./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/strreplace-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b2eff8ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0414e50f-624b-4373-895e-2ea340b1c29e/bin/uautomizer-UnR33cPsHg/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0414e50f-624b-4373-895e-2ea340b1c29e/bin/uautomizer-UnR33cPsHg/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0414e50f-624b-4373-895e-2ea340b1c29e/bin/uautomizer-UnR33cPsHg/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0414e50f-624b-4373-895e-2ea340b1c29e/bin/uautomizer-UnR33cPsHg/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/strreplace-alloca-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0414e50f-624b-4373-895e-2ea340b1c29e/bin/uautomizer-UnR33cPsHg/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0414e50f-624b-4373-895e-2ea340b1c29e/bin/uautomizer-UnR33cPsHg --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 961e7f6fbd61acd9d4f1771460dcf26fd486b3de35e5e0e3ca8e6e03bda0fabc .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-b2eff8b [2021-10-28 09:07:41,847 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-28 09:07:41,849 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-28 09:07:41,883 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-28 09:07:41,884 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-28 09:07:41,885 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-28 09:07:41,887 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-28 09:07:41,890 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-28 09:07:41,892 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-28 09:07:41,893 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-28 09:07:41,894 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-28 09:07:41,896 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-28 09:07:41,897 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-28 09:07:41,898 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-28 09:07:41,900 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-28 09:07:41,901 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-28 09:07:41,903 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-28 09:07:41,904 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-28 09:07:41,906 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-28 09:07:41,909 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-28 09:07:41,911 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-28 09:07:41,912 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-28 09:07:41,914 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-28 09:07:41,915 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-28 09:07:41,919 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-28 09:07:41,920 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-28 09:07:41,920 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-28 09:07:41,921 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-28 09:07:41,922 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-28 09:07:41,923 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-28 09:07:41,924 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-28 09:07:41,925 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-28 09:07:41,926 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-28 09:07:41,927 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-28 09:07:41,928 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-28 09:07:41,928 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-28 09:07:41,929 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-28 09:07:41,930 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-28 09:07:41,930 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-28 09:07:41,932 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-28 09:07:41,932 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-28 09:07:41,933 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0414e50f-624b-4373-895e-2ea340b1c29e/bin/uautomizer-UnR33cPsHg/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-10-28 09:07:41,958 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-28 09:07:41,959 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-28 09:07:41,959 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-28 09:07:41,959 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-28 09:07:41,961 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-28 09:07:41,961 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-28 09:07:41,961 INFO L138 SettingsManager]: * Use SBE=true [2021-10-28 09:07:41,961 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-28 09:07:41,962 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-28 09:07:41,962 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-28 09:07:41,962 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-28 09:07:41,963 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-28 09:07:41,963 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-28 09:07:41,963 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-28 09:07:41,963 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-28 09:07:41,964 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-28 09:07:41,964 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-28 09:07:41,964 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-28 09:07:41,964 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-28 09:07:41,965 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-28 09:07:41,965 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-28 09:07:41,965 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-28 09:07:41,965 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-28 09:07:41,966 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 09:07:41,966 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-28 09:07:41,966 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-28 09:07:41,966 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-28 09:07:41,967 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-28 09:07:41,967 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-28 09:07:41,967 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_0414e50f-624b-4373-895e-2ea340b1c29e/bin/uautomizer-UnR33cPsHg/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0414e50f-624b-4373-895e-2ea340b1c29e/bin/uautomizer-UnR33cPsHg Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 961e7f6fbd61acd9d4f1771460dcf26fd486b3de35e5e0e3ca8e6e03bda0fabc [2021-10-28 09:07:42,254 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-28 09:07:42,278 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-28 09:07:42,281 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-28 09:07:42,283 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-28 09:07:42,283 INFO L275 PluginConnector]: CDTParser initialized [2021-10-28 09:07:42,284 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0414e50f-624b-4373-895e-2ea340b1c29e/bin/uautomizer-UnR33cPsHg/../../sv-benchmarks/c/array-memsafety/strreplace-alloca-2.i [2021-10-28 09:07:42,380 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0414e50f-624b-4373-895e-2ea340b1c29e/bin/uautomizer-UnR33cPsHg/data/00cacf51f/c8672e1685834051b429e85f786470b3/FLAG51b01eb0b [2021-10-28 09:07:43,015 INFO L306 CDTParser]: Found 1 translation units. [2021-10-28 09:07:43,016 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0414e50f-624b-4373-895e-2ea340b1c29e/sv-benchmarks/c/array-memsafety/strreplace-alloca-2.i [2021-10-28 09:07:43,033 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0414e50f-624b-4373-895e-2ea340b1c29e/bin/uautomizer-UnR33cPsHg/data/00cacf51f/c8672e1685834051b429e85f786470b3/FLAG51b01eb0b [2021-10-28 09:07:43,304 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0414e50f-624b-4373-895e-2ea340b1c29e/bin/uautomizer-UnR33cPsHg/data/00cacf51f/c8672e1685834051b429e85f786470b3 [2021-10-28 09:07:43,313 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-28 09:07:43,314 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-28 09:07:43,320 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-28 09:07:43,321 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-28 09:07:43,324 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-28 09:07:43,325 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 09:07:43" (1/1) ... [2021-10-28 09:07:43,327 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f26eb69 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:07:43, skipping insertion in model container [2021-10-28 09:07:43,329 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 09:07:43" (1/1) ... [2021-10-28 09:07:43,338 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-28 09:07:43,400 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-28 09:07:43,768 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 09:07:43,783 INFO L203 MainTranslator]: Completed pre-run [2021-10-28 09:07:43,842 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 09:07:43,880 INFO L208 MainTranslator]: Completed translation [2021-10-28 09:07:43,881 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:07:43 WrapperNode [2021-10-28 09:07:43,881 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-28 09:07:43,882 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-28 09:07:43,882 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-28 09:07:43,882 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-28 09:07:43,893 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:07:43" (1/1) ... [2021-10-28 09:07:43,896 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:07:43" (1/1) ... [2021-10-28 09:07:43,920 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:07:43" (1/1) ... [2021-10-28 09:07:43,921 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:07:43" (1/1) ... [2021-10-28 09:07:43,946 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:07:43" (1/1) ... [2021-10-28 09:07:43,953 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:07:43" (1/1) ... [2021-10-28 09:07:43,961 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:07:43" (1/1) ... [2021-10-28 09:07:43,975 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-28 09:07:43,980 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-28 09:07:43,980 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-28 09:07:43,981 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-28 09:07:43,981 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:07:43" (1/1) ... [2021-10-28 09:07:43,989 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 09:07:44,000 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0414e50f-624b-4373-895e-2ea340b1c29e/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:07:44,017 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0414e50f-624b-4373-895e-2ea340b1c29e/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-28 09:07:44,048 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0414e50f-624b-4373-895e-2ea340b1c29e/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-28 09:07:44,065 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-10-28 09:07:44,065 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-28 09:07:44,066 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-10-28 09:07:44,066 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-10-28 09:07:44,066 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2021-10-28 09:07:44,067 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2021-10-28 09:07:44,067 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2021-10-28 09:07:44,068 INFO L138 BoogieDeclarations]: Found implementation of procedure cstrreplace [2021-10-28 09:07:44,068 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-10-28 09:07:44,068 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-10-28 09:07:44,069 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-10-28 09:07:44,069 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-10-28 09:07:44,070 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-10-28 09:07:44,070 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-10-28 09:07:44,070 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-10-28 09:07:44,070 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-10-28 09:07:44,071 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-10-28 09:07:44,071 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-10-28 09:07:44,071 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-10-28 09:07:44,071 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-10-28 09:07:44,071 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-10-28 09:07:44,072 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-10-28 09:07:44,072 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-10-28 09:07:44,072 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-10-28 09:07:44,072 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-10-28 09:07:44,072 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-10-28 09:07:44,073 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-10-28 09:07:44,073 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2021-10-28 09:07:44,073 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2021-10-28 09:07:44,073 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2021-10-28 09:07:44,073 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-10-28 09:07:44,074 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-10-28 09:07:44,074 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-10-28 09:07:44,074 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-10-28 09:07:44,074 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-10-28 09:07:44,074 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-10-28 09:07:44,075 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-10-28 09:07:44,075 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-10-28 09:07:44,075 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-10-28 09:07:44,075 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-10-28 09:07:44,075 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-10-28 09:07:44,076 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-10-28 09:07:44,076 