./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-ext-properties/960521-1_1-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 57096758 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_595efb3e-dd63-4783-9af9-d1a03ea59c1a/bin/uautomizer-hJ6jxDFKc3/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_595efb3e-dd63-4783-9af9-d1a03ea59c1a/bin/uautomizer-hJ6jxDFKc3/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_595efb3e-dd63-4783-9af9-d1a03ea59c1a/bin/uautomizer-hJ6jxDFKc3/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_595efb3e-dd63-4783-9af9-d1a03ea59c1a/bin/uautomizer-hJ6jxDFKc3/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-ext-properties/960521-1_1-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_595efb3e-dd63-4783-9af9-d1a03ea59c1a/bin/uautomizer-hJ6jxDFKc3/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_595efb3e-dd63-4783-9af9-d1a03ea59c1a/bin/uautomizer-hJ6jxDFKc3 --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 978f701fee046cd9a3f43bfb12d114d1876d2f10 .............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(valid-deref) --- Real Ultimate output --- This is Ultimate 0.2.1-dev-5709675 [2021-10-15 19:42:58,144 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-15 19:42:58,148 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-15 19:42:58,209 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-15 19:42:58,210 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-15 19:42:58,216 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-15 19:42:58,219 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-15 19:42:58,222 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-15 19:42:58,224 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-15 19:42:58,225 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-15 19:42:58,226 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-15 19:42:58,228 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-15 19:42:58,229 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-15 19:42:58,230 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-15 19:42:58,232 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-15 19:42:58,234 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-15 19:42:58,236 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-15 19:42:58,237 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-15 19:42:58,240 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-15 19:42:58,243 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-15 19:42:58,246 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-15 19:42:58,253 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-15 19:42:58,255 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-15 19:42:58,256 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-15 19:42:58,265 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-15 19:42:58,267 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-15 19:42:58,268 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-15 19:42:58,269 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-15 19:42:58,272 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-15 19:42:58,273 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-15 19:42:58,275 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-15 19:42:58,277 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-15 19:42:58,279 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-15 19:42:58,281 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-15 19:42:58,283 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-15 19:42:58,284 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-15 19:42:58,285 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-15 19:42:58,285 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-15 19:42:58,286 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-15 19:42:58,287 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-15 19:42:58,288 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-15 19:42:58,289 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_595efb3e-dd63-4783-9af9-d1a03ea59c1a/bin/uautomizer-hJ6jxDFKc3/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-10-15 19:42:58,340 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-15 19:42:58,345 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-15 19:42:58,346 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-15 19:42:58,346 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-15 19:42:58,358 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-15 19:42:58,358 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-15 19:42:58,358 INFO L138 SettingsManager]: * Use SBE=true [2021-10-15 19:42:58,358 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-15 19:42:58,358 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-15 19:42:58,358 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-15 19:42:58,359 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-15 19:42:58,359 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-15 19:42:58,359 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-15 19:42:58,359 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-15 19:42:58,360 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-15 19:42:58,360 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-15 19:42:58,360 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-15 19:42:58,360 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-15 19:42:58,360 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-15 19:42:58,361 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-15 19:42:58,361 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-15 19:42:58,361 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-15 19:42:58,361 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-15 19:42:58,361 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 19:42:58,361 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-15 19:42:58,362 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-15 19:42:58,362 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-15 19:42:58,362 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-15 19:42:58,362 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-15 19:42:58,362 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_595efb3e-dd63-4783-9af9-d1a03ea59c1a/bin/uautomizer-hJ6jxDFKc3/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_595efb3e-dd63-4783-9af9-d1a03ea59c1a/bin/uautomizer-hJ6jxDFKc3 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 978f701fee046cd9a3f43bfb12d114d1876d2f10 [2021-10-15 19:42:58,682 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-15 19:42:58,731 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-15 19:42:58,734 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-15 19:42:58,736 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-15 19:42:58,738 INFO L275 PluginConnector]: CDTParser initialized [2021-10-15 19:42:58,739 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_595efb3e-dd63-4783-9af9-d1a03ea59c1a/bin/uautomizer-hJ6jxDFKc3/../../sv-benchmarks/c/list-ext-properties/960521-1_1-1.i [2021-10-15 19:42:58,831 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_595efb3e-dd63-4783-9af9-d1a03ea59c1a/bin/uautomizer-hJ6jxDFKc3/data/14ffb7a34/55caf03484034ca0a088dfe12e503e76/FLAG935376936 [2021-10-15 19:42:59,483 INFO L306 CDTParser]: Found 1 translation units. [2021-10-15 19:42:59,484 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_595efb3e-dd63-4783-9af9-d1a03ea59c1a/sv-benchmarks/c/list-ext-properties/960521-1_1-1.i [2021-10-15 19:42:59,509 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_595efb3e-dd63-4783-9af9-d1a03ea59c1a/bin/uautomizer-hJ6jxDFKc3/data/14ffb7a34/55caf03484034ca0a088dfe12e503e76/FLAG935376936 [2021-10-15 19:42:59,745 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_595efb3e-dd63-4783-9af9-d1a03ea59c1a/bin/uautomizer-hJ6jxDFKc3/data/14ffb7a34/55caf03484034ca0a088dfe12e503e76 [2021-10-15 19:42:59,749 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-15 19:42:59,751 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-15 19:42:59,753 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-15 19:42:59,754 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-15 19:42:59,759 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-15 19:42:59,760 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 07:42:59" (1/1) ... [2021-10-15 19:42:59,762 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@277532df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:42:59, skipping insertion in model container [2021-10-15 19:42:59,763 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 07:42:59" (1/1) ... [2021-10-15 19:42:59,774 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-15 19:42:59,838 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-15 19:43:00,330 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 19:43:00,349 INFO L203 MainTranslator]: Completed pre-run [2021-10-15 19:43:00,424 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 19:43:00,467 INFO L208 MainTranslator]: Completed translation [2021-10-15 19:43:00,469 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:43:00 WrapperNode [2021-10-15 19:43:00,469 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-15 19:43:00,471 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-15 19:43:00,471 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-15 19:43:00,471 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-15 