./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-ext-properties/960521-1_1-3.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_4bbbc7ec-072b-4071-baf6-f7b5032a0e93/bin/uautomizer-hJ6jxDFKc3/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bbbc7ec-072b-4071-baf6-f7b5032a0e93/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_4bbbc7ec-072b-4071-baf6-f7b5032a0e93/bin/uautomizer-hJ6jxDFKc3/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bbbc7ec-072b-4071-baf6-f7b5032a0e93/bin/uautomizer-hJ6jxDFKc3/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-ext-properties/960521-1_1-3.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bbbc7ec-072b-4071-baf6-f7b5032a0e93/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_4bbbc7ec-072b-4071-baf6-f7b5032a0e93/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 cbc7a588e1092d0916f2339b4d4b9e0fa8415335 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(valid-free) --- Real Ultimate output --- This is Ultimate 0.2.1-dev-5709675 [2021-10-15 19:09:20,271 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-15 19:09:20,274 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-15 19:09:20,337 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-15 19:09:20,338 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-15 19:09:20,339 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-15 19:09:20,342 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-15 19:09:20,345 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-15 19:09:20,347 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-15 19:09:20,349 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-15 19:09:20,350 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-15 19:09:20,352 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-15 19:09:20,353 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-15 19:09:20,354 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-15 19:09:20,356 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-15 19:09:20,358 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-15 19:09:20,360 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-15 19:09:20,361 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-15 19:09:20,364 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-15 19:09:20,367 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-15 19:09:20,370 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-15 19:09:20,372 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-15 19:09:20,374 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-15 19:09:20,376 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-15 19:09:20,380 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-15 19:09:20,381 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-15 19:09:20,382 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-15 19:09:20,383 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-15 19:09:20,384 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-15 19:09:20,385 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-15 19:09:20,386 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-15 19:09:20,387 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-15 19:09:20,388 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-15 19:09:20,389 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-15 19:09:20,391 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-15 19:09:20,392 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-15 19:09:20,393 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-15 19:09:20,393 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-15 19:09:20,394 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-15 19:09:20,395 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-15 19:09:20,397 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-15 19:09:20,398 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bbbc7ec-072b-4071-baf6-f7b5032a0e93/bin/uautomizer-hJ6jxDFKc3/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-10-15 19:09:20,427 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-15 19:09:20,428 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-15 19:09:20,429 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-15 19:09:20,429 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-15 19:09:20,431 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-15 19:09:20,431 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-15 19:09:20,432 INFO L138 SettingsManager]: * Use SBE=true [2021-10-15 19:09:20,433 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-15 19:09:20,433 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-15 19:09:20,434 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-15 19:09:20,434 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-15 19:09:20,435 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-15 19:09:20,435 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-15 19:09:20,436 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-15 19:09:20,436 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-15 19:09:20,436 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-15 19:09:20,437 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-15 19:09:20,437 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-15 19:09:20,437 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-15 19:09:20,438 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-15 19:09:20,438 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-15 19:09:20,438 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-15 19:09:20,439 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-15 19:09:20,439 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 19:09:20,439 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-15 19:09:20,440 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-15 19:09:20,440 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-15 19:09:20,440 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-15 19:09:20,440 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-15 19:09:20,441 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_4bbbc7ec-072b-4071-baf6-f7b5032a0e93/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bbbc7ec-072b-4071-baf6-f7b5032a0e93/bin/uautomizer-hJ6jxDFKc3 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cbc7a588e1092d0916f2339b4d4b9e0fa8415335 [2021-10-15 19:09:20,802 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-15 19:09:20,834 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-15 19:09:20,839 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-15 19:09:20,841 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-15 19:09:20,844 INFO L275 PluginConnector]: CDTParser initialized [2021-10-15 19:09:20,845 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bbbc7ec-072b-4071-baf6-f7b5032a0e93/bin/uautomizer-hJ6jxDFKc3/../../sv-benchmarks/c/list-ext-properties/960521-1_1-3.i [2021-10-15 19:09:20,943 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bbbc7ec-072b-4071-baf6-f7b5032a0e93/bin/uautomizer-hJ6jxDFKc3/data/58b2fdc82/7f03205c80f24e299e486a0570e15501/FLAGc5d67f261 [2021-10-15 19:09:21,582 INFO L306 CDTParser]: Found 1 translation units. [2021-10-15 19:09:21,583 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bbbc7ec-072b-4071-baf6-f7b5032a0e93/sv-benchmarks/c/list-ext-properties/960521-1_1-3.i [2021-10-15 19:09:21,599 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bbbc7ec-072b-4071-baf6-f7b5032a0e93/bin/uautomizer-hJ6jxDFKc3/data/58b2fdc82/7f03205c80f24e299e486a0570e15501/FLAGc5d67f261 [2021-10-15 19:09:21,831 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bbbc7ec-072b-4071-baf6-f7b5032a0e93/bin/uautomizer-hJ6jxDFKc3/data/58b2fdc82/7f03205c80f24e299e486a0570e15501 [2021-10-15 19:09:21,836 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-15 19:09:21,838 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-15 19:09:21,840 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-15 19:09:21,840 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-15 19:09:21,865 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-15 19:09:21,865 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 07:09:21" (1/1) ... [2021-10-15 19:09:21,866 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4bd588e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:09:21, skipping insertion in model container [2021-10-15 19:09:21,866 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 07:09:21" (1/1) ... [2021-10-15 19:09:21,874 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-15 19:09:21,928 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-15 19:09:22,323 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 19:09:22,335 INFO L203 MainTranslator]: Completed pre-run [2021-10-15 19:09:22,416 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 19:09:22,460 INFO L208 MainTranslator]: Completed translation [2021-10-15 19:09:22,460 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:09:22 WrapperNode [2021-10-15 19:09:22,461 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-15 19:09:22,462 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-15 19:09:22,462 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-15 19:09:22,463 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-15 19:09:22,478 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:09:22" (1/1) ... [2021-10-15 19:09:22,480 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:09:22" (1/1) ... [2021-10-15 19:09:22,504 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:09:22" (1/1) ... [2021-10-15 19:09:22,505 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:09:22" (1/1) ... [2021-10-15 19:09:22,524 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:09:22" (1/1) ... [2021-10-15 19:09:22,529 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:09:22" (1/1) ... [2021-10-15 19:09:22,533 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:09:22" (1/1) ... [2021-10-15 19:09:22,541 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-15 19:09:22,542 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-15 19:09:22,542 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-15 19:09:22,543 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-15 19:09:22,553 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:09:22" (1/1) ... [2021-10-15 19:09:22,568 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 19:09:22,585 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bbbc7ec-072b-4071-baf6-f7b5032a0e93/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:09:22,599 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bbbc7ec-072b-4071-baf6-f7b5032a0e93/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-15 19:09:22,602 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bbbc7ec-072b-4071-baf6-f7b5032a0e93/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-15 19:09:22,647 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-10-15 19:09:22,648 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-15 19:09:22,648 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-10-15 19:09:22,648 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-10-15 19:09:22,648 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-10-15 19:09:22,649 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2021-10-15 19:09:22,649 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2021-10-15 19:09:22,650 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2021-10-15 19:09:22,650 INFO L138 BoogieDeclarations]: Found implementation of procedure foo [2021-10-15 19:09:22,650 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-10-15 19:09:22,651 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-10-15 19:09:22,652 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-10-15 19:09:22,652 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-10-15 19:09:22,652 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-10-15 