./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memcleanup.prp --file ../../sv-benchmarks/c/heap-manipulation/tree-4.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (memcleanup) Using default analysis Version e943c265 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e53cf558-2ee9-455a-bc13-fb95efe5aa9e/bin/uautomizer-j4sWxH34Be/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e53cf558-2ee9-455a-bc13-fb95efe5aa9e/bin/uautomizer-j4sWxH34Be/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e53cf558-2ee9-455a-bc13-fb95efe5aa9e/bin/uautomizer-j4sWxH34Be/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e53cf558-2ee9-455a-bc13-fb95efe5aa9e/bin/uautomizer-j4sWxH34Be/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/heap-manipulation/tree-4.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e53cf558-2ee9-455a-bc13-fb95efe5aa9e/bin/uautomizer-j4sWxH34Be/config/svcomp-MemCleanup-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e53cf558-2ee9-455a-bc13-fb95efe5aa9e/bin/uautomizer-j4sWxH34Be --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-memcleanup) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 93cf6e13715dcd5309cb599b4358d41a64464f02c52b3716bc554a9d0e833f5e ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(valid-memcleanup) --- Real Ultimate output --- This is Ultimate 0.2.1-dev-e943c26 [2021-10-21 19:34:14,858 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-21 19:34:14,859 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-21 19:34:14,894 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-21 19:34:14,894 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-21 19:34:14,896 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-21 19:34:14,898 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-21 19:34:14,900 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-21 19:34:14,902 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-21 19:34:14,904 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-21 19:34:14,905 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-21 19:34:14,906 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-21 19:34:14,907 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-21 19:34:14,908 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-21 19:34:14,910 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-21 19:34:14,911 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-21 19:34:14,913 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-21 19:34:14,914 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-21 19:34:14,916 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-21 19:34:14,918 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-21 19:34:14,921 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-21 19:34:14,927 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-21 19:34:14,934 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-21 19:34:14,935 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-21 19:34:14,939 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-21 19:34:14,942 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-21 19:34:14,943 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-21 19:34:14,944 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-21 19:34:14,945 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-21 19:34:14,947 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-21 19:34:14,948 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-21 19:34:14,949 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-21 19:34:14,951 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-21 19:34:14,952 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-21 19:34:14,954 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-21 19:34:14,955 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-21 19:34:14,956 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-21 19:34:14,957 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-21 19:34:14,957 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-21 19:34:14,958 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-21 19:34:14,959 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-21 19:34:14,960 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e53cf558-2ee9-455a-bc13-fb95efe5aa9e/bin/uautomizer-j4sWxH34Be/config/svcomp-MemCleanup-32bit-Automizer_Default.epf [2021-10-21 19:34:15,000 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-21 19:34:15,000 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-21 19:34:15,001 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-21 19:34:15,001 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-21 19:34:15,002 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-21 19:34:15,002 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-21 19:34:15,003 INFO L138 SettingsManager]: * Use SBE=true [2021-10-21 19:34:15,003 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-21 19:34:15,003 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-21 19:34:15,003 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-21 19:34:15,003 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-21 19:34:15,004 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-21 19:34:15,004 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-21 19:34:15,004 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-21 19:34:15,004 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-21 19:34:15,004 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-21 19:34:15,004 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-21 19:34:15,005 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-21 19:34:15,005 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-21 19:34:15,005 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-21 19:34:15,005 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-21 19:34:15,005 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-21 19:34:15,006 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-21 19:34:15,006 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-21 19:34:15,006 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-21 19:34:15,006 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-21 19:34:15,006 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-21 19:34:15,007 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-21 19:34:15,007 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_e53cf558-2ee9-455a-bc13-fb95efe5aa9e/bin/uautomizer-j4sWxH34Be/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e53cf558-2ee9-455a-bc13-fb95efe5aa9e/bin/uautomizer-j4sWxH34Be Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-memcleanup) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 93cf6e13715dcd5309cb599b4358d41a64464f02c52b3716bc554a9d0e833f5e [2021-10-21 19:34:15,289 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-21 19:34:15,326 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-21 19:34:15,328 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-21 19:34:15,329 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-21 19:34:15,332 INFO L275 PluginConnector]: CDTParser initialized [2021-10-21 19:34:15,334 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e53cf558-2ee9-455a-bc13-fb95efe5aa9e/bin/uautomizer-j4sWxH34Be/../../sv-benchmarks/c/heap-manipulation/tree-4.i [2021-10-21 19:34:15,399 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e53cf558-2ee9-455a-bc13-fb95efe5aa9e/bin/uautomizer-j4sWxH34Be/data/aa198281d/e141e027585847f99df2d36ab230a785/FLAG7788f744d [2021-10-21 19:34:15,973 INFO L306 CDTParser]: Found 1 translation units. [2021-10-21 19:34:15,973 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e53cf558-2ee9-455a-bc13-fb95efe5aa9e/sv-benchmarks/c/heap-manipulation/tree-4.i [2021-10-21 19:34:15,986 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e53cf558-2ee9-455a-bc13-fb95efe5aa9e/bin/uautomizer-j4sWxH34Be/data/aa198281d/e141e027585847f99df2d36ab230a785/FLAG7788f744d [2021-10-21 19:34:16,276 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e53cf558-2ee9-455a-bc13-fb95efe5aa9e/bin/uautomizer-j4sWxH34Be/data/aa198281d/e141e027585847f99df2d36ab230a785 [2021-10-21 19:34:16,283 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-21 19:34:16,286 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-21 19:34:16,290 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-21 19:34:16,290 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-21 19:34:16,293 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-21 19:34:16,294 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 07:34:16" (1/1) ... [2021-10-21 19:34:16,296 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@22b1d70 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:34:16, skipping insertion in model container [2021-10-21 19:34:16,297 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 07:34:16" (1/1) ... [2021-10-21 19:34:16,303 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-21 19:34:16,368 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-21 19:34:16,681 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e53cf558-2ee9-455a-bc13-fb95efe5aa9e/sv-benchmarks/c/heap-manipulation/tree-4.i[22626,22639] [2021-10-21 19:34:16,703 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-21 19:34:16,711 INFO L203 MainTranslator]: Completed pre-run [2021-10-21 19:34:16,743 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e53cf558-2ee9-455a-bc13-fb95efe5aa9e/sv-benchmarks/c/heap-manipulation/tree-4.i[22626,22639] [2021-10-21 19:34:16,755 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-21 19:34:16,785 INFO L208 MainTranslator]: Completed translation [2021-10-21 19:34:16,785 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:34:16 WrapperNode [2021-10-21 19:34:16,785 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-21 19:34:16,786 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-21 19:34:16,786 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-21 19:34:16,787 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-21 19:34:16,799 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:34:16" (1/1) ... [2021-10-21 19:34:16,799 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:34:16" (1/1) ... [2021-10-21 19:34:16,814 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:34:16" (1/1) ... [2021-10-21 19:34:16,815 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:34:16" (1/1) ... [2021-10-21 19:34:16,835 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:34:16" (1/1) ... [2021-10-21 19:34:16,842 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:34:16" (1/1) ... [2021-10-21 19:34:16,846 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:34:16" (1/1) ... [2021-10-21 19:34:16,853 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-21 19:34:16,854 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-21 19:34:16,854 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-21 19:34:16,854 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-21 19:34:16,863 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:34:16" (1/1) ... [2021-10-21 19:34:16,871 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-21 19:34:16,883 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e53cf558-2ee9-455a-bc13-fb95efe5aa9e/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:34:16,910 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e53cf558-2ee9-455a-bc13-fb95efe5aa9e/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-21 19:34:16,937 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e53cf558-2ee9-455a-bc13-fb95efe5aa9e/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-21 19:34:16,958 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-10-21 19:34:16,959 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-21 19:34:16,960 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-10-21 19:34:16,960 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-10-21 19:34:16,961 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-10-21 19:34:16,961 INFO L138 BoogieDeclarations]: Found implementation of procedure fail [2021-10-21 19:34:16,962 INFO L138 BoogieDeclarations]: Found implementation of procedure inspect [2021-10-21 19:34:16,962 INFO L138 BoogieDeclarations]: Found implementation of procedure create_tree [2021-10-21 19:34:16,962 INFO L138 BoogieDeclarations]: Found implementation of procedure free_tree [2021-10-21 19:34:16,962 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-10-21 19:34:16,963 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-10-21 19:34:16,963 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-10-21 19:34:16,964 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-10-21 19:34:16,964 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-10-21 19:34:16,964 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-10-21 19:34:16,964 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-21 19:34:16,964 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-10-21 19:34:16,964 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-10-21 19:34:16,965 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-10-21 19:34:16,965 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-10-21 19:34:16,965 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-10-21 19:34:16,965 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-10-21 19:34:16,965 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-10-21 19:34:16,965 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-10-21 19:34:16,966 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-10-21 19:34:16,966 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-10-21 19:34:16,966 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-10-21 19:34:16,966 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-10-21 19:34:16,966 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-10-21 19:34:16,966 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-10-21 19:34:16,967 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-10-21 19:34:16,967 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-10-21 19:34:16,967 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-10-21 19:34:16,967 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-10-21 19:34:16,967 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-10-21 19:34:16,967 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-10-21 19:34:16,968 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-10-21 19:34:16,968 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-10-21 19:34:16,968 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-10-21 19:34:16,968 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-10-21 19:34:16,968 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-10-21 19:34:16,969 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-10-21 19:34:16,969 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-10-21 19:34:16,969 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-10-21 19:34:16,969 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-10-21 19:34:16,970 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-10-21 19:34:16,970 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-10-21 19:34:16,970 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-10-21 19:34:16,970 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-10-21 19:34:16,970 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-10-21 19:34:16,971 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-10-21 19:34:16,971 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-10-21 19:34:16,972 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-10-21 19:34:16,972 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-10-21 19:34:16,972 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-10-21 19:34:16,972 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-10-21 19:34:16,973 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-10-21 19:34:16,973 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-10-21 19:34:16,973 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-10-21 19:34:16,973 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-10-21 19:34:16,974 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-10-21 19:34:16,974 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-10-21 19:34:16,974 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-10-21 19:34:16,974 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-10-21 19:34:16,974 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-10-21 19:34:16,975 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-10-21 19:34:16,975 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-10-21 19:34:16,976 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-10-21 19:34:16,976 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-10-21 19:34:16,978 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-10-21 19:34:16,979 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-10-21 19:34:16,979 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-10-21 19:34:16,979 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2021-10-21 19:34:16,979 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-10-21 19:34:16,979 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-10-21 19:34:16,980 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-10-21 19:34:16,980 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-10-21 19:34:16,981 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-10-21 19:34:16,981 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-10-21 19:34:16,981 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-10-21 19:34:16,981 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-10-21 19:34:16,981 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-10-21 19:34:16,982 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-10-21 19:34:16,982 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-10-21 19:34:16,983 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-10-21 19:34:16,983 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-10-21 19:34:16,983 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-10-21 19:34:16,983 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-10-21 19:34:16,984 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-10-21 19:34:16,984 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-10-21 19:34:16,984 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-10-21 19:34:16,984 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-10-21 19:34:16,984 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-10-21 19:34:16,984 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-10-21 19:34:16,985 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-10-21 19:34:16,985 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-10-21 19:34:16,985 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-10-21 19:34:16,985 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-10-21 19:34:16,985 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-10-21 19:34:16,985 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-10-21 19:34:16,986 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-10-21 19:34:16,986 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-10-21 19:34:16,986 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-10-21 19:34:16,986 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-10-21 19:34:16,986 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-10-21 19:34:16,986 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-10-21 19:34:16,987 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-10-21 19:34:16,987 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-10-21 19:34:16,987 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-10-21 19:34:16,988 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-10-21 19:34:16,988 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-10-21 19:34:16,988 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-10-21 19:34:16,989 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-10-21 19:34:16,989 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-10-21 19:34:16,989 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-10-21 19:34:16,989 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-10-21 19:34:16,989 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-10-21 19:34:16,990 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-10-21 19:34:16,990 INFO L130 BoogieDeclarations]: Found specification of procedure fail [2021-10-21 19:34:16,990 INFO L130 BoogieDeclarations]: Found specification of procedure inspect [2021-10-21 19:34:16,990 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-21 19:34:16,990 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-21 19:34:16,990 INFO L130 BoogieDeclarations]: Found specification of procedure create_tree [2021-10-21 19:34:16,990 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-21 19:34:16,991 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-21 19:34:16,991 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-21 19:34:16,991 INFO L130 BoogieDeclarations]: Found specification of procedure free_tree [2021-10-21 19:34:16,992 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-21 19:34:16,993 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-10-21 19:34:16,995 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-10-21 19:34:16,996 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-21 19:34:16,996 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-21 19:34:17,736 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-21 19:34:17,738 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2021-10-21 19:34:17,741 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 07:34:17 BoogieIcfgContainer [2021-10-21 19:34:17,741 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-21 19:34:17,745 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-21 19:34:17,745 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-21 19:34:17,756 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-21 19:34:17,756 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.10 07:34:16" (1/3) ... [2021-10-21 19:34:17,757 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fb45916 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 07:34:17, skipping insertion in model container [2021-10-21 19:34:17,758 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:34:16" (2/3) ... [2021-10-21 19:34:17,758 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fb45916 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 07:34:17, skipping insertion in model container [2021-10-21 19:34:17,758 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 07:34:17" (3/3) ... [2021-10-21 19:34:17,760 INFO L111 eAbstractionObserver]: Analyzing ICFG tree-4.i [2021-10-21 19:34:17,770 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-21 19:34:17,771 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 65 error locations. [2021-10-21 19:34:17,862 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-21 19:34:17,873 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-21 19:34:17,890 INFO L340 AbstractCegarLoop]: Starting to check reachability of 65 error locations. [2021-10-21 19:34:17,923 INFO L276 IsEmpty]: Start isEmpty. Operand has 164 states, 84 states have (on average 2.107142857142857) internal successors, (177), 152 states have internal predecessors, (177), 8 states have call successors, (8), 6 states have call predecessors, (8), 6 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-10-21 19:34:17,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-21 19:34:17,932 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:34:17,933 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:34:17,934 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting create_treeErr8REQUIRES_VIOLATION === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK, create_treeErr0REQUIRES_VIOLATION, create_treeErr1REQUIRES_VIOLATION (and 61 more)] === [2021-10-21 19:34:17,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:34:17,940 INFO L82 PathProgramCache]: Analyzing trace with hash -557652933, now seen corresponding path program 1 times [2021-10-21 19:34:17,950 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:34:17,951 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161499642] [2021-10-21 19:34:17,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:34:17,952 