19:43:00,487 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:43:00" (1/1) ... [2021-10-15 19:43:00,490 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:43:00" (1/1) ... [2021-10-15 19:43:00,526 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:43:00" (1/1) ... [2021-10-15 19:43:00,534 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:43:00" (1/1) ... [2021-10-15 19:43:00,558 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:43:00" (1/1) ... [2021-10-15 19:43:00,564 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:43:00" (1/1) ... [2021-10-15 19:43:00,590 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:43:00" (1/1) ... [2021-10-15 19:43:00,599 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-15 19:43:00,605 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-15 19:43:00,606 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-15 19:43:00,606 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-15 19:43:00,613 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:43:00" (1/1) ... [2021-10-15 19:43:00,640 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 19:43:00,655 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_595efb3e-dd63-4783-9af9-d1a03ea59c1a/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:43:00,670 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_595efb3e-dd63-4783-9af9-d1a03ea59c1a/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-15 19:43:00,689 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_595efb3e-dd63-4783-9af9-d1a03ea59c1a/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-15 19:43:00,728 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-10-15 19:43:00,728 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-15 19:43:00,728 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-10-15 19:43:00,728 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-10-15 19:43:00,729 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-10-15 19:43:00,729 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2021-10-15 19:43:00,729 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2021-10-15 19:43:00,729 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2021-10-15 19:43:00,730 INFO L138 BoogieDeclarations]: Found implementation of procedure foo [2021-10-15 19:43:00,730 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-10-15 19:43:00,730 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-10-15 19:43:00,730 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-10-15 19:43:00,731 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-10-15 19:43:00,731 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-10-15 19:43:00,731 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-10-15 19:43:00,731 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-15 19:43:00,732 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-10-15 19:43:00,732 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-10-15 19:43:00,732 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-10-15 19:43:00,732 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-10-15 19:43:00,733 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-10-15 19:43:00,733 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-10-15 19:43:00,733 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-10-15 19:43:00,733 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-10-15 19:43:00,733 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-10-15 19:43:00,734 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-10-15 19:43:00,734 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-10-15 19:43:00,734 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-10-15 19:43:00,734 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-10-15 19:43:00,735 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-10-15 19:43:00,735 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-10-15 19:43:00,735 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-10-15 19:43:00,735 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-10-15 19:43:00,736 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-10-15 19:43:00,736 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2021-10-15 19:43:00,736 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2021-10-15 19:43:00,736 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2021-10-15 19:43:00,737 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-10-15 19:43:00,737 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-10-15 19:43:00,737 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-10-15 19:43:00,737 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-10-15 19:43:00,738 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-10-15 19:43:00,738 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-10-15 19:43:00,738 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-10-15 19:43:00,738 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-10-15 19:43:00,738 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-10-15 19:43:00,739 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-10-15 19:43:00,739 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-10-15 19:43:00,739 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-10-15 19:43:00,739 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-10-15 19:43:00,740 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-10-15 19:43:00,740 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-10-15 19:43:00,740 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-10-15 19:43:00,740 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-10-15 19:43:00,741 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-10-15 19:43:00,741 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-10-15 19:43:00,741 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-10-15 19:43:00,741 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-10-15 19:43:00,742 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-10-15 19:43:00,742 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-10-15 19:43:00,742 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-10-15 19:43:00,742 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-10-15 19:43:00,743 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-10-15 19:43:00,743 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-10-15 19:43:00,743 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-10-15 19:43:00,743 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-10-15 19:43:00,743 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-10-15 19:43:00,744 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-10-15 19:43:00,744 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-10-15 19:43:00,744 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-10-15 19:43:00,745 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-10-15 19:43:00,745 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-10-15 19:43:00,745 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-10-15 19:43:00,745 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-10-15 19:43:00,746 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-10-15 19:43:00,746 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-10-15 19:43:00,746 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-10-15 19:43:00,746 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-10-15 19:43:00,747 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-10-15 19:43:00,747 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-10-15 19:43:00,747 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-10-15 19:43:00,747 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-10-15 19:43:00,747 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-10-15 19:43:00,748 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-10-15 19:43:00,748 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-10-15 19:43:00,748 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-10-15 19:43:00,748 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-10-15 19:43:00,749 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-10-15 19:43:00,749 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-10-15 19:43:00,749 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-10-15 19:43:00,749 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-10-15 19:43:00,750 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-10-15 19:43:00,750 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-10-15 19:43:00,750 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-10-15 19:43:00,750 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-10-15 19:43:00,751 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-10-15 19:43:00,751 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-10-15 19:43:00,751 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-10-15 19:43:00,751 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-10-15 19:43:00,752 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-10-15 19:43:00,752 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-10-15 19:43:00,752 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-10-15 19:43:00,752 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-10-15 19:43:00,753 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-10-15 19:43:00,753 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-10-15 19:43:00,753 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-10-15 19:43:00,753 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-10-15 