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-10-28 09:07:44,076 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-10-28 09:07:44,077 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-10-28 09:07:44,077 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-10-28 09:07:44,077 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-10-28 09:07:44,077 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-10-28 09:07:44,077 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-10-28 09:07:44,078 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-10-28 09:07:44,078 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-10-28 09:07:44,078 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-10-28 09:07:44,078 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-10-28 09:07:44,079 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-10-28 09:07:44,079 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-10-28 09:07:44,080 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-10-28 09:07:44,080 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-10-28 09:07:44,080 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-10-28 09:07:44,080 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-10-28 09:07:44,081 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-10-28 09:07:44,081 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-10-28 09:07:44,081 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-10-28 09:07:44,081 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-10-28 09:07:44,082 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-10-28 09:07:44,082 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-10-28 09:07:44,082 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-10-28 09:07:44,082 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-10-28 09:07:44,083 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-10-28 09:07:44,084 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-10-28 09:07:44,084 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-10-28 09:07:44,085 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-10-28 09:07:44,085 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-10-28 09:07:44,085 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-10-28 09:07:44,085 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-10-28 09:07:44,086 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-10-28 09:07:44,086 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-10-28 09:07:44,086 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-10-28 09:07:44,086 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-10-28 09:07:44,086 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-10-28 09:07:44,087 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-10-28 09:07:44,087 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-10-28 09:07:44,088 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-10-28 09:07:44,088 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-10-28 09:07:44,088 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-10-28 09:07:44,088 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-10-28 09:07:44,089 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-10-28 09:07:44,089 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-10-28 09:07:44,089 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-10-28 09:07:44,089 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-10-28 09:07:44,089 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-10-28 09:07:44,090 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-10-28 09:07:44,090 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-10-28 09:07:44,090 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-10-28 09:07:44,090 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-10-28 09:07:44,090 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-10-28 09:07:44,091 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-10-28 09:07:44,091 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-10-28 09:07:44,091 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-10-28 09:07:44,091 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-10-28 09:07:44,091 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-10-28 09:07:44,092 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-10-28 09:07:44,092 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-10-28 09:07:44,092 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-10-28 09:07:44,092 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-10-28 09:07:44,092 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-10-28 09:07:44,093 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-10-28 09:07:44,093 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-10-28 09:07:44,093 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-10-28 09:07:44,094 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-10-28 09:07:44,094 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-10-28 09:07:44,094 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-10-28 09:07:44,094 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-10-28 09:07:44,095 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-10-28 09:07:44,095 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-10-28 09:07:44,095 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-10-28 09:07:44,095 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-10-28 09:07:44,096 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-10-28 09:07:44,096 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2021-10-28 09:07:44,096 INFO L130 BoogieDeclarations]: Found specification of procedure cstrreplace [2021-10-28 09:07:44,096 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-28 09:07:44,096 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-28 09:07:44,097 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-10-28 09:07:44,097 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-28 09:07:44,097 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-28 09:07:44,097 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-10-28 09:07:44,098 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-28 09:07:44,517 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-28 09:07:44,518 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-10-28 09:07:44,520 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:07:44 BoogieIcfgContainer [2021-10-28 09:07:44,520 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-28 09:07:44,522 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-28 09:07:44,522 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-28 09:07:44,526 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-28 09:07:44,526 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 09:07:43" (1/3) ... [2021-10-28 09:07:44,527 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37efe793 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 09:07:44, skipping insertion in model container [2021-10-28 09:07:44,531 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:07:43" (2/3) ... [2021-10-28 09:07:44,532 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37efe793 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 09:07:44, skipping insertion in model container [2021-10-28 09:07:44,533 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:07:44" (3/3) ... [2021-10-28 09:07:44,535 INFO L111 eAbstractionObserver]: Analyzing ICFG strreplace-alloca-2.i [2021-10-28 09:07:44,547 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-28 09:07:44,548 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 11 error locations. [2021-10-28 09:07:44,605 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-28 09:07:44,613 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-28 09:07:44,613 INFO L340 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2021-10-28 09:07:44,629 INFO L276 IsEmpty]: Start isEmpty. Operand has 42 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 35 states have internal predecessors, (41), 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) [2021-10-28 09:07:44,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-28 09:07:44,636 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:07:44,637 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:07:44,637 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr2REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 6 more)] === [2021-10-28 09:07:44,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:07:44,643 INFO L85 PathProgramCache]: Analyzing trace with hash -610270170, now seen corresponding path program 1 times [2021-10-28 09:07:44,662 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:07:44,663 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775510169] [2021-10-28 09:07:44,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:07:44,664 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:07:44,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:07:44,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:07:44,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:07:44,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:07:44,861 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:07:44,861 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775510169] [2021-10-28 09:07:44,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775510169] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:07:44,862 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:07:44,862 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-28 09:07:44,864 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217812799] [2021-10-28 09:07:44,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 09:07:44,871 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:07:44,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 09:07:44,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 09:07:44,890 INFO L87 Difference]: Start difference. First operand has 42 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 35 states have internal predecessors, (41), 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 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:07:45,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:07:45,025 INFO L93 Difference]: Finished difference Result 40 states and 43 transitions. [2021-10-28 09:07:45,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 09:07:45,027 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2021-10-28 09:07:45,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:07:45,034 INFO L225 Difference]: With dead ends: 40 [2021-10-28 09:07:45,035 INFO L226 Difference]: Without dead ends: 37 [2021-10-28 09:07:45,036 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 09:07:45,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-10-28 09:07:45,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-10-28 09:07:45,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 31 states have internal predecessors, (35), 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) [2021-10-28 09:07:45,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 40 transitions. [2021-10-28 09:07:45,068 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 40 transitions. Word has length 10 [2021-10-28 09:07:45,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:07:45,069 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 40 transitions. [2021-10-28 09:07:45,069 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:07:45,069 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 40 transitions. [2021-10-28 09:07:45,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-28 09:07:45,070 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:07:45,070 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:07:45,070 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-28 09:07:45,071 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 6 more)] === [2021-10-28 09:07:45,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:07:45,072 INFO L85 PathProgramCache]: Analyzing trace with hash -610270169, now seen corresponding path program 1 times [2021-10-28 09:07:45,072 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:07:45,072 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365237770] [2021-10-28 09:07:45,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:07:45,073 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:07:45,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:07:45,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:07:45,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:07:45,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:07:45,256 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:07:45,256 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365237770] [2021-10-28 09:07:45,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365237770] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:07:45,257 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:07:45,257 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-28 09:07:45,257 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618340611] [2021-10-28 09:07:45,258 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-28 09:07:45,259 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:07:45,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-28 09:07:45,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-28 09:07:45,260 INFO L87 Difference]: Start difference. First operand 37 states and 40 transitions. Second operand has 5 states, 4 states have (on average 1.75) 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) [2021-10-28 09:07:45,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:07:45,375 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2021-10-28 09:07:45,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-28 09:07:45,375 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) 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 [2021-10-28 09:07:45,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:07:45,376 INFO L225 Difference]: With dead ends: 36 [2021-10-28 09:07:45,376 INFO L226 Difference]: Without dead ends: 36 [2021-10-28 09:07:45,377 