./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-ext-properties/960521-1_1-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_22a226a4-ab17-4c18-ac4a-024e036908e8/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_22a226a4-ab17-4c18-ac4a-024e036908e8/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_22a226a4-ab17-4c18-ac4a-024e036908e8/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_22a226a4-ab17-4c18-ac4a-024e036908e8/bin/uautomizer/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-ext-properties/960521-1_1-1.i -s /tmp/vcloud-vcloud-master/worker/run_dir_22a226a4-ab17-4c18-ac4a-024e036908e8/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_22a226a4-ab17-4c18-ac4a-024e036908e8/bin/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 978f701fee046cd9a3f43bfb12d114d1876d2f10 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(valid-deref) --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-29 23:18:52,329 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-29 23:18:52,331 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-29 23:18:52,406 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-29 23:18:52,407 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-29 23:18:52,408 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-29 23:18:52,410 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-29 23:18:52,413 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-29 23:18:52,415 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-29 23:18:52,416 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-29 23:18:52,418 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-29 23:18:52,419 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-29 23:18:52,420 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-29 23:18:52,421 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-29 23:18:52,422 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-29 23:18:52,424 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-29 23:18:52,425 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-29 23:18:52,426 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-29 23:18:52,428 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-29 23:18:52,431 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-29 23:18:52,433 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-29 23:18:52,445 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-29 23:18:52,446 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-29 23:18:52,448 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-29 23:18:52,452 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-29 23:18:52,454 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-29 23:18:52,454 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-29 23:18:52,456 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-29 23:18:52,457 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-29 23:18:52,458 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-29 23:18:52,459 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-29 23:18:52,460 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-29 23:18:52,462 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-29 23:18:52,464 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-29 23:18:52,465 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-29 23:18:52,466 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-29 23:18:52,467 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-29 23:18:52,467 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-29 23:18:52,468 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-29 23:18:52,469 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-29 23:18:52,470 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-29 23:18:52,472 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_22a226a4-ab17-4c18-ac4a-024e036908e8/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2020-11-29 23:18:52,512 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-29 23:18:52,513 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-29 23:18:52,515 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-29 23:18:52,515 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-29 23:18:52,516 INFO L138 SettingsManager]: * Use SBE=true [2020-11-29 23:18:52,516 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-29 23:18:52,516 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-29 23:18:52,517 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-11-29 23:18:52,517 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-29 23:18:52,517 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-29 23:18:52,518 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-29 23:18:52,519 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-11-29 23:18:52,519 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-11-29 23:18:52,520 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-11-29 23:18:52,520 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-29 23:18:52,520 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-29 23:18:52,520 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-29 23:18:52,521 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-29 23:18:52,521 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-29 23:18:52,521 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-29 23:18:52,522 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-29 23:18:52,522 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-29 23:18:52,522 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-29 23:18:52,523 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-29 23:18:52,523 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-29 23:18:52,523 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-29 23:18:52,524 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-29 23:18:52,524 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-29 23:18:52,524 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-vcloud-master/worker/run_dir_22a226a4-ab17-4c18-ac4a-024e036908e8/bin/uautomizer/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_22a226a4-ab17-4c18-ac4a-024e036908e8/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 978f701fee046cd9a3f43bfb12d114d1876d2f10 [2020-11-29 23:18:52,825 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-29 23:18:52,863 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-29 23:18:52,868 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-29 23:18:52,869 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-29 23:18:52,870 INFO L275 PluginConnector]: CDTParser initialized [2020-11-29 23:18:52,871 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_22a226a4-ab17-4c18-ac4a-024e036908e8/bin/uautomizer/../../sv-benchmarks/c/list-ext-properties/960521-1_1-1.i [2020-11-29 23:18:52,937 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_22a226a4-ab17-4c18-ac4a-024e036908e8/bin/uautomizer/data/922f0ad8a/1a45517841f043268ed72edeca01f10c/FLAG43f36a722 [2020-11-29 23:18:53,378 INFO L306 CDTParser]: Found 1 translation units. [2020-11-29 23:18:53,379 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_22a226a4-ab17-4c18-ac4a-024e036908e8/sv-benchmarks/c/list-ext-properties/960521-1_1-1.i [2020-11-29 23:18:53,393 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_22a226a4-ab17-4c18-ac4a-024e036908e8/bin/uautomizer/data/922f0ad8a/1a45517841f043268ed72edeca01f10c/FLAG43f36a722 [2020-11-29 23:18:53,735 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_22a226a4-ab17-4c18-ac4a-024e036908e8/bin/uautomizer/data/922f0ad8a/1a45517841f043268ed72edeca01f10c [2020-11-29 23:18:53,737 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-29 23:18:53,739 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-11-29 23:18:53,740 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-29 23:18:53,741 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-29 23:18:53,744 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-29 23:18:53,745 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 11:18:53" (1/1) ... [2020-11-29 23:18:53,746 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@267c2c21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:18:53, skipping insertion in model container [2020-11-29 23:18:53,747 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 11:18:53" (1/1) ... [2020-11-29 23:18:53,767 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-29 23:18:53,803 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-29 23:18:54,111 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 23:18:54,119 INFO L203 MainTranslator]: Completed pre-run [2020-11-29 23:18:54,160 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 23:18:54,220 INFO L208 MainTranslator]: Completed translation [2020-11-29 23:18:54,221 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:18:54 