19:43:00,753 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-10-15 19:43:00,754 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-10-15 19:43:00,754 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-10-15 19:43:00,754 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-10-15 19:43:00,754 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-10-15 19:43:00,755 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-10-15 19:43:00,755 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-10-15 19:43:00,755 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-10-15 19:43:00,756 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-10-15 19:43:00,756 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-10-15 19:43:00,756 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-10-15 19:43:00,757 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-10-15 19:43:00,757 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-10-15 19:43:00,757 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-10-15 19:43:00,757 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-10-15 19:43:00,758 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-10-15 19:43:00,758 INFO L130 BoogieDeclarations]: Found specification of procedure foo [2021-10-15 19:43:00,758 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-15 19:43:00,758 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-10-15 19:43:00,759 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-15 19:43:00,759 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-15 19:43:00,759 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-15 19:43:00,759 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-10-15 19:43:00,760 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-15 19:43:00,760 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-15 19:43:01,405 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-15 19:43:01,406 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-10-15 19:43:01,408 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:43:01 BoogieIcfgContainer [2021-10-15 19:43:01,409 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-15 19:43:01,411 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-15 19:43:01,412 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-15 19:43:01,417 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-15 19:43:01,424 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 07:42:59" (1/3) ... [2021-10-15 19:43:01,426 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b48935 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 07:43:01, skipping insertion in model container [2021-10-15 19:43:01,426 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:43:00" (2/3) ... [2021-10-15 19:43:01,426 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b48935 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 07:43:01, skipping insertion in model container [2021-10-15 19:43:01,427 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:43:01" (3/3) ... [2021-10-15 19:43:01,429 INFO L111 eAbstractionObserver]: Analyzing ICFG 960521-1_1-1.i [2021-10-15 19:43:01,440 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-15 19:43:01,440 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 21 error locations. [2021-10-15 19:43:01,499 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-15 19:43:01,508 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 [2021-10-15 19:43:01,508 INFO L340 AbstractCegarLoop]: Starting to check reachability of 21 error locations. [2021-10-15 19:43:01,532 INFO L276 IsEmpty]: Start isEmpty. Operand has 62 states, 34 states have (on average 1.8235294117647058) internal successors, (62), 55 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-15 19:43:01,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-15 19:43:01,544 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 19:43:01,544 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:43:01,545 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 16 more)] === [2021-10-15 19:43:01,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:43:01,554 INFO L82 PathProgramCache]: Analyzing trace with hash -2038959101, now seen corresponding path program 1 times [2021-10-15 19:43:01,567 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:43:01,568 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950852676] [2021-10-15 19:43:01,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:43:01,569 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:43:01,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:43:01,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-15 19:43:01,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:43:02,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:43:02,004 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:43:02,004 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950852676] [2021-10-15 19:43:02,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950852676] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:43:02,006 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:43:02,006 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:43:02,017 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279062338] [2021-10-15 19:43:02,024 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:43:02,025 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:43:02,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:43:02,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:43:02,064 INFO L87 Difference]: Start difference. First operand has 62 states, 34 states have (on average 1.8235294117647058) internal successors, (62), 55 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 19:43:02,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 19:43:02,313 INFO L93 Difference]: Finished difference Result 62 states and 65 transitions. [2021-10-15 19:43:02,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:43:02,316 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 9 [2021-10-15 19:43:02,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 19:43:02,327 INFO L225 Difference]: With dead ends: 62 [2021-10-15 19:43:02,327 INFO L226 Difference]: Without dead ends: 59 [2021-10-15 19:43:02,330 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 93.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:43:02,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-10-15 19:43:02,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2021-10-15 19:43:02,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 33 states have (on average 1.7272727272727273) internal successors, (57), 53 states have internal predecessors, (57), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-15 19:43:02,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 62 transitions. [2021-10-15 19:43:02,393 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 62 transitions. Word has length 9 [2021-10-15 19:43:02,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 19:43:02,394 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 62 transitions. [2021-10-15 19:43:02,394 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 19:43:02,395 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 62 transitions. [2021-10-15 19:43:02,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-15 19:43:02,398 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 19:43:02,398 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:43:02,400 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-15 19:43:02,401 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 16 more)] === [2021-10-15 19:43:02,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:43:02,405 INFO L82 PathProgramCache]: Analyzing trace with hash 1216562945, now seen corresponding path program 1 times [2021-10-15 19:43:02,405 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:43:02,406 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531004355] [2021-10-15 19:43:02,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:43:02,406 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:43:02,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:43:02,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-15 19:43:02,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:43:02,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:43:02,714 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:43:02,714 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531004355] [2021-10-15 19:43:02,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531004355] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:43:02,715 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:43:02,715 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-15 19:43:02,715 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442605743] [2021-10-15 19:43:02,717 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-15 19:43:02,717 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:43:02,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-15 19:43:02,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-15 19:43:02,719 INFO L87 Difference]: Start difference. First operand 59 states and 62 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 19:43:03,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 19:43:03,096 INFO L93 Difference]: Finished difference Result 111 states and 117 transitions. [2021-10-15 19:43:03,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-15 