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-28 09:07:45,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-10-28 09:07:45,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-10-28 09:07:45,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 30 states have internal predecessors, (34), 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) [2021-10-28 09:07:45,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2021-10-28 09:07:45,383 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 10 [2021-10-28 09:07:45,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:07:45,383 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2021-10-28 09:07:45,383 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) 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) [2021-10-28 09:07:45,384 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2021-10-28 09:07:45,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-28 09:07:45,384 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:07:45,384 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:07:45,384 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-28 09:07:45,385 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 6 more)] === [2021-10-28 09:07:45,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:07:45,385 INFO L85 PathProgramCache]: Analyzing trace with hash -610270116, now seen corresponding path program 1 times [2021-10-28 09:07:45,385 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:07:45,386 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474419271] [2021-10-28 09:07:45,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:07:45,386 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:07:45,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:07:45,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:07:45,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:07:45,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:07:45,486 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:07:45,487 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474419271] [2021-10-28 09:07:45,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474419271] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:07:45,491 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:07:45,491 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-28 09:07:45,491 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849618697] [2021-10-28 09:07:45,492 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-28 09:07:45,492 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:07:45,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-28 09:07:45,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-28 09:07:45,493 INFO L87 Difference]: Start difference. First operand 36 states and 39 transitions. 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) [2021-10-28 09:07:45,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:07:45,591 INFO L93 Difference]: Finished difference Result 44 states and 47 transitions. [2021-10-28 09:07:45,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-28 09:07:45,595 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 [2021-10-28 09:07:45,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:07:45,601 INFO L225 Difference]: With dead ends: 44 [2021-10-28 09:07:45,602 INFO L226 Difference]: Without dead ends: 44 [2021-10-28 09:07:45,603 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-28 09:07:45,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-10-28 09:07:45,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 38. [2021-10-28 09:07:45,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 25 states have (on average 1.44) internal successors, (36), 32 states have internal predecessors, (36), 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) [2021-10-28 09:07:45,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2021-10-28 09:07:45,620 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 10 [2021-10-28 09:07:45,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:07:45,620 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2021-10-28 09:07:45,620 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) [2021-10-28 09:07:45,620 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2021-10-28 09:07:45,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-28 09:07:45,621 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:07:45,621 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:07:45,621 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-28 09:07:45,621 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 6 more)] === [2021-10-28 09:07:45,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:07:45,623 INFO L85 PathProgramCache]: Analyzing trace with hash -610210534, now seen corresponding path program 1 times [2021-10-28 09:07:45,623 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:07:45,623 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896792937] [2021-10-28 09:07:45,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:07:45,623 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:07:45,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:07:45,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:07:45,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:07:45,732 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:07:45,732 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:07:45,732 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896792937] [2021-10-28 09:07:45,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896792937] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:07:45,733 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:07:45,733 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-28 09:07:45,733 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832226383] [2021-10-28 09:07:45,734 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-28 09:07:45,734 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:07:45,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-28 09:07:45,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-28 09:07:45,735 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand has 6 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:07:45,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:07:45,832 INFO L93 Difference]: Finished difference Result 48 states and 52 transitions. [2021-10-28 09:07:45,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-28 09:07:45,833 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2021-10-28 09:07:45,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:07:45,834 INFO L225 Difference]: With dead ends: 48 [2021-10-28 09:07:45,834 INFO L226 Difference]: Without dead ends: 48 [2021-10-28 09:07:45,835 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-28 09:07:45,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-10-28 09:07:45,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 40. [2021-10-28 09:07:45,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 34 states have internal predecessors, (39), 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) [2021-10-28 09:07:45,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2021-10-28 09:07:45,840 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 10 [2021-10-28 09:07:45,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:07:45,840 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2021-10-28 09:07:45,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:07:45,840 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2021-10-28 09:07:45,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-28 09:07:45,841 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:07:45,841 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:07:45,841 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-28 09:07:45,842 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting cstrreplaceErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 6 more)] === [2021-10-28 09:07:45,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:07:45,842 INFO L85 PathProgramCache]: Analyzing trace with hash 1176041719, now seen corresponding path program 1 times [2021-10-28 09:07:45,842 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:07:45,842 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492212375] [2021-10-28 09:07:45,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:07:45,843 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:07:45,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:07:45,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:07:45,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:07:45,992 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:07:45,992 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:07:45,993 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492212375] [2021-10-28 09:07:45,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492212375] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:07:45,993 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:07:45,993 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-28 09:07:45,993 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045030395] [2021-10-28 09:07:45,994 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-28 09:07:45,994 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:07:45,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-28 09:07:45,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-28 09:07:45,995 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 4 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) [2021-10-28 09:07:46,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:07:46,103 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2021-10-28 09:07:46,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-28 09:07:46,103 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 4 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 [2021-10-28 09:07:46,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:07:46,104 INFO L225 Difference]: With dead ends: 37 [2021-10-28 09:07:46,105 INFO L226 Difference]: Without dead ends: 37 [2021-10-28 09:07:46,106 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-10-28 09:07:46,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-10-28 09:07:46,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-10-28 09:07:46,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 27 states have (on average 1.3333333333333333) internal successors, (36), 31 states have internal predecessors, (36), 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) [2021-10-28 09:07:46,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2021-10-28 09:07:46,125 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 14 [2021-10-28 09:07:46,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:07:46,125 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2021-10-28 09:07:46,125 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 4 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) [2021-10-28 09:07:46,126 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2021-10-28 09:07:46,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-28 09:07:46,126 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:07:46,126 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:07:46,127 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-28 09:07:46,127 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting cstrreplaceErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 6 more)] === [2021-10-28 09:07:46,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:07:46,129 INFO L85 PathProgramCache]: Analyzing trace with hash 1176041720, now seen corresponding path program 1 times [2021-10-28 09:07:46,129 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:07:46,129 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861581663] [2021-10-28 09:07:46,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:07:46,129 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:07:46,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:07:46,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:07:46,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:07:46,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:07:46,340 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:07:46,341 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861581663] [2021-10-28 09:07:46,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861581663] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:07:46,341 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:07:46,341 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-10-28 09:07:46,342 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553547577] [2021-10-28 09:07:46,342 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-28 09:07:46,343 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:07:46,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-28 09:07:46,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-10-28 09:07:46,344 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand has 8 states, 7 states have (on average 1.4285714285714286) 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) [2021-10-28 09:07:46,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:07:46,535 INFO L93 Difference]: Finished difference Result 47 states and 53 transitions. [2021-10-28 09:07:46,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-28 09:07:46,535 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.4285714285714286) 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 [2021-10-28 09:07:46,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:07:46,541 INFO L225 Difference]: With dead ends: 47 [2021-10-28 09:07:46,541 INFO L226 Difference]: Without dead ends: 47 [2021-10-28 09:07:46,543 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-10-28 09:07:46,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-10-28 09:07:46,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 42. [2021-10-28 09:07:46,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 32 states have (on average 1.34375) internal successors, (43), 