WrapperNode [2020-11-29 23:18:54,222 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-29 23:18:54,223 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-29 23:18:54,223 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-29 23:18:54,223 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-29 23:18:54,234 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:18:54" (1/1) ... [2020-11-29 23:18:54,234 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:18:54" (1/1) ... [2020-11-29 23:18:54,270 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:18:54" (1/1) ... [2020-11-29 23:18:54,271 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:18:54" (1/1) ... [2020-11-29 23:18:54,297 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:18:54" (1/1) ... [2020-11-29 23:18:54,311 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:18:54" (1/1) ... [2020-11-29 23:18:54,314 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:18:54" (1/1) ... [2020-11-29 23:18:54,324 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-29 23:18:54,325 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-29 23:18:54,325 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-29 23:18:54,325 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-29 23:18:54,338 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:18:54" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_22a226a4-ab17-4c18-ac4a-024e036908e8/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-29 23:18:54,411 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-29 23:18:54,411 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-29 23:18:54,411 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-29 23:18:54,411 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-11-29 23:18:54,412 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-11-29 23:18:54,412 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2020-11-29 23:18:54,412 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2020-11-29 23:18:54,412 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2020-11-29 23:18:54,412 INFO L138 BoogieDeclarations]: Found implementation of procedure foo [2020-11-29 23:18:54,413 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-29 23:18:54,413 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-29 23:18:54,413 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-29 23:18:54,413 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-11-29 23:18:54,414 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-11-29 23:18:54,414 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-29 23:18:54,414 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-29 23:18:54,414 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-11-29 23:18:54,414 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-11-29 23:18:54,415 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-11-29 23:18:54,415 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-11-29 23:18:54,415 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-11-29 23:18:54,415 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-11-29 23:18:54,415 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-11-29 23:18:54,416 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-11-29 23:18:54,416 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-11-29 23:18:54,416 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-11-29 23:18:54,416 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-11-29 23:18:54,416 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-11-29 23:18:54,417 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-11-29 23:18:54,417 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-11-29 23:18:54,417 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-11-29 23:18:54,417 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-11-29 23:18:54,417 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-11-29 23:18:54,418 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-11-29 23:18:54,418 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2020-11-29 23:18:54,418 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2020-11-29 23:18:54,418 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2020-11-29 23:18:54,418 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-11-29 23:18:54,419 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-11-29 23:18:54,419 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-11-29 23:18:54,419 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-11-29 23:18:54,419 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-11-29 23:18:54,419 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-11-29 23:18:54,420 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-11-29 23:18:54,420 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-11-29 23:18:54,420 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-11-29 23:18:54,420 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-11-29 23:18:54,420 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-11-29 23:18:54,421 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-11-29 23:18:54,421 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-11-29 23:18:54,421 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-11-29 23:18:54,421 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-11-29 23:18:54,421 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-11-29 23:18:54,422 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-11-29 23:18:54,422 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-11-29 23:18:54,422 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-11-29 23:18:54,422 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-11-29 23:18:54,422 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-11-29 23:18:54,423 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-11-29 23:18:54,423 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-11-29 23:18:54,423 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-11-29 23:18:54,423 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-11-29 23:18:54,423 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-11-29 23:18:54,424 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-11-29 23:18:54,424 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-11-29 23:18:54,424 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-11-29 23:18:54,424 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-11-29 23:18:54,424 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-11-29 23:18:54,425 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-11-29 23:18:54,425 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-11-29 23:18:54,425 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-11-29 23:18:54,425 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-11-29 23:18:54,426 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-11-29 23:18:54,426 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-11-29 23:18:54,426 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-11-29 23:18:54,426 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-11-29 23:18:54,426 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-11-29 23:18:54,427 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-11-29 23:18:54,427 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-11-29 23:18:54,427 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-11-29 23:18:54,427 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-11-29 23:18:54,427 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-11-29 23:18:54,428 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-11-29 23:18:54,428 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-11-29 23:18:54,428 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-11-29 23:18:54,428 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-11-29 23:18:54,428 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-11-29 23:18:54,429 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-11-29 23:18:54,429 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-11-29 23:18:54,429 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-11-29 23:18:54,429 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-11-29 23:18:54,429 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-11-29 23:18:54,430 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-11-29 23:18:54,430 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-11-29 23:18:54,430 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-11-29 23:18:54,430 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-11-29 23:18:54,430 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-11-29 23:18:54,431 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-11-29 23:18:54,431 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-11-29 23:18:54,431 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-11-29 