./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/count_down-alloca-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e943c265 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdf1fb45-6f2a-40e3-bbc3-4c8984e2e4b5/bin/uautomizer-j4sWxH34Be/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdf1fb45-6f2a-40e3-bbc3-4c8984e2e4b5/bin/uautomizer-j4sWxH34Be/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdf1fb45-6f2a-40e3-bbc3-4c8984e2e4b5/bin/uautomizer-j4sWxH34Be/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdf1fb45-6f2a-40e3-bbc3-4c8984e2e4b5/bin/uautomizer-j4sWxH34Be/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/count_down-alloca-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdf1fb45-6f2a-40e3-bbc3-4c8984e2e4b5/bin/uautomizer-j4sWxH34Be/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdf1fb45-6f2a-40e3-bbc3-4c8984e2e4b5/bin/uautomizer-j4sWxH34Be --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 2407fc1341f915e07c0451c9d94952a51e657d88233cd0bc37ed2523188f0c82 ....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-e943c26 [2021-10-21 20:10:43,057 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-21 20:10:43,060 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-21 20:10:43,104 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-21 20:10:43,105 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-21 20:10:43,106 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-21 20:10:43,108 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-21 20:10:43,110 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-21 20:10:43,112 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-21 20:10:43,113 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-21 20:10:43,115 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-21 20:10:43,116 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-21 20:10:43,117 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-21 20:10:43,118 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-21 20:10:43,119 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-21 20:10:43,121 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-21 20:10:43,122 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-21 20:10:43,123 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-21 20:10:43,125 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-21 20:10:43,128 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-21 20:10:43,130 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-21 20:10:43,131 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-21 20:10:43,133 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-21 20:10:43,134 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-21 20:10:43,138 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-21 20:10:43,142 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-21 20:10:43,142 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-21 20:10:43,143 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-21 20:10:43,144 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-21 20:10:43,146 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-21 20:10:43,146 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-21 20:10:43,147 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-21 20:10:43,148 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-21 20:10:43,149 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-21 20:10:43,151 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-21 20:10:43,153 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-21 20:10:43,154 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-21 20:10:43,154 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-21 20:10:43,154 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-21 20:10:43,155 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-21 20:10:43,156 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-21 20:10:43,158 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdf1fb45-6f2a-40e3-bbc3-4c8984e2e4b5/bin/uautomizer-j4sWxH34Be/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-10-21 20:10:43,181 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-21 20:10:43,181 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-21 20:10:43,181 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-21 20:10:43,181 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-21 20:10:43,182 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-21 20:10:43,182 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-21 20:10:43,183 INFO L138 SettingsManager]: * Use SBE=true [2021-10-21 20:10:43,183 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-21 20:10:43,183 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-21 20:10:43,183 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-21 20:10:43,183 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-21 20:10:43,184 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-21 20:10:43,184 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-21 20:10:43,184 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-21 20:10:43,184 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-21 20:10:43,184 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-21 20:10:43,184 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-21 20:10:43,185 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-21 20:10:43,185 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-21 20:10:43,185 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-21 20:10:43,185 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-21 20:10:43,185 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-21 20:10:43,186 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-21 20:10:43,186 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-21 20:10:43,186 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-21 20:10:43,186 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-21 20:10:43,186 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-21 20:10:43,186 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-21 20:10:43,187 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-21 20:10:43,187 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdf1fb45-6f2a-40e3-bbc3-4c8984e2e4b5/bin/uautomizer-j4sWxH34Be/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdf1fb45-6f2a-40e3-bbc3-4c8984e2e4b5/bin/uautomizer-j4sWxH34Be Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2407fc1341f915e07c0451c9d94952a51e657d88233cd0bc37ed2523188f0c82 [2021-10-21 20:10:43,418 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-21 20:10:43,438 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-21 20:10:43,440 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-21 20:10:43,442 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-21 20:10:43,442 INFO L275 PluginConnector]: CDTParser initialized [2021-10-21 20:10:43,443 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdf1fb45-6f2a-40e3-bbc3-4c8984e2e4b5/bin/uautomizer-j4sWxH34Be/../../sv-benchmarks/c/array-memsafety/count_down-alloca-1.i [2021-10-21 20:10:43,520 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdf1fb45-6f2a-40e3-bbc3-4c8984e2e4b5/bin/uautomizer-j4sWxH34Be/data/62abf245a/1eb1244cadae4d4a857e0a288e59af9c/FLAGe1ae7cacc [2021-10-21 20:10:44,047 INFO L306 CDTParser]: Found 1 translation units. [2021-10-21 20:10:44,047 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdf1fb45-6f2a-40e3-bbc3-4c8984e2e4b5/sv-benchmarks/c/array-memsafety/count_down-alloca-1.i [2021-10-21 20:10:44,061 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdf1fb45-6f2a-40e3-bbc3-4c8984e2e4b5/bin/uautomizer-j4sWxH34Be/data/62abf245a/1eb1244cadae4d4a857e0a288e59af9c/FLAGe1ae7cacc [2021-10-21 20:10:44,368 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdf1fb45-6f2a-40e3-bbc3-4c8984e2e4b5/bin/uautomizer-j4sWxH34Be/data/62abf245a/1eb1244cadae4d4a857e0a288e59af9c [2021-10-21 20:10:44,371 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-21 20:10:44,372 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-21 20:10:44,380 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-21 20:10:44,380 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-21 20:10:44,383 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-21 20:10:44,384 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 08:10:44" (1/1) ... [2021-10-21 20:10:44,385 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@16ed30c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:10:44, skipping insertion in model container [2021-10-21 20:10:44,385 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 08:10:44" (1/1) ... [2021-10-21 20:10:44,393 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-21 20:10:44,453 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-21 20:10:44,714 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-21 20:10:44,722 INFO L203 MainTranslator]: Completed pre-run [2021-10-21 20:10:44,758 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-21 20:10:44,784 INFO L208 MainTranslator]: Completed translation [2021-10-21 20:10:44,785 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:10:44 WrapperNode [2021-10-21 20:10:44,785 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-21 20:10:44,786 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-21 20:10:44,786 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-21 20:10:44,787 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-21 