./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/openbsd_cbzero-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 9ad7fb26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5e3ab92-1238-400c-9b82-b33de1725701/bin/uautomizer-tBqnrhUYjU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5e3ab92-1238-400c-9b82-b33de1725701/bin/uautomizer-tBqnrhUYjU/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5e3ab92-1238-400c-9b82-b33de1725701/bin/uautomizer-tBqnrhUYjU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5e3ab92-1238-400c-9b82-b33de1725701/bin/uautomizer-tBqnrhUYjU/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/openbsd_cbzero-alloca-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5e3ab92-1238-400c-9b82-b33de1725701/bin/uautomizer-tBqnrhUYjU/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5e3ab92-1238-400c-9b82-b33de1725701/bin/uautomizer-tBqnrhUYjU --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 d759988a90bf6714578fc618630dc9d346515dfe23789cba296c3d8ccdbe3f23 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-02 22:31:11,667 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-02 22:31:11,672 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-02 22:31:11,753 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-02 22:31:11,753 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-02 22:31:11,760 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-02 22:31:11,763 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-02 22:31:11,769 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-02 22:31:11,772 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-02 22:31:11,782 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-02 22:31:11,783 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-02 22:31:11,786 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-02 22:31:11,787 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-02 22:31:11,790 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-02 22:31:11,794 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-02 22:31:11,801 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-02 22:31:11,803 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-02 22:31:11,807 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-02 22:31:11,812 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-02 22:31:11,819 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-02 22:31:11,825 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-02 22:31:11,826 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-02 22:31:11,830 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-02 22:31:11,832 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-02 22:31:11,839 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-02 22:31:11,840 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-02 22:31:11,841 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-02 22:31:11,843 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-02 22:31:11,844 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-02 22:31:11,846 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-02 22:31:11,847 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-02 22:31:11,848 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-02 22:31:11,850 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-02 22:31:11,852 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-02 22:31:11,854 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-02 22:31:11,855 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-02 22:31:11,856 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-02 22:31:11,856 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-02 22:31:11,857 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-02 22:31:11,858 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-02 22:31:11,859 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-02 22:31:11,863 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5e3ab92-1238-400c-9b82-b33de1725701/bin/uautomizer-tBqnrhUYjU/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-11-02 22:31:11,922 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-02 22:31:11,922 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-02 22:31:11,923 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-02 22:31:11,923 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-02 22:31:11,932 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-02 22:31:11,933 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-02 22:31:11,934 INFO L138 SettingsManager]: * Use SBE=true [2021-11-02 22:31:11,934 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-02 22:31:11,934 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-02 22:31:11,935 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-02 22:31:11,936 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-02 22:31:11,937 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-02 22:31:11,937 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-02 22:31:11,937 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-02 22:31:11,938 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-02 22:31:11,938 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-02 22:31:11,938 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-02 22:31:11,938 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-02 22:31:11,939 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-02 22:31:11,939 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-02 22:31:11,939 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-02 22:31:11,940 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-02 22:31:11,940 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-02 22:31:11,940 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 22:31:11,941 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-02 22:31:11,941 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-02 22:31:11,941 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-02 22:31:11,942 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-02 22:31:11,942 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-02 22:31:11,945 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_e5e3ab92-1238-400c-9b82-b33de1725701/bin/uautomizer-tBqnrhUYjU/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5e3ab92-1238-400c-9b82-b33de1725701/bin/uautomizer-tBqnrhUYjU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d759988a90bf6714578fc618630dc9d346515dfe23789cba296c3d8ccdbe3f23 [2021-11-02 22:31:12,233 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-02 22:31:12,256 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-02 22:31:12,259 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-02 22:31:12,260 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-02 22:31:12,261 INFO L275 PluginConnector]: CDTParser initialized [2021-11-02 22:31:12,262 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5e3ab92-1238-400c-9b82-b33de1725701/bin/uautomizer-tBqnrhUYjU/../../sv-benchmarks/c/array-memsafety/openbsd_cbzero-alloca-2.i [2021-11-02 22:31:12,356 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5e3ab92-1238-400c-9b82-b33de1725701/bin/uautomizer-tBqnrhUYjU/data/70c6c5193/a987bc99835a4af1a5e0fceb4196da27/FLAGbac0cd88e [2021-11-02 22:31:13,030 INFO L306 CDTParser]: Found 1 translation units. [2021-11-02 22:31:13,031 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5e3ab92-1238-400c-9b82-b33de1725701/sv-benchmarks/c/array-memsafety/openbsd_cbzero-alloca-2.i [2021-11-02 22:31:13,055 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5e3ab92-1238-400c-9b82-b33de1725701/bin/uautomizer-tBqnrhUYjU/data/70c6c5193/a987bc99835a4af1a5e0fceb4196da27/FLAGbac0cd88e [2021-11-02 22:31:13,345 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5e3ab92-1238-400c-9b82-b33de1725701/bin/uautomizer-tBqnrhUYjU/data/70c6c5193/a987bc99835a4af1a5e0fceb4196da27 [2021-11-02 22:31:13,348 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-02 22:31:13,352 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-11-02 22:31:13,354 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-02 22:31:13,356 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-02 22:31:13,370 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-02 22:31:13,371 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 10:31:13" (1/1) ... [2021-11-02 22:31:13,372 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@21401435 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:31:13, skipping insertion in model container [2021-11-02 22:31:13,375 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 10:31:13" (1/1) ... [2021-11-02 22:31:13,384 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-02 22:31:13,460 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-02 22:31:13,952 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 22:31:13,968 INFO L203 MainTranslator]: Completed pre-run [2021-11-02 22:31:14,030 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 22:31:14,074 INFO L208 MainTranslator]: Completed translation [2021-11-02 22:31:14,076 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:31:14 WrapperNode [2021-11-02 22:31:14,076 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-02 22:31:14,077 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-02 22:31:14,078 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-02 22:31:14,078 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-02 22:31:14,091 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:31:14" (1/1) ... [2021-11-02 22:31:14,093 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:31:14" (1/1) ... [2021-11-02 22:31:14,108 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:31:14" (1/1) ... [2021-11-02 22:31:14,108 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:31:14" (1/1) ... [2021-11-02 22:31:14,126 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:31:14" (1/1) ... [2021-11-02 22:31:14,131 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:31:14" (1/1) ... [2021-11-02 22:31:14,135 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:31:14" (1/1) ... [2021-11-02 22:31:14,142 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-02 22:31:14,143 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-02 22:31:14,143 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-02 22:31:14,143 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-02 22:31:14,144 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:31:14" (1/1) ... [2021-11-02 22:31:14,154 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 22:31:14,172 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5e3ab92-1238-400c-9b82-b33de1725701/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:31:14,189 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5e3ab92-1238-400c-9b82-b33de1725701/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-02 22:31:14,194 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5e3ab92-1238-400c-9b82-b33de1725701/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-02 22:31:14,234 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-11-02 22:31:14,234 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-02 22:31:14,234 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-11-02 22:31:14,235 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-11-02 22:31:14,235 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2021-11-02 22:31:14,235 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2021-11-02 22:31:14,235 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2021-11-02 22:31:14,235 INFO L138 BoogieDeclarations]: Found implementation of procedure cbzero [2021-11-02 22:31:14,235 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-11-02 22:31:14,235 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-11-02 22:31:14,236 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-11-02 22:31:14,236 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-11-02 22:31:14,236 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-11-02 22:31:14,236 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-11-02 22:31:14,236 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-11-02 22:31:14,236 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-11-02 22:31:14,237 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-11-02 22:31:14,237 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-11-02 22:31:14,237 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-11-02 22:31:14,237 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-11-02 22:31:14,237 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-11-02 22:31:14,237 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-11-02 22:31:14,238 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-11-02 22:31:14,238 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-11-02 22:31:14,238 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-11-02 22:31:14,238 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-11-02 22:31:14,238 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-11-02 22:31:14,238 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2021-11-02 22:31:14,239 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2021-11-02 22:31:14,239 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2021-11-02 22:31:14,239 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-11-02 22:31:14,239 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-11-02 22:31:14,240 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-11-02 22:31:14,240 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-11-02 22:31:14,240 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-11-02 22:31:14,240 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-11-02 22:31:14,240 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-11-02 22:31:14,240 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-11-02 22:31:14,241 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-11-02 22:31:14,241 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-11-02 22:31:14,241 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-11-02 22:31:14,241 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-11-02 22:31:14,241 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-11-02 22:31:14,241 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-11-02 22:31:14,242 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-11-02 22:31:14,242 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-11-02 22:31:14,242 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-11-02 22:31:14,242 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-11-02 22:31:14,243 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-11-02 22:31:14,243 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-11-02 22:31:14,243 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-11-02 22:31:14,243 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-11-02 22:31:14,243 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-11-02 22:31:14,245 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-11-02 22:31:14,245 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-11-02 22:31:14,245 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-11-02 22:31:14,246 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-11-02 22:31:14,246 