./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-ext-properties/960521-1_1-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e943c265 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8854cb-0ee8-44f2-a947-515d84ea9bcc/bin/uautomizer-j4sWxH34Be/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8854cb-0ee8-44f2-a947-515d84ea9bcc/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_ef8854cb-0ee8-44f2-a947-515d84ea9bcc/bin/uautomizer-j4sWxH34Be/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8854cb-0ee8-44f2-a947-515d84ea9bcc/bin/uautomizer-j4sWxH34Be/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-ext-properties/960521-1_1-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8854cb-0ee8-44f2-a947-515d84ea9bcc/bin/uautomizer-j4sWxH34Be/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8854cb-0ee8-44f2-a947-515d84ea9bcc/bin/uautomizer-j4sWxH34Be --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 1bdc21b2f61b0d69220994ec3f8dc9d2db928c146bd54c19e0632aa07d01871a .............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(valid-deref) --- Real Ultimate output --- This is Ultimate 0.2.1-dev-e943c26 [2021-10-21 19:36:51,094 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-21 19:36:51,096 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-21 19:36:51,125 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-21 19:36:51,125 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-21 19:36:51,127 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-21 19:36:51,128 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-21 19:36:51,131 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-21 19:36:51,132 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-21 19:36:51,134 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-21 19:36:51,135 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-21 19:36:51,136 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-21 19:36:51,137 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-21 19:36:51,138 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-21 19:36:51,139 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-21 19:36:51,141 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-21 19:36:51,142 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-21 19:36:51,143 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-21 19:36:51,145 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-21 19:36:51,147 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-21 19:36:51,149 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-21 19:36:51,150 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-21 19:36:51,152 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-21 19:36:51,152 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-21 19:36:51,156 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-21 19:36:51,156 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-21 19:36:51,157 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-21 19:36:51,158 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-21 19:36:51,158 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-21 19:36:51,160 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-21 19:36:51,160 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-21 19:36:51,161 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-21 19:36:51,162 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-21 19:36:51,163 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-21 19:36:51,164 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-21 19:36:51,164 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-21 19:36:51,165 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-21 19:36:51,165 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-21 19:36:51,165 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-21 19:36:51,166 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-21 19:36:51,166 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-21 19:36:51,170 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8854cb-0ee8-44f2-a947-515d84ea9bcc/bin/uautomizer-j4sWxH34Be/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-10-21 19:36:51,207 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-21 19:36:51,207 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-21 19:36:51,208 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-21 19:36:51,208 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-21 19:36:51,215 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-21 19:36:51,216 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-21 19:36:51,216 INFO L138 SettingsManager]: * Use SBE=true [2021-10-21 19:36:51,216 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-21 19:36:51,216 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-21 19:36:51,217 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-21 19:36:51,218 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-21 19:36:51,218 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-21 19:36:51,218 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-21 19:36:51,218 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-21 19:36:51,219 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-21 19:36:51,219 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-21 19:36:51,219 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-21 19:36:51,219 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-21 19:36:51,219 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-21 19:36:51,220 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-21 19:36:51,220 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-21 19:36:51,220 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-21 19:36:51,220 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-21 19:36:51,220 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-21 19:36:51,221 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-21 19:36:51,221 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-21 19:36:51,221 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-21 19:36:51,221 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-21 19:36:51,222 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-21 19:36:51,223 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_ef8854cb-0ee8-44f2-a947-515d84ea9bcc/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8854cb-0ee8-44f2-a947-515d84ea9bcc/bin/uautomizer-j4sWxH34Be Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1bdc21b2f61b0d69220994ec3f8dc9d2db928c146bd54c19e0632aa07d01871a [2021-10-21 19:36:51,475 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-21 19:36:51,493 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-21 19:36:51,496 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-21 19:36:51,497 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-21 19:36:51,497 INFO L275 PluginConnector]: CDTParser initialized [2021-10-21 19:36:51,498 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8854cb-0ee8-44f2-a947-515d84ea9bcc/bin/uautomizer-j4sWxH34Be/../../sv-benchmarks/c/list-ext-properties/960521-1_1-1.i [2021-10-21 19:36:51,559 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8854cb-0ee8-44f2-a947-515d84ea9bcc/bin/uautomizer-j4sWxH34Be/data/8a808f104/5f291d4d96984a4eb42ca21b21782c62/FLAGe0ea5fe23 [2021-10-21 19:36:52,025 INFO L306 CDTParser]: Found 1 translation units. [2021-10-21 19:36:52,025 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8854cb-0ee8-44f2-a947-515d84ea9bcc/sv-benchmarks/c/list-ext-properties/960521-1_1-1.i [2021-10-21 19:36:52,039 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8854cb-0ee8-44f2-a947-515d84ea9bcc/bin/uautomizer-j4sWxH34Be/data/8a808f104/5f291d4d96984a4eb42ca21b21782c62/FLAGe0ea5fe23 [2021-10-21 19:36:52,367 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8854cb-0ee8-44f2-a947-515d84ea9bcc/bin/uautomizer-j4sWxH34Be/data/8a808f104/5f291d4d96984a4eb42ca21b21782c62 [2021-10-21 19:36:52,369 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-21 19:36:52,370 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-21 19:36:52,379 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-21 19:36:52,379 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-21 19:36:52,386 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-21 19:36:52,386 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 07:36:52" (1/1) ... [2021-10-21 19:36:52,388 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b521173 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:36:52, skipping insertion in model container [2021-10-21 19:36:52,388 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 07:36:52" (1/1) ... [2021-10-21 19:36:52,394 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-21 19:36:52,460 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-21 19:36:52,735 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-21 19:36:52,742 INFO L203 MainTranslator]: Completed pre-run [2021-10-21 19:36:52,777 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-21 19:36:52,806 INFO L208 MainTranslator]: Completed translation [2021-10-21 19:36:52,806 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:36:52 WrapperNode [2021-10-21 19:36:52,807 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-21 19:36:52,808 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-21 19:36:52,808 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-21 19:36:52,808 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-21 19:36:52,819 