20:10:44,797 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:10:44" (1/1) ... [2021-10-21 20:10:44,797 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:10:44" (1/1) ... [2021-10-21 20:10:44,809 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:10:44" (1/1) ... [2021-10-21 20:10:44,810 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:10:44" (1/1) ... [2021-10-21 20:10:44,821 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:10:44" (1/1) ... [2021-10-21 20:10:44,826 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:10:44" (1/1) ... [2021-10-21 20:10:44,829 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:10:44" (1/1) ... [2021-10-21 20:10:44,834 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-21 20:10:44,835 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-21 20:10:44,835 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-21 20:10:44,835 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-21 20:10:44,838 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:10:44" (1/1) ... [2021-10-21 20:10:44,853 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-21 20:10:44,863 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdf1fb45-6f2a-40e3-bbc3-4c8984e2e4b5/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:10:44,893 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdf1fb45-6f2a-40e3-bbc3-4c8984e2e4b5/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-21 20:10:44,920 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdf1fb45-6f2a-40e3-bbc3-4c8984e2e4b5/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-21 20:10:44,941 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-10-21 20:10:44,942 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-21 20:10:44,942 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-10-21 20:10:44,943 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-10-21 20:10:44,943 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2021-10-21 20:10:44,943 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2021-10-21 20:10:44,943 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2021-10-21 20:10:44,944 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-10-21 20:10:44,944 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-10-21 20:10:44,944 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-10-21 20:10:44,944 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-10-21 20:10:44,945 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-10-21 20:10:44,945 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-10-21 20:10:44,945 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-10-21 20:10:44,945 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-10-21 20:10:44,945 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-10-21 20:10:44,946 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-10-21 20:10:44,946 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-10-21 20:10:44,946 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-10-21 20:10:44,946 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-10-21 20:10:44,946 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-10-21 20:10:44,946 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-10-21 20:10:44,946 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-10-21 20:10:44,947 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-10-21 20:10:44,947 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-10-21 20:10:44,947 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-10-21 20:10:44,947 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2021-10-21 20:10:44,947 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2021-10-21 20:10:44,947 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2021-10-21 20:10:44,948 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-10-21 20:10:44,948 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-10-21 20:10:44,948 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-10-21 20:10:44,948 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-10-21 20:10:44,948 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-10-21 20:10:44,948 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-10-21 20:10:44,948 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-10-21 20:10:44,948 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-10-21 20:10:44,949 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-10-21 20:10:44,949 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-10-21 20:10:44,949 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-10-21 20:10:44,949 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-10-21 20:10:44,949 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-10-21 20:10:44,949 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-10-21 20:10:44,949 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-10-21 20:10:44,949 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-10-21 20:10:44,949 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-10-21 20:10:44,950 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-10-21 20:10:44,950 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-10-21 20:10:44,950 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-10-21 20:10:44,950 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-10-21 20:10:44,950 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-10-21 20:10:44,951 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-10-21 20:10:44,951 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-10-21 20:10:44,951 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-10-21 20:10:44,952 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-10-21 20:10:44,952 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-10-21 20:10:44,952 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-10-21 20:10:44,952 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-10-21 20:10:44,952 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-10-21 20:10:44,952 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-10-21 20:10:44,953 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-10-21 20:10:44,953 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-10-21 20:10:44,953 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-10-21 20:10:44,953 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-10-21 20:10:44,953 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-10-21 20:10:44,953 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-10-21 20:10:44,953 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-10-21 20:10:44,954 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-10-21 20:10:44,955 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-10-21 20:10:44,955 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-10-21 20:10:44,955 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-10-21 20:10:44,956 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-10-21 20:10:44,956 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-10-21 20:10:44,956 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-10-21 20:10:44,956 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-10-21 20:10:44,956 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-10-21 20:10:44,956 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-10-21 20:10:44,956 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-10-21 20:10:44,956 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-10-21 20:10:44,957 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-10-21 20:10:44,957 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-10-21 20:10:44,957 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-10-21 20:10:44,957 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-10-21 20:10:44,958 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-10-21 20:10:44,958 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-10-21 20:10:44,958 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-10-21 20:10:44,958 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-10-21 20:10:44,958 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-10-21 20:10:44,958 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-10-21 20:10:44,958 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-10-21 20:10:44,958 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-10-21 20:10:44,959 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-10-21 20:10:44,959 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-10-21 20:10:44,959 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-10-21 20:10:44,959 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-10-21 20:10:44,959 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-10-21 20:10:44,959 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-10-21 20:10:44,959 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-10-21 20:10:44,960 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-10-21 20:10:44,960 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-10-21 20:10:44,960 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-10-21 20:10:44,960 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-10-21 20:10:44,960 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-10-21 20:10:44,960 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-10-21 20:10:44,960 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-10-21 20:10:44,960 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-10-21 20:10:44,961 