19:09:22,652 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-10-15 19:09:22,653 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-15 19:09:22,653 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-10-15 19:09:22,653 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-10-15 19:09:22,653 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-10-15 19:09:22,653 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-10-15 19:09:22,654 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-10-15 19:09:22,654 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-10-15 19:09:22,654 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-10-15 19:09:22,654 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-10-15 19:09:22,655 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-10-15 19:09:22,655 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-10-15 19:09:22,655 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-10-15 19:09:22,655 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-10-15 19:09:22,655 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-10-15 19:09:22,656 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-10-15 19:09:22,656 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-10-15 19:09:22,656 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-10-15 19:09:22,657 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-10-15 19:09:22,657 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-10-15 19:09:22,657 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2021-10-15 19:09:22,657 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2021-10-15 19:09:22,657 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2021-10-15 19:09:22,658 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-10-15 19:09:22,658 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-10-15 19:09:22,658 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-10-15 19:09:22,658 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-10-15 19:09:22,659 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-10-15 19:09:22,659 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-10-15 19:09:22,659 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-10-15 19:09:22,659 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-10-15 19:09:22,659 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-10-15 19:09:22,660 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-10-15 19:09:22,660 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-10-15 19:09:22,660 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-10-15 19:09:22,661 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-10-15 19:09:22,661 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-10-15 19:09:22,662 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-10-15 19:09:22,662 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-10-15 19:09:22,663 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-10-15 19:09:22,663 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-10-15 19:09:22,663 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-10-15 19:09:22,664 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-10-15 19:09:22,664 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-10-15 19:09:22,664 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-10-15 19:09:22,664 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-10-15 19:09:22,665 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-10-15 19:09:22,665 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-10-15 19:09:22,665 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-10-15 19:09:22,665 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-10-15 19:09:22,665 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-10-15 19:09:22,666 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-10-15 19:09:22,666 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-10-15 19:09:22,666 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-10-15 19:09:22,668 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-10-15 19:09:22,669 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-10-15 19:09:22,669 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-10-15 19:09:22,670 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-10-15 19:09:22,670 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-10-15 19:09:22,670 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-10-15 19:09:22,670 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-10-15 19:09:22,671 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-10-15 19:09:22,671 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-10-15 19:09:22,671 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-10-15 19:09:22,671 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-10-15 19:09:22,671 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-10-15 19:09:22,672 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-10-15 19:09:22,673 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-10-15 19:09:22,673 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-10-15 19:09:22,673 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-10-15 19:09:22,673 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-10-15 19:09:22,674 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-10-15 19:09:22,674 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-10-15 19:09:22,674 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-10-15 19:09:22,674 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-10-15 19:09:22,674 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-10-15 19:09:22,675 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-10-15 19:09:22,675 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-10-15 19:09:22,675 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-10-15 19:09:22,675 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-10-15 19:09:22,675 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-10-15 19:09:22,676 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-10-15 19:09:22,676 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-10-15 19:09:22,676 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-10-15 19:09:22,676 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-10-15 19:09:22,676 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-10-15 19:09:22,677 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-10-15 19:09:22,677 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-10-15 19:09:22,677 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-10-15 19:09:22,677 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-10-15 19:09:22,677 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-10-15 19:09:22,677 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-10-15 19:09:22,678 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-10-15 19:09:22,678 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-10-15 19:09:22,679 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-10-15 19:09:22,679 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-10-15 19:09:22,679 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-10-15 19:09:22,679 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-10-15 19:09:22,680 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-10-15 19:09:22,681 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-10-15 19:09:22,681 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-10-15 19:09:22,681 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-10-15 19:09:22,681 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-10-15 19:09:22,682 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-10-15 19:09:22,682 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-10-15 19:09:22,682 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-10-15 19:09:22,682 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-10-15 19:09:22,682 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-10-15 19:09:22,683 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-10-15 19:09:22,683 INFO L130 BoogieDeclarations]: Found specification of procedure foo [2021-10-15 19:09:22,683 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-15 19:09:22,684 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-10-15 19:09:22,684 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-15 19:09:22,684 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-15 19:09:22,685 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-15 19:09:22,686 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-10-15 19:09:22,689 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-15 19:09:22,690 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-15 19:09:23,322 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-15 19:09:23,322 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-10-15 19:09:23,324 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:09:23 BoogieIcfgContainer [2021-10-15 19:09:23,324 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-15 19:09:23,326 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-15 19:09:23,327 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-15 19:09:23,331 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-15 19:09:23,331 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 07:09:21" (1/3) ... [2021-10-15 19:09:23,332 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1da301e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 07:09:23, skipping insertion in model container [2021-10-15 19:09:23,332 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:09:22" (2/3) ... [2021-10-15 19:09:23,333 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1da301e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 07:09:23, skipping insertion in model container [2021-10-15 19:09:23,333 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:09:23" (3/3) ... [2021-10-15 19:09:23,334 INFO L111 eAbstractionObserver]: Analyzing ICFG 960521-1_1-3.i [2021-10-15 19:09:23,365 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-15 19:09:23,365 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 21 error locations. [2021-10-15 19:09:23,458 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-15 19:09:23,466 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 19:09:23,466 INFO L340 AbstractCegarLoop]: Starting to check reachability of 21 error locations. [2021-10-15 19:09:23,485 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 19:09:23,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-15 19:09:23,494 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 19:09:23,494 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:09:23,495 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 19:09:23,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:09:23,502 INFO L82 PathProgramCache]: Analyzing trace with hash -2038959101, now seen corresponding path program 1 times [2021-10-15 19:09:23,513 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:09:23,513 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940270136] [2021-10-15 19:09:23,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:09:23,515 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:09:23,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:09:23,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-15 19:09:23,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:09:23,897 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 19:09:23,898 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:09:23,898 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940270136] [2021-10-15 19:09:23,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940270136] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:09:23,899 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:09:23,900 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:09:23,911 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080331354] [2021-10-15 19:09:23,929 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:09:23,933 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:09:23,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:09:23,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:09:23,949 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 19:09:24,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 19:09:24,145 INFO L93 Difference]: Finished difference Result 62 states and 65 transitions. [2021-10-15 19:09:24,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:09:24,147 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 19:09:24,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 19:09:24,159 INFO L225 Difference]: With dead ends: 62 [2021-10-15 19:09:24,159 INFO L226 Difference]: Without dead ends: 59 [2021-10-15 19:09:24,162 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 52.