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:36:52" (1/1) ... [2021-10-21 19:36:52,819 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:36:52" (1/1) ... [2021-10-21 19:36:52,832 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:36:52" (1/1) ... [2021-10-21 19:36:52,832 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:36:52" (1/1) ... [2021-10-21 19:36:52,848 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:36:52" (1/1) ... [2021-10-21 19:36:52,852 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:36:52" (1/1) ... [2021-10-21 19:36:52,856 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:36:52" (1/1) ... [2021-10-21 19:36:52,862 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-21 19:36:52,862 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-21 19:36:52,863 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-21 19:36:52,863 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-21 19:36:52,864 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:36:52" (1/1) ... [2021-10-21 19:36:52,871 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-21 19:36:52,880 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8854cb-0ee8-44f2-a947-515d84ea9bcc/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:36:52,891 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8854cb-0ee8-44f2-a947-515d84ea9bcc/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-21 19:36:52,921 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8854cb-0ee8-44f2-a947-515d84ea9bcc/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-21 19:36:52,949 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-10-21 19:36:52,950 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-21 19:36:52,950 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-10-21 19:36:52,950 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-10-21 19:36:52,950 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-10-21 19:36:52,950 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2021-10-21 19:36:52,951 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2021-10-21 19:36:52,952 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2021-10-21 19:36:52,952 INFO L138 BoogieDeclarations]: Found implementation of procedure foo [2021-10-21 19:36:52,952 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-10-21 19:36:52,952 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-10-21 19:36:52,953 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-10-21 19:36:52,953 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-10-21 19:36:52,953 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-10-21 19:36:52,953 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-10-21 19:36:52,953 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-21 19:36:52,953 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-10-21 19:36:52,954 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-10-21 19:36:52,954 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-10-21 19:36:52,954 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-10-21 19:36:52,954 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-10-21 19:36:52,954 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-10-21 19:36:52,954 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-10-21 19:36:52,954 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-10-21 19:36:52,955 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-10-21 19:36:52,955 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-10-21 19:36:52,955 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-10-21 19:36:52,955 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-10-21 19:36:52,955 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-10-21 19:36:52,955 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-10-21 19:36:52,955 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-10-21 19:36:52,956 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-10-21 19:36:52,956 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-10-21 19:36:52,956 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-10-21 19:36:52,956 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2021-10-21 19:36:52,956 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2021-10-21 19:36:52,956 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2021-10-21 19:36:52,956 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-10-21 19:36:52,957 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-10-21 19:36:52,957 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-10-21 19:36:52,957 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-10-21 19:36:52,957 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-10-21 19:36:52,957 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-10-21 19:36:52,957 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-10-21 19:36:52,957 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-10-21 19:36:52,958 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-10-21 19:36:52,958 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-10-21 19:36:52,958 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-10-21 19:36:52,958 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-10-21 19:36:52,958 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-10-21 19:36:52,959 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-10-21 19:36:52,959 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-10-21 19:36:52,959 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-10-21 19:36:52,960 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-10-21 19:36:52,960 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-10-21 19:36:52,960 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-10-21 19:36:52,960 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-10-21 19:36:52,960 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-10-21 19:36:52,961 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-10-21 19:36:52,961 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-10-21 19:36:52,961 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-10-21 19:36:52,961 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-10-21 19:36:52,961 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-10-21 19:36:52,961 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-10-21 19:36:52,961 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-10-21 19:36:52,962 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-10-21 19:36:52,962 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-10-21 19:36:52,962 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-10-21 19:36:52,963 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-10-21 19:36:52,963 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-10-21 19:36:52,964 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-10-21 19:36:52,964 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-10-21 19:36:52,964 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-10-21 19:36:52,964 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-10-21 19:36:52,964 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-10-21 19:36:52,965 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-10-21 19:36:52,965 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-10-21 19:36:52,965 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-10-21 19:36:52,965 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-10-21 19:36:52,965 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-10-21 19:36:52,965 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-10-21 19:36:52,965 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-10-21 19:36:52,966 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-10-21 19:36:52,966 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-10-21 19:36:52,966 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-10-21 19:36:52,967 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-10-21 19:36:52,967 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-10-21 19:36:52,967 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-10-21 19:36:52,967 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-10-21 19:36:52,967 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-10-21 19:36:52,967 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-10-21 19:36:52,967 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-10-21 19:36:52,968 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-10-21 19:36:52,968 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-10-21 19:36:52,968 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-10-21 19:36:52,968 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-10-21 19:36:52,968 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-10-21 19:36:52,968 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-10-21 19:36:52,968 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-10-21 19:36:52,969 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-10-21 19:36:52,969 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-10-21 19:36:52,969 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-10-21 19:36:52,969 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-10-21 19:36:52,969 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-10-21 19:36:52,969 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-10-21 19:36:52,969 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-10-21 19:36:52,969 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-10-21 19:36:52,970 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-10-21 19:36:52,970 