36 states have internal predecessors, (43), 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) [2021-10-28 09:07:46,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2021-10-28 09:07:46,554 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 14 [2021-10-28 09:07:46,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:07:46,555 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2021-10-28 09:07:46,556 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.4285714285714286) 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) [2021-10-28 09:07:46,556 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2021-10-28 09:07:46,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-28 09:07:46,557 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:07:46,558 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:07:46,558 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-28 09:07:46,558 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 6 more)] === [2021-10-28 09:07:46,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:07:46,559 INFO L85 PathProgramCache]: Analyzing trace with hash 415323869, now seen corresponding path program 1 times [2021-10-28 09:07:46,559 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:07:46,560 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066107059] [2021-10-28 09:07:46,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:07:46,561 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:07:46,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:07:46,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:07:46,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:07:46,651 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:07:46,652 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:07:46,652 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066107059] [2021-10-28 09:07:46,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066107059] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:07:46,652 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001607401] [2021-10-28 09:07:46,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:07:46,653 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:07:46,653 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0414e50f-624b-4373-895e-2ea340b1c29e/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:07:46,655 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0414e50f-624b-4373-895e-2ea340b1c29e/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:07:46,665 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0414e50f-624b-4373-895e-2ea340b1c29e/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-28 09:07:46,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:07:46,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-28 09:07:46,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:07:46,928 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 6 treesize of output 5 [2021-10-28 09:07:47,082 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:07:47,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1001607401] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:07:47,086 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:07:47,087 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2021-10-28 09:07:47,087 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941138769] [2021-10-28 09:07:47,088 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-28 09:07:47,088 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:07:47,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-28 09:07:47,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-10-28 09:07:47,090 INFO L87 Difference]: Start difference. First operand 42 states and 48 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:07:47,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:07:47,219 INFO L93 Difference]: Finished difference Result 49 states and 55 transitions. [2021-10-28 09:07:47,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-28 09:07:47,220 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2021-10-28 09:07:47,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:07:47,222 INFO L225 Difference]: With dead ends: 49 [2021-10-28 09:07:47,223 INFO L226 Difference]: Without dead ends: 49 [2021-10-28 09:07:47,223 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-10-28 09:07:47,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-10-28 09:07:47,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 39. [2021-10-28 09:07:47,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 30 states have (on average 1.3) internal successors, (39), 33 states have internal predecessors, (39), 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) [2021-10-28 09:07:47,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 44 transitions. [2021-10-28 09:07:47,242 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 44 transitions. Word has length 14 [2021-10-28 09:07:47,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:07:47,243 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 44 transitions. [2021-10-28 09:07:47,243 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:07:47,244 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 44 transitions. [2021-10-28 09:07:47,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-28 09:07:47,245 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:07:47,245 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:07:47,287 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0414e50f-624b-4373-895e-2ea340b1c29e/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-28 09:07:47,459 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0414e50f-624b-4373-895e-2ea340b1c29e/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:07:47,460 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting cstrreplaceErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 6 more)] === [2021-10-28 09:07:47,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:07:47,460 INFO L85 PathProgramCache]: Analyzing trace with hash -1580673573, now seen corresponding path program 1 times [2021-10-28 09:07:47,460 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:07:47,460 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857167053] [2021-10-28 09:07:47,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:07:47,461 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:07:47,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:07:47,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:07:47,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:07:47,662 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:07:47,662 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:07:47,662 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857167053] [2021-10-28 09:07:47,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857167053] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:07:47,663 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:07:47,663 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-10-28 09:07:47,663 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987134074] [2021-10-28 09:07:47,664 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-28 09:07:47,664 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:07:47,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-28 09:07:47,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-10-28 09:07:47,665 INFO L87 Difference]: Start difference. First operand 39 states and 44 transitions. Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 7 states have internal predecessors, (15), 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) [2021-10-28 09:07:47,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:07:47,856 INFO L93 Difference]: Finished difference Result 51 states and 55 transitions. [2021-10-28 09:07:47,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-28 09:07:47,857 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 7 states have internal predecessors, (15), 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 19 [2021-10-28 09:07:47,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:07:47,858 INFO L225 Difference]: With dead ends: 51 [2021-10-28 09:07:47,859 INFO L226 Difference]: Without dead ends: 51 [2021-10-28 09:07:47,860 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-10-28 09:07:47,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-10-28 09:07:47,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 48. [2021-10-28 09:07:47,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 37 states have (on average 1.2432432432432432) internal successors, (46), 41 states have internal predecessors, (46), 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) [2021-10-28 09:07:47,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 53 transitions. [2021-10-28 09:07:47,867 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 53 transitions. Word has length 19 [2021-10-28 09:07:47,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:07:47,868 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 53 transitions. [2021-10-28 09:07:47,868 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 7 states have internal predecessors, (15), 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) [2021-10-28 09:07:47,868 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 53 transitions. [2021-10-28 09:07:47,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-28 09:07:47,869 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:07:47,869 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:07:47,869 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-28 09:07:47,870 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting cstrreplaceErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 6 more)] === [2021-10-28 09:07:47,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:07:47,870 INFO L85 PathProgramCache]: Analyzing trace with hash 2127487709, now seen corresponding path program 1 times [2021-10-28 09:07:47,870 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:07:47,871 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852380582] [2021-10-28 09:07:47,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:07:47,871 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:07:47,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:07:48,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:07:48,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:07:48,076 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:07:48,077 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:07:48,077 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852380582] [2021-10-28 09:07:48,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852380582] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:07:48,077 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:07:48,077 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-28 09:07:48,078 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404956700] [2021-10-28 09:07:48,078 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-28 09:07:48,078 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:07:48,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-28 09:07:48,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-10-28 09:07:48,080 INFO L87 Difference]: Start difference. First operand 48 states and 53 transitions. Second operand has 10 states, 10 states have (on average 1.5) internal successors, (15), 8 states have internal predecessors, (15), 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) [2021-10-28 09:07:48,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:07:48,328 INFO L93 Difference]: Finished difference Result 64 states and 69 transitions. [2021-10-28 09:07:48,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-28 09:07:48,329 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.5) internal successors, (15), 8 states have internal predecessors, (15), 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 19 [2021-10-28 09:07:48,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:07:48,329 INFO L225 Difference]: With dead ends: 64 [2021-10-28 09:07:48,329 INFO L226 Difference]: Without dead ends: 64 [2021-10-28 09:07:48,330 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-10-28 09:07:48,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-10-28 09:07:48,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 49. [2021-10-28 09:07:48,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 38 states have (on average 1.263157894736842) internal successors, (48), 42 states have internal predecessors, (48), 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) [2021-10-28 09:07:48,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 55 transitions. [2021-10-28 09:07:48,334 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 55 transitions. Word has length 19 [2021-10-28 09:07:48,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:07:48,335 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 55 transitions. [2021-10-28 09:07:48,335 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.5) internal successors, (15), 8 states have internal predecessors, (15), 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) [2021-10-28 09:07:48,335 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 55 transitions. [2021-10-28 09:07:48,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-28 09:07:48,336 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:07:48,336 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:07:48,336 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-10-28 09:07:48,336 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr4ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 6 more)] === [2021-10-28 09:07:48,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:07:48,337 INFO L85 PathProgramCache]: Analyzing trace with hash -1797581199, now seen corresponding path program 1 times [2021-10-28 09:07:48,337 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:07:48,337 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136536725] [2021-10-28 