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:34:18,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:34:18,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:34:18,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:34:18,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:34:18,197 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:34:18,197 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161499642] [2021-10-21 19:34:18,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161499642] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:34:18,198 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:34:18,198 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-21 19:34:18,200 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141161188] [2021-10-21 19:34:18,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-21 19:34:18,205 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:34:18,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-21 19:34:18,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 19:34:18,222 INFO L87 Difference]: Start difference. First operand has 164 states, 84 states have (on average 2.107142857142857) internal successors, (177), 152 states have internal predecessors, (177), 8 states have call successors, (8), 6 states have call predecessors, (8), 6 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:34:18,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:34:18,568 INFO L93 Difference]: Finished difference Result 216 states and 237 transitions. [2021-10-21 19:34:18,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-21 19:34:18,570 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 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 10 [2021-10-21 19:34:18,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:34:18,581 INFO L225 Difference]: With dead ends: 216 [2021-10-21 19:34:18,582 INFO L226 Difference]: Without dead ends: 211 [2021-10-21 19:34:18,583 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 19:34:18,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-10-21 19:34:18,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 169. [2021-10-21 19:34:18,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 91 states have (on average 1.901098901098901) internal successors, (173), 157 states have internal predecessors, (173), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-10-21 19:34:18,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 186 transitions. [2021-10-21 19:34:18,635 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 186 transitions. Word has length 10 [2021-10-21 19:34:18,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:34:18,635 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 186 transitions. [2021-10-21 19:34:18,636 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:34:18,636 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 186 transitions. [2021-10-21 19:34:18,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-21 19:34:18,636 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:34:18,637 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:34:18,637 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-21 19:34:18,637 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting create_treeErr8REQUIRES_VIOLATION === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK, create_treeErr0REQUIRES_VIOLATION, create_treeErr1REQUIRES_VIOLATION (and 61 more)] === [2021-10-21 19:34:18,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:34:18,638 INFO L82 PathProgramCache]: Analyzing trace with hash -108387509, now seen corresponding path program 1 times [2021-10-21 19:34:18,638 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:34:18,638 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169955277] [2021-10-21 19:34:18,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:34:18,639 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:34:18,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:34:18,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:34:18,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:34:18,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:34:18,720 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:34:18,720 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169955277] [2021-10-21 19:34:18,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169955277] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:34:18,721 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:34:18,721 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:34:18,721 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252268031] [2021-10-21 19:34:18,722 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:34:18,723 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:34:18,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:34:18,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:34:18,724 INFO L87 Difference]: Start difference. First operand 169 states and 186 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:34:19,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:34:19,105 INFO L93 Difference]: Finished difference Result 209 states and 227 transitions. [2021-10-21 19:34:19,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-21 19:34:19,106 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (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 11 [2021-10-21 19:34:19,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:34:19,108 INFO L225 Difference]: With dead ends: 209 [2021-10-21 19:34:19,108 INFO L226 Difference]: Without dead ends: 209 [2021-10-21 19:34:19,109 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 37.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:34:19,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2021-10-21 19:34:19,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 169. [2021-10-21 19:34:19,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 91 states have (on average 1.8571428571428572) internal successors, (169), 157 states have internal predecessors, (169), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-10-21 19:34:19,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 182 transitions. [2021-10-21 19:34:19,122 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 182 transitions. Word has length 11 [2021-10-21 19:34:19,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:34:19,122 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 182 transitions. [2021-10-21 19:34:19,122 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:34:19,123 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 182 transitions. [2021-10-21 19:34:19,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-21 19:34:19,123 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:34:19,123 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:34:19,123 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-21 19:34:19,124 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting create_treeErr0REQUIRES_VIOLATION === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK, create_treeErr0REQUIRES_VIOLATION, create_treeErr1REQUIRES_VIOLATION (and 61 more)] === [2021-10-21 19:34:19,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:34:19,124 INFO L82 PathProgramCache]: Analyzing trace with hash -108386450, now seen corresponding path program 1 times [2021-10-21 19:34:19,124 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:34:19,125 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519718582] [2021-10-21 19:34:19,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:34:19,125 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:34:19,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:34:19,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:34:19,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:34:19,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:34:19,191 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:34:19,191 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519718582] [2021-10-21 19:34:19,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519718582] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:34:19,192 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:34:19,192 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-21 19:34:19,192 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162139493] [2021-10-21 19:34:19,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:34:19,193 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:34:19,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:34:19,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:34:19,194 INFO L87 Difference]: Start difference. First operand 169 states and 182 transitions. 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, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:34:19,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:34:19,572 INFO L93 Difference]: Finished difference Result 206 states and 225 transitions. [2021-10-21 19:34:19,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:34:19,572 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, (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 11 [2021-10-21 19:34:19,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:34:19,574 INFO L225 Difference]: With dead ends: 206 [2021-10-21 19:34:19,574 INFO L226 Difference]: Without dead ends: 206 [2021-10-21 19:34:19,574 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.8ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:34:19,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-10-21 19:34:19,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 162. [2021-10-21 19:34:19,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 93 states have (on average 1.7634408602150538) internal successors, (164), 150 states have internal predecessors, (164), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-10-21 19:34:19,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 177 transitions. [2021-10-21 19:34:19,585 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 177 transitions. Word has length 11 [2021-10-21 19:34:19,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:34:19,586 INFO L470 AbstractCegarLoop]: Abstraction has 162 states and 177 transitions. [2021-10-21 19:34:19,586 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, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:34:19,586 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 177 transitions. [2021-10-21 19:34:19,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-21 19:34:19,587 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:34:19,587 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:34:19,587 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-21 19:34:19,587 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting create_treeErr1REQUIRES_VIOLATION === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK, create_treeErr0REQUIRES_VIOLATION, create_treeErr1REQUIRES_VIOLATION (and 61 more)] === [2021-10-21 19:34:19,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:34:19,588 INFO L82 PathProgramCache]: Analyzing trace with hash -108386449, now seen corresponding path program 1 times [2021-10-21 19:34:19,588 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:34:19,588 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784311227] [2021-10-21 19:34:19,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:34:19,589 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:34:19,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:34:19,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:34:19,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:34:19,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:34:19,660 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:34:19,660 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784311227] [2021-10-21 19:34:19,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784311227] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:34:19,660 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:34:19,661 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-21 19:34:19,661 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239127936] [2021-10-21 19:34:19,661 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:34:19,662 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:34:19,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:34:19,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:34:19,663 INFO L87 Difference]: Start difference. First operand 162 states and 177 transitions. 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, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:34:20,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:34:20,060 INFO L93 Difference]: Finished difference Result 225 states and 244 transitions. [2021-10-21 19:34:20,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:34:20,061 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, (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 11 [2021-10-21 19:34:20,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:34:20,063 INFO L225 Difference]: With dead ends: 225 [2021-10-21 19:34:20,063 INFO L226 Difference]: Without dead ends: 225 [2021-10-21 19:34:20,063 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.9ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:34:20,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2021-10-21 19:34:20,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 173. [2021-10-21 19:34:20,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 108 states have (on average 1.6851851851851851) internal successors, (182), 161 states have internal predecessors, (182), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-10-21 19:34:20,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 195 transitions. [2021-10-21 19:34:20,073 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 195 transitions. Word has length 11 [2021-10-21 19:34:20,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:34:20,073 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 195 transitions. [2021-10-21 19:34:20,074 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, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:34:20,074 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 195 transitions. [2021-10-21 19:34:20,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-21 19:34:20,075 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:34:20,075 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:34:20,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-21 19:34:20,075 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting create_treeErr4REQUIRES_VIOLATION === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK, create_treeErr0REQUIRES_VIOLATION, create_treeErr1REQUIRES_VIOLATION (and 61 more)] === [2021-10-21 19:34:20,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:34:20,076 INFO L82 PathProgramCache]: Analyzing trace with hash 874689698, now seen corresponding path program 1 times [2021-10-21 19:34:20,076 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:34:20,077 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122592051] [2021-10-21 19:34:20,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:34:20,077 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:34:20,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:34:20,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:34:20,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:34:20,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:34:20,172 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:34:20,172 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122592051] [2021-10-21 19:34:20,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122592051] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:34:20,173 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:34:20,173 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:34:20,173 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534145934] [2021-10-21 19:34:20,173 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:34:20,173 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:34:20,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:34:20,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:34:20,175 INFO L87 Difference]: Start difference. First operand 173 states and 195 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:34:20,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:34:20,513 INFO L93 Difference]: Finished difference Result 220 states and 247 transitions. [2021-10-21 19:34:20,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-21 19:34:20,514 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 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 [2021-10-21 19:34:20,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:34:20,516 INFO L225 Difference]: With dead ends: 220 [2021-10-21 19:34:20,516 INFO L226 Difference]: Without dead ends: 220 [2021-10-21 19:34:20,516 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 41.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:34:20,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-10-21 19:34:20,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 177. [2021-10-21 19:34:20,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 112 states have (on average 1.6607142857142858) internal successors, (186), 165 states have internal predecessors, (186), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-10-21 19:34:20,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 199 transitions. [2021-10-21 19:34:20,532 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 199 transitions. Word has length 14 [2021-10-21 19:34:20,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:34:20,533 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 199 transitions. [2021-10-21 19:34:20,533 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:34:20,533 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 199 transitions. [2021-10-21 19:34:20,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-21 19:34:20,534 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:34:20,534 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:34:20,535 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-21 19:34:20,535 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting failErr0ASSERT_VIOLATIONMEMORY_LEAK === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK, create_treeErr0REQUIRES_VIOLATION, create_treeErr1REQUIRES_VIOLATION (and 61 more)] === [2021-10-21 19:34:20,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:34:20,536 INFO L82 PathProgramCache]: Analyzing trace with hash -388091640, now seen corresponding path program 1 times [2021-10-21 19:34:20,536 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:34:20,536 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669209758] [2021-10-21 19:34:20,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:34:20,537 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:34:20,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:34:20,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:34:20,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:34:20,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-10-21 19:34:20,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:34:20,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:34:20,773 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:34:20,773 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669209758] [2021-10-21 19:34:20,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669209758] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:34:20,774 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:34:20,774 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-10-21 19:34:20,774 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247245248] [2021-10-21 19:34:20,775 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-21 19:34:20,775 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:34:20,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-21 19:34:20,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-10-21 19:34:20,776 INFO L87 Difference]: Start difference. First operand 177 states and 199 transitions. Second operand has 8 states, 8 states have (on average 1.75) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-21 19:34:21,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:34:21,403 INFO L93 Difference]: Finished difference Result 220 states and 243 transitions. [2021-10-21 19:34:21,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-21 19:34:21,404 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 21 [2021-10-21 19:34:21,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:34:21,406 INFO L225 Difference]: With dead ends: 220 [2021-10-21 19:34:21,406 INFO L226 Difference]: Without dead ends: 213 [2021-10-21 19:34:21,406 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 195.1ms TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-10-21 19:34:21,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-10-21 19:34:21,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 170. [2021-10-21 19:34:21,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 106 states have (on average 1.6886792452830188) internal successors, (179), 159 states have internal predecessors, (179), 8 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-21 19:34:21,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 191 transitions. [2021-10-21 19:34:21,412 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 191 transitions. Word has length 21 [2021-10-21 19:34:21,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:34:21,413 INFO L470 AbstractCegarLoop]: Abstraction has 170 states and 191 transitions. [2021-10-21 19:34:21,413 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-21 19:34:21,413 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 191 transitions. [2021-10-21 19:34:21,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-21 19:34:21,414 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:34:21,414 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:34:21,414 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-21 19:34:21,415 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting create_treeErr4REQUIRES_VIOLATION === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK, create_treeErr0REQUIRES_VIOLATION, create_treeErr1REQUIRES_VIOLATION (and 61 more)] === [2021-10-21 19:34:21,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:34:21,415 INFO L82 PathProgramCache]: Analyzing trace with hash 53276323, now seen corresponding path program 1 times [2021-10-21 19:34:21,416 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:34:21,416 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536651621] [2021-10-21 19:34:21,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:34:21,416 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:34:21,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:34:21,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:34:21,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:34:21,531 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:34:21,531 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:34:21,531 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536651621] [2021-10-21 19:34:21,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536651621] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:34:21,532 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569274853] [2021-10-21 19:34:21,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:34:21,532 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:34:21,533 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e53cf558-2ee9-455a-bc13-fb95efe5aa9e/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:34:21,544 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e53cf558-2ee9-455a-bc13-fb95efe5aa9e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:34:21,567 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e53cf558-2ee9-455a-bc13-fb95efe5aa9e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-21 19:34:21,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:34:21,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-21 