbstractCegarLoop]: Abstraction has 62 states and 66 transitions. [2019-12-07 13:22:17,871 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-12-07 13:22:17,871 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 66 transitions. [2019-12-07 13:22:17,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-12-07 13:22:17,871 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:22:17,871 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:22:18,072 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:22:18,073 INFO L410 AbstractCegarLoop]: === Iteration 23 === [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]=== [2019-12-07 13:22:18,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:22:18,074 INFO L82 PathProgramCache]: Analyzing trace with hash -2015293125, now seen corresponding path program 3 times [2019-12-07 13:22:18,074 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:22:18,074 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979995090] [2019-12-07 13:22:18,075 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:22:18,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:22:18,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:22:18,189 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-12-07 13:22:18,190 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979995090] [2019-12-07 13:22:18,190 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748148402] [2019-12-07 13:22:18,190 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6ee30319-8eb7-4e19-9c50-0c0e1826f677/bin/uautomizer/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:22:18,255 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-07 13:22:18,255 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 13:22:18,256 INFO L264 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 19 conjunts are in the unsatisfiable core [2019-12-07 13:22:18,258 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:22:18,353 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-12-07 13:22:18,353 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 13:22:18,353 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 20 [2019-12-07 13:22:18,353 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257458208] [2019-12-07 13:22:18,353 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-12-07 13:22:18,353 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:22:18,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-12-07 13:22:18,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2019-12-07 13:22:18,354 INFO L87 Difference]: Start difference. First operand 62 states and 66 transitions. Second operand 21 states. [2019-12-07 13:22:18,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:22:18,591 INFO L93 Difference]: Finished difference Result 75 states and 80 transitions. [2019-12-07 13:22:18,591 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-07 13:22:18,591 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 47 [2019-12-07 13:22:18,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:22:18,591 INFO L225 Difference]: With dead ends: 75 [2019-12-07 13:22:18,591 INFO L226 Difference]: Without dead ends: 75 [2019-12-07 13:22:18,592 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=114, Invalid=588, Unknown=0, NotChecked=0, Total=702 [2019-12-07 13:22:18,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2019-12-07 13:22:18,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 71. [2019-12-07 13:22:18,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2019-12-07 13:22:18,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 78 transitions. [2019-12-07 13:22:18,593 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 78 transitions. Word has length 47 [2019-12-07 13:22:18,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:22:18,594 INFO L462 AbstractCegarLoop]: Abstraction has 71 states and 78 transitions. [2019-12-07 13:22:18,594 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-12-07 13:22:18,594 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 78 transitions. [2019-12-07 13:22:18,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-12-07 13:22:18,594 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:22:18,594 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:22:18,795 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:22:18,795 INFO L410 AbstractCegarLoop]: === Iteration 24 === [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]=== [2019-12-07 13:22:18,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:22:18,796 INFO L82 PathProgramCache]: Analyzing trace with hash -1575388287, now seen corresponding path program 2 times [2019-12-07 13:22:18,797 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:22:18,797 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381058526] [2019-12-07 13:22:18,797 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:22:18,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:22:18,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:22:18,924 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 3 proven. 20 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-12-07 13:22:18,924 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381058526] [2019-12-07 13:22:18,925 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025786837] [2019-12-07 13:22:18,925 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6ee30319-8eb7-4e19-9c50-0c0e1826f677/bin/uautomizer/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:22:19,000 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-07 13:22:19,000 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 13:22:19,001 INFO L264 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 25 conjunts are in the unsatisfiable core [2019-12-07 13:22:19,003 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:22:19,087 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-12-07 13:22:19,088 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 13:22:19,088 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2019-12-07 13:22:19,088 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591888523] [2019-12-07 13:22:19,089 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-12-07 13:22:19,089 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:22:19,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-12-07 13:22:19,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2019-12-07 13:22:19,089 INFO L87 Difference]: Start difference. First operand 71 states and 78 transitions. Second operand 19 states. [2019-12-07 13:22:19,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:22:19,362 INFO L93 Difference]: Finished difference Result 73 states and 78 transitions. [2019-12-07 13:22:19,363 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-07 13:22:19,363 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 51 [2019-12-07 13:22:19,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:22:19,363 INFO L225 Difference]: With dead ends: 73 [2019-12-07 13:22:19,363 INFO L226 Difference]: Without dead ends: 69 [2019-12-07 13:22:19,364 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2019-12-07 13:22:19,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2019-12-07 13:22:19,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2019-12-07 13:22:19,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2019-12-07 13:22:19,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 73 transitions. [2019-12-07 13:22:19,365 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 73 transitions. Word has length 51 [2019-12-07 13:22:19,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:22:19,365 INFO L462 AbstractCegarLoop]: Abstraction has 69 states and 73 transitions. [2019-12-07 13:22:19,365 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-12-07 13:22:19,366 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 73 transitions. [2019-12-07 13:22:19,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2019-12-07 13:22:19,366 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:22:19,366 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:22:19,566 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:22:19,567 INFO L410 AbstractCegarLoop]: === Iteration 25 === [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]=== [2019-12-07 13:22:19,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:22:19,567 INFO L82 PathProgramCache]: Analyzing trace with hash -1284852124, now seen corresponding path program 4 times [2019-12-07 13:22:19,567 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:22:19,567 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739628978] [2019-12-07 13:22:19,568 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:22:19,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:22:19,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:22:19,745 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-12-07 13:22:19,745 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739628978] [2019-12-07 13:22:19,745 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011901928] [2019-12-07 13:22:19,745 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6ee30319-8eb7-4e19-9c50-0c0e1826f677/bin/uautomizer/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:22:19,808 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-07 13:22:19,808 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 13:22:19,809 INFO L264 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 34 conjunts are in the unsatisfiable core [2019-12-07 13:22:19,812 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:22:19,823 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:22:19,823 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 [2019-12-07 13:22:19,823 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 13:22:19,834 INFO L614 ElimStorePlain]: treesize reduction 10, result has 64.3 percent of original size [2019-12-07 13:22:19,834 INFO L534 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-12-07 13:22:19,834 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:13, output treesize:9 [2019-12-07 13:22:19,916 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 15 treesize of output 11 [2019-12-07 13:22:19,917 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 13:22:19,919 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:22:19,919 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 13:22:19,920 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:17 [2019-12-07 13:22:20,179 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2019-12-07 13:22:20,179 INFO L534 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-12-07 13:22:20,188 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:22:20,190 INFO L172 IndexEqualityManager]: detected equality via solver [2019-12-07 13:22:20,200 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:22:20,200 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 43 [2019-12-07 13:22:20,200 INFO L534 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-12-07 13:22:20,218 INFO L614 ElimStorePlain]: treesize reduction 17, result has 62.2 percent of original size [2019-12-07 13:22:20,219 INFO L534 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 13:22:20,219 INFO L239 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:49, output treesize:8 [2019-12-07 13:22:20,239 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 13:22:20,246 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 20 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-12-07 13:22:20,246 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 13:22:20,247 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 19] total 31 [2019-12-07 13:22:20,247 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982810405] [2019-12-07 13:22:20,247 INFO L442 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-12-07 13:22:20,247 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:22:20,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-12-07 13:22:20,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=841, Unknown=0, NotChecked=0, Total=930 [2019-12-07 13:22:20,248 INFO L87 Difference]: Start difference. First operand 69 states and 73 transitions. Second operand 31 states. [2019-12-07 13:22:23,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:22:23,261 INFO L93 Difference]: Finished difference Result 167 states and 172 transitions. [2019-12-07 13:22:23,262 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2019-12-07 13:22:23,262 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 54 [2019-12-07 13:22:23,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:22:23,263 INFO L225 Difference]: With dead ends: 167 [2019-12-07 13:22:23,263 INFO L226 Difference]: Without dead ends: 83 [2019-12-07 13:22:23,265 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1042 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=522, Invalid=4308, Unknown=0, NotChecked=0, Total=4830 [2019-12-07 13:22:23,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2019-12-07 13:22:23,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 77. [2019-12-07 13:22:23,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2019-12-07 13:22:23,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 81 transitions. [2019-12-07 13:22:23,268 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 81 transitions. Word has length 54 [2019-12-07 13:22:23,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:22:23,268 INFO L462 AbstractCegarLoop]: Abstraction has 77 states and 81 transitions. [2019-12-07 13:22:23,268 INFO L463 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-12-07 13:22:23,268 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 81 transitions. [2019-12-07 13:22:23,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2019-12-07 13:22:23,269 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:22:23,269 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:22:23,470 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:22:23,471 INFO L410 AbstractCegarLoop]: === Iteration 26 === [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]=== [2019-12-07 13:22:23,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:22:23,471 INFO L82 PathProgramCache]: Analyzing trace with hash -1240638882, now seen corresponding path program 5 times [2019-12-07 13:22:23,472 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:22:23,472 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363437252] [2019-12-07 13:22:23,472 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:22:23,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:22:23,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:22:23,591 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 8 proven. 31 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-12-07 13:22:23,591 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363437252] [2019-12-07 13:22:23,591 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627647500] [2019-12-07 13:22:23,591 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6ee30319-8eb7-4e19-9c50-0c0e1826f677/bin/uautomizer/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:22:23,662 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-07 13:22:23,662 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 13:22:23,663 INFO L264 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 34 conjunts are in the unsatisfiable core [2019-12-07 13:22:23,665 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:22:23,668 INFO L430 ElimStorePlain]: Different costs {0=[|v_#length_27|], 1=[|v_#valid_34|]} [2019-12-07 13:22:23,671 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-12-07 13:22:23,671 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 [2019-12-07 13:22:23,672 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 13:22:23,678 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:22:23,681 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 [2019-12-07 13:22:23,681 INFO L534 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-12-07 13:22:23,686 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:22:23,686 INFO L534 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-12-07 13:22:23,687 INFO L239 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:24, output treesize:12 [2019-12-07 13:22:23,774 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-12-07 13:22:23,774 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 13:22:23,774 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 19 [2019-12-07 13:22:23,774 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904137105] [2019-12-07 13:22:23,774 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-12-07 13:22:23,774 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:22:23,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-12-07 13:22:23,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2019-12-07 13:22:23,775 INFO L87 Difference]: Start difference. First operand 77 states and 81 transitions. Second operand 20 states. [2019-12-07 13:22:24,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:22:24,084 INFO L93 Difference]: Finished difference Result 90 states and 95 transitions. [2019-12-07 13:22:24,084 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-07 13:22:24,084 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 62 [2019-12-07 13:22:24,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:22:24,085 INFO L225 Difference]: With dead ends: 90 [2019-12-07 13:22:24,085 INFO L226 Difference]: Without dead ends: 90 [2019-12-07 13:22:24,085 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2019-12-07 13:22:24,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2019-12-07 13:22:24,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 86. [2019-12-07 13:22:24,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2019-12-07 13:22:24,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 93 transitions. [2019-12-07 13:22:24,087 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 93 transitions. Word has length 62 [2019-12-07 13:22:24,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:22:24,087 INFO L462 AbstractCegarLoop]: Abstraction has 86 states and 93 transitions. [2019-12-07 13:22:24,087 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-12-07 13:22:24,087 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 93 transitions. [2019-12-07 13:22:24,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2019-12-07 13:22:24,087 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:22:24,087 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:22:24,288 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:22:24,289 INFO L410 AbstractCegarLoop]: === Iteration 27 === [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]=== [2019-12-07 13:22:24,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:22:24,289 INFO L82 PathProgramCache]: Analyzing trace with hash -521766108, now seen corresponding path program 3 times [2019-12-07 13:22:24,290 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:22:24,290 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215589996] [2019-12-07 13:22:24,290 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:22:24,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:22:24,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:22:24,454 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 8 proven. 43 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-12-07 13:22:24,455 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215589996] [2019-12-07 13:22:24,455 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733713940] [2019-12-07 13:22:24,455 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6ee30319-8eb7-4e19-9c50-0c0e1826f677/bin/uautomizer/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:22:24,536 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-07 13:22:24,536 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 13:22:24,537 INFO L264 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 27 conjunts are in the unsatisfiable core [2019-12-07 13:22:24,539 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:22:24,548 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:22:24,548 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 [2019-12-07 13:22:24,548 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 13:22:24,558 INFO L614 ElimStorePlain]: treesize reduction 10, result has 64.3 percent of original size [2019-12-07 13:22:24,559 INFO L534 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-12-07 13:22:24,559 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:13, output treesize:9 [2019-12-07 13:22:24,703 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 6 proven. 45 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-12-07 13:22:24,704 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 13:22:24,704 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 24 [2019-12-07 13:22:24,704 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468637988] [2019-12-07 13:22:24,704 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-12-07 13:22:24,704 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:22:24,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-12-07 13:22:24,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2019-12-07 13:22:24,705 INFO L87 Difference]: Start difference. First operand 86 states and 93 transitions. Second operand 25 states. [2019-12-07 13:22:25,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:22:25,071 INFO L93 Difference]: Finished difference Result 88 states and 93 transitions. [2019-12-07 13:22:25,071 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-12-07 13:22:25,072 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 66 [2019-12-07 13:22:25,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:22:25,072 INFO L225 Difference]: With dead ends: 88 [2019-12-07 13:22:25,072 INFO L226 Difference]: Without dead ends: 84 [2019-12-07 13:22:25,073 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=141, Invalid=789, Unknown=0, NotChecked=0, Total=930 [2019-12-07 13:22:25,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2019-12-07 13:22:25,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2019-12-07 13:22:25,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2019-12-07 13:22:25,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 88 transitions. [2019-12-07 13:22:25,074 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 88 transitions. Word has length 66 [2019-12-07 13:22:25,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:22:25,074 INFO L462 AbstractCegarLoop]: Abstraction has 84 states and 88 transitions. [2019-12-07 13:22:25,074 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-12-07 13:22:25,074 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 88 transitions. [2019-12-07 13:22:25,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2019-12-07 13:22:25,075 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:22:25,075 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:22:25,275 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:22:25,277 INFO L410 AbstractCegarLoop]: === Iteration 28 === [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]=== [2019-12-07 13:22:25,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:22:25,277 INFO L82 PathProgramCache]: Analyzing trace with hash -447516703, now seen corresponding path program 6 times [2019-12-07 13:22:25,278 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:22:25,278 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010054963] [2019-12-07 13:22:25,278 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:22:25,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:22:25,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:22:25,497 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 16 proven. 45 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-12-07 13:22:25,497 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010054963] [2019-12-07 13:22:25,497 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671864843] [2019-12-07 13:22:25,497 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6ee30319-8eb7-4e19-9c50-0c0e1826f677/bin/uautomizer/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:22:25,587 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2019-12-07 13:22:25,588 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 13:22:25,589 INFO L264 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 53 conjunts are in the unsatisfiable core [2019-12-07 13:22:25,591 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:22:25,594 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 [2019-12-07 13:22:25,595 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 13:22:25,597 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:22:25,598 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-12-07 13:22:25,598 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:12, output treesize:8 [2019-12-07 13:22:25,702 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2019-12-07 13:22:25,703 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 13:22:25,707 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:22:25,708 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-12-07 13:22:25,708 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:21 [2019-12-07 13:22:25,737 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2019-12-07 13:22:25,737 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 13:22:25,743 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:22:25,744 INFO L534 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-12-07 13:22:25,744 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:35, output treesize:31 [2019-12-07 13:22:29,413 WARN L192 SmtUtils]: Spent 613.