09:07:48,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:07:48,337 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:07:48,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:07:48,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:07:48,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:07:48,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-28 09:07:48,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:07:48,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:07:48,418 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:07:48,419 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136536725] [2021-10-28 09:07:48,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136536725] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:07:48,422 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:07:48,423 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-28 09:07:48,423 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796255225] [2021-10-28 09:07:48,424 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-28 09:07:48,424 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:07:48,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-28 09:07:48,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-10-28 09:07:48,426 INFO L87 Difference]: Start difference. First operand 49 states and 55 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) [2021-10-28 09:07:48,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:07:48,522 INFO L93 Difference]: Finished difference Result 61 states and 69 transitions. [2021-10-28 09:07:48,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-28 09:07:48,522 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 20 [2021-10-28 09:07:48,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:07:48,523 INFO L225 Difference]: With dead ends: 61 [2021-10-28 09:07:48,523 INFO L226 Difference]: Without dead ends: 42 [2021-10-28 09:07:48,524 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 [2021-10-28 09:07:48,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-10-28 09:07:48,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 32. [2021-10-28 09:07:48,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 25 states have (on average 1.24) internal successors, (31), 27 states have internal predecessors, (31), 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) [2021-10-28 09:07:48,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2021-10-28 09:07:48,532 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 20 [2021-10-28 09:07:48,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:07:48,533 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2021-10-28 09:07:48,534 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) [2021-10-28 09:07:48,534 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2021-10-28 09:07:48,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-28 09:07:48,537 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:07:48,537 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:07:48,538 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-10-28 09:07:48,538 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting cstrreplaceErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 6 more)] === [2021-10-28 09:07:48,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:07:48,538 INFO L85 PathProgramCache]: Analyzing trace with hash 956679290, now seen corresponding path program 1 times [2021-10-28 09:07:48,539 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:07:48,539 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904055551] [2021-10-28 09:07:48,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:07:48,539 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:07:48,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:07:48,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:07:48,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:07:48,744 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:07:48,744 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:07:48,745 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904055551] [2021-10-28 09:07:48,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904055551] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:07:48,745 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822958169] [2021-10-28 09:07:48,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:07:48,745 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:07:48,746 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0414e50f-624b-4373-895e-2ea340b1c29e/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:07:48,747 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0414e50f-624b-4373-895e-2ea340b1c29e/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:07:48,767 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0414e50f-624b-4373-895e-2ea340b1c29e/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-28 09:07:48,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:07:48,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 22 conjunts are in the unsatisfiable core [2021-10-28 09:07:48,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:07:48,902 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 6 treesize of output 5 [2021-10-28 09:07:49,084 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:07:49,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822958169] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:07:49,085 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:07:49,085 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 14 [2021-10-28 09:07:49,085 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81797851] [2021-10-28 09:07:49,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-28 09:07:49,086 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:07:49,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-28 09:07:49,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-10-28 09:07:49,087 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand has 15 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 12 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) [2021-10-28 09:07:49,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:07:49,302 INFO L93 Difference]: Finished difference Result 44 states and 48 transitions. [2021-10-28 09:07:49,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-28 09:07:49,303 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 12 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 23 [2021-10-28 09:07:49,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:07:49,304 INFO L225 Difference]: With dead ends: 44 [2021-10-28 09:07:49,304 INFO L226 Difference]: Without dead ends: 44 [2021-10-28 09:07:49,304 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2021-10-28 09:07:49,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-10-28 09:07:49,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 39. [2021-10-28 09:07:49,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 32 states have (on average 1.21875) internal successors, (39), 34 states have internal predecessors, (39), 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) [2021-10-28 09:07:49,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2021-10-28 09:07:49,307 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 23 [2021-10-28 09:07:49,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:07:49,308 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2021-10-28 09:07:49,308 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 12 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) [2021-10-28 09:07:49,308 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2021-10-28 09:07:49,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-28 09:07:49,309 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:07:49,309 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:07:49,351 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0414e50f-624b-4373-895e-2ea340b1c29e/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-28 09:07:49,523 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0414e50f-624b-4373-895e-2ea340b1c29e/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:07:49,523 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting cstrreplaceErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 6 more)] === [2021-10-28 09:07:49,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:07:49,524 INFO L85 PathProgramCache]: Analyzing trace with hash -403117159, now seen corresponding path program 2 times [2021-10-28 09:07:49,524 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:07:49,524 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867450163] [2021-10-28 09:07:49,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:07:49,525 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:07:49,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:07:49,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:07:49,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:07:49,748 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:07:49,748 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:07:49,749 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867450163] [2021-10-28 09:07:49,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867450163] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:07:49,749 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209193778] [2021-10-28 09:07:49,749 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 09:07:49,749 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:07:49,750 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0414e50f-624b-4373-895e-2ea340b1c29e/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:07:49,750 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0414e50f-624b-4373-895e-2ea340b1c29e/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:07:49,774 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0414e50f-624b-4373-895e-2ea340b1c29e/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-28 09:07:49,892 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 09:07:49,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:07:49,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 29 conjunts are in the unsatisfiable core [2021-10-28 09:07:49,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:07:49,921 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 6 treesize of output 5 [2021-10-28 09:07:49,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-10-28 09:07:50,127 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-28 09:07:50,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-10-28 09:07:50,251 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:07:50,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [209193778] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:07:50,252 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:07:50,252 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 21 [2021-10-28 09:07:50,252 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870023186] [2021-10-28 09:07:50,252 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-28 09:07:50,252 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:07:50,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-28 09:07:50,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=372, Unknown=0, NotChecked=0, Total=420 [2021-10-28 09:07:50,254 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 18 states have internal predecessors, (45), 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) [2021-10-28 09:07:51,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:07:51,244 INFO L93 Difference]: Finished difference Result 77 states and 83 transitions. [2021-10-28 09:07:51,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-10-28 09:07:51,245 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 18 states have internal predecessors, (45), 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 28 [2021-10-28 09:07:51,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:07:51,246 INFO L225 Difference]: With dead ends: 77 [2021-10-28 09:07:51,246 INFO L226 Difference]: Without dead ends: 46 [2021-10-28 09:07:51,247 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=263, Invalid=1543, Unknown=0, NotChecked=0, Total=1806 [2021-10-28 09:07:51,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-10-28 09:07:51,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 43. [2021-10-28 09:07:51,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 38 states have internal predecessors, (42), 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) [2021-10-28 09:07:51,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 46 transitions. [2021-10-28 09:07:51,250 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 46 transitions. Word has length 28 [2021-10-28 09:07:51,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:07:51,250 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 46 transitions. [2021-10-28 09:07:51,251 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 18 states have internal predecessors, (45), 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) [2021-10-28 09:07:51,251 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 46 transitions. [2021-10-28 09:07:51,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-10-28 09:07:51,252 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:07:51,252 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:07:51,291 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0414e50f-624b-4373-895e-2ea340b1c29e/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-28 09:07:51,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0414e50f-624b-4373-895e-2ea340b1c29e/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-10-28 09:07:51,455 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting cstrreplaceErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 6 more)] === [2021-10-28 09:07:51,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:07:51,456 INFO L85 PathProgramCache]: Analyzing trace with hash -2074125057, now seen corresponding path program 1 times [2021-10-28 