23:18:54,431 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-11-29 23:18:54,431 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-11-29 23:18:54,432 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-11-29 23:18:54,432 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-11-29 23:18:54,432 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-11-29 23:18:54,432 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-11-29 23:18:54,432 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-11-29 23:18:54,433 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-11-29 23:18:54,433 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-11-29 23:18:54,433 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-11-29 23:18:54,433 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-11-29 23:18:54,433 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-11-29 23:18:54,434 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-11-29 23:18:54,434 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-11-29 23:18:54,434 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-11-29 23:18:54,434 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-11-29 23:18:54,434 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-11-29 23:18:54,435 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-11-29 23:18:54,435 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-11-29 23:18:54,435 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-11-29 23:18:54,435 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-11-29 23:18:54,435 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-11-29 23:18:54,436 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-11-29 23:18:54,436 INFO L130 BoogieDeclarations]: Found specification of procedure foo [2020-11-29 23:18:54,436 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-29 23:18:54,436 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-29 23:18:54,437 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-11-29 23:18:54,437 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-29 23:18:54,437 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-29 23:18:54,437 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-29 23:18:54,437 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-29 23:18:54,438 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-29 23:18:55,010 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-29 23:18:55,010 INFO L298 CfgBuilder]: Removed 3 assume(true) statements. [2020-11-29 23:18:55,012 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 11:18:55 BoogieIcfgContainer [2020-11-29 23:18:55,012 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-29 23:18:55,014 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-29 23:18:55,014 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-29 23:18:55,020 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-29 23:18:55,021 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 11:18:53" (1/3) ... [2020-11-29 23:18:55,022 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@254003ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 11:18:55, skipping insertion in model container [2020-11-29 23:18:55,022 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:18:54" (2/3) ... [2020-11-29 23:18:55,023 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@254003ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 11:18:55, skipping insertion in model container [2020-11-29 23:18:55,023 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 11:18:55" (3/3) ... [2020-11-29 23:18:55,034 INFO L111 eAbstractionObserver]: Analyzing ICFG 960521-1_1-1.i [2020-11-29 23:18:55,045 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-29 23:18:55,050 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 22 error locations. [2020-11-29 23:18:55,068 INFO L253 AbstractCegarLoop]: Starting to check reachability of 22 error locations. [2020-11-29 23:18:55,103 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-29 23:18:55,104 INFO L378 AbstractCegarLoop]: Hoare is false [2020-11-29 23:18:55,104 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-29 23:18:55,104 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-29 23:18:55,104 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-29 23:18:55,104 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-29 23:18:55,104 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-29 23:18:55,104 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-29 23:18:55,127 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states. [2020-11-29 23:18:55,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-11-29 23:18:55,137 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:18:55,138 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 23:18:55,139 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, fooErr1REQUIRES_VIOLATION, fooErr0REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, fooErr3REQUIRES_VIOLATION, mainErr14ASSERT_VIOLATIONMEMORY_FREE, mainErr13ASSERT_VIOLATIONMEMORY_FREE, mainErr12ASSERT_VIOLATIONMEMORY_FREE, mainErr15ASSERT_VIOLATIONMEMORY_FREE, mainErr2REQUIRES_VIOLATION, mainErr10ASSERT_VIOLATIONMEMORY_FREE, mainErr3REQUIRES_VIOLATION, mainErr11ASSERT_VIOLATIONMEMORY_FREE, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr8ASSERT_VIOLATIONMEMORY_FREE, mainErr16ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr9ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6ASSERT_VIOLATIONMEMORY_FREE, mainErr7ASSERT_VIOLATIONMEMORY_FREE]=== [2020-11-29 23:18:55,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:18:55,146 INFO L82 PathProgramCache]: Analyzing trace with hash -334073084, now seen corresponding path program 1 times [2020-11-29 23:18:55,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:18:55,156 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470550924] [2020-11-29 23:18:55,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:18:55,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:18:55,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 23:18:55,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:18:55,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:18:55,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470550924] [2020-11-29 23:18:55,453 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 23:18:55,453 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-29 23:18:55,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060027312] [2020-11-29 23:18:55,458 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-29 23:18:55,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:18:55,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-29 23:18:55,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-29 23:18:55,474 INFO L87 Difference]: Start difference. First operand 62 states. Second operand 3 states. [2020-11-29 23:18:55,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:18:55,680 INFO L93 Difference]: Finished difference Result 62 states and 65 transitions. [2020-11-29 23:18:55,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-29 23:18:55,682 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2020-11-29 23:18:55,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:18:55,690 INFO L225 Difference]: With dead ends: 62 [2020-11-29 23:18:55,690 INFO L226 Difference]: Without dead ends: 59 [2020-11-29 23:18:55,692 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-29 23:18:55,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-11-29 23:18:55,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2020-11-29 23:18:55,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-11-29 23:18:55,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 62 transitions. [2020-11-29 23:18:55,728 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 62 transitions. Word has length 9 [2020-11-29 23:18:55,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:18:55,728 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 62 transitions. [2020-11-29 23:18:55,728 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-29 23:18:55,728 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 62 transitions. [2020-11-29 23:18:55,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-29 23:18:55,729 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:18:55,729 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 23:18:55,729 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-29 23:18:55,730 