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-10-21 20:10:44,961 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-10-21 20:10:44,961 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-10-21 20:10:44,961 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-10-21 20:10:44,961 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-10-21 20:10:44,961 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-10-21 20:10:44,962 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-10-21 20:10:44,962 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-10-21 20:10:44,963 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-10-21 20:10:44,963 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-10-21 20:10:44,963 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-10-21 20:10:44,963 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-21 20:10:44,963 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-21 20:10:44,963 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-21 20:10:44,963 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-21 20:10:44,963 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-10-21 20:10:44,964 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-21 20:10:45,411 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-21 20:10:45,411 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-10-21 20:10:45,413 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 08:10:45 BoogieIcfgContainer [2021-10-21 20:10:45,413 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-21 20:10:45,415 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-21 20:10:45,415 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-21 20:10:45,420 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-21 20:10:45,420 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.10 08:10:44" (1/3) ... [2021-10-21 20:10:45,421 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4133426f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 08:10:45, skipping insertion in model container [2021-10-21 20:10:45,421 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:10:44" (2/3) ... [2021-10-21 20:10:45,422 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4133426f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 08:10:45, skipping insertion in model container [2021-10-21 20:10:45,422 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 08:10:45" (3/3) ... [2021-10-21 20:10:45,423 INFO L111 eAbstractionObserver]: Analyzing ICFG count_down-alloca-1.i [2021-10-21 20:10:45,428 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-21 20:10:45,428 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 9 error locations. [2021-10-21 20:10:45,470 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-21 20:10:45,476 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-21 20:10:45,476 INFO L340 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2021-10-21 20:10:45,522 INFO L276 IsEmpty]: Start isEmpty. Operand has 36 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 31 states have internal predecessors, (40), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-21 20:10:45,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-21 20:10:45,542 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:10:45,543 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:10:45,543 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr8ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 4 more)] === [2021-10-21 20:10:45,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:10:45,548 INFO L82 PathProgramCache]: Analyzing trace with hash -587521551, now seen corresponding path program 1 times [2021-10-21 20:10:45,557 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:10:45,557 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692848597] [2021-10-21 20:10:45,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:10:45,558 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:10:45,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:10:45,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:10:45,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:10:45,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:10:45,735 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:10:45,735 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692848597] [2021-10-21 20:10:45,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692848597] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:10:45,737 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:10:45,737 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 20:10:45,739 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479881014] [2021-10-21 20:10:45,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 20:10:45,743 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:10:45,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 20:10:45,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 20:10:45,770 INFO L87 Difference]: Start difference. First operand has 36 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 31 states have internal predecessors, (40), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:10:45,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:10:45,914 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2021-10-21 20:10:45,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 20:10:45,916 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2021-10-21 20:10:45,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:10:45,924 INFO L225 Difference]: With dead ends: 36 [2021-10-21 20:10:45,924 INFO L226 Difference]: Without dead ends: 33 [2021-10-21 20:10:45,925 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.6ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 20:10:45,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-10-21 20:10:45,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-10-21 20:10:45,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 21 states have (on average 1.619047619047619) internal successors, (34), 29 states have internal predecessors, (34), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:10:45,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2021-10-21 20:10:45,955 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 10 [2021-10-21 20:10:45,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:10:45,956 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2021-10-21 20:10:45,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:10:45,956 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2021-10-21 20:10:45,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-21 20:10:45,957 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:10:45,957 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:10:45,957 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-21 20:10:45,957 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 4 more)] === [2021-10-21 20:10:45,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:10:45,958 INFO L82 PathProgramCache]: Analyzing trace with hash -1967514850, now seen corresponding path program 1 times [2021-10-21 20:10:45,958 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:10:45,959 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524452305] [2021-10-21 20:10:45,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:10:45,959 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:10:45,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:10:46,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:10:46,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:10:46,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:10:46,030 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:10:46,031 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524452305] [2021-10-21 20:10:46,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524452305] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:10:46,031 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:10:46,031 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-21 20:10:46,032 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686687343] [2021-10-21 20:10:46,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 20:10:46,034 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:10:46,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 20:10:46,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 20:10:46,038 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:10:46,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:10:46,121 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2021-10-21 20:10:46,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 20:10:46,121 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-10-21 20:10:46,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:10:46,124 INFO L225 Difference]: With dead ends: 29 [2021-10-21 20:10:46,125 INFO L226 Difference]: Without dead ends: 29 [2021-10-21 20:10:46,125 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.1ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 20:10:46,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-10-21 20:10:46,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-10-21 20:10:46,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 25 states have internal predecessors, (30), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:10:46,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2021-10-21 20:10:46,132 