09:07:51,456 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:07:51,456 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528786798] [2021-10-28 09:07:51,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:07:51,457 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:07:51,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:07:51,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:07:51,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:07:51,652 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:07:51,652 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:07:51,652 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528786798] [2021-10-28 09:07:51,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528786798] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:07:51,653 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116306400] [2021-10-28 09:07:51,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:07:51,653 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:07:51,653 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0414e50f-624b-4373-895e-2ea340b1c29e/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:07:51,654 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0414e50f-624b-4373-895e-2ea340b1c29e/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:07:51,663 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0414e50f-624b-4373-895e-2ea340b1c29e/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-28 09:07:51,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:07:51,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 27 conjunts are in the unsatisfiable core [2021-10-28 09:07:51,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:07:51,839 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 6 treesize of output 5 [2021-10-28 09:07:52,146 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:07:52,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [116306400] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:07:52,146 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:07:52,147 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-10-28 09:07:52,150 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544251962] [2021-10-28 09:07:52,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-28 09:07:52,152 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:07:52,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-28 09:07:52,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-10-28 09:07:52,153 INFO L87 Difference]: Start difference. First operand 43 states and 46 transitions. Second operand has 18 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 15 states have internal predecessors, (52), 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) [2021-10-28 09:07:52,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:07:52,469 INFO L93 Difference]: Finished difference Result 52 states and 56 transitions. [2021-10-28 09:07:52,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-28 09:07:52,470 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 15 states have internal predecessors, (52), 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 34 [2021-10-28 09:07:52,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:07:52,471 INFO L225 Difference]: With dead ends: 52 [2021-10-28 09:07:52,471 INFO L226 Difference]: Without dead ends: 52 [2021-10-28 09:07:52,471 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-10-28 09:07:52,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-10-28 09:07:52,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 50. [2021-10-28 09:07:52,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 43 states have (on average 1.1627906976744187) internal successors, (50), 45 states have internal predecessors, (50), 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) [2021-10-28 09:07:52,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2021-10-28 09:07:52,474 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 34 [2021-10-28 09:07:52,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:07:52,475 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2021-10-28 09:07:52,475 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 15 states have internal predecessors, (52), 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) [2021-10-28 09:07:52,475 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2021-10-28 09:07:52,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-10-28 09:07:52,476 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:07:52,476 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:07:52,516 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0414e50f-624b-4373-895e-2ea340b1c29e/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-28 09:07:52,677 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0414e50f-624b-4373-895e-2ea340b1c29e/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-10-28 09:07:52,677 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting cstrreplaceErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 6 more)] === [2021-10-28 09:07:52,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:07:52,677 INFO L85 PathProgramCache]: Analyzing trace with hash 265477684, now seen corresponding path program 2 times [2021-10-28 09:07:52,677 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:07:52,677 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950417463] [2021-10-28 09:07:52,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:07:52,678 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:07:52,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:07:52,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:07:52,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:07:52,912 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:07:52,912 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:07:52,913 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950417463] [2021-10-28 09:07:52,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950417463] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:07:52,913 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992026306] [2021-10-28 09:07:52,913 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 09:07:52,913 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:07:52,914 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0414e50f-624b-4373-895e-2ea340b1c29e/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:07:52,915 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0414e50f-624b-4373-895e-2ea340b1c29e/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:07:52,934 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0414e50f-624b-4373-895e-2ea340b1c29e/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-28 09:07:53,096 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 09:07:53,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:07:53,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 38 conjunts are in the unsatisfiable core [2021-10-28 09:07:53,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:07:53,150 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 6 treesize of output 5 [2021-10-28 09:07:53,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-10-28 09:07:53,722 INFO L354 Elim1Store]: treesize reduction 32, result has 27.3 percent of original size [2021-10-28 09:07:53,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2021-10-28 09:07:54,025 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-28 09:07:54,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 28 [2021-10-28 09:07:54,213 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:07:54,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [992026306] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:07:54,213 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:07:54,214 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 26 [2021-10-28 09:07:54,214 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724268813] [2021-10-28 09:07:54,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-10-28 09:07:54,214 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:07:54,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-10-28 09:07:54,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=597, Unknown=0, NotChecked=0, Total=650 [2021-10-28 09:07:54,216 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 23 states have internal predecessors, (67), 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) [2021-10-28 09:07:55,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:07:55,820 INFO L93 Difference]: Finished difference Result 96 states and 103 transitions. [2021-10-28 09:07:55,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-10-28 09:07:55,820 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 23 states have internal predecessors, (67), 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 39 [2021-10-28 09:07:55,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:07:55,821 INFO L225 Difference]: With dead ends: 96 [2021-10-28 09:07:55,821 INFO L226 Difference]: Without dead ends: 76 [2021-10-28 09:07:55,823 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=225, Invalid=2031, Unknown=0, NotChecked=0, Total=2256 [2021-10-28 09:07:55,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-10-28 09:07:55,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 61. [2021-10-28 09:07:55,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 54 states have (on average 1.1481481481481481) internal successors, (62), 56 states have internal predecessors, (62), 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) [2021-10-28 09:07:55,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 66 transitions. [2021-10-28 09:07:55,827 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 66 transitions. Word has length 39 [2021-10-28 09:07:55,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:07:55,827 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 66 transitions. [2021-10-28 09:07:55,827 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 23 states have internal predecessors, (67), 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) [2021-10-28 09:07:55,827 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 66 transitions. [2021-10-28 09:07:55,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-10-28 09:07:55,829 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:07:55,829 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:07:55,867 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0414e50f-624b-4373-895e-2ea340b1c29e/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-28 09:07:56,046 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0414e50f-624b-4373-895e-2ea340b1c29e/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-10-28 09:07:56,046 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting cstrreplaceErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 6 more)] === [2021-10-28 09:07:56,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:07:56,046 INFO L85 PathProgramCache]: Analyzing trace with hash 1656295202, now seen corresponding path program 3 times [2021-10-28 09:07:56,046 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:07:56,047 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858958043] [2021-10-28 09:07:56,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:07:56,047 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:07:56,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:07:56,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:07:56,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:07:56,301 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 13 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:07:56,301 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:07:56,302 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858958043] [2021-10-28 09:07:56,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858958043] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:07:56,302 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44433318] [2021-10-28 09:07:56,302 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 09:07:56,302 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:07:56,303 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0414e50f-624b-4373-895e-2ea340b1c29e/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:07:56,314 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0414e50f-624b-4373-895e-2ea340b1c29e/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:07:56,315 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0414e50f-624b-4373-895e-2ea340b1c29e/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-28 09:07:56,518 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-10-28 09:07:56,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:07:56,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 42 conjunts are in the unsatisfiable core [2021-10-28 09:07:56,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:07:56,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-10-28 09:07:57,008 INFO L354 Elim1Store]: treesize reduction 26, result has 27.8 percent of original size [2021-10-28 09:07:57,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2021-10-28 09:07:57,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-10-28 09:07:57,112 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 13 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:07:57,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44433318] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:07:57,112 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:07:57,113 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 25 [2021-10-28 09:07:57,113 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689352165] [2021-10-28 09:07:57,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-10-28 09:07:57,114 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:07:57,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-10-28 09:07:57,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-10-28 09:07:57,115 INFO L87 Difference]: Start difference. First operand 