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-10-21 19:36:52,970 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-10-21 19:36:52,970 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-10-21 19:36:52,971 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-10-21 19:36:52,971 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-10-21 19:36:52,971 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-10-21 19:36:52,972 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-10-21 19:36:52,972 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-10-21 19:36:52,972 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-10-21 19:36:52,972 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-10-21 19:36:52,973 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-10-21 19:36:52,973 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-10-21 19:36:52,973 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-10-21 19:36:52,973 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-10-21 19:36:52,973 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-10-21 19:36:52,973 INFO L130 BoogieDeclarations]: Found specification of procedure foo [2021-10-21 19:36:52,973 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-21 19:36:52,974 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-10-21 19:36:52,974 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-21 19:36:52,974 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-21 19:36:52,975 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-21 19:36:52,976 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-10-21 19:36:52,978 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-21 19:36:52,978 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-21 19:36:53,531 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-21 19:36:53,532 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-10-21 19:36:53,534 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 07:36:53 BoogieIcfgContainer [2021-10-21 19:36:53,534 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-21 19:36:53,536 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-21 19:36:53,537 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-21 19:36:53,542 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-21 19:36:53,548 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.10 07:36:52" (1/3) ... [2021-10-21 19:36:53,549 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@108aa572 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 07:36:53, skipping insertion in model container [2021-10-21 19:36:53,550 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:36:52" (2/3) ... [2021-10-21 19:36:53,550 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@108aa572 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 07:36:53, skipping insertion in model container [2021-10-21 19:36:53,550 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 07:36:53" (3/3) ... [2021-10-21 19:36:53,552 INFO L111 eAbstractionObserver]: Analyzing ICFG 960521-1_1-1.i [2021-10-21 19:36:53,562 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-21 19:36:53,562 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 21 error locations. [2021-10-21 19:36:53,618 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-21 19:36:53,626 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 19:36:53,626 INFO L340 AbstractCegarLoop]: Starting to check reachability of 21 error locations. [2021-10-21 19:36:53,643 INFO L276 IsEmpty]: Start isEmpty. Operand has 62 states, 34 states have (on average 1.8235294117647058) internal successors, (62), 55 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-21 19:36:53,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-21 19:36:53,650 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:36:53,650 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:36:53,651 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 16 more)] === [2021-10-21 19:36:53,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:36:53,656 INFO L82 PathProgramCache]: Analyzing trace with hash -2038959101, now seen corresponding path program 1 times [2021-10-21 19:36:53,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:36:53,665 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593572990] [2021-10-21 19:36:53,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:36:53,666 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:36:53,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:36:53,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:36:53,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:36:53,869 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 19:36:53,870 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:36:53,870 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593572990] [2021-10-21 19:36:53,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593572990] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:36:53,871 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:36:53,871 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-21 19:36:53,873 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039151092] [2021-10-21 19:36:53,877 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-21 19:36:53,877 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:36:53,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-21 19:36:53,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 19:36:53,892 INFO L87 Difference]: Start difference. First operand has 62 states, 34 states have (on average 1.8235294117647058) internal successors, (62), 55 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:36:54,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:36:54,080 INFO L93 Difference]: Finished difference Result 62 states and 65 transitions. [2021-10-21 19:36:54,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-21 19:36:54,082 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, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 9 [2021-10-21 19:36:54,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:36:54,090 INFO L225 Difference]: With dead ends: 62 [2021-10-21 19:36:54,090 INFO L226 Difference]: Without dead ends: 59 [2021-10-21 19:36:54,091 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 29.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 19:36:54,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-10-21 19:36:54,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2021-10-21 19:36:54,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 33 states have (on average 1.7272727272727273) internal successors, (57), 53 states have internal predecessors, (57), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-21 19:36:54,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 62 transitions. [2021-10-21 19:36:54,137 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 62 transitions. Word has length 9 [2021-10-21 19:36:54,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:36:54,137 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 62 transitions. [2021-10-21 19:36:54,137 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, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:36:54,137 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 62 transitions. [2021-10-21 19:36:54,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-21 19:36:54,139 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:36:54,139 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:36:54,141 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-21 19:36:54,141 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 16 more)] === [2021-10-21 19:36:54,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:36:54,142 INFO L82 PathProgramCache]: Analyzing trace with hash 1216562945, now seen corresponding path program 1 times [2021-10-21 19:36:54,142 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:36:54,143 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209210112] [2021-10-21 19:36:54,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:36:54,143 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:36:54,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:36:54,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:36:54,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:36:54,359 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 19:36:54,360 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:36:54,360 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209210112] [2021-10-21 19:36:54,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209210112] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:36:54,360 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:36:54,361 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:36:54,361 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262280582] [2021-10-21 19:36:54,362 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-21 19:36:54,362 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:36:54,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-21 19:36:54,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:36:54,363 INFO L87 Difference]: Start difference. First operand 59 states and 62 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:36:54,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:36:54,599 INFO L93 Difference]: Finished difference Result 111 states and 117 transitions. [2021-10-21 19:36:54,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-21 19:36:54,599 