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 12 [2021-10-21 20:10:46,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:10:46,132 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2021-10-21 20:10:46,133 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:10:46,133 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2021-10-21 20:10:46,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-21 20:10:46,133 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:10:46,134 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:10:46,134 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-21 20:10:46,135 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 4 more)] === [2021-10-21 20:10:46,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:10:46,136 INFO L82 PathProgramCache]: Analyzing trace with hash -1967514849, now seen corresponding path program 1 times [2021-10-21 20:10:46,136 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:10:46,137 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531283939] [2021-10-21 20:10:46,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:10:46,137 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:10:46,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:10:46,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:10:46,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:10:46,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:10:46,329 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:10:46,329 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531283939] [2021-10-21 20:10:46,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531283939] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:10:46,331 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:10:46,331 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-21 20:10:46,331 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263233501] [2021-10-21 20:10:46,332 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-21 20:10:46,333 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:10:46,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-21 20:10:46,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-21 20:10:46,334 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand has 7 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:10:46,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:10:46,445 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2021-10-21 20:10:46,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-21 20:10:46,446 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-10-21 20:10:46,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:10:46,450 INFO L225 Difference]: With dead ends: 33 [2021-10-21 20:10:46,450 INFO L226 Difference]: Without dead ends: 33 [2021-10-21 20:10:46,452 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 57.9ms TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-10-21 20:10:46,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-10-21 20:10:46,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2021-10-21 20:10:46,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 28 states have internal predecessors, (34), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:10:46,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2021-10-21 20:10:46,465 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 12 [2021-10-21 20:10:46,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:10:46,471 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2021-10-21 20:10:46,471 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:10:46,471 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2021-10-21 20:10:46,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-21 20:10:46,472 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:10:46,473 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:10:46,473 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-21 20:10:46,473 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 4 more)] === [2021-10-21 20:10:46,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:10:46,475 INFO L82 PathProgramCache]: Analyzing trace with hash 467596310, now seen corresponding path program 1 times [2021-10-21 20:10:46,475 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:10:46,476 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414749448] [2021-10-21 20:10:46,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:10:46,476 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:10:46,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:10:46,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:10:46,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:10:46,585 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:10:46,585 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:10:46,586 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414749448] [2021-10-21 20:10:46,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414749448] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:10:46,586 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491725676] [2021-10-21 20:10:46,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:10:46,587 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:10:46,587 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdf1fb45-6f2a-40e3-bbc3-4c8984e2e4b5/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:10:46,589 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdf1fb45-6f2a-40e3-bbc3-4c8984e2e4b5/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:10:46,593 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdf1fb45-6f2a-40e3-bbc3-4c8984e2e4b5/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-21 20:10:46,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:10:46,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-21 20:10:46,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:10:46,889 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:10:46,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491725676] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:10:46,890 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-21 20:10:46,890 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 8 [2021-10-21 20:10:46,891 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913851039] [2021-10-21 20:10:46,892 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-21 20:10:46,892 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:10:46,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-21 20:10:46,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-10-21 20:10:46,893 INFO L87 Difference]: Start difference. First operand 32 states and 37 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:10:46,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:10:46,920 INFO L93 Difference]: Finished difference Result 54 states and 61 transitions. [2021-10-21 20:10:46,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-21 20:10:46,921 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2021-10-21 20:10:46,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:10:46,923 INFO L225 Difference]: With dead ends: 54 [2021-10-21 20:10:46,923 INFO L226 Difference]: Without dead ends: 54 [2021-10-21 20:10:46,924 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 36.2ms TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-10-21 20:10:46,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-10-21 20:10:46,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 39. [2021-10-21 20:10:46,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 31 states have (on average 1.3548387096774193) internal successors, (42), 35 states have internal predecessors, (42), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:10:46,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2021-10-21 20:10:46,940 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 16 [2021-10-21 20:10:46,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:10:46,941 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2021-10-21 20:10:46,942 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:10:46,942 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2021-10-21 20:10:46,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-21 20:10:46,943 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:10:46,943 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:10:46,981 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdf1fb45-6f2a-40e3-bbc3-4c8984e2e4b5/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-21 20:10:47,157 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdf1fb45-6f2a-40e3-bbc3-4c8984e2e4b5/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:10:47,158 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 4 more)] === [2021-10-21 20:10:47,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:10:47,158 INFO L82 PathProgramCache]: Analyzing trace with hash 74569300, now seen corresponding path program 1 times [2021-10-21 20:10:47,158 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:10:47,158 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877281987] [2021-10-21 20:10:47,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:10:47,159 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:10:47,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:10:47,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:10:47,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:10:47,305 