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:09:24,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-10-15 19:09:24,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2021-10-15 19:09:24,208 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 19:09:24,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 62 transitions. [2021-10-15 19:09:24,214 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 62 transitions. Word has length 9 [2021-10-15 19:09:24,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 19:09:24,215 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 62 transitions. [2021-10-15 19:09:24,215 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 19:09:24,216 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 62 transitions. [2021-10-15 19:09:24,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-15 19:09:24,218 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 19:09:24,218 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:09:24,219 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-15 19:09:24,219 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 19:09:24,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:09:24,220 INFO L82 PathProgramCache]: Analyzing trace with hash 1216562945, now seen corresponding path program 1 times [2021-10-15 19:09:24,221 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:09:24,221 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103363831] [2021-10-15 19:09:24,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:09:24,222 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:09:24,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:09:24,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-15 19:09:24,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:09:24,433 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 19:09:24,433 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:09:24,433 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103363831] [2021-10-15 19:09:24,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103363831] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:09:24,434 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:09:24,434 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-15 19:09:24,434 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223928174] [2021-10-15 19:09:24,436 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-15 19:09:24,437 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:09:24,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-15 19:09:24,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-15 19:09:24,443 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 19:09:24,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 19:09:24,758 INFO L93 Difference]: Finished difference Result 111 states and 117 transitions. [2021-10-15 19:09:24,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-15 19:09:24,758 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 19:09:24,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 19:09:24,793 INFO L225 Difference]: With dead ends: 111 [2021-10-15 19:09:24,794 INFO L226 Difference]: Without dead ends: 111 [2021-10-15 19:09:24,795 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 113.2ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-15 19:09:24,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-10-15 19:09:24,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 63. [2021-10-15 19:09:24,809 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 19:09:24,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 68 transitions. [2021-10-15 19:09:24,811 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 68 transitions. Word has length 10 [2021-10-15 19:09:24,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 19:09:24,812 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 68 transitions. [2021-10-15 19:09:24,812 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 19:09:24,812 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 68 transitions. [2021-10-15 19:09:24,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-15 19:09:24,813 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 19:09:24,813 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:09:24,813 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-15 19:09:24,813 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 19:09:24,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:09:24,814 INFO L82 PathProgramCache]: Analyzing trace with hash 1216562944, now seen corresponding path program 1 times [2021-10-15 19:09:24,815 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:09:24,815 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420240375] [2021-10-15 19:09:24,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:09:24,815 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:09:24,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:09:24,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-15 19:09:24,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:09:24,955 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 19:09:24,955 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:09:24,955 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420240375] [2021-10-15 19:09:24,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420240375] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:09:24,958 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:09:24,958 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:09:24,960 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146350372] [2021-10-15 19:09:24,965 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 19:09:24,965 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:09:24,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 19:09:24,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-15 19:09:24,967 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 19:09:25,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 19:09:25,087 INFO L93 Difference]: Finished difference Result 62 states and 66 transitions. [2021-10-15 19:09:25,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 19:09:25,089 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 19:09:25,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 19:09:25,097 INFO L225 Difference]: With dead ends: 62 [2021-10-15 19:09:25,098 INFO L226 Difference]: Without dead ends: 62 [2021-10-15 19:09:25,098 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 39.3ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-15 19:09:25,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-10-15 19:09:25,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2021-10-15 19:09:25,108 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 19:09:25,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 66 transitions. [2021-10-15 19:09:25,117 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 66 transitions. Word has length 10 [2021-10-15 19:09:25,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 19:09:25,118 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 66 transitions. [2021-10-15 19:09:25,118 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 19:09:25,118 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 66 transitions. [2021-10-15 19:09:25,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-15 19:09:25,119 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 19:09:25,119 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:09:25,119 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-15 19:09:25,120 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 19:09:25,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:09:25,121 INFO L82 PathProgramCache]: Analyzing trace with hash 887456838, now seen corresponding path program 1 times [2021-10-15 19:09:25,121 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:09:25,122 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883063226] [2021-10-15 19:09:25,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:09:25,122 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:09:25,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:09:25,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-15 19:09:25,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:09:25,289 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 19:09:25,290 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:09:25,290 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883063226] [2021-10-15 19:09:25,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883063226] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:09:25,297 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882291216] [2021-10-15 19:09:25,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:09:25,298 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:09:25,298 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bbbc7ec-072b-4071-baf6-f7b5032a0e93/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:09:25,304 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bbbc7ec-072b-4071-baf6-f7b5032a0e93/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:09:25,327 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bbbc7ec-072b-4071-baf6-f7b5032a0e93/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-15 19:09:25,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:09:25,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-15 19:09:25,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:09:25,617 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-10-15 19:09:25,618 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 19:09:25,698 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 19:09:25,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [882291216] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:09:25,699 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:09:25,699 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2021-10-15 19:09:25,699 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016697880] [2021-10-15 19:09:25,700 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-15 19:09:25,700 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:09:25,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-15 19:09:25,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-10-15 19:09:25,701 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 19:09:25,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 19:09:25,821 INFO L93 Difference]: Finished difference Result 108 states and 114 transitions. [2021-10-15 19:09:25,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-15 19:09:25,822 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 19:09:25,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 19:09:25,823 INFO L225 Difference]: With dead ends: 108 [2021-10-15 19:09:25,823 INFO L226 Difference]: Without dead ends: 108 [2021-10-15 19:09:25,824 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 119.9ms TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-10-15 