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2019-12-07 13:22:33,481 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 27 proven. 24 refuted. 10 times theorem prover too weak. 15 trivial. 0 not checked. [2019-12-07 13:22:33,482 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 13:22:33,482 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 23] total 38 [2019-12-07 13:22:33,482 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292590511] [2019-12-07 13:22:33,482 INFO L442 AbstractCegarLoop]: Interpolant automaton has 38 states [2019-12-07 13:22:33,482 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:22:33,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2019-12-07 13:22:33,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1286, Unknown=12, NotChecked=0, Total=1406 [2019-12-07 13:22:33,483 INFO L87 Difference]: Start difference. First operand 84 states and 88 transitions. Second operand 38 states. [2019-12-07 13:22:42,045 WARN L192 SmtUtils]: Spent 8.04 s on a formula simplification. DAG size of input: 56 DAG size of output: 41 [2019-12-07 13:22:50,266 WARN L192 SmtUtils]: Spent 8.05 s on a formula simplification. DAG size of input: 63 DAG size of output: 38 [2019-12-07 13:22:58,369 WARN L192 SmtUtils]: Spent 8.04 s on a formula simplification. DAG size of input: 66 DAG size of output: 45 [2019-12-07 13:23:01,585 WARN L192 SmtUtils]: Spent 3.15 s on a formula simplification. DAG size of input: 73 DAG size of output: 48 [2019-12-07 13:23:09,704 WARN L192 SmtUtils]: Spent 8.06 s on a formula simplification. DAG size of input: 68 DAG size of output: 48 [2019-12-07 13:23:17,827 WARN L192 SmtUtils]: Spent 8.04 s on a formula simplification. DAG size of input: 63 DAG size of output: 47 [2019-12-07 13:23:21,935 WARN L192 SmtUtils]: Spent 4.03 s on a formula simplification. DAG size of input: 72 DAG size of output: 42 [2019-12-07 13:23:26,045 WARN L192 SmtUtils]: Spent 4.04 s on a formula simplification. DAG size of input: 75 DAG size of output: 45 [2019-12-07 13:23:30,893 WARN L192 SmtUtils]: Spent 4.79 s on a formula simplification. DAG size of input: 85 DAG size of output: 52 [2019-12-07 13:23:36,008 WARN L192 SmtUtils]: Spent 5.06 s on a formula simplification. DAG size of input: 77 DAG size of output: 56 [2019-12-07 13:23:40,823 WARN L192 SmtUtils]: Spent 4.36 s on a formula simplification. DAG size of input: 69 DAG size of output: 54 [2019-12-07 13:23:45,316 WARN L192 SmtUtils]: Spent 4.43 s on a formula simplification. DAG size of input: 69 DAG size of output: 54 [2019-12-07 13:23:49,977 WARN L192 SmtUtils]: Spent 4.59 s on a formula simplification. DAG size of input: 72 DAG size of output: 57 [2019-12-07 13:23:54,184 WARN L192 SmtUtils]: Spent 4.14 s on a formula simplification. DAG size of input: 79 DAG size of output: 60 [2019-12-07 13:23:54,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:23:54,313 INFO L93 Difference]: Finished difference Result 133 states and 138 transitions. [2019-12-07 13:23:54,313 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-12-07 13:23:54,313 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 69 [2019-12-07 13:23:54,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:23:54,314 INFO L225 Difference]: With dead ends: 133 [2019-12-07 13:23:54,314 INFO L226 Difference]: Without dead ends: 91 [2019-12-07 13:23:54,315 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 538 ImplicationChecksByTransitivity, 87.9s TimeCoverageRelationStatistics Valid=361, Invalid=3287, Unknown=12, NotChecked=0, Total=3660 [2019-12-07 13:23:54,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2019-12-07 13:23:54,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 88. [2019-12-07 13:23:54,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2019-12-07 13:23:54,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 92 transitions. [2019-12-07 13:23:54,317 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 92 transitions. Word has length 69 [2019-12-07 13:23:54,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:23:54,317 INFO L462 AbstractCegarLoop]: Abstraction has 88 states and 92 transitions. [2019-12-07 13:23:54,317 INFO L463 AbstractCegarLoop]: Interpolant automaton has 38 states. [2019-12-07 13:23:54,317 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 92 transitions. [2019-12-07 13:23:54,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2019-12-07 13:23:54,317 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:23:54,317 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:23:54,518 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:23:54,518 INFO L410 AbstractCegarLoop]: === Iteration 29 === [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]=== [2019-12-07 13:23:54,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:23:54,519 INFO L82 PathProgramCache]: Analyzing trace with hash 831442788, now seen corresponding path program 7 times [2019-12-07 13:23:54,519 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:23:54,519 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105053375] [2019-12-07 13:23:54,520 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:23:54,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:23:54,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:23:54,673 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 17 proven. 57 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-12-07 13:23:54,673 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105053375] [2019-12-07 13:23:54,674 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052362347] [2019-12-07 13:23:54,674 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6ee30319-8eb7-4e19-9c50-0c0e1826f677/bin/uautomizer/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:23:54,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:23:54,742 INFO L264 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 32 conjunts are in the unsatisfiable core [2019-12-07 13:23:54,743 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:23:54,852 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 15 proven. 59 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-12-07 13:23:54,852 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 13:23:54,852 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 24 [2019-12-07 13:23:54,853 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328336951] [2019-12-07 13:23:54,853 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-12-07 13:23:54,853 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:23:54,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-12-07 13:23:54,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2019-12-07 13:23:54,853 INFO L87 Difference]: Start difference. First operand 88 states and 92 transitions. Second operand 25 states. [2019-12-07 13:23:55,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:23:55,285 INFO L93 Difference]: Finished difference Result 101 states and 106 transitions. [2019-12-07 13:23:55,285 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-07 13:23:55,285 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 73 [2019-12-07 13:23:55,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:23:55,286 INFO L225 Difference]: With dead ends: 101 [2019-12-07 13:23:55,286 INFO L226 Difference]: Without dead ends: 101 [2019-12-07 13:23:55,286 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=152, Invalid=904, Unknown=0, NotChecked=0, Total=1056 [2019-12-07 13:23:55,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2019-12-07 13:23:55,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 97. [2019-12-07 13:23:55,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2019-12-07 13:23:55,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 104 transitions. [2019-12-07 13:23:55,288 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 104 transitions. Word has length 73 [2019-12-07 13:23:55,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:23:55,288 INFO L462 AbstractCegarLoop]: Abstraction has 97 states and 104 transitions. [2019-12-07 13:23:55,288 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-12-07 13:23:55,288 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 104 transitions. [2019-12-07 13:23:55,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2019-12-07 13:23:55,289 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:23:55,289 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:23:55,489 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:23:55,490 INFO L410 AbstractCegarLoop]: === Iteration 30 === [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]=== [2019-12-07 13:23:55,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:23:55,490 INFO L82 PathProgramCache]: Analyzing trace with hash 620363050, now seen corresponding path program 4 times [2019-12-07 13:23:55,490 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:23:55,491 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463502128] [2019-12-07 13:23:55,491 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:23:55,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:23:56,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:23:56,057 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 20 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:23:56,058 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463502128] [2019-12-07 13:23:56,058 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242892804] [2019-12-07 13:23:56,058 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6ee30319-8eb7-4e19-9c50-0c0e1826f677/bin/uautomizer/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:23:56,128 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-07 13:23:56,128 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 13:23:56,129 INFO L264 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 38 conjunts are in the unsatisfiable core [2019-12-07 13:23:56,130 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:23:56,141 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:23:56,141 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 [2019-12-07 13:23:56,141 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 13:23:56,151 INFO L614 ElimStorePlain]: treesize reduction 10, result has 64.3 percent of original size [2019-12-07 13:23:56,152 INFO L534 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-12-07 13:23:56,152 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:13, output treesize:9 [2019-12-07 13:23:56,290 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 15 treesize of output 11 [2019-12-07 13:23:56,290 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 13:23:56,293 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:23:56,293 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 13:23:56,293 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:17 [2019-12-07 13:23:56,648 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 24 treesize of output 18 [2019-12-07 13:23:56,648 INFO L534 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-12-07 13:23:56,657 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:23:56,660 INFO L172 IndexEqualityManager]: detected equality via solver [2019-12-07 13:23:56,669 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:23:56,669 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 43 [2019-12-07 13:23:56,670 INFO L534 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-12-07 13:23:56,688 INFO L614 ElimStorePlain]: treesize reduction 17, result has 62.2 percent of original size [2019-12-07 13:23:56,689 INFO L534 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 13:23:56,689 INFO L239 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:49, output treesize:8 [2019-12-07 13:23:56,715 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 13:23:56,729 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 56 proven. 21 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-12-07 13:23:56,730 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 13:23:56,730 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 21] total 44 [2019-12-07 13:23:56,730 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609430205] [2019-12-07 13:23:56,730 INFO L442 AbstractCegarLoop]: Interpolant automaton has 44 states [2019-12-07 13:23:56,730 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:23:56,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2019-12-07 13:23:56,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=1744, Unknown=0, NotChecked=0, Total=1892 [2019-12-07 13:23:56,731 INFO L87 Difference]: Start difference. First operand 97 states and 104 transitions. Second operand 44 states. [2019-12-07 13:23:58,311 WARN L192 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 38 [2019-12-07 13:23:58,628 WARN L192 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 33 [2019-12-07 13:24:00,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:24:00,888 INFO L93 Difference]: Finished difference Result 139 states and 146 transitions. [2019-12-07 13:24:00,888 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-12-07 13:24:00,889 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 77 [2019-12-07 13:24:00,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:24:00,889 INFO L225 Difference]: With dead ends: 139 [2019-12-07 13:24:00,889 INFO L226 Difference]: Without dead ends: 107 [2019-12-07 13:24:00,891 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 61 SyntacticMatches, 2 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1211 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=481, Invalid=4631, Unknown=0, NotChecked=0, Total=5112 [2019-12-07 13:24:00,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2019-12-07 13:24:00,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 101. [2019-12-07 13:24:00,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2019-12-07 13:24:00,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 108 transitions. [2019-12-07 13:24:00,893 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 108 transitions. Word has length 77 [2019-12-07 13:24:00,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:24:00,893 INFO L462 AbstractCegarLoop]: Abstraction has 101 states and 108 transitions. [2019-12-07 13:24:00,893 INFO L463 AbstractCegarLoop]: Interpolant automaton has 44 states. [2019-12-07 13:24:00,893 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 108 transitions. [2019-12-07 13:24:00,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2019-12-07 13:24:00,893 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:24:00,893 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:24:01,094 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:24:01,094 INFO L410 AbstractCegarLoop]: === Iteration 31 === [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]=== [2019-12-07 13:24:01,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:24:01,095 INFO L82 PathProgramCache]: Analyzing trace with hash 1398508781, now seen corresponding path program 5 times [2019-12-07 13:24:01,096 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:24:01,096 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727037662] [2019-12-07 13:24:01,096 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:24:01,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:24:01,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:24:01,287 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 17 proven. 73 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-12-07 13:24:01,287 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727037662] [2019-12-07 13:24:01,287 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247601387] [2019-12-07 13:24:01,287 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6ee30319-8eb7-4e19-9c50-0c0e1826f677/bin/uautomizer/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:24:01,386 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2019-12-07 13:24:01,386 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 13:24:01,388 INFO L264 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 37 conjunts are in the unsatisfiable core [2019-12-07 13:24:01,390 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:24:01,403 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:24:01,403 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 [2019-12-07 13:24:01,403 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 13:24:01,416 INFO L614 ElimStorePlain]: treesize reduction 10, result has 64.3 percent of original size [2019-12-07 13:24:01,417 INFO L534 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-12-07 13:24:01,417 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:13, output treesize:9 [2019-12-07 13:24:01,558 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 6 proven. 84 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-12-07 13:24:01,558 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 13:24:01,559 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 22 [2019-12-07 13:24:01,559 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419173137] [2019-12-07 13:24:01,559 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-12-07 13:24:01,559 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:24:01,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-12-07 13:24:01,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2019-12-07 13:24:01,560 INFO L87 Difference]: Start difference. First operand 101 states and 108 transitions. Second operand 23 states. [2019-12-07 13:24:01,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:24:01,965 INFO L93 Difference]: Finished difference Result 103 states and 108 transitions. [2019-12-07 13:24:01,965 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-07 13:24:01,965 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 81 [2019-12-07 13:24:01,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:24:01,966 INFO L225 Difference]: With dead ends: 103 [2019-12-07 13:24:01,966 INFO L226 Difference]: Without dead ends: 99 [2019-12-07 13:24:01,966 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 73 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=118, Invalid=752, Unknown=0, NotChecked=0, Total=870 [2019-12-07 13:24:01,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2019-12-07 13:24:01,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2019-12-07 13:24:01,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2019-12-07 13:24:01,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 103 transitions. [2019-12-07 13:24:01,968 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 103 transitions. Word has length 81 [2019-12-07 13:24:01,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:24:01,968 INFO L462 AbstractCegarLoop]: Abstraction has 99 states and 103 transitions. [2019-12-07 13:24:01,968 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-12-07 13:24:01,968 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 103 transitions. [2019-12-07 13:24:01,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2019-12-07 13:24:01,969 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:24:01,969 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:24:02,169 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:24:02,170 INFO L410 AbstractCegarLoop]: === Iteration 32 === [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]=== [2019-12-07 13:24:02,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:24:02,170 INFO L82 PathProgramCache]: Analyzing trace with hash 1792286072, now seen corresponding path program 8 times [2019-12-07 13:24:02,171 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:24:02,171 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065974606] [2019-12-07 13:24:02,171 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:24:02,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:24:02,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:24:02,519 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 21 proven. 82 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-12-07 13:24:02,519 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065974606] [2019-12-07 13:24:02,519 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773606701] [2019-12-07 13:24:02,519 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6ee30319-8eb7-4e19-9c50-0c0e1826f677/bin/uautomizer/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:24:02,589 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-07 13:24:02,589 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 13:24:02,590 INFO L264 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 48 conjunts are in the unsatisfiable core [2019-12-07 13:24:02,592 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:24:02,709 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 14 treesize of output 10 [2019-12-07 13:24:02,709 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 13:24:02,713 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:24:02,713 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-12-07 13:24:02,713 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:17 [2019-12-07 13:24:03,238 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:24:03,238 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 52 [2019-12-07 13:24:03,239 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 13:24:03,256 INFO L614 ElimStorePlain]: treesize reduction 26, result has 46.9 percent of original size [2019-12-07 13:24:03,257 INFO L534 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 13:24:03,257 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:39, output treesize:8 [2019-12-07 13:24:03,287 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 13:24:03,302 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 5 proven. 98 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-12-07 13:24:03,302 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 13:24:03,302 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 22] total 38 [2019-12-07 13:24:03,302 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310520928] [2019-12-07 13:24:03,302 INFO L442 AbstractCegarLoop]: Interpolant automaton has 38 states [2019-12-07 13:24:03,302 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:24:03,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2019-12-07 13:24:03,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=1326, Unknown=0, NotChecked=0, Total=1406 [2019-12-07 13:24:03,303 INFO L87 Difference]: Start difference. First operand 99 states and 103 transitions. Second operand 38 states. [2019-12-07 13:24:07,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:24:07,404 INFO L93 Difference]: Finished difference Result 247 states and 252 transitions. [2019-12-07 13:24:07,404 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2019-12-07 13:24:07,404 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 84 [2019-12-07 13:24:07,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:24:07,405 INFO L225 Difference]: With dead ends: 247 [2019-12-07 13:24:07,405 INFO L226 Difference]: Without dead ends: 113 [2019-12-07 13:24:07,406 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 68 SyntacticMatches, 2 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1083 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=453, Invalid=6027, Unknown=0, NotChecked=0, Total=6480 [2019-12-07 13:24:07,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2019-12-07 13:24:07,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 107. [2019-12-07 13:24:07,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2019-12-07 13:24:07,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 111 transitions. [2019-12-07 13:24:07,408 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 111 transitions. Word has length 84 [2019-12-07 13:24:07,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:24:07,408 INFO L462 AbstractCegarLoop]: Abstraction has 107 states and 111 transitions. [2019-12-07 13:24:07,408 INFO L463 AbstractCegarLoop]: Interpolant automaton has 38 states. [2019-12-07 13:24:07,408 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 111 transitions. [2019-12-07 13:24:07,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2019-12-07 13:24:07,409 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:24:07,409 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:24:07,609 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:24:07,610 INFO L410 AbstractCegarLoop]: === Iteration 33 === [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]=== [2019-12-07 13:24:07,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:24:07,610 INFO L82 PathProgramCache]: Analyzing trace with hash -1741959182, now seen corresponding path program 9 times [2019-12-07 13:24:07,611 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:24:07,611 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058608247] [2019-12-07 13:24:07,611 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:24:07,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:24:07,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:24:07,797 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 30 proven. 