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2021-10-21 19:36:54,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:36:54,606 INFO L225 Difference]: With dead ends: 111 [2021-10-21 19:36:54,607 INFO L226 Difference]: Without dead ends: 111 [2021-10-21 19:36:54,607 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 84.4ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-21 19:36:54,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-10-21 19:36:54,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 63. [2021-10-21 19:36:54,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 37 states have (on average 1.7027027027027026) internal successors, (63), 57 states have internal predecessors, (63), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-21 19:36:54,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 68 transitions. [2021-10-21 19:36:54,631 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 68 transitions. Word has length 10 [2021-10-21 19:36:54,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:36:54,631 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 68 transitions. [2021-10-21 19:36:54,632 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:36:54,632 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 68 transitions. [2021-10-21 19:36:54,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-21 19:36:54,633 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:36:54,633 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:36:54,633 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-21 19:36:54,634 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 16 more)] === [2021-10-21 19:36:54,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:36:54,634 INFO L82 PathProgramCache]: Analyzing trace with hash 1216562944, now seen corresponding path program 1 times [2021-10-21 19:36:54,635 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:36:54,635 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234847693] [2021-10-21 19:36:54,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:36:54,636 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:36:54,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:36:54,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:36:54,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:36:54,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:36:54,735 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:36:54,736 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234847693] [2021-10-21 19:36:54,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234847693] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:36:54,736 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:36:54,736 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-21 19:36:54,737 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839857636] [2021-10-21 19:36:54,737 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:36:54,737 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:36:54,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:36:54,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:36:54,739 INFO L87 Difference]: Start difference. First operand 63 states and 68 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, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:36:54,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:36:54,844 INFO L93 Difference]: Finished difference Result 62 states and 66 transitions. [2021-10-21 19:36:54,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:36:54,844 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2021-10-21 19:36:54,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:36:54,847 INFO L225 Difference]: With dead ends: 62 [2021-10-21 19:36:54,847 INFO L226 Difference]: Without dead ends: 62 [2021-10-21 19:36:54,847 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.3ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:36:54,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-10-21 19:36:54,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2021-10-21 19:36:54,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 37 states have (on average 1.6486486486486487) internal successors, (61), 56 states have internal predecessors, (61), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-21 19:36:54,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 66 transitions. [2021-10-21 19:36:54,858 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 66 transitions. Word has length 10 [2021-10-21 19:36:54,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:36:54,858 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 66 transitions. [2021-10-21 19:36:54,859 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:36:54,859 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 66 transitions. [2021-10-21 19:36:54,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-21 19:36:54,859 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:36:54,860 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:36:54,860 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-21 19:36:54,860 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 16 more)] === [2021-10-21 19:36:54,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:36:54,868 INFO L82 PathProgramCache]: Analyzing trace with hash 887456838, now seen corresponding path program 1 times [2021-10-21 19:36:54,869 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:36:54,869 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786143411] [2021-10-21 19:36:54,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:36:54,870 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:36:54,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:36:54,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:36:54,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:36:55,008 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:36:55,008 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:36:55,008 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786143411] [2021-10-21 19:36:55,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786143411] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:36:55,013 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218665589] [2021-10-21 19:36:55,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:36:55,014 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:36:55,014 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8854cb-0ee8-44f2-a947-515d84ea9bcc/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:36:55,019 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8854cb-0ee8-44f2-a947-515d84ea9bcc/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:36:55,038 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8854cb-0ee8-44f2-a947-515d84ea9bcc/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-21 19:36:55,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:36:55,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-21 19:36:55,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:36:55,287 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-10-21 19:36:55,288 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 1 case distinctions, treesize of input 17 treesize of output 18 [2021-10-21 19:36:55,330 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 19:36:55,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [218665589] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:36:55,331 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:36:55,331 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2021-10-21 19:36:55,331 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972725512] [2021-10-21 19:36:55,331 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-21 19:36:55,332 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:36:55,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-21 19:36:55,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-10-21 19:36:55,333 INFO L87 Difference]: Start difference. First operand 62 states and 66 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:36:55,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:36:55,417 INFO L93 Difference]: Finished difference Result 108 states and 114 transitions. [2021-10-21 19:36:55,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-21 19:36:55,418 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-10-21 19:36:55,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:36:55,419 INFO L225 Difference]: With dead ends: 108 [2021-10-21 19:36:55,420 INFO L226 Difference]: Without dead ends: 108 [2021-10-21 19:36:55,420 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 85.3ms TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-10-21 19:36:55,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-10-21 19:36:55,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 57. [2021-10-21 19:36:55,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 33 states have (on average 1.6666666666666667) internal successors, (55), 51 states have internal predecessors, (55), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-21 19:36:55,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 60 transitions. [2021-10-21 19:36:55,426 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 60 transitions. Word has length 12 [2021-10-21 19:36:55,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:36:55,426 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 60 transitions. [2021-10-21 19:36:55,426 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:36:55,427 