19:09:25,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-10-15 19:09:25,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 57. [2021-10-15 19:09:25,829 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 19:09:25,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 60 transitions. [2021-10-15 19:09:25,831 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 60 transitions. Word has length 12 [2021-10-15 19:09:25,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 19:09:25,831 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 60 transitions. [2021-10-15 19:09:25,831 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 19:09:25,832 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 60 transitions. [2021-10-15 19:09:25,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-15 19:09:25,832 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 19:09:25,832 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:09:25,892 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bbbc7ec-072b-4071-baf6-f7b5032a0e93/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-15 19:09:26,058 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bbbc7ec-072b-4071-baf6-f7b5032a0e93/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:09:26,059 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 19:09:26,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:09:26,059 INFO L82 PathProgramCache]: Analyzing trace with hash -1178486182, now seen corresponding path program 1 times [2021-10-15 19:09:26,060 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:09:26,060 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738591786] [2021-10-15 19:09:26,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:09:26,060 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:09:26,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:09:26,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-15 19:09:26,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:09:26,231 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 19:09:26,231 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:09:26,232 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738591786] [2021-10-15 19:09:26,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738591786] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:09:26,232 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:09:26,232 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-15 19:09:26,232 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007565874] [2021-10-15 19:09:26,233 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-15 19:09:26,233 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:09:26,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-15 19:09:26,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-15 19:09:26,234 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 19:09:26,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 19:09:26,443 INFO L93 Difference]: Finished difference Result 54 states and 57 transitions. [2021-10-15 19:09:26,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-15 19:09:26,444 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 19:09:26,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 19:09:26,445 INFO L225 Difference]: With dead ends: 54 [2021-10-15 19:09:26,445 INFO L226 Difference]: Without dead ends: 54 [2021-10-15 19:09:26,446 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 119.3ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-10-15 19:09:26,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-10-15 19:09:26,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2021-10-15 19:09:26,450 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 19:09:26,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 57 transitions. [2021-10-15 19:09:26,451 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 57 transitions. Word has length 15 [2021-10-15 19:09:26,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 19:09:26,452 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 57 transitions. [2021-10-15 19:09:26,452 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 19:09:26,452 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 57 transitions. [2021-10-15 19:09:26,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-15 19:09:26,453 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 19:09:26,453 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:09:26,453 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-15 19:09:26,453 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 19:09:26,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:09:26,454 INFO L82 PathProgramCache]: Analyzing trace with hash -1178486181, now seen corresponding path program 1 times [2021-10-15 19:09:26,454 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:09:26,454 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228447596] [2021-10-15 19:09:26,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:09:26,455 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:09:26,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:09:26,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-15 19:09:26,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:09:26,617 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 19:09:26,619 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:09:26,619 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228447596] [2021-10-15 19:09:26,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228447596] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:09:26,620 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:09:26,620 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-15 19:09:26,623 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366262478] [2021-10-15 19:09:26,624 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-15 19:09:26,624 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:09:26,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-15 19:09:26,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-15 19:09:26,628 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 19:09:27,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 19:09:27,002 INFO L93 Difference]: Finished difference Result 98 states and 103 transitions. [2021-10-15 19:09:27,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-15 19:09:27,002 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 19:09:27,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 19:09:27,004 INFO L225 Difference]: With dead ends: 98 [2021-10-15 19:09:27,004 INFO L226 Difference]: Without dead ends: 98 [2021-10-15 19:09:27,004 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 153.8ms TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-10-15 19:09:27,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-10-15 19:09:27,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 74. [2021-10-15 19:09:27,011 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 19:09:27,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 83 transitions. [2021-10-15 19:09:27,012 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 83 transitions. Word has length 15 [2021-10-15 19:09:27,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 19:09:27,013 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 83 transitions. [2021-10-15 19:09:27,013 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 19:09:27,013 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 83 transitions. [2021-10-15 19:09:27,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-15 19:09:27,014 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 19:09:27,014 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:09:27,015 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-15 19:09:27,015 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 19:09:27,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:09:27,015 INFO L82 PathProgramCache]: Analyzing trace with hash -939786186, now seen corresponding path program 1 times [2021-10-15 19:09:27,015 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:09:27,016 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214001344] [2021-10-15 19:09:27,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:09:27,016 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:09:27,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:09:27,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-15 19:09:27,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:09:27,193 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 19:09:27,193 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:09:27,194 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214001344] [2021-10-15 19:09:27,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214001344] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:09:27,194 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458956536] [2021-10-15 19:09:27,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:09:27,194 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:09:27,194 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bbbc7ec-072b-4071-baf6-f7b5032a0e93/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:09:27,200 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bbbc7ec-072b-4071-baf6-f7b5032a0e93/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:09:27,218 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bbbc7ec-072b-4071-baf6-f7b5032a0e93/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-15 19:09:27,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:09:27,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-15 19:09:27,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:09:27,454 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-10-15 19:09:27,455 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 19:09:27,682 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 19:09:27,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1458956536] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:09:27,683 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:09:27,683 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2021-10-15 19:09:27,683 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386261566] [2021-10-15 19:09:27,684 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-15 19:09:27,684 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:09:27,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-15 19:09:27,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-10-15 19:09:27,686 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 19:09:27,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 19:09:27,876 INFO L93 Difference]: Finished difference Result 104 states and 109 transitions. [2021-10-15 19:09:27,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-15 19:09:27,876 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 19:09:27,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 19:09:27,878 INFO L225 Difference]: With dead ends: 104 [2021-10-15 19:09:27,878 INFO L226 Difference]: Without dead ends: 104 [2021-10-15 19:09:27,878 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 173.3ms TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-10-15 19:09:27,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-10-15 19:09:27,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 71. [2021-10-15 19:09:27,885 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 19:09:27,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 77 transitions. [2021-10-15 19:09:27,886 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 77 transitions. Word has length 17 [2021-10-15 19:09:27,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 19:09:27,887 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 77 transitions. [2021-10-15 19:09:27,887 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 