90 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2019-12-07 13:24:07,797 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058608247] [2019-12-07 13:24:07,797 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141585070] [2019-12-07 13:24:07,797 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6ee30319-8eb7-4e19-9c50-0c0e1826f677/bin/uautomizer/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:24:07,977 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-12-07 13:24:07,978 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 13:24:07,979 INFO L264 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 53 conjunts are in the unsatisfiable core [2019-12-07 13:24:07,981 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:24:07,983 INFO L430 ElimStorePlain]: Different costs {0=[|v_#length_31|], 1=[|v_#valid_36|]} [2019-12-07 13:24:07,989 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-12-07 13:24:07,990 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 [2019-12-07 13:24:07,990 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 13:24:07,996 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:24:07,999 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 [2019-12-07 13:24:07,999 INFO L534 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-12-07 13:24:08,004 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:24:08,004 INFO L534 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-12-07 13:24:08,004 INFO L239 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:24, output treesize:12 [2019-12-07 13:24:08,336 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 28 proven. 136 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 13:24:08,336 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 13:24:08,336 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 19] total 34 [2019-12-07 13:24:08,336 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649809796] [2019-12-07 13:24:08,336 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-12-07 13:24:08,336 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:24:08,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-12-07 13:24:08,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=1050, Unknown=0, NotChecked=0, Total=1190 [2019-12-07 13:24:08,337 INFO L87 Difference]: Start difference. First operand 107 states and 111 transitions. Second operand 35 states. [2019-12-07 13:24:09,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:24:09,580 INFO L93 Difference]: Finished difference Result 120 states and 125 transitions. [2019-12-07 13:24:09,581 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-12-07 13:24:09,581 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 92 [2019-12-07 13:24:09,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:24:09,583 INFO L225 Difference]: With dead ends: 120 [2019-12-07 13:24:09,584 INFO L226 Difference]: Without dead ends: 120 [2019-12-07 13:24:09,586 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 427 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=295, Invalid=1867, Unknown=0, NotChecked=0, Total=2162 [2019-12-07 13:24:09,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2019-12-07 13:24:09,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 116. [2019-12-07 13:24:09,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2019-12-07 13:24:09,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 123 transitions. [2019-12-07 13:24:09,592 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 123 transitions. Word has length 92 [2019-12-07 13:24:09,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:24:09,593 INFO L462 AbstractCegarLoop]: Abstraction has 116 states and 123 transitions. [2019-12-07 13:24:09,593 INFO L463 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-12-07 13:24:09,593 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 123 transitions. [2019-12-07 13:24:09,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2019-12-07 13:24:09,594 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:24:09,595 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:24:09,795 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:24:09,796 INFO L410 AbstractCegarLoop]: === Iteration 34 === [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]=== [2019-12-07 13:24:09,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:24:09,796 INFO L82 PathProgramCache]: Analyzing trace with hash -51902792, now seen corresponding path program 6 times [2019-12-07 13:24:09,797 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:24:09,797 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140708969] [2019-12-07 13:24:09,797 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:24:09,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:24:09,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:24:09,983 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 30 proven. 110 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2019-12-07 13:24:09,983 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140708969] [2019-12-07 13:24:09,983 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932527682] [2019-12-07 13:24:09,983 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6ee30319-8eb7-4e19-9c50-0c0e1826f677/bin/uautomizer/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:24:10,133 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2019-12-07 13:24:10,133 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 13:24:10,135 INFO L264 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 35 conjunts are in the unsatisfiable core [2019-12-07 13:24:10,136 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:24:10,146 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:24:10,146 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 [2019-12-07 13:24:10,146 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 13:24:10,156 INFO L614 ElimStorePlain]: treesize reduction 10, result has 64.3 percent of original size [2019-12-07 13:24:10,157 INFO L534 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-12-07 13:24:10,157 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:13, output treesize:9 [2019-12-07 13:24:10,405 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 28 proven. 112 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2019-12-07 13:24:10,405 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 13:24:10,405 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2019-12-07 13:24:10,406 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449812452] [2019-12-07 13:24:10,406 INFO L442 AbstractCegarLoop]: Interpolant automaton has 33 states [2019-12-07 13:24:10,406 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:24:10,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2019-12-07 13:24:10,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=919, Unknown=0, NotChecked=0, Total=1056 [2019-12-07 13:24:10,406 INFO L87 Difference]: Start difference. First operand 116 states and 123 transitions. Second operand 33 states. [2019-12-07 13:24:11,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:24:11,086 INFO L93 Difference]: Finished difference Result 118 states and 123 transitions. [2019-12-07 13:24:11,087 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-07 13:24:11,087 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 96 [2019-12-07 13:24:11,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:24:11,087 INFO L225 Difference]: With dead ends: 118 [2019-12-07 13:24:11,087 INFO L226 Difference]: Without dead ends: 114 [2019-12-07 13:24:11,088 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 427 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=226, Invalid=1414, Unknown=0, NotChecked=0, Total=1640 [2019-12-07 13:24:11,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2019-12-07 13:24:11,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2019-12-07 13:24:11,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2019-12-07 13:24:11,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 118 transitions. [2019-12-07 13:24:11,090 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 118 transitions. Word has length 96 [2019-12-07 13:24:11,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:24:11,090 INFO L462 AbstractCegarLoop]: Abstraction has 114 states and 118 transitions. [2019-12-07 13:24:11,090 INFO L463 AbstractCegarLoop]: Interpolant automaton has 33 states. [2019-12-07 13:24:11,090 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 118 transitions. [2019-12-07 13:24:11,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2019-12-07 13:24:11,091 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:24:11,091 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:24:11,291 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:24:11,292 INFO L410 AbstractCegarLoop]: === Iteration 35 === [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]=== [2019-12-07 13:24:11,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:24:11,292 INFO L82 PathProgramCache]: Analyzing trace with hash -47887411, now seen corresponding path program 10 times [2019-12-07 13:24:11,293 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:24:11,293 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686106149] [2019-12-07 13:24:11,293 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:24:11,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:24:11,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:24:11,683 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 26 proven. 130 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2019-12-07 13:24:11,683 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686106149] [2019-12-07 13:24:11,683 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272084071] [2019-12-07 13:24:11,683 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6ee30319-8eb7-4e19-9c50-0c0e1826f677/bin/uautomizer/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:24:11,764 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-07 13:24:11,764 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 13:24:11,765 INFO L264 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 45 conjunts are in the unsatisfiable core [2019-12-07 13:24:11,767 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:24:11,770 INFO L430 ElimStorePlain]: Different costs {0=[|v_#length_33|], 1=[|v_#valid_37|]} [2019-12-07 13:24:11,772 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-12-07 13:24:11,773 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 [2019-12-07 13:24:11,773 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 13:24:11,779 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:24:11,782 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 [2019-12-07 13:24:11,782 INFO L534 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-12-07 13:24:11,787 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:24:11,787 INFO L534 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-12-07 13:24:11,787 INFO L239 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:24, output treesize:21 [2019-12-07 13:24:11,974 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2019-12-07 13:24:11,975 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 13:24:11,980 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:24:11,980 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 13:24:11,981 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:26 [2019-12-07 13:24:12,018 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2019-12-07 13:24:12,018 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 13:24:12,024 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:24:12,024 INFO L534 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-12-07 13:24:12,025 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:37, output treesize:33 [2019-12-07 13:24:12,639 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2019-12-07 13:24:12,639 INFO L534 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-12-07 13:24:12,648 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:24:12,650 INFO L172 IndexEqualityManager]: detected equality via solver [2019-12-07 13:24:12,651 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 10 [2019-12-07 13:24:12,651 INFO L534 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-12-07 13:24:12,656 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:24:12,656 INFO L534 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 13:24:12,656 INFO L239 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:50, output treesize:3 [2019-12-07 13:24:12,701 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 101 proven. 55 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2019-12-07 13:24:12,701 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 13:24:12,701 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 38 [2019-12-07 13:24:12,702 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73821426] [2019-12-07 13:24:12,702 INFO L442 AbstractCegarLoop]: Interpolant automaton has 38 states [2019-12-07 13:24:12,702 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:24:12,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2019-12-07 13:24:12,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1296, Unknown=0, NotChecked=0, Total=1406 [2019-12-07 13:24:12,703 INFO L87 Difference]: Start difference. First operand 114 states and 118 transitions. Second operand 38 states. [2019-12-07 13:24:16,223 WARN L192 SmtUtils]: Spent 2.20 s on a formula simplification. DAG size of input: 54 DAG size of output: 49 [2019-12-07 13:24:18,457 WARN L192 SmtUtils]: Spent 2.06 s on a formula simplification. DAG size of input: 56 DAG size of output: 52 [2019-12-07 13:24:18,988 WARN L192 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 52 [2019-12-07 13:24:19,239 WARN L192 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 52 [2019-12-07 13:24:23,469 WARN L192 SmtUtils]: Spent 4.03 s on a formula simplification that was a NOOP. DAG size: 56 [2019-12-07 13:24:27,633 WARN L192 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 44 [2019-12-07 13:24:29,691 WARN L192 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 46 [2019-12-07 13:24:30,477 WARN L192 SmtUtils]: Spent 747.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2019-12-07 13:24:30,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:24:30,611 INFO L93 Difference]: Finished difference Result 185 states and 190 transitions. [2019-12-07 13:24:30,611 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-12-07 13:24:30,611 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 99 [2019-12-07 13:24:30,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:24:30,612 INFO L225 Difference]: With dead ends: 185 [2019-12-07 13:24:30,612 INFO L226 Difference]: Without dead ends: 121 [2019-12-07 13:24:30,613 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 84 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 15.3s TimeCoverageRelationStatistics Valid=294, Invalid=3012, Unknown=0, NotChecked=0, Total=3306 [2019-12-07 13:24:30,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2019-12-07 13:24:30,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 118. [2019-12-07 13:24:30,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2019-12-07 13:24:30,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 122 transitions. [2019-12-07 13:24:30,616 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 122 transitions. Word has length 99 [2019-12-07 13:24:30,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:24:30,616 INFO L462 AbstractCegarLoop]: Abstraction has 118 states and 122 transitions. [2019-12-07 13:24:30,616 INFO L463 AbstractCegarLoop]: Interpolant automaton has 38 states. [2019-12-07 13:24:30,616 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 122 transitions. [2019-12-07 13:24:30,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2019-12-07 13:24:30,617 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:24:30,617 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:24:30,817 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:24:30,818 INFO L410 AbstractCegarLoop]: === Iteration 36 === [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]=== [2019-12-07 13:24:30,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:24:30,818 INFO L82 PathProgramCache]: Analyzing trace with hash -2054233072, now seen corresponding path program 11 times [2019-12-07 13:24:30,818 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:24:30,818 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042421950] [2019-12-07 13:24:30,818 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:24:30,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:24:31,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:24:31,025 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 47 proven. 130 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2019-12-07 13:24:31,025 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042421950] [2019-12-07 13:24:31,025 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982269994] [2019-12-07 13:24:31,025 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6ee30319-8eb7-4e19-9c50-0c0e1826f677/bin/uautomizer/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:24:31,170 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2019-12-07 13:24:31,171 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 13:24:31,172 INFO L264 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 49 conjunts are in the unsatisfiable core [2019-12-07 13:24:31,174 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:24:31,176 INFO L430 ElimStorePlain]: Different costs {0=[|v_#length_34|], 1=[|v_#valid_38|]} [2019-12-07 13:24:31,178 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-12-07 13:24:31,178 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 [2019-12-07 13:24:31,179 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 13:24:31,185 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:24:31,187 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 [2019-12-07 13:24:31,187 INFO L534 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-12-07 13:24:31,193 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:24:31,193 INFO L534 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-12-07 13:24:31,193 INFO L239 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:24, output treesize:12 [2019-12-07 13:24:31,482 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 28 proven. 149 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2019-12-07 13:24:31,483 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 13:24:31,483 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 32 [2019-12-07 13:24:31,483 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975160943] [2019-12-07 13:24:31,483 INFO L442 AbstractCegarLoop]: Interpolant automaton has 33 states [2019-12-07 13:24:31,483 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:24:31,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2019-12-07 13:24:31,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=926, Unknown=0, NotChecked=0, Total=1056 [2019-12-07 13:24:31,484 INFO L87 Difference]: Start difference. First operand 118 states and 122 transitions. Second operand 33 states. [2019-12-07 13:24:32,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:24:32,422 INFO L93 Difference]: Finished difference Result 131 states and 136 transitions. [2019-12-07 13:24:32,422 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-07 13:24:32,422 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 103 [2019-12-07 13:24:32,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:24:32,423 INFO L225 Difference]: With dead ends: 131 [2019-12-07 13:24:32,423 INFO L226 Difference]: Without dead ends: 131 [2019-12-07 13:24:32,423 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=198, Invalid=1524, Unknown=0, NotChecked=0, Total=1722 [2019-12-07 13:24:32,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2019-12-07 13:24:32,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 127. [2019-12-07 13:24:32,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2019-12-07 13:24:32,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 134 transitions. [2019-12-07 13:24:32,425 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 134 transitions. Word has length 103 [2019-12-07 13:24:32,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:24:32,426 INFO L462 AbstractCegarLoop]: Abstraction has 127 states and 134 transitions. [2019-12-07 13:24:32,426 INFO L463 AbstractCegarLoop]: Interpolant automaton has 33 states. [2019-12-07 13:24:32,426 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 134 transitions. [2019-12-07 13:24:32,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2019-12-07 13:24:32,426 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:24:32,426 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:24:32,627 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:24:32,627 INFO L410 AbstractCegarLoop]: === Iteration 37 === [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]=== [2019-12-07 13:24:32,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:24:32,628 INFO L82 PathProgramCache]: Analyzing trace with hash -1673012266, now seen corresponding path program 7 times [2019-12-07 13:24:32,628 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:24:32,628 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410064130] [2019-12-07 13:24:32,628 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:24:32,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:24:33,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:24:33,319 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 30 proven. 216 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:24:33,319 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410064130] [2019-12-07 13:24:33,319 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558197303] [2019-12-07 13:24:33,319 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6ee30319-8eb7-4e19-9c50-0c0e1826f677/bin/uautomizer/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:24:33,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:24:33,398 INFO L264 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 54 conjunts are in the unsatisfiable core [2019-12-07 13:24:33,400 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:24:33,580 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 14 treesize of output 10 [2019-12-07 13:24:33,580 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 13:24:33,584 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:24:33,584 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-12-07 13:24:33,584 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:17 [2019-12-07 13:24:34,200 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:24:34,200 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 30 treesize of output 26 [2019-12-07 13:24:34,201 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 13:24:34,236 INFO L614 ElimStorePlain]: treesize reduction 3, result has 85.0 percent of original size [2019-12-07 13:24:34,237 INFO L534 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 13:24:34,238 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:30, output treesize:8 [2019-12-07 13:24:34,352 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 13:24:34,370 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 30 proven. 150 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2019-12-07 13:24:34,370 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 13:24:34,370 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 24] total 47 [2019-12-07 13:24:34,370 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243907836] [2019-12-07 13:24:34,370 INFO L442 AbstractCegarLoop]: Interpolant automaton has 47 states [2019-12-07 13:24:34,371 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:24:34,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2019-12-07 13:24:34,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=2030, Unknown=0, NotChecked=0, Total=2162 [2019-12-07 13:24:34,371 INFO L87 Difference]: Start difference. First operand 127 states and 134 transitions. Second operand 47 states. [2019-12-07 13:24:39,348 WARN L192 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2019-12-07 13:24:39,694 WARN L192 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2019-12-07 13:24:40,007 WARN L192 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2019-12-07 13:24:40,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:24:40,563 INFO L93 Difference]: Finished difference Result 183 states and 190 transitions. [2019-12-07 13:24:40,564 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2019-12-07 13:24:40,564 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 107 [2019-12-07 13:24:40,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:24:40,565 INFO L225 Difference]: With dead ends: 183 [2019-12-07 13:24:40,565 INFO L226 Difference]: Without dead ends: 137 [2019-12-07 13:24:40,567 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 93 SyntacticMatches, 3 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1121 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=389, Invalid=5161, Unknown=0, NotChecked=0, Total=5550 [2019-12-07 13:24:40,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2019-12-07 13:24:40,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 131. [2019-12-07 13:24:40,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2019-12-07 13:24:40,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 138 transitions. [2019-12-07 13:24:40,571 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 138 transitions. Word has length 107 [2019-12-07 13:24:40,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:24:40,571 INFO L462 AbstractCegarLoop]: Abstraction has 131 states and 138 transitions. [2019-12-07 13:24:40,571 INFO L463 AbstractCegarLoop]: Interpolant automaton has 47 states. [2019-12-07 13:24:40,571 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 138 transitions. [2019-12-07 13:24:40,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2019-12-07 13:24:40,572 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:24:40,573 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:24:40,773 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:24:40,773 INFO L410 AbstractCegarLoop]: === Iteration 38 === [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]=== [2019-12-07 13:24:40,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:24:40,774 INFO L82 PathProgramCache]: Analyzing trace with hash -1961036711, now seen corresponding path program 8 times [2019-12-07 13:24:40,774 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:24:40,774 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710767439] [2019-12-07 13:24:40,775 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:24:40,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:24:40,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:24:41,021 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 47 proven. 