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, fooErr1REQUIRES_VIOLATION, fooErr0REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, fooErr3REQUIRES_VIOLATION, mainErr14ASSERT_VIOLATIONMEMORY_FREE, mainErr13ASSERT_VIOLATIONMEMORY_FREE, mainErr12ASSERT_VIOLATIONMEMORY_FREE, mainErr15ASSERT_VIOLATIONMEMORY_FREE, mainErr2REQUIRES_VIOLATION, mainErr10ASSERT_VIOLATIONMEMORY_FREE, mainErr3REQUIRES_VIOLATION, mainErr11ASSERT_VIOLATIONMEMORY_FREE, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr8ASSERT_VIOLATIONMEMORY_FREE, mainErr16ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr9ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6ASSERT_VIOLATIONMEMORY_FREE, mainErr7ASSERT_VIOLATIONMEMORY_FREE]=== [2020-11-29 23:18:55,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:18:55,730 INFO L82 PathProgramCache]: Analyzing trace with hash -1766545344, now seen corresponding path program 1 times [2020-11-29 23:18:55,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:18:55,731 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869821640] [2020-11-29 23:18:55,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:18:55,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:18:55,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 23:18:55,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:18:55,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:18:55,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869821640] [2020-11-29 23:18:55,832 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 23:18:55,833 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-29 23:18:55,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959723738] [2020-11-29 23:18:55,834 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-29 23:18:55,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:18:55,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 23:18:55,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-29 23:18:55,835 INFO L87 Difference]: Start difference. First operand 59 states and 62 transitions. Second operand 4 states. [2020-11-29 23:18:56,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:18:56,060 INFO L93 Difference]: Finished difference Result 58 states and 61 transitions. [2020-11-29 23:18:56,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 23:18:56,062 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-11-29 23:18:56,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:18:56,063 INFO L225 Difference]: With dead ends: 58 [2020-11-29 23:18:56,063 INFO L226 Difference]: Without dead ends: 58 [2020-11-29 23:18:56,064 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-29 23:18:56,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-11-29 23:18:56,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2020-11-29 23:18:56,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-11-29 23:18:56,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 61 transitions. [2020-11-29 23:18:56,068 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 61 transitions. Word has length 10 [2020-11-29 23:18:56,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:18:56,069 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 61 transitions. [2020-11-29 23:18:56,069 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-29 23:18:56,069 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 61 transitions. [2020-11-29 23:18:56,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-29 23:18:56,069 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:18:56,069 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 23:18:56,069 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-29 23:18:56,069 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, fooErr1REQUIRES_VIOLATION, fooErr0REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, fooErr3REQUIRES_VIOLATION, mainErr14ASSERT_VIOLATIONMEMORY_FREE, mainErr13ASSERT_VIOLATIONMEMORY_FREE, mainErr12ASSERT_VIOLATIONMEMORY_FREE, mainErr15ASSERT_VIOLATIONMEMORY_FREE, mainErr2REQUIRES_VIOLATION, mainErr10ASSERT_VIOLATIONMEMORY_FREE, mainErr3REQUIRES_VIOLATION, mainErr11ASSERT_VIOLATIONMEMORY_FREE, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr8ASSERT_VIOLATIONMEMORY_FREE, mainErr16ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr9ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6ASSERT_VIOLATIONMEMORY_FREE, mainErr7ASSERT_VIOLATIONMEMORY_FREE]=== [2020-11-29 23:18:56,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:18:56,070 INFO L82 PathProgramCache]: Analyzing trace with hash -1766545343, now seen corresponding path program 1 times [2020-11-29 23:18:56,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:18:56,070 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265955767] [2020-11-29 23:18:56,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:18:56,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:18:56,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 23:18:56,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:18:56,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:18:56,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265955767] [2020-11-29 23:18:56,225 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 23:18:56,225 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-29 23:18:56,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674034070] [2020-11-29 23:18:56,227 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-29 23:18:56,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:18:56,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-29 23:18:56,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-29 23:18:56,228 INFO L87 Difference]: Start difference. First operand 58 states and 61 transitions. Second operand 5 states. [2020-11-29 23:18:56,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:18:56,490 INFO L93 Difference]: Finished difference Result 109 states and 115 transitions. [2020-11-29 23:18:56,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-29 23:18:56,493 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-11-29 23:18:56,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:18:56,494 INFO L225 Difference]: With dead ends: 109 [2020-11-29 23:18:56,494 INFO L226 Difference]: Without dead ends: 109 [2020-11-29 23:18:56,495 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-11-29 23:18:56,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-11-29 23:18:56,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 62. [2020-11-29 23:18:56,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-11-29 23:18:56,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 66 transitions. [2020-11-29 23:18:56,504 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 66 transitions. Word has length 10 [2020-11-29 23:18:56,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:18:56,504 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 66 transitions. [2020-11-29 23:18:56,504 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-29 23:18:56,505 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 66 transitions. [2020-11-29 23:18:56,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-29 23:18:56,505 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:18:56,505 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 23:18:56,505 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-29 23:18:56,506 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, fooErr1REQUIRES_VIOLATION, fooErr0REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, fooErr3REQUIRES_VIOLATION, mainErr14ASSERT_VIOLATIONMEMORY_FREE, mainErr13ASSERT_VIOLATIONMEMORY_FREE, mainErr12ASSERT_VIOLATIONMEMORY_FREE, mainErr15ASSERT_VIOLATIONMEMORY_FREE, mainErr2REQUIRES_VIOLATION, mainErr10ASSERT_VIOLATIONMEMORY_FREE, mainErr3REQUIRES_VIOLATION, mainErr11ASSERT_VIOLATIONMEMORY_FREE, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr8ASSERT_VIOLATIONMEMORY_FREE, mainErr16ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr9ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6ASSERT_VIOLATIONMEMORY_FREE, mainErr7ASSERT_VIOLATIONMEMORY_FREE]=== [2020-11-29 23:18:56,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:18:56,506 INFO L82 PathProgramCache]: Analyzing trace with hash -1136421434, now seen corresponding path program 1 times [2020-11-29 23:18:56,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:18:56,507 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353739196] [2020-11-29 23:18:56,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:18:56,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:18:56,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 23:18:56,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:18:56,686 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:18:56,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353739196] [2020-11-29 23:18:56,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036982669] [2020-11-29 23:18:56,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_22a226a4-ab17-4c18-ac4a-024e036908e8/bin/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 23:18:56,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:18:56,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-29 