19:09:27,887 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 77 transitions. [2021-10-15 19:09:27,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-15 19:09:27,888 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 19:09:27,888 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 19:09:27,929 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bbbc7ec-072b-4071-baf6-f7b5032a0e93/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-15 19:09:28,110 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bbbc7ec-072b-4071-baf6-f7b5032a0e93/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:09:28,111 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 19:09:28,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:09:28,111 INFO L82 PathProgramCache]: Analyzing trace with hash -1219116994, now seen corresponding path program 1 times [2021-10-15 19:09:28,112 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:09:28,112 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613081569] [2021-10-15 19:09:28,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:09:28,112 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:09:28,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:09:28,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-15 19:09:28,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:09:28,218 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 19:09:28,218 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:09:28,218 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613081569] [2021-10-15 19:09:28,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613081569] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:09:28,219 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388030737] [2021-10-15 19:09:28,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:09:28,219 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:09:28,220 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bbbc7ec-072b-4071-baf6-f7b5032a0e93/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:09:28,220 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bbbc7ec-072b-4071-baf6-f7b5032a0e93/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:09:28,242 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bbbc7ec-072b-4071-baf6-f7b5032a0e93/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-15 19:09:28,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:09:28,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-15 19:09:28,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:09:28,502 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 19:09:28,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [388030737] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:09:28,503 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:09:28,503 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2021-10-15 19:09:28,504 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871792592] [2021-10-15 19:09:28,504 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-15 19:09:28,506 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:09:28,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-15 19:09:28,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-10-15 19:09:28,507 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 19:09:28,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 19:09:28,546 INFO L93 Difference]: Finished difference Result 97 states and 101 transitions. [2021-10-15 19:09:28,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-15 19:09:28,546 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 19:09:28,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 19:09:28,548 INFO L225 Difference]: With dead ends: 97 [2021-10-15 19:09:28,548 INFO L226 Difference]: Without dead ends: 97 [2021-10-15 19:09:28,548 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 66.9ms TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-10-15 19:09:28,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-10-15 19:09:28,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 70. [2021-10-15 19:09:28,564 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 19:09:28,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 74 transitions. [2021-10-15 19:09:28,568 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 74 transitions. Word has length 18 [2021-10-15 19:09:28,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 19:09:28,569 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 74 transitions. [2021-10-15 19:09:28,569 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 19:09:28,569 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 74 transitions. [2021-10-15 19:09:28,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-15 19:09:28,570 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 19:09:28,571 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 19:09:28,610 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bbbc7ec-072b-4071-baf6-f7b5032a0e93/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-15 19:09:28,794 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bbbc7ec-072b-4071-baf6-f7b5032a0e93/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:09:28,795 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 19:09:28,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:09:28,795 INFO L82 PathProgramCache]: Analyzing trace with hash 1721559171, now seen corresponding path program 1 times [2021-10-15 19:09:28,795 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:09:28,796 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33252742] [2021-10-15 19:09:28,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:09:28,796 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:09:28,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:09:28,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-15 19:09:28,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:09:28,975 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 19:09:28,975 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:09:28,976 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33252742] [2021-10-15 19:09:28,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33252742] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:09:28,979 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772183739] [2021-10-15 19:09:28,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:09:28,979 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:09:28,979 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bbbc7ec-072b-4071-baf6-f7b5032a0e93/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:09:28,983 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bbbc7ec-072b-4071-baf6-f7b5032a0e93/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:09:29,006 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bbbc7ec-072b-4071-baf6-f7b5032a0e93/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-15 19:09:29,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:09:29,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-15 19:09:29,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:09:29,242 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-10-15 19:09:29,242 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 19:09:29,485 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 19:09:29,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1772183739] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:09:29,486 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 19:09:29,486 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 12 [2021-10-15 19:09:29,486 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422276287] [2021-10-15 19:09:29,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-15 19:09:29,487 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:09:29,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-15 19:09:29,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-10-15 19:09:29,488 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 19:09:30,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 19:09:30,293 INFO L93 Difference]: Finished difference Result 112 states and 117 transitions. [2021-10-15 19:09:30,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-15 19:09:30,294 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 19:09:30,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 19:09:30,297 INFO L225 Difference]: With dead ends: 112 [2021-10-15 19:09:30,297 INFO L226 Difference]: Without dead ends: 112 [2021-10-15 19:09:30,298 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 373.3ms TimeCoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2021-10-15 19:09:30,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-10-15 19:09:30,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 73. [2021-10-15 19:09:30,303 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 19:09:30,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 77 transitions. [2021-10-15 19:09:30,304 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 77 transitions. Word has length 20 [2021-10-15 19:09:30,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 19:09:30,304 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 77 transitions. [2021-10-15 19:09:30,304 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 19:09:30,305 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 77 transitions. [2021-10-15 19:09:30,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-15 19:09:30,306 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 19:09:30,306 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 19:09:30,348 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bbbc7ec-072b-4071-baf6-f7b5032a0e93/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-15 19:09:30,523 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bbbc7ec-072b-4071-baf6-f7b5032a0e93/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-10-15 19:09:30,523 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 19:09:30,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:09:30,523 INFO L82 PathProgramCache]: Analyzing trace with hash -1762222077, now seen corresponding path program 1 times [2021-10-15 19:09:30,523 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:09:30,524 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152531707] [2021-10-15 19:09:30,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:09:30,524 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:09:30,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:09:30,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-15 19:09:30,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:09:30,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-15 19:09:30,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:09:30,614 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 19:09:30,614 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:09:30,614 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152531707] [2021-10-15 19:09:30,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152531707] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:09:30,615 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:09:30,615 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-15 19:09:30,615 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843057737] [2021-10-15 19:09:30,615 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-15 19:09:30,615 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:09:30,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-15 19:09:30,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-15 19:09:30,616 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 19:09:30,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 19:09:30,881 INFO L93 Difference]: Finished difference Result 71 states and 75 transitions. [2021-10-15 19:09:30,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-15 