19:34:21,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:34:21,815 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 [2021-10-21 19:34:21,902 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-10-21 19:34:21,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-10-21 19:34:22,019 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:34:22,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [569274853] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:34:22,020 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:34:22,020 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2021-10-21 19:34:22,020 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484798403] [2021-10-21 19:34:22,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-21 19:34:22,021 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:34:22,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-21 19:34:22,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-10-21 19:34:22,022 INFO L87 Difference]: Start difference. First operand 170 states and 191 transitions. Second operand has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:34:22,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:34:22,568 INFO L93 Difference]: Finished difference Result 222 states and 249 transitions. [2021-10-21 19:34:22,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-21 19:34:22,568 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2021-10-21 19:34:22,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:34:22,570 INFO L225 Difference]: With dead ends: 222 [2021-10-21 19:34:22,570 INFO L226 Difference]: Without dead ends: 222 [2021-10-21 19:34:22,570 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 67.5ms TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-10-21 19:34:22,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2021-10-21 19:34:22,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 169. [2021-10-21 19:34:22,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 106 states have (on average 1.679245283018868) internal successors, (178), 158 states have internal predecessors, (178), 8 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-21 19:34:22,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 190 transitions. [2021-10-21 19:34:22,574 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 190 transitions. Word has length 23 [2021-10-21 19:34:22,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:34:22,574 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 190 transitions. [2021-10-21 19:34:22,575 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:34:22,575 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 190 transitions. [2021-10-21 19:34:22,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-21 19:34:22,575 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:34:22,575 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:34:22,612 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e53cf558-2ee9-455a-bc13-fb95efe5aa9e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-21 19:34:22,776 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e53cf558-2ee9-455a-bc13-fb95efe5aa9e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-10-21 19:34:22,776 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting create_treeErr5REQUIRES_VIOLATION === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK, create_treeErr0REQUIRES_VIOLATION, create_treeErr1REQUIRES_VIOLATION (and 61 more)] === [2021-10-21 19:34:22,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:34:22,777 INFO L82 PathProgramCache]: Analyzing trace with hash 53276324, now seen corresponding path program 1 times [2021-10-21 19:34:22,777 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:34:22,777 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37269406] [2021-10-21 19:34:22,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:34:22,777 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:34:22,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:34:22,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:34:22,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:34:22,939 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:34:22,939 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:34:22,939 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37269406] [2021-10-21 19:34:22,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37269406] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:34:22,940 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119095640] [2021-10-21 19:34:22,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:34:22,940 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:34:22,940 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e53cf558-2ee9-455a-bc13-fb95efe5aa9e/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:34:22,941 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e53cf558-2ee9-455a-bc13-fb95efe5aa9e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:34:22,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e53cf558-2ee9-455a-bc13-fb95efe5aa9e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-21 19:34:23,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:34:23,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-21 19:34:23,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:34:23,145 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 [2021-10-21 19:34:23,156 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 [2021-10-21 19:34:23,347 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-21 19:34:23,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 24 [2021-10-21 19:34:23,368 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-21 19:34:23,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 21 treesize of output 21 [2021-10-21 19:34:23,539 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:34:23,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [119095640] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:34:23,540 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:34:23,540 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2021-10-21 19:34:23,541 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147392926] [2021-10-21 19:34:23,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-21 19:34:23,542 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:34:23,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-21 19:34:23,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-10-21 19:34:23,543 INFO L87 Difference]: Start difference. First operand 169 states and 190 transitions. Second operand has 8 states, 7 states have (on average 5.0) internal successors, (35), 7 states have internal predecessors, (35), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:34:24,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:34:24,127 INFO L93 Difference]: Finished difference Result 230 states and 249 transitions. [2021-10-21 19:34:24,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-21 19:34:24,128 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 5.0) internal successors, (35), 7 states have internal predecessors, (35), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2021-10-21 19:34:24,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:34:24,130 INFO L225 Difference]: With dead ends: 230 [2021-10-21 19:34:24,130 INFO L226 Difference]: Without dead ends: 230 [2021-10-21 19:34:24,130 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 101.0ms TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-10-21 19:34:24,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2021-10-21 19:34:24,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 168. [2021-10-21 19:34:24,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 106 states have (on average 1.669811320754717) internal successors, (177), 157 states have internal predecessors, (177), 8 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-21 19:34:24,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 189 transitions. [2021-10-21 19:34:24,136 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 189 transitions. Word has length 23 [2021-10-21 19:34:24,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:34:24,136 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 189 transitions. [2021-10-21 19:34:24,137 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 5.0) internal successors, (35), 7 states have internal predecessors, (35), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:34:24,137 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 189 transitions. [2021-10-21 19:34:24,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-21 19:34:24,138 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:34:24,138 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:34:24,174 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e53cf558-2ee9-455a-bc13-fb95efe5aa9e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-21 19:34:24,338 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e53cf558-2ee9-455a-bc13-fb95efe5aa9e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:34:24,339 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting create_treeErr14REQUIRES_VIOLATION === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK, create_treeErr0REQUIRES_VIOLATION, create_treeErr1REQUIRES_VIOLATION (and 61 more)] === [2021-10-21 19:34:24,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:34:24,339 INFO L82 PathProgramCache]: Analyzing trace with hash -190246733, now seen corresponding path program 1 times [2021-10-21 19:34:24,339 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:34:24,339 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883645494] [2021-10-21 19:34:24,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:34:24,340 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:34:24,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:34:24,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:34:24,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:34:24,422 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-21 19:34:24,422 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:34:24,422 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883645494] [2021-10-21 19:34:24,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883645494] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:34:24,423 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:34:24,423 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-21 19:34:24,423 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279424166] [2021-10-21 19:34:24,424 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-21 19:34:24,424 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:34:24,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-21 19:34:24,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-21 19:34:24,425 INFO L87 Difference]: Start difference. First operand 168 states and 189 transitions. Second operand has 6 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:34:24,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:34:24,862 INFO L93 Difference]: Finished difference Result 205 states and 228 transitions. [2021-10-21 19:34:24,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-21 19:34:24,862 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 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 26 [2021-10-21 19:34:24,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:34:24,866 INFO L225 Difference]: With dead ends: 205 [2021-10-21 19:34:24,866 INFO L226 Difference]: Without dead ends: 205 [2021-10-21 19:34:24,867 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 35.6ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-10-21 19:34:24,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-10-21 19:34:24,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 167. [2021-10-21 19:34:24,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 106 states have (on average 1.650943396226415) internal successors, (175), 156 states have internal predecessors, (175), 8 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-21 19:34:24,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 187 transitions. [2021-10-21 19:34:24,874 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 187 transitions. Word has length 26 [2021-10-21 19:34:24,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:34:24,875 INFO L470 AbstractCegarLoop]: Abstraction has 167 states and 187 transitions. [2021-10-21 19:34:24,876 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:34:24,876 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 187 transitions. [2021-10-21 19:34:24,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-21 19:34:24,882 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:34:24,882 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:34:24,882 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-10-21 19:34:24,883 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting create_treeErr15REQUIRES_VIOLATION === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK, create_treeErr0REQUIRES_VIOLATION, create_treeErr1REQUIRES_VIOLATION (and 61 more)] === [2021-10-21 19:34:24,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:34:24,883 INFO L82 PathProgramCache]: Analyzing trace with hash -190246732, now seen corresponding path program 1 times [2021-10-21 19:34:24,884 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:34:24,884 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067253375] [2021-10-21 19:34:24,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:34:24,884 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:34:24,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:34:24,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:34:24,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:34:25,000 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-21 19:34:25,000 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:34:25,001 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067253375] [2021-10-21 19:34:25,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067253375] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:34:25,001 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:34:25,001 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-21 19:34:25,002 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477137278] [2021-10-21 19:34:25,002 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-21 19:34:25,002 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:34:25,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-21 19:34:25,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-21 19:34:25,006 INFO L87 Difference]: Start difference. First operand 167 states and 187 transitions. Second operand has 6 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:34:25,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:34:25,463 INFO L93 Difference]: Finished difference Result 204 states and 226 transitions. [2021-10-21 19:34:25,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-21 19:34:25,463 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 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 26 [2021-10-21 19:34:25,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:34:25,465 INFO L225 Difference]: With dead ends: 204 [2021-10-21 19:34:25,465 INFO L226 Difference]: Without dead ends: 204 [2021-10-21 19:34:25,465 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 54.0ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-10-21 19:34:25,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-10-21 19:34:25,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 166. [2021-10-21 19:34:25,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 106 states have (on average 1.6320754716981132) internal successors, (173), 155 states have internal predecessors, (173), 8 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-21 19:34:25,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 185 transitions. [2021-10-21 19:34:25,478 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 185 transitions. Word has length 26 [2021-10-21 19:34:25,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:34:25,479 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 185 transitions. [2021-10-21 19:34:25,479 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:34:25,479 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 185 transitions. [2021-10-21 19:34:25,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-21 19:34:25,480 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:34:25,480 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:34:25,480 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-10-21 19:34:25,481 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ENSURES_VIOLATIONMEMORY_LEAK === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK, create_treeErr0REQUIRES_VIOLATION, create_treeErr1REQUIRES_VIOLATION (and 61 more)] === [2021-10-21 19:34:25,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:34:25,481 INFO L82 PathProgramCache]: Analyzing trace with hash -1822618347, now seen corresponding path program 1 times [2021-10-21 19:34:25,482 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:34:25,482 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336502548] [2021-10-21 19:34:25,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:34:25,482 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:34:25,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:34:25,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:34:25,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:34:25,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-10-21 19:34:25,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:34:25,548 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:34:25,548 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:34:25,548 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336502548] [2021-10-21 19:34:25,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336502548] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:34:25,549 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:34:25,549 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-21 19:34:25,549 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210729524] [2021-10-21 19:34:25,550 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-21 19:34:25,550 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:34:25,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-21 19:34:25,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:34:25,551 INFO L87 Difference]: Start difference. First operand 166 states and 185 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-21 19:34:25,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:34:25,952 INFO L93 Difference]: Finished difference Result 210 states and 224 transitions. [2021-10-21 19:34:25,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:34:25,953 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 26 [2021-10-21 19:34:25,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:34:25,955 INFO L225 Difference]: With dead ends: 210 [2021-10-21 19:34:25,955 INFO L226 Difference]: Without dead ends: 210 [2021-10-21 19:34:25,955 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 44.2ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-21 19:34:25,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-10-21 19:34:25,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 165. [2021-10-21 19:34:25,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 105 states have (on average 1.619047619047619) internal successors, (170), 154 states have internal predecessors, (170), 8 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-21 19:34:25,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 182 transitions. [2021-10-21 19:34:25,961 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 182 transitions. Word has length 26 [2021-10-21 19:34:25,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:34:25,961 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 182 transitions. [2021-10-21 19:34:25,961 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-21 19:34:25,961 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 182 transitions. [2021-10-21 19:34:25,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-21 19:34:25,962 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:34:25,962 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:34:25,962 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-10-21 19:34:25,962 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting create_treeErr18REQUIRES_VIOLATION === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK, create_treeErr0REQUIRES_VIOLATION, create_treeErr1REQUIRES_VIOLATION (and 61 more)] === [2021-10-21 19:34:25,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:34:25,963 INFO L82 PathProgramCache]: Analyzing trace with hash 1716475476, now seen corresponding path program 1 times [2021-10-21 19:34:25,963 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:34:25,963 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98755883] [2021-10-21 19:34:25,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:34:25,963 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:34:25,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:34:26,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:34:26,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:34:26,093 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:34:26,093 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:34:26,093 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98755883] [2021-10-21 19:34:26,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98755883] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:34:26,093 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:34:26,094 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-10-21 19:34:26,094 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741264219] [2021-10-21 19:34:26,094 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-21 19:34:26,094 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:34:26,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-21 19:34:26,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-10-21 19:34:26,095 INFO L87 Difference]: Start difference. First operand 165 states and 182 transitions. Second operand has 9 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:34:26,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:34:26,738 INFO L93 Difference]: Finished difference Result 204 states and 222 transitions. [2021-10-21 19:34:26,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-21 19:34:26,738 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2021-10-21 19:34:26,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:34:26,740 INFO L225 Difference]: With dead ends: 204 [2021-10-21 19:34:26,740 INFO L226 Difference]: Without dead ends: 204 [2021-10-21 19:34:26,741 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 125.0ms TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-10-21 19:34:26,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-10-21 19:34:26,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 165. [2021-10-21 19:34:26,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 105 states have (on average 1.6095238095238096) internal successors, (169), 154 states have internal predecessors, (169), 8 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-21 19:34:26,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 181 transitions. [2021-10-21 19:34:26,746 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 181 transitions. Word has length 29 [2021-10-21 19:34:26,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:34:26,747 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 181 transitions. [2021-10-21 19:34:26,747 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:34:26,747 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 181 transitions. [2021-10-21 19:34:26,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-21 19:34:26,748 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:34:26,748 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:34:26,748 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-10-21 19:34:26,748 