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-11-02 22:31:14,246 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-11-02 22:31:14,246 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-11-02 22:31:14,246 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-11-02 22:31:14,246 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-11-02 22:31:14,247 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-11-02 22:31:14,247 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-11-02 22:31:14,247 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-11-02 22:31:14,247 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-11-02 22:31:14,248 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-11-02 22:31:14,248 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-11-02 22:31:14,250 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-11-02 22:31:14,250 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-11-02 22:31:14,251 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-11-02 22:31:14,252 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-11-02 22:31:14,252 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-11-02 22:31:14,252 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-11-02 22:31:14,252 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-11-02 22:31:14,252 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-11-02 22:31:14,252 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-11-02 22:31:14,253 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-11-02 22:31:14,253 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-11-02 22:31:14,253 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-11-02 22:31:14,253 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-11-02 22:31:14,253 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-11-02 22:31:14,253 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-11-02 22:31:14,253 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-11-02 22:31:14,253 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-11-02 22:31:14,254 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-11-02 22:31:14,254 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-11-02 22:31:14,254 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-11-02 22:31:14,254 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-11-02 22:31:14,254 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-11-02 22:31:14,254 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-11-02 22:31:14,254 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-11-02 22:31:14,254 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-11-02 22:31:14,255 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-11-02 22:31:14,255 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-11-02 22:31:14,255 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-11-02 22:31:14,255 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-11-02 22:31:14,255 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-11-02 22:31:14,255 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-11-02 22:31:14,255 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-11-02 22:31:14,255 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-11-02 22:31:14,256 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-11-02 22:31:14,256 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-11-02 22:31:14,256 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-11-02 22:31:14,256 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-11-02 22:31:14,256 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-11-02 22:31:14,256 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-11-02 22:31:14,256 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-11-02 22:31:14,256 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-11-02 22:31:14,256 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-11-02 22:31:14,257 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-11-02 22:31:14,257 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-11-02 22:31:14,257 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-11-02 22:31:14,257 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-11-02 22:31:14,257 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-11-02 22:31:14,257 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-11-02 22:31:14,258 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-11-02 22:31:14,258 INFO L130 BoogieDeclarations]: Found specification of procedure cbzero [2021-11-02 22:31:14,258 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-02 22:31:14,258 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-11-02 22:31:14,258 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-02 22:31:14,258 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-02 22:31:14,259 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-11-02 22:31:14,259 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-02 22:31:14,259 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-02 22:31:14,747 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-02 22:31:14,747 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-02 22:31:14,749 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 10:31:14 BoogieIcfgContainer [2021-11-02 22:31:14,750 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-02 22:31:14,752 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-02 22:31:14,752 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-02 22:31:14,756 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-02 22:31:14,756 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 10:31:13" (1/3) ... [2021-11-02 22:31:14,757 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5441ddba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 10:31:14, skipping insertion in model container [2021-11-02 22:31:14,757 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:31:14" (2/3) ... [2021-11-02 22:31:14,758 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5441ddba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 10:31:14, skipping insertion in model container [2021-11-02 22:31:14,758 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 10:31:14" (3/3) ... [2021-11-02 22:31:14,759 INFO L111 eAbstractionObserver]: Analyzing ICFG openbsd_cbzero-alloca-2.i [2021-11-02 22:31:14,765 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-02 22:31:14,766 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2021-11-02 22:31:14,812 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-02 22:31:14,818 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-02 22:31:14,819 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-11-02 22:31:14,833 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 18 states have internal predecessors, (23), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-02 22:31:14,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-02 22:31:14,841 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:31:14,842 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:31:14,843 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ENSURES_VIOLATIONMEMORY_LEAK === [cbzeroErr0REQUIRES_VIOLATION, cbzeroErr1REQUIRES_VIOLATION, mainErr0ENSURES_VIOLATIONMEMORY_LEAK] === [2021-11-02 22:31:14,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:31:14,849 INFO L85 PathProgramCache]: Analyzing trace with hash 1664038058, now seen corresponding path program 1 times [2021-11-02 22:31:14,858 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:31:14,859 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493770754] [2021-11-02 22:31:14,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:31:14,860 