19:09:30,882 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 19:09:30,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 19:09:30,883 INFO L225 Difference]: With dead ends: 71 [2021-10-15 19:09:30,883 INFO L226 Difference]: Without dead ends: 71 [2021-10-15 19:09:30,884 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 164.7ms TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-10-15 19:09:30,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-10-15 19:09:30,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2021-10-15 19:09:30,887 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 19:09:30,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 75 transitions. [2021-10-15 19:09:30,888 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 75 transitions. Word has length 22 [2021-10-15 19:09:30,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 19:09:30,889 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 75 transitions. [2021-10-15 19:09:30,889 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 19:09:30,889 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 75 transitions. [2021-10-15 19:09:30,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-15 19:09:30,890 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 19:09:30,891 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 19:09:30,891 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-10-15 19:09:30,891 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 19:09:30,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:09:30,892 INFO L82 PathProgramCache]: Analyzing trace with hash -1762222076, now seen corresponding path program 1 times [2021-10-15 19:09:30,892 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:09:30,892 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317615735] [2021-10-15 19:09:30,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:09:30,893 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:09:30,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:09:30,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-15 19:09:30,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:09:30,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-15 19:09:30,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:09:30,997 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 19:09:30,997 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:09:30,997 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317615735] [2021-10-15 19:09:30,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317615735] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:09:30,998 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:09:30,998 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-15 19:09:30,998 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097419867] [2021-10-15 19:09:30,999 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-15 19:09:30,999 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:09:30,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-15 19:09:31,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-10-15 19:09:31,000 INFO L87 Difference]: Start difference. First operand 71 states and 75 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) 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 19:09:31,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 19:09:31,286 INFO L93 Difference]: Finished difference Result 74 states and 76 transitions. [2021-10-15 19:09:31,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-15 19:09:31,287 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) 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 19:09:31,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 19:09:31,288 INFO L225 Difference]: With dead ends: 74 [2021-10-15 19:09:31,288 INFO L226 Difference]: Without dead ends: 74 [2021-10-15 19:09:31,289 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 179.9ms TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-10-15 19:09:31,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-10-15 19:09:31,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 61. [2021-10-15 19:09:31,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 47 states have (on average 1.2127659574468086) internal successors, (57), 53 states have internal predecessors, (57), 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 19:09:31,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 64 transitions. [2021-10-15 19:09:31,292 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 64 transitions. Word has length 22 [2021-10-15 19:09:31,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 19:09:31,292 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 64 transitions. [2021-10-15 19:09:31,293 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.8333333333333335) 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 19:09:31,293 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 64 transitions. [2021-10-15 19:09:31,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-15 19:09:31,294 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 19:09:31,294 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:09:31,294 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-10-15 19:09:31,294 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting fooErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 16 more)] === [2021-10-15 19:09:31,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:09:31,295 INFO L82 PathProgramCache]: Analyzing trace with hash 764805398, now seen corresponding path program 2 times [2021-10-15 19:09:31,295 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:09:31,295 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077287013] [2021-10-15 19:09:31,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:09:31,295 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:09:31,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:09:31,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-15 19:09:31,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:09:31,403 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:09:31,403 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:09:31,404 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077287013] [2021-10-15 19:09:31,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077287013] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:09:31,404 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668553746] [2021-10-15 19:09:31,404 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-15 19:09:31,404 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:09:31,405 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bbbc7ec-072b-4071-baf6-f7b5032a0e93/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:09:31,407 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bbbc7ec-072b-4071-baf6-f7b5032a0e93/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:09:31,423 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bbbc7ec-072b-4071-baf6-f7b5032a0e93/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-15 19:09:31,606 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-15 19:09:31,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:09:31,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-15 19:09:31,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:09:31,799 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:09:31,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1668553746] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:09:31,800 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 19:09:31,800 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2021-10-15 19:09:31,801 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813827094] [2021-10-15 19:09:31,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-15 19:09:31,801 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:09:31,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-15 19:09:31,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-10-15 19:09:31,803 INFO L87 Difference]: Start difference. First operand 61 states and 64 transitions. Second operand has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 19:09:32,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 19:09:32,457 INFO L93 Difference]: Finished difference Result 111 states and 113 transitions. [2021-10-15 19:09:32,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-15 19:09:32,458 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2021-10-15 19:09:32,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 19:09:32,459 INFO L225 Difference]: With dead ends: 111 [2021-10-15 19:09:32,459 INFO L226 Difference]: Without dead ends: 111 [2021-10-15 19:09:32,460 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 521.5ms TimeCoverageRelationStatistics Valid=123, Invalid=339, Unknown=0, NotChecked=0, Total=462 [2021-10-15 19:09:32,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-10-15 19:09:32,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 82. [2021-10-15 19:09:32,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 66 states have (on average 1.1818181818181819) internal successors, (78), 73 states have internal predecessors, (78), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-15 19:09:32,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 87 transitions. [2021-10-15 19:09:32,464 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 87 transitions. Word has length 23 [2021-10-15 19:09:32,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 19:09:32,464 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 87 transitions. [2021-10-15 19:09:32,465 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 19:09:32,465 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 87 transitions. [2021-10-15 19:09:32,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-15 19:09:32,466 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 19:09:32,467 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, 1, 1, 1] [2021-10-15 19:09:32,498 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bbbc7ec-072b-4071-baf6-f7b5032a0e93/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-15 19:09:32,667 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bbbc7ec-072b-4071-baf6-f7b5032a0e93/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:09:32,668 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr11ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 16 more)] === [2021-10-15 19:09:32,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:09:32,668 INFO L82 PathProgramCache]: Analyzing trace with hash -972613003, now seen corresponding path program 1 times [2021-10-15 19:09:32,668 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:09:32,668 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046577230] [2021-10-15 19:09:32,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:09:32,669 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:09:32,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:09:32,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-15 19:09:32,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:09:32,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-15 19:09:32,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:09:32,758 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 19:09:32,759 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:09:32,759 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046577230] [2021-10-15 19:09:32,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046577230] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:09:32,759 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:09:32,759 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-15 19:09:32,760 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527078213] [2021-10-15 19:09:32,760 