19:43:03,097 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2021-10-15 19:43:03,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 19:43:03,104 INFO L225 Difference]: With dead ends: 111 [2021-10-15 19:43:03,105 INFO L226 Difference]: Without dead ends: 111 [2021-10-15 19:43:03,106 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 123.1ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-15 19:43:03,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-10-15 19:43:03,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 63. [2021-10-15 19:43:03,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 37 states have (on average 1.7027027027027026) internal successors, (63), 57 states have internal predecessors, (63), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-15 19:43:03,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 68 transitions. [2021-10-15 19:43:03,126 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 68 transitions. Word has length 10 [2021-10-15 19:43:03,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 19:43:03,126 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 68 transitions. [2021-10-15 19:43:03,127 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 19:43:03,127 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 68 transitions. [2021-10-15 19:43:03,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-15 19:43:03,128 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 19:43:03,128 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:43:03,128 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-15 19:43:03,129 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 16 more)] === [2021-10-15 19:43:03,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:43:03,129 INFO L82 PathProgramCache]: Analyzing trace with hash 1216562944, now seen corresponding path program 1 times [2021-10-15 19:43:03,130 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:43:03,130 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457339977] [2021-10-15 19:43:03,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:43:03,131 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:43:03,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:43:03,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-15 19:43:03,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:43:03,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:43:03,245 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:43:03,245 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457339977] [2021-10-15 19:43:03,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457339977] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:43:03,248 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:43:03,248 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:43:03,248 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530623068] [2021-10-15 19:43:03,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 19:43:03,253 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:43:03,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 19:43:03,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-15 19:43:03,257 INFO L87 Difference]: Start difference. First operand 63 states and 68 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 19:43:03,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 19:43:03,405 INFO L93 Difference]: Finished difference Result 62 states and 66 transitions. [2021-10-15 19:43:03,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 19:43:03,406 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2021-10-15 19:43:03,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 19:43:03,409 INFO L225 Difference]: With dead ends: 62 [2021-10-15 19:43:03,409 INFO L226 Difference]: Without dead ends: 62 [2021-10-15 19:43:03,409 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 43.5ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-15 19:43:03,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-10-15 19:43:03,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2021-10-15 19:43:03,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 37 states have (on average 1.6486486486486487) internal successors, (61), 56 states have internal predecessors, (61), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-15 19:43:03,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 66 transitions. [2021-10-15 19:43:03,432 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 66 transitions. Word has length 10 [2021-10-15 19:43:03,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 19:43:03,433 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 66 transitions. [2021-10-15 19:43:03,433 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 19:43:03,434 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 66 transitions. [2021-10-15 19:43:03,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-15 19:43:03,434 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 19:43:03,435 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:43:03,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-15 19:43:03,436 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 16 more)] === [2021-10-15 19:43:03,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:43:03,449 INFO L82 PathProgramCache]: Analyzing trace with hash 887456838, now seen corresponding path program 1 times [2021-10-15 19:43:03,449 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:43:03,450 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682996317] [2021-10-15 19:43:03,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:43:03,450 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:43:03,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:43:03,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-15 19:43:03,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:43:03,592 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:43:03,592 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:43:03,592 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682996317] [2021-10-15 19:43:03,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682996317] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:43:03,593 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74409783] [2021-10-15 19:43:03,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:43:03,594 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:43:03,594 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_595efb3e-dd63-4783-9af9-d1a03ea59c1a/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:43:03,596 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_595efb3e-dd63-4783-9af9-d1a03ea59c1a/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:43:03,620 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_595efb3e-dd63-4783-9af9-d1a03ea59c1a/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-15 19:43:03,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:43:03,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-15 19:43:03,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:43:03,953 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-10-15 19:43:03,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 18 [2021-10-15 19:43:04,058 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:43:04,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [74409783] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:43:04,059 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:43:04,059 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2021-10-15 19:43:04,060 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826689352] [2021-10-15 19:43:04,060 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-15 19:43:04,060 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:43:04,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-15 19:43:04,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-10-15 19:43:04,063 INFO L87 Difference]: Start difference. First operand 62 states and 66 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 19:43:04,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 19:43:04,243 INFO L93 Difference]: Finished difference Result 108 states and 114 transitions. [2021-10-15 19:43:04,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-15 19:43:04,244 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-10-15 19:43:04,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 19:43:04,246 INFO L225 Difference]: With dead ends: 108 [2021-10-15 19:43:04,246 INFO L226 Difference]: Without dead ends: 108 [2021-10-15 19:43:04,247 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 141.1ms TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-10-15 19:43:04,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-10-15 19:43:04,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 57. [2021-10-15 19:43:04,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 33 states have (on average 1.6666666666666667) internal successors, (55), 51 states have internal predecessors, (55), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-15 19:43:04,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 60 transitions. [2021-10-15 19:43:04,254 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 60 transitions. Word has length 12 [2021-10-15 19:43:04,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 19:43:04,254 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 60 transitions. [2021-10-15 19:43:04,255 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 