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:31:14,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:31:15,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:31:15,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:31:15,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:31:15,109 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:31:15,110 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493770754] [2021-11-02 22:31:15,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493770754] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:31:15,111 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:31:15,112 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-02 22:31:15,114 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965210855] [2021-11-02 22:31:15,120 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 22:31:15,121 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:31:15,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 22:31:15,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:31:15,150 INFO L87 Difference]: Start difference. First operand has 25 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 18 states have internal predecessors, (23), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 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) [2021-11-02 22:31:15,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:31:15,368 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2021-11-02 22:31:15,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-02 22:31:15,370 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 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 [2021-11-02 22:31:15,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:31:15,380 INFO L225 Difference]: With dead ends: 28 [2021-11-02 22:31:15,380 INFO L226 Difference]: Without dead ends: 23 [2021-11-02 22:31:15,383 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-02 22:31:15,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-11-02 22:31:15,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2021-11-02 22:31:15,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 16 states have internal predecessors, (19), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-02 22:31:15,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2021-11-02 22:31:15,425 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 10 [2021-11-02 22:31:15,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:31:15,426 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2021-11-02 22:31:15,427 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 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) [2021-11-02 22:31:15,427 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2021-11-02 22:31:15,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-02 22:31:15,428 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:31:15,429 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:31:15,429 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-02 22:31:15,430 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting cbzeroErr0REQUIRES_VIOLATION === [cbzeroErr0REQUIRES_VIOLATION, cbzeroErr1REQUIRES_VIOLATION, mainErr0ENSURES_VIOLATIONMEMORY_LEAK] === [2021-11-02 22:31:15,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:31:15,432 INFO L85 PathProgramCache]: Analyzing trace with hash 469198071, now seen corresponding path program 1 times [2021-11-02 22:31:15,432 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:31:15,433 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435910643] [2021-11-02 22:31:15,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:31:15,433 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:31:15,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:31:15,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:31:15,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:31:15,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:31:15,622 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:31:15,623 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435910643] [2021-11-02 22:31:15,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435910643] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:31:15,626 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:31:15,626 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-02 22:31:15,627 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138455709] [2021-11-02 22:31:15,628 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-02 22:31:15,628 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:31:15,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-02 22:31:15,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-02 22:31:15,636 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 7 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:31:15,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:31:15,801 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2021-11-02 22:31:15,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-02 22:31:15,802 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (3), 3 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 14 [2021-11-02 22:31:15,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:31:15,804 INFO L225 Difference]: With dead ends: 21 [2021-11-02 22:31:15,804 INFO L226 Difference]: Without dead ends: 21 [2021-11-02 22:31:15,807 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-11-02 22:31:15,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-11-02 22:31:15,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-11-02 22:31:15,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 15 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-02 22:31:15,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2021-11-02 22:31:15,814 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 14 [2021-11-02 22:31:15,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:31:15,816 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2021-11-02 22:31:15,817 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:31:15,817 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2021-11-02 22:31:15,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-02 22:31:15,818 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:31:15,818 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:31:15,818 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-02 22:31:15,819 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting cbzeroErr1REQUIRES_VIOLATION === [cbzeroErr0REQUIRES_VIOLATION, cbzeroErr1REQUIRES_VIOLATION, mainErr0ENSURES_VIOLATIONMEMORY_LEAK] === [2021-11-02 22:31:15,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:31:15,820 INFO L85 PathProgramCache]: Analyzing trace with hash 469198072, now seen corresponding path program 1 times [2021-11-02 22:31:15,820 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:31:15,820 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085843437] [2021-11-02 22:31:15,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:31:15,821 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:31:15,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:31:16,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:31:16,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:31:16,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:31:16,029 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:31:16,030 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085843437] [2021-11-02 22:31:16,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085843437] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:31:16,030 