23:18:56,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 23:18:57,094 INFO L350 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2020-11-29 23:18:57,095 INFO L384 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 [2020-11-29 23:18:57,095 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 23:18:57,116 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 23:18:57,123 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-11-29 23:18:57,124 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:20, output treesize:29 [2020-11-29 23:18:57,183 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:18:57,183 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-11-29 23:18:57,183 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2020-11-29 23:18:57,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875729376] [2020-11-29 23:18:57,184 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-29 23:18:57,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:18:57,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-29 23:18:57,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-11-29 23:18:57,185 INFO L87 Difference]: Start difference. First operand 62 states and 66 transitions. Second operand 5 states. [2020-11-29 23:18:57,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:18:57,495 INFO L93 Difference]: Finished difference Result 108 states and 114 transitions. [2020-11-29 23:18:57,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-29 23:18:57,499 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2020-11-29 23:18:57,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:18:57,500 INFO L225 Difference]: With dead ends: 108 [2020-11-29 23:18:57,500 INFO L226 Difference]: Without dead ends: 108 [2020-11-29 23:18:57,501 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-11-29 23:18:57,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-11-29 23:18:57,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 57. [2020-11-29 23:18:57,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-11-29 23:18:57,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 60 transitions. [2020-11-29 23:18:57,507 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 60 transitions. Word has length 12 [2020-11-29 23:18:57,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:18:57,507 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 60 transitions. [2020-11-29 23:18:57,507 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-29 23:18:57,507 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 60 transitions. [2020-11-29 23:18:57,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-29 23:18:57,508 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:18:57,508 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 23:18:57,715 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 23:18:57,715 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, fooErr1REQUIRES_VIOLATION, fooErr0REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, fooErr3REQUIRES_VIOLATION, mainErr14ASSERT_VIOLATIONMEMORY_FREE, mainErr13ASSERT_VIOLATIONMEMORY_FREE, mainErr12ASSERT_VIOLATIONMEMORY_FREE, mainErr15ASSERT_VIOLATIONMEMORY_FREE, mainErr2REQUIRES_VIOLATION, mainErr10ASSERT_VIOLATIONMEMORY_FREE, mainErr3REQUIRES_VIOLATION, mainErr11ASSERT_VIOLATIONMEMORY_FREE, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr8ASSERT_VIOLATIONMEMORY_FREE, mainErr16ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr9ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6ASSERT_VIOLATIONMEMORY_FREE, mainErr7ASSERT_VIOLATIONMEMORY_FREE]=== [2020-11-29 23:18:57,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:18:57,716 INFO L82 PathProgramCache]: Analyzing trace with hash -1785184100, now seen corresponding path program 1 times [2020-11-29 23:18:57,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:18:57,716 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058743181] [2020-11-29 23:18:57,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:18:57,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:18:57,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 23:18:57,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:18:57,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:18:57,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058743181] [2020-11-29 23:18:57,850 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 23:18:57,851 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-29 23:18:57,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674348900] [2020-11-29 23:18:57,851 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-29 23:18:57,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:18:57,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 23:18:57,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-29 23:18:57,852 INFO L87 Difference]: Start difference. First operand 57 states and 60 transitions. Second operand 4 states. [2020-11-29 23:18:58,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:18:58,064 INFO L93 Difference]: Finished difference Result 54 states and 57 transitions. [2020-11-29 23:18:58,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-29 23:18:58,065 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2020-11-29 23:18:58,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:18:58,066 INFO L225 Difference]: With dead ends: 54 [2020-11-29 23:18:58,066 INFO L226 Difference]: Without dead ends: 54 [2020-11-29 23:18:58,066 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-29 23:18:58,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-11-29 23:18:58,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-11-29 23:18:58,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-11-29 23:18:58,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 57 transitions. [2020-11-29 23:18:58,072 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 57 transitions. Word has length 15 [2020-11-29 23:18:58,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:18:58,072 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 57 transitions. [2020-11-29 23:18:58,072 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-29 23:18:58,073 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 57 transitions. [2020-11-29 23:18:58,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-29 23:18:58,073 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:18:58,073 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 23:18:58,073 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-29 23:18:58,074 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, fooErr1REQUIRES_VIOLATION, fooErr0REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, fooErr3REQUIRES_VIOLATION, mainErr14ASSERT_VIOLATIONMEMORY_FREE, mainErr13ASSERT_VIOLATIONMEMORY_FREE, mainErr12ASSERT_VIOLATIONMEMORY_FREE, mainErr15ASSERT_VIOLATIONMEMORY_FREE, mainErr2REQUIRES_VIOLATION, mainErr10ASSERT_VIOLATIONMEMORY_FREE, mainErr3REQUIRES_VIOLATION, mainErr11ASSERT_VIOLATIONMEMORY_FREE, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr8ASSERT_VIOLATIONMEMORY_FREE, mainErr16ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr9ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6ASSERT_VIOLATIONMEMORY_FREE, mainErr7ASSERT_VIOLATIONMEMORY_FREE]=== [2020-11-29 23:18:58,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:18:58,075 INFO L82 PathProgramCache]: Analyzing trace with hash -1785184099, now seen corresponding path program 1 times [2020-11-29 23:18:58,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:18:58,075 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360936228] [2020-11-29 23:18:58,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:18:58,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:18:58,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 23:18:58,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:18:58,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:18:58,235 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360936228] [2020-11-29 23:18:58,235 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 23:18:58,235 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-29 23:18:58,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277887235] [2020-11-29 23:18:58,244 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-29 23:18:58,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:18:58,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-29 23:18:58,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-11-29 23:18:58,248 INFO L87 Difference]: Start difference. First operand 54 states and 57 transitions. Second operand 6 states. [2020-11-29 23:18:58,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:18:58,614 INFO L93 Difference]: Finished difference Result 99 states and 104 