19:43:04,255 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 60 transitions. [2021-10-15 19:43:04,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-15 19:43:04,256 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 19:43:04,256 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:43:04,304 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_595efb3e-dd63-4783-9af9-d1a03ea59c1a/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-15 19:43:04,456 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_595efb3e-dd63-4783-9af9-d1a03ea59c1a/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:43:04,457 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting fooErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 16 more)] === [2021-10-15 19:43:04,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:43:04,458 INFO L82 PathProgramCache]: Analyzing trace with hash -1178486182, now seen corresponding path program 1 times [2021-10-15 19:43:04,458 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:43:04,458 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380570874] [2021-10-15 19:43:04,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:43:04,459 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:43:04,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:43:04,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-15 19:43:04,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:43:04,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:43:04,618 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:43:04,618 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380570874] [2021-10-15 19:43:04,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380570874] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:43:04,619 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:43:04,619 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-15 19:43:04,619 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045250283] [2021-10-15 19:43:04,620 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-15 19:43:04,620 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:43:04,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-15 19:43:04,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-15 19:43:04,621 INFO L87 Difference]: Start difference. First operand 57 states and 60 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 19:43:04,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 19:43:04,818 INFO L93 Difference]: Finished difference Result 54 states and 57 transitions. [2021-10-15 19:43:04,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-15 19:43:04,821 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-10-15 19:43:04,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 19:43:04,823 INFO L225 Difference]: With dead ends: 54 [2021-10-15 19:43:04,824 INFO L226 Difference]: Without dead ends: 54 [2021-10-15 19:43:04,824 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 109.3ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-10-15 19:43:04,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-10-15 19:43:04,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2021-10-15 19:43:04,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 48 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-15 19:43:04,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 57 transitions. [2021-10-15 19:43:04,832 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 57 transitions. Word has length 15 [2021-10-15 19:43:04,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 19:43:04,832 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 57 transitions. [2021-10-15 19:43:04,832 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 19:43:04,833 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 57 transitions. [2021-10-15 19:43:04,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-15 19:43:04,833 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 19:43:04,833 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:43:04,834 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-15 19:43:04,834 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting fooErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 16 more)] === [2021-10-15 19:43:04,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:43:04,839 INFO L82 PathProgramCache]: Analyzing trace with hash -1178486181, now seen corresponding path program 1 times [2021-10-15 19:43:04,839 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:43:04,840 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904606081] [2021-10-15 19:43:04,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:43:04,840 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:43:04,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:43:05,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-15 19:43:05,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:43:05,059 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:43:05,059 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:43:05,059 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904606081] [2021-10-15 19:43:05,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904606081] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:43:05,060 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:43:05,060 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-15 19:43:05,062 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671378416] [2021-10-15 19:43:05,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-15 19:43:05,067 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:43:05,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-15 19:43:05,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-15 19:43:05,068 INFO L87 Difference]: Start difference. First operand 54 states and 57 transitions. Second operand has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 19:43:05,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 19:43:05,479 INFO L93 Difference]: Finished difference Result 98 states and 103 transitions. [2021-10-15 19:43:05,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-15 19:43:05,479 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-10-15 19:43:05,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 19:43:05,481 INFO L225 Difference]: With dead ends: 98 [2021-10-15 19:43:05,481 INFO L226 Difference]: Without dead ends: 98 [2021-10-15 19:43:05,481 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 188.3ms TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-10-15 19:43:05,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-10-15 19:43:05,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 74. [2021-10-15 19:43:05,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 51 states have (on average 1.4901960784313726) internal successors, (76), 66 states have internal predecessors, (76), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-15 19:43:05,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 83 transitions. [2021-10-15 19:43:05,495 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 83 transitions. Word has length 15 [2021-10-15 19:43:05,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 19:43:05,496 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 83 transitions. [2021-10-15 19:43:05,497 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 19:43:05,497 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 83 transitions. [2021-10-15 19:43:05,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-15 19:43:05,498 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 19:43:05,499 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:43:05,499 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-15 19:43:05,499 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting fooErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 16 more)] === [2021-10-15 19:43:05,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:43:05,500 INFO L82 PathProgramCache]: Analyzing trace with hash -939786186, now seen corresponding path program 1 times [2021-10-15 19:43:05,500 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:43:05,500 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401355473] [2021-10-15 19:43:05,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:43:05,501 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:43:05,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:43:05,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-15 19:43:05,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:43:05,753 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:43:05,753 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:43:05,754 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401355473] [2021-10-15 19:43:05,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401355473] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:43:05,754 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370051070] [2021-10-15 19:43:05,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:43:05,754 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:43:05,755 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_595efb3e-dd63-4783-9af9-d1a03ea59c1a/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:43:05,756 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_595efb3e-dd63-4783-9af9-d1a03ea59c1a/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:43:05,776 