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 60 transitions. [2021-10-21 19:36:55,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-21 19:36:55,427 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:36:55,427 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:36:55,467 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8854cb-0ee8-44f2-a947-515d84ea9bcc/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-21 19:36:55,653 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8854cb-0ee8-44f2-a947-515d84ea9bcc/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:36:55,654 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting fooErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 16 more)] === [2021-10-21 19:36:55,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:36:55,655 INFO L82 PathProgramCache]: Analyzing trace with hash -1178486182, now seen corresponding path program 1 times [2021-10-21 19:36:55,655 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:36:55,655 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243718820] [2021-10-21 19:36:55,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:36:55,655 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:36:55,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:36:55,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:36:55,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:36:55,768 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 19:36:55,768 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:36:55,768 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243718820] [2021-10-21 19:36:55,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243718820] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:36:55,769 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:36:55,769 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:36:55,769 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717469360] [2021-10-21 19:36:55,769 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-21 19:36:55,770 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:36:55,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-21 19:36:55,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:36:55,771 INFO L87 Difference]: Start difference. First operand 57 states and 60 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:36:55,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:36:55,886 INFO L93 Difference]: Finished difference Result 54 states and 57 transitions. [2021-10-21 19:36:55,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-21 19:36:55,888 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-10-21 19:36:55,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:36:55,891 INFO L225 Difference]: With dead ends: 54 [2021-10-21 19:36:55,891 INFO L226 Difference]: Without dead ends: 54 [2021-10-21 19:36:55,892 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 62.7ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-10-21 19:36:55,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-10-21 19:36:55,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2021-10-21 19:36:55,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 48 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-21 19:36:55,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 57 transitions. [2021-10-21 19:36:55,904 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 57 transitions. Word has length 15 [2021-10-21 19:36:55,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:36:55,905 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 57 transitions. [2021-10-21 19:36:55,905 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:36:55,905 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 57 transitions. [2021-10-21 19:36:55,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-21 19:36:55,906 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:36:55,906 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:36:55,906 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-21 19:36:55,906 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting fooErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 16 more)] === [2021-10-21 19:36:55,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:36:55,907 INFO L82 PathProgramCache]: Analyzing trace with hash -1178486181, now seen corresponding path program 1 times [2021-10-21 19:36:55,907 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:36:55,907 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819602758] [2021-10-21 19:36:55,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:36:55,907 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:36:55,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:36:56,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:36:56,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:36:56,053 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 19:36:56,054 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:36:56,054 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819602758] [2021-10-21 19:36:56,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819602758] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:36:56,054 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:36:56,054 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-21 19:36:56,057 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783242560] [2021-10-21 19:36:56,057 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-21 19:36:56,057 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:36:56,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-21 19:36:56,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-21 19:36:56,060 INFO L87 Difference]: Start difference. First operand 54 states and 57 transitions. Second operand has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:36:56,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:36:56,349 INFO L93 Difference]: Finished difference Result 98 states and 103 transitions. [2021-10-21 19:36:56,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-21 19:36:56,350 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-10-21 19:36:56,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:36:56,351 INFO L225 Difference]: With dead ends: 98 [2021-10-21 19:36:56,351 INFO L226 Difference]: Without dead ends: 98 [2021-10-21 19:36:56,351 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 119.3ms TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-10-21 19:36:56,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-10-21 19:36:56,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 74. [2021-10-21 19:36:56,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 51 states have (on average 1.4901960784313726) internal successors, (76), 66 states have internal predecessors, (76), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-21 19:36:56,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 83 transitions. [2021-10-21 19:36:56,356 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 83 transitions. Word has length 15 [2021-10-21 19:36:56,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:36:56,356 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 83 transitions. [2021-10-21 19:36:56,356 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:36:56,356 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 83 transitions. [2021-10-21 19:36:56,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-21 19:36:56,357 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:36:56,357 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:36:56,357 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-21 19:36:56,358 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting fooErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 16 more)] === [2021-10-21 19:36:56,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:36:56,358 INFO L82 PathProgramCache]: Analyzing trace with hash -939786186, now seen corresponding path program 1 times [2021-10-21 19:36:56,358 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:36:56,358 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709407457] [2021-10-21 19:36:56,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:36:56,359 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:36:56,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:36:56,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:36:56,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:36:56,493 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:36:56,493 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:36:56,493 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709407457] [2021-10-21 19:36:56,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709407457] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:36:56,494 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120162893] [2021-10-21 19:36:56,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:36:56,494 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:36:56,494 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8854cb-0ee8-44f2-a947-515d84ea9bcc/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:36:56,495 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8854cb-0ee8-44f2-a947-515d84ea9bcc/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:36:56,513 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8854cb-0ee8-44f2-a947-515d84ea9bcc/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-21 