61 states and 66 transitions. Second operand has 25 states, 25 states have (on average 2.76) internal successors, (69), 22 states have internal predecessors, (69), 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) [2021-10-28 09:07:57,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:07:57,891 INFO L93 Difference]: Finished difference Result 104 states and 111 transitions. [2021-10-28 09:07:57,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-28 09:07:57,892 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.76) internal successors, (69), 22 states have internal predecessors, (69), 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 48 [2021-10-28 09:07:57,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:07:57,892 INFO L225 Difference]: With dead ends: 104 [2021-10-28 09:07:57,892 INFO L226 Difference]: Without dead ends: 68 [2021-10-28 09:07:57,893 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=148, Invalid=1258, Unknown=0, NotChecked=0, Total=1406 [2021-10-28 09:07:57,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-10-28 09:07:57,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 65. [2021-10-28 09:07:57,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 58 states have (on average 1.1379310344827587) internal successors, (66), 60 states have internal predecessors, (66), 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) [2021-10-28 09:07:57,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 70 transitions. [2021-10-28 09:07:57,895 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 70 transitions. Word has length 48 [2021-10-28 09:07:57,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:07:57,895 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 70 transitions. [2021-10-28 09:07:57,895 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.76) internal successors, (69), 22 states have internal predecessors, (69), 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) [2021-10-28 09:07:57,895 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 70 transitions. [2021-10-28 09:07:57,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-10-28 09:07:57,896 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:07:57,897 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:07:57,929 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0414e50f-624b-4373-895e-2ea340b1c29e/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-28 09:07:58,097 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0414e50f-624b-4373-895e-2ea340b1c29e/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-10-28 09:07:58,097 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting cstrreplaceErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 6 more)] === [2021-10-28 09:07:58,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:07:58,098 INFO L85 PathProgramCache]: Analyzing trace with hash 1224674981, now seen corresponding path program 4 times [2021-10-28 09:07:58,098 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:07:58,098 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135872082] [2021-10-28 09:07:58,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:07:58,098 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:07:58,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:07:58,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:07:58,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:07:58,347 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 6 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:07:58,347 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:07:58,348 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135872082] [2021-10-28 09:07:58,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135872082] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:07:58,348 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896647842] [2021-10-28 09:07:58,348 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-28 09:07:58,348 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:07:58,349 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0414e50f-624b-4373-895e-2ea340b1c29e/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:07:58,350 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0414e50f-624b-4373-895e-2ea340b1c29e/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:07:58,374 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0414e50f-624b-4373-895e-2ea340b1c29e/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-28 09:07:58,601 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-28 09:07:58,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:07:58,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 37 conjunts are in the unsatisfiable core [2021-10-28 09:07:58,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:07:58,641 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 6 treesize of output 5 [2021-10-28 09:07:59,212 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 15 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:07:59,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [896647842] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:07:59,213 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:07:59,213 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 25 [2021-10-28 09:07:59,213 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541249691] [2021-10-28 09:07:59,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-10-28 09:07:59,214 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:07:59,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-10-28 09:07:59,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=573, Unknown=0, NotChecked=0, Total=650 [2021-10-28 09:07:59,216 INFO L87 Difference]: Start difference. First operand 65 states and 70 transitions. Second operand has 26 states, 25 states have (on average 3.52) internal successors, (88), 23 states have internal predecessors, (88), 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) [2021-10-28 09:07:59,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:07:59,640 INFO L93 Difference]: Finished difference Result 74 states and 80 transitions. [2021-10-28 09:07:59,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-28 09:07:59,641 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 3.52) internal successors, (88), 23 states have internal predecessors, (88), 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 52 [2021-10-28 09:07:59,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:07:59,642 INFO L225 Difference]: With dead ends: 74 [2021-10-28 09:07:59,642 INFO L226 Difference]: Without dead ends: 74 [2021-10-28 09:07:59,643 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=134, Invalid=922, Unknown=0, NotChecked=0, Total=1056 [2021-10-28 09:07:59,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-10-28 09:07:59,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 72. [2021-10-28 09:07:59,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 65 states have (on average 1.1384615384615384) internal successors, (74), 67 states have internal predecessors, (74), 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) [2021-10-28 09:07:59,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 78 transitions. [2021-10-28 09:07:59,646 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 78 transitions. Word has length 52 [2021-10-28 09:07:59,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:07:59,646 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 78 transitions. [2021-10-28 09:07:59,647 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 3.52) internal successors, (88), 23 states have internal predecessors, (88), 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) [2021-10-28 09:07:59,647 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 78 transitions. [2021-10-28 09:07:59,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-10-28 09:07:59,648 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:07:59,648 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:07:59,687 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0414e50f-624b-4373-895e-2ea340b1c29e/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-28 09:07:59,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0414e50f-624b-4373-895e-2ea340b1c29e/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:07:59,864 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting cstrreplaceErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 6 more)] === [2021-10-28 09:07:59,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:07:59,864 INFO L85 PathProgramCache]: Analyzing trace with hash 2073969742, now seen corresponding path program 5 times [2021-10-28 09:07:59,864 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:07:59,864 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897258558] [2021-10-28 09:07:59,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:07:59,864 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:07:59,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:08:00,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:08:00,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:08:00,224 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 17 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:08:00,225 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:08:00,225 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897258558] [2021-10-28 09:08:00,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897258558] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:08:00,225 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466437037] [2021-10-28 09:08:00,225 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-28 09:08:00,225 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:08:00,226 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0414e50f-624b-4373-895e-2ea340b1c29e/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:08:00,227 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0414e50f-624b-4373-895e-2ea340b1c29e/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:08:00,239 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0414e50f-624b-4373-895e-2ea340b1c29e/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-28 09:08:00,521 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-10-28 09:08:00,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:08:00,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 48 conjunts are in the unsatisfiable core [2021-10-28 09:08:00,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:08:00,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-10-28 09:08:01,026 INFO L354 Elim1Store]: treesize reduction 26, result has 27.8 percent of original size [2021-10-28 09:08:01,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2021-10-28 09:08:01,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-10-28 09:08:01,162 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 17 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:08:01,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1466437037] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:08:01,163 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:08:01,163 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 28 [2021-10-28 09:08:01,165 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289556731] [2021-10-28 09:08:01,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-10-28 09:08:01,166 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:08:01,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-10-28 09:08:01,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=690, Unknown=0, NotChecked=0, Total=756 [2021-10-28 09:08:01,167 INFO L87 Difference]: Start difference. First operand 72 states and 78 transitions. Second operand has 28 states, 28 states have (on average 2.9285714285714284) internal successors, (82), 25 states have internal predecessors, (82), 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) [2021-10-28 09:08:02,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:08:02,248 INFO L93 Difference]: Finished difference Result 128 states and 138 transitions. [2021-10-28 09:08:02,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-28 09:08:02,248 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.9285714285714284) internal successors, (82), 25 states have internal predecessors, (82), 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 57 [2021-10-28 09:08:02,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:08:02,249 INFO L225 Difference]: With dead ends: 128 [2021-10-28 09:08:02,249 INFO L226 Difference]: Without dead ends: 79 [2021-10-28 09:08:02,250 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=167, Invalid=1639, Unknown=0, NotChecked=0, Total=1806 [2021-10-28 09:08:02,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-10-28 09:08:02,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 76. [2021-10-28 09:08:02,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 69 states have (on average 1.1304347826086956) internal successors, (78), 71 states have internal predecessors, (78), 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) [2021-10-28 09:08:02,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 82 transitions. [2021-10-28 09:08:02,253 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 82 transitions. Word has length 57 [2021-10-28 09:08:02,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:08:02,253 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 82 transitions. [2021-10-28 09:08:02,254 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.9285714285714284) internal successors, (82), 25 states have internal predecessors, (82), 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) [2021-10-28 09:08:02,254 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 82 transitions. [2021-10-28 09:08:02,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-10-28 09:08:02,255 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:08:02,255 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:08:02,282 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0414e50f-624b-4373-895e-2ea340b1c29e/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-10-28 