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:10:47,305 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:10:47,306 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877281987] [2021-10-21 20:10:47,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877281987] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:10:47,306 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944561036] [2021-10-21 20:10:47,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:10:47,307 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:10:47,307 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdf1fb45-6f2a-40e3-bbc3-4c8984e2e4b5/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:10:47,310 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdf1fb45-6f2a-40e3-bbc3-4c8984e2e4b5/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:10:47,315 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdf1fb45-6f2a-40e3-bbc3-4c8984e2e4b5/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-21 20:10:47,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:10:47,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-21 20:10:47,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:10:47,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-10-21 20:10:47,605 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:10:47,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1944561036] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:10:47,605 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:10:47,606 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 8 [2021-10-21 20:10:47,606 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409981245] [2021-10-21 20:10:47,606 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-21 20:10:47,606 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:10:47,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-21 20:10:47,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-10-21 20:10:47,608 INFO L87 Difference]: Start difference. First operand 39 states and 45 transitions. Second operand has 9 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:10:47,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:10:47,710 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2021-10-21 20:10:47,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-21 20:10:47,710 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2021-10-21 20:10:47,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:10:47,711 INFO L225 Difference]: With dead ends: 39 [2021-10-21 20:10:47,711 INFO L226 Difference]: Without dead ends: 39 [2021-10-21 20:10:47,712 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 86.2ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-10-21 20:10:47,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-10-21 20:10:47,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 36. [2021-10-21 20:10:47,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 32 states have internal predecessors, (38), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:10:47,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2021-10-21 20:10:47,716 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 16 [2021-10-21 20:10:47,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:10:47,716 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2021-10-21 20:10:47,716 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:10:47,716 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2021-10-21 20:10:47,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-21 20:10:47,717 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:10:47,717 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:10:47,755 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdf1fb45-6f2a-40e3-bbc3-4c8984e2e4b5/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-21 20:10:47,938 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdf1fb45-6f2a-40e3-bbc3-4c8984e2e4b5/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:10:47,938 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 4 more)] === [2021-10-21 20:10:47,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:10:47,939 INFO L82 PathProgramCache]: Analyzing trace with hash 1610534241, now seen corresponding path program 1 times [2021-10-21 20:10:47,939 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:10:47,939 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053184913] [2021-10-21 20:10:47,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:10:47,939 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:10:47,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:10:48,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:10:48,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:10:48,049 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:10:48,050 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:10:48,051 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053184913] [2021-10-21 20:10:48,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053184913] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:10:48,051 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352879258] [2021-10-21 20:10:48,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:10:48,052 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:10:48,052 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdf1fb45-6f2a-40e3-bbc3-4c8984e2e4b5/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:10:48,054 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdf1fb45-6f2a-40e3-bbc3-4c8984e2e4b5/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:10:48,061 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdf1fb45-6f2a-40e3-bbc3-4c8984e2e4b5/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-21 20:10:48,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:10:48,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-21 20:10:48,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:10:48,304 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:10:48,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1352879258] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:10:48,305 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:10:48,305 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 11 [2021-10-21 20:10:48,305 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081523084] [2021-10-21 20:10:48,305 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-21 20:10:48,306 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:10:48,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-21 20:10:48,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-10-21 20:10:48,307 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand has 12 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:10:48,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:10:48,455 INFO L93 Difference]: Finished difference Result 50 states and 57 transitions. [2021-10-21 20:10:48,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-21 20:10:48,456 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-10-21 20:10:48,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:10:48,456 INFO L225 Difference]: With dead ends: 50 [2021-10-21 20:10:48,456 INFO L226 Difference]: Without dead ends: 50 [2021-10-21 20:10:48,457 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 119.5ms TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-10-21 20:10:48,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-10-21 20:10:48,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 43. [2021-10-21 20:10:48,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 36 states have (on average 1.3055555555555556) internal successors, (47), 39 states have internal predecessors, (47), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:10:48,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 50 transitions. [2021-10-21 20:10:48,461 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 50 transitions. Word has length 17 [2021-10-21 20:10:48,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:10:48,461 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 50 transitions. [2021-10-21 20:10:48,462 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:10:48,462 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 50 transitions. [2021-10-21 20:10:48,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-21 20:10:48,462 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:10:48,463 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:10:48,497 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdf1fb45-6f2a-40e3-bbc3-4c8984e2e4b5/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-21 20:10:48,673 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdf1fb45-6f2a-40e3-bbc3-4c8984e2e4b5/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-10-21 20:10:48,674 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr8ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 4 more)] === [2021-10-21 20:10:48,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:10:48,674 INFO L82 PathProgramCache]: Analyzing trace with hash -1613047272, now seen corresponding path program 1 times [2021-10-21 20:10:48,674 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:10:48,675 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378872036] [2021-10-21 20:10:48,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:10:48,675 