19:36:56,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:36:56,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-21 19:36:56,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:36:56,680 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-10-21 19:36:56,680 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 1 case distinctions, treesize of input 17 treesize of output 18 [2021-10-21 19:36:56,838 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 19:36:56,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2120162893] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:36:56,839 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:36:56,839 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2021-10-21 19:36:56,839 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093711193] [2021-10-21 19:36:56,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-21 19:36:56,840 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:36:56,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-21 19:36:56,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-10-21 19:36:56,841 INFO L87 Difference]: Start difference. First operand 74 states and 83 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 2 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 19:36:56,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:36:56,994 INFO L93 Difference]: Finished difference Result 104 states and 109 transitions. [2021-10-21 19:36:56,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-21 19:36:56,995 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-10-21 19:36:56,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:36:56,996 INFO L225 Difference]: With dead ends: 104 [2021-10-21 19:36:56,996 INFO L226 Difference]: Without dead ends: 104 [2021-10-21 19:36:56,996 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 142.7ms TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-10-21 19:36:56,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-10-21 19:36:56,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 71. [2021-10-21 19:36:56,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 50 states have (on average 1.4) internal successors, (70), 64 states have internal predecessors, (70), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-21 19:36:57,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 77 transitions. [2021-10-21 19:36:57,000 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 77 transitions. Word has length 17 [2021-10-21 19:36:57,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:36:57,000 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 77 transitions. [2021-10-21 19:36:57,001 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 2 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 19:36:57,001 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 77 transitions. [2021-10-21 19:36:57,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-21 19:36:57,001 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:36:57,002 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:36:57,044 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8854cb-0ee8-44f2-a947-515d84ea9bcc/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-21 19:36:57,213 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8854cb-0ee8-44f2-a947-515d84ea9bcc/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:36:57,214 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting fooErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 16 more)] === [2021-10-21 19:36:57,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:36:57,214 INFO L82 PathProgramCache]: Analyzing trace with hash -1219116994, now seen corresponding path program 1 times [2021-10-21 19:36:57,214 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:36:57,215 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183005366] [2021-10-21 19:36:57,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:36:57,215 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:36:57,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:36:57,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:36:57,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:36:57,294 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:36:57,294 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:36:57,294 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183005366] [2021-10-21 19:36:57,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183005366] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:36:57,295 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951823634] [2021-10-21 19:36:57,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:36:57,295 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:36:57,295 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8854cb-0ee8-44f2-a947-515d84ea9bcc/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:36:57,298 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8854cb-0ee8-44f2-a947-515d84ea9bcc/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:36:57,319 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8854cb-0ee8-44f2-a947-515d84ea9bcc/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-21 19:36:57,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:36:57,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-21 19:36:57,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:36:57,529 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 19:36:57,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1951823634] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:36:57,531 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:36:57,531 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2021-10-21 19:36:57,531 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624727338] [2021-10-21 19:36:57,532 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-21 19:36:57,532 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:36:57,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-21 19:36:57,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-10-21 19:36:57,536 INFO L87 Difference]: Start difference. First operand 71 states and 77 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 2 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 19:36:57,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:36:57,574 INFO L93 Difference]: Finished difference Result 97 states and 101 transitions. [2021-10-21 19:36:57,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-21 19:36:57,575 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 2 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 18 [2021-10-21 19:36:57,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:36:57,576 INFO L225 Difference]: With dead ends: 97 [2021-10-21 19:36:57,576 INFO L226 Difference]: Without dead ends: 97 [2021-10-21 19:36:57,577 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 55.1ms TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-10-21 19:36:57,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-10-21 19:36:57,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 70. [2021-10-21 19:36:57,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 49 states have (on average 1.3673469387755102) internal successors, (67), 63 states have internal predecessors, (67), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-21 19:36:57,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 74 transitions. [2021-10-21 19:36:57,586 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 74 transitions. Word has length 18 [2021-10-21 19:36:57,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:36:57,586 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 74 transitions. [2021-10-21 19:36:57,586 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 2 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 19:36:57,587 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 74 transitions. [2021-10-21 19:36:57,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-21 19:36:57,587 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:36:57,588 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:36:57,613 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8854cb-0ee8-44f2-a947-515d84ea9bcc/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-21 19:36:57,797 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8854cb-0ee8-44f2-a947-515d84ea9bcc/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-10-21 19:36:57,801 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting fooErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 16 more)] === [2021-10-21 19:36:57,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:36:57,801 INFO L82 PathProgramCache]: Analyzing trace with hash 1721559171, now seen corresponding path program 1 times [2021-10-21 19:36:57,801 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:36:57,801 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114256777] [2021-10-21 19:36:57,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:36:57,802 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:36:57,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:36:57,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:36:57,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:36:57,958 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:36:57,958 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:36:57,958 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114256777] [2021-10-21 