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting create_treeErr19REQUIRES_VIOLATION === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK, create_treeErr0REQUIRES_VIOLATION, create_treeErr1REQUIRES_VIOLATION (and 61 more)] === [2021-10-21 19:34:26,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:34:26,749 INFO L82 PathProgramCache]: Analyzing trace with hash 1716475477, now seen corresponding path program 1 times [2021-10-21 19:34:26,749 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:34:26,749 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126691504] [2021-10-21 19:34:26,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:34:26,750 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:34:26,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:34:26,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:34:26,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:34:26,904 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:34:26,904 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:34:26,907 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126691504] [2021-10-21 19:34:26,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126691504] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:34:26,907 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:34:26,908 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-10-21 19:34:26,908 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636127098] [2021-10-21 19:34:26,908 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-21 19:34:26,908 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:34:26,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-21 19:34:26,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-10-21 19:34:26,910 INFO L87 Difference]: Start difference. First operand 165 states and 181 transitions. Second operand has 9 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:34:27,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:34:27,501 INFO L93 Difference]: Finished difference Result 203 states and 221 transitions. [2021-10-21 19:34:27,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-21 19:34:27,502 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2021-10-21 19:34:27,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:34:27,504 INFO L225 Difference]: With dead ends: 203 [2021-10-21 19:34:27,504 INFO L226 Difference]: Without dead ends: 203 [2021-10-21 19:34:27,504 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 166.2ms TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-10-21 19:34:27,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-10-21 19:34:27,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 165. [2021-10-21 19:34:27,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 105 states have (on average 1.6) internal successors, (168), 154 states have internal predecessors, (168), 8 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-21 19:34:27,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 180 transitions. [2021-10-21 19:34:27,509 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 180 transitions. Word has length 29 [2021-10-21 19:34:27,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:34:27,510 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 180 transitions. [2021-10-21 19:34:27,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:34:27,510 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 180 transitions. [2021-10-21 19:34:27,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-10-21 19:34:27,510 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:34:27,511 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:34:27,511 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-10-21 19:34:27,511 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting create_treeErr22REQUIRES_VIOLATION === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK, create_treeErr0REQUIRES_VIOLATION, create_treeErr1REQUIRES_VIOLATION (and 61 more)] === [2021-10-21 19:34:27,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:34:27,512 INFO L82 PathProgramCache]: Analyzing trace with hash -359646150, now seen corresponding path program 1 times [2021-10-21 19:34:27,512 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:34:27,512 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701606085] [2021-10-21 19:34:27,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:34:27,512 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:34:27,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:34:27,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:34:27,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:34:27,645 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:34:27,645 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:34:27,646 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701606085] [2021-10-21 19:34:27,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701606085] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:34:27,646 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:34:27,646 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-10-21 19:34:27,646 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119480468] [2021-10-21 19:34:27,647 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-21 19:34:27,647 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:34:27,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-21 19:34:27,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-10-21 19:34:27,648 INFO L87 Difference]: Start difference. First operand 165 states and 180 transitions. Second operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:34:28,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:34:28,357 INFO L93 Difference]: Finished difference Result 204 states and 220 transitions. [2021-10-21 19:34:28,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-21 19:34:28,358 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 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 32 [2021-10-21 19:34:28,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:34:28,359 INFO L225 Difference]: With dead ends: 204 [2021-10-21 19:34:28,359 INFO L226 Difference]: Without dead ends: 204 [2021-10-21 19:34:28,360 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 130.2ms TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-10-21 19:34:28,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-10-21 19:34:28,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 165. [2021-10-21 19:34:28,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 105 states have (on average 1.5904761904761904) internal successors, (167), 154 states have internal predecessors, (167), 8 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-21 19:34:28,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 179 transitions. [2021-10-21 19:34:28,365 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 179 transitions. Word has length 32 [2021-10-21 19:34:28,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:34:28,366 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 179 transitions. [2021-10-21 19:34:28,366 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:34:28,366 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 179 transitions. [2021-10-21 19:34:28,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-10-21 19:34:28,367 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:34:28,367 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:34:28,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-10-21 19:34:28,367 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting create_treeErr23REQUIRES_VIOLATION === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK, create_treeErr0REQUIRES_VIOLATION, create_treeErr1REQUIRES_VIOLATION (and 61 more)] === [2021-10-21 19:34:28,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:34:28,368 INFO L82 PathProgramCache]: Analyzing trace with hash -359646149, now seen corresponding path program 1 times [2021-10-21 19:34:28,368 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:34:28,368 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406313333] [2021-10-21 19:34:28,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:34:28,368 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:34:28,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:34:28,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:34:28,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:34:28,552 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:34:28,552 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:34:28,552 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406313333] [2021-10-21 19:34:28,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406313333] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:34:28,553 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:34:28,553 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-10-21 19:34:28,553 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25530659] [2021-10-21 19:34:28,553 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-21 19:34:28,553 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:34:28,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-21 19:34:28,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-10-21 19:34:28,554 INFO L87 Difference]: Start difference. First operand 165 states and 179 transitions. Second operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:34:29,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:34:29,169 INFO L93 Difference]: Finished difference Result 203 states and 219 transitions. [2021-10-21 19:34:29,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-21 19:34:29,170 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 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 32 [2021-10-21 19:34:29,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:34:29,172 INFO L225 Difference]: With dead ends: 203 [2021-10-21 19:34:29,172 INFO L226 Difference]: Without dead ends: 203 [2021-10-21 19:34:29,172 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 162.2ms TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-10-21 19:34:29,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-10-21 19:34:29,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 165. [2021-10-21 19:34:29,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 105 states have (on average 1.5809523809523809) internal successors, (166), 154 states have internal predecessors, (166), 8 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-21 19:34:29,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 178 transitions. [2021-10-21 19:34:29,178 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 178 transitions. Word has length 32 [2021-10-21 19:34:29,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:34:29,178 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 178 transitions. [2021-10-21 19:34:29,179 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:34:29,179 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 178 transitions. [2021-10-21 19:34:29,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-21 19:34:29,179 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:34:29,180 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:34:29,180 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-10-21 19:34:29,180 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting create_treeErr26REQUIRES_VIOLATION === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK, create_treeErr0REQUIRES_VIOLATION, create_treeErr1REQUIRES_VIOLATION (and 61 more)] === [2021-10-21 19:34:29,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:34:29,181 INFO L82 PathProgramCache]: Analyzing trace with hash 1725030331, now seen corresponding path program 1 times [2021-10-21 19:34:29,181 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:34:29,181 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936531117] [2021-10-21 19:34:29,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:34:29,181 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:34:29,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:34:29,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:34:29,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:34:29,358 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:34:29,359 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:34:29,359 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936531117] [2021-10-21 19:34:29,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936531117] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:34:29,359 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:34:29,359 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-21 19:34:29,360 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95572744] [2021-10-21 19:34:29,360 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-21 19:34:29,360 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:34:29,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-21 19:34:29,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-10-21 19:34:29,361 INFO L87 Difference]: Start difference. First operand 165 states and 178 transitions. Second operand has 11 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:34:29,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:34:29,918 INFO L93 Difference]: Finished difference Result 205 states and 219 transitions. [2021-10-21 19:34:29,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-21 19:34:29,918 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 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 35 [2021-10-21 19:34:29,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:34:29,919 INFO L225 Difference]: With dead ends: 205 [2021-10-21 19:34:29,920 INFO L226 Difference]: Without dead ends: 205 [2021-10-21 19:34:29,920 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 172.3ms TimeCoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2021-10-21 19:34:29,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-10-21 19:34:29,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 165. [2021-10-21 19:34:29,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 105 states have (on average 1.5714285714285714) internal successors, (165), 154 states have internal predecessors, (165), 8 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-21 19:34:29,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 177 transitions. [2021-10-21 19:34:29,926 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 177 transitions. Word has length 35 [2021-10-21 19:34:29,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:34:29,926 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 177 transitions. [2021-10-21 19:34:29,926 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:34:29,927 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 177 transitions. [2021-10-21 19:34:29,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-21 19:34:29,927 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:34:29,927 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:34:29,928 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-10-21 19:34:29,929 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting create_treeErr27REQUIRES_VIOLATION === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK, create_treeErr0REQUIRES_VIOLATION, create_treeErr1REQUIRES_VIOLATION (and 61 more)] === [2021-10-21 19:34:29,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:34:29,929 INFO L82 PathProgramCache]: Analyzing trace with hash 1725030332, now seen corresponding path program 1 times [2021-10-21 19:34:29,930 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:34:29,930 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889683573] [2021-10-21 19:34:29,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:34:29,930 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:34:29,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:34:30,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:34:30,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:34:30,143 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:34:30,144 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:34:30,144 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889683573] [2021-10-21 19:34:30,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889683573] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:34:30,144 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:34:30,144 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-21 19:34:30,144 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524472057] [2021-10-21 19:34:30,145 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-21 19:34:30,145 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:34:30,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-21 19:34:30,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-10-21 19:34:30,146 INFO L87 Difference]: Start difference. First operand 165 states and 177 transitions. Second operand has 11 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:34:30,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:34:30,730 INFO L93 Difference]: Finished difference Result 203 states and 217 transitions. [2021-10-21 19:34:30,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-21 19:34:30,731 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 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 35 [2021-10-21 19:34:30,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:34:30,732 INFO L225 Difference]: With dead ends: 203 [2021-10-21 19:34:30,732 INFO L226 Difference]: Without dead ends: 203 [2021-10-21 19:34:30,732 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 187.4ms TimeCoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-10-21 19:34:30,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-10-21 19:34:30,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 165. [2021-10-21 19:34:30,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 105 states have (on average 1.561904761904762) internal successors, (164), 154 states have internal predecessors, (164), 8 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-21 19:34:30,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 176 transitions. [2021-10-21 19:34:30,737 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 176 transitions. Word has length 35 [2021-10-21 19:34:30,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:34:30,738 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 176 transitions. [2021-10-21 19:34:30,738 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:34:30,738 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 176 transitions. [2021-10-21 19:34:30,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-10-21 19:34:30,739 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:34:30,739 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:34:30,739 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-10-21 19:34:30,740 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting create_treeErr10REQUIRES_VIOLATION === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK, create_treeErr0REQUIRES_VIOLATION, create_treeErr1REQUIRES_VIOLATION (and 61 more)] === [2021-10-21 19:34:30,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:34:30,740 INFO L82 PathProgramCache]: Analyzing trace with hash 11285986, now seen corresponding path program 1 times [2021-10-21 19:34:30,740 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:34:30,740 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983052611] [2021-10-21 19:34:30,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:34:30,741 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:34:30,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:34:31,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:34:31,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:34:31,091 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:34:31,092 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:34:31,092 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983052611] [2021-10-21 19:34:31,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983052611] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:34:31,092 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739269875] [2021-10-21 19:34:31,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:34:31,093 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:34:31,093 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e53cf558-2ee9-455a-bc13-fb95efe5aa9e/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:34:31,096 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e53cf558-2ee9-455a-bc13-fb95efe5aa9e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:34:31,097 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e53cf558-2ee9-455a-bc13-fb95efe5aa9e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-21 19:34:31,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:34:31,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 51 conjunts are in the unsatisfiable core [2021-10-21 19:34:31,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:34:31,297 INFO L354 Elim1Store]: treesize reduction 44, result has 20.0 percent of original size [2021-10-21 19:34:31,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 24 [2021-10-21 19:34:31,455 INFO L354 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2021-10-21 19:34:31,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 30 [2021-10-21 19:34:31,605 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 13 treesize of output 9 [2021-10-21 19:34:31,615 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 13 treesize of output 9 [2021-10-21 19:34:31,752 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-10-21 19:34:31,753 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 29 treesize of output 13 [2021-10-21 19:34:31,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:34:31,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-10-21 19:34:31,934 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-10-21 19:34:31,934 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 23 treesize of output 22 [2021-10-21 19:34:31,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:34:31,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-10-21 19:34:32,070 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-10-21 19:34:32,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 35 treesize of output 49 [2021-10-21 19:34:32,210 INFO L354 Elim1Store]: treesize reduction 56, result has 25.3 percent of original size [2021-10-21 19:34:32,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 54 [2021-10-21 19:34:32,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:34:32,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:34:32,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:34:32,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-10-21 19:34:32,646 INFO L354 Elim1Store]: treesize reduction 116, result has 18.3 percent of original size [2021-10-21 19:34:32,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 109 treesize of output 93 [2021-10-21 19:34:32,672 INFO L354 Elim1Store]: treesize reduction 88, result has 17.8 percent of original size [2021-10-21 19:34:32,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 101 treesize of output 99 [2021-10-21 19:34:33,109 INFO L354 Elim1Store]: treesize reduction 188, result has 14.9 percent of original size [2021-10-21 19:34:33,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 135 treesize of output 114 [2021-10-21 19:34:33,145 INFO L354 Elim1Store]: treesize reduction 156, result has 16.1 percent of original size [2021-10-21 19:34:33,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 127 treesize of output 128 [2021-10-21 19:34:37,654 INFO L354 Elim1Store]: treesize reduction 218, result has 15.8 percent of original size [2021-10-21 19:34:37,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 159 treesize of output 136 [2021-10-21 19:34:37,694 INFO L354 Elim1Store]: treesize reduction 190, result has 16.7 percent of original size [2021-10-21 19:34:37,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 134 treesize of output 118 [2021-10-21 19:34:38,002 INFO L354 Elim1Store]: treesize reduction 128, result has 16.9 percent of original size [2021-10-21 