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_595efb3e-dd63-4783-9af9-d1a03ea59c1a/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-15 19:43:05,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:43:05,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-15 19:43:05,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:43:06,032 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-10-15 19:43:06,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 18 [2021-10-15 19:43:06,290 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:43:06,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1370051070] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:43:06,291 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:43:06,291 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2021-10-15 19:43:06,292 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857662910] [2021-10-15 19:43:06,293 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-15 19:43:06,293 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:43:06,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-15 19:43:06,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-10-15 19:43:06,294 INFO L87 Difference]: Start difference. First operand 74 states and 83 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 19:43:06,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 19:43:06,534 INFO L93 Difference]: Finished difference Result 104 states and 109 transitions. [2021-10-15 19:43:06,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-15 19:43:06,535 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-10-15 19:43:06,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 19:43:06,537 INFO L225 Difference]: With dead ends: 104 [2021-10-15 19:43:06,537 INFO L226 Difference]: Without dead ends: 104 [2021-10-15 19:43:06,538 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 212.7ms TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-10-15 19:43:06,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-10-15 19:43:06,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 71. [2021-10-15 19:43:06,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 50 states have (on average 1.4) internal successors, (70), 64 states have internal predecessors, (70), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-15 19:43:06,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 77 transitions. [2021-10-15 19:43:06,550 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 77 transitions. Word has length 17 [2021-10-15 19:43:06,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 19:43:06,551 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 77 transitions. [2021-10-15 19:43:06,551 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 19:43:06,552 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 77 transitions. [2021-10-15 19:43:06,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-15 19:43:06,553 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 19:43:06,553 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:43:06,606 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_595efb3e-dd63-4783-9af9-d1a03ea59c1a/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-15 19:43:06,753 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_595efb3e-dd63-4783-9af9-d1a03ea59c1a/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:43:06,754 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting fooErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 16 more)] === [2021-10-15 19:43:06,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:43:06,755 INFO L82 PathProgramCache]: Analyzing trace with hash -1219116994, now seen corresponding path program 1 times [2021-10-15 19:43:06,755 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:43:06,755 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679615245] [2021-10-15 19:43:06,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:43:06,755 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:43:06,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:43:06,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-15 19:43:06,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:43:06,874 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:43:06,874 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:43:06,874 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679615245] [2021-10-15 19:43:06,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679615245] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:43:06,875 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467611018] [2021-10-15 19:43:06,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:43:06,875 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:43:06,875 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_595efb3e-dd63-4783-9af9-d1a03ea59c1a/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:43:06,876 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_595efb3e-dd63-4783-9af9-d1a03ea59c1a/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:43:06,900 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_595efb3e-dd63-4783-9af9-d1a03ea59c1a/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-15 19:43:07,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:43:07,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-15 19:43:07,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:43:07,164 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:43:07,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [467611018] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:43:07,165 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:43:07,165 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2021-10-15 19:43:07,165 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408508036] [2021-10-15 19:43:07,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-15 19:43:07,166 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:43:07,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-15 19:43:07,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-10-15 19:43:07,167 INFO L87 Difference]: Start difference. First operand 71 states and 77 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 19:43:07,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 19:43:07,209 INFO L93 Difference]: Finished difference Result 97 states and 101 transitions. [2021-10-15 19:43:07,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-15 19:43:07,210 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2021-10-15 19:43:07,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 19:43:07,211 INFO L225 Difference]: With dead ends: 97 [2021-10-15 19:43:07,211 INFO L226 Difference]: Without dead ends: 97 [2021-10-15 19:43:07,212 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 68.6ms TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-10-15 19:43:07,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-10-15 19:43:07,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 70. [2021-10-15 19:43:07,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 49 states have (on average 1.3673469387755102) internal successors, (67), 63 states have internal predecessors, (67), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-15 19:43:07,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 74 transitions. [2021-10-15 19:43:07,218 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 74 transitions. Word has length 18 [2021-10-15 19:43:07,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 19:43:07,219 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 74 transitions. [2021-10-15 19:43:07,219 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 19:43:07,219 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 74 transitions. [2021-10-15 19:43:07,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-15 19:43:07,220 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 19:43:07,220 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:43:07,264 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_595efb3e-dd63-4783-9af9-d1a03ea59c1a/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-15 19:43:07,444 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_595efb3e-dd63-4783-9af9-d1a03ea59c1a/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:43:07,445 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting fooErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 16 more)] === [2021-10-15 19:43:07,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:43:07,445 INFO L82 PathProgramCache]: Analyzing trace with hash 1721559171, now seen corresponding path program 1 times [2021-10-15 19:43:07,446 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:43:07,446 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411812275] [2021-10-15 19:43:07,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:43:07,446 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:43:07,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:43:07,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-15 19:43:07,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:43:07,607 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:43:07,607 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:43:07,607 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411812275] [2021-10-15 19:43:07,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411812275] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:43:07,608 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808770499] [2021-10-15 