19:36:57,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114256777] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:36:57,958 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497133415] [2021-10-21 19:36:57,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:36:57,959 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:36:57,959 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8854cb-0ee8-44f2-a947-515d84ea9bcc/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:36:57,960 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8854cb-0ee8-44f2-a947-515d84ea9bcc/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:36:57,969 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8854cb-0ee8-44f2-a947-515d84ea9bcc/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-21 19:36:58,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:36:58,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-21 19:36:58,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:36:58,175 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-10-21 19:36:58,176 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 1 case distinctions, treesize of input 17 treesize of output 18 [2021-10-21 19:36:58,383 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:36:58,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1497133415] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:36:58,384 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:36:58,384 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 12 [2021-10-21 19:36:58,384 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742193162] [2021-10-21 19:36:58,384 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-21 19:36:58,385 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:36:58,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-21 19:36:58,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-10-21 19:36:58,385 INFO L87 Difference]: Start difference. First operand 70 states and 74 transitions. Second operand has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:36:58,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:36:58,905 INFO L93 Difference]: Finished difference Result 112 states and 117 transitions. [2021-10-21 19:36:58,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-21 19:36:58,906 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2021-10-21 19:36:58,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:36:58,908 INFO L225 Difference]: With dead ends: 112 [2021-10-21 19:36:58,909 INFO L226 Difference]: Without dead ends: 112 [2021-10-21 19:36:58,909 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 294.7ms TimeCoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2021-10-21 19:36:58,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-10-21 19:36:58,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 73. [2021-10-21 19:36:58,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 52 states have (on average 1.3461538461538463) internal successors, (70), 66 states have internal predecessors, (70), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-21 19:36:58,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 77 transitions. [2021-10-21 19:36:58,913 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 77 transitions. Word has length 20 [2021-10-21 19:36:58,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:36:58,913 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 77 transitions. [2021-10-21 19:36:58,913 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:36:58,916 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 77 transitions. [2021-10-21 19:36:58,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-21 19:36:58,918 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:36:58,918 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:36:58,957 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8854cb-0ee8-44f2-a947-515d84ea9bcc/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-21 19:36:59,129 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8854cb-0ee8-44f2-a947-515d84ea9bcc/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:36:59,130 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr2REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 16 more)] === [2021-10-21 19:36:59,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:36:59,130 INFO L82 PathProgramCache]: Analyzing trace with hash -1762222077, now seen corresponding path program 1 times [2021-10-21 19:36:59,130 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:36:59,130 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687091911] [2021-10-21 19:36:59,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:36:59,131 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:36:59,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:36:59,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:36:59,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:36:59,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-21 19:36:59,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:36:59,206 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-21 19:36:59,206 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:36:59,206 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687091911] [2021-10-21 19:36:59,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687091911] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:36:59,207 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:36:59,207 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-21 19:36:59,207 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067426514] [2021-10-21 19:36:59,207 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-21 19:36:59,208 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:36:59,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-21 19:36:59,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-21 19:36:59,208 INFO L87 Difference]: Start difference. First operand 73 states and 77 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-21 19:36:59,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:36:59,399 INFO L93 Difference]: Finished difference Result 71 states and 75 transitions. [2021-10-21 19:36:59,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-21 19:36:59,399 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 22 [2021-10-21 19:36:59,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:36:59,400 INFO L225 Difference]: With dead ends: 71 [2021-10-21 19:36:59,400 INFO L226 Difference]: Without dead ends: 71 [2021-10-21 19:36:59,401 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 120.6ms TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-10-21 19:36:59,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-10-21 19:36:59,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2021-10-21 19:36:59,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 52 states have (on average 1.3076923076923077) internal successors, (68), 64 states have internal predecessors, (68), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-21 19:36:59,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 75 transitions. [2021-10-21 19:36:59,404 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 75 transitions. Word has length 22 [2021-10-21 19:36:59,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:36:59,405 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 75 transitions. [2021-10-21 19:36:59,405 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-21 19:36:59,405 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 75 transitions. [2021-10-21 19:36:59,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-21 19:36:59,406 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:36:59,406 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:36:59,406 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-10-21 19:36:59,407 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 16 more)] === [2021-10-21 19:36:59,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:36:59,407 INFO L82 PathProgramCache]: Analyzing trace with hash -1762222076, now seen corresponding path program 1 times [2021-10-21 19:36:59,407 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:36:59,407 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067095499] [2021-10-21 19:36:59,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:36:59,408 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:36:59,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:36:59,422 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-21 19:36:59,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:36:59,456 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-21 19:36:59,456 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-21 19:36:59,457 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location mainErr3REQUIRES_VIOLATION [2021-10-21 19:36:59,459 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr0REQUIRES_VIOLATION [2021-10-21 19:36:59,459 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr1REQUIRES_VIOLATION [2021-10-21 19:36:59,459 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr2REQUIRES_VIOLATION [2021-10-21 19:36:59,459 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr4ASSERT_VIOLATIONMEMORY_FREE [2021-10-21 19:36:59,460 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr5ASSERT_VIOLATIONMEMORY_FREE [2021-10-21 19:36:59,460 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr6ASSERT_VIOLATIONMEMORY_FREE [2021-10-21 19:36:59,460 