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:10:48,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:10:48,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:10:48,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:10:48,738 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-21 20:10:48,739 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:10:48,739 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378872036] [2021-10-21 20:10:48,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378872036] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:10:48,739 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:10:48,740 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-21 20:10:48,740 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963691498] [2021-10-21 20:10:48,740 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-21 20:10:48,740 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:10:48,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-21 20:10:48,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-21 20:10:48,742 INFO L87 Difference]: Start difference. First operand 43 states and 50 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:10:48,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:10:48,795 INFO L93 Difference]: Finished difference Result 44 states and 50 transitions. [2021-10-21 20:10:48,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-21 20:10:48,795 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2021-10-21 20:10:48,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:10:48,797 INFO L225 Difference]: With dead ends: 44 [2021-10-21 20:10:48,798 INFO L226 Difference]: Without dead ends: 44 [2021-10-21 20:10:48,798 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 20.1ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-21 20:10:48,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-10-21 20:10:48,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2021-10-21 20:10:48,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 36 states have (on average 1.2777777777777777) internal successors, (46), 39 states have internal predecessors, (46), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:10:48,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 49 transitions. [2021-10-21 20:10:48,810 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 49 transitions. Word has length 18 [2021-10-21 20:10:48,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:10:48,810 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 49 transitions. [2021-10-21 20:10:48,810 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:10:48,810 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 49 transitions. [2021-10-21 20:10:48,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-21 20:10:48,811 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:10:48,811 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:10:48,812 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-21 20:10:48,812 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 4 more)] === [2021-10-21 20:10:48,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:10:48,813 INFO L82 PathProgramCache]: Analyzing trace with hash 2133289012, now seen corresponding path program 1 times [2021-10-21 20:10:48,813 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:10:48,813 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798172386] [2021-10-21 20:10:48,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:10:48,814 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:10:48,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:10:48,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:10:48,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:10:48,892 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-21 20:10:48,893 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:10:48,893 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798172386] [2021-10-21 20:10:48,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798172386] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:10:48,898 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173922517] [2021-10-21 20:10:48,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:10:48,899 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:10:48,899 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdf1fb45-6f2a-40e3-bbc3-4c8984e2e4b5/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:10:48,902 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdf1fb45-6f2a-40e3-bbc3-4c8984e2e4b5/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:10:48,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdf1fb45-6f2a-40e3-bbc3-4c8984e2e4b5/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-21 20:10:49,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:10:49,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-21 20:10:49,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:10:49,122 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-21 20:10:49,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [173922517] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:10:49,124 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-21 20:10:49,124 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 8 [2021-10-21 20:10:49,124 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64650655] [2021-10-21 20:10:49,124 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-21 20:10:49,125 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:10:49,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-21 20:10:49,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-10-21 20:10:49,126 INFO L87 Difference]: Start difference. First operand 43 states and 49 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:10:49,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:10:49,157 INFO L93 Difference]: Finished difference Result 56 states and 62 transitions. [2021-10-21 20:10:49,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-21 20:10:49,157 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2021-10-21 20:10:49,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:10:49,159 INFO L225 Difference]: With dead ends: 56 [2021-10-21 20:10:49,160 INFO L226 Difference]: Without dead ends: 56 [2021-10-21 20:10:49,160 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 37.1ms TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-10-21 20:10:49,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-10-21 20:10:49,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 53. [2021-10-21 20:10:49,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 46 states have (on average 1.2391304347826086) internal successors, (57), 49 states have internal predecessors, (57), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:10:49,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 60 transitions. [2021-10-21 20:10:49,172 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 60 transitions. Word has length 21 [2021-10-21 20:10:49,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:10:49,173 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 60 transitions. [2021-10-21 20:10:49,173 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:10:49,173 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 60 transitions. [2021-10-21 20:10:49,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-21 20:10:49,175 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:10:49,175 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:10:49,214 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdf1fb45-6f2a-40e3-bbc3-4c8984e2e4b5/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-21 20:10:49,390 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdf1fb45-6f2a-40e3-bbc3-4c8984e2e4b5/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:10:49,390 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 4 more)] === [2021-10-21 20:10:49,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:10:49,391 INFO L82 PathProgramCache]: Analyzing trace with hash 853425334, now seen corresponding path program 1 times [2021-10-21 20:10:49,391 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:10:49,391 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874470119] [2021-10-21 20:10:49,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:10:49,391 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:10:49,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:10:49,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:10:49,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:10:49,459 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:10:49,460 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:10:49,462 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874470119] [2021-10-21 20:10:49,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874470119] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:10:49,462 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697372584] [2021-10-21 20:10:49,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:10:49,463 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:10:49,463 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdf1fb45-6f2a-40e3-bbc3-4c8984e2e4b5/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:10:49,464 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdf1fb45-6f2a-40e3-bbc3-4c8984e2e4b5/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:10:49,489 