19:43:07,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:43:07,608 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:43:07,608 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_595efb3e-dd63-4783-9af9-d1a03ea59c1a/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:43:07,609 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_595efb3e-dd63-4783-9af9-d1a03ea59c1a/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:43:07,632 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_595efb3e-dd63-4783-9af9-d1a03ea59c1a/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-15 19:43:07,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:43:07,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-15 19:43:07,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:43:07,862 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-10-15 19:43:07,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 18 [2021-10-15 19:43:08,148 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:43:08,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [808770499] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:43:08,149 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 19:43:08,149 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 12 [2021-10-15 19:43:08,149 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050781272] [2021-10-15 19:43:08,150 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-15 19:43:08,150 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:43:08,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-15 19:43:08,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-10-15 19:43:08,151 INFO L87 Difference]: Start difference. First operand 70 states and 74 transitions. Second operand has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 19:43:09,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 19:43:09,059 INFO L93 Difference]: Finished difference Result 112 states and 117 transitions. [2021-10-15 19:43:09,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-15 19:43:09,060 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2021-10-15 19:43:09,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 19:43:09,064 INFO L225 Difference]: With dead ends: 112 [2021-10-15 19:43:09,064 INFO L226 Difference]: Without dead ends: 112 [2021-10-15 19:43:09,065 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 458.9ms TimeCoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2021-10-15 19:43:09,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-10-15 19:43:09,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 73. [2021-10-15 19:43:09,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 52 states have (on average 1.3461538461538463) internal successors, (70), 66 states have internal predecessors, (70), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-15 19:43:09,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 77 transitions. [2021-10-15 19:43:09,072 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 77 transitions. Word has length 20 [2021-10-15 19:43:09,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 19:43:09,072 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 77 transitions. [2021-10-15 19:43:09,072 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 19:43:09,073 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 77 transitions. [2021-10-15 19:43:09,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-15 19:43:09,074 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 19:43:09,074 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:43:09,110 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_595efb3e-dd63-4783-9af9-d1a03ea59c1a/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-10-15 19:43:09,288 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_595efb3e-dd63-4783-9af9-d1a03ea59c1a/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:43:09,289 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr2REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 16 more)] === [2021-10-15 19:43:09,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:43:09,289 INFO L82 PathProgramCache]: Analyzing trace with hash -1762222077, now seen corresponding path program 1 times [2021-10-15 19:43:09,289 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:43:09,290 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523761617] [2021-10-15 19:43:09,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:43:09,290 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:43:09,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:43:09,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-15 19:43:09,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:43:09,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-15 19:43:09,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:43:09,400 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-15 19:43:09,400 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:43:09,401 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523761617] [2021-10-15 19:43:09,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523761617] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:43:09,401 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:43:09,401 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-15 19:43:09,401 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998194077] [2021-10-15 19:43:09,402 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-15 19:43:09,402 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:43:09,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-15 19:43:09,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-15 19:43:09,403 INFO L87 Difference]: Start difference. First operand 73 states and 77 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-15 19:43:09,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 19:43:09,699 INFO L93 Difference]: Finished difference Result 71 states and 75 transitions. [2021-10-15 19:43:09,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-15 19:43:09,700 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 22 [2021-10-15 19:43:09,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 19:43:09,701 INFO L225 Difference]: With dead ends: 71 [2021-10-15 19:43:09,701 INFO L226 Difference]: Without dead ends: 71 [2021-10-15 19:43:09,702 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 167.7ms TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-10-15 19:43:09,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-10-15 19:43:09,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2021-10-15 19:43:09,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 52 states have (on average 1.3076923076923077) internal successors, (68), 64 states have internal predecessors, (68), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-15 19:43:09,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 75 transitions. [2021-10-15 19:43:09,707 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 75 transitions. Word has length 22 [2021-10-15 19:43:09,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 19:43:09,708 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 75 transitions. [2021-10-15 19:43:09,708 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-15 19:43:09,708 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 75 transitions. [2021-10-15 19:43:09,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-15 19:43:09,709 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 19:43:09,709 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:43:09,709 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-10-15 19:43:09,709 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 16 more)] === [2021-10-15 19:43:09,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:43:09,710 INFO L82 PathProgramCache]: Analyzing trace with hash -1762222076, now seen corresponding path program 1 times [2021-10-15 19:43:09,710 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:43:09,710 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87000783] [2021-10-15 19:43:09,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:43:09,711 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:43:09,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-15 19:43:09,730 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-15 19:43:09,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-15 19:43:09,770 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-15 19:43:09,771 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-15 19:43:09,772 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location mainErr3REQUIRES_VIOLATION [2021-10-15 19:43:09,774 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr0REQUIRES_VIOLATION [2021-10-15 19:43:09,775 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr1REQUIRES_VIOLATION [2021-10-15 19:43:09,775 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr2REQUIRES_VIOLATION [2021-10-15 19:43:09,775 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr4ASSERT_VIOLATIONMEMORY_FREE [2021-10-15 19:43:09,775 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr5ASSERT_VIOLATIONMEMORY_FREE [2021-10-15 19:43:09,776 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr6ASSERT_VIOLATIONMEMORY_FREE [2021-10-15 19:43:09,776 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr7ASSERT_VIOLATIONMEMORY_FREE [2021-10-15 19:43:09,776 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr8ASSERT_VIOLATIONMEMORY_FREE [2021-10-15 19:43:09,776 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr9ASSERT_VIOLATIONMEMORY_FREE [2021-10-15 19:43:09,777 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr10ASSERT_VIOLATIONMEMORY_FREE [2021-10-15 19:43:09,777 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr11ASSERT_VIOLATIONMEMORY_FREE [2021-10-15 19:43:09,777 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr12ASSERT_VIOLATIONMEMORY_FREE [2021-10-15 19:43:09,777 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr13ASSERT_VIOLATIONMEMORY_FREE [2021-10-15 19:43:09,778 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr14ASSERT_VIOLATIONMEMORY_FREE [2021-10-15 19:43:09,778 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr15ASSERT_VIOLATIONMEMORY_FREE [2021-10-15 19:43:09,778 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr16ENSURES_VIOLATIONMEMORY_LEAK [2021-10-15 19:43:09,778 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location fooErr0REQUIRES_VIOLATION [2021-10-15 19:43:09,778 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location fooErr1REQUIRES_VIOLATION [2021-10-15 19:43:09,779 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location fooErr2REQUIRES_VIOLATION [2021-10-15 19:43:09,779 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location fooErr3REQUIRES_VIOLATION [2021-10-15 19:43:09,779 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-10-15 19:43:09,787 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-15 19:43:09,826 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.10 07:43:09 BoogieIcfgContainer [2021-10-15 19:43:09,826 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-15 19:43:09,827 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-15 19:43:09,827 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-15 19:43:09,827 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-15 19:43:09,828 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:43:01" (3/4) ... [2021-10-15 19:43:09,830 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-15 19:43:09,884 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_595efb3e-dd63-4783-9af9-d1a03ea59c1a/bin/uautomizer-hJ6jxDFKc3/witness.graphml [2021-10-15 19:43:09,884 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-15 19:43:09,886 INFO L168 Benchmark]: Toolchain (without parser) took 10134.34 ms. Allocated memory was 115.3 MB in the beginning and 146.8 MB in the end (delta: 31.5 MB). Free memory was 76.5 MB in the beginning and 48.9 MB in the end (delta: 27.6 MB). Peak memory consumption was 57.4 MB. Max. memory is 16.1 GB. [2021-10-15 19:43:09,886 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 115.3 MB. Free memory is still 94.1 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 19:43:09,887 INFO L168 Benchmark]: CACSL2BoogieTranslator took 716.07 ms. Allocated memory is still 115.3 MB. Free memory was 76.4 MB in the beginning and 83.3 MB in the end (delta: -6.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-15 19:43:09,887 INFO L168 Benchmark]: Boogie Preprocessor took 133.55 ms. Allocated memory is still 115.3 MB. Free memory was 83.3 MB in the beginning and 80.6 MB in the end (delta: 2.7 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-15 19:43:09,888 INFO L168 Benchmark]: RCFGBuilder took 803.78 ms. Allocated memory is still 115.3 MB. Free memory was 80.6 MB in the beginning and 60.2 MB in the end (delta: 20.4 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. [2021-10-15 19:43:09,889 INFO L168 Benchmark]: TraceAbstraction took 8415.01 ms. Allocated memory was 115.3 MB in the beginning and 146.8 MB in the end (delta: 31.5 MB). Free memory was 59.6 MB in the beginning and 51.0 MB in the end (delta: 8.6 MB). Peak memory consumption was 40.6 MB. Max. memory is 16.1 GB. [2021-10-15 19:43:09,889 INFO L168 Benchmark]: Witness Printer took 57.78 ms. Allocated memory is still 146.8 MB. Free memory was 51.0 MB in the beginning and 48.9 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-15 19:43:09,894 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30 ms. Allocated memory is still 115.3 MB. Free memory is still 94.1 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 716.07 ms. Allocated memory is still 115.3 MB. Free memory was 76.4 MB in the beginning and 83.3 MB in the end (delta: -6.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 133.55 ms. Allocated memory is still 115.3 MB. Free memory was 83.3 MB in the beginning and 80.6 MB in the end (delta: 2.7 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * RCFGBuilder took 803.78 ms. Allocated memory is still 115.3 MB. Free memory was 80.6 MB in the beginning and 60.2 MB in the end (delta: 20.4 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. * TraceAbstraction took 8415.01 ms. Allocated memory was 115.3 MB in the beginning and 146.8 MB in the end (delta: 31.5 MB). Free memory was 59.6 MB in the beginning and 51.0 MB in the end (delta: 8.6 MB). Peak memory consumption was 40.6 MB. Max. memory is 16.1 GB. * Witness Printer took 57.78 ms. Allocated memory is still 146.8 MB. Free memory was 51.0 MB in the beginning and 48.9 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 544]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L523] int *a, *b; [L524] int n; VAL [\old(a)=52, \old(a)=57, \old(b)=54, \old(b)=55, \old(n)=50, a={0:0}, b={0:0}, n=0] [L536] n = 1 VAL [\old(a)=0, \old(a)=0, \old(b)=0, \old(b)=0, \old(n)=0, a={0:0}, b={0:0}, n=1] [L537] COND FALSE !(__VERIFIER_nondet_int() && n < 30) [L540] a = malloc(n * sizeof(*a)) [L541] b = malloc(n * sizeof(*b)) [L542] EXPR b++ VAL [\old(a)=0, \old(a)=0, \old(b)=0, \old(b)=0, \old(n)=0, a={-2:0}, b={-1:4}, b++={-1:0}, n=1] [L542] *b++ = 0 VAL [\old(a)=0, \old(a)=0, \old(b)=0, \old(b)=0, \old(n)=0, a={-2:0}, b={-1:4}, b++={-1:0}, n=1] [L543] CALL foo() VAL [\old(a)=0, \old(a)=0, \old(b)=0, \old(b)=0, \old(n)=0, a={-2:0}, b={-1:4}, n=1] [L528] int i; [L529] i = 0 VAL [\old(a)=0, \old(a)=0, \old(b)=0, \old(b)=0, \old(n)=0, a={-2:0}, b={-1:4}, i=0, n=1] [L529] COND TRUE i < n VAL [\old(a)=0, \old(a)=0, \old(b)=0, \old(b)=0, \old(n)=0, a={-2:0}, b={-1:4}, i=0, n=1] [L530] a[i] = n VAL [\old(a)=0, \old(a)=0, \old(b)=0, \old(b)=0, \old(n)=0, a={-2:0}, b={-1:4}, i=0, n=1] [L529] i++ VAL [\old(a)=0, \old(a)=0, \old(b)=0, \old(b)=0, \old(n)=0, a={-2:0}, b={-1:4}, i=1, n=1] [L529] COND FALSE !(i < n) VAL [\old(a)=0, \old(a)=0, \old(b)=0, \old(b)=0, \old(n)=0, a={-2:0}, b={-1:4}, i=1, n=1] [L531] i = 0 VAL [\old(a)=0, \old(a)=0, \old(b)=0, \old(b)=0, \old(n)=0, a={-2:0}, b={-1:4}, i=0, n=1] [L531] COND FALSE !(i < n - 1) VAL [\old(a)=0, \old(a)=0, \old(b)=0, \old(b)=0, \old(n)=0, a={-2:0}, b={-1:4}, i=0, n=1] [L543] RET foo() VAL [\old(a)=0, \old(a)=0, \old(b)=0, \old(b)=0, \old(n)=0, a={-2:0}, b={-1:4}, n=1] [L544] b[-2] - UnprovableResult [Line: 542]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 542]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 544]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 545]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 545]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 545]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 545]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 545]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 545]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 547]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 547]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 547]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 547]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 547]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 547]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 534]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: 530]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 530]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 532]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 532]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 10 procedures, 80 locations, 21 error locations. Started 1 CEGAR loops. OverallTime: 8287.9ms, OverallIterations: 11, TraceHistogramMax: 2, EmptinessCheckTime: 29.4ms, AutomataDifference: 3157.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 17.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 558 SDtfs, 748 SDslu, 897 SDs, 0 SdLazy, 1277 SolverSat, 80 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1747.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 145 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 1606.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=74occurred in iteration=6, InterpolantAutomatonStates: 61, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 144.3ms AutomataMinimizationTime, 10 MinimizatonAttempts, 222 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 85.5ms SsaConstructionTime, 391.1ms SatisfiabilityAnalysisTime, 2682.9ms InterpolantComputationTime, 237 NumberOfCodeBlocks, 237 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 201 ConstructedInterpolants, 0 QuantifiedInterpolants, 1455 SizeOfPredicates, 8 NumberOfNonLiveVariables, 618 ConjunctsInSsa, 28 ConjunctsInUnsatCore, 14 InterpolantComputations, 9 PerfectInterpolantSequences, 10/21 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-10-15 19:43:09,945 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_595efb3e-dd63-4783-9af9-d1a03ea59c1a/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...