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:31:16,031 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-02 22:31:16,031 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114184435] [2021-11-02 22:31:16,032 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-02 22:31:16,032 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:31:16,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-02 22:31:16,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-02 22:31:16,033 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand has 8 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:31:16,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:31:16,216 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2021-11-02 22:31:16,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-02 22:31:16,217 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 2 states have call successors, (3), 3 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 14 [2021-11-02 22:31:16,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:31:16,220 INFO L225 Difference]: With dead ends: 27 [2021-11-02 22:31:16,221 INFO L226 Difference]: Without dead ends: 27 [2021-11-02 22:31:16,221 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-11-02 22:31:16,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-11-02 22:31:16,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 24. [2021-11-02 22:31:16,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 18 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-02 22:31:16,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2021-11-02 22:31:16,228 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 14 [2021-11-02 22:31:16,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:31:16,229 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2021-11-02 22:31:16,229 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:31:16,229 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2021-11-02 22:31:16,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-02 22:31:16,231 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:31:16,231 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:31:16,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-02 22:31:16,231 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ENSURES_VIOLATIONMEMORY_LEAK === [cbzeroErr0REQUIRES_VIOLATION, cbzeroErr1REQUIRES_VIOLATION, mainErr0ENSURES_VIOLATIONMEMORY_LEAK] === [2021-11-02 22:31:16,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:31:16,232 INFO L85 PathProgramCache]: Analyzing trace with hash 2054568730, now seen corresponding path program 1 times [2021-11-02 22:31:16,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:31:16,233 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231025920] [2021-11-02 22:31:16,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:31:16,233 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:31:16,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:31:16,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:31:16,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:31:16,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-02 22:31:16,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:31:16,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:31:16,364 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:31:16,364 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231025920] [2021-11-02 22:31:16,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231025920] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:31:16,365 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:31:16,365 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-02 22:31:16,366 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205384718] [2021-11-02 22:31:16,366 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-02 22:31:16,367 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:31:16,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-02 22:31:16,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-02 22:31:16,371 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 8 states, 8 states have (on average 1.5) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-02 22:31:16,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:31:16,605 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2021-11-02 22:31:16,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-02 22:31:16,606 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.5) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2021-11-02 22:31:16,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:31:16,608 INFO L225 Difference]: With dead ends: 26 [2021-11-02 22:31:16,609 INFO L226 Difference]: Without dead ends: 24 [2021-11-02 22:31:16,610 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-11-02 22:31:16,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-11-02 22:31:16,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-11-02 22:31:16,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-02 22:31:16,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2021-11-02 22:31:16,620 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 17 [2021-11-02 22:31:16,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:31:16,621 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2021-11-02 22:31:16,622 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.5) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-02 22:31:16,622 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2021-11-02 22:31:16,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-02 22:31:16,623 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:31:16,623 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:31:16,624 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-02 22:31:16,626 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting cbzeroErr1REQUIRES_VIOLATION === [cbzeroErr0REQUIRES_VIOLATION, cbzeroErr1REQUIRES_VIOLATION, mainErr0ENSURES_VIOLATIONMEMORY_LEAK] === [2021-11-02 22:31:16,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:31:16,627 INFO L85 PathProgramCache]: Analyzing trace with hash -684268688, now seen corresponding path program 1 times [2021-11-02 22:31:16,627 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:31:16,628 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060529221] [2021-11-02 22:31:16,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:31:16,628 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:31:16,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:31:16,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:31:16,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:31:16,847 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:31:16,848 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:31:16,848 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060529221] [2021-11-02 22:31:16,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060529221] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:31:16,848 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856605458] [2021-11-02 22:31:16,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:31:16,849 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:31:16,849 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5e3ab92-1238-400c-9b82-b33de1725701/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:31:16,851 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5e3ab92-1238-400c-9b82-b33de1725701/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:31:16,869 