154 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2019-12-07 13:24:41,022 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710767439] [2019-12-07 13:24:41,022 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180774472] [2019-12-07 13:24:41,022 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6ee30319-8eb7-4e19-9c50-0c0e1826f677/bin/uautomizer/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:24:41,107 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-07 13:24:41,107 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 13:24:41,108 INFO L264 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 45 conjunts are in the unsatisfiable core [2019-12-07 13:24:41,110 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:24:41,289 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 45 proven. 156 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2019-12-07 13:24:41,289 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 13:24:41,289 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 30 [2019-12-07 13:24:41,289 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753391681] [2019-12-07 13:24:41,290 INFO L442 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-12-07 13:24:41,290 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:24:41,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-12-07 13:24:41,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=790, Unknown=0, NotChecked=0, Total=930 [2019-12-07 13:24:41,290 INFO L87 Difference]: Start difference. First operand 131 states and 138 transitions. Second operand 31 states. [2019-12-07 13:24:42,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:24:42,434 INFO L93 Difference]: Finished difference Result 133 states and 138 transitions. [2019-12-07 13:24:42,434 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-07 13:24:42,434 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 111 [2019-12-07 13:24:42,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:24:42,435 INFO L225 Difference]: With dead ends: 133 [2019-12-07 13:24:42,435 INFO L226 Difference]: Without dead ends: 129 [2019-12-07 13:24:42,435 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=215, Invalid=1345, Unknown=0, NotChecked=0, Total=1560 [2019-12-07 13:24:42,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2019-12-07 13:24:42,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2019-12-07 13:24:42,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2019-12-07 13:24:42,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 133 transitions. [2019-12-07 13:24:42,437 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 133 transitions. Word has length 111 [2019-12-07 13:24:42,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:24:42,437 INFO L462 AbstractCegarLoop]: Abstraction has 129 states and 133 transitions. [2019-12-07 13:24:42,437 INFO L463 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-12-07 13:24:42,437 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 133 transitions. [2019-12-07 13:24:42,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2019-12-07 13:24:42,437 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:24:42,438 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:24:42,638 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:24:42,638 INFO L410 AbstractCegarLoop]: === Iteration 39 === [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]=== [2019-12-07 13:24:42,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:24:42,639 INFO L82 PathProgramCache]: Analyzing trace with hash -1099534708, now seen corresponding path program 12 times [2019-12-07 13:24:42,639 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:24:42,640 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678420605] [2019-12-07 13:24:42,640 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:24:42,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:24:43,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:24:43,109 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 31 proven. 189 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2019-12-07 13:24:43,109 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678420605] [2019-12-07 13:24:43,109 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467031318] [2019-12-07 13:24:43,110 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6ee30319-8eb7-4e19-9c50-0c0e1826f677/bin/uautomizer/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:24:43,320 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2019-12-07 13:24:43,320 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 13:24:43,322 INFO L264 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 59 conjunts are in the unsatisfiable core [2019-12-07 13:24:43,324 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:24:43,327 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 [2019-12-07 13:24:43,327 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 13:24:43,329 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:24:43,330 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-12-07 13:24:43,330 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:12, output treesize:8 [2019-12-07 13:24:43,521 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2019-12-07 13:24:43,521 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 13:24:43,525 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:24:43,526 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-12-07 13:24:43,526 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:21 [2019-12-07 13:24:43,561 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2019-12-07 13:24:43,561 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 13:24:43,567 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:24:43,567 INFO L534 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-12-07 13:24:43,568 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:35, output treesize:31 [2019-12-07 13:24:44,138 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:24:44,138 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 21 [2019-12-07 13:24:44,138 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-12-07 13:24:44,148 INFO L614 ElimStorePlain]: treesize reduction 8, result has 63.6 percent of original size [2019-12-07 13:24:44,148 INFO L534 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 13:24:44,148 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:38, output treesize:3 [2019-12-07 13:24:44,199 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 31 proven. 189 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2019-12-07 13:24:44,199 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 13:24:44,199 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 42 [2019-12-07 13:24:44,199 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28021837] [2019-12-07 13:24:44,200 INFO L442 AbstractCegarLoop]: Interpolant automaton has 42 states [2019-12-07 13:24:44,200 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:24:44,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2019-12-07 13:24:44,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=1622, Unknown=0, NotChecked=0, Total=1722 [2019-12-07 13:24:44,200 INFO L87 Difference]: Start difference. First operand 129 states and 133 transitions. Second operand 42 states. [2019-12-07 13:24:49,108 WARN L192 SmtUtils]: Spent 3.88 s on a formula simplification. DAG size of input: 55 DAG size of output: 37 [2019-12-07 13:25:03,645 WARN L192 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 53 DAG size of output: 44 [2019-12-07 13:25:06,645 WARN L192 SmtUtils]: Spent 2.87 s on a formula simplification. DAG size of input: 53 DAG size of output: 44 [2019-12-07 13:25:10,872 WARN L192 SmtUtils]: Spent 4.04 s on a formula simplification. DAG size of input: 53 DAG size of output: 44 [2019-12-07 13:25:15,089 WARN L192 SmtUtils]: Spent 4.03 s on a formula simplification. DAG size of input: 53 DAG size of output: 44 [2019-12-07 13:25:33,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:25:33,796 INFO L93 Difference]: Finished difference Result 211 states and 216 transitions. [2019-12-07 13:25:33,797 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-12-07 13:25:33,797 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 114 [2019-12-07 13:25:33,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:25:33,797 INFO L225 Difference]: With dead ends: 211 [2019-12-07 13:25:33,797 INFO L226 Difference]: Without dead ends: 136 [2019-12-07 13:25:33,798 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 97 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 387 ImplicationChecksByTransitivity, 38.9s TimeCoverageRelationStatistics Valid=223, Invalid=3074, Unknown=9, NotChecked=0, Total=3306 [2019-12-07 13:25:33,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2019-12-07 13:25:33,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 133. [2019-12-07 13:25:33,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2019-12-07 13:25:33,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 137 transitions. [2019-12-07 13:25:33,799 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 137 transitions. Word has length 114 [2019-12-07 13:25:33,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:25:33,800 INFO L462 AbstractCegarLoop]: Abstraction has 133 states and 137 transitions. [2019-12-07 13:25:33,800 INFO L463 AbstractCegarLoop]: Interpolant automaton has 42 states. [2019-12-07 13:25:33,800 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 137 transitions. [2019-12-07 13:25:33,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2019-12-07 13:25:33,800 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:25:33,800 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:25:34,001 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:25:34,002 INFO L410 AbstractCegarLoop]: === Iteration 40 === [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]=== [2019-12-07 13:25:34,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:25:34,002 INFO L82 PathProgramCache]: Analyzing trace with hash -606672919, now seen corresponding path program 13 times [2019-12-07 13:25:34,003 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:25:34,003 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938161555] [2019-12-07 13:25:34,003 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:25:34,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:25:34,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:25:34,260 INFO L134 CoverageAnalysis]: Checked inductivity of 311 backedges. 68 proven. 177 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2019-12-07 13:25:34,260 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938161555] [2019-12-07 13:25:34,260 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750381412] [2019-12-07 13:25:34,260 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6ee30319-8eb7-4e19-9c50-0c0e1826f677/bin/uautomizer/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:25:34,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:25:34,337 INFO L264 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 47 conjunts are in the unsatisfiable core [2019-12-07 13:25:34,339 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:25:34,519 INFO L134 CoverageAnalysis]: Checked inductivity of 311 backedges. 66 proven. 179 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2019-12-07 13:25:34,519 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 13:25:34,520 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 33 [2019-12-07 13:25:34,520 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194349558] [2019-12-07 13:25:34,520 INFO L442 AbstractCegarLoop]: Interpolant automaton has 34 states [2019-12-07 13:25:34,520 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:25:34,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2019-12-07 13:25:34,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=972, Unknown=0, NotChecked=0, Total=1122 [2019-12-07 13:25:34,520 INFO L87 Difference]: Start difference. First operand 133 states and 137 transitions. Second operand 34 states. [2019-12-07 13:25:35,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:25:35,272 INFO L93 Difference]: Finished difference Result 146 states and 151 transitions. [2019-12-07 13:25:35,272 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-07 13:25:35,272 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 118 [2019-12-07 13:25:35,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:25:35,273 INFO L225 Difference]: With dead ends: 146 [2019-12-07 13:25:35,273 INFO L226 Difference]: Without dead ends: 146 [2019-12-07 13:25:35,273 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=254, Invalid=1726, Unknown=0, NotChecked=0, Total=1980 [2019-12-07 13:25:35,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2019-12-07 13:25:35,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 142. [2019-12-07 13:25:35,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2019-12-07 13:25:35,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 149 transitions. [2019-12-07 13:25:35,275 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 149 transitions. Word has length 118 [2019-12-07 13:25:35,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:25:35,275 INFO L462 AbstractCegarLoop]: Abstraction has 142 states and 149 transitions. [2019-12-07 13:25:35,275 INFO L463 AbstractCegarLoop]: Interpolant automaton has 34 states. [2019-12-07 13:25:35,275 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 149 transitions. [2019-12-07 13:25:35,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2019-12-07 13:25:35,276 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:25:35,276 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:25:35,476 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:25:35,477 INFO L410 AbstractCegarLoop]: === Iteration 41 === [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]=== [2019-12-07 13:25:35,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:25:35,478 INFO L82 PathProgramCache]: Analyzing trace with hash -993506513, now seen corresponding path program 9 times [2019-12-07 13:25:35,478 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:25:35,478 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303398861] [2019-12-07 13:25:35,478 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:25:35,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:25:36,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:25:36,294 INFO L134 CoverageAnalysis]: Checked inductivity of 339 backedges. 35 proven. 304 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:25:36,294 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303398861] [2019-12-07 13:25:36,294 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717409712] [2019-12-07 13:25:36,294 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6ee30319-8eb7-4e19-9c50-0c0e1826f677/bin/uautomizer/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:25:36,607 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2019-12-07 13:25:36,607 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 13:25:36,610 INFO L264 TraceCheckSpWp]: Trace formula consists of 462 conjuncts, 102 conjunts are in the unsatisfiable core [2019-12-07 13:25:36,612 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:25:36,972 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 13 treesize of output 9 [2019-12-07 13:25:36,973 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 13:25:36,976 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:25:36,976 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 13:25:36,977 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:16 [2019-12-07 13:25:37,429 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:25:37,429 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 30 treesize of output 22 [2019-12-07 13:25:37,430 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 13:25:37,439 INFO L614 ElimStorePlain]: treesize reduction 4, result has 78.9 percent of original size [2019-12-07 13:25:37,439 INFO L534 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 13:25:37,439 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:33, output treesize:11 [2019-12-07 13:25:37,473 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 13:25:37,541 INFO L134 CoverageAnalysis]: Checked inductivity of 339 backedges. 35 proven. 304 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:25:37,541 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 13:25:37,542 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 60 [2019-12-07 13:25:37,542 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875126640] [2019-12-07 13:25:37,542 INFO L442 AbstractCegarLoop]: Interpolant automaton has 60 states [2019-12-07 13:25:37,542 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:25:37,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2019-12-07 13:25:37,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=3343, Unknown=0, NotChecked=0, Total=3540 [2019-12-07 13:25:37,543 INFO L87 Difference]: Start difference. First operand 142 states and 149 transitions. Second operand 60 states. [2019-12-07 13:25:44,081 WARN L192 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 41 [2019-12-07 13:25:44,362 WARN L192 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 43 [2019-12-07 13:25:45,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:25:45,162 INFO L93 Difference]: Finished difference Result 248 states and 258 transitions. [2019-12-07 13:25:45,163 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2019-12-07 13:25:45,163 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 122 [2019-12-07 13:25:45,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:25:45,165 INFO L225 Difference]: With dead ends: 248 [2019-12-07 13:25:45,165 INFO L226 Difference]: Without dead ends: 192 [2019-12-07 13:25:45,167 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 97 SyntacticMatches, 4 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2678 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=608, Invalid=9292, Unknown=0, NotChecked=0, Total=9900 [2019-12-07 13:25:45,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2019-12-07 13:25:45,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 146. [2019-12-07 13:25:45,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2019-12-07 13:25:45,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 153 transitions. [2019-12-07 13:25:45,170 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 153 transitions. Word has length 122 [2019-12-07 13:25:45,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:25:45,170 INFO L462 AbstractCegarLoop]: Abstraction has 146 states and 153 transitions. [2019-12-07 13:25:45,170 INFO L463 AbstractCegarLoop]: Interpolant automaton has 60 states. [2019-12-07 13:25:45,171 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 153 transitions. [2019-12-07 13:25:45,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2019-12-07 13:25:45,171 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:25:45,171 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:25:45,372 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:25:45,372 INFO L410 AbstractCegarLoop]: === Iteration 42 === [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]=== [2019-12-07 13:25:45,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:25:45,373 INFO L82 PathProgramCache]: Analyzing trace with hash 492117068, now seen corresponding path program 10 times [2019-12-07 13:25:45,373 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:25:45,374 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90153560] [2019-12-07 13:25:45,374 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:25:45,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:25:45,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:25:45,633 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 68 proven. 205 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2019-12-07 13:25:45,633 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90153560] [2019-12-07 13:25:45,633 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906447733] [2019-12-07 13:25:45,633 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6ee30319-8eb7-4e19-9c50-0c0e1826f677/bin/uautomizer/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:25:45,715 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-07 13:25:45,715 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 13:25:45,716 INFO L264 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 62 conjunts are in the unsatisfiable core [2019-12-07 13:25:45,718 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:25:45,727 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:25:45,727 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 [2019-12-07 13:25:45,728 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 13:25:45,738 INFO L614 ElimStorePlain]: treesize reduction 10, result has 64.3 percent of original size [2019-12-07 13:25:45,738 INFO L534 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-12-07 13:25:45,738 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:13, output treesize:9 [2019-12-07 13:25:45,763 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 16 treesize of output 12 [2019-12-07 13:25:45,763 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 13:25:45,767 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:25:45,767 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 13:25:45,767 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:21 [2019-12-07 13:25:46,788 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:25:46,788 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 54 [2019-12-07 13:25:46,788 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 13:25:46,819 INFO L614 ElimStorePlain]: treesize reduction 3, result has 94.6 percent of original size [2019-12-07 13:25:46,819 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 13:25:46,819 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-12-07 13:25:46,820 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-12-07 13:25:46,820 INFO L534 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 13:25:46,820 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:45, output treesize:28 [2019-12-07 13:25:46,859 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 13:25:46,859 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 13:25:46,859 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 13:25:46,975 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 72 proven. 