19:34:38,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 127 treesize of output 111 [2021-10-21 19:34:38,030 INFO L354 Elim1Store]: treesize reduction 96, result has 16.5 percent of original size [2021-10-21 19:34:38,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 119 treesize of output 117 [2021-10-21 19:34:38,051 INFO L354 Elim1Store]: treesize reduction 44, result has 27.9 percent of original size [2021-10-21 19:34:38,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 111 treesize of output 115 [2021-10-21 19:34:38,213 INFO L354 Elim1Store]: treesize reduction 78, result has 1.3 percent of original size [2021-10-21 19:34:38,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 97 treesize of output 60 [2021-10-21 19:34:38,221 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-10-21 19:34:38,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 57 treesize of output 31 [2021-10-21 19:34:38,237 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:34:38,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739269875] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:34:38,237 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:34:38,238 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 18] total 29 [2021-10-21 19:34:38,238 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466134385] [2021-10-21 19:34:38,238 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-10-21 19:34:38,239 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:34:38,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-10-21 19:34:38,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=679, Unknown=2, NotChecked=0, Total=812 [2021-10-21 19:34:38,240 INFO L87 Difference]: Start difference. First operand 165 states and 176 transitions. Second operand has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 28 states have internal predecessors, (69), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-21 19:34:59,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:34:59,012 INFO L93 Difference]: Finished difference Result 234 states and 248 transitions. [2021-10-21 19:34:59,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-10-21 19:34:59,012 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 28 states have internal predecessors, (69), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 40 [2021-10-21 19:34:59,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:34:59,014 INFO L225 Difference]: With dead ends: 234 [2021-10-21 19:34:59,015 INFO L226 Difference]: Without dead ends: 234 [2021-10-21 19:34:59,016 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 545 ImplicationChecksByTransitivity, 20064.6ms TimeCoverageRelationStatistics Valid=403, Invalid=2138, Unknown=9, NotChecked=0, Total=2550 [2021-10-21 19:34:59,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-10-21 19:34:59,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 191. [2021-10-21 19:34:59,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 131 states have (on average 1.4580152671755726) internal successors, (191), 180 states have internal predecessors, (191), 8 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-21 19:34:59,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 203 transitions. [2021-10-21 19:34:59,024 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 203 transitions. Word has length 40 [2021-10-21 19:34:59,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:34:59,024 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 203 transitions. [2021-10-21 19:34:59,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 28 states have internal predecessors, (69), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-21 19:34:59,025 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 203 transitions. [2021-10-21 19:34:59,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-10-21 19:34:59,026 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:34:59,026 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:34:59,062 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e53cf558-2ee9-455a-bc13-fb95efe5aa9e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-10-21 19:34:59,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e53cf558-2ee9-455a-bc13-fb95efe5aa9e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-10-21 19:34:59,240 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr0ENSURES_VIOLATIONMEMORY_LEAK === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK, create_treeErr0REQUIRES_VIOLATION, create_treeErr1REQUIRES_VIOLATION (and 61 more)] === [2021-10-21 19:34:59,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:34:59,240 INFO L82 PathProgramCache]: Analyzing trace with hash 1714624533, now seen corresponding path program 1 times [2021-10-21 19:34:59,240 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:34:59,241 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73949574] [2021-10-21 19:34:59,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:34:59,241 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:34:59,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:34:59,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:34:59,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:34:59,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-10-21 19:34:59,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:34:59,403 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-21 19:34:59,403 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:34:59,404 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73949574] [2021-10-21 19:34:59,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73949574] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:34:59,404 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:34:59,404 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-10-21 19:34:59,404 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800655415] [2021-10-21 19:34:59,406 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-21 19:34:59,407 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:34:59,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-21 19:34:59,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-10-21 19:34:59,408 INFO L87 Difference]: Start difference. First operand 191 states and 203 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 6 states have internal predecessors, (40), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-21 19:34:59,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:34:59,985 INFO L93 Difference]: Finished difference Result 230 states and 243 transitions. [2021-10-21 19:34:59,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-21 19:34:59,986 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 6 states have internal predecessors, (40), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 45 [2021-10-21 19:34:59,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:34:59,987 INFO L225 Difference]: With dead ends: 230 [2021-10-21 19:34:59,987 INFO L226 Difference]: Without dead ends: 230 [2021-10-21 19:34:59,987 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 77.1ms TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-10-21 19:34:59,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2021-10-21 19:34:59,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 191. [2021-10-21 19:34:59,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 131 states have (on average 1.4427480916030535) internal successors, (189), 180 states have internal predecessors, (189), 8 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-21 19:34:59,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 201 transitions. [2021-10-21 19:34:59,991 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 201 transitions. Word has length 45 [2021-10-21 19:34:59,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:34:59,991 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 201 transitions. [2021-10-21 19:34:59,991 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 6 states have internal predecessors, (40), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-21 19:34:59,992 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 201 transitions. [2021-10-21 19:34:59,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-10-21 19:34:59,992 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:34:59,992 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:34:59,993 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-10-21 19:34:59,993 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting failErr0ASSERT_VIOLATIONMEMORY_LEAK === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK, create_treeErr0REQUIRES_VIOLATION, create_treeErr1REQUIRES_VIOLATION (and 61 more)] === [2021-10-21 19:34:59,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:34:59,993 INFO L82 PathProgramCache]: Analyzing trace with hash 2037935847, now seen corresponding path program 1 times [2021-10-21 19:34:59,994 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:34:59,994 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951421414] [2021-10-21 19:34:59,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:34:59,994 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:35:00,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:35:00,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:35:00,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:35:00,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-10-21 19:35:00,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:35:00,134 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-21 19:35:00,135 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:35:00,135 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951421414] [2021-10-21 19:35:00,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951421414] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:35:00,136 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:35:00,136 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-10-21 19:35:00,136 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841808364] [2021-10-21 19:35:00,136 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-21 19:35:00,137 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:35:00,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-21 19:35:00,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-10-21 19:35:00,138 INFO L87 Difference]: Start difference. First operand 191 states and 201 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 7 states have internal predecessors, (42), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-21 19:35:00,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:35:00,813 INFO L93 Difference]: Finished difference Result 253 states and 268 transitions. [2021-10-21 19:35:00,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-21 19:35:00,813 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 7 states have internal predecessors, (42), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 49 [2021-10-21 19:35:00,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:35:00,815 INFO L225 Difference]: With dead ends: 253 [2021-10-21 19:35:00,815 INFO L226 Difference]: Without dead ends: 253 [2021-10-21 19:35:00,815 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 132.3ms TimeCoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-10-21 19:35:00,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2021-10-21 19:35:00,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 191. [2021-10-21 19:35:00,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 132 states have (on average 1.4318181818181819) internal successors, (189), 180 states have internal predecessors, (189), 7 states have call successors, (7), 6 states have call predecessors, (7), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-21 19:35:00,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 200 transitions. [2021-10-21 19:35:00,821 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 200 transitions. Word has length 49 [2021-10-21 19:35:00,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:35:00,822 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 200 transitions. [2021-10-21 19:35:00,822 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 7 states have internal predecessors, (42), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-21 19:35:00,822 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 200 transitions. [2021-10-21 19:35:00,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-10-21 19:35:00,823 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:35:00,823 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:35:00,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-10-21 19:35:00,824 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting inspectErr0REQUIRES_VIOLATION === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK, create_treeErr0REQUIRES_VIOLATION, create_treeErr1REQUIRES_VIOLATION (and 61 more)] === [2021-10-21 19:35:00,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:35:00,824 INFO L82 PathProgramCache]: Analyzing trace with hash -1248564646, now seen corresponding path program 1 times [2021-10-21 19:35:00,824 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:35:00,824 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664243427] [2021-10-21 19:35:00,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:35:00,825 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:35:00,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:35:00,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:35:00,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:35:00,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-10-21 19:35:00,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:35:00,973 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:35:00,973 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:35:00,973 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664243427] [2021-10-21 19:35:00,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664243427] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:35:00,974 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211175002] [2021-10-21 19:35:00,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:35:00,974 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:35:00,974 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e53cf558-2ee9-455a-bc13-fb95efe5aa9e/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:35:00,975 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e53cf558-2ee9-455a-bc13-fb95efe5aa9e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:35:00,998 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e53cf558-2ee9-455a-bc13-fb95efe5aa9e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-21 19:35:01,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:35:01,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-21 19:35:01,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:35:01,381 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:35:01,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [211175002] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:35:01,382 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:35:01,382 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 11 [2021-10-21 19:35:01,382 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530056069] [2021-10-21 19:35:01,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-21 19:35:01,383 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:35:01,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-21 19:35:01,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-10-21 19:35:01,384 INFO L87 Difference]: Start difference. First operand 191 states and 200 transitions. Second operand has 12 states, 11 states have (on average 5.636363636363637) internal successors, (62), 8 states have internal predecessors, (62), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-21 19:35:02,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:35:02,054 INFO L93 Difference]: Finished difference Result 229 states and 241 transitions. [2021-10-21 19:35:02,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-21 19:35:02,055 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 5.636363636363637) internal successors, (62), 8 states have internal predecessors, (62), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 50 [2021-10-21 19:35:02,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:35:02,056 INFO L225 Difference]: With dead ends: 229 [2021-10-21 19:35:02,057 INFO L226 Difference]: Without dead ends: 229 [2021-10-21 19:35:02,057 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 173.7ms TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-10-21 19:35:02,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2021-10-21 19:35:02,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 189. [2021-10-21 19:35:02,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 133 states have (on average 1.413533834586466) internal successors, (188), 178 states have internal predecessors, (188), 7 states have call successors, (7), 6 states have call predecessors, (7), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-21 19:35:02,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 199 transitions. [2021-10-21 19:35:02,066 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 199 transitions. Word has length 50 [2021-10-21 19:35:02,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:35:02,066 INFO L470 AbstractCegarLoop]: Abstraction has 189 states and 199 transitions. [2021-10-21 19:35:02,067 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 5.636363636363637) internal successors, (62), 8 states have internal predecessors, (62), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-21 19:35:02,067 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 199 transitions. [2021-10-21 19:35:02,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-10-21 19:35:02,068 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:35:02,068 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:35:02,099 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e53cf558-2ee9-455a-bc13-fb95efe5aa9e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-21 19:35:02,279 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e53cf558-2ee9-455a-bc13-fb95efe5aa9e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-10-21 19:35:02,280 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting inspectErr1REQUIRES_VIOLATION === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK, create_treeErr0REQUIRES_VIOLATION, create_treeErr1REQUIRES_VIOLATION (and 61 more)] === [2021-10-21 19:35:02,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:35:02,280 INFO L82 PathProgramCache]: Analyzing trace with hash -1248564645, now seen corresponding path program 1 times [2021-10-21 19:35:02,280 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:35:02,280 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085284550] [2021-10-21 19:35:02,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:35:02,281 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:35:02,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:35:02,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:35:02,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:35:02,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-10-21 19:35:02,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:35:02,556 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:35:02,557 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:35:02,557 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085284550] [2021-10-21 19:35:02,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085284550] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:35:02,557 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155598438] [2021-10-21 19:35:02,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:35:02,557 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:35:02,557 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e53cf558-2ee9-455a-bc13-fb95efe5aa9e/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:35:02,572 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e53cf558-2ee9-455a-bc13-fb95efe5aa9e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:35:02,574 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e53cf558-2ee9-455a-bc13-fb95efe5aa9e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-21 19:35:02,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:35:02,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 27 conjunts are in the unsatisfiable core [2021-10-21 19:35:02,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:35:03,424 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:35:03,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1155598438] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:35:03,424 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:35:03,425 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 19 [2021-10-21 19:35:03,425 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840608912] [2021-10-21 19:35:03,425 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-21 19:35:03,425 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:35:03,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-21 19:35:03,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2021-10-21 19:35:03,426 INFO L87 Difference]: Start difference. First operand 189 states and 199 transitions. Second operand has 20 states, 19 states have (on average 4.526315789473684) internal successors, (86), 14 states have internal predecessors, (86), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-10-21 19:35:04,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:35:04,500 INFO L93 Difference]: Finished difference Result 244 states and 259 transitions. [2021-10-21 19:35:04,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-21 19:35:04,500 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 4.526315789473684) internal successors, (86), 14 states have internal predecessors, (86), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 50 [2021-10-21 19:35:04,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:35:04,502 INFO L225 Difference]: With dead ends: 244 [2021-10-21 19:35:04,502 INFO L226 Difference]: Without dead ends: 244 [2021-10-21 19:35:04,503 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 411.8ms TimeCoverageRelationStatistics Valid=110, Invalid=646, Unknown=0, NotChecked=0, Total=756 [2021-10-21 19:35:04,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-10-21 19:35:04,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 191. [2021-10-21 19:35:04,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 135 states have (on average 1.4074074074074074) internal successors, (190), 180 states have internal predecessors, (190), 7 states have call successors, (7), 6 states have call predecessors, (7), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-21 19:35:04,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 201 transitions. [2021-10-21 19:35:04,508 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 201 transitions. Word has length 50 [2021-10-21 19:35:04,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:35:04,509 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 201 transitions. [2021-10-21 19:35:04,509 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 4.526315789473684) internal successors, (86), 14 states have internal predecessors, (86), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-10-21 19:35:04,509 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 201 transitions. [2021-10-21 19:35:04,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-10-21 19:35:04,510 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:35:04,510 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:35:04,532 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e53cf558-2ee9-455a-bc13-fb95efe5aa9e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-21 19:35:04,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e53cf558-2ee9-455a-bc13-fb95efe5aa9e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:35:04,724 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting create_treeErr10REQUIRES_VIOLATION === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK, create_treeErr0REQUIRES_VIOLATION, create_treeErr1REQUIRES_VIOLATION (and 61 more)] === [2021-10-21 19:35:04,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:35:04,724 INFO L82 PathProgramCache]: Analyzing trace with hash 1489839671, now seen corresponding path program 1 times [2021-10-21 19:35:04,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:35:04,725 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745757358] [2021-10-21 19:35:04,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:35:04,725 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:35:04,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:35:05,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:35:05,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:35:05,034 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:35:05,034 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:35:05,034 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745757358] [2021-10-21 19:35:05,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745757358] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:35:05,034 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538057791] [2021-10-21 19:35:05,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:35:05,035 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:35:05,035 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e53cf558-2ee9-455a-bc13-fb95efe5aa9e/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:35:05,036 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e53cf558-2ee9-455a-bc13-fb95efe5aa9e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:35:05,062 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e53cf558-2ee9-455a-bc13-fb95efe5aa9e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-21 19:35:05,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:35:05,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 52 conjunts are in the unsatisfiable core [2021-10-21 19:35:05,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:35:05,432 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 [2021-10-21 19:35:05,543 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-10-21 19:35:05,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-10-21 19:35:05,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-21 19:35:05,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-21 19:35:05,720 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-10-21 19:35:05,720 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 49 [2021-10-21 19:35:05,735 INFO L354 Elim1Store]: treesize reduction 43, result has 17.3 percent of original size [2021-10-21 19:35:05,736 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 67 treesize of output 60 [2021-10-21 19:35:05,853 INFO L354 Elim1Store]: treesize reduction 80, result has 17.5 percent of original size [2021-10-21 19:35:05,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 95 treesize of output 67 [2021-10-21 19:35:05,881 INFO L354 Elim1Store]: treesize reduction 104, result has 18.1 percent of original size [2021-10-21 19:35:05,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 76 treesize of output 63 [2021-10-21 19:35:06,064 INFO L354 Elim1Store]: treesize reduction 68, result has 20.0 percent of original size [2021-10-21 19:35:06,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 83 treesize of output 70 [2021-10-21 19:35:06,086 INFO L354 Elim1Store]: treesize reduction 92, result has 20.0 percent of original size [2021-10-21 19:35:06,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 79 treesize of output 81 [2021-10-21 19:35:06,199 INFO L354 Elim1Store]: treesize reduction 54, result has 36.5 percent of original size [2021-10-21 19:35:06,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 28 treesize of output 45 [2021-10-21 19:35:06,349 INFO L354 Elim1Store]: treesize reduction 138, result has 18.8 percent of original size [2021-10-21 19:35:06,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 116 treesize of output 121 [2021-10-21 19:35:06,384 INFO L354 Elim1Store]: treesize reduction 108, result has 19.4 percent of original size [2021-10-21 19:35:06,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 105 treesize of output 89 [2021-10-21 19:35:06,765 INFO L354 Elim1Store]: treesize reduction 180, result has 15.5 percent of original size [2021-10-21 19:35:06,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 144 treesize of output 110 [2021-10-21 19:35:06,808 INFO L354 Elim1Store]: treesize reduction 178, result has 15.2 percent of original size [2021-10-21 19:35:06,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 136 treesize of output 137 [2021-10-21 19:35:07,312 INFO L354 Elim1Store]: treesize reduction 268, result has 13.0 percent of original size [2021-10-21 19:35:07,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 170 treesize of output 131 [2021-10-21 19:35:07,373 INFO L354 Elim1Store]: treesize reduction 272, result has 13.7 percent of original size [2021-10-21 19:35:07,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 162 treesize of output 166 [2021-10-21 19:35:11,834 INFO L354 Elim1Store]: treesize reduction 306, result has 13.6 percent of original size [2021-10-21 19:35:11,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 194 treesize of output 153 [2021-10-21 19:35:11,889 INFO L354 Elim1Store]: treesize reduction 318, result has 13.8 percent of original size [2021-10-21 19:35:11,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 169 treesize of output 156 [2021-10-21 19:35:12,171 INFO L354 Elim1Store]: treesize reduction 196, result has 14.4 percent of original size [2021-10-21 19:35:12,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 148 treesize of output 114 [2021-10-21 19:35:12,208 INFO L354 Elim1Store]: treesize reduction 190, result has 14.4 percent of original size [2021-10-21 19:35:12,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 140 treesize of output 141 [2021-10-21 19:35:12,440 INFO L354 Elim1Store]: treesize reduction 132, result has 0.8 percent of original size [2021-10-21 19:35:12,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 155 treesize of output 89 [2021-10-21 19:35:12,453 INFO L354 Elim1Store]: treesize reduction 74, result has 1.3 percent of original size [2021-10-21 19:35:12,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 80 treesize of output 50 [2021-10-21 19:35:12,670 INFO L354 Elim1Store]: treesize reduction 66, result has 19.5 percent of original size [2021-10-21 19:35:12,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 42 [2021-10-21 19:35:14,788 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:35:14,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538057791] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:35:14,789 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:35:14,789 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19] total 34 [2021-10-21 19:35:14,789 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815979542] [2021-10-21 19:35:14,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-10-21 19:35:14,790 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:35:14,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-10-21 19:35:14,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=1009, Unknown=2, NotChecked=0, Total=1190 [2021-10-21 19:35:14,791 INFO L87 Difference]: Start difference. First operand 191 states and 201 transitions. Second operand has 35 states, 34 states have (on average 2.6176470588235294) internal successors, (89), 34 states have internal predecessors, (89), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:35:36,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:35:36,727 INFO L93 Difference]: Finished difference Result 276 states and 291 transitions. [2021-10-21 19:35:36,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-10-21 19:35:36,727 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.6176470588235294) internal successors, (89), 34 states have internal predecessors, (89), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2021-10-21 19:35:36,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:35:36,729 INFO L225 Difference]: With dead ends: 276 [2021-10-21 19:35:36,729 INFO L226 Difference]: Without dead ends: 276 [2021-10-21 19:35:36,730 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1069 ImplicationChecksByTransitivity, 22947.5ms TimeCoverageRelationStatistics Valid=784, Invalid=3367, Unknown=9, NotChecked=0, Total=4160 [2021-10-21 19:35:36,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2021-10-21 19:35:36,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 194. [2021-10-21 19:35:36,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 138 states have (on average 1.4130434782608696) internal successors, (195), 183 states have internal predecessors, (195), 7 states have call successors, (7), 6 states have call predecessors, (7), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-21 19:35:36,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 206 transitions. [2021-10-21 19:35:36,736 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 206 transitions. Word has length 50 [2021-10-21 19:35:36,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:35:36,737 INFO L470 AbstractCegarLoop]: Abstraction has 194 states and 206 transitions. [2021-10-21 19:35:36,737 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 2.6176470588235294) internal successors, (89), 34 states have internal predecessors, (89), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:35:36,737 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 206 transitions. [2021-10-21 19:35:36,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-10-21 19:35:36,738 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:35:36,738 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:35:36,767 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e53cf558-2ee9-455a-bc13-fb95efe5aa9e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-21 19:35:36,951 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e53cf558-2ee9-455a-bc13-fb95efe5aa9e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:35:36,952 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting create_treeErr11REQUIRES_VIOLATION === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK, create_treeErr0REQUIRES_VIOLATION, create_treeErr1REQUIRES_VIOLATION (and 61 more)] === [2021-10-21 19:35:36,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:35:36,953 INFO L82 PathProgramCache]: Analyzing trace with hash 1489839672, now seen corresponding path program 1 times [2021-10-21 19:35:36,953 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:35:36,953 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037250785] [2021-10-21 19:35:36,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:35:36,953 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:35:36,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:35:37,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:35:37,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:35:37,513 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:35:37,513 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:35:37,513 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037250785] [2021-10-21 19:35:37,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037250785] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:35:37,514 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027146345] [2021-10-21 19:35:37,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:35:37,514 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:35:37,514 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e53cf558-2ee9-455a-bc13-fb95efe5aa9e/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:35:37,519 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e53cf558-2ee9-455a-bc13-fb95efe5aa9e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:35:37,519 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e53cf558-2ee9-455a-bc13-fb95efe5aa9e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-21 19:35:37,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:35:37,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 57 conjunts are in the unsatisfiable core [2021-10-21 19:35:37,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:35:37,977 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 [2021-10-21 19:35:37,983 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 [2021-10-21 19:35:38,071 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-21 19:35:38,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-10-21 19:35:38,090 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-10-21 19:35:38,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-10-21 19:35:38,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-21 19:35:38,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-21 19:35:38,311 INFO L354 Elim1Store]: treesize reduction 47, result has 16.1 percent of original size [2021-10-21 19:35:38,311 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 104 treesize of output 70 [2021-10-21 19:35:38,322 INFO L354 Elim1Store]: treesize reduction 43, result has 17.3 percent of original size [2021-10-21 19:35:38,323 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 94 treesize of output 78 [2021-10-21 19:35:38,454 INFO L354 Elim1Store]: treesize reduction 112, result has 18.2 percent of original size [2021-10-21 19:35:38,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 122 treesize of output 88 [2021-10-21 19:35:38,478 INFO L354 Elim1Store]: treesize reduction 104, result has 18.1 percent of original size [2021-10-21 19:35:38,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 103 treesize of output 81 [2021-10-21 19:35:38,674 INFO L354 Elim1Store]: treesize reduction 100, result has 20.0 percent of original size [2021-10-21 19:35:38,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 110 treesize of output 91 [2021-10-21 19:35:38,693 INFO L354 Elim1Store]: treesize reduction 92, result has 20.0 percent of original size [2021-10-21 19:35:38,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 106 treesize of output 99 [2021-10-21 19:35:38,815 INFO L354 Elim1Store]: treesize reduction 54, result has 36.5 percent of original size [2021-10-21 19:35:38,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 28 treesize of output 45 [2021-10-21 19:35:38,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 28 [2021-10-21 19:35:38,983 INFO L354 Elim1Store]: treesize reduction 148, result has 18.7 percent of original size [2021-10-21 19:35:38,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 148 treesize of output 126 [2021-10-21 19:35:39,018 INFO L354 Elim1Store]: treesize reduction 138, result has 18.8 percent of original size [2021-10-21 19:35:39,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 153 treesize of output 149 [2021-10-21 19:35:39,502 INFO L354 Elim1Store]: treesize reduction 180, result has 15.5 percent of original size [2021-10-21 19:35:39,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 164 treesize of output 120 [2021-10-21 19:35:39,531 INFO L354 Elim1Store]: treesize reduction 178, result has 15.2 percent of original size [2021-10-21 19:35:39,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 156 treesize of output 157 [2021-10-21 19:35:40,003 INFO L354 Elim1Store]: treesize reduction 268, result has 13.0 percent of original size [2021-10-21 19:35:40,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 190 treesize of output 141 [2021-10-21 19:35:40,058 INFO L354 Elim1Store]: treesize reduction 272, result has 13.7 percent of original size [2021-10-21 19:35:40,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 182 treesize of output 186 [2021-10-21 19:35:44,557 INFO L354 Elim1Store]: treesize reduction 306, result has 13.6 percent of original size [2021-10-21 19:35:44,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 214 treesize of output 163 [2021-10-21 19:35:44,607 INFO L354 Elim1Store]: treesize reduction 318, result has 13.8 percent of original size [2021-10-21 19:35:44,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 189 treesize of output 176 [2021-10-21 19:35:44,925 INFO L354 Elim1Store]: treesize reduction 196, result has 14.4 percent of original size [2021-10-21 19:35:44,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 168 treesize of output 124 [2021-10-21 19:35:44,971 INFO L354 Elim1Store]: treesize reduction 190, result has 14.4 percent of original size [2021-10-21 19:35:44,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 160 treesize of output 161 [2021-10-21 19:35:45,221 INFO L354 Elim1Store]: treesize reduction 132, result has 0.8 percent of original size [2021-10-21 19:35:45,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 180 treesize of output 104 [2021-10-21 19:35:45,230 INFO L354 Elim1Store]: treesize reduction 74, result has 1.3 percent of original size [2021-10-21 19:35:45,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 101 treesize of output 65 [2021-10-21 19:35:45,488 INFO L354 Elim1Store]: treesize reduction 66, result has 19.5 percent of original size [2021-10-21 19:35:45,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 54 treesize of output 62 [2021-10-21 19:35:45,515 INFO L354 Elim1Store]: treesize reduction 36, result has 26.5 percent of original size [2021-10-21 19:35:45,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 53 treesize of output 57 [2021-10-21 19:35:45,665 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:35:45,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1027146345] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:35:45,666 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:35:45,666 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 34 [2021-10-21 19:35:45,666 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141112162] [2021-10-21 19:35:45,667 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-10-21 19:35:45,667 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:35:45,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-10-21 19:35:45,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1025, Unknown=2, NotChecked=0, Total=1190 [2021-10-21 19:35:45,668 INFO L87 Difference]: Start difference. First operand 194 states and 206 transitions. Second operand has 35 states, 34 states have (on average 2.4411764705882355) internal successors, (83), 34 states have internal predecessors, (83), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:35:56,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:35:56,128 INFO L93 Difference]: Finished difference Result 298 states and 314 transitions. [2021-10-21 19:35:56,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-10-21 19:35:56,129 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.4411764705882355) internal successors, (83), 34 states have internal predecessors, (83), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2021-10-21 19:35:56,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:35:56,131 INFO L225 Difference]: With dead ends: 298 [2021-10-21 19:35:56,131 INFO L226 Difference]: Without dead ends: 298 [2021-10-21 19:35:56,133 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1574 ImplicationChecksByTransitivity, 11600.9ms TimeCoverageRelationStatistics Valid=1099, Invalid=5061, Unknown=2, NotChecked=0, Total=6162 [2021-10-21 19:35:56,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2021-10-21 19:35:56,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 209. [2021-10-21 19:35:56,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 153 states have (on average 1.4052287581699345) internal successors, (215), 198 states have internal predecessors, (215), 7 states have call successors, (7), 6 states have call predecessors, (7), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-21 19:35:56,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 226 transitions. [2021-10-21 19:35:56,140 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 226 transitions. Word has length 50 [2021-10-21 19:35:56,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:35:56,140 INFO L470 AbstractCegarLoop]: Abstraction has 209 states and 226 transitions. [2021-10-21 19:35:56,140 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 2.4411764705882355) internal successors, (83), 34 states have internal predecessors, (83), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:35:56,141 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 226 transitions. [2021-10-21 19:35:56,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-10-21 19:35:56,141 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:35:56,142 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:35:56,180 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e53cf558-2ee9-455a-bc13-fb95efe5aa9e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-21 19:35:56,365 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e53cf558-2ee9-455a-bc13-fb95efe5aa9e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-10-21 19:35:56,365 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting inspectErr7REQUIRES_VIOLATION === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK, create_treeErr0REQUIRES_VIOLATION, create_treeErr1REQUIRES_VIOLATION (and 61 more)] === [2021-10-21 19:35:56,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:35:56,366 INFO L82 PathProgramCache]: Analyzing trace with hash -1574744257, now seen corresponding path program 1 times [2021-10-21 19:35:56,366 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:35:56,366 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486297302] [2021-10-21 19:35:56,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:35:56,366 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:35:56,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:35:56,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:35:56,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:35:56,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-10-21 19:35:56,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:35:56,687 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:35:56,687 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:35:56,687 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486297302] [2021-10-21 19:35:56,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486297302] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:35:56,688 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611554899] [2021-10-21 19:35:56,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:35:56,688 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:35:56,688 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e53cf558-2ee9-455a-bc13-fb95efe5aa9e/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:35:56,689 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e53cf558-2ee9-455a-bc13-fb95efe5aa9e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:35:56,705 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e53cf558-2ee9-455a-bc13-fb95efe5aa9e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-21 19:35:57,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:35:57,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 41 conjunts are in the unsatisfiable core [2021-10-21 19:35:57,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:35:57,338 INFO L354 Elim1Store]: treesize reduction 44, result has 20.0 percent of original size [2021-10-21 19:35:57,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 24 [2021-10-21 19:35:57,993 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-10-21 19:35:57,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 25 [2021-10-21 19:35:58,276 INFO L354 Elim1Store]: treesize reduction 8, result has 75.8 percent of original size [2021-10-21 19:35:58,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 58 treesize of output 72 [2021-10-21 19:35:58,573 INFO L354 Elim1Store]: treesize reduction 34, result has 8.1 percent of original size [2021-10-21 19:35:58,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 27 [2021-10-21 19:35:58,608 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:35:58,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [611554899] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:35:58,609 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:35:58,609 