transitions. [2020-11-29 23:18:58,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-29 23:18:58,614 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-11-29 23:18:58,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:18:58,615 INFO L225 Difference]: With dead ends: 99 [2020-11-29 23:18:58,615 INFO L226 Difference]: Without dead ends: 99 [2020-11-29 23:18:58,616 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-11-29 23:18:58,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-11-29 23:18:58,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 74. [2020-11-29 23:18:58,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-11-29 23:18:58,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 83 transitions. [2020-11-29 23:18:58,629 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 83 transitions. Word has length 15 [2020-11-29 23:18:58,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:18:58,632 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 83 transitions. [2020-11-29 23:18:58,632 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-29 23:18:58,632 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 83 transitions. [2020-11-29 23:18:58,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-11-29 23:18:58,633 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:18:58,633 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 23:18:58,633 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-29 23:18:58,633 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, fooErr1REQUIRES_VIOLATION, fooErr0REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, fooErr3REQUIRES_VIOLATION, mainErr14ASSERT_VIOLATIONMEMORY_FREE, mainErr13ASSERT_VIOLATIONMEMORY_FREE, mainErr12ASSERT_VIOLATIONMEMORY_FREE, mainErr15ASSERT_VIOLATIONMEMORY_FREE, mainErr2REQUIRES_VIOLATION, mainErr10ASSERT_VIOLATIONMEMORY_FREE, mainErr3REQUIRES_VIOLATION, mainErr11ASSERT_VIOLATIONMEMORY_FREE, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr8ASSERT_VIOLATIONMEMORY_FREE, mainErr16ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr9ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6ASSERT_VIOLATIONMEMORY_FREE, mainErr7ASSERT_VIOLATIONMEMORY_FREE]=== [2020-11-29 23:18:58,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:18:58,635 INFO L82 PathProgramCache]: Analyzing trace with hash 139066936, now seen corresponding path program 1 times [2020-11-29 23:18:58,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:18:58,635 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007117716] [2020-11-29 23:18:58,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:18:58,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:18:58,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 23:18:58,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:18:58,767 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:18:58,767 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007117716] [2020-11-29 23:18:58,767 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383462485] [2020-11-29 23:18:58,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_22a226a4-ab17-4c18-ac4a-024e036908e8/bin/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 23:18:58,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:18:58,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-29 23:18:58,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 23:18:58,968 INFO L350 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2020-11-29 23:18:58,969 INFO L384 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 [2020-11-29 23:18:58,969 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 23:18:58,982 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 23:18:58,986 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-11-29 23:18:58,986 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:20, output treesize:35 [2020-11-29 23:18:59,060 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:18:59,061 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-11-29 23:18:59,061 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2020-11-29 23:18:59,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943111354] [2020-11-29 23:18:59,062 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-29 23:18:59,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:18:59,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-29 23:18:59,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-11-29 23:18:59,063 INFO L87 Difference]: Start difference. First operand 74 states and 83 transitions. Second operand 6 states. [2020-11-29 23:18:59,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:18:59,251 INFO L93 Difference]: Finished difference Result 104 states and 109 transitions. [2020-11-29 23:18:59,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-29 23:18:59,252 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2020-11-29 23:18:59,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:18:59,253 INFO L225 Difference]: With dead ends: 104 [2020-11-29 23:18:59,253 INFO L226 Difference]: Without dead ends: 104 [2020-11-29 23:18:59,253 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2020-11-29 23:18:59,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-11-29 23:18:59,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 71. [2020-11-29 23:18:59,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-11-29 23:18:59,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 77 transitions. [2020-11-29 23:18:59,264 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 77 transitions. Word has length 17 [2020-11-29 23:18:59,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:18:59,264 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 77 transitions. [2020-11-29 23:18:59,264 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-29 23:18:59,264 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 77 transitions. [2020-11-29 23:18:59,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-11-29 23:18:59,266 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:18:59,266 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 23:18:59,487 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 23:18:59,488 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, fooErr1REQUIRES_VIOLATION, fooErr0REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, fooErr3REQUIRES_VIOLATION, mainErr14ASSERT_VIOLATIONMEMORY_FREE, mainErr13ASSERT_VIOLATIONMEMORY_FREE, mainErr12ASSERT_VIOLATIONMEMORY_FREE, mainErr15ASSERT_VIOLATIONMEMORY_FREE, mainErr2REQUIRES_VIOLATION, mainErr10ASSERT_VIOLATIONMEMORY_FREE, mainErr3REQUIRES_VIOLATION, mainErr11ASSERT_VIOLATIONMEMORY_FREE, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr8ASSERT_VIOLATIONMEMORY_FREE, mainErr16ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr9ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6ASSERT_VIOLATIONMEMORY_FREE, mainErr7ASSERT_VIOLATIONMEMORY_FREE]=== [2020-11-29 23:18:59,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:18:59,488 INFO L82 PathProgramCache]: Analyzing trace with hash -2134408578, now seen corresponding path program 1 times [2020-11-29 23:18:59,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:18:59,488 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591197304] [2020-11-29 23:18:59,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:18:59,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:18:59,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 23:18:59,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:18:59,579 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:18:59,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591197304] [2020-11-29 23:18:59,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226872043] [2020-11-29 23:18:59,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_22a226a4-ab17-4c18-ac4a-024e036908e8/bin/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 23:18:59,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:18:59,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-29 23:18:59,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 23:18:59,779 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:18:59,779 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-11-29 23:18:59,779 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2020-11-29 23:18:59,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239363203] [2020-11-29 23:18:59,780 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-29 23:18:59,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:18:59,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-29 23:18:59,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2020-11-29 23:18:59,780 INFO L87 Difference]: Start difference. First operand 71 states and 77 transitions. Second operand 5 states. [2020-11-29 