./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-ext-properties/test-0158_1-3.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_b711d6e1-b987-4745-8bd4-63b920ef3dcf/bin/uautomizer-j4sWxH34Be/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b711d6e1-b987-4745-8bd4-63b920ef3dcf/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_b711d6e1-b987-4745-8bd4-63b920ef3dcf/bin/uautomizer-j4sWxH34Be/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b711d6e1-b987-4745-8bd4-63b920ef3dcf/bin/uautomizer-j4sWxH34Be/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-ext-properties/test-0158_1-3.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b711d6e1-b987-4745-8bd4-63b920ef3dcf/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_b711d6e1-b987-4745-8bd4-63b920ef3dcf/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 da0196598caa8f7971f5c05318e98ec0e7e9ad277348cd08159b1fad4465fe6c ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(valid-free) --- Real Ultimate output --- This is Ultimate 0.2.1-dev-e943c26 [2021-10-21 20:05:42,173 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-21 20:05:42,176 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-21 20:05:42,229 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-21 20:05:42,229 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-21 20:05:42,234 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-21 20:05:42,236 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-21 20:05:42,240 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-21 20:05:42,242 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-21 20:05:42,248 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-21 20:05:42,249 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-21 20:05:42,251 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-21 20:05:42,252 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-21 20:05:42,255 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-21 20:05:42,257 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-21 20:05:42,261 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-21 20:05:42,265 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-21 20:05:42,266 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-21 20:05:42,270 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-21 20:05:42,278 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-21 20:05:42,280 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-21 20:05:42,282 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-21 20:05:42,285 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-21 20:05:42,286 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-21 20:05:42,295 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-21 20:05:42,296 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-21 20:05:42,296 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-21 20:05:42,298 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-21 20:05:42,299 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-21 20:05:42,300 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-21 20:05:42,301 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-21 20:05:42,302 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-21 20:05:42,304 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-21 20:05:42,305 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-21 20:05:42,307 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-21 20:05:42,307 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-21 20:05:42,308 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-21 20:05:42,308 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-21 20:05:42,309 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-21 20:05:42,310 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-21 20:05:42,310 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-21 20:05:42,312 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b711d6e1-b987-4745-8bd4-63b920ef3dcf/bin/uautomizer-j4sWxH34Be/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-10-21 20:05:42,335 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-21 20:05:42,336 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-21 20:05:42,336 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-21 20:05:42,336 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-21 20:05:42,337 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-21 20:05:42,338 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-21 20:05:42,338 INFO L138 SettingsManager]: * Use SBE=true [2021-10-21 20:05:42,338 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-21 20:05:42,338 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-21 20:05:42,338 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-21 20:05:42,339 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-21 20:05:42,339 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-21 20:05:42,339 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-21 20:05:42,339 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-21 20:05:42,339 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-21 20:05:42,340 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-21 20:05:42,340 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-21 20:05:42,340 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-21 20:05:42,340 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-21 20:05:42,340 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-21 20:05:42,341 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-21 20:05:42,341 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-21 20:05:42,341 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-21 20:05:42,341 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-21 20:05:42,342 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-21 20:05:42,342 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-21 20:05:42,342 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-21 20:05:42,342 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-21 20:05:42,342 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-21 20:05:42,343 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_b711d6e1-b987-4745-8bd4-63b920ef3dcf/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b711d6e1-b987-4745-8bd4-63b920ef3dcf/bin/uautomizer-j4sWxH34Be Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> da0196598caa8f7971f5c05318e98ec0e7e9ad277348cd08159b1fad4465fe6c [2021-10-21 20:05:42,591 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-21 20:05:42,616 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-21 20:05:42,619 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-21 20:05:42,621 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-21 20:05:42,622 INFO L275 PluginConnector]: CDTParser initialized [2021-10-21 20:05:42,623 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b711d6e1-b987-4745-8bd4-63b920ef3dcf/bin/uautomizer-j4sWxH34Be/../../sv-benchmarks/c/list-ext-properties/test-0158_1-3.i [2021-10-21 20:05:42,700 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b711d6e1-b987-4745-8bd4-63b920ef3dcf/bin/uautomizer-j4sWxH34Be/data/e0e9583b3/8db35005e1694eb3a9b03efc4f5af132/FLAG4c3c2b473 [2021-10-21 20:05:43,200 INFO L306 CDTParser]: Found 1 translation units. [2021-10-21 20:05:43,200 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b711d6e1-b987-4745-8bd4-63b920ef3dcf/sv-benchmarks/c/list-ext-properties/test-0158_1-3.i [2021-10-21 20:05:43,218 