201 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2019-12-07 13:25:46,975 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 13:25:46,975 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 27] total 39 [2019-12-07 13:25:46,975 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842591113] [2019-12-07 13:25:46,976 INFO L442 AbstractCegarLoop]: Interpolant automaton has 40 states [2019-12-07 13:25:46,976 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:25:46,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2019-12-07 13:25:46,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1445, Unknown=0, NotChecked=0, Total=1560 [2019-12-07 13:25:46,976 INFO L87 Difference]: Start difference. First operand 146 states and 153 transitions. Second operand 40 states. [2019-12-07 13:25:48,848 WARN L192 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 50 [2019-12-07 13:25:49,140 WARN L192 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 46 [2019-12-07 13:25:49,570 WARN L192 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 50 [2019-12-07 13:25:50,077 WARN L192 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 49 [2019-12-07 13:25:50,380 WARN L192 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 33 [2019-12-07 13:25:51,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:25:51,347 INFO L93 Difference]: Finished difference Result 148 states and 153 transitions. [2019-12-07 13:25:51,348 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-12-07 13:25:51,348 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 126 [2019-12-07 13:25:51,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:25:51,351 INFO L225 Difference]: With dead ends: 148 [2019-12-07 13:25:51,352 INFO L226 Difference]: Without dead ends: 144 [2019-12-07 13:25:51,353 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 108 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 658 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=313, Invalid=2993, Unknown=0, NotChecked=0, Total=3306 [2019-12-07 13:25:51,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2019-12-07 13:25:51,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2019-12-07 13:25:51,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2019-12-07 13:25:51,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 148 transitions. [2019-12-07 13:25:51,359 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 148 transitions. Word has length 126 [2019-12-07 13:25:51,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:25:51,360 INFO L462 AbstractCegarLoop]: Abstraction has 144 states and 148 transitions. [2019-12-07 13:25:51,360 INFO L463 AbstractCegarLoop]: Interpolant automaton has 40 states. [2019-12-07 13:25:51,361 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 148 transitions. [2019-12-07 13:25:51,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2019-12-07 13:25:51,362 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:25:51,363 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:25:51,563 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:25:51,563 INFO L410 AbstractCegarLoop]: === Iteration 43 === [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]=== [2019-12-07 13:25:51,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:25:51,564 INFO L82 PathProgramCache]: Analyzing trace with hash 1936154041, now seen corresponding path program 14 times [2019-12-07 13:25:51,564 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:25:51,564 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871672889] [2019-12-07 13:25:51,564 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:25:51,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:25:51,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:25:51,959 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 36 proven. 259 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2019-12-07 13:25:51,959 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871672889] [2019-12-07 13:25:51,959 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36641471] [2019-12-07 13:25:51,959 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6ee30319-8eb7-4e19-9c50-0c0e1826f677/bin/uautomizer/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:25:52,055 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-07 13:25:52,055 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 13:25:52,057 INFO L264 TraceCheckSpWp]: Trace formula consists of 489 conjuncts, 64 conjunts are in the unsatisfiable core [2019-12-07 13:25:52,059 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:25:52,281 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 14 treesize of output 10 [2019-12-07 13:25:52,281 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 13:25:52,285 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:25:52,285 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-12-07 13:25:52,285 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:17 [2019-12-07 13:25:53,085 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:25:53,086 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 52 [2019-12-07 13:25:53,086 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 13:25:53,102 INFO L614 ElimStorePlain]: treesize reduction 26, result has 46.9 percent of original size [2019-12-07 13:25:53,103 INFO L534 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 13:25:53,103 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:39, output treesize:8 [2019-12-07 13:25:53,141 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 13:25:53,176 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 8 proven. 287 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2019-12-07 13:25:53,176 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 13:25:53,176 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 28] total 50 [2019-12-07 13:25:53,176 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030394671] [2019-12-07 13:25:53,177 INFO L442 AbstractCegarLoop]: Interpolant automaton has 50 states [2019-12-07 13:25:53,177 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:25:53,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2019-12-07 13:25:53,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=2346, Unknown=0, NotChecked=0, Total=2450 [2019-12-07 13:25:53,177 INFO L87 Difference]: Start difference. First operand 144 states and 148 transitions. Second operand 50 states. [2019-12-07 13:25:59,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:25:59,162 INFO L93 Difference]: Finished difference Result 367 states and 372 transitions. [2019-12-07 13:25:59,163 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2019-12-07 13:25:59,163 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 129 [2019-12-07 13:25:59,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:25:59,163 INFO L225 Difference]: With dead ends: 367 [2019-12-07 13:25:59,164 INFO L226 Difference]: Without dead ends: 158 [2019-12-07 13:25:59,164 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 107 SyntacticMatches, 2 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1728 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=567, Invalid=10353, Unknown=0, NotChecked=0, Total=10920 [2019-12-07 13:25:59,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2019-12-07 13:25:59,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 152. [2019-12-07 13:25:59,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2019-12-07 13:25:59,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 156 transitions. [2019-12-07 13:25:59,167 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 156 transitions. Word has length 129 [2019-12-07 13:25:59,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:25:59,167 INFO L462 AbstractCegarLoop]: Abstraction has 152 states and 156 transitions. [2019-12-07 13:25:59,167 INFO L463 AbstractCegarLoop]: Interpolant automaton has 50 states. [2019-12-07 13:25:59,167 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 156 transitions. [2019-12-07 13:25:59,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2019-12-07 13:25:59,168 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:25:59,168 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:25:59,369 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:25:59,369 INFO L410 AbstractCegarLoop]: === Iteration 44 === [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]=== [2019-12-07 13:25:59,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:25:59,370 INFO L82 PathProgramCache]: Analyzing trace with hash 171788671, now seen corresponding path program 15 times [2019-12-07 13:25:59,370 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:25:59,370 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670684114] [2019-12-07 13:25:59,371 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:25:59,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:25:59,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:25:59,664 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 93 proven. 231 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2019-12-07 13:25:59,664 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670684114] [2019-12-07 13:25:59,664 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764339301] [2019-12-07 13:25:59,664 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6ee30319-8eb7-4e19-9c50-0c0e1826f677/bin/uautomizer/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:26:00,126 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2019-12-07 13:26:00,126 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 13:26:00,129 INFO L264 TraceCheckSpWp]: Trace formula consists of 511 conjuncts, 49 conjunts are in the unsatisfiable core [2019-12-07 13:26:00,131 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:26:00,133 INFO L430 ElimStorePlain]: Different costs {0=[|v_#length_36|], 1=[|v_#valid_40|]} [2019-12-07 13:26:00,135 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-12-07 13:26:00,136 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 [2019-12-07 13:26:00,136 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 13:26:00,142 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:26:00,145 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 [2019-12-07 13:26:00,145 INFO L534 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-12-07 13:26:00,150 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:26:00,151 INFO L534 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-12-07 13:26:00,151 INFO L239 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:24, output treesize:12 [2019-12-07 13:26:00,985 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 91 proven. 233 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2019-12-07 13:26:00,985 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 13:26:00,985 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21] total 43 [2019-12-07 13:26:00,986 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236049106] [2019-12-07 13:26:00,986 INFO L442 AbstractCegarLoop]: Interpolant automaton has 44 states [2019-12-07 13:26:00,986 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:26:00,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2019-12-07 13:26:00,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=1701, Unknown=0, NotChecked=0, Total=1892 [2019-12-07 13:26:00,986 INFO L87 Difference]: Start difference. First operand 152 states and 156 transitions. Second operand 44 states. [2019-12-07 13:26:02,522 WARN L192 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 27 [2019-12-07 13:26:03,078 WARN L192 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 27 [2019-12-07 13:26:04,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:26:04,096 INFO L93 Difference]: Finished difference Result 165 states and 170 transitions. [2019-12-07 13:26:04,096 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-12-07 13:26:04,096 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 137 [2019-12-07 13:26:04,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:26:04,097 INFO L225 Difference]: With dead ends: 165 [2019-12-07 13:26:04,097 INFO L226 Difference]: Without dead ends: 165 [2019-12-07 13:26:04,097 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 795 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=465, Invalid=3441, Unknown=0, NotChecked=0, Total=3906 [2019-12-07 13:26:04,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2019-12-07 13:26:04,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 161. [2019-12-07 13:26:04,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2019-12-07 13:26:04,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 168 transitions. [2019-12-07 13:26:04,099 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 168 transitions. Word has length 137 [2019-12-07 13:26:04,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:26:04,099 INFO L462 AbstractCegarLoop]: Abstraction has 161 states and 168 transitions. [2019-12-07 13:26:04,099 INFO L463 AbstractCegarLoop]: Interpolant automaton has 44 states. [2019-12-07 13:26:04,100 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 168 transitions. [2019-12-07 13:26:04,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2019-12-07 13:26:04,100 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:26:04,100 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:26:04,300 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:26:04,301 INFO L410 AbstractCegarLoop]: === Iteration 45 === [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]=== [2019-12-07 13:26:04,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:26:04,302 INFO L82 PathProgramCache]: Analyzing trace with hash -1353190971, now seen corresponding path program 11 times [2019-12-07 13:26:04,302 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:26:04,302 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377329727] [2019-12-07 13:26:04,303 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:26:04,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:26:04,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:26:04,606 INFO L134 CoverageAnalysis]: Checked inductivity of 476 backedges. 93 proven. 263 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2019-12-07 13:26:04,606 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377329727] [2019-12-07 13:26:04,606 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449155870] [2019-12-07 13:26:04,606 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6ee30319-8eb7-4e19-9c50-0c0e1826f677/bin/uautomizer/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:26:04,858 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2019-12-07 13:26:04,858 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 13:26:04,860 INFO L264 TraceCheckSpWp]: Trace formula consists of 525 conjuncts, 57 conjunts are in the unsatisfiable core [2019-12-07 13:26:04,862 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:26:04,872 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:26:04,872 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 [2019-12-07 13:26:04,877 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 13:26:04,889 INFO L614 ElimStorePlain]: treesize reduction 10, result has 64.3 percent of original size [2019-12-07 13:26:04,889 INFO L534 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-12-07 13:26:04,889 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:13, output treesize:9 [2019-12-07 13:26:05,149 INFO L134 CoverageAnalysis]: Checked inductivity of 476 backedges. 66 proven. 290 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2019-12-07 13:26:05,150 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 13:26:05,150 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 34 [2019-12-07 13:26:05,150 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871160038] [2019-12-07 13:26:05,150 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-12-07 13:26:05,150 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:26:05,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-12-07 13:26:05,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1062, Unknown=0, NotChecked=0, Total=1190 [2019-12-07 13:26:05,151 INFO L87 Difference]: Start difference. First operand 161 states and 168 transitions. Second operand 35 states. [2019-12-07 13:26:06,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:26:06,046 INFO L93 Difference]: Finished difference Result 163 states and 168 transitions. [2019-12-07 13:26:06,046 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-12-07 13:26:06,046 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 141 [2019-12-07 13:26:06,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:26:06,047 INFO L225 Difference]: With dead ends: 163 [2019-12-07 13:26:06,047 INFO L226 Difference]: Without dead ends: 159 [2019-12-07 13:26:06,047 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 129 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=208, Invalid=1862, Unknown=0, NotChecked=0, Total=2070 [2019-12-07 13:26:06,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2019-12-07 13:26:06,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 159. [2019-12-07 13:26:06,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2019-12-07 13:26:06,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 163 transitions. [2019-12-07 13:26:06,050 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 163 transitions. Word has length 141 [2019-12-07 13:26:06,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:26:06,050 INFO L462 AbstractCegarLoop]: Abstraction has 159 states and 163 transitions. [2019-12-07 13:26:06,050 INFO L463 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-12-07 13:26:06,050 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 163 transitions. [2019-12-07 13:26:06,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2019-12-07 13:26:06,051 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:26:06,051 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:26:06,251 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:26:06,251 INFO L410 AbstractCegarLoop]: === Iteration 46 === [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]=== [2019-12-07 13:26:06,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:26:06,252 INFO L82 PathProgramCache]: Analyzing trace with hash -349214304, now seen corresponding path program 16 times [2019-12-07 13:26:06,252 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:26:06,253 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413137835] [2019-12-07 13:26:06,253 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:26:06,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:26:06,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:26:06,727 INFO L134 CoverageAnalysis]: Checked inductivity of 501 backedges. 41 proven. 340 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2019-12-07 13:26:06,728 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413137835] [2019-12-07 13:26:06,728 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563803672] [2019-12-07 13:26:06,728 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6ee30319-8eb7-4e19-9c50-0c0e1826f677/bin/uautomizer/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:26:06,816 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-07 13:26:06,816 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 13:26:06,818 INFO L264 TraceCheckSpWp]: Trace formula consists of 485 conjuncts, 58 conjunts are in the unsatisfiable core [2019-12-07 13:26:06,820 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:26:06,829 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:26:06,829 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 [2019-12-07 13:26:06,829 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 13:26:06,839 INFO L614 ElimStorePlain]: treesize reduction 10, result has 64.3 percent of original size [2019-12-07 13:26:06,840 INFO L534 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-12-07 13:26:06,840 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:13, output treesize:9 [2019-12-07 13:26:07,154 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 15 treesize of output 11 [2019-12-07 13:26:07,154 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 13:26:07,157 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:26:07,157 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 13:26:07,157 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:17 [2019-12-07 13:26:07,792 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 24 treesize of output 18 [2019-12-07 13:26:07,792 INFO L534 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-12-07 13:26:07,801 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:26:07,803 INFO L172 IndexEqualityManager]: detected equality via solver [2019-12-07 13:26:07,812 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:26:07,813 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 43 [2019-12-07 13:26:07,813 INFO L534 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-12-07 13:26:07,831 INFO L614 ElimStorePlain]: treesize reduction 17, result has 62.2 percent of original size [2019-12-07 13:26:07,832 INFO L534 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 13:26:07,832 INFO L239 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:49, output treesize:8 [2019-12-07 13:26:07,866 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 13:26:07,921 INFO L134 CoverageAnalysis]: Checked inductivity of 501 backedges. 245 proven. 136 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2019-12-07 13:26:07,921 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 13:26:07,921 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 31] total 55 [2019-12-07 13:26:07,921 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242814793] [2019-12-07 13:26:07,922 INFO L442 AbstractCegarLoop]: Interpolant automaton has 55 states [2019-12-07 13:26:07,922 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:26:07,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2019-12-07 13:26:07,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=2731, Unknown=0, NotChecked=0, Total=2970 [2019-12-07 13:26:07,922 INFO L87 Difference]: Start difference. First operand 159 states and 163 transitions. Second operand 55 states. [2019-12-07 13:26:15,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:26:15,113 INFO L93 Difference]: Finished difference Result 407 states and 412 transitions. [2019-12-07 13:26:15,113 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2019-12-07 13:26:15,113 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 144 [2019-12-07 13:26:15,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:26:15,114 INFO L225 Difference]: With dead ends: 407 [2019-12-07 13:26:15,114 INFO L226 Difference]: Without dead ends: 173 [2019-12-07 13:26:15,114 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 118 SyntacticMatches, 2 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3577 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=1206, Invalid=14046, Unknown=0, NotChecked=0, Total=15252 [2019-12-07 13:26:15,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2019-12-07 13:26:15,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 167. [2019-12-07 13:26:15,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2019-12-07 13:26:15,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 171 transitions. [2019-12-07 13:26:15,116 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 171 transitions. Word has length 144 [2019-12-07 13:26:15,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:26:15,116 INFO L462 AbstractCegarLoop]: Abstraction has 167 states and 171 transitions. [2019-12-07 13:26:15,117 INFO L463 AbstractCegarLoop]: Interpolant automaton has 55 states. [2019-12-07 13:26:15,117 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 171 transitions. [2019-12-07 13:26:15,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2019-12-07 13:26:15,117 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:26:15,117 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:26:15,317 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:26:15,318 INFO L410 AbstractCegarLoop]: === Iteration 47 === [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]=== [2019-12-07 13:26:15,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:26:15,318 INFO L82 PathProgramCache]: Analyzing trace with hash 2138052890, now seen corresponding path program 17 times [2019-12-07 13:26:15,318 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:26:15,318 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896417902] [2019-12-07 13:26:15,318 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:26:15,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:26:15,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:26:15,618 INFO L134 CoverageAnalysis]: Checked inductivity of 567 backedges. 122 proven. 292 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2019-12-07 13:26:15,618 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896417902] [2019-12-07 13:26:15,618 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62701861] [2019-12-07 13:26:15,618 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6ee30319-8eb7-4e19-9c50-0c0e1826f677/bin/uautomizer/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:26:15,878 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2019-12-07 13:26:15,878 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 13:26:15,881 INFO L264 TraceCheckSpWp]: Trace formula consists of 563 conjuncts, 64 conjunts are in the unsatisfiable core [2019-12-07 13:26:15,883 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:26:15,885 INFO L430 ElimStorePlain]: Different costs {0=[|v_#length_39|], 1=[|v_#valid_41|]} [2019-12-07 13:26:15,889 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-12-07 13:26:15,890 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 [2019-12-07 13:26:15,890 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 13:26:15,896 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:26:15,899 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 [2019-12-07 13:26:15,899 INFO L534 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-12-07 13:26:15,904 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:26:15,904 INFO L534 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-12-07 13:26:15,904 INFO L239 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:24, output treesize:12 [2019-12-07 13:26:16,388 INFO L134 CoverageAnalysis]: Checked inductivity of 567 backedges. 120 proven. 