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5e3ab92-1238-400c-9b82-b33de1725701/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-02 22:31:16,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:31:16,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-02 22:31:16,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:31:17,242 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:31:17,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1856605458] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:31:17,253 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:31:17,253 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-11-02 22:31:17,253 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24757078] [2021-11-02 22:31:17,254 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-02 22:31:17,254 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:31:17,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-02 22:31:17,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-02 22:31:17,256 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:31:17,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:31:17,456 INFO L93 Difference]: Finished difference Result 38 states and 39 transitions. [2021-11-02 22:31:17,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-02 22:31:17,457 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2021-11-02 22:31:17,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:31:17,458 INFO L225 Difference]: With dead ends: 38 [2021-11-02 22:31:17,458 INFO L226 Difference]: Without dead ends: 38 [2021-11-02 22:31:17,459 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-11-02 22:31:17,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-11-02 22:31:17,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 35. [2021-11-02 22:31:17,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 28 states have internal predecessors, (30), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-02 22:31:17,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2021-11-02 22:31:17,465 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 18 [2021-11-02 22:31:17,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:31:17,465 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2021-11-02 22:31:17,465 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:31:17,466 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2021-11-02 22:31:17,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-02 22:31:17,466 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:31:17,467 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:31:17,518 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5e3ab92-1238-400c-9b82-b33de1725701/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-02 22:31:17,682 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5e3ab92-1238-400c-9b82-b33de1725701/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:31:17,683 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting cbzeroErr1REQUIRES_VIOLATION === [cbzeroErr0REQUIRES_VIOLATION, cbzeroErr1REQUIRES_VIOLATION, mainErr0ENSURES_VIOLATIONMEMORY_LEAK] === [2021-11-02 22:31:17,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:31:17,683 INFO L85 PathProgramCache]: Analyzing trace with hash 16795890, now seen corresponding path program 1 times [2021-11-02 22:31:17,683 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:31:17,683 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134213318] [2021-11-02 22:31:17,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:31:17,684 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:31:17,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:31:18,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:31:18,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:31:18,065 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:31:18,065 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:31:18,066 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134213318] [2021-11-02 22:31:18,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134213318] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:31:18,066 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572546337] [2021-11-02 22:31:18,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:31:18,067 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:31:18,067 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5e3ab92-1238-400c-9b82-b33de1725701/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:31:18,069 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5e3ab92-1238-400c-9b82-b33de1725701/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:31:18,092 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5e3ab92-1238-400c-9b82-b33de1725701/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-02 22:31:18,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:31:18,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 40 conjunts are in the unsatisfiable core [2021-11-02 22:31:18,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:31:18,333 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 10 treesize of output 9 [2021-11-02 22:31:18,747 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:31:18,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1572546337] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:31:18,763 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:31:18,763 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-11-02 22:31:18,763 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214784956] [2021-11-02 22:31:18,764 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-02 22:31:18,764 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:31:18,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-02 22:31:18,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-11-02 22:31:18,766 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand has 20 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:31:19,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:31:19,289 INFO L93 Difference]: Finished difference Result 40 states and 43 transitions. [2021-11-02 22:31:19,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-02 22:31:19,290 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2021-11-02 22:31:19,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:31:19,292 INFO L225 Difference]: With dead ends: 40 [2021-11-02 22:31:19,292 INFO L226 Difference]: Without dead ends: 40 [2021-11-02 22:31:19,293 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=107, Invalid=649, Unknown=0, NotChecked=0, Total=756 [2021-11-02 22:31:19,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-11-02 22:31:19,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2021-11-02 22:31:19,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 32 states have internal predecessors, (35), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-02 22:31:19,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2021-11-02 22:31:19,305 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 18 [2021-11-02 22:31:19,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:31:19,305 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2021-11-02 22:31:19,307 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:31:19,307 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2021-11-02 22:31:19,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-02 22:31:19,310 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:31:19,310 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:31:19,362 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5e3ab92-1238-400c-9b82-b33de1725701/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-02 