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 28 [2021-10-21 19:35:58,609 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483245049] [2021-10-21 19:35:58,609 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-10-21 19:35:58,609 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:35:58,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-10-21 19:35:58,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=693, Unknown=0, NotChecked=0, Total=756 [2021-10-21 19:35:58,610 INFO L87 Difference]: Start difference. First operand 209 states and 226 transitions. Second operand has 28 states, 28 states have (on average 3.2857142857142856) internal successors, (92), 22 states have internal predecessors, (92), 4 states have call successors, (8), 7 states have call predecessors, (8), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2021-10-21 19:36:01,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:36:01,748 INFO L93 Difference]: Finished difference Result 311 states and 339 transitions. [2021-10-21 19:36:01,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-10-21 19:36:01,749 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.2857142857142856) internal successors, (92), 22 states have internal predecessors, (92), 4 states have call successors, (8), 7 states have call predecessors, (8), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 52 [2021-10-21 19:36:01,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:36:01,751 INFO L225 Difference]: With dead ends: 311 [2021-10-21 19:36:01,751 INFO L226 Difference]: Without dead ends: 311 [2021-10-21 19:36:01,752 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 1819.0ms TimeCoverageRelationStatistics Valid=314, Invalid=2548, Unknown=0, NotChecked=0, Total=2862 [2021-10-21 19:36:01,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2021-10-21 19:36:01,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 250. [2021-10-21 19:36:01,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 191 states have (on average 1.4240837696335078) internal successors, (272), 237 states have internal predecessors, (272), 8 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2021-10-21 19:36:01,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 286 transitions. [2021-10-21 19:36:01,761 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 286 transitions. Word has length 52 [2021-10-21 19:36:01,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:36:01,762 INFO L470 AbstractCegarLoop]: Abstraction has 250 states and 286 transitions. [2021-10-21 19:36:01,762 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.2857142857142856) internal successors, (92), 22 states have internal predecessors, (92), 4 states have call successors, (8), 7 states have call predecessors, (8), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2021-10-21 19:36:01,762 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 286 transitions. [2021-10-21 19:36:01,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-10-21 19:36:01,763 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:36:01,763 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:36:01,812 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e53cf558-2ee9-455a-bc13-fb95efe5aa9e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-10-21 19:36:01,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e53cf558-2ee9-455a-bc13-fb95efe5aa9e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-10-21 19:36:01,984 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting inspectErr4REQUIRES_VIOLATION === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK, create_treeErr0REQUIRES_VIOLATION, create_treeErr1REQUIRES_VIOLATION (and 61 more)] === [2021-10-21 19:36:01,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:36:01,984 INFO L82 PathProgramCache]: Analyzing trace with hash -1572456405, now seen corresponding path program 1 times [2021-10-21 19:36:01,984 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:36:01,984 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031202098] [2021-10-21 19:36:01,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:36:01,985 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:36:02,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:36:02,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:36:02,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:36:02,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-10-21 19:36:02,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:36:02,483 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:36:02,483 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:36:02,483 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031202098] [2021-10-21 19:36:02,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031202098] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:36:02,483 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63101635] [2021-10-21 19:36:02,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:36:02,484 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:36:02,484 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e53cf558-2ee9-455a-bc13-fb95efe5aa9e/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:36:02,485 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e53cf558-2ee9-455a-bc13-fb95efe5aa9e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:36:02,505 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e53cf558-2ee9-455a-bc13-fb95efe5aa9e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-21 19:36:03,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:36:03,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 42 conjunts are in the unsatisfiable core [2021-10-21 19:36:03,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:36:03,212 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 [2021-10-21 19:36:03,380 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-21 19:36:03,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 11 treesize of output 11 [2021-10-21 19:36:03,424 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 [2021-10-21 19:36:03,561 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-21 19:36:03,561 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 22 [2021-10-21 19:36:03,779 INFO L354 Elim1Store]: treesize reduction 60, result has 20.0 percent of original size [2021-10-21 19:36:03,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 34 [2021-10-21 19:36:09,974 INFO L354 Elim1Store]: treesize reduction 74, result has 23.7 percent of original size [2021-10-21 19:36:09,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 62 treesize of output 53 [2021-10-21 19:36:10,102 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-10-21 19:36:10,102 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 29 [2021-10-21 19:36:10,666 INFO L354 Elim1Store]: treesize reduction 34, result has 8.1 percent of original size [2021-10-21 19:36:10,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 28 [2021-10-21 19:36:10,670 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:36:10,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [63101635] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:36:10,670 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:36:10,670 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20] total 37 [2021-10-21 19:36:10,671 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690179711] [2021-10-21 19:36:10,671 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-10-21 19:36:10,671 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:36:10,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-10-21 19:36:10,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1301, Unknown=2, NotChecked=0, Total=1406 [2021-10-21 19:36:10,672 INFO L87 Difference]: Start difference. First operand 250 states and 286 transitions. Second operand has 38 states, 37 states have (on average 2.4594594594594597) internal successors, (91), 32 states have internal predecessors, (91), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-10-21 19:36:33,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:36:33,447 INFO L93 Difference]: Finished difference Result 337 states and 383 transitions. [2021-10-21 19:36:33,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-10-21 19:36:33,447 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 2.4594594594594597) internal successors, (91), 32 states have internal predecessors, (91), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 53 [2021-10-21 19:36:33,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:36:33,450 INFO L225 Difference]: With dead ends: 337 [2021-10-21 19:36:33,450 INFO L226 Difference]: Without dead ends: 337 [2021-10-21 19:36:33,452 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 689 ImplicationChecksByTransitivity, 23004.5ms TimeCoverageRelationStatistics Valid=413, Invalid=3610, Unknown=9, NotChecked=0, Total=4032 [2021-10-21 19:36:33,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2021-10-21 19:36:33,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 284. [2021-10-21 19:36:33,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 222 states have (on average 1.427927927927928) internal successors, (317), 269 states have internal predecessors, (317), 9 states have call successors, (9), 8 states have call predecessors, (9), 8 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2021-10-21 19:36:33,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 334 transitions. [2021-10-21 19:36:33,491 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 334 transitions. Word has length 53 [2021-10-21 19:36:33,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:36:33,497 INFO L470 AbstractCegarLoop]: Abstraction has 284 states and 334 transitions. [2021-10-21 19:36:33,498 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 2.4594594594594597) internal successors, (91), 32 states have internal predecessors, (91), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-10-21 19:36:33,498 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 334 transitions. [2021-10-21 19:36:33,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-10-21 19:36:33,499 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:36:33,499 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:36:33,534 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e53cf558-2ee9-455a-bc13-fb95efe5aa9e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-10-21 19:36:33,715 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e53cf558-2ee9-455a-bc13-fb95efe5aa9e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-10-21 19:36:33,716 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting inspectErr5REQUIRES_VIOLATION === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK, create_treeErr0REQUIRES_VIOLATION, create_treeErr1REQUIRES_VIOLATION (and 61 more)] === [2021-10-21 19:36:33,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:36:33,716 INFO L82 PathProgramCache]: Analyzing trace with hash -1572456404, now seen corresponding path program 1 times [2021-10-21 19:36:33,716 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:36:33,717 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255826209] [2021-10-21 19:36:33,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:36:33,717 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:36:33,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:36:33,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:36:33,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:36:33,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-10-21 19:36:33,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:36:34,346 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:36:34,346 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:36:34,346 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255826209] [2021-10-21 19:36:34,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255826209] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:36:34,346 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923994382] [2021-10-21 19:36:34,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:36:34,347 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:36:34,347 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e53cf558-2ee9-455a-bc13-fb95efe5aa9e/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:36:34,348 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e53cf558-2ee9-455a-bc13-fb95efe5aa9e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:36:34,350 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e53cf558-2ee9-455a-bc13-fb95efe5aa9e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-21 19:36:34,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:36:34,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 50 conjunts are in the unsatisfiable core [2021-10-21 19:36:34,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:36:35,011 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 [2021-10-21 19:36:35,192 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 [2021-10-21 19:36:35,210 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-21 19:36:35,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 11 treesize of output 11 [2021-10-21 19:36:35,260 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 [2021-10-21 19:36:35,268 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 11 treesize of output 7 [2021-10-21 19:36:35,451 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-21 19:36:35,452 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 45 [2021-10-21 19:36:35,463 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-10-21 19:36:35,463 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 55 treesize of output 50 [2021-10-21 19:36:35,693 INFO L354 Elim1Store]: treesize reduction 60, result has 20.0 percent of original size [2021-10-21 19:36:35,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 89 treesize of output 66 [2021-10-21 19:36:35,715 INFO L354 Elim1Store]: treesize reduction 76, result has 20.0 percent of original size [2021-10-21 19:36:35,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 81 treesize of output 79 [2021-10-21 19:36:40,017 INFO L354 Elim1Store]: treesize reduction 74, result has 23.7 percent of original size [2021-10-21 19:36:40,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 113 treesize of output 88 [2021-10-21 19:36:40,075 INFO L354 Elim1Store]: treesize reduction 98, result has 21.6 percent of original size [2021-10-21 19:36:40,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 88 treesize of output 69 [2021-10-21 19:36:40,242 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-10-21 19:36:40,243 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 49 [2021-10-21 19:36:40,257 INFO L354 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2021-10-21 19:36:40,257 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 59 treesize of output 54 [2021-10-21 19:36:41,392 INFO L354 Elim1Store]: treesize reduction 42, result has 6.7 percent of original size [2021-10-21 19:36:41,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 71 treesize of output 56 [2021-10-21 19:36:41,406 INFO L354 Elim1Store]: treesize reduction 34, result has 8.1 percent of original size [2021-10-21 19:36:41,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 31 [2021-10-21 19:36:41,412 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:36:41,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [923994382] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:36:41,412 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:36:41,412 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-10-21 19:36:41,412 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452994442] [2021-10-21 19:36:41,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-10-21 19:36:41,413 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:36:41,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-10-21 19:36:41,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1229, Unknown=2, NotChecked=0, Total=1332 [2021-10-21 19:36:41,414 INFO L87 Difference]: Start difference. First operand 284 states and 334 transitions. Second operand has 37 states, 36 states have (on average 2.5277777777777777) internal successors, (91), 31 states have internal predecessors, (91), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-10-21 19:36:45,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:36:45,609 INFO L93 Difference]: Finished difference Result 339 states and 383 transitions. [2021-10-21 19:36:45,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-10-21 19:36:45,610 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.5277777777777777) internal successors, (91), 31 states have internal predecessors, (91), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 53 [2021-10-21 19:36:45,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:36:45,612 INFO L225 Difference]: With dead ends: 339 [2021-10-21 19:36:45,612 INFO L226 Difference]: Without dead ends: 339 [2021-10-21 19:36:45,614 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 564 ImplicationChecksByTransitivity, 6747.4ms TimeCoverageRelationStatistics Valid=348, Invalid=3072, Unknown=2, NotChecked=0, Total=3422 [2021-10-21 19:36:45,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2021-10-21 19:36:45,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 284. [2021-10-21 19:36:45,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 222 states have (on average 1.4189189189189189) internal successors, (315), 269 states have internal predecessors, (315), 9 states have call successors, (9), 8 states have call predecessors, (9), 8 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2021-10-21 19:36:45,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 332 transitions. [2021-10-21 19:36:45,624 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 332 transitions. Word has length 53 [2021-10-21 19:36:45,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:36:45,625 INFO L470 AbstractCegarLoop]: Abstraction has 284 states and 332 transitions. [2021-10-21 19:36:45,625 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 2.5277777777777777) internal successors, (91), 31 states have internal predecessors, (91), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-10-21 19:36:45,625 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 332 transitions. [2021-10-21 19:36:45,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-10-21 19:36:45,626 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:36:45,626 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:36:45,672 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e53cf558-2ee9-455a-bc13-fb95efe5aa9e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-10-21 19:36:45,843 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e53cf558-2ee9-455a-bc13-fb95efe5aa9e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-10-21 19:36:45,843 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting failErr0ASSERT_VIOLATIONMEMORY_LEAK === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK, create_treeErr0REQUIRES_VIOLATION, create_treeErr1REQUIRES_VIOLATION (and 61 more)] === [2021-10-21 19:36:45,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:36:45,844 INFO L82 PathProgramCache]: Analyzing trace with hash 159681268, now seen corresponding path program 1 times [2021-10-21 19:36:45,844 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:36:45,844 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60911173] [2021-10-21 19:36:45,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:36:45,844 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:36:45,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:36:46,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:36:46,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:36:46,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-10-21 19:36:46,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:36:46,682 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:36:46,682 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:36:46,682 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60911173] [2021-10-21 19:36:46,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60911173] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:36:46,683 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567103030] [2021-10-21 19:36:46,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:36:46,683 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:36:46,683 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e53cf558-2ee9-455a-bc13-fb95efe5aa9e/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:36:46,684 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e53cf558-2ee9-455a-bc13-fb95efe5aa9e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:36:46,705 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e53cf558-2ee9-455a-bc13-fb95efe5aa9e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-10-21 19:36:47,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:36:47,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 53 conjunts are in the unsatisfiable core [2021-10-21 19:36:47,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:36:47,521 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 [2021-10-21 19:36:47,746 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-21 19:36:47,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 11 treesize of output 11 [2021-10-21 19:36:47,794 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 [2021-10-21 19:36:47,951 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-21 19:36:47,952 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 22 [2021-10-21 19:36:48,152 INFO L354 Elim1Store]: treesize reduction 60, result has 20.0 percent of original size [2021-10-21 19:36:48,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 34 [2021-10-21 19:36:54,420 INFO L354 Elim1Store]: treesize reduction 94, result has 22.3 percent of original size [2021-10-21 19:36:54,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 125 treesize of output 104 [2021-10-21 19:36:54,424 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 96 treesize of output 88 [2021-10-21 19:36:54,445 INFO L354 Elim1Store]: treesize reduction 43, result has 14.0 percent of original size [2021-10-21 19:36:54,445 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 88 treesize of output 74 [2021-10-21 19:36:54,677 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-10-21 19:36:54,678 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 106 treesize of output 76 [2021-10-21 19:36:54,689 INFO L354 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2021-10-21 19:36:54,690 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 98 treesize of output 89 [2021-10-21 19:36:54,704 INFO L354 Elim1Store]: treesize reduction 53, result has 24.3 percent of original size [2021-10-21 19:36:54,704 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 90 treesize of output 62 [2021-10-21 19:36:55,783 INFO L354 Elim1Store]: treesize reduction 34, result has 8.1 percent of original size [2021-10-21 19:36:55,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 79 treesize of output 59 [2021-10-21 19:36:55,800 INFO L354 Elim1Store]: treesize reduction 34, result has 8.1 percent of original size [2021-10-21 19:36:55,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 32 [2021-10-21 19:36:55,875 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 19 treesize of output 7 [2021-10-21 19:36:55,886 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:36:55,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [567103030] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:36:55,886 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:36:55,886 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 41 [2021-10-21 19:36:55,887 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834877638] [2021-10-21 19:36:55,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-10-21 19:36:55,887 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:36:55,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-10-21 19:36:55,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1530, Unknown=2, NotChecked=0, Total=1640 [2021-10-21 19:36:55,889 INFO L87 Difference]: Start