294 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2019-12-07 13:26:16,389 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 13:26:16,389 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 22] total 43 [2019-12-07 13:26:16,389 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823099257] [2019-12-07 13:26:16,389 INFO L442 AbstractCegarLoop]: Interpolant automaton has 44 states [2019-12-07 13:26:16,389 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:26:16,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2019-12-07 13:26:16,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=1661, Unknown=0, NotChecked=0, Total=1892 [2019-12-07 13:26:16,390 INFO L87 Difference]: Start difference. First operand 167 states and 171 transitions. Second operand 44 states. [2019-12-07 13:26:17,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:26:17,886 INFO L93 Difference]: Finished difference Result 180 states and 185 transitions. [2019-12-07 13:26:17,888 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-12-07 13:26:17,888 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 152 [2019-12-07 13:26:17,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:26:17,892 INFO L225 Difference]: With dead ends: 180 [2019-12-07 13:26:17,892 INFO L226 Difference]: Without dead ends: 180 [2019-12-07 13:26:17,893 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 767 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=327, Invalid=2753, Unknown=0, NotChecked=0, Total=3080 [2019-12-07 13:26:17,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2019-12-07 13:26:17,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 176. [2019-12-07 13:26:17,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2019-12-07 13:26:17,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 183 transitions. [2019-12-07 13:26:17,903 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 183 transitions. Word has length 152 [2019-12-07 13:26:17,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:26:17,904 INFO L462 AbstractCegarLoop]: Abstraction has 176 states and 183 transitions. [2019-12-07 13:26:17,905 INFO L463 AbstractCegarLoop]: Interpolant automaton has 44 states. [2019-12-07 13:26:17,905 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 183 transitions. [2019-12-07 13:26:17,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2019-12-07 13:26:17,907 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:26:17,907 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:26:18,108 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:26:18,108 INFO L410 AbstractCegarLoop]: === Iteration 48 === [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]=== [2019-12-07 13:26:18,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:26:18,109 INFO L82 PathProgramCache]: Analyzing trace with hash -1458340896, now seen corresponding path program 12 times [2019-12-07 13:26:18,109 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:26:18,110 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973832726] [2019-12-07 13:26:18,110 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:26:18,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:26:18,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:26:18,484 INFO L134 CoverageAnalysis]: Checked inductivity of 603 backedges. 122 proven. 328 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2019-12-07 13:26:18,484 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973832726] [2019-12-07 13:26:18,484 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618911105] [2019-12-07 13:26:18,484 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6ee30319-8eb7-4e19-9c50-0c0e1826f677/bin/uautomizer/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:26:19,583 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2019-12-07 13:26:19,584 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 13:26:19,587 INFO L264 TraceCheckSpWp]: Trace formula consists of 577 conjuncts, 44 conjunts are in the unsatisfiable core [2019-12-07 13:26:19,589 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:26:19,598 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:26:19,598 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 [2019-12-07 13:26:19,599 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 13:26:19,609 INFO L614 ElimStorePlain]: treesize reduction 10, result has 64.3 percent of original size [2019-12-07 13:26:19,609 INFO L534 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-12-07 13:26:19,610 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:13, output treesize:9 [2019-12-07 13:26:19,628 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 16 treesize of output 12 [2019-12-07 13:26:19,629 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 13:26:19,632 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:26:19,633 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-12-07 13:26:19,633 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:19 [2019-12-07 13:26:20,098 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:26:20,098 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 56 [2019-12-07 13:26:20,099 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 13:26:20,218 WARN L192 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 34 [2019-12-07 13:26:20,218 INFO L614 ElimStorePlain]: treesize reduction 3, result has 95.2 percent of original size [2019-12-07 13:26:20,219 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 13:26:20,219 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 13:26:20,222 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-12-07 13:26:20,223 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 13:26:20,225 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-12-07 13:26:20,226 INFO L534 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 13:26:20,226 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:51, output treesize:51 [2019-12-07 13:26:20,391 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 13:26:20,392 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 13:26:20,393 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 13:26:20,671 INFO L134 CoverageAnalysis]: Checked inductivity of 603 backedges. 32 proven. 61 refuted. 0 times theorem prover too weak. 510 trivial. 0 not checked. [2019-12-07 13:26:20,672 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 13:26:20,672 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 12] total 36 [2019-12-07 13:26:20,672 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692374782] [2019-12-07 13:26:20,672 INFO L442 AbstractCegarLoop]: Interpolant automaton has 37 states [2019-12-07 13:26:20,672 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:26:20,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2019-12-07 13:26:20,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=1181, Unknown=0, NotChecked=0, Total=1332 [2019-12-07 13:26:20,673 INFO L87 Difference]: Start difference. First operand 176 states and 183 transitions. Second operand 37 states. [2019-12-07 13:26:22,253 WARN L192 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 53 [2019-12-07 13:26:22,596 WARN L192 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 49 [2019-12-07 13:26:22,951 WARN L192 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 53 [2019-12-07 13:26:24,000 WARN L192 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 52 [2019-12-07 13:26:24,240 WARN L192 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 56 [2019-12-07 13:26:25,793 WARN L192 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 56 [2019-12-07 13:26:26,157 WARN L192 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 56 [2019-12-07 13:26:26,458 WARN L192 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 55 [2019-12-07 13:26:27,083 WARN L192 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 56 [2019-12-07 13:26:29,154 WARN L192 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 52 [2019-12-07 13:26:29,501 WARN L192 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 55 [2019-12-07 13:26:30,311 WARN L192 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 56 [2019-12-07 13:26:30,842 WARN L192 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 62 [2019-12-07 13:26:31,277 WARN L192 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 64 [2019-12-07 13:26:31,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:26:31,499 INFO L93 Difference]: Finished difference Result 179 states and 184 transitions. [2019-12-07 13:26:31,500 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2019-12-07 13:26:31,501 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 156 [2019-12-07 13:26:31,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:26:31,504 INFO L225 Difference]: With dead ends: 179 [2019-12-07 13:26:31,504 INFO L226 Difference]: Without dead ends: 172 [2019-12-07 13:26:31,506 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2909 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=1104, Invalid=9402, Unknown=0, NotChecked=0, Total=10506 [2019-12-07 13:26:31,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2019-12-07 13:26:31,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 170. [2019-12-07 13:26:31,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2019-12-07 13:26:31,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 174 transitions. [2019-12-07 13:26:31,513 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 174 transitions. Word has length 156 [2019-12-07 13:26:31,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:26:31,514 INFO L462 AbstractCegarLoop]: Abstraction has 170 states and 174 transitions. [2019-12-07 13:26:31,514 INFO L463 AbstractCegarLoop]: Interpolant automaton has 37 states. [2019-12-07 13:26:31,515 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 174 transitions. [2019-12-07 13:26:31,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2019-12-07 13:26:31,516 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:26:31,517 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:26:31,718 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:26:31,718 INFO L410 AbstractCegarLoop]: === Iteration 49 === [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]=== [2019-12-07 13:26:31,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:26:31,719 INFO L82 PathProgramCache]: Analyzing trace with hash -1839471195, now seen corresponding path program 18 times [2019-12-07 13:26:31,719 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:26:31,720 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465652143] [2019-12-07 13:26:31,720 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:26:31,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:26:32,779 WARN L192 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 26 [2019-12-07 13:26:33,087 WARN L192 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 26 [2019-12-07 13:26:34,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:26:34,530 INFO L134 CoverageAnalysis]: Checked inductivity of 631 backedges. 10 proven. 621 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:26:34,530 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465652143] [2019-12-07 13:26:34,531 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917897176] [2019-12-07 13:26:34,531 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6ee30319-8eb7-4e19-9c50-0c0e1826f677/bin/uautomizer/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:26:35,438 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2019-12-07 13:26:35,438 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 13:26:35,442 INFO L264 TraceCheckSpWp]: Trace formula consists of 593 conjuncts, 79 conjunts are in the unsatisfiable core [2019-12-07 13:26:35,444 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:26:35,446 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 [2019-12-07 13:26:35,446 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 13:26:35,449 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:26:35,449 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-12-07 13:26:35,450 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:12, output treesize:8 [2019-12-07 13:26:35,901 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2019-12-07 13:26:35,901 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 13:26:35,906 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:26:35,906 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-12-07 13:26:35,906 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:21 [2019-12-07 13:26:35,967 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2019-12-07 13:26:35,967 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 13:26:35,975 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:26:35,975 INFO L534 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-12-07 13:26:35,975 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:35, output treesize:31 [2019-12-07 13:26:38,517 INFO L134 CoverageAnalysis]: Checked inductivity of 631 backedges. 46 proven. 432 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2019-12-07 13:26:38,517 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 13:26:38,517 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 29] total 74 [2019-12-07 13:26:38,517 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017936189] [2019-12-07 13:26:38,517 INFO L442 AbstractCegarLoop]: Interpolant automaton has 74 states [2019-12-07 13:26:38,518 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:26:38,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2019-12-07 13:26:38,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=5218, Unknown=0, NotChecked=0, Total=5402 [2019-12-07 13:26:38,518 INFO L87 Difference]: Start difference. First operand 170 states and 174 transitions. Second operand 74 states. [2019-12-07 13:26:40,756 WARN L192 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 31 [2019-12-07 13:26:42,189 WARN L192 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 32 [2019-12-07 13:26:43,002 WARN L192 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 32 [2019-12-07 13:26:49,855 WARN L192 SmtUtils]: Spent 4.04 s on a formula simplification. DAG size of input: 63 DAG size of output: 59 [2019-12-07 13:26:54,333 WARN L192 SmtUtils]: Spent 4.04 s on a formula simplification. DAG size of input: 63 DAG size of output: 59 [2019-12-07 13:27:00,789 WARN L192 SmtUtils]: Spent 4.04 s on a formula simplification. DAG size of input: 63 DAG size of output: 59 [2019-12-07 13:27:05,258 WARN L192 SmtUtils]: Spent 4.04 s on a formula simplification. DAG size of input: 63 DAG size of output: 59 [2019-12-07 13:27:09,716 WARN L192 SmtUtils]: Spent 4.04 s on a formula simplification. DAG size of input: 63 DAG size of output: 59 [2019-12-07 13:27:14,162 WARN L192 SmtUtils]: Spent 4.04 s on a formula simplification. DAG size of input: 63 DAG size of output: 59 [2019-12-07 13:27:18,642 WARN L192 SmtUtils]: Spent 4.04 s on a formula simplification. DAG size of input: 63 DAG size of output: 59 [2019-12-07 13:27:23,089 WARN L192 SmtUtils]: Spent 4.04 s on a formula simplification. DAG size of input: 63 DAG size of output: 59 [2019-12-07 13:27:27,530 WARN L192 SmtUtils]: Spent 4.04 s on a formula simplification. DAG size of input: 61 DAG size of output: 57 [2019-12-07 13:27:31,699 WARN L192 SmtUtils]: Spent 4.04 s on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2019-12-07 13:27:35,849 WARN L192 SmtUtils]: Spent 4.04 s on a formula simplification. DAG size of input: 66 DAG size of output: 62 [2019-12-07 13:27:36,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:27:36,208 INFO L93 Difference]: Finished difference Result 362 states and 367 transitions. [2019-12-07 13:27:36,208 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2019-12-07 13:27:36,208 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 159 [2019-12-07 13:27:36,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:27:36,209 INFO L225 Difference]: With dead ends: 362 [2019-12-07 13:27:36,209 INFO L226 Difference]: Without dead ends: 177 [2019-12-07 13:27:36,210 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 134 SyntacticMatches, 1 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3145 ImplicationChecksByTransitivity, 54.8s TimeCoverageRelationStatistics Valid=684, Invalid=15828, Unknown=0, NotChecked=0, Total=16512 [2019-12-07 13:27:36,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2019-12-07 13:27:36,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 174. [2019-12-07 13:27:36,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2019-12-07 13:27:36,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 178 transitions. [2019-12-07 13:27:36,212 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 178 transitions. Word has length 159 [2019-12-07 13:27:36,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:27:36,212 INFO L462 AbstractCegarLoop]: Abstraction has 174 states and 178 transitions. [2019-12-07 13:27:36,212 INFO L463 AbstractCegarLoop]: Interpolant automaton has 74 states. [2019-12-07 13:27:36,212 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 178 transitions. [2019-12-07 13:27:36,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2019-12-07 13:27:36,213 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:27:36,213 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:27:36,413 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:27:36,413 INFO L410 AbstractCegarLoop]: === Iteration 50 === [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]=== [2019-12-07 13:27:36,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:27:36,414 INFO L82 PathProgramCache]: Analyzing trace with hash -1822785688, now seen corresponding path program 19 times [2019-12-07 13:27:36,414 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:27:36,414 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633824310] [2019-12-07 13:27:36,415 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:27:36,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:27:36,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:27:36,767 INFO L134 CoverageAnalysis]: Checked inductivity of 668 backedges. 155 proven. 360 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2019-12-07 13:27:36,767 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633824310] [2019-12-07 13:27:36,767 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894798248] [2019-12-07 13:27:36,767 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6ee30319-8eb7-4e19-9c50-0c0e1826f677/bin/uautomizer/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:27:36,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:27:36,859 INFO L264 TraceCheckSpWp]: Trace formula consists of 604 conjuncts, 62 conjunts are in the unsatisfiable core [2019-12-07 13:27:36,861 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:27:37,158 INFO L134 CoverageAnalysis]: Checked inductivity of 668 backedges. 153 proven. 362 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2019-12-07 13:27:37,158 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 13:27:37,158 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26] total 42 [2019-12-07 13:27:37,158 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609085578] [2019-12-07 13:27:37,158 INFO L442 AbstractCegarLoop]: Interpolant automaton has 43 states [2019-12-07 13:27:37,158 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:27:37,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2019-12-07 13:27:37,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=1560, Unknown=0, NotChecked=0, Total=1806 [2019-12-07 13:27:37,159 INFO L87 Difference]: Start difference. First operand 174 states and 178 transitions. Second operand 43 states. [2019-12-07 13:27:40,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:27:40,171 INFO L93 Difference]: Finished difference Result 183 states and 188 transitions. [2019-12-07 13:27:40,172 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-12-07 13:27:40,172 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 163 [2019-12-07 13:27:40,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:27:40,175 INFO L225 Difference]: With dead ends: 183 [2019-12-07 13:27:40,175 INFO L226 Difference]: Without dead ends: 181 [2019-12-07 13:27:40,176 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 892 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=383, Invalid=2809, Unknown=0, NotChecked=0, Total=3192 [2019-12-07 13:27:40,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2019-12-07 13:27:40,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2019-12-07 13:27:40,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2019-12-07 13:27:40,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 185 transitions. [2019-12-07 13:27:40,182 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 185 transitions. Word has length 163 [2019-12-07 13:27:40,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:27:40,183 INFO L462 AbstractCegarLoop]: Abstraction has 181 states and 185 transitions. [2019-12-07 13:27:40,183 INFO L463 AbstractCegarLoop]: Interpolant automaton has 43 states. [2019-12-07 13:27:40,183 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 185 transitions. [2019-12-07 13:27:40,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2019-12-07 13:27:40,185 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:27:40,185 INFO L410 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:27:40,386 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:27:40,386 INFO L410 AbstractCegarLoop]: === Iteration 51 === [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]=== [2019-12-07 13:27:40,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:27:40,387 INFO L82 PathProgramCache]: Analyzing trace with hash -2119275625, now seen corresponding path program 20 times [2019-12-07 13:27:40,387 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:27:40,388 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388667940] [2019-12-07 13:27:40,388 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:27:40,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:27:40,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:27:40,701 INFO L134 CoverageAnalysis]: Checked inductivity of 739 backedges. 328 proven. 221 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2019-12-07 13:27:40,701 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388667940] [2019-12-07 13:27:40,701 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339171654] [2019-12-07 13:27:40,701 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6ee30319-8eb7-4e19-9c50-0c0e1826f677/bin/uautomizer/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:27:40,799 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-07 13:27:40,799 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 13:27:40,801 INFO L264 TraceCheckSpWp]: Trace formula consists of 634 conjuncts, 53 conjunts are in the unsatisfiable core [2019-12-07 13:27:40,803 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:27:40,813 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:27:40,813 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 [2019-12-07 13:27:40,813 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 13:27:40,826 INFO L614 ElimStorePlain]: treesize reduction 10, result has 64.3 percent of original size [2019-12-07 13:27:40,826 INFO L534 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-12-07 13:27:40,827 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:13, output treesize:9 [2019-12-07 13:27:41,288 INFO L134 CoverageAnalysis]: Checked inductivity of 739 backedges. 396 proven. 153 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2019-12-07 13:27:41,289 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 13:27:41,289 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 26] total 52 [2019-12-07 13:27:41,289 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194923622] [2019-12-07 13:27:41,289 INFO L442 AbstractCegarLoop]: Interpolant automaton has 52 states [2019-12-07 13:27:41,289 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:27:41,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2019-12-07 13:27:41,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=439, Invalid=2213, Unknown=0, NotChecked=0, Total=2652 [2019-12-07 13:27:41,290 INFO L87 Difference]: Start difference. First operand 181 states and 185 transitions. Second operand 52 states. [2019-12-07 13:27:42,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:27:42,111 INFO L93 Difference]: Finished difference Result 267 states and 271 transitions. [2019-12-07 13:27:42,111 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-12-07 13:27:42,111 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 170 [2019-12-07 13:27:42,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:27:42,112 INFO L225 Difference]: With dead ends: 267 [2019-12-07 13:27:42,112 INFO L226 Difference]: Without dead ends: 188 [2019-12-07 13:27:42,112 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1651 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=686, Invalid=3474, Unknown=0, NotChecked=0, Total=4160 [2019-12-07 13:27:42,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2019-12-07 13:27:42,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 185. [2019-12-07 13:27:42,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2019-12-07 13:27:42,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 189 transitions. [2019-12-07 13:27:42,114 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 189 transitions. Word has length 170 [2019-12-07 13:27:42,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:27:42,114 INFO L462 AbstractCegarLoop]: Abstraction has 185 states and 189 transitions. [2019-12-07 13:27:42,115 INFO L463 AbstractCegarLoop]: Interpolant automaton has 52 states. [2019-12-07 13:27:42,115 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 189 transitions. [2019-12-07 13:27:42,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2019-12-07 13:27:42,115 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:27:42,115 INFO L410 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:27:42,316 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:27:42,316 INFO L410 AbstractCegarLoop]: === Iteration 52 === [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]=== [2019-12-07 13:27:42,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:27:42,317 INFO L82 PathProgramCache]: Analyzing trace with hash 681365172, now seen corresponding path program 21 times [2019-12-07 13:27:42,318 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:27:42,318 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444111226] [2019-12-07 13:27:42,318 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:27:42,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:27:42,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:27:43,048 INFO L134 CoverageAnalysis]: Checked inductivity of 776 backedges. 51 proven. 535 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2019-12-07 13:27:43,048 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444111226] [2019-12-07 13:27:43,048 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997657381] [2019-12-07 13:27:43,048 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6ee30319-8eb7-4e19-9c50-0c0e1826f677/bin/uautomizer/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:27:44,860 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2019-12-07 13:27:44,861 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 13:27:44,866 INFO L264 TraceCheckSpWp]: Trace formula consists of 645 conjuncts, 115 conjunts are in the unsatisfiable core [2019-12-07 13:27:44,868 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:27:45,797 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 14 treesize of output 10 [2019-12-07 13:27:45,798 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 13:27:45,802 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:27:45,803 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-12-07 13:27:45,803 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:20 [2019-12-07 13:27:48,250 INFO L172 IndexEqualityManager]: detected equality via solver [2019-12-07 13:27:48,259 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:27:48,259 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 43 [2019-12-07 13:27:48,259 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 13:27:48,275 INFO L614 ElimStorePlain]: treesize reduction 15, result has 62.5 percent of original size [2019-12-07 13:27:48,275 INFO L534 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 13:27:48,275 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:38, output treesize:8 [2019-12-07 13:27:48,327 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 13:27:48,412 INFO L134 CoverageAnalysis]: Checked inductivity of 776 backedges. 11 proven. 765 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:27:48,413 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 13:27:48,413 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 47] total 75 [2019-12-07 13:27:48,413 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124272231] [2019-12-07 13:27:48,413 INFO L442 AbstractCegarLoop]: Interpolant automaton has 75 states [2019-12-07 13:27:48,413 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:27:48,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2019-12-07 13:27:48,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=5368, Unknown=0, NotChecked=0, Total=5550 [2019-12-07 13:27:48,414 INFO L87 Difference]: Start difference. First operand 185 states and 189 transitions. Second operand 75 states. [2019-12-07 13:28:03,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:28:03,472 INFO L93 Difference]: Finished difference Result 483 states and 488 transitions. [2019-12-07 13:28:03,472 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2019-12-07 13:28:03,472 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 174 [2019-12-07 13:28:03,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:28:03,473 INFO L225 Difference]: With dead ends: 483 [2019-12-07 13:28:03,473 INFO L226 Difference]: Without dead ends: 199 [2019-12-07 13:28:03,474 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 132 SyntacticMatches, 2 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4363 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=849, Invalid=22407, Unknown=0, NotChecked=0, Total=23256 [2019-12-07 13:28:03,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2019-12-07 13:28:03,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 193. [2019-12-07 13:28:03,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2019-12-07 13:28:03,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 197 transitions. [2019-12-07 13:28:03,477 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 197 transitions. Word has length 174 [2019-12-07 13:28:03,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:28:03,477 INFO L462 AbstractCegarLoop]: Abstraction has 193 states and 197 transitions. [2019-12-07 13:28:03,477 INFO L463 AbstractCegarLoop]: Interpolant automaton has 75 states. [2019-12-07 13:28:03,477 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 197 transitions. [2019-12-07 13:28:03,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2019-12-07 13:28:03,478 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:28:03,479 INFO L410 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:28:03,679 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:28:03,680 INFO L410 AbstractCegarLoop]: === Iteration 53 === [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]=== [2019-12-07 13:28:03,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:28:03,681 INFO L82 PathProgramCache]: Analyzing trace with hash -119444306, now seen corresponding path program 22 times [2019-12-07 13:28:03,681 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:28:03,681 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501413309] [2019-12-07 13:28:03,682 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:28:03,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:28:04,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:28:04,107 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 192 proven. 435 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2019-12-07 13:28:04,107 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501413309] [2019-12-07 13:28:04,108 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604239168] [2019-12-07 13:28:04,108 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6ee30319-8eb7-4e19-9c50-0c0e1826f677/bin/uautomizer/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:28:04,204 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-07 13:28:04,204 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 13:28:04,206 INFO L264 TraceCheckSpWp]: Trace formula consists of 593 conjuncts, 81 conjunts are in the unsatisfiable core [2019-12-07 13:28:04,208 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:28:04,210 INFO L430 ElimStorePlain]: Different costs {0=[|v_#length_42|], 1=[|v_#valid_43|]} [2019-12-07 13:28:04,212 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-12-07 13:28:04,212 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 [2019-12-07 13:28:04,212 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 13:28:04,218 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:28:04,220 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 [2019-12-07 13:28:04,220 INFO L534 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-12-07 13:28:04,226 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:28:04,226 INFO L534 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-12-07 13:28:04,226 INFO L239 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:24, output treesize:21 [2019-12-07 13:28:04,647 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2019-12-07 13:28:04,647 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 13:28:04,654 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:28:04,654 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 13:28:04,654 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:36, output treesize:32 [2019-12-07 13:28:04,698 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2019-12-07 13:28:04,699 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 13:28:04,705 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:28:04,705 INFO L534 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-12-07 13:28:04,705 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:39 [2019-12-07 13:28:06,644 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:28:06,644 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 22 [2019-12-07 13:28:06,644 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-12-07 13:28:06,652 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:28:06,652 INFO L534 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 13:28:06,652 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:24 [2019-12-07 13:28:06,717 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 13:28:06,717 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 13:28:07,335 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 200 proven. 427 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2019-12-07 13:28:07,335 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 13:28:07,336 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 32] total 60 [2019-12-07 13:28:07,336 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005595111] [2019-12-07 13:28:07,336 INFO L442 AbstractCegarLoop]: Interpolant automaton has 61 states [2019-12-07 13:28:07,336 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:28:07,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2019-12-07 13:28:07,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=3333, Unknown=0, NotChecked=0, Total=3660 [2019-12-07 13:28:07,337 INFO L87 Difference]: Start difference. First operand 193 states and 197 transitions. Second operand 61 states. [2019-12-07 13:28:11,143 WARN L192 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 48 [2019-12-07 13:28:12,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:28:12,929 INFO L93 Difference]: Finished difference Result 202 states and 207 transitions. [2019-12-07 13:28:12,929 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-12-07 13:28:12,929 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 182 [2019-12-07 13:28:12,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:28:12,930 INFO L225 Difference]: With dead ends: 202 [2019-12-07 13:28:12,930 INFO L226 Difference]: Without dead ends: 200 [2019-12-07 13:28:12,930 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1318 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=579, Invalid=5583, Unknown=0, NotChecked=0, Total=6162 [2019-12-07 13:28:12,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2019-12-07 13:28:12,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 200. [2019-12-07 13:28:12,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2019-12-07 13:28:12,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 204 transitions. [2019-12-07 13:28:12,933 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 204 transitions. Word has length 182 [2019-12-07 13:28:12,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:28:12,933 INFO L462 AbstractCegarLoop]: Abstraction has 200 states and 204 transitions. [2019-12-07 13:28:12,933 INFO L463 AbstractCegarLoop]: Interpolant automaton has 61 states. [2019-12-07 13:28:12,933 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 204 transitions. [2019-12-07 13:28:12,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2019-12-07 13:28:12,934 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:28:12,934 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:28:13,134 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:28:13,135 INFO L410 AbstractCegarLoop]: === Iteration 54 === [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]=== [2019-12-07 13:28:13,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:28:13,135 INFO L82 PathProgramCache]: Analyzing trace with hash -679140463, now seen corresponding path program 23 times [2019-12-07 13:28:13,136 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:28:13,136 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76608836] [2019-12-07 13:28:13,136 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:28:13,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:28:14,392 WARN L192 SmtUtils]: Spent 386.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2019-12-07 13:28:14,825 WARN L192 SmtUtils]: Spent 338.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2019-12-07 13:28:15,132 WARN L192 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 24 [2019-12-07 13:28:15,504 WARN L192 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 28 [2019-12-07 13:28:15,898 WARN L192 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 30 [2019-12-07 13:28:16,241 WARN L192 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 32 [2019-12-07 13:28:16,804 WARN L192 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 32 [2019-12-07 13:28:17,096 WARN L192 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 32 [2019-12-07 13:28:22,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:28:22,303 INFO L134 CoverageAnalysis]: Checked inductivity of 936 backedges. 12 proven. 924 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:28:22,304 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76608836] [2019-12-07 13:28:22,304 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982954713] [2019-12-07 13:28:22,304 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6ee30319-8eb7-4e19-9c50-0c0e1826f677/bin/uautomizer/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:28:23,358 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2019-12-07 13:28:23,358 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 13:28:23,363 INFO L264 TraceCheckSpWp]: Trace formula consists of 697 conjuncts, 88 conjunts are in the unsatisfiable core [2019-12-07 13:28:23,364 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:28:24,190 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 14 treesize of output 10 [2019-12-07 13:28:24,190 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 13:28:24,210 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:28:24,211 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-12-07 13:28:24,211 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:17 [2019-12-07 13:28:26,146 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:28:26,146 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 30 treesize of output 26 [2019-12-07 13:28:26,147 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 13:28:26,203 INFO L614 ElimStorePlain]: treesize reduction 3, result has 85.0 percent of original size [2019-12-07 13:28:26,204 INFO L534 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 13:28:26,205 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:30, output treesize:8 [2019-12-07 13:28:26,520 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 13:28:26,587 INFO L134 CoverageAnalysis]: Checked inductivity of 936 backedges. 12 proven. 693 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2019-12-07 13:28:26,587 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 13:28:26,587 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 36] total 74 [2019-12-07 13:28:26,588 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350489033] [2019-12-07 13:28:26,588 INFO L442 AbstractCegarLoop]: Interpolant automaton has 74 states [2019-12-07 13:28:26,588 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:28:26,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2019-12-07 13:28:26,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=5219, Unknown=0, NotChecked=0, Total=5402 [2019-12-07 13:28:26,588 INFO L87 Difference]: Start difference. First operand 200 states and 204 transitions. Second operand 74 states. [2019-12-07 13:28:29,411 WARN L192 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 35 [2019-12-07 13:28:30,533 WARN L192 SmtUtils]: Spent 371.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 35 [2019-12-07 13:28:31,478 WARN L192 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 35 [2019-12-07 13:28:32,395 WARN L192 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 35 [2019-12-07 13:28:33,509 WARN L192 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 35 [2019-12-07 13:28:34,184 WARN L192 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 26 [2019-12-07 13:28:40,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:28:40,693 INFO L93 Difference]: Finished difference Result 446 states and 452 transitions. [2019-12-07 13:28:40,693 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2019-12-07 13:28:40,693 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 189 [2019-12-07 13:28:40,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:28:40,694 INFO L225 Difference]: With dead ends: 446 [2019-12-07 13:28:40,694 INFO L226 Difference]: Without dead ends: 270 [2019-12-07 13:28:40,695 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 170 SyntacticMatches, 2 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2603 ImplicationChecksByTransitivity, 18.6s TimeCoverageRelationStatistics Valid=769, Invalid=16787, Unknown=0, NotChecked=0, Total=17556 [2019-12-07 13:28:40,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2019-12-07 13:28:40,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 204. [2019-12-07 13:28:40,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2019-12-07 13:28:40,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 208 transitions. [2019-12-07 13:28:40,697 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 208 transitions. Word has length 189 [2019-12-07 13:28:40,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:28:40,697 INFO L462 AbstractCegarLoop]: Abstraction has 204 states and 208 transitions. [2019-12-07 13:28:40,697 INFO L463 AbstractCegarLoop]: Interpolant automaton has 74 states. [2019-12-07 13:28:40,697 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 208 transitions. [2019-12-07 13:28:40,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2019-12-07 13:28:40,698 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:28:40,698 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:28:40,898 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:28:40,899 INFO L410 AbstractCegarLoop]: === Iteration 55 === [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]=== [2019-12-07 13:28:40,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:28:40,900 INFO L82 PathProgramCache]: Analyzing trace with hash -1352218284, now seen corresponding path program 24 times [2019-12-07 13:28:40,900 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:28:40,900 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724184398] [2019-12-07 13:28:40,901 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:28:40,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:28:42,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:28:42,386 INFO L134 CoverageAnalysis]: Checked inductivity of 981 backedges. 56 proven. 925 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:28:42,386 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724184398] [2019-12-07 13:28:42,386 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11536550] [2019-12-07 13:28:42,386 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6ee30319-8eb7-4e19-9c50-0c0e1826f677/bin/uautomizer/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:28:44,463 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-12-07 13:28:44,463 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 13:28:44,469 INFO L264 TraceCheckSpWp]: Trace formula consists of 708 conjuncts, 109 conjunts are in the unsatisfiable core [2019-12-07 13:28:44,471 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:28:44,473 INFO L430 ElimStorePlain]: Different costs {0=[|v_#length_43|], 1=[|v_#valid_44|]} [2019-12-07 13:28:44,475 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-12-07 13:28:44,475 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 [2019-12-07 13:28:44,475 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 13:28:44,482 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:28:44,484 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 [2019-12-07 13:28:44,484 INFO L534 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-12-07 13:28:44,490 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:28:44,490 INFO L534 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-12-07 13:28:44,490 INFO L239 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:24, output treesize:21 [2019-12-07 13:28:45,095 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2019-12-07 13:28:45,095 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 13:28:45,107 INFO L614 ElimStorePlain]: treesize reduction 3, result has 90.3 percent of original size [2019-12-07 13:28:45,107 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 13:28:45,107 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:28 [2019-12-07 13:28:45,165 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2019-12-07 13:28:45,165 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 13:28:45,175 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:28:45,175 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-12-07 13:28:45,176 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:31 [2019-12-07 13:28:47,019 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:28:47,019 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 23 [2019-12-07 13:28:47,020 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 13:28:47,020 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 13:28:47,030 INFO L614 ElimStorePlain]: treesize reduction 3, result has 88.5 percent of original size [2019-12-07 13:28:47,031 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 13:28:47,031 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:48, output treesize:19 [2019-12-07 13:28:47,371 INFO L134 CoverageAnalysis]: Checked inductivity of 981 backedges. 0 proven. 749 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2019-12-07 13:28:47,371 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 13:28:47,371 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 33] total 77 [2019-12-07 13:28:47,371 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949626592] [2019-12-07 13:28:47,371 INFO L442 AbstractCegarLoop]: Interpolant automaton has 77 states [2019-12-07 13:28:47,372 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:28:47,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2019-12-07 13:28:47,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=5674, Unknown=0, NotChecked=0, Total=5852 [2019-12-07 13:28:47,372 INFO L87 Difference]: Start difference. First operand 204 states and 208 transitions. Second operand 77 states. [2019-12-07 13:28:52,693 WARN L192 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 28 [2019-12-07 13:29:01,976 WARN L192 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 48 [2019-12-07 13:29:03,243 WARN L192 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 45 [2019-12-07 13:29:03,796 WARN L192 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 47 [2019-12-07 13:29:04,307 WARN L192 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 50 [2019-12-07 13:29:04,868 WARN L192 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 44 [2019-12-07 13:29:05,257 WARN L192 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 51 [2019-12-07 13:29:05,804 WARN L192 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 47 [2019-12-07 13:29:06,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:29:06,793 INFO L93 Difference]: Finished difference Result 357 states and 363 transitions. [2019-12-07 13:29:06,793 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2019-12-07 13:29:06,794 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 193 [2019-12-07 13:29:06,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:29:06,794 INFO L225 Difference]: With dead ends: 357 [2019-12-07 13:29:06,794 INFO L226 Difference]: Without dead ends: 218 [2019-12-07 13:29:06,795 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 163 SyntacticMatches, 4 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4150 ImplicationChecksByTransitivity, 13.1s TimeCoverageRelationStatistics Valid=692, Invalid=19614, Unknown=0, NotChecked=0, Total=20306 [2019-12-07 13:29:06,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2019-12-07 13:29:06,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 215. [2019-12-07 13:29:06,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2019-12-07 13:29:06,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 219 transitions. [2019-12-07 13:29:06,797 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 219 transitions. Word has length 193 [2019-12-07 13:29:06,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:29:06,797 INFO L462 AbstractCegarLoop]: Abstraction has 215 states and 219 transitions. [2019-12-07 13:29:06,797 INFO L463 AbstractCegarLoop]: Interpolant automaton has 77 states. [2019-12-07 13:29:06,797 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 219 transitions. [2019-12-07 13:29:06,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2019-12-07 13:29:06,798 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:29:06,798 INFO L410 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:29:06,998 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:29:06,999 INFO L410 AbstractCegarLoop]: === Iteration 56 === [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]=== [2019-12-07 13:29:06,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:29:07,000 INFO L82 PathProgramCache]: Analyzing trace with hash -853779000, now seen corresponding path program 25 times [2019-12-07 13:29:07,000 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:29:07,000 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502424778] [2019-12-07 13:29:07,001 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:29:07,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:29:07,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:29:07,941 INFO L134 CoverageAnalysis]: Checked inductivity of 1111 backedges. 