23:18:59,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:18:59,828 INFO L93 Difference]: Finished difference Result 97 states and 101 transitions. [2020-11-29 23:18:59,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-29 23:18:59,829 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-11-29 23:18:59,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:18:59,830 INFO L225 Difference]: With dead ends: 97 [2020-11-29 23:18:59,830 INFO L226 Difference]: Without dead ends: 97 [2020-11-29 23:18:59,830 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2020-11-29 23:18:59,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-11-29 23:18:59,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 70. [2020-11-29 23:18:59,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-11-29 23:18:59,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 74 transitions. [2020-11-29 23:18:59,842 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 74 transitions. Word has length 18 [2020-11-29 23:18:59,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:18:59,842 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 74 transitions. [2020-11-29 23:18:59,842 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-29 23:18:59,842 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 74 transitions. [2020-11-29 23:18:59,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-11-29 23:18:59,843 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:18:59,843 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 23:19:00,075 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 23:19:00,076 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, fooErr1REQUIRES_VIOLATION, fooErr0REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, fooErr3REQUIRES_VIOLATION, mainErr14ASSERT_VIOLATIONMEMORY_FREE, mainErr13ASSERT_VIOLATIONMEMORY_FREE, mainErr12ASSERT_VIOLATIONMEMORY_FREE, mainErr15ASSERT_VIOLATIONMEMORY_FREE, mainErr2REQUIRES_VIOLATION, mainErr10ASSERT_VIOLATIONMEMORY_FREE, mainErr3REQUIRES_VIOLATION, mainErr11ASSERT_VIOLATIONMEMORY_FREE, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr8ASSERT_VIOLATIONMEMORY_FREE, mainErr16ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr9ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6ASSERT_VIOLATIONMEMORY_FREE, mainErr7ASSERT_VIOLATIONMEMORY_FREE]=== [2020-11-29 23:19:00,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:19:00,076 INFO L82 PathProgramCache]: Analyzing trace with hash -1700324605, now seen corresponding path program 1 times [2020-11-29 23:19:00,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:19:00,077 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636523679] [2020-11-29 23:19:00,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:19:00,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:19:00,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 23:19:00,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:19:00,243 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:19:00,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636523679] [2020-11-29 23:19:00,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963664638] [2020-11-29 23:19:00,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_22a226a4-ab17-4c18-ac4a-024e036908e8/bin/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 23:19:00,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:19:00,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 16 conjunts are in the unsatisfiable core [2020-11-29 23:19:00,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 23:19:00,439 INFO L350 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2020-11-29 23:19:00,440 INFO L384 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 [2020-11-29 23:19:00,440 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 23:19:00,450 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 23:19:00,454 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-11-29 23:19:00,454 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:20, output treesize:35 [2020-11-29 23:19:00,561 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:19:00,562 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 23:19:00,562 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2020-11-29 23:19:00,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040927342] [2020-11-29 23:19:00,562 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-29 23:19:00,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:19:00,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-29 23:19:00,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-11-29 23:19:00,563 INFO L87 Difference]: Start difference. First operand 70 states and 74 transitions. Second operand 12 states. [2020-11-29 23:19:01,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:19:01,237 INFO L93 Difference]: Finished difference Result 112 states and 117 transitions. [2020-11-29 23:19:01,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-29 23:19:01,237 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 20 [2020-11-29 23:19:01,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:19:01,239 INFO L225 Difference]: With dead ends: 112 [2020-11-29 23:19:01,240 INFO L226 Difference]: Without dead ends: 112 [2020-11-29 23:19:01,240 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-11-29 23:19:01,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-11-29 23:19:01,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 73. [2020-11-29 23:19:01,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-11-29 23:19:01,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 77 transitions. [2020-11-29 23:19:01,249 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 77 transitions. Word has length 20 [2020-11-29 23:19:01,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:19:01,249 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 77 transitions. [2020-11-29 23:19:01,249 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-29 23:19:01,249 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 77 transitions. [2020-11-29 23:19:01,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-11-29 23:19:01,250 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:19:01,250 INFO L422 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] [2020-11-29 23:19:01,465 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 23:19:01,465 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, fooErr1REQUIRES_VIOLATION, fooErr0REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, fooErr3REQUIRES_VIOLATION, mainErr14ASSERT_VIOLATIONMEMORY_FREE, mainErr13ASSERT_VIOLATIONMEMORY_FREE, mainErr12ASSERT_VIOLATIONMEMORY_FREE, mainErr15ASSERT_VIOLATIONMEMORY_FREE, mainErr2REQUIRES_VIOLATION, mainErr10ASSERT_VIOLATIONMEMORY_FREE, mainErr3REQUIRES_VIOLATION, mainErr11ASSERT_VIOLATIONMEMORY_FREE, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr8ASSERT_VIOLATIONMEMORY_FREE, mainErr16ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr9ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6ASSERT_VIOLATIONMEMORY_FREE, mainErr7ASSERT_VIOLATIONMEMORY_FREE]=== [2020-11-29 23:19:01,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:19:01,466 INFO L82 PathProgramCache]: Analyzing trace with hash -247582013, now seen corresponding path program 1 times [2020-11-29 23:19:01,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:19:01,466 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081197729] [2020-11-29 23:19:01,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:19:01,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:19:01,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 23:19:01,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:19:01,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-11-29 23:19:01,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:19:01,558 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-29 23:19:01,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081197729] [2020-11-29 23:19:01,559 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 23:19:01,559 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-29 23:19:01,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143032860] [2020-11-29 23:19:01,560 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-29 23:19:01,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:19:01,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-29 23:19:01,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-29 23:19:01,560 INFO L87 Difference]: Start difference. First operand 73 states and 77 transitions. Second operand 6 states. [2020-11-29 23:19:01,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:19:01,846 INFO L93 Difference]: Finished difference Result 71 states and 75 transitions. [2020-11-29 23:19:01,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-29 