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b711d6e1-b987-4745-8bd4-63b920ef3dcf/bin/uautomizer-j4sWxH34Be/data/e0e9583b3/8db35005e1694eb3a9b03efc4f5af132/FLAG4c3c2b473 [2021-10-21 20:05:43,549 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b711d6e1-b987-4745-8bd4-63b920ef3dcf/bin/uautomizer-j4sWxH34Be/data/e0e9583b3/8db35005e1694eb3a9b03efc4f5af132 [2021-10-21 20:05:43,552 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-21 20:05:43,555 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-21 20:05:43,560 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-21 20:05:43,561 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-21 20:05:43,564 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-21 20:05:43,566 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 08:05:43" (1/1) ... [2021-10-21 20:05:43,569 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7cc5fdea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:05:43, skipping insertion in model container [2021-10-21 20:05:43,569 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 08:05:43" (1/1) ... [2021-10-21 20:05:43,576 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-21 20:05:43,647 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-21 20:05:43,945 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-21 20:05:43,953 INFO L203 MainTranslator]: Completed pre-run [2021-10-21 20:05:43,993 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-21 20:05:44,024 INFO L208 MainTranslator]: Completed translation [2021-10-21 20:05:44,024 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:05:44 WrapperNode [2021-10-21 20:05:44,025 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-21 20:05:44,026 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-21 20:05:44,026 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-21 20:05:44,026 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-21 20:05:44,037 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:05:44" (1/1) ... [2021-10-21 20:05:44,038 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:05:44" (1/1) ... [2021-10-21 20:05:44,051 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:05:44" (1/1) ... [2021-10-21 20:05:44,051 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:05:44" (1/1) ... [2021-10-21 20:05:44,065 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:05:44" (1/1) ... [2021-10-21 20:05:44,066 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:05:44" (1/1) ... [2021-10-21 20:05:44,070 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:05:44" (1/1) ... [2021-10-21 20:05:44,076 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-21 20:05:44,077 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-21 20:05:44,077 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-21 20:05:44,077 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-21 20:05:44,078 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:05:44" (1/1) ... [2021-10-21 20:05:44,086 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-21 20:05:44,105 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b711d6e1-b987-4745-8bd4-63b920ef3dcf/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:05:44,128 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b711d6e1-b987-4745-8bd4-63b920ef3dcf/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-21 20:05:44,153 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b711d6e1-b987-4745-8bd4-63b920ef3dcf/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-21 20:05:44,176 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-10-21 20:05:44,177 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-21 20:05:44,177 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-10-21 20:05:44,178 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-10-21 20:05:44,178 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-10-21 20:05:44,178 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2021-10-21 20:05:44,178 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2021-10-21 20:05:44,179 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2021-10-21 20:05:44,179 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-10-21 20:05:44,179 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-10-21 20:05:44,180 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-10-21 20:05:44,180 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-10-21 20:05:44,181 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-10-21 20:05:44,181 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-10-21 20:05:44,181 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-21 20:05:44,181 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-10-21 20:05:44,181 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-10-21 20:05:44,181 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-10-21 20:05:44,182 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-10-21 20:05:44,182 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-10-21 20:05:44,182 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-10-21 20:05:44,182 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-10-21 20:05:44,182 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-10-21 20:05:44,182 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-10-21 20:05:44,183 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-10-21 20:05:44,183 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-10-21 20:05:44,183 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-10-21 20:05:44,183 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-10-21 20:05:44,183 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-10-21 20:05:44,183 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-10-21 20:05:44,184 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-10-21 20:05:44,184 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-10-21 20:05:44,184 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-10-21 20:05:44,184 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2021-10-21 20:05:44,184 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2021-10-21 20:05:44,184 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2021-10-21 20:05:44,185 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-10-21 20:05:44,185 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-10-21 20:05:44,185 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-10-21 20:05:44,185 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-10-21 20:05:44,185 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-10-21 20:05:44,185 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-10-21 20:05:44,186 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-10-21 20:05:44,186 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-10-21 20:05:44,186 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-10-21 20:05:44,186 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-10-21 20:05:44,186 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-10-21 20:05:44,186 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-10-21 20:05:44,187 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-10-21 20:05:44,187 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-10-21 20:05:44,187 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-10-21 20:05:44,188 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-10-21 20:05:44,188 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-10-21 20:05:44,189 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-10-21 20:05:44,189 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-10-21 20:05:44,189 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-10-21 20:05:44,189 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-10-21 20:05:44,189 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-10-21 20:05:44,190 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-10-21 20:05:44,190 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-10-21 20:05:44,190 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-10-21 20:05:44,190 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-10-21 20:05:44,190 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-10-21 20:05:44,190 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-10-21 20:05:44,190 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-10-21 20:05:44,191 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-10-21 20:05:44,191 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-10-21 20:05:44,191 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-10-21 20:05:44,193 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-10-21 20:05:44,193 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-10-21 20:05:44,194 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-10-21 20:05:44,194 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-10-21 20:05:44,194 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-10-21 20:05:44,194 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-10-21 20:05:44,194 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-10-21 20:05:44,195 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-10-21 20:05:44,195 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-10-21 20:05:44,195 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-10-21 20:05:44,195 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-10-21 20:05:44,195 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-10-21 20:05:44,195 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-10-21 20:05:44,195 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-10-21 20:05:44,196 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-10-21 20:05:44,197 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-10-21 20:05:44,197 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-10-21 20:05:44,197 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-10-21 20:05:44,197 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-10-21 20:05:44,197 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-10-21 20:05:44,197 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-10-21 20:05:44,198 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-10-21 20:05:44,198 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-10-21 20:05:44,198 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-10-21 20:05:44,198 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-10-21 20:05:44,198 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-10-21 20:05:44,198 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-10-21 20:05:44,199 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-10-21 20:05:44,199 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-10-21 20:05:44,199 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-10-21 20:05:44,199 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-10-21 20:05:44,199 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-10-21 20:05:44,199 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-10-21 20:05:44,200 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-10-21 20:05:44,200 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-10-21 20:05:44,200 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-10-21 20:05:44,200 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-10-21 20:05:44,200 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-10-21 20:05:44,200 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-10-21 20:05:44,201 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-10-21 20:05:44,201 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-10-21 20:05:44,201 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-10-21 20:05:44,201 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-10-21 20:05:44,201 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-10-21 20:05:44,202 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-10-21 20:05:44,202 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-10-21 20:05:44,203 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-10-21 20:05:44,203 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-10-21 20:05:44,203 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-10-21 20:05:44,203 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-10-21 20:05:44,203 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-10-21 20:05:44,203 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-10-21 20:05:44,204 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-10-21 20:05:44,204 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-10-21 20:05:44,204 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-10-21 20:05:44,204 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-21 20:05:44,204 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-21 20:05:44,205 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-21 20:05:44,205 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-21 20:05:44,205 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-21 20:05:44,206 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-21 20:05:44,207 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-10-21 20:05:44,209 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-21 20:05:44,210 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-21 20:05:44,637 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-21 20:05:44,638 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-10-21 20:05:44,639 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 08:05:44 BoogieIcfgContainer [2021-10-21 20:05:44,640 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-21 20:05:44,641 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-21 20:05:44,641 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-21 20:05:44,648 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-21 20:05:44,649 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.10 08:05:43" (1/3) ... [2021-10-21 20:05:44,653 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@297dcdc8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 08:05:44, skipping insertion in model container [2021-10-21 20:05:44,653 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:05:44" (2/3) ... [2021-10-21 20:05:44,654 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@297dcdc8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 08:05:44, skipping insertion in model container [2021-10-21 20:05:44,654 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 08:05:44" (3/3) ... [2021-10-21 20:05:44,655 INFO L111 eAbstractionObserver]: Analyzing ICFG test-0158_1-3.i [2021-10-21 20:05:44,676 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-21 20:05:44,676 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 21 error locations. [2021-10-21 20:05:44,719 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-21 20:05:44,725 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-21 20:05:44,725 INFO L340 AbstractCegarLoop]: Starting to check reachability of 21 error locations. [2021-10-21 20:05:44,741 INFO L276 IsEmpty]: Start isEmpty. Operand has 48 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 43 states have internal predecessors, (45), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-21 20:05:44,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-21 20:05:44,749 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:05:44,750 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:05:44,750 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 16 more)] === [2021-10-21 20:05:44,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:05:44,756 INFO L82 PathProgramCache]: Analyzing trace with hash 1605920523, now seen corresponding path program 1 times [2021-10-21 20:05:44,765 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:05:44,765 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845468667] [2021-10-21 20:05:44,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:05:44,766 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:05:44,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:05:45,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:05:45,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:05:45,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:05:45,051 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:05:45,051 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845468667] [2021-10-21 20:05:45,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845468667] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:05:45,052 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:05:45,053 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-21 20:05:45,054 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571705692] [2021-10-21 20:05:45,060 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 20:05:45,075 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:05:45,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 20:05:45,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 20:05:45,095 INFO L87 Difference]: Start difference. First operand has 48 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 43 states have internal predecessors, (45), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:05:45,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:05:45,267 INFO L93 Difference]: Finished difference Result 41 states and 42 transitions. [2021-10-21 20:05:45,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 20:05:45,269 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 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 7 [2021-10-21 20:05:45,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:05:45,277 INFO L225 Difference]: With dead ends: 41 [2021-10-21 20:05:45,277 INFO L226 Difference]: Without dead ends: 38 [2021-10-21 20:05:45,280 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.8ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 20:05:45,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-10-21 20:05:45,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-10-21 20:05:45,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 34 states have internal predecessors, (36), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:05:45,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2021-10-21 20:05:45,324 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 7 [2021-10-21 20:05:45,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:05:45,324 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2021-10-21 20:05:45,325 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:05:45,326 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2021-10-21 20:05:45,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-21 20:05:45,326 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:05:45,326 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:05:45,327 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-21 20:05:45,327 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 16 more)] === [2021-10-21 20:05:45,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:05:45,329 INFO L82 PathProgramCache]: Analyzing trace with hash 1605920524, now seen corresponding path program 1 times [2021-10-21 20:05:45,329 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:05:45,329 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875400911] [2021-10-21 20:05:45,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:05:45,330 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:05:45,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:05:45,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:05:45,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:05:45,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:05:45,519 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:05:45,519 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875400911] [2021-10-21 20:05:45,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875400911] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:05:45,520 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:05:45,520 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-21 20:05:45,520 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726875945] [2021-10-21 20:05:45,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 20:05:45,522 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:05:45,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 20:05:45,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 20:05:45,537 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:05:45,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:05:45,623 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2021-10-21 20:05:45,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 20:05:45,624 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 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 7 [2021-10-21 20:05:45,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:05:45,628 INFO L225 Difference]: With dead ends: 31 [2021-10-21 20:05:45,628 INFO L226 Difference]: Without dead ends: 31 [2021-10-21 20:05:45,629 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.9ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 20:05:45,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-10-21 20:05:45,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-10-21 20:05:45,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 21 states have (on average 1.380952380952381) internal successors, (29), 27 states have internal predecessors, (29), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:05:45,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2021-10-21 20:05:45,634 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 7 [2021-10-21 20:05:45,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:05:45,634 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2021-10-21 20:05:45,634 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:05:45,634 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2021-10-21 20:05:45,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-21 20:05:45,635 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:05:45,635 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:05:45,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-21 20:05:45,636 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr14ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 16 more)] === [2021-10-21 20:05:45,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:05:45,636 INFO L82 PathProgramCache]: Analyzing trace with hash -202342310, now seen corresponding path program 1 times [2021-10-21 20:05:45,637 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:05:45,637 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224212772] [2021-10-21 20:05:45,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:05:45,637 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:05:45,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:05:45,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:05:45,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:05:45,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:05:45,726 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:05:45,727 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224212772] [2021-10-21 20:05:45,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224212772] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:05:45,727 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:05:45,727 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-21 20:05:45,728 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114839686] [2021-10-21 20:05:45,728 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-21 20:05:45,728 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:05:45,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-21 20:05:45,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-21 20:05:45,729 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:05:45,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:05:45,814 INFO L93 Difference]: Finished difference Result 47 states and 48 transitions. [2021-10-21 20:05:45,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-21 20:05:45,814 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 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 16 [2021-10-21 20:05:45,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:05:45,815 INFO L225 Difference]: With dead ends: 47 [2021-10-21 20:05:45,815 INFO L226 Difference]: Without dead ends: 47 [2021-10-21 20:05:45,816 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.8ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-21 20:05:45,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-10-21 20:05:45,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 33. [2021-10-21 20:05:45,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 29 states have internal predecessors, (31), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:05:45,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2021-10-21 20:05:45,821 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 16 [2021-10-21 20:05:45,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:05:45,822 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2021-10-21 20:05:45,822 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:05:45,822 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2021-10-21 20:05:45,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-21 20:05:45,823 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:05:45,823 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:05:45,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-21 20:05:45,824 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr14ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 16 more)] === [2021-10-21 20:05:45,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:05:45,824 INFO L82 PathProgramCache]: Analyzing trace with hash -54578950, now seen corresponding path program 1 times [2021-10-21 20:05:45,824 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:05:45,825 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510204149] [2021-10-21 20:05:45,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:05:45,825 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:05:45,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:05:45,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:05:45,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:05:45,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:05:45,917 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:05:45,917 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510204149] [2021-10-21 20:05:45,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510204149] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:05:45,918 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:05:45,918 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-21 20:05:45,918 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302367449] [2021-10-21 20:05:45,919 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-21 20:05:45,919 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:05:45,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-21 20:05:45,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-21 20:05:45,920 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:05:45,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:05:45,994 INFO L93 Difference]: Finished difference Result 32 states and 33 transitions. [2021-10-21 20:05:45,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-21 20:05:45,994 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 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 16 [2021-10-21 20:05:45,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:05:45,995 INFO L225 Difference]: With dead ends: 32 [2021-10-21 20:05:45,995 INFO L226 Difference]: Without dead ends: 32 [2021-10-21 20:05:45,996 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 37.3ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-10-21 20:05:45,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-10-21 20:05:45,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-10-21 20:05:45,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 28 states have internal predecessors, (30), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:05:46,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2021-10-21 20:05:46,000 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 16 [2021-10-21 20:05:46,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:05:46,001 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2021-10-21 20:05:46,001 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:05:46,001 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2021-10-21 20:05:46,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-21 20:05:46,002 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:05:46,002 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:05:46,002 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-21 20:05:46,002 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr15ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 16 more)] === [2021-10-21 20:05:46,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:05:46,003 INFO L82 PathProgramCache]: Analyzing trace with hash -1691947366, now seen corresponding path program 1 times [2021-10-21 20:05:46,003 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:05:46,003 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770713980] [2021-10-21 20:05:46,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:05:46,004 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:05:46,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:05:46,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:05:46,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:05:46,106 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:05:46,107 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:05:46,107 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770713980] [2021-10-21 20:05:46,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770713980] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:05:46,107 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:05:46,107 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-21 20:05:46,108 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650134632] [2021-10-21 20:05:46,108 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-21 20:05:46,108 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:05:46,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-21 20:05:46,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-21 20:05:46,109 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand has 6 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:05:46,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:05:46,213 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2021-10-21 20:05:46,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-21 20:05:46,214 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 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 17 [2021-10-21 20:05:46,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:05:46,217 INFO L225 Difference]: With dead ends: 31 [2021-10-21 20:05:46,217 INFO L226 Difference]: Without dead ends: 31 [2021-10-21 20:05:46,218 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 50.4ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-10-21 20:05:46,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-10-21 20:05:46,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-10-21 20:05:46,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 27 states have internal predecessors, (29), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:05:46,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2021-10-21 20:05:46,224 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 17 [2021-10-21 20:05:46,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:05:46,225 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2021-10-21 20:05:46,225 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:05:46,225 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2021-10-21 20:05:46,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-21 20:05:46,226 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:05:46,227 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:05:46,227 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-21 20:05:46,227 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr16ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 16 more)] === [2021-10-21 20:05:46,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:05:46,228 INFO L82 PathProgramCache]: Analyzing trace with hash -910760708, now seen corresponding path program 1 times [2021-10-21 20:05:46,228 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:05:46,228 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160251484] [2021-10-21 20:05:46,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:05:46,228 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:05:46,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:05:46,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:05:46,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:05:46,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:05:46,375 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:05:46,375 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160251484] [2021-10-21 20:05:46,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160251484] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:05:46,375 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:05:46,376 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-21 20:05:46,376 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146335480] [2021-10-21 20:05:46,376 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-21 20:05:46,376 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:05:46,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-21 20:05:46,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-21 20:05:46,377 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:05:46,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:05:46,479 INFO L93 Difference]: Finished difference Result 30 states and 31 transitions. [2021-10-21 20:05:46,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-21 20:05:46,480 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2021-10-21 20:05:46,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:05:46,484 INFO L225 Difference]: With dead ends: 30 [2021-10-21 20:05:46,484 INFO L226 Difference]: Without dead ends: 30 [2021-10-21 20:05:46,485 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 61.0ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-10-21 20:05:46,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-10-21 20:05:46,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-10-21 20:05:46,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 26 states have internal predecessors, (28), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:05:46,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2021-10-21 20:05:46,498 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 18 [2021-10-21 20:05:46,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:05:46,498 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2021-10-21 20:05:46,500 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:05:46,500 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2021-10-21 20:05:46,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-21 20:05:46,502 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:05:46,502 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:05:46,502 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-21 20:05:46,503 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr17ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 16 more)] === [2021-10-21 20:05:46,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:05:46,504 INFO L82 PathProgramCache]: Analyzing trace with hash 1831189212, now seen corresponding path program 1 times [2021-10-21 20:05:46,504 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:05:46,505 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349978279] [2021-10-21 20:05:46,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:05:46,510 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:05:46,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:05:46,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:05:46,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:05:46,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:05:46,648 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:05:46,648 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349978279] [2021-10-21 20:05:46,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349978279] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:05:46,649 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:05:46,649 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-21 20:05:46,649 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339330903] [2021-10-21 20:05:46,650 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-21 20:05:46,651 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:05:46,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-21 20:05:46,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-10-21 20:05:46,652 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:05:46,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:05:46,753 INFO L93 Difference]: Finished difference Result 29 states and 30 transitions. [2021-10-21 20:05:46,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-21 20:05:46,755 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 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 19 [2021-10-21 20:05:46,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:05:46,756 INFO L225 Difference]: With dead ends: 29 [2021-10-21 20:05:46,756 INFO L226 Difference]: Without dead ends: 29 [2021-10-21 20:05:46,756 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 71.3ms TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-10-21 20:05:46,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-10-21 20:05:46,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-10-21 20:05:46,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 23 states have (on average 1.173913043478261) internal successors, (27), 25 states have internal predecessors, (27), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:05:46,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2021-10-21 20:05:46,760 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 19 [2021-10-21 20:05:46,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:05:46,760 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2021-10-21 20:05:46,761 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:05:46,761 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2021-10-21 20:05:46,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-21 20:05:46,762 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:05:46,762 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] [2021-10-21 20:05:46,762 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-21 20:05:46,762 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr18ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 16 more)] === [2021-10-21 20:05:46,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:05:46,763 INFO L82 PathProgramCache]: Analyzing trace with hash 932290814, now seen corresponding path program 1 times [2021-10-21 20:05:46,763 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:05:46,764 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721677158] [2021-10-21 20:05:46,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:05:46,764 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:05:46,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:05:46,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:05:46,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:05:46,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:05:46,880 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:05:46,880 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721677158] [2021-10-21 20:05:46,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721677158] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:05:46,881 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:05:46,881 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-21 20:05:46,881 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715244495] [2021-10-21 20:05:46,881 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-21 20:05:46,882 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:05:46,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-21 20:05:46,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-10-21 20:05:46,884 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:05:46,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:05:46,985 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2021-10-21 20:05:46,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-21 20:05:46,986 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 1 states have call successors, (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 20 [2021-10-21 20:05:46,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:05:46,990 INFO L225 Difference]: With dead ends: 28 [2021-10-21 20:05:46,990 INFO L226 Difference]: Without dead ends: 28 [2021-10-21 20:05:46,991 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 61.8ms TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-10-21 20:05:46,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-10-21 20:05:47,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-10-21 20:05:47,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 24 states have internal predecessors, (26), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:05:47,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2021-10-21 20:05:47,006 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 20 [2021-10-21 20:05:47,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:05:47,007 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2021-10-21 20:05:47,007 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:05:47,007 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2021-10-21 20:05:47,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-21 20:05:47,008 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:05:47,008 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:05:47,008 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-21 20:05:47,009 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr19ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 16 more)] === [2021-10-21 20:05:47,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:05:47,009 INFO L82 PathProgramCache]: Analyzing trace with hash -1163755746, now seen corresponding path program 1 times [2021-10-21 20:05:47,010 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:05:47,010 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392671563] [2021-10-21 20:05:47,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:05:47,010 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:05:47,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 20:05:47,067 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-21 20:05:47,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 20:05:47,126 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-21 20:05:47,127 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-21 20:05:47,128 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location mainErr19ASSERT_VIOLATIONMEMORY_FREE [2021-10-21 20:05:47,130 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr0REQUIRES_VIOLATION [2021-10-21 20:05:47,134 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr1REQUIRES_VIOLATION [2021-10-21 20:05:47,135 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr2REQUIRES_VIOLATION [2021-10-21 20:05:47,136 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr3REQUIRES_VIOLATION [2021-10-21 20:05:47,136 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr4REQUIRES_VIOLATION [2021-10-21 20:05:47,137 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr5REQUIRES_VIOLATION [2021-10-21 20:05:47,137 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr6REQUIRES_VIOLATION [2021-10-21 20:05:47,138 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr7REQUIRES_VIOLATION [2021-10-21 20:05:47,138 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr8REQUIRES_VIOLATION [2021-10-21 20:05:47,139 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr9REQUIRES_VIOLATION [2021-10-21 20:05:47,139 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr10REQUIRES_VIOLATION [2021-10-21 20:05:47,140 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr11REQUIRES_VIOLATION [2021-10-21 20:05:47,145 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr12REQUIRES_VIOLATION [2021-10-21 20:05:47,146 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr13REQUIRES_VIOLATION [2021-10-21 20:05:47,146 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr14ASSERT_VIOLATIONMEMORY_FREE [2021-10-21 20:05:47,146 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr15ASSERT_VIOLATIONMEMORY_FREE [2021-10-21 20:05:47,146 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr16ASSERT_VIOLATIONMEMORY_FREE [2021-10-21 20:05:47,147 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr17ASSERT_VIOLATIONMEMORY_FREE [2021-10-21 20:05:47,147 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr18ASSERT_VIOLATIONMEMORY_FREE [2021-10-21 20:05:47,149 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr20ENSURES_VIOLATIONMEMORY_LEAK [2021-10-21 20:05:47,149 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-10-21 20:05:47,157 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-21 20:05:47,199 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.10 08:05:47 BoogieIcfgContainer [2021-10-21 20:05:47,199 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-21 20:05:47,200 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-21 20:05:47,200 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-21 20:05:47,200 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-21 20:05:47,201 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 08:05:44" (3/4) ... [2021-10-21 20:05:47,202 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-21 20:05:47,261 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b711d6e1-b987-4745-8bd4-63b920ef3dcf/bin/uautomizer-j4sWxH34Be/witness.graphml [2021-10-21 20:05:47,261 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-21 20:05:47,263 INFO L168 Benchmark]: Toolchain (without parser) took 3706.54 ms. Allocated memory was 136.3 MB in the beginning and 167.8 MB in the end (delta: 31.5 MB). Free memory was 106.5 MB in the beginning and 105.5 MB in the end (delta: 1.0 MB). Peak memory consumption was 30.8 MB. Max. memory is 16.1 GB. [2021-10-21 20:05:47,264 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 136.3 MB. Free memory was 91.8 MB in the beginning and 91.8 MB in the end (delta: 67.3 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-21 20:05:47,264 INFO L168 Benchmark]: CACSL2BoogieTranslator took 465.40 ms. Allocated memory is still 136.3 MB. Free memory was 106.3 MB in the beginning and 105.3 MB in the end (delta: 1.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-21 20:05:47,265 INFO L168 Benchmark]: Boogie Preprocessor took 50.53 ms. Allocated memory is still 136.3 MB. Free memory was 105.3 MB in the beginning and 102.7 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-21 20:05:47,265 INFO L168 Benchmark]: RCFGBuilder took 562.95 ms. Allocated memory is still 136.3 MB. Free memory was 102.7 MB in the beginning and 82.3 MB in the end (delta: 20.4 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. [2021-10-21 20:05:47,266 INFO L168 Benchmark]: TraceAbstraction took 2557.91 ms. Allocated memory was 136.3 MB in the beginning and 167.8 MB in the end (delta: 31.5 MB). Free memory was 81.7 MB in the beginning and 106.5 MB in the end (delta: -24.9 MB). Peak memory consumption was 9.4 MB. Max. memory is 16.1 GB. [2021-10-21 20:05:47,268 INFO L168 Benchmark]: Witness Printer took 61.57 ms. Allocated memory is still 167.8 MB. Free memory was 106.5 MB in the beginning and 105.5 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-21 20:05:47,270 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 136.3 MB. Free memory was 91.8 MB in the beginning and 91.8 MB in the end (delta: 67.3 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 465.40 ms. Allocated memory is still 136.3 MB. Free memory was 106.3 MB in the beginning and 105.3 MB in the end (delta: 1.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 50.53 ms. Allocated memory is still 136.3 MB. Free memory was 105.3 MB in the beginning and 102.7 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 562.95 ms. Allocated memory is still 136.3 MB. Free memory was 102.7 MB in the beginning and 82.3 MB in the end (delta: 20.4 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. * TraceAbstraction took 2557.91 ms. Allocated memory was 136.3 MB in the beginning and 167.8 MB in the end (delta: 31.5 MB). Free memory was 81.7 MB in the beginning and 106.5 MB in the end (delta: -24.9 MB). Peak memory consumption was 9.4 MB. Max. memory is 16.1 GB. * Witness Printer took 61.57 ms. Allocated memory is still 167.8 MB. Free memory was 106.5 MB in the beginning and 105.5 MB in the end (delta: 1.0 MB). There was no memory consumed. 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: 545]: free of unallocated memory possible free of unallocated memory possible We found a FailurePath: [L526-L533] union { void *p0; struct { char c[2]; int p1; int p2; } str; } data; [L534] data.p0 = malloc(37U) VAL [data={3:0}, malloc(37U)={-1:0}] [L535] EXPR data.p0 VAL [data={3:0}, data.p0={-1:0}] [L535] void *ptr = data.p0; [L536] COND FALSE !(__VERIFIER_nondet_int()) [L539] data.str.p2 = 30 VAL [data={3:0}, ptr={-1:0}] [L541] EXPR data.str.p2 VAL [data={3:0}, data.str.p2=30, ptr={-1:0}] [L541] COND FALSE !(25 > data.str.p2) [L544] EXPR data.p0 VAL [data={3:0}, data.p0={-1:0}, ptr={-1:0}] [L544] free(data.p0) VAL [data={3:0}, data.p0={-1:0}, ptr={-1:0}] [L544] free(data.p0) VAL [data={3:0}, data.p0={-1:0}, ptr={-1:0}] [L544] free(data.p0) [L545] free(ptr) VAL [data={3:0}, ptr={-1:0}] [L545] free(ptr) VAL [data={3:0}, ptr={-1:0}] [L545] free(ptr) VAL [data={3:0}, ptr={-1:0}] - UnprovableResult [Line: 534]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 534]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 535]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 535]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 537]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 537]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 539]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 539]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 541]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 541]: 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: 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: 544]: 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 free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 544]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 544]: 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: 524]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 9 procedures, 66 locations, 21 error locations. Started 1 CEGAR loops. OverallTime: 2436.7ms, OverallIterations: 9, TraceHistogramMax: 1, EmptinessCheckTime: 18.6ms, AutomataDifference: 906.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 11.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 166 SDtfs, 141 SDslu, 277 SDs, 0 SdLazy, 499 SolverSat, 43 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 485.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 359.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=48occurred in iteration=0, InterpolantAutomatonStates: 52, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 76.7ms AutomataMinimizationTime, 8 MinimizatonAttempts, 14 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 36.4ms SsaConstructionTime, 228.3ms SatisfiabilityAnalysisTime, 819.4ms InterpolantComputationTime, 141 NumberOfCodeBlocks, 141 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 112 ConstructedInterpolants, 0 QuantifiedInterpolants, 632 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 8 InterpolantComputations, 8 PerfectInterpolantSequences, 0/0 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 20:05:47,322 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b711d6e1-b987-4745-8bd4-63b920ef3dcf/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...