22:31:19,530 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5e3ab92-1238-400c-9b82-b33de1725701/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-02 22:31:19,530 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ENSURES_VIOLATIONMEMORY_LEAK === [cbzeroErr0REQUIRES_VIOLATION, cbzeroErr1REQUIRES_VIOLATION, mainErr0ENSURES_VIOLATIONMEMORY_LEAK] === [2021-11-02 22:31:19,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:31:19,531 INFO L85 PathProgramCache]: Analyzing trace with hash -1135310430, now seen corresponding path program 1 times [2021-11-02 22:31:19,531 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:31:19,532 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360146667] [2021-11-02 22:31:19,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:31:19,532 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:31:19,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:31:19,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:31:19,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:31:19,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-02 22:31:19,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:31:19,659 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-02 22:31:19,660 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:31:19,660 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360146667] [2021-11-02 22:31:19,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360146667] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:31:19,660 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:31:19,661 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-02 22:31:19,661 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754299748] [2021-11-02 22:31:19,661 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-02 22:31:19,661 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:31:19,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-02 22:31:19,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-02 22:31:19,662 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand has 6 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-02 22:31:19,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:31:19,727 INFO L93 Difference]: Finished difference Result 38 states and 41 transitions. [2021-11-02 22:31:19,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-02 22:31:19,727 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 21 [2021-11-02 22:31:19,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:31:19,729 INFO L225 Difference]: With dead ends: 38 [2021-11-02 22:31:19,729 INFO L226 Difference]: Without dead ends: 23 [2021-11-02 22:31:19,730 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-02 22:31:19,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-11-02 22:31:19,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-11-02 22:31:19,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 18 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:31:19,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2021-11-02 22:31:19,743 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 21 [2021-11-02 22:31:19,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:31:19,752 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2021-11-02 22:31:19,752 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-02 22:31:19,752 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2021-11-02 22:31:19,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-02 22:31:19,752 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:31:19,752 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:31:19,753 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-02 22:31:19,753 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting cbzeroErr1REQUIRES_VIOLATION === [cbzeroErr0REQUIRES_VIOLATION, cbzeroErr1REQUIRES_VIOLATION, mainErr0ENSURES_VIOLATIONMEMORY_LEAK] === [2021-11-02 22:31:19,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:31:19,753 INFO L85 PathProgramCache]: Analyzing trace with hash -2066138518, now seen corresponding path program 2 times [2021-11-02 22:31:19,754 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:31:19,754 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416531286] [2021-11-02 22:31:19,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:31:19,754 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:31:19,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:31:20,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:31:20,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:31:20,132 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:31:20,132 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:31:20,132 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416531286] [2021-11-02 22:31:20,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416531286] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:31:20,133 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747923357] [2021-11-02 22:31:20,133 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 22:31:20,133 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:31:20,134 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5e3ab92-1238-400c-9b82-b33de1725701/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:31:20,135 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5e3ab92-1238-400c-9b82-b33de1725701/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:31:20,165 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5e3ab92-1238-400c-9b82-b33de1725701/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-02 22:31:20,309 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 22:31:20,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:31:20,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 53 conjunts are in the unsatisfiable core [2021-11-02 22:31:20,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:31:20,376 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 10 treesize of output 9 [2021-11-02 22:31:20,965 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:31:20,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1747923357] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:31:20,965 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:31:20,965 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 24 [2021-11-02 22:31:20,966 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262591494] [2021-11-02 22:31:20,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-02 22:31:20,967 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:31:20,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-02 22:31:20,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2021-11-02 22:31:20,968 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand has 25 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:31:21,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:31:21,882 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2021-11-02 22:31:21,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-02 22:31:21,883 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2021-11-02 22:31:21,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:31:21,883 INFO L225 Difference]: With dead ends: 27 [2021-11-02 22:31:21,884 INFO L226 Difference]: Without dead ends: 0 [2021-11-02 22:31:21,885 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=187, Invalid=1295, Unknown=0, NotChecked=0, Total=1482 [2021-11-02 22:31:21,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-11-02 22:31:21,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-11-02 22:31:21,885 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) [2021-11-02 