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdf1fb45-6f2a-40e3-bbc3-4c8984e2e4b5/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-21 20:10:49,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:10:49,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-21 20:10:49,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:10:49,714 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:10:49,714 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [697372584] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:10:49,714 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:10:49,715 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-10-21 20:10:49,715 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367167070] [2021-10-21 20:10:49,715 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-21 20:10:49,715 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:10:49,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-21 20:10:49,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-10-21 20:10:49,716 INFO L87 Difference]: Start difference. First operand 53 states and 60 transitions. Second operand has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:10:49,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:10:49,863 INFO L93 Difference]: Finished difference Result 73 states and 83 transitions. [2021-10-21 20:10:49,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-21 20:10:49,863 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2021-10-21 20:10:49,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:10:49,867 INFO L225 Difference]: With dead ends: 73 [2021-10-21 20:10:49,867 INFO L226 Difference]: Without dead ends: 73 [2021-10-21 20:10:49,868 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 83.8ms TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-10-21 20:10:49,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-10-21 20:10:49,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 57. [2021-10-21 20:10:49,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 50 states have (on average 1.26) internal successors, (63), 53 states have internal predecessors, (63), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:10:49,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 66 transitions. [2021-10-21 20:10:49,888 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 66 transitions. Word has length 21 [2021-10-21 20:10:49,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:10:49,889 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 66 transitions. [2021-10-21 20:10:49,889 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:10:49,889 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 66 transitions. [2021-10-21 20:10:49,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-21 20:10:49,890 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:10:49,890 INFO L512 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] [2021-10-21 20:10:49,927 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdf1fb45-6f2a-40e3-bbc3-4c8984e2e4b5/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-21 20:10:50,090 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdf1fb45-6f2a-40e3-bbc3-4c8984e2e4b5/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:10:50,091 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr8ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 4 more)] === [2021-10-21 20:10:50,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:10:50,091 INFO L82 PathProgramCache]: Analyzing trace with hash 1707448741, now seen corresponding path program 1 times [2021-10-21 20:10:50,091 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:10:50,091 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788448136] [2021-10-21 20:10:50,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:10:50,092 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:10:50,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:10:50,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:10:50,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:10:50,147 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-21 20:10:50,147 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:10:50,148 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788448136] [2021-10-21 20:10:50,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788448136] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:10:50,148 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:10:50,148 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 20:10:50,148 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992956078] [2021-10-21 20:10:50,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-21 20:10:50,149 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:10:50,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-21 20:10:50,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-21 20:10:50,150 INFO L87 Difference]: Start difference. First operand 57 states and 66 transitions. Second operand has 5 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:10:50,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:10:50,184 INFO L93 Difference]: Finished difference Result 56 states and 65 transitions. [2021-10-21 20:10:50,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 20:10:50,185 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2021-10-21 20:10:50,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:10:50,186 INFO L225 Difference]: With dead ends: 56 [2021-10-21 20:10:50,186 INFO L226 Difference]: Without dead ends: 37 [2021-10-21 20:10:50,186 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.9ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-21 20:10:50,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-10-21 20:10:50,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-10-21 20:10:50,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 33 states have internal predecessors, (39), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:10:50,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2021-10-21 20:10:50,189 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 22 [2021-10-21 20:10:50,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:10:50,190 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2021-10-21 20:10:50,190 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:10:50,190 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2021-10-21 20:10:50,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-21 20:10:50,192 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:10:50,192 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:10:50,193 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-10-21 20:10:50,193 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 4 more)] === [2021-10-21 20:10:50,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:10:50,193 INFO L82 PathProgramCache]: Analyzing trace with hash 1009154207, now seen corresponding path program 2 times [2021-10-21 20:10:50,194 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:10:50,194 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114093338] [2021-10-21 20:10:50,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:10:50,194 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:10:50,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:10:50,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:10:50,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:10:50,330 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:10:50,330 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:10:50,330 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114093338] [2021-10-21 20:10:50,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114093338] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:10:50,330 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036472066] [2021-10-21 20:10:50,330 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 20:10:50,331 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:10:50,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdf1fb45-6f2a-40e3-bbc3-4c8984e2e4b5/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:10:50,335 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdf1fb45-6f2a-40e3-bbc3-4c8984e2e4b5/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:10:50,335 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdf1fb45-6f2a-40e3-bbc3-4c8984e2e4b5/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-21 20:10:50,486 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 20:10:50,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:10:50,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-21 20:10:50,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:10:50,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-10-21 20:10:50,715 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-21 20:10:50,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2036472066] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:10:50,716 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:10:50,716 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 12 [2021-10-21 20:10:50,716 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416728121] [2021-10-21 20:10:50,717 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-21 20:10:50,717 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:10:50,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-21 