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-15 19:09:32,760 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:09:32,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-15 19:09:32,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-15 19:09:32,762 INFO L87 Difference]: Start difference. First operand 82 states and 87 transitions. Second operand has 5 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 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 19:09:32,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 19:09:32,967 INFO L93 Difference]: Finished difference Result 80 states and 85 transitions. [2021-10-15 19:09:32,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-15 19:09:32,967 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 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 25 [2021-10-15 19:09:32,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 19:09:32,968 INFO L225 Difference]: With dead ends: 80 [2021-10-15 19:09:32,969 INFO L226 Difference]: Without dead ends: 80 [2021-10-15 19:09:32,969 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 142.6ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-10-15 19:09:32,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-10-15 19:09:32,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2021-10-15 19:09:32,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 66 states have (on average 1.1515151515151516) internal successors, (76), 71 states have internal predecessors, (76), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-15 19:09:32,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 85 transitions. [2021-10-15 19:09:32,973 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 85 transitions. Word has length 25 [2021-10-15 19:09:32,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 19:09:32,974 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 85 transitions. [2021-10-15 19:09:32,974 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 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 19:09:32,974 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 85 transitions. [2021-10-15 19:09:32,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-15 19:09:32,983 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 19:09:32,984 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:09:32,984 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-10-15 19:09:32,984 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting fooErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 16 more)] === [2021-10-15 19:09:32,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:09:32,985 INFO L82 PathProgramCache]: Analyzing trace with hash 538529121, now seen corresponding path program 1 times [2021-10-15 19:09:32,985 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:09:32,986 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833216755] [2021-10-15 19:09:32,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:09:32,986 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:09:33,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:09:33,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-15 19:09:33,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:09:33,212 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-15 19:09:33,212 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:09:33,212 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833216755] [2021-10-15 19:09:33,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833216755] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:09:33,213 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200025686] [2021-10-15 19:09:33,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:09:33,213 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:09:33,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bbbc7ec-072b-4071-baf6-f7b5032a0e93/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:09:33,214 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bbbc7ec-072b-4071-baf6-f7b5032a0e93/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:09:33,239 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bbbc7ec-072b-4071-baf6-f7b5032a0e93/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-15 19:09:33,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:09:33,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-15 19:09:33,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:09:33,509 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-10-15 19:09:33,510 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 19:09:33,768 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-15 19:09:33,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [200025686] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:09:33,768 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:09:33,769 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2021-10-15 19:09:33,769 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467473689] [2021-10-15 19:09:33,770 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-15 19:09:33,770 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:09:33,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-15 19:09:33,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-10-15 19:09:33,772 INFO L87 Difference]: Start difference. First operand 80 states and 85 transitions. Second operand has 6 states, 5 states have (on average 3.6) internal successors, (18), 6 states have internal predecessors, (18), 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 19:09:33,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 19:09:33,903 INFO L93 Difference]: Finished difference Result 92 states and 95 transitions. [2021-10-15 19:09:33,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-15 19:09:33,903 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 6 states have internal predecessors, (18), 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 25 [2021-10-15 19:09:33,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 19:09:33,905 INFO L225 Difference]: With dead ends: 92 [2021-10-15 19:09:33,905 INFO L226 Difference]: Without dead ends: 92 [2021-10-15 19:09:33,905 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 152.0ms TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-10-15 19:09:33,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-10-15 19:09:33,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 79. [2021-10-15 19:09:33,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 66 states have (on average 1.121212121212121) internal successors, (74), 71 states have internal predecessors, (74), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-15 19:09:33,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 83 transitions. [2021-10-15 19:09:33,909 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 83 transitions. Word has length 25 [2021-10-15 19:09:33,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 19:09:33,909 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 83 transitions. [2021-10-15 19:09:33,910 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 6 states have internal predecessors, (18), 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 19:09:33,910 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 83 transitions. [2021-10-15 19:09:33,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-15 19:09:33,910 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 19:09:33,911 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:09:33,945 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bbbc7ec-072b-4071-baf6-f7b5032a0e93/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-15 19:09:34,111 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bbbc7ec-072b-4071-baf6-f7b5032a0e93/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:09:34,112 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting fooErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 16 more)] === [2021-10-15 19:09:34,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:09:34,112 INFO L82 PathProgramCache]: Analyzing trace with hash -1438237711, now seen corresponding path program 3 times [2021-10-15 19:09:34,112 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:09:34,112 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128754865] [2021-10-15 19:09:34,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:09:34,113 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:09:34,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:09:34,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-15 19:09:34,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:09:34,348 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:09:34,348 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:09:34,348 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128754865] [2021-10-15 19:09:34,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128754865] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:09:34,349 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385186282] [2021-10-15 19:09:34,349 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-15 19:09:34,350 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:09:34,350 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bbbc7ec-072b-4071-baf6-f7b5032a0e93/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:09:34,351 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bbbc7ec-072b-4071-baf6-f7b5032a0e93/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:09:34,370 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bbbc7ec-072b-4071-baf6-f7b5032a0e93/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-15 19:09:34,542 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-15 19:09:34,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:09:34,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-15 19:09:34,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:09:34,594 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-10-15 19:09:34,594 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 13 treesize of output 15 [2021-10-15 19:09:34,866 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-10-15 19:09:34,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [385186282] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:09:34,866 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 19:09:34,866 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5] total 14 [2021-10-15 19:09:34,867 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456414049] [2021-10-15 19:09:34,867 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-15 19:09:34,867 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:09:34,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-15 19:09:34,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-10-15 19:09:34,868 INFO L87 Difference]: Start difference. First operand 79 states and 83 transitions. Second operand has 15 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 states have internal predecessors, (37), 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 19:09:36,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 19:09:36,165 INFO L93 Difference]: Finished difference Result 111 states and 113 transitions. [2021-10-15 19:09:36,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-15 19:09:36,165 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 states have internal predecessors, (37), 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 25 [2021-10-15 19:09:36,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 19:09:36,167 INFO L225 Difference]: With dead ends: 111 [2021-10-15 19:09:36,167 INFO L226 Difference]: Without dead ends: 111 [2021-10-15 19:09:36,168 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 967.8ms TimeCoverageRelationStatistics Valid=241, Invalid=689, Unknown=0, NotChecked=0, Total=930 [2021-10-15 19:09:36,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-10-15 