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr7ASSERT_VIOLATIONMEMORY_FREE [2021-10-21 19:36:59,460 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr8ASSERT_VIOLATIONMEMORY_FREE [2021-10-21 19:36:59,460 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr9ASSERT_VIOLATIONMEMORY_FREE [2021-10-21 19:36:59,461 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr10ASSERT_VIOLATIONMEMORY_FREE [2021-10-21 19:36:59,461 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr11ASSERT_VIOLATIONMEMORY_FREE [2021-10-21 19:36:59,461 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr12ASSERT_VIOLATIONMEMORY_FREE [2021-10-21 19:36:59,461 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr13ASSERT_VIOLATIONMEMORY_FREE [2021-10-21 19:36:59,461 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr14ASSERT_VIOLATIONMEMORY_FREE [2021-10-21 19:36:59,462 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr15ASSERT_VIOLATIONMEMORY_FREE [2021-10-21 19:36:59,462 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr16ENSURES_VIOLATIONMEMORY_LEAK [2021-10-21 19:36:59,462 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location fooErr0REQUIRES_VIOLATION [2021-10-21 19:36:59,462 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location fooErr1REQUIRES_VIOLATION [2021-10-21 19:36:59,462 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location fooErr2REQUIRES_VIOLATION [2021-10-21 19:36:59,463 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location fooErr3REQUIRES_VIOLATION [2021-10-21 19:36:59,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-10-21 19:36:59,469 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-21 19:36:59,522 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.10 07:36:59 BoogieIcfgContainer [2021-10-21 19:36:59,522 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-21 19:36:59,523 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-21 19:36:59,523 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-21 19:36:59,523 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-21 19:36:59,524 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 07:36:53" (3/4) ... [2021-10-21 19:36:59,526 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-21 19:36:59,565 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8854cb-0ee8-44f2-a947-515d84ea9bcc/bin/uautomizer-j4sWxH34Be/witness.graphml [2021-10-21 19:36:59,565 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-21 19:36:59,566 INFO L168 Benchmark]: Toolchain (without parser) took 7194.99 ms. Allocated memory was 127.9 MB in the beginning and 155.2 MB in the end (delta: 27.3 MB). Free memory was 88.0 MB in the beginning and 124.5 MB in the end (delta: -36.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-21 19:36:59,566 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 127.9 MB. Free memory is still 106.1 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-21 19:36:59,567 INFO L168 Benchmark]: CACSL2BoogieTranslator took 428.07 ms. Allocated memory is still 127.9 MB. Free memory was 87.8 MB in the beginning and 96.8 MB in the end (delta: -9.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-21 19:36:59,567 INFO L168 Benchmark]: Boogie Preprocessor took 54.18 ms. Allocated memory is still 127.9 MB. Free memory was 96.8 MB in the beginning and 94.1 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-21 19:36:59,567 INFO L168 Benchmark]: RCFGBuilder took 672.07 ms. Allocated memory is still 127.9 MB. Free memory was 94.1 MB in the beginning and 73.2 MB in the end (delta: 21.0 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. [2021-10-21 19:36:59,568 INFO L168 Benchmark]: TraceAbstraction took 5985.92 ms. Allocated memory was 127.9 MB in the beginning and 155.2 MB in the end (delta: 27.3 MB). Free memory was 72.7 MB in the beginning and 126.6 MB in the end (delta: -53.9 MB). Peak memory consumption was 64.6 MB. Max. memory is 16.1 GB. [2021-10-21 19:36:59,568 INFO L168 Benchmark]: Witness Printer took 42.26 ms. Allocated memory is still 155.2 MB. Free memory was 126.6 MB in the beginning and 124.5 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-21 19:36:59,570 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 127.9 MB. Free memory is still 106.1 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 428.07 ms. Allocated memory is still 127.9 MB. Free memory was 87.8 MB in the beginning and 96.8 MB in the end (delta: -9.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 54.18 ms. Allocated memory is still 127.9 MB. Free memory was 96.8 MB in the beginning and 94.1 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 672.07 ms. Allocated memory is still 127.9 MB. Free memory was 94.1 MB in the beginning and 73.2 MB in the end (delta: 21.0 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. * TraceAbstraction took 5985.92 ms. Allocated memory was 127.9 MB in the beginning and 155.2 MB in the end (delta: 27.3 MB). Free memory was 72.7 MB in the beginning and 126.6 MB in the end (delta: -53.9 MB). Peak memory consumption was 64.6 MB. Max. memory is 16.1 GB. * Witness Printer took 42.26 ms. Allocated memory is still 155.2 MB. Free memory was 126.6 MB in the beginning and 124.5 MB in the end (delta: 2.1 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: 544]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L523] int *a, *b; [L524] int n; VAL [\old(a)=57, \old(a)=52, \old(b)=54, \old(b)=55, \old(n)=50, a={0:0}, b={0:0}, n=0] [L536] n = 1 VAL [\old(a)=0, \old(a)=0, \old(b)=0, \old(b)=0, \old(n)=0, a={0:0}, b={0:0}, n=1] [L537] COND FALSE !(__VERIFIER_nondet_int() && n < 30) [L540] a = malloc(n * sizeof(*a)) [L541] b = malloc(n * sizeof(*b)) [L542] EXPR b++ VAL [\old(a)=0, \old(a)=0, \old(b)=0, \old(b)=0, \old(n)=0, a={-2:0}, b={-1:4}, b++={-1:0}, n=1] [L542] *b++ = 0 VAL [\old(a)=0, \old(a)=0, \old(b)=0, \old(b)=0, \old(n)=0, a={-2:0}, b={-1:4}, b++={-1:0}, n=1] [L543] CALL foo() VAL [\old(a)=0, \old(a)=0, \old(b)=0, \old(b)=0, \old(n)=0, a={-2:0}, b={-1:4}, n=1] [L528] int i; [L529] i = 0 VAL [\old(a)=0, \old(a)=0, \old(b)=0, \old(b)=0, \old(n)=0, a={-2:0}, b={-1:4}, i=0, n=1] [L529] COND TRUE i < n VAL [\old(a)=0, \old(a)=0, \old(b)=0, \old(b)=0, \old(n)=0, a={-2:0}, b={-1:4}, i=0, n=1] [L530] a[i] = n VAL [\old(a)=0, \old(a)=0, \old(b)=0, \old(b)=0, \old(n)=0, a={-2:0}, b={-1:4}, i=0, n=1] [L529] i++ VAL [\old(a)=0, \old(a)=0, \old(b)=0, \old(b)=0, \old(n)=0, a={-2:0}, b={-1:4}, i=1, n=1] [L529] COND FALSE !(i < n) VAL [\old(a)=0, \old(a)=0, \old(b)=0, \old(b)=0, \old(n)=0, a={-2:0}, b={-1:4}, i=1, n=1] [L531] i = 0 VAL [\old(a)=0, \old(a)=0, \old(b)=0, \old(b)=0, \old(n)=0, a={-2:0}, b={-1:4}, i=0, n=1] [L531] COND FALSE !(i < n - 1) VAL [\old(a)=0, \old(a)=0, \old(b)=0, \old(b)=0, \old(n)=0, a={-2:0}, b={-1:4}, i=0, n=1] [L543] RET foo() VAL [\old(a)=0, \old(a)=0, \old(b)=0, \old(b)=0, \old(n)=0, a={-2:0}, b={-1:4}, n=1] [L544] b[-2] - UnprovableResult [Line: 542]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 542]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 544]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 545]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 545]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 545]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 545]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 545]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 545]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 547]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 547]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 547]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 547]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 547]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 547]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 534]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: 530]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 530]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 532]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 532]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 10 procedures, 80 locations, 21 error locations. Started 1 CEGAR loops. OverallTime: 5850.6ms, OverallIterations: 11, TraceHistogramMax: 2, EmptinessCheckTime: 20.4ms, AutomataDifference: 1990.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 12.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 558 SDtfs, 748 SDslu, 897 SDs, 0 SdLazy, 1277 SolverSat, 80 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1122.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 145 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 1020.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=74occurred in iteration=6, InterpolantAutomatonStates: 61, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 104.3ms AutomataMinimizationTime, 10 MinimizatonAttempts, 222 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 66.7ms SsaConstructionTime, 289.4ms SatisfiabilityAnalysisTime, 1782.3ms InterpolantComputationTime, 237 NumberOfCodeBlocks, 237 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 201 ConstructedInterpolants, 0 QuantifiedInterpolants, 1455 SizeOfPredicates, 8 NumberOfNonLiveVariables, 618 ConjunctsInSsa, 28 ConjunctsInUnsatCore, 14 InterpolantComputations, 9 PerfectInterpolantSequences, 10/21 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 19:36:59,620 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8854cb-0ee8-44f2-a947-515d84ea9bcc/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...