difference. First operand 284 states and 332 transitions. Second operand has 41 states, 41 states have (on average 2.292682926829268) internal successors, (94), 35 states have internal predecessors, (94), 4 states have call successors, (8), 6 states have call predecessors, (8), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-10-21 19:37:21,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:37:21,351 INFO L93 Difference]: Finished difference Result 338 states and 380 transitions. [2021-10-21 19:37:21,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-10-21 19:37:21,353 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.292682926829268) internal successors, (94), 35 states have internal predecessors, (94), 4 states have call successors, (8), 6 states have call predecessors, (8), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 56 [2021-10-21 19:37:21,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:37:21,355 INFO L225 Difference]: With dead ends: 338 [2021-10-21 19:37:21,355 INFO L226 Difference]: Without dead ends: 338 [2021-10-21 19:37:21,356 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 784 ImplicationChecksByTransitivity, 25472.6ms TimeCoverageRelationStatistics Valid=412, Invalid=4001, Unknown=9, NotChecked=0, Total=4422 [2021-10-21 19:37:21,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2021-10-21 19:37:21,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 284. [2021-10-21 19:37:21,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 222 states have (on average 1.40990990990991) internal successors, (313), 269 states have internal predecessors, (313), 9 states have call successors, (9), 8 states have call predecessors, (9), 8 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2021-10-21 19:37:21,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 330 transitions. [2021-10-21 19:37:21,366 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 330 transitions. Word has length 56 [2021-10-21 19:37:21,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:37:21,367 INFO L470 AbstractCegarLoop]: Abstraction has 284 states and 330 transitions. [2021-10-21 19:37:21,367 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.292682926829268) internal successors, (94), 35 states have internal predecessors, (94), 4 states have call successors, (8), 6 states have call predecessors, (8), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-10-21 19:37:21,367 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 330 transitions. [2021-10-21 19:37:21,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-10-21 19:37:21,368 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:37:21,368 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:37:21,417 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e53cf558-2ee9-455a-bc13-fb95efe5aa9e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-10-21 19:37:21,586 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e53cf558-2ee9-455a-bc13-fb95efe5aa9e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-10-21 19:37:21,587 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting failErr0ASSERT_VIOLATIONMEMORY_LEAK === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK, create_treeErr0REQUIRES_VIOLATION, create_treeErr1REQUIRES_VIOLATION (and 61 more)] === [2021-10-21 19:37:21,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:37:21,587 INFO L82 PathProgramCache]: Analyzing trace with hash -1789567773, now seen corresponding path program 1 times [2021-10-21 19:37:21,587 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:37:21,587 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050583928] [2021-10-21 19:37:21,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:37:21,587 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:37:21,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:37:21,625 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-21 19:37:21,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:37:21,712 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-21 19:37:21,713 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-21 19:37:21,714 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location failErr0ASSERT_VIOLATIONMEMORY_LEAK [2021-10-21 19:37:21,716 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr0ENSURES_VIOLATIONMEMORY_LEAK [2021-10-21 19:37:21,716 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location create_treeErr0REQUIRES_VIOLATION [2021-10-21 19:37:21,717 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location create_treeErr1REQUIRES_VIOLATION [2021-10-21 19:37:21,717 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location create_treeErr2REQUIRES_VIOLATION [2021-10-21 19:37:21,717 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location create_treeErr3REQUIRES_VIOLATION [2021-10-21 19:37:21,717 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location create_treeErr4REQUIRES_VIOLATION [2021-10-21 19:37:21,717 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location create_treeErr5REQUIRES_VIOLATION [2021-10-21 19:37:21,718 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location create_treeErr6REQUIRES_VIOLATION [2021-10-21 19:37:21,718 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location create_treeErr7REQUIRES_VIOLATION [2021-10-21 19:37:21,718 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location create_treeErr8REQUIRES_VIOLATION [2021-10-21 19:37:21,718 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location create_treeErr9REQUIRES_VIOLATION [2021-10-21 19:37:21,719 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location create_treeErr10REQUIRES_VIOLATION [2021-10-21 19:37:21,719 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location create_treeErr11REQUIRES_VIOLATION [2021-10-21 19:37:21,719 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location create_treeErr12REQUIRES_VIOLATION [2021-10-21 19:37:21,719 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location create_treeErr13REQUIRES_VIOLATION [2021-10-21 19:37:21,719 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location create_treeErr14REQUIRES_VIOLATION [2021-10-21 19:37:21,720 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location create_treeErr15REQUIRES_VIOLATION [2021-10-21 19:37:21,720 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location create_treeErr16REQUIRES_VIOLATION [2021-10-21 19:37:21,720 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location create_treeErr17REQUIRES_VIOLATION [2021-10-21 19:37:21,720 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location create_treeErr18REQUIRES_VIOLATION [2021-10-21 19:37:21,720 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location create_treeErr19REQUIRES_VIOLATION [2021-10-21 19:37:21,721 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location create_treeErr20REQUIRES_VIOLATION [2021-10-21 19:37:21,721 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location create_treeErr21REQUIRES_VIOLATION [2021-10-21 19:37:21,721 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location create_treeErr22REQUIRES_VIOLATION [2021-10-21 19:37:21,721 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location create_treeErr23REQUIRES_VIOLATION [2021-10-21 19:37:21,721 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location create_treeErr24REQUIRES_VIOLATION [2021-10-21 19:37:21,722 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location create_treeErr25REQUIRES_VIOLATION [2021-10-21 19:37:21,722 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location create_treeErr26REQUIRES_VIOLATION [2021-10-21 19:37:21,722 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location create_treeErr27REQUIRES_VIOLATION [2021-10-21 19:37:21,722 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location create_treeErr28REQUIRES_VIOLATION [2021-10-21 19:37:21,722 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location create_treeErr29REQUIRES_VIOLATION [2021-10-21 19:37:21,723 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location inspectErr0REQUIRES_VIOLATION [2021-10-21 19:37:21,723 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location inspectErr1REQUIRES_VIOLATION [2021-10-21 19:37:21,723 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location inspectErr2REQUIRES_VIOLATION [2021-10-21 19:37:21,723 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location inspectErr3REQUIRES_VIOLATION [2021-10-21 19:37:21,723 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location inspectErr4REQUIRES_VIOLATION [2021-10-21 19:37:21,724 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location inspectErr5REQUIRES_VIOLATION [2021-10-21 19:37:21,724 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location inspectErr6REQUIRES_VIOLATION [2021-10-21 19:37:21,724 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location inspectErr7REQUIRES_VIOLATION [2021-10-21 19:37:21,724 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location inspectErr8REQUIRES_VIOLATION [2021-10-21 19:37:21,724 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location inspectErr9REQUIRES_VIOLATION [2021-10-21 19:37:21,725 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location free_treeErr0REQUIRES_VIOLATION [2021-10-21 19:37:21,725 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location free_treeErr1REQUIRES_VIOLATION [2021-10-21 19:37:21,725 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location free_treeErr2REQUIRES_VIOLATION [2021-10-21 19:37:21,725 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location free_treeErr3REQUIRES_VIOLATION [2021-10-21 19:37:21,725 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location free_treeErr4REQUIRES_VIOLATION [2021-10-21 19:37:21,726 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location free_treeErr5REQUIRES_VIOLATION [2021-10-21 19:37:21,726 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location free_treeErr6REQUIRES_VIOLATION [2021-10-21 19:37:21,726 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location free_treeErr7REQUIRES_VIOLATION [2021-10-21 19:37:21,726 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location free_treeErr8ASSERT_VIOLATIONMEMORY_FREE [2021-10-21 19:37:21,727 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location free_treeErr9ASSERT_VIOLATIONMEMORY_FREE [2021-10-21 19:37:21,727 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location free_treeErr10ASSERT_VIOLATIONMEMORY_FREE [2021-10-21 19:37:21,727 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location free_treeErr11REQUIRES_VIOLATION [2021-10-21 19:37:21,727 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location free_treeErr12REQUIRES_VIOLATION [2021-10-21 19:37:21,727 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location free_treeErr13REQUIRES_VIOLATION [2021-10-21 19:37:21,728 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location free_treeErr14REQUIRES_VIOLATION [2021-10-21 19:37:21,728 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location free_treeErr15ASSERT_VIOLATIONMEMORY_FREE [2021-10-21 19:37:21,728 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location free_treeErr16ASSERT_VIOLATIONMEMORY_FREE [2021-10-21 19:37:21,728 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location free_treeErr17ASSERT_VIOLATIONMEMORY_FREE [2021-10-21 19:37:21,728 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location free_treeErr18REQUIRES_VIOLATION [2021-10-21 19:37:21,729 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location free_treeErr19REQUIRES_VIOLATION [2021-10-21 19:37:21,729 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location free_treeErr20ASSERT_VIOLATIONMEMORY_FREE [2021-10-21 19:37:21,729 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location free_treeErr21ASSERT_VIOLATIONMEMORY_FREE [2021-10-21 19:37:21,729 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location free_treeErr22ASSERT_VIOLATIONMEMORY_FREE [2021-10-21 19:37:21,730 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-10-21 19:37:21,738 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-21 19:37:21,780 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.10 07:37:21 BoogieIcfgContainer [2021-10-21 19:37:21,781 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-21 19:37:21,781 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-21 19:37:21,782 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-21 19:37:21,782 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-21 19:37:21,782 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 07:34:17" (3/4) ... [2021-10-21 19:37:21,785 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-21 19:37:21,833 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e53cf558-2ee9-455a-bc13-fb95efe5aa9e/bin/uautomizer-j4sWxH34Be/witness.graphml [2021-10-21 19:37:21,834 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-21 19:37:21,835 INFO L168 Benchmark]: Toolchain (without parser) took 185548.61 ms. Allocated memory was 111.1 MB in the beginning and 209.7 MB in the end (delta: 98.6 MB). Free memory was 70.0 MB in the beginning and 131.9 MB in the end (delta: -61.9 MB). Peak memory consumption was 36.7 MB. Max. memory is 16.1 GB. [2021-10-21 19:37:21,835 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 111.1 MB. Free memory was 87.4 MB in the beginning and 87.4 MB in the end (delta: 69.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-21 19:37:21,836 INFO L168 Benchmark]: CACSL2BoogieTranslator took 496.05 ms. Allocated memory is still 111.1 MB. Free memory was 69.8 MB in the beginning and 76.6 MB in the end (delta: -6.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-21 19:37:21,836 INFO L168 Benchmark]: Boogie Preprocessor took 66.78 ms. Allocated memory is still 111.1 MB. Free memory was 76.6 MB in the beginning and 73.7 MB in the end (delta: 2.9 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-21 19:37:21,836 INFO L168 Benchmark]: RCFGBuilder took 887.53 ms. Allocated memory is still 111.1 MB. Free memory was 73.4 MB in the beginning and 44.6 MB in the end (delta: 28.8 MB). Peak memory consumption was 29.4 MB. Max. memory is 16.1 GB. [2021-10-21 19:37:21,837 INFO L168 Benchmark]: TraceAbstraction took 184035.75 ms. Allocated memory was 111.1 MB in the beginning and 209.7 MB in the end (delta: 98.6 MB). Free memory was 44.3 MB in the beginning and 135.1 MB in the end (delta: -90.7 MB). Peak memory consumption was 101.8 MB. Max. memory is 16.1 GB. [2021-10-21 19:37:21,837 INFO L168 Benchmark]: Witness Printer took 52.56 ms. Allocated memory is still 209.7 MB. Free memory was 135.1 MB in the beginning and 131.9 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-21 19:37:21,839 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 111.1 MB. Free memory was 87.4 MB in the beginning and 87.4 MB in the end (delta: 69.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 496.05 ms. Allocated memory is still 111.1 MB. Free memory was 69.8 MB in the beginning and 76.6 MB in the end (delta: -6.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 66.78 ms. Allocated memory is still 111.1 MB. Free memory was 76.6 MB in the beginning and 73.7 MB in the end (delta: 2.9 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * RCFGBuilder took 887.53 ms. Allocated memory is still 111.1 MB. Free memory was 73.4 MB in the beginning and 44.6 MB in the end (delta: 28.8 MB). Peak memory consumption was 29.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 184035.75 ms. Allocated memory was 111.1 MB in the beginning and 209.7 MB in the end (delta: 98.6 MB). Free memory was 44.3 MB in the beginning and 135.1 MB in the end (delta: -90.7 MB). Peak memory consumption was 101.8 MB. Max. memory is 16.1 GB. * Witness Printer took 52.56 ms. Allocated memory is still 209.7 MB. Free memory was 135.1 MB in the beginning and 131.9 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 565]: not all allocated memory was freed not all allocated memory was freed We found a FailurePath: [L632] CALL, EXPR create_tree() [L585] struct node *nodelast = ((void *)0); [L586] struct node *node = ((void *)0); VAL [node={0:0}, nodelast={0:0}] [L587] COND TRUE __VERIFIER_nondet_int() [L588] node = malloc(sizeof *node) [L589] COND FALSE !(!node) VAL [node={-1:0}, nodelast={0:0}] [L591] node->left = ((void *)0) VAL [node={-1:0}, nodelast={0:0}] [L592] node->right = nodelast VAL [node={-1:0}, nodelast={0:0}] [L593] COND FALSE !(\read(*nodelast)) VAL [node={-1:0}, nodelast={0:0}] [L595] int value = __VERIFIER_nondet_int(); [L596] node->value = value VAL [node={-1:0}, nodelast={0:0}, value=0] [L597] nodelast = node VAL [node={-1:0}, nodelast={-1:0}, value=0] [L587] COND FALSE !(__VERIFIER_nondet_int()) [L599] COND TRUE node != ((void *)0) VAL [node={-1:0}, nodelast={-1:0}, value=0] [L600] node->parent = ((void *)0) VAL [node={-1:0}, nodelast={-1:0}, value=0] [L601] COND TRUE node != ((void *)0) [L602] node->left = malloc(sizeof *node) VAL [malloc(sizeof *node)={-2:0}, node={-1:0}, nodelast={-1:0}, value=0] [L603] COND FALSE !(!node) VAL [node={-1:0}, nodelast={-1:0}, value=0] [L605] EXPR node->left VAL [node={-1:0}, node->left={-2:0}, nodelast={-1:0}, value=0] [L605] node->left->left = ((void *)0) VAL [node={-1:0}, node->left={-2:0}, nodelast={-1:0}, value=0] [L606] EXPR node->left VAL [node={-1:0}, node->left={-2:0}, nodelast={-1:0}, value=0] [L606] node->left->right = ((void *)0) VAL [node={-1:0}, node->left={-2:0}, nodelast={-1:0}, value=0] [L607] EXPR node->left VAL [node={-1:0}, node->left={-2:0}, nodelast={-1:0}, value=0] [L607] node->left->value = 42 VAL [node={-1:0}, node->left={-2:0}, nodelast={-1:0}, value=0] [L608] EXPR node->left VAL [node={-1:0}, node->left={-2:0}, nodelast={-1:0}, value=0] [L608] node->left->parent = node VAL [node={-1:0}, node->left={-2:0}, nodelast={-1:0}, value=0] [L609] EXPR node->right VAL [node={-1:0}, node->right={0:0}, nodelast={-1:0}, value=0] [L609] node = node->right [L601] COND FALSE !(node != ((void *)0)) VAL [node={0:0}, nodelast={-1:0}, value=0] [L611] return nodelast; VAL [\result={-1:0}, node={0:0}, nodelast={-1:0}, value=0] [L632] RET, EXPR create_tree() VAL [create_tree()={-1:0}] [L632] struct node *data = create_tree(); [L633] COND FALSE !(!data) VAL [data={-1:0}] [L635] CALL inspect(data) VAL [node={-1:0}] [L575] COND FALSE !(!(node)) VAL [node={-1:0}, node={-1:0}] [L576] COND TRUE node != ((void *)0) VAL [node={-1:0}, node={-1:0}] [L577] node->left VAL [node={-1:0}, node={-1:0}, node->left={-2:0}] [L577] COND TRUE node->left [L578] EXPR node->left VAL [node={-1:0}, node={-1:0}, node->left={-2:0}] [L578] EXPR node->left->value VAL [node={-1:0}, node={-1:0}, node->left={-2:0}, node->left->value=42] [L578] COND FALSE !(!(node->left->value == 42)) [L579] EXPR node->value VAL [node={-1:0}, node={-1:0}, node->value=0] [L579] COND TRUE !(node->value) [L579] CALL fail() [L565] reach_error() - UnprovableResult [Line: 630]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: 591]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 591]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 592]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 592]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 594]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 594]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 596]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 596]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 600]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 600]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 602]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 602]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 605]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 605]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 605]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 605]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 606]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 606]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 606]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 606]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 607]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 607]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 607]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 607]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 608]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 608]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 608]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 608]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 609]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 609]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 577]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 577]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 578]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 578]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 578]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 578]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 579]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 579]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 580]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 580]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 616]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 616]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 618]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 618]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 621]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 621]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 622]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 622]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 622]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 622]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 622]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 623]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 623]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 624]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 624]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 624]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 624]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 624]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 626]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 626]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 628]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 628]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 628]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 10 procedures, 173 locations, 65 error locations. Started 1 CEGAR loops. OverallTime: 183875.0ms, OverallIterations: 29, TraceHistogramMax: 3, EmptinessCheckTime: 40.0ms, AutomataDifference: 120465.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 27.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 2484 SDtfs, 7178 SDslu, 5673 SDs, 0 SdLazy, 31377 SolverSat, 894 SolverUnsat, 13 SolverUnknown, 0 SolverNotchecked, 40238.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1140 GetRequests, 500 SyntacticMatches, 3 SemanticMatches, 637 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5945 ImplicationChecksByTransitivity, 114024.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=284occurred in iteration=26, InterpolantAutomatonStates: 407, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 270.2ms AutomataMinimizationTime, 28 MinimizatonAttempts, 1363 StatesRemovedByMinimization, 28 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 203.0ms SsaConstructionTime, 794.2ms SatisfiabilityAnalysisTime, 54992.4ms InterpolantComputationTime, 1501 NumberOfCodeBlocks, 1501 NumberOfCodeBlocksAsserted, 40 NumberOfCheckSat, 1403 ConstructedInterpolants, 169 QuantifiedInterpolants, 24583 SizeOfPredicates, 151 NumberOfNonLiveVariables, 2844 ConjunctsInSsa, 407 ConjunctsInUnsatCore, 39 InterpolantComputations, 17 PerfectInterpolantSequences, 81/152 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 RESULT: Ultimate proved your program to be incorrect! [2021-10-21 19:37:21,892 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e53cf558-2ee9-455a-bc13-fb95efe5aa9e/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...