23:19:01,846 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2020-11-29 23:19:01,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:19:01,847 INFO L225 Difference]: With dead ends: 71 [2020-11-29 23:19:01,847 INFO L226 Difference]: Without dead ends: 71 [2020-11-29 23:19:01,847 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-11-29 23:19:01,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-11-29 23:19:01,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2020-11-29 23:19:01,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-11-29 23:19:01,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 75 transitions. [2020-11-29 23:19:01,853 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 75 transitions. Word has length 22 [2020-11-29 23:19:01,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:19:01,854 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 75 transitions. [2020-11-29 23:19:01,854 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-29 23:19:01,854 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 75 transitions. [2020-11-29 23:19:01,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-11-29 23:19:01,855 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:19:01,855 INFO L422 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] [2020-11-29 23:19:01,855 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-11-29 23:19:01,855 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, fooErr1REQUIRES_VIOLATION, fooErr0REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, fooErr3REQUIRES_VIOLATION, mainErr14ASSERT_VIOLATIONMEMORY_FREE, mainErr13ASSERT_VIOLATIONMEMORY_FREE, mainErr12ASSERT_VIOLATIONMEMORY_FREE, mainErr15ASSERT_VIOLATIONMEMORY_FREE, mainErr2REQUIRES_VIOLATION, mainErr10ASSERT_VIOLATIONMEMORY_FREE, mainErr3REQUIRES_VIOLATION, mainErr11ASSERT_VIOLATIONMEMORY_FREE, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr8ASSERT_VIOLATIONMEMORY_FREE, mainErr16ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr9ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6ASSERT_VIOLATIONMEMORY_FREE, mainErr7ASSERT_VIOLATIONMEMORY_FREE]=== [2020-11-29 23:19:01,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:19:01,856 INFO L82 PathProgramCache]: Analyzing trace with hash -247582012, now seen corresponding path program 1 times [2020-11-29 23:19:01,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:19:01,856 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658084098] [2020-11-29 23:19:01,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:19:01,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 23:19:01,872 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 23:19:01,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 23:19:01,895 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 23:19:01,937 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 23:19:01,938 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-29 23:19:01,938 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-11-29 23:19:01,993 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.11 11:19:01 BoogieIcfgContainer [2020-11-29 23:19:01,996 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-29 23:19:01,997 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-29 23:19:01,997 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-29 23:19:01,998 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-29 23:19:01,998 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 11:18:55" (3/4) ... [2020-11-29 23:19:02,000 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-29 23:19:02,067 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_22a226a4-ab17-4c18-ac4a-024e036908e8/bin/uautomizer/witness.graphml [2020-11-29 23:19:02,067 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-29 23:19:02,073 INFO L168 Benchmark]: Toolchain (without parser) took 8329.13 ms. Allocated memory was 94.4 MB in the beginning and 144.7 MB in the end (delta: 50.3 MB). Free memory was 38.8 MB in the beginning and 111.9 MB in the end (delta: -73.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 23:19:02,073 INFO L168 Benchmark]: CDTParser took 0.54 ms. Allocated memory is still 94.4 MB. Free memory is still 57.0 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 23:19:02,074 INFO L168 Benchmark]: CACSL2BoogieTranslator took 481.73 ms. Allocated memory is still 94.4 MB. Free memory was 38.7 MB in the beginning and 59.4 MB in the end (delta: -20.7 MB). Peak memory consumption was 7.7 MB. Max. memory is 16.1 GB. [2020-11-29 23:19:02,074 INFO L168 Benchmark]: Boogie Preprocessor took 101.43 ms. Allocated memory is still 94.4 MB. Free memory was 59.4 MB in the beginning and 56.9 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 23:19:02,075 INFO L168 Benchmark]: RCFGBuilder took 687.37 ms. Allocated memory is still 94.4 MB. Free memory was 56.9 MB in the beginning and 48.5 MB in the end (delta: 8.4 MB). Peak memory consumption was 25.4 MB. Max. memory is 16.1 GB. [2020-11-29 23:19:02,075 INFO L168 Benchmark]: TraceAbstraction took 6982.64 ms. Allocated memory was 94.4 MB in the beginning and 144.7 MB in the end (delta: 50.3 MB). Free memory was 48.5 MB in the beginning and 114.0 MB in the end (delta: -65.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 23:19:02,077 INFO L168 Benchmark]: Witness Printer took 70.18 ms. Allocated memory is still 144.7 MB. Free memory was 114.0 MB in the beginning and 111.9 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 23:19:02,079 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.54 ms. Allocated memory is still 94.4 MB. Free memory is still 57.0 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 481.73 ms. Allocated memory is still 94.4 MB. Free memory was 38.7 MB in the beginning and 59.4 MB in the end (delta: -20.7 MB). Peak memory consumption was 7.7 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 101.43 ms. Allocated memory is still 94.4 MB. Free memory was 59.4 MB in the beginning and 56.9 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 687.37 ms. Allocated memory is still 94.4 MB. Free memory was 56.9 MB in the beginning and 48.5 MB in the end (delta: 8.4 MB). Peak memory consumption was 25.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 6982.64 ms. Allocated memory was 94.4 MB in the beginning and 144.7 MB in the end (delta: 50.3 MB). Free memory was 48.5 MB in the beginning and 114.0 MB in the end (delta: -65.5 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 70.18 ms. Allocated memory is still 144.7 MB. Free memory was 114.0 MB in the beginning and 111.9 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 544]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L523] int *a, *b; [L524] int n; VAL [\old(a)=56, \old(a)=53, \old(b)=50, \old(b)=57, \old(n)=55, 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={-1:0}, b={-2:4}, b++={-2:0}, malloc(n * sizeof(*a))={-1:0}, malloc(n * sizeof(*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={-1:0}, b={-2:4}, b++={-2:0}, malloc(n * sizeof(*a))={-1:0}, malloc(n * sizeof(*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={-1:0}, 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={-1:0}, 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={-1:0}, b={-2:4}, i=0, n=1] [L530] a[i] = n VAL [\old(a)=0, \old(a)=0, \old(b)=0, \old(b)=0, \old(n)=0, a={-1:0}, 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={-1:0}, 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={-1:0}, 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={-1:0}, 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={-1:0}, 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={-1:0}, b={-2:4}, malloc(n * sizeof(*a))={-1:0}, malloc(n * sizeof(*b))={-2:0}, n=1] [L544] b[-2] - StatisticsResult: Ultimate Automizer benchmark data CFG has 10 procedures, 82 locations, 22 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 6.8s, OverallIterations: 11, TraceHistogramMax: 2, AutomataDifference: 2.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 558 SDtfs, 836 SDslu, 760 SDs, 0 SdLazy, 1083 SolverSat, 85 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 143 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 1.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=74occurred in iteration=6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 10 MinimizatonAttempts, 222 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 1.8s InterpolantComputationTime, 237 NumberOfCodeBlocks, 237 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 201 ConstructedInterpolants, 0 QuantifiedInterpolants, 21313 SizeOfPredicates, 16 NumberOfNonLiveVariables, 650 ConjunctsInSsa, 44 ConjunctsInUnsatCore, 14 InterpolantComputations, 9 PerfectInterpolantSequences, 10/21 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...