19:09:36,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 82. [2021-10-15 19:09:36,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 70 states have (on average 1.1) internal successors, (77), 74 states have internal predecessors, (77), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-15 19:09:36,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 86 transitions. [2021-10-15 19:09:36,173 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 86 transitions. Word has length 25 [2021-10-15 19:09:36,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 19:09:36,173 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 86 transitions. [2021-10-15 19:09:36,173 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 states have internal predecessors, (37), 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 19:09:36,174 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 86 transitions. [2021-10-15 19:09:36,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-15 19:09:36,175 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 19:09:36,175 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, 1, 1, 1, 1, 1] [2021-10-15 19:09:36,208 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bbbc7ec-072b-4071-baf6-f7b5032a0e93/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-15 19:09:36,390 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bbbc7ec-072b-4071-baf6-f7b5032a0e93/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-10-15 19:09:36,394 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr13ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 16 more)] === [2021-10-15 19:09:36,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:09:36,395 INFO L82 PathProgramCache]: Analyzing trace with hash 1621777527, now seen corresponding path program 1 times [2021-10-15 19:09:36,395 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:09:36,395 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957120667] [2021-10-15 19:09:36,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:09:36,395 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:09:36,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-15 19:09:36,414 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-15 19:09:36,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-15 19:09:36,470 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-15 19:09:36,482 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-15 19:09:36,484 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location mainErr13ASSERT_VIOLATIONMEMORY_FREE [2021-10-15 19:09:36,486 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr0REQUIRES_VIOLATION [2021-10-15 19:09:36,488 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr1REQUIRES_VIOLATION [2021-10-15 19:09:36,488 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr2REQUIRES_VIOLATION [2021-10-15 19:09:36,488 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr3REQUIRES_VIOLATION [2021-10-15 19:09:36,489 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr4ASSERT_VIOLATIONMEMORY_FREE [2021-10-15 19:09:36,489 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr5ASSERT_VIOLATIONMEMORY_FREE [2021-10-15 19:09:36,489 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr6ASSERT_VIOLATIONMEMORY_FREE [2021-10-15 19:09:36,489 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr7ASSERT_VIOLATIONMEMORY_FREE [2021-10-15 19:09:36,491 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr8ASSERT_VIOLATIONMEMORY_FREE [2021-10-15 19:09:36,491 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr9ASSERT_VIOLATIONMEMORY_FREE [2021-10-15 19:09:36,491 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr10ASSERT_VIOLATIONMEMORY_FREE [2021-10-15 19:09:36,491 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr11ASSERT_VIOLATIONMEMORY_FREE [2021-10-15 19:09:36,492 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr12ASSERT_VIOLATIONMEMORY_FREE [2021-10-15 19:09:36,492 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr14ASSERT_VIOLATIONMEMORY_FREE [2021-10-15 19:09:36,492 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr15ASSERT_VIOLATIONMEMORY_FREE [2021-10-15 19:09:36,492 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr16ENSURES_VIOLATIONMEMORY_LEAK [2021-10-15 19:09:36,493 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location fooErr0REQUIRES_VIOLATION [2021-10-15 19:09:36,493 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location fooErr1REQUIRES_VIOLATION [2021-10-15 19:09:36,493 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location fooErr2REQUIRES_VIOLATION [2021-10-15 19:09:36,493 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location fooErr3REQUIRES_VIOLATION [2021-10-15 19:09:36,494 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-10-15 19:09:36,502 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-15 19:09:36,581 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.10 07:09:36 BoogieIcfgContainer [2021-10-15 19:09:36,582 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-15 19:09:36,582 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-15 19:09:36,582 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-15 19:09:36,586 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-15 19:09:36,587 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:09:23" (3/4) ... [2021-10-15 19:09:36,589 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-15 19:09:36,656 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bbbc7ec-072b-4071-baf6-f7b5032a0e93/bin/uautomizer-hJ6jxDFKc3/witness.graphml [2021-10-15 19:09:36,656 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-15 19:09:36,657 INFO L168 Benchmark]: Toolchain (without parser) took 14819.43 ms. Allocated memory was 90.2 MB in the beginning and 109.1 MB in the end (delta: 18.9 MB). Free memory was 48.3 MB in the beginning and 42.0 MB in the end (delta: 6.3 MB). Peak memory consumption was 26.0 MB. Max. memory is 16.1 GB. [2021-10-15 19:09:36,658 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 90.2 MB. Free memory is still 65.5 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 19:09:36,658 INFO L168 Benchmark]: CACSL2BoogieTranslator took 621.82 ms. Allocated memory is still 90.2 MB. Free memory was 48.1 MB in the beginning and 57.2 MB in the end (delta: -9.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-15 19:09:36,659 INFO L168 Benchmark]: Boogie Preprocessor took 79.18 ms. Allocated memory is still 90.2 MB. Free memory was 57.2 MB in the beginning and 54.5 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-15 19:09:36,659 INFO L168 Benchmark]: RCFGBuilder took 782.00 ms. Allocated memory is still 90.2 MB. Free memory was 54.5 MB in the beginning and 34.1 MB in the end (delta: 20.4 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. [2021-10-15 19:09:36,660 INFO L168 Benchmark]: TraceAbstraction took 13255.18 ms. Allocated memory was 90.2 MB in the beginning and 109.1 MB in the end (delta: 18.9 MB). Free memory was 33.6 MB in the beginning and 45.2 MB in the end (delta: -11.6 MB). Peak memory consumption was 8.9 MB. Max. memory is 16.1 GB. [2021-10-15 19:09:36,661 INFO L168 Benchmark]: Witness Printer took 74.15 ms. Allocated memory is still 109.1 MB. Free memory was 45.2 MB in the beginning and 42.0 MB in the end (delta: 3.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-15 19:09:36,663 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 90.2 MB. Free memory is still 65.5 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 621.82 ms. Allocated memory is still 90.2 MB. Free memory was 48.1 MB in the beginning and 57.2 MB in the end (delta: -9.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 79.18 ms. Allocated memory is still 90.2 MB. Free memory was 57.2 MB in the beginning and 54.5 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 782.00 ms. Allocated memory is still 90.2 MB. Free memory was 54.5 MB in the beginning and 34.1 MB in the end (delta: 20.4 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. * TraceAbstraction took 13255.18 ms. Allocated memory was 90.2 MB in the beginning and 109.1 MB in the end (delta: 18.9 MB). Free memory was 33.6 MB in the beginning and 45.2 MB in the end (delta: -11.6 MB). Peak memory consumption was 8.9 MB. Max. memory is 16.1 GB. * Witness Printer took 74.15 ms. Allocated memory is still 109.1 MB. Free memory was 45.2 MB in the beginning and 42.0 MB in the end (delta: 3.2 MB). Peak memory consumption was 4.2 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: 547]: free of unallocated memory possible free of unallocated memory possible We found a FailurePath: [L523] int *a, *b; [L524] int n; VAL [\old(a)=52, \old(a)=57, \old(b)=55, \old(b)=54, \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={-3:0}, b={-2:4}, b++={-2:0}, n=1] [L542] *b++ = 0 VAL [\old(a)=0, \old(a)=0, \old(b)=0, \old(b)=0, \old(n)=0, a={-3:0}, b={-2:4}, b++={-2:0}, n=1] [L543] CALL foo() VAL [\old(a)=0, \old(a)=0, \old(b)=0, \old(b)=0, \old(n)=0, a={-3:0}, b={-2:4}, 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={-3:0}, b={-2:4}, 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={-3:0}, b={-2:4}, i=0, n=1] [L530] a[i] = -1 VAL [\old(a)=0, \old(a)=0, \old(b)=0, \old(b)=0, \old(n)=0, a={-3:0}, b={-2:4}, i=0, n=1] [L529] i++ VAL [\old(a)=0, \old(a)=0, \old(b)=0, \old(b)=0, \old(n)=0, a={-3:0}, b={-2:4}, 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={-3:0}, b={-2:4}, i=1, n=1] [L531] i = 0 VAL [\old(a)=0, \old(a)=0, \old(b)=0, \old(b)=0, \old(n)=0, a={-3:0}, b={-2:4}, 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={-3:0}, b={-2:4}, i=0, n=1] [L543] RET foo() VAL [\old(a)=0, \old(a)=0, \old(b)=0, \old(b)=0, \old(n)=0, a={-3:0}, b={-2:4}, n=1] [L544] b[-1] VAL [\old(a)=0, \old(a)=0, \old(b)=0, \old(b)=0, \old(n)=0, a={-3:0}, b={-2:4}, b[-1]=0, n=1] [L544] COND FALSE !(b[-1]) [L547] free(a) VAL [\old(a)=0, \old(a)=0, \old(b)=0, \old(b)=0, \old(n)=0, a={-3:0}, b={-2:4}, n=1] [L547] free(a) VAL [\old(a)=0, \old(a)=0, \old(b)=0, \old(b)=0, \old(n)=0, a={-3:0}, b={-2:4}, n=1] [L547] free(a) [L547] free(b) VAL [\old(a)=0, \old(a)=0, \old(b)=0, \old(b)=0, \old(n)=0, a={-3:0}, b={-2:4}, n=1] - UnprovableResult [Line: 542]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 542]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 544]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 544]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 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: 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: 13043.4ms, OverallIterations: 16, TraceHistogramMax: 3, EmptinessCheckTime: 36.3ms, AutomataDifference: 5340.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 13.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 718 SDtfs, 1276 SDslu, 1249 SDs, 0 SdLazy, 2258 SolverSat, 191 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2426.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 299 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 3340.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=82occurred in iteration=12, InterpolantAutomatonStates: 124, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 147.4ms AutomataMinimizationTime, 15 MinimizatonAttempts, 306 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 137.3ms SsaConstructionTime, 469.1ms SatisfiabilityAnalysisTime, 3925.4ms InterpolantComputationTime, 435 NumberOfCodeBlocks, 430 NumberOfCodeBlocksAsserted, 25 NumberOfCheckSat, 386 ConstructedInterpolants, 0 QuantifiedInterpolants, 2879 SizeOfPredicates, 16 NumberOfNonLiveVariables, 1126 ConjunctsInSsa, 52 ConjunctsInUnsatCore, 22 InterpolantComputations, 12 PerfectInterpolantSequences, 47/81 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 19:09:36,714 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bbbc7ec-072b-4071-baf6-f7b5032a0e93/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...