22:31:21,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-11-02 22:31:21,886 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 22 [2021-11-02 22:31:21,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:31:21,886 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-11-02 22:31:21,887 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:31:21,887 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-11-02 22:31:21,887 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-11-02 22:31:21,890 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cbzeroErr0REQUIRES_VIOLATION [2021-11-02 22:31:21,891 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cbzeroErr1REQUIRES_VIOLATION [2021-11-02 22:31:21,891 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr0ENSURES_VIOLATIONMEMORY_LEAK [2021-11-02 22:31:21,938 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5e3ab92-1238-400c-9b82-b33de1725701/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-02 22:31:22,102 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5e3ab92-1238-400c-9b82-b33de1725701/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:31:22,106 INFO L731 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1] [2021-11-02 22:31:22,107 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-02 22:31:22,109 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.11 10:31:22 BoogieIcfgContainer [2021-11-02 22:31:22,110 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-02 22:31:22,110 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-02 22:31:22,110 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-02 22:31:22,111 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-02 22:31:22,111 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 10:31:14" (3/4) ... [2021-11-02 22:31:22,114 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-11-02 22:31:22,126 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2021-11-02 22:31:22,126 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __bswap_32 [2021-11-02 22:31:22,126 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __bswap_64 [2021-11-02 22:31:22,127 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __uint16_identity [2021-11-02 22:31:22,127 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __uint64_identity [2021-11-02 22:31:22,127 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure cbzero [2021-11-02 22:31:22,127 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2021-11-02 22:31:22,127 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __uint32_identity [2021-11-02 22:31:22,131 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 12 nodes and edges [2021-11-02 22:31:22,132 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2021-11-02 22:31:22,132 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-11-02 22:31:22,132 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-11-02 22:31:22,170 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5e3ab92-1238-400c-9b82-b33de1725701/bin/uautomizer-tBqnrhUYjU/witness.graphml [2021-11-02 22:31:22,171 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-02 22:31:22,173 INFO L168 Benchmark]: Toolchain (without parser) took 8819.51 ms. Allocated memory was 113.2 MB in the beginning and 167.8 MB in the end (delta: 54.5 MB). Free memory was 82.3 MB in the beginning and 103.1 MB in the end (delta: -20.7 MB). Peak memory consumption was 32.0 MB. Max. memory is 16.1 GB. [2021-11-02 22:31:22,173 INFO L168 Benchmark]: CDTParser took 0.31 ms. Allocated memory is still 113.2 MB. Free memory is still 66.7 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-02 22:31:22,174 INFO L168 Benchmark]: CACSL2BoogieTranslator took 722.12 ms. Allocated memory is still 113.2 MB. Free memory was 82.0 MB in the beginning and 80.8 MB in the end (delta: 1.3 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-11-02 22:31:22,174 INFO L168 Benchmark]: Boogie Preprocessor took 64.64 ms. Allocated memory is still 113.2 MB. Free memory was 80.8 MB in the beginning and 78.4 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-11-02 22:31:22,175 INFO L168 Benchmark]: RCFGBuilder took 607.14 ms. Allocated memory is still 113.2 MB. Free memory was 78.4 MB in the beginning and 61.6 MB in the end (delta: 16.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. [2021-11-02 22:31:22,176 INFO L168 Benchmark]: TraceAbstraction took 7357.71 ms. Allocated memory was 113.2 MB in the beginning and 167.8 MB in the end (delta: 54.5 MB). Free memory was 60.9 MB in the beginning and 107.1 MB in the end (delta: -46.2 MB). Peak memory consumption was 12.0 MB. Max. memory is 16.1 GB. [2021-11-02 22:31:22,176 INFO L168 Benchmark]: Witness Printer took 60.78 ms. Allocated memory is still 167.8 MB. Free memory was 106.0 MB in the beginning and 103.1 MB in the end (delta: 2.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-11-02 22:31:22,178 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31 ms. Allocated memory is still 113.2 MB. Free memory is still 66.7 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 722.12 ms. Allocated memory is still 113.2 MB. Free memory was 82.0 MB in the beginning and 80.8 MB in the end (delta: 1.3 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 64.64 ms. Allocated memory is still 113.2 MB. Free memory was 80.8 MB in the beginning and 78.4 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 607.14 ms. Allocated memory is still 113.2 MB. Free memory was 78.4 MB in the beginning and 61.6 MB in the end (delta: 16.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. * TraceAbstraction took 7357.71 ms. Allocated memory was 113.2 MB in the beginning and 167.8 MB in the end (delta: 54.5 MB). Free memory was 60.9 MB in the beginning and 107.1 MB in the end (delta: -46.2 MB). Peak memory consumption was 12.0 MB. Max. memory is 16.1 GB. * Witness Printer took 60.78 ms. Allocated memory is still 167.8 MB. Free memory was 106.0 MB in the beginning and 103.1 MB in the end (delta: 2.9 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, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 517]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 517]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 519]: 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 9 procedures, 40 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 7.2s, OverallIterations: 8, TraceHistogramMax: 3, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 2.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 133 SDtfs, 254 SDslu, 280 SDs, 0 SdLazy, 956 SolverSat, 108 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 177 GetRequests, 58 SyntacticMatches, 2 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 433 ImplicationChecksByTransitivity, 2.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=39occurred in iteration=6, InterpolantAutomatonStates: 78, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 8 MinimizatonAttempts, 8 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 2.9s InterpolantComputationTime, 192 NumberOfCodeBlocks, 192 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 181 ConstructedInterpolants, 0 QuantifiedInterpolants, 1135 SizeOfPredicates, 26 NumberOfNonLiveVariables, 327 ConjunctsInSsa, 106 ConjunctsInUnsatCore, 11 InterpolantComputations, 5 PerfectInterpolantSequences, 6/34 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 3 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-11-02 22:31:22,216 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5e3ab92-1238-400c-9b82-b33de1725701/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE