./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 4e77c044 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_033f37f1-41e5-41d4-9fb9-ab81103c5b45/bin/uautomizer-WNIpwEf4Nt/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_033f37f1-41e5-41d4-9fb9-ab81103c5b45/bin/uautomizer-WNIpwEf4Nt/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_033f37f1-41e5-41d4-9fb9-ab81103c5b45/bin/uautomizer-WNIpwEf4Nt/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_033f37f1-41e5-41d4-9fb9-ab81103c5b45/bin/uautomizer-WNIpwEf4Nt/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_033f37f1-41e5-41d4-9fb9-ab81103c5b45/bin/uautomizer-WNIpwEf4Nt/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_033f37f1-41e5-41d4-9fb9-ab81103c5b45/bin/uautomizer-WNIpwEf4Nt --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 816de43cb6e982d6a1f876f61d346a36add599ac ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 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-4e77c04 [2021-10-13 00:20:17,206 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 00:20:17,209 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 00:20:17,257 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 00:20:17,258 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 00:20:17,263 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 00:20:17,265 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 00:20:17,269 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 00:20:17,272 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 00:20:17,280 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 00:20:17,281 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 00:20:17,283 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 00:20:17,283 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 00:20:17,287 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 00:20:17,290 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 00:20:17,295 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 00:20:17,296 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 00:20:17,297 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 00:20:17,299 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 00:20:17,302 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 00:20:17,306 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 00:20:17,308 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 00:20:17,309 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 00:20:17,313 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 00:20:17,319 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 00:20:17,322 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 00:20:17,323 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 00:20:17,325 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 00:20:17,326 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 00:20:17,327 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 00:20:17,328 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 00:20:17,329 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 00:20:17,331 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 00:20:17,333 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 00:20:17,334 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 00:20:17,335 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 00:20:17,336 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 00:20:17,336 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 00:20:17,336 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 00:20:17,338 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 00:20:17,338 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 00:20:17,339 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_033f37f1-41e5-41d4-9fb9-ab81103c5b45/bin/uautomizer-WNIpwEf4Nt/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-10-13 00:20:17,377 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 00:20:17,377 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 00:20:17,378 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-13 00:20:17,378 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-13 00:20:17,379 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-13 00:20:17,379 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-13 00:20:17,380 INFO L138 SettingsManager]: * Use SBE=true [2021-10-13 00:20:17,380 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 00:20:17,380 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 00:20:17,380 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-13 00:20:17,381 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-13 00:20:17,381 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 00:20:17,381 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 00:20:17,381 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-13 00:20:17,382 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-13 00:20:17,382 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-13 00:20:17,382 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 00:20:17,382 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 00:20:17,383 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 00:20:17,383 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 00:20:17,383 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 00:20:17,383 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-13 00:20:17,384 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 00:20:17,384 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 00:20:17,384 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 00:20:17,384 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 00:20:17,385 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-13 00:20:17,385 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-13 00:20:17,385 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 00:20:17,385 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_033f37f1-41e5-41d4-9fb9-ab81103c5b45/bin/uautomizer-WNIpwEf4Nt/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_033f37f1-41e5-41d4-9fb9-ab81103c5b45/bin/uautomizer-WNIpwEf4Nt Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 816de43cb6e982d6a1f876f61d346a36add599ac [2021-10-13 00:20:17,617 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 00:20:17,639 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 00:20:17,641 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 00:20:17,643 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 00:20:17,644 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 00:20:17,645 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_033f37f1-41e5-41d4-9fb9-ab81103c5b45/bin/uautomizer-WNIpwEf4Nt/../../sv-benchmarks/c/list-ext-properties/test-0158_1-3.i [2021-10-13 00:20:17,727 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_033f37f1-41e5-41d4-9fb9-ab81103c5b45/bin/uautomizer-WNIpwEf4Nt/data/89d76e59d/b714548fb37f46d999854258633906ec/FLAGfab2e9b70 [2021-10-13 00:20:18,312 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 00:20:18,312 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_033f37f1-41e5-41d4-9fb9-ab81103c5b45/sv-benchmarks/c/list-ext-properties/test-0158_1-3.i [2021-10-13 00:20:18,330 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_033f37f1-41e5-41d4-9fb9-ab81103c5b45/bin/uautomizer-WNIpwEf4Nt/data/89d76e59d/b714548fb37f46d999854258633906ec/FLAGfab2e9b70 [2021-10-13 00:20:18,573 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_033f37f1-41e5-41d4-9fb9-ab81103c5b45/bin/uautomizer-WNIpwEf4Nt/data/89d76e59d/b714548fb37f46d999854258633906ec [2021-10-13 00:20:18,576 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 00:20:18,577 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-13 00:20:18,579 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 00:20:18,580 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 00:20:18,584 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 00:20:18,585 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 12:20:18" (1/1) ... [2021-10-13 00:20:18,586 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a804398 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:20:18, skipping insertion in model container [2021-10-13 00:20:18,586 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 12:20:18" (1/1) ... [2021-10-13 00:20:18,595 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 00:20:18,644 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 00:20:18,965 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 00:20:18,977 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 00:20:19,025 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 00:20:19,061 INFO L208 MainTranslator]: Completed translation [2021-10-13 00:20:19,062 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:20:19 WrapperNode [2021-10-13 00:20:19,062 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 00:20:19,063 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 00:20:19,063 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 00:20:19,064 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 00:20:19,077 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:20:19" (1/1) ... [2021-10-13 00:20:19,077 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:20:19" (1/1) ... [2021-10-13 00:20:19,092 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:20:19" (1/1) ... [2021-10-13 00:20:19,093 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:20:19" (1/1) ... [2021-10-13 00:20:19,109 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:20:19" (1/1) ... [2021-10-13 00:20:19,111 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:20:19" (1/1) ... [2021-10-13 00:20:19,115 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:20:19" (1/1) ... [2021-10-13 00:20:19,122 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 00:20:19,123 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 00:20:19,123 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 00:20:19,124 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 00:20:19,125 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:20:19" (1/1) ... [2021-10-13 00:20:19,140 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 00:20:19,153 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_033f37f1-41e5-41d4-9fb9-ab81103c5b45/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:20:19,184 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_033f37f1-41e5-41d4-9fb9-ab81103c5b45/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 00:20:19,216 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_033f37f1-41e5-41d4-9fb9-ab81103c5b45/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 00:20:19,245 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-10-13 00:20:19,246 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 00:20:19,247 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-10-13 00:20:19,248 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-10-13 00:20:19,248 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-10-13 00:20:19,248 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2021-10-13 00:20:19,248 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2021-10-13 00:20:19,249 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2021-10-13 00:20:19,249 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-10-13 00:20:19,250 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-10-13 00:20:19,250 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-10-13 00:20:19,251 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-10-13 00:20:19,251 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-10-13 00:20:19,251 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-10-13 00:20:19,251 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 00:20:19,252 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-10-13 00:20:19,252 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-10-13 00:20:19,252 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-10-13 00:20:19,252 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-10-13 00:20:19,252 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-10-13 00:20:19,253 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-10-13 00:20:19,253 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-10-13 00:20:19,253 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-10-13 00:20:19,253 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-10-13 00:20:19,253 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-10-13 00:20:19,254 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-10-13 00:20:19,254 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-10-13 00:20:19,254 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-10-13 00:20:19,254 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-10-13 00:20:19,254 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-10-13 00:20:19,255 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-10-13 00:20:19,255 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-10-13 00:20:19,255 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-10-13 00:20:19,256 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2021-10-13 00:20:19,256 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2021-10-13 00:20:19,256 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2021-10-13 00:20:19,256 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-10-13 00:20:19,256 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-10-13 00:20:19,257 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-10-13 00:20:19,257 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-10-13 00:20:19,257 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-10-13 00:20:19,257 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-10-13 00:20:19,257 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-10-13 00:20:19,258 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-10-13 00:20:19,258 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-10-13 00:20:19,258 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-10-13 00:20:19,258 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-10-13 00:20:19,258 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-10-13 00:20:19,259 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-10-13 00:20:19,259 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-10-13 00:20:19,260 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-10-13 00:20:19,261 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-10-13 00:20:19,261 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-10-13 00:20:19,261 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-10-13 00:20:19,261 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-10-13 00:20:19,261 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-10-13 00:20:19,261 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-10-13 00:20:19,262 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-10-13 00:20:19,262 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-10-13 00:20:19,262 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-10-13 00:20:19,263 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-10-13 00:20:19,263 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-10-13 00:20:19,263 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-10-13 00:20:19,263 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-10-13 00:20:19,263 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-10-13 00:20:19,264 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-10-13 00:20:19,264 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-10-13 00:20:19,265 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-10-13 00:20:19,266 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-10-13 00:20:19,266 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-10-13 00:20:19,267 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-10-13 00:20:19,267 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-10-13 00:20:19,268 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-10-13 00:20:19,268 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-10-13 00:20:19,268 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-10-13 00:20:19,268 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-10-13 00:20:19,268 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-10-13 00:20:19,269 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-10-13 00:20:19,269 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-10-13 00:20:19,269 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-10-13 00:20:19,270 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-10-13 00:20:19,270 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-10-13 00:20:19,270 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-10-13 00:20:19,271 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-10-13 00:20:19,271 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-10-13 00:20:19,271 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-10-13 00:20:19,272 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-10-13 00:20:19,272 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-10-13 00:20:19,272 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-10-13 00:20:19,272 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-10-13 00:20:19,272 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-10-13 00:20:19,273 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-10-13 00:20:19,273 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-10-13 00:20:19,273 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-10-13 00:20:19,273 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-10-13 00:20:19,273 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-10-13 00:20:19,274 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-10-13 00:20:19,274 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-10-13 00:20:19,274 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-10-13 00:20:19,274 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-10-13 00:20:19,274 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-10-13 00:20:19,274 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-10-13 00:20:19,275 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-10-13 00:20:19,275 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-10-13 00:20:19,275 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-10-13 00:20:19,276 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-10-13 00:20:19,276 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-10-13 00:20:19,276 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-10-13 00:20:19,276 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-10-13 00:20:19,276 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-10-13 00:20:19,277 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-10-13 00:20:19,277 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-10-13 00:20:19,277 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-10-13 00:20:19,278 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-10-13 00:20:19,278 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-10-13 00:20:19,278 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-10-13 00:20:19,279 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-10-13 00:20:19,279 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-10-13 00:20:19,279 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-10-13 00:20:19,279 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-10-13 00:20:19,279 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-10-13 00:20:19,280 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-10-13 00:20:19,280 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-10-13 00:20:19,280 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-13 00:20:19,280 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-13 00:20:19,281 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-13 00:20:19,281 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-13 00:20:19,281 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-13 00:20:19,282 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-13 00:20:19,283 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-10-13 00:20:19,286 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-13 00:20:19,286 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 00:20:19,880 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 00:20:19,881 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-10-13 00:20:19,883 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 12:20:19 BoogieIcfgContainer [2021-10-13 00:20:19,883 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 00:20:19,887 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 00:20:19,887 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 00:20:19,891 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 00:20:19,900 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 12:20:18" (1/3) ... [2021-10-13 00:20:19,901 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@778c6762 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 12:20:19, skipping insertion in model container [2021-10-13 00:20:19,901 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:20:19" (2/3) ... [2021-10-13 00:20:19,902 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@778c6762 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 12:20:19, skipping insertion in model container [2021-10-13 00:20:19,902 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 12:20:19" (3/3) ... [2021-10-13 00:20:19,903 INFO L111 eAbstractionObserver]: Analyzing ICFG test-0158_1-3.i [2021-10-13 00:20:19,910 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 00:20:19,910 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 21 error locations. [2021-10-13 00:20:19,978 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 00:20:19,985 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, mConcurrency=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 [2021-10-13 00:20:19,985 INFO L340 AbstractCegarLoop]: Starting to check reachability of 21 error locations. [2021-10-13 00:20:20,002 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) [2021-10-13 00:20:20,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-13 00:20:20,010 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:20:20,011 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:20:20,012 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 16 more)] === [2021-10-13 00:20:20,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:20:20,017 INFO L82 PathProgramCache]: Analyzing trace with hash 1605920523, now seen corresponding path program 1 times [2021-10-13 00:20:20,026 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:20:20,026 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940679115] [2021-10-13 00:20:20,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:20:20,028 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:20:20,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:20:20,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:20:20,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:20:20,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:20:20,276 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:20:20,276 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940679115] [2021-10-13 00:20:20,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940679115] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:20:20,278 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:20:20,278 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-13 00:20:20,280 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32721653] [2021-10-13 00:20:20,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 00:20:20,285 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:20:20,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 00:20:20,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 00:20:20,302 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) [2021-10-13 00:20:20,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:20:20,455 INFO L93 Difference]: Finished difference Result 41 states and 42 transitions. [2021-10-13 00:20:20,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 00:20:20,457 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 [2021-10-13 00:20:20,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:20:20,465 INFO L225 Difference]: With dead ends: 41 [2021-10-13 00:20:20,465 INFO L226 Difference]: Without dead ends: 38 [2021-10-13 00:20:20,467 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.7ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 00:20:20,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-10-13 00:20:20,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-10-13 00:20:20,500 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) [2021-10-13 00:20:20,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2021-10-13 00:20:20,503 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 7 [2021-10-13 00:20:20,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:20:20,503 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2021-10-13 00:20:20,504 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) [2021-10-13 00:20:20,504 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2021-10-13 00:20:20,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-13 00:20:20,504 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:20:20,504 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:20:20,505 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-13 00:20:20,505 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 16 more)] === [2021-10-13 00:20:20,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:20:20,506 INFO L82 PathProgramCache]: Analyzing trace with hash 1605920524, now seen corresponding path program 1 times [2021-10-13 00:20:20,506 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:20:20,506 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763905127] [2021-10-13 00:20:20,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:20:20,507 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:20:20,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:20:20,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:20:20,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:20:20,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:20:20,670 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:20:20,670 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763905127] [2021-10-13 00:20:20,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763905127] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:20:20,671 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:20:20,671 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-13 00:20:20,671 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822748350] [2021-10-13 00:20:20,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 00:20:20,673 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:20:20,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 00:20:20,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 00:20:20,675 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) [2021-10-13 00:20:20,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:20:20,749 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2021-10-13 00:20:20,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 00:20:20,750 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 [2021-10-13 00:20:20,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:20:20,751 INFO L225 Difference]: With dead ends: 31 [2021-10-13 00:20:20,751 INFO L226 Difference]: Without dead ends: 31 [2021-10-13 00:20:20,752 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 49.1ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 00:20:20,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-10-13 00:20:20,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-10-13 00:20:20,756 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) [2021-10-13 00:20:20,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2021-10-13 00:20:20,758 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 7 [2021-10-13 00:20:20,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:20:20,758 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2021-10-13 00:20:20,758 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) [2021-10-13 00:20:20,759 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2021-10-13 00:20:20,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-13 00:20:20,759 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:20:20,760 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:20:20,760 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-13 00:20:20,760 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr14ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 16 more)] === [2021-10-13 00:20:20,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:20:20,786 INFO L82 PathProgramCache]: Analyzing trace with hash -202342310, now seen corresponding path program 1 times [2021-10-13 00:20:20,786 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:20:20,787 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390279864] [2021-10-13 00:20:20,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:20:20,787 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:20:20,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:20:20,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:20:20,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:20:20,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:20:20,902 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:20:20,903 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390279864] [2021-10-13 00:20:20,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390279864] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:20:20,903 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:20:20,903 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-13 00:20:20,904 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905234847] [2021-10-13 00:20:20,904 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-13 00:20:20,905 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:20:20,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-13 00:20:20,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-13 00:20:20,906 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) [2021-10-13 00:20:21,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:20:21,042 INFO L93 Difference]: Finished difference Result 47 states and 48 transitions. [2021-10-13 00:20:21,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 00:20:21,043 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 [2021-10-13 00:20:21,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:20:21,050 INFO L225 Difference]: With dead ends: 47 [2021-10-13 00:20:21,050 INFO L226 Difference]: Without dead ends: 47 [2021-10-13 00:20:21,051 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 37.7ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-13 00:20:21,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-10-13 00:20:21,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 33. [2021-10-13 00:20:21,059 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) [2021-10-13 00:20:21,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2021-10-13 00:20:21,062 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 16 [2021-10-13 00:20:21,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:20:21,064 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2021-10-13 00:20:21,064 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) [2021-10-13 00:20:21,064 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2021-10-13 00:20:21,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-13 00:20:21,066 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:20:21,066 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:20:21,066 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-13 00:20:21,067 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr14ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 16 more)] === [2021-10-13 00:20:21,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:20:21,071 INFO L82 PathProgramCache]: Analyzing trace with hash -54578950, now seen corresponding path program 1 times [2021-10-13 00:20:21,071 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:20:21,072 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432306773] [2021-10-13 00:20:21,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:20:21,072 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:20:21,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:20:21,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:20:21,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:20:21,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:20:21,224 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:20:21,224 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432306773] [2021-10-13 00:20:21,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432306773] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:20:21,225 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:20:21,225 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-13 00:20:21,225 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009229904] [2021-10-13 00:20:21,226 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 00:20:21,226 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:20:21,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 00:20:21,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-13 00:20:21,228 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) [2021-10-13 00:20:21,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:20:21,349 INFO L93 Difference]: Finished difference Result 32 states and 33 transitions. [2021-10-13 00:20:21,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-13 00:20:21,350 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 [2021-10-13 00:20:21,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:20:21,351 INFO L225 Difference]: With dead ends: 32 [2021-10-13 00:20:21,351 INFO L226 Difference]: Without dead ends: 32 [2021-10-13 00:20:21,351 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 44.8ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-10-13 00:20:21,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-10-13 00:20:21,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-10-13 00:20:21,355 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) [2021-10-13 00:20:21,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2021-10-13 00:20:21,357 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 16 [2021-10-13 00:20:21,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:20:21,357 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2021-10-13 00:20:21,357 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) [2021-10-13 00:20:21,357 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2021-10-13 00:20:21,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-13 00:20:21,358 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:20:21,358 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:20:21,359 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-13 00:20:21,359 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr15ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 16 more)] === [2021-10-13 00:20:21,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:20:21,360 INFO L82 PathProgramCache]: Analyzing trace with hash -1691947366, now seen corresponding path program 1 times [2021-10-13 00:20:21,360 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:20:21,360 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267256781] [2021-10-13 00:20:21,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:20:21,367 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:20:21,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:20:21,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:20:21,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:20:21,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:20:21,511 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:20:21,511 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267256781] [2021-10-13 00:20:21,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267256781] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:20:21,512 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:20:21,512 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-13 00:20:21,512 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051501851] [2021-10-13 00:20:21,514 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 00:20:21,515 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:20:21,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 00:20:21,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-13 00:20:21,518 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) [2021-10-13 00:20:21,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:20:21,618 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2021-10-13 00:20:21,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-13 00:20:21,619 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 [2021-10-13 00:20:21,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:20:21,620 INFO L225 Difference]: With dead ends: 31 [2021-10-13 00:20:21,620 INFO L226 Difference]: Without dead ends: 31 [2021-10-13 00:20:21,620 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 60.0ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-10-13 00:20:21,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-10-13 00:20:21,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-10-13 00:20:21,624 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) [2021-10-13 00:20:21,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2021-10-13 00:20:21,625 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 17 [2021-10-13 00:20:21,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:20:21,625 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2021-10-13 00:20:21,625 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) [2021-10-13 00:20:21,626 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2021-10-13 00:20:21,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-13 00:20:21,626 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:20:21,626 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:20:21,627 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-13 00:20:21,627 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr16ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 16 more)] === [2021-10-13 00:20:21,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:20:21,628 INFO L82 PathProgramCache]: Analyzing trace with hash -910760708, now seen corresponding path program 1 times [2021-10-13 00:20:21,628 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:20:21,628 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881809563] [2021-10-13 00:20:21,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:20:21,629 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:20:21,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:20:21,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:20:21,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:20:21,732 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:20:21,733 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:20:21,733 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881809563] [2021-10-13 00:20:21,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881809563] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:20:21,733 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:20:21,733 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-13 00:20:21,734 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727770102] [2021-10-13 00:20:21,734 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 00:20:21,734 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:20:21,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 00:20:21,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-13 00:20:21,735 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) [2021-10-13 00:20:21,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:20:21,819 INFO L93 Difference]: Finished difference Result 30 states and 31 transitions. [2021-10-13 00:20:21,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-13 00:20:21,820 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 [2021-10-13 00:20:21,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:20:21,824 INFO L225 Difference]: With dead ends: 30 [2021-10-13 00:20:21,824 INFO L226 Difference]: Without dead ends: 30 [2021-10-13 00:20:21,825 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 40.5ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-10-13 00:20:21,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-10-13 00:20:21,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-10-13 00:20:21,833 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) [2021-10-13 00:20:21,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2021-10-13 00:20:21,839 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 18 [2021-10-13 00:20:21,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:20:21,840 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2021-10-13 00:20:21,841 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) [2021-10-13 00:20:21,842 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2021-10-13 00:20:21,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-13 00:20:21,844 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:20:21,844 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:20:21,844 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-13 00:20:21,845 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr17ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 16 more)] === [2021-10-13 00:20:21,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:20:21,846 INFO L82 PathProgramCache]: Analyzing trace with hash 1831189212, now seen corresponding path program 1 times [2021-10-13 00:20:21,846 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:20:21,847 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180929534] [2021-10-13 00:20:21,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:20:21,851 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:20:21,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:20:21,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:20:21,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:20:21,986 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:20:21,986 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:20:21,986 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180929534] [2021-10-13 00:20:21,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180929534] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:20:21,987 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:20:21,987 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-13 00:20:21,987 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802975201] [2021-10-13 00:20:21,988 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-13 00:20:21,988 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:20:21,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-13 00:20:21,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-10-13 00:20:21,989 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) [2021-10-13 00:20:22,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:20:22,086 INFO L93 Difference]: Finished difference Result 29 states and 30 transitions. [2021-10-13 00:20:22,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-13 00:20:22,090 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 [2021-10-13 00:20:22,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:20:22,092 INFO L225 Difference]: With dead ends: 29 [2021-10-13 00:20:22,092 INFO L226 Difference]: Without dead ends: 29 [2021-10-13 00:20:22,093 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 80.1ms TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-10-13 00:20:22,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-10-13 00:20:22,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-10-13 00:20:22,099 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) [2021-10-13 00:20:22,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2021-10-13 00:20:22,103 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 19 [2021-10-13 00:20:22,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:20:22,103 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2021-10-13 00:20:22,103 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) [2021-10-13 00:20:22,103 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2021-10-13 00:20:22,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-13 00:20:22,105 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:20:22,105 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] [2021-10-13 00:20:22,105 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-13 00:20:22,105 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr18ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 16 more)] === [2021-10-13 00:20:22,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:20:22,106 INFO L82 PathProgramCache]: Analyzing trace with hash 932290814, now seen corresponding path program 1 times [2021-10-13 00:20:22,106 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:20:22,107 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220053345] [2021-10-13 00:20:22,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:20:22,107 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:20:22,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:20:22,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:20:22,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:20:22,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:20:22,257 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:20:22,257 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220053345] [2021-10-13 00:20:22,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220053345] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:20:22,258 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:20:22,258 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-13 00:20:22,258 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283033181] [2021-10-13 00:20:22,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-13 00:20:22,259 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:20:22,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-13 00:20:22,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-10-13 00:20:22,260 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) [2021-10-13 00:20:22,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:20:22,370 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2021-10-13 00:20:22,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-13 00:20:22,370 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 [2021-10-13 00:20:22,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:20:22,371 INFO L225 Difference]: With dead ends: 28 [2021-10-13 00:20:22,371 INFO L226 Difference]: Without dead ends: 28 [2021-10-13 00:20:22,372 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 77.5ms TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-10-13 00:20:22,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-10-13 00:20:22,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-10-13 00:20:22,374 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) [2021-10-13 00:20:22,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2021-10-13 00:20:22,375 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 20 [2021-10-13 00:20:22,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:20:22,376 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2021-10-13 00:20:22,376 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) [2021-10-13 00:20:22,376 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2021-10-13 00:20:22,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-13 00:20:22,377 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:20:22,377 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] [2021-10-13 00:20:22,377 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-13 00:20:22,378 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr19ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 16 more)] === [2021-10-13 00:20:22,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:20:22,378 INFO L82 PathProgramCache]: Analyzing trace with hash -1163755746, now seen corresponding path program 1 times [2021-10-13 00:20:22,379 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:20:22,379 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447807546] [2021-10-13 00:20:22,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:20:22,379 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:20:22,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 00:20:22,400 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-13 00:20:22,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 00:20:22,464 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-13 00:20:22,464 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-13 00:20:22,465 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location mainErr19ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 00:20:22,467 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr0REQUIRES_VIOLATION [2021-10-13 00:20:22,469 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr1REQUIRES_VIOLATION [2021-10-13 00:20:22,473 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr2REQUIRES_VIOLATION [2021-10-13 00:20:22,473 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr3REQUIRES_VIOLATION [2021-10-13 00:20:22,473 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr4REQUIRES_VIOLATION [2021-10-13 00:20:22,473 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr5REQUIRES_VIOLATION [2021-10-13 00:20:22,474 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr6REQUIRES_VIOLATION [2021-10-13 00:20:22,476 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr7REQUIRES_VIOLATION [2021-10-13 00:20:22,476 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr8REQUIRES_VIOLATION [2021-10-13 00:20:22,476 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr9REQUIRES_VIOLATION [2021-10-13 00:20:22,476 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr10REQUIRES_VIOLATION [2021-10-13 00:20:22,477 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr11REQUIRES_VIOLATION [2021-10-13 00:20:22,482 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr12REQUIRES_VIOLATION [2021-10-13 00:20:22,482 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr13REQUIRES_VIOLATION [2021-10-13 00:20:22,482 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr14ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 00:20:22,482 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr15ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 00:20:22,483 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr16ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 00:20:22,483 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr17ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 00:20:22,483 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr18ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 00:20:22,483 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr20ENSURES_VIOLATIONMEMORY_LEAK [2021-10-13 00:20:22,484 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-10-13 00:20:22,491 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-13 00:20:22,536 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 12:20:22 BoogieIcfgContainer [2021-10-13 00:20:22,536 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-13 00:20:22,537 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-13 00:20:22,537 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-13 00:20:22,537 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-13 00:20:22,538 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 12:20:19" (3/4) ... [2021-10-13 00:20:22,540 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-13 00:20:22,600 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_033f37f1-41e5-41d4-9fb9-ab81103c5b45/bin/uautomizer-WNIpwEf4Nt/witness.graphml [2021-10-13 00:20:22,600 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-13 00:20:22,602 INFO L168 Benchmark]: Toolchain (without parser) took 4023.08 ms. Allocated memory was 96.5 MB in the beginning and 117.4 MB in the end (delta: 21.0 MB). Free memory was 62.5 MB in the beginning and 85.2 MB in the end (delta: -22.7 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 00:20:22,602 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 96.5 MB. Free memory is still 48.2 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 00:20:22,602 INFO L168 Benchmark]: CACSL2BoogieTranslator took 483.23 ms. Allocated memory is still 96.5 MB. Free memory was 62.3 MB in the beginning and 65.2 MB in the end (delta: -2.8 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-10-13 00:20:22,603 INFO L168 Benchmark]: Boogie Preprocessor took 59.08 ms. Allocated memory is still 96.5 MB. Free memory was 64.8 MB in the beginning and 62.7 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 00:20:22,604 INFO L168 Benchmark]: RCFGBuilder took 759.92 ms. Allocated memory was 96.5 MB in the beginning and 117.4 MB in the end (delta: 21.0 MB). Free memory was 62.4 MB in the beginning and 91.7 MB in the end (delta: -29.3 MB). Peak memory consumption was 24.3 MB. Max. memory is 16.1 GB. [2021-10-13 00:20:22,604 INFO L168 Benchmark]: TraceAbstraction took 2649.62 ms. Allocated memory is still 117.4 MB. Free memory was 91.7 MB in the beginning and 87.3 MB in the end (delta: 4.3 MB). Peak memory consumption was 45.8 MB. Max. memory is 16.1 GB. [2021-10-13 00:20:22,604 INFO L168 Benchmark]: Witness Printer took 62.94 ms. Allocated memory is still 117.4 MB. Free memory was 87.3 MB in the beginning and 85.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 00:20:22,606 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 96.5 MB. Free memory is still 48.2 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 483.23 ms. Allocated memory is still 96.5 MB. Free memory was 62.3 MB in the beginning and 65.2 MB in the end (delta: -2.8 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 59.08 ms. Allocated memory is still 96.5 MB. Free memory was 64.8 MB in the beginning and 62.7 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 759.92 ms. Allocated memory was 96.5 MB in the beginning and 117.4 MB in the end (delta: 21.0 MB). Free memory was 62.4 MB in the beginning and 91.7 MB in the end (delta: -29.3 MB). Peak memory consumption was 24.3 MB. Max. memory is 16.1 GB. * TraceAbstraction took 2649.62 ms. Allocated memory is still 117.4 MB. Free memory was 91.7 MB in the beginning and 87.3 MB in the end (delta: 4.3 MB). Peak memory consumption was 45.8 MB. Max. memory is 16.1 GB. * Witness Printer took 62.94 ms. Allocated memory is still 117.4 MB. Free memory was 87.3 MB in the beginning and 85.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 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: 2513.0ms, OverallIterations: 9, TraceHistogramMax: 1, EmptinessCheckTime: 20.8ms, AutomataDifference: 944.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 11.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 166 SDtfs, 141 SDslu, 277 SDs, 0 SdLazy, 499 SolverSat, 43 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 509.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 414.5ms 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: 72.6ms AutomataMinimizationTime, 8 MinimizatonAttempts, 14 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 32.8ms SsaConstructionTime, 230.9ms SatisfiabilityAnalysisTime, 827.7ms 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! [2021-10-13 00:20:22,655 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_033f37f1-41e5-41d4-9fb9-ab81103c5b45/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...