09:08:02,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0414e50f-624b-4373-895e-2ea340b1c29e/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-10-28 09:08:02,468 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting cstrreplaceErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 6 more)] === [2021-10-28 09:08:02,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:08:02,468 INFO L85 PathProgramCache]: Analyzing trace with hash -63174613, now seen corresponding path program 6 times [2021-10-28 09:08:02,468 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:08:02,468 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748588935] [2021-10-28 09:08:02,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:08:02,468 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:08:02,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:08:02,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:08:02,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:08:02,754 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 15 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:08:02,754 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:08:02,754 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748588935] [2021-10-28 09:08:02,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748588935] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:08:02,754 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469822333] [2021-10-28 09:08:02,754 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-28 09:08:02,755 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:08:02,755 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0414e50f-624b-4373-895e-2ea340b1c29e/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:08:02,759 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0414e50f-624b-4373-895e-2ea340b1c29e/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:08:02,779 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0414e50f-624b-4373-895e-2ea340b1c29e/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-28 09:08:03,157 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-10-28 09:08:03,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:08:03,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 46 conjunts are in the unsatisfiable core [2021-10-28 09:08:03,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:08:03,192 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 6 treesize of output 5 [2021-10-28 09:08:03,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-10-28 09:08:03,639 INFO L354 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2021-10-28 09:08:03,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2021-10-28 09:08:03,880 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-10-28 09:08:03,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 16 [2021-10-28 09:08:03,976 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 12 proven. 55 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-10-28 09:08:03,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [469822333] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:08:03,976 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:08:03,976 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 26 [2021-10-28 09:08:03,976 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446291556] [2021-10-28 09:08:03,977 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-10-28 09:08:03,977 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:08:03,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-10-28 09:08:03,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2021-10-28 09:08:03,978 INFO L87 Difference]: Start difference. First operand 76 states and 82 transitions. Second operand has 27 states, 26 states have (on average 3.423076923076923) internal successors, (89), 24 states have internal predecessors, (89), 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) [2021-10-28 09:08:05,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:08:05,684 INFO L93 Difference]: Finished difference Result 80 states and 86 transitions. [2021-10-28 09:08:05,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-10-28 09:08:05,684 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 3.423076923076923) internal successors, (89), 24 states have internal predecessors, (89), 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 61 [2021-10-28 09:08:05,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:08:05,685 INFO L225 Difference]: With dead ends: 80 [2021-10-28 09:08:05,685 INFO L226 Difference]: Without dead ends: 0 [2021-10-28 09:08:05,685 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=353, Invalid=2299, Unknown=0, NotChecked=0, Total=2652 [2021-10-28 09:08:05,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-28 09:08:05,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-28 09:08:05,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:08:05,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-28 09:08:05,686 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 61 [2021-10-28 09:08:05,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:08:05,686 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-28 09:08:05,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 3.423076923076923) internal successors, (89), 24 states have internal predecessors, (89), 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) [2021-10-28 09:08:05,686 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-28 09:08:05,686 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-28 09:08:05,688 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr0REQUIRES_VIOLATION [2021-10-28 09:08:05,689 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr1REQUIRES_VIOLATION [2021-10-28 09:08:05,689 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr2REQUIRES_VIOLATION [2021-10-28 09:08:05,689 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr3REQUIRES_VIOLATION [2021-10-28 09:08:05,689 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr4ENSURES_VIOLATIONMEMORY_LEAK [2021-10-28 09:08:05,689 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrreplaceErr0REQUIRES_VIOLATION [2021-10-28 09:08:05,689 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrreplaceErr1REQUIRES_VIOLATION [2021-10-28 09:08:05,689 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrreplaceErr2REQUIRES_VIOLATION [2021-10-28 09:08:05,689 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrreplaceErr3REQUIRES_VIOLATION [2021-10-28 09:08:05,689 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrreplaceErr4REQUIRES_VIOLATION [2021-10-28 09:08:05,690 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrreplaceErr5REQUIRES_VIOLATION [2021-10-28 09:08:05,711 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0414e50f-624b-4373-895e-2ea340b1c29e/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-10-28 09:08:05,890 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0414e50f-624b-4373-895e-2ea340b1c29e/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-10-28 09:08:05,893 INFO L731 BasicCegarLoop]: Path program histogram: [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:08:05,895 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-28 09:08:05,897 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.10 09:08:05 BoogieIcfgContainer [2021-10-28 09:08:05,897 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-28 09:08:05,898 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-28 09:08:05,898 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-28 09:08:05,898 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-28 09:08:05,899 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:07:44" (3/4) ... [2021-10-28 09:08:05,902 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-28 09:08:05,908 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2021-10-28 09:08:05,908 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure cstrreplace [2021-10-28 09:08:05,909 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __bswap_32 [2021-10-28 09:08:05,909 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __bswap_64 [2021-10-28 09:08:05,909 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __uint16_identity [2021-10-28 09:08:05,909 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __uint64_identity [2021-10-28 09:08:05,909 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2021-10-28 09:08:05,910 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __uint32_identity [2021-10-28 09:08:05,913 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 14 nodes and edges [2021-10-28 09:08:05,914 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2021-10-28 09:08:05,914 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-28 09:08:05,914 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-28 09:08:05,954 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0414e50f-624b-4373-895e-2ea340b1c29e/bin/uautomizer-UnR33cPsHg/witness.graphml [2021-10-28 09:08:05,954 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-28 09:08:05,955 INFO L168 Benchmark]: Toolchain (without parser) took 22640.49 ms. Allocated memory was 117.4 MB in the beginning and 255.9 MB in the end (delta: 138.4 MB). Free memory was 80.9 MB in the beginning and 142.9 MB in the end (delta: -61.9 MB). Peak memory consumption was 76.4 MB. Max. memory is 16.1 GB. [2021-10-28 09:08:05,956 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 117.4 MB. Free memory was 88.4 MB in the beginning and 88.4 MB in the end (delta: 27.7 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 09:08:05,956 INFO L168 Benchmark]: CACSL2BoogieTranslator took 561.01 ms. Allocated memory is still 117.4 MB. Free memory was 80.8 MB in the beginning and 87.1 MB in the end (delta: -6.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-28 09:08:05,957 INFO L168 Benchmark]: Boogie Preprocessor took 97.48 ms. Allocated memory is still 117.4 MB. Free memory was 87.1 MB in the beginning and 84.3 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-28 09:08:05,957 INFO L168 Benchmark]: RCFGBuilder took 539.87 ms. Allocated memory is still 117.4 MB. Free memory was 84.3 MB in the beginning and 65.5 MB in the end (delta: 18.8 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. [2021-10-28 09:08:05,958 INFO L168 Benchmark]: TraceAbstraction took 21375.53 ms. Allocated memory was 117.4 MB in the beginning and 255.9 MB in the end (delta: 138.4 MB). Free memory was 65.0 MB in the beginning and 145.8 MB in the end (delta: -80.8 MB). Peak memory consumption was 60.1 MB. Max. memory is 16.1 GB. [2021-10-28 09:08:05,958 INFO L168 Benchmark]: Witness Printer took 56.31 ms. Allocated memory is still 255.9 MB. Free memory was 145.8 MB in the beginning and 142.9 MB in the end (delta: 2.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-28 09:08:05,960 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 117.4 MB. Free memory was 88.4 MB in the beginning and 88.4 MB in the end (delta: 27.7 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 561.01 ms. Allocated memory is still 117.4 MB. Free memory was 80.8 MB in the beginning and 87.1 MB in the end (delta: -6.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 97.48 ms. Allocated memory is still 117.4 MB. Free memory was 87.1 MB in the beginning and 84.3 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 539.87 ms. Allocated memory is still 117.4 MB. Free memory was 84.3 MB in the beginning and 65.5 MB in the end (delta: 18.8 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. * TraceAbstraction took 21375.53 ms. Allocated memory was 117.4 MB in the beginning and 255.9 MB in the end (delta: 138.4 MB). Free memory was 65.0 MB in the beginning and 145.8 MB in the end (delta: -80.8 MB). Peak memory consumption was 60.1 MB. Max. memory is 16.1 GB. * Witness Printer took 56.31 ms. Allocated memory is still 255.9 MB. Free memory was 145.8 MB in the beginning and 142.9 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: 535]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 535]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 538]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 538]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 526]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 517]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 517]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 518]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 518]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 519]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 519]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 9 procedures, 57 locations, 11 error locations. Started 1 CEGAR loops. OverallTime: 21.2s, OverallIterations: 18, TraceHistogramMax: 5, PathProgramHistogramMax: 6, EmptinessCheckTime: 0.0s, AutomataDifference: 8.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 460 SDtfs, 1404 SDslu, 1252 SDs, 0 SdLazy, 6842 SolverSat, 343 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 674 GetRequests, 314 SyntacticMatches, 9 SemanticMatches, 351 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1785 ImplicationChecksByTransitivity, 6.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=76occurred in iteration=17, InterpolantAutomatonStates: 224, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 18 MinimizatonAttempts, 90 StatesRemovedByMinimization, 14 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 7.8s InterpolantComputationTime, 838 NumberOfCodeBlocks, 838 NumberOfCodeBlocksAsserted, 44 NumberOfCheckSat, 811 ConstructedInterpolants, 34 QuantifiedInterpolants, 7030 SizeOfPredicates, 83 NumberOfNonLiveVariables, 1476 ConjunctsInSsa, 300 ConjunctsInUnsatCore, 27 InterpolantComputations, 9 PerfectInterpolantSequences, 162/688 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 11 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-10-28 09:08:06,002 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0414e50f-624b-4373-895e-2ea340b1c29e/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...