20:10:50,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-10-21 20:10:50,718 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand has 13 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:10:50,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:10:50,936 INFO L93 Difference]: Finished difference Result 36 states and 41 transitions. [2021-10-21 20:10:50,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-21 20:10:50,937 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2021-10-21 20:10:50,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:10:50,937 INFO L225 Difference]: With dead ends: 36 [2021-10-21 20:10:50,937 INFO L226 Difference]: Without dead ends: 0 [2021-10-21 20:10:50,938 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 184.9ms TimeCoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2021-10-21 20:10:50,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-21 20:10:50,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-21 20:10:50,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:10:50,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-21 20:10:50,939 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 25 [2021-10-21 20:10:50,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:10:50,939 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-21 20:10:50,939 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:10:50,939 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-21 20:10:50,939 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-21 20:10:50,941 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr0REQUIRES_VIOLATION [2021-10-21 20:10:50,942 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr1REQUIRES_VIOLATION [2021-10-21 20:10:50,942 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr2REQUIRES_VIOLATION [2021-10-21 20:10:50,942 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr3REQUIRES_VIOLATION [2021-10-21 20:10:50,942 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr4REQUIRES_VIOLATION [2021-10-21 20:10:50,942 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr5REQUIRES_VIOLATION [2021-10-21 20:10:50,942 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr6REQUIRES_VIOLATION [2021-10-21 20:10:50,942 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr7REQUIRES_VIOLATION [2021-10-21 20:10:50,942 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr8ENSURES_VIOLATIONMEMORY_LEAK [2021-10-21 20:10:50,964 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdf1fb45-6f2a-40e3-bbc3-4c8984e2e4b5/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-10-21 20:10:51,145 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdf1fb45-6f2a-40e3-bbc3-4c8984e2e4b5/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:10:51,150 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-21 20:10:51,152 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.10 08:10:51 BoogieIcfgContainer [2021-10-21 20:10:51,152 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-21 20:10:51,152 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-21 20:10:51,152 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-21 20:10:51,153 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-21 20:10:51,153 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 08:10:45" (3/4) ... [2021-10-21 20:10:51,155 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-21 20:10:51,160 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2021-10-21 20:10:51,161 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __bswap_32 [2021-10-21 20:10:51,161 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __bswap_64 [2021-10-21 20:10:51,161 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __uint16_identity [2021-10-21 20:10:51,161 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __uint64_identity [2021-10-21 20:10:51,161 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2021-10-21 20:10:51,162 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __uint32_identity [2021-10-21 20:10:51,165 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2021-10-21 20:10:51,165 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2021-10-21 20:10:51,166 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-21 20:10:51,166 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-21 20:10:51,207 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdf1fb45-6f2a-40e3-bbc3-4c8984e2e4b5/bin/uautomizer-j4sWxH34Be/witness.graphml [2021-10-21 20:10:51,210 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-21 20:10:51,212 INFO L168 Benchmark]: Toolchain (without parser) took 6838.84 ms. Allocated memory was 119.5 MB in the beginning and 144.7 MB in the end (delta: 25.2 MB). Free memory was 87.5 MB in the beginning and 78.5 MB in the end (delta: 9.0 MB). Peak memory consumption was 32.3 MB. Max. memory is 16.1 GB. [2021-10-21 20:10:51,212 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 90.2 MB. Free memory is still 46.1 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-21 20:10:51,213 INFO L168 Benchmark]: CACSL2BoogieTranslator took 405.95 ms. Allocated memory is still 119.5 MB. Free memory was 87.3 MB in the beginning and 89.9 MB in the end (delta: -2.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-21 20:10:51,213 INFO L168 Benchmark]: Boogie Preprocessor took 47.74 ms. Allocated memory is still 119.5 MB. Free memory was 89.9 MB in the beginning and 87.5 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-21 20:10:51,214 INFO L168 Benchmark]: RCFGBuilder took 578.71 ms. Allocated memory is still 119.5 MB. Free memory was 87.5 MB in the beginning and 69.4 MB in the end (delta: 18.1 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. [2021-10-21 20:10:51,215 INFO L168 Benchmark]: TraceAbstraction took 5736.89 ms. Allocated memory was 119.5 MB in the beginning and 144.7 MB in the end (delta: 25.2 MB). Free memory was 69.0 MB in the beginning and 81.5 MB in the end (delta: -12.5 MB). Peak memory consumption was 13.9 MB. Max. memory is 16.1 GB. [2021-10-21 20:10:51,215 INFO L168 Benchmark]: Witness Printer took 58.23 ms. Allocated memory is still 144.7 MB. Free memory was 81.5 MB in the beginning and 78.5 MB in the end (delta: 3.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-21 20:10:51,217 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 90.2 MB. Free memory is still 46.1 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 405.95 ms. Allocated memory is still 119.5 MB. Free memory was 87.3 MB in the beginning and 89.9 MB in the end (delta: -2.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 47.74 ms. Allocated memory is still 119.5 MB. Free memory was 89.9 MB in the beginning and 87.5 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 578.71 ms. Allocated memory is still 119.5 MB. Free memory was 87.5 MB in the beginning and 69.4 MB in the end (delta: 18.1 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. * TraceAbstraction took 5736.89 ms. Allocated memory was 119.5 MB in the beginning and 144.7 MB in the end (delta: 25.2 MB). Free memory was 69.0 MB in the beginning and 81.5 MB in the end (delta: -12.5 MB). Peak memory consumption was 13.9 MB. Max. memory is 16.1 GB. * Witness Printer took 58.23 ms. Allocated memory is still 144.7 MB. Free memory was 81.5 MB in the beginning and 78.5 MB in the end (delta: 3.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 524]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 524]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 527]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 527]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 528]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 528]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 528]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 528]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 512]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 8 procedures, 51 locations, 9 error locations. Started 1 CEGAR loops. OverallTime: 5682.0ms, OverallIterations: 11, TraceHistogramMax: 2, EmptinessCheckTime: 36.8ms, AutomataDifference: 1182.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 39.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 233 SDtfs, 571 SDslu, 401 SDs, 0 SdLazy, 802 SolverSat, 63 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 624.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 201 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 664.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=57occurred in iteration=9, InterpolantAutomatonStates: 71, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 106.9ms AutomataMinimizationTime, 11 MinimizatonAttempts, 46 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 54.9ms SsaConstructionTime, 220.9ms SatisfiabilityAnalysisTime, 1856.3ms InterpolantComputationTime, 306 NumberOfCodeBlocks, 306 NumberOfCodeBlocksAsserted, 18 NumberOfCheckSat, 289 ConstructedInterpolants, 0 QuantifiedInterpolants, 1547 SizeOfPredicates, 15 NumberOfNonLiveVariables, 452 ConjunctsInSsa, 43 ConjunctsInUnsatCore, 17 InterpolantComputations, 7 PerfectInterpolantSequences, 24/45 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 9 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-10-21 20:10:51,248 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdf1fb45-6f2a-40e3-bbc3-4c8984e2e4b5/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...