61 proven. 774 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2019-12-07 13:29:07,941 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502424778] [2019-12-07 13:29:07,942 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133197337] [2019-12-07 13:29:07,942 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6ee30319-8eb7-4e19-9c50-0c0e1826f677/bin/uautomizer/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:29:08,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:29:08,052 INFO L264 TraceCheckSpWp]: Trace formula consists of 749 conjuncts, 96 conjunts are in the unsatisfiable core [2019-12-07 13:29:08,054 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:29:08,509 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 14 treesize of output 10 [2019-12-07 13:29:08,509 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 13:29:08,513 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:29:08,513 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-12-07 13:29:08,513 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:17 [2019-12-07 13:29:11,192 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:29:11,192 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 52 [2019-12-07 13:29:11,192 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 13:29:11,208 INFO L614 ElimStorePlain]: treesize reduction 26, result has 46.9 percent of original size [2019-12-07 13:29:11,208 INFO L534 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 13:29:11,209 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:39, output treesize:8 [2019-12-07 13:29:11,263 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 13:29:11,350 INFO L134 CoverageAnalysis]: Checked inductivity of 1111 backedges. 13 proven. 822 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2019-12-07 13:29:11,350 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 13:29:11,350 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 38] total 70 [2019-12-07 13:29:11,350 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261400664] [2019-12-07 13:29:11,350 INFO L442 AbstractCegarLoop]: Interpolant automaton has 70 states [2019-12-07 13:29:11,350 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:29:11,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2019-12-07 13:29:11,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=4686, Unknown=0, NotChecked=0, Total=4830 [2019-12-07 13:29:11,351 INFO L87 Difference]: Start difference. First operand 215 states and 219 transitions. Second operand 70 states. [2019-12-07 13:29:28,712 WARN L192 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 48 [2019-12-07 13:29:29,617 WARN L192 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 50 [2019-12-07 13:29:30,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:29:30,107 INFO L93 Difference]: Finished difference Result 563 states and 568 transitions. [2019-12-07 13:29:30,107 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2019-12-07 13:29:30,107 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 204 [2019-12-07 13:29:30,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:29:30,108 INFO L225 Difference]: With dead ends: 563 [2019-12-07 13:29:30,108 INFO L226 Difference]: Without dead ends: 229 [2019-12-07 13:29:30,108 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 172 SyntacticMatches, 2 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3123 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=757, Invalid=20123, Unknown=0, NotChecked=0, Total=20880 [2019-12-07 13:29:30,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2019-12-07 13:29:30,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 223. [2019-12-07 13:29:30,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2019-12-07 13:29:30,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 227 transitions. [2019-12-07 13:29:30,110 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 227 transitions. Word has length 204 [2019-12-07 13:29:30,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:29:30,111 INFO L462 AbstractCegarLoop]: Abstraction has 223 states and 227 transitions. [2019-12-07 13:29:30,111 INFO L463 AbstractCegarLoop]: Interpolant automaton has 70 states. [2019-12-07 13:29:30,111 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 227 transitions. [2019-12-07 13:29:30,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2019-12-07 13:29:30,111 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:29:30,111 INFO L410 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:29:30,312 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:29:30,312 INFO L410 AbstractCegarLoop]: === Iteration 57 === [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]=== [2019-12-07 13:29:30,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:29:30,313 INFO L82 PathProgramCache]: Analyzing trace with hash -5993918, now seen corresponding path program 26 times [2019-12-07 13:29:30,313 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:29:30,314 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118405939] [2019-12-07 13:29:30,314 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:29:30,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:29:30,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:29:30,859 INFO L134 CoverageAnalysis]: Checked inductivity of 1209 backedges. 278 proven. 606 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2019-12-07 13:29:30,860 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118405939] [2019-12-07 13:29:30,860 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835771973] [2019-12-07 13:29:30,860 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6ee30319-8eb7-4e19-9c50-0c0e1826f677/bin/uautomizer/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:29:30,975 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-07 13:29:30,975 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 13:29:30,978 INFO L264 TraceCheckSpWp]: Trace formula consists of 771 conjuncts, 80 conjunts are in the unsatisfiable core [2019-12-07 13:29:30,979 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:29:31,439 INFO L134 CoverageAnalysis]: Checked inductivity of 1209 backedges. 276 proven. 608 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2019-12-07 13:29:31,439 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 13:29:31,439 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 31] total 50 [2019-12-07 13:29:31,439 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635713001] [2019-12-07 13:29:31,440 INFO L442 AbstractCegarLoop]: Interpolant automaton has 51 states [2019-12-07 13:29:31,440 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:29:31,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2019-12-07 13:29:31,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=365, Invalid=2185, Unknown=0, NotChecked=0, Total=2550 [2019-12-07 13:29:31,440 INFO L87 Difference]: Start difference. First operand 223 states and 227 transitions. Second operand 51 states. [2019-12-07 13:29:35,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:29:35,672 INFO L93 Difference]: Finished difference Result 232 states and 237 transitions. [2019-12-07 13:29:35,673 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-12-07 13:29:35,673 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 212 [2019-12-07 13:29:35,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:29:35,676 INFO L225 Difference]: With dead ends: 232 [2019-12-07 13:29:35,677 INFO L226 Difference]: Without dead ends: 230 [2019-12-07 13:29:35,678 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1307 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=534, Invalid=4022, Unknown=0, NotChecked=0, Total=4556 [2019-12-07 13:29:35,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2019-12-07 13:29:35,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 230. [2019-12-07 13:29:35,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 230 states. [2019-12-07 13:29:35,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 234 transitions. [2019-12-07 13:29:35,685 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 234 transitions. Word has length 212 [2019-12-07 13:29:35,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:29:35,686 INFO L462 AbstractCegarLoop]: Abstraction has 230 states and 234 transitions. [2019-12-07 13:29:35,686 INFO L463 AbstractCegarLoop]: Interpolant automaton has 51 states. [2019-12-07 13:29:35,686 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 234 transitions. [2019-12-07 13:29:35,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2019-12-07 13:29:35,688 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:29:35,689 INFO L410 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:29:35,890 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:29:35,890 INFO L410 AbstractCegarLoop]: === Iteration 58 === [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]=== [2019-12-07 13:29:35,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:29:35,890 INFO L82 PathProgramCache]: Analyzing trace with hash -811247747, now seen corresponding path program 27 times [2019-12-07 13:29:35,890 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:29:35,890 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516822365] [2019-12-07 13:29:35,890 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:29:35,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:29:36,778 WARN L192 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2019-12-07 13:29:37,084 WARN L192 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2019-12-07 13:29:37,764 WARN L192 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2019-12-07 13:29:40,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:29:40,525 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 14 proven. 1287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:29:40,525 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516822365] [2019-12-07 13:29:40,525 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44103147] [2019-12-07 13:29:40,525 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6ee30319-8eb7-4e19-9c50-0c0e1826f677/bin/uautomizer/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:29:43,750 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2019-12-07 13:29:43,750 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 13:29:43,758 INFO L264 TraceCheckSpWp]: Trace formula consists of 801 conjuncts, 61 conjunts are in the unsatisfiable core [2019-12-07 13:29:43,760 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:29:43,761 INFO L430 ElimStorePlain]: Different costs {0=[|v_#length_44|], 1=[|v_#valid_45|]} [2019-12-07 13:29:43,764 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-12-07 13:29:43,764 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 [2019-12-07 13:29:43,764 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 13:29:43,770 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:29:43,772 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 [2019-12-07 13:29:43,772 INFO L534 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-12-07 13:29:43,778 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:29:43,778 INFO L534 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-12-07 13:29:43,778 INFO L239 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:24, output treesize:21 [2019-12-07 13:29:43,836 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2019-12-07 13:29:43,837 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 13:29:43,842 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:29:43,842 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 13:29:43,842 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:24 [2019-12-07 13:29:43,903 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2019-12-07 13:29:43,903 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 13:29:43,909 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:29:43,909 INFO L534 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-12-07 13:29:43,910 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:38, output treesize:34 [2019-12-07 13:29:44,589 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:29:44,589 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 26 [2019-12-07 13:29:44,589 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 13:29:44,613 INFO L614 ElimStorePlain]: treesize reduction 4, result has 89.2 percent of original size [2019-12-07 13:29:44,613 INFO L534 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 13:29:44,613 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:59, output treesize:23 [2019-12-07 13:29:44,707 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 13:29:45,059 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 39 proven. 53 refuted. 0 times theorem prover too weak. 1209 trivial. 0 not checked. [2019-12-07 13:29:45,059 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 13:29:45,059 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 12] total 69 [2019-12-07 13:29:45,059 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230346222] [2019-12-07 13:29:45,060 INFO L442 AbstractCegarLoop]: Interpolant automaton has 69 states [2019-12-07 13:29:45,060 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:29:45,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2019-12-07 13:29:45,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=4515, Unknown=0, NotChecked=0, Total=4692 [2019-12-07 13:29:45,060 INFO L87 Difference]: Start difference. First operand 230 states and 234 transitions. Second operand 69 states. [2019-12-07 13:29:47,787 WARN L192 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 37 [2019-12-07 13:29:50,381 WARN L192 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 32 [2019-12-07 13:29:50,957 WARN L192 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 36 [2019-12-07 13:29:52,088 WARN L192 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 63 [2019-12-07 13:29:52,771 WARN L192 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 60 [2019-12-07 13:29:54,437 WARN L192 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 54 [2019-12-07 13:29:54,960 WARN L192 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 69 [2019-12-07 13:29:56,617 WARN L192 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 55 [2019-12-07 13:29:57,024 WARN L192 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 69 [2019-12-07 13:29:58,542 WARN L192 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 66 [2019-12-07 13:29:59,379 WARN L192 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 69 [2019-12-07 13:29:59,803 WARN L192 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 69 [2019-12-07 13:30:01,892 WARN L192 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 69 [2019-12-07 13:30:02,275 WARN L192 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 67 [2019-12-07 13:30:02,774 WARN L192 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 59 [2019-12-07 13:30:03,220 WARN L192 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 62 [2019-12-07 13:30:03,887 WARN L192 SmtUtils]: Spent 386.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 69 [2019-12-07 13:30:05,039 WARN L192 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 69 [2019-12-07 13:30:10,864 WARN L192 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 70 [2019-12-07 13:30:11,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:30:11,189 INFO L93 Difference]: Finished difference Result 401 states and 406 transitions. [2019-12-07 13:30:11,190 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2019-12-07 13:30:11,190 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 219 [2019-12-07 13:30:11,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:30:11,190 INFO L225 Difference]: With dead ends: 401 [2019-12-07 13:30:11,190 INFO L226 Difference]: Without dead ends: 0 [2019-12-07 13:30:11,191 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 418 GetRequests, 210 SyntacticMatches, 2 SemanticMatches, 206 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11962 ImplicationChecksByTransitivity, 25.2s TimeCoverageRelationStatistics Valid=2571, Invalid=40485, Unknown=0, NotChecked=0, Total=43056 [2019-12-07 13:30:11,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-12-07 13:30:11,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-12-07 13:30:11,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-12-07 13:30:11,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-12-07 13:30:11,192 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 219 [2019-12-07 13:30:11,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:30:11,192 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-12-07 13:30:11,192 INFO L463 AbstractCegarLoop]: Interpolant automaton has 69 states. [2019-12-07 13:30:11,192 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-12-07 13:30:11,192 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-12-07 13:30:11,392 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:30:11,398 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.12 01:30:11 BoogieIcfgContainer [2019-12-07 13:30:11,398 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-12-07 13:30:11,398 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-12-07 13:30:11,398 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-12-07 13:30:11,398 INFO L275 PluginConnector]: Witness Printer initialized [2019-12-07 13:30:11,398 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 01:22:09" (3/4) ... [2019-12-07 13:30:11,401 INFO L137 WitnessPrinter]: Generating witness for correct program [2019-12-07 13:30:11,405 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2019-12-07 13:30:11,405 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure cstrcmp [2019-12-07 13:30:11,405 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __bswap_32 [2019-12-07 13:30:11,405 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __bswap_64 [2019-12-07 13:30:11,405 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __uint16_identity [2019-12-07 13:30:11,405 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __uint64_identity [2019-12-07 13:30:11,405 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2019-12-07 13:30:11,405 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __uint32_identity [2019-12-07 13:30:11,409 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 18 nodes and edges [2019-12-07 13:30:11,409 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2019-12-07 13:30:11,409 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2019-12-07 13:30:11,409 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2019-12-07 13:30:11,438 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_6ee30319-8eb7-4e19-9c50-0c0e1826f677/bin/uautomizer/witness.graphml [2019-12-07 13:30:11,438 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-12-07 13:30:11,439 INFO L168 Benchmark]: Toolchain (without parser) took 482617.47 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 126.4 MB). Free memory was 940.7 MB in the beginning and 820.9 MB in the end (delta: 119.8 MB). Peak memory consumption was 246.2 MB. Max. memory is 11.5 GB. [2019-12-07 13:30:11,439 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 960.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 13:30:11,439 INFO L168 Benchmark]: CACSL2BoogieTranslator took 332.81 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 93.3 MB). Free memory was 940.7 MB in the beginning and 1.1 GB in the end (delta: -136.4 MB). Peak memory consumption was 19.6 MB. Max. memory is 11.5 GB. [2019-12-07 13:30:11,439 INFO L168 Benchmark]: Boogie Preprocessor took 38.58 ms. Allocated memory is still 1.1 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. [2019-12-07 13:30:11,439 INFO L168 Benchmark]: RCFGBuilder took 339.73 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 50.6 MB). Peak memory consumption was 50.6 MB. Max. memory is 11.5 GB. [2019-12-07 13:30:11,440 INFO L168 Benchmark]: TraceAbstraction took 481863.72 ms. Allocated memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: 33.0 MB). Free memory was 1.0 GB in the beginning and 829.7 MB in the end (delta: 191.5 MB). Peak memory consumption was 224.5 MB. Max. memory is 11.5 GB. [2019-12-07 13:30:11,440 INFO L168 Benchmark]: Witness Printer took 39.93 ms. Allocated memory is still 1.2 GB. Free memory was 829.7 MB in the beginning and 820.9 MB in the end (delta: 8.8 MB). Peak memory consumption was 8.8 MB. Max. memory is 11.5 GB. [2019-12-07 13:30:11,441 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 960.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 332.81 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 93.3 MB). Free memory was 940.7 MB in the beginning and 1.1 GB in the end (delta: -136.4 MB). Peak memory consumption was 19.6 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 38.58 ms. Allocated memory is still 1.1 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 339.73 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 50.6 MB). Peak memory consumption was 50.6 MB. Max. memory is 11.5 GB. * TraceAbstraction took 481863.72 ms. Allocated memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: 33.0 MB). Free memory was 1.0 GB in the beginning and 829.7 MB in the end (delta: 191.5 MB). Peak memory consumption was 224.5 MB. Max. memory is 11.5 GB. * Witness Printer took 39.93 ms. Allocated memory is still 1.2 GB. Free memory was 829.7 MB in the beginning and 820.9 MB in the end (delta: 8.8 MB). Peak memory consumption was 8.8 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 517]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 522]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 517]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 517]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 522]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 517]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 517]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 521]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 517]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 521]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 544]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 544]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 547]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 547]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 539]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 539]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 548]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 548]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 525]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - AllSpecificationsHoldResult: All specifications hold 19 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 9 procedures, 76 locations, 19 error locations. Result: SAFE, OverallTime: 481.8s, OverallIterations: 58, TraceHistogramMax: 14, AutomataDifference: 383.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 2461 SDtfs, 11935 SDslu, 20128 SDs, 0 SdLazy, 119328 SolverSat, 2108 SolverUnsat, 8 SolverUnknown, 0 SolverNotchecked, 99.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 6958 GetRequests, 4027 SyntacticMatches, 51 SemanticMatches, 2880 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58278 ImplicationChecksByTransitivity, 334.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=230occurred in iteration=57, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 58 MinimizatonAttempts, 421 StatesRemovedByMinimization, 38 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.5s SsaConstructionTime, 13.2s SatisfiabilityAnalysisTime, 72.3s InterpolantComputationTime, 9553 NumberOfCodeBlocks, 9474 NumberOfCodeBlocksAsserted, 245 NumberOfCheckSat, 9454 ConstructedInterpolants, 794 QuantifiedInterpolants, 17020530 SizeOfPredicates, 440 NumberOfNonLiveVariables, 17294 ConjunctsInSsa, 2146 ConjunctsInUnsatCore, 99 InterpolantComputations, 17 PerfectInterpolantSequences, 12033/31052 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...