./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/verifythis/elimination_max_rec_onepoint.c --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_765bcf05-75f1-4bbc-be34-8bd7dc89decb/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_765bcf05-75f1-4bbc-be34-8bd7dc89decb/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_765bcf05-75f1-4bbc-be34-8bd7dc89decb/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_765bcf05-75f1-4bbc-be34-8bd7dc89decb/bin/uautomizer/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/verifythis/elimination_max_rec_onepoint.c -s /tmp/vcloud-vcloud-master/worker/run_dir_765bcf05-75f1-4bbc-be34-8bd7dc89decb/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_765bcf05-75f1-4bbc-be34-8bd7dc89decb/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 4099afe4d4ae3c88800047494721799286636d7a ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-29 20:54:27,890 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-29 20:54:27,902 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-29 20:54:27,954 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-29 20:54:27,955 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-29 20:54:27,960 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-29 20:54:27,962 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-29 20:54:27,966 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-29 20:54:27,969 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-29 20:54:27,974 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-29 20:54:27,975 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-29 20:54:27,977 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-29 20:54:27,978 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-29 20:54:27,981 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-29 20:54:27,983 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-29 20:54:27,985 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-29 20:54:27,986 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-29 20:54:27,989 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-29 20:54:27,992 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-29 20:54:27,997 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-29 20:54:27,999 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-29 20:54:28,001 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-29 20:54:28,002 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-29 20:54:28,003 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-29 20:54:28,006 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-29 20:54:28,006 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-29 20:54:28,007 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-29 20:54:28,008 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-29 20:54:28,008 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-29 20:54:28,010 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-29 20:54:28,010 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-29 20:54:28,011 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-29 20:54:28,012 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-29 20:54:28,013 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-29 20:54:28,014 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-29 20:54:28,014 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-29 20:54:28,015 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-29 20:54:28,015 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-29 20:54:28,015 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-29 20:54:28,016 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-29 20:54:28,017 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-29 20:54:28,018 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_765bcf05-75f1-4bbc-be34-8bd7dc89decb/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2020-11-29 20:54:28,041 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-29 20:54:28,041 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-29 20:54:28,043 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-29 20:54:28,043 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-29 20:54:28,043 INFO L138 SettingsManager]: * Use SBE=true [2020-11-29 20:54:28,043 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-29 20:54:28,044 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-29 20:54:28,044 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-11-29 20:54:28,044 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-29 20:54:28,044 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-29 20:54:28,044 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-29 20:54:28,045 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-11-29 20:54:28,045 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-11-29 20:54:28,045 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-11-29 20:54:28,045 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-29 20:54:28,046 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-29 20:54:28,046 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-29 20:54:28,046 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-29 20:54:28,046 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-29 20:54:28,046 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-29 20:54:28,047 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-29 20:54:28,047 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-29 20:54:28,047 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-29 20:54:28,047 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-29 20:54:28,048 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-29 20:54:28,048 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-29 20:54:28,048 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-29 20:54:28,048 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-29 20:54:28,048 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_765bcf05-75f1-4bbc-be34-8bd7dc89decb/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_765bcf05-75f1-4bbc-be34-8bd7dc89decb/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4099afe4d4ae3c88800047494721799286636d7a [2020-11-29 20:54:28,294 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-29 20:54:28,327 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-29 20:54:28,331 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-29 20:54:28,332 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-29 20:54:28,333 INFO L275 PluginConnector]: CDTParser initialized [2020-11-29 20:54:28,335 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_765bcf05-75f1-4bbc-be34-8bd7dc89decb/bin/uautomizer/../../sv-benchmarks/c/verifythis/elimination_max_rec_onepoint.c [2020-11-29 20:54:28,434 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_765bcf05-75f1-4bbc-be34-8bd7dc89decb/bin/uautomizer/data/93da5c858/c7052a329c33484ca1dc5b1edf3a991a/FLAGfb65a1ac9 [2020-11-29 20:54:28,953 INFO L306 CDTParser]: Found 1 translation units. [2020-11-29 20:54:28,954 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_765bcf05-75f1-4bbc-be34-8bd7dc89decb/sv-benchmarks/c/verifythis/elimination_max_rec_onepoint.c [2020-11-29 20:54:28,960 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_765bcf05-75f1-4bbc-be34-8bd7dc89decb/bin/uautomizer/data/93da5c858/c7052a329c33484ca1dc5b1edf3a991a/FLAGfb65a1ac9 [2020-11-29 20:54:29,319 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_765bcf05-75f1-4bbc-be34-8bd7dc89decb/bin/uautomizer/data/93da5c858/c7052a329c33484ca1dc5b1edf3a991a [2020-11-29 20:54:29,322 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-29 20:54:29,323 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-11-29 20:54:29,333 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-29 20:54:29,334 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-29 20:54:29,337 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-29 20:54:29,338 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 08:54:29" (1/1) ... [2020-11-29 20:54:29,341 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1038e7ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:54:29, skipping insertion in model container [2020-11-29 20:54:29,342 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 08:54:29" (1/1) ... [2020-11-29 20:54:29,349 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-29 20:54:29,368 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-29 20:54:29,545 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 20:54:29,559 INFO L203 MainTranslator]: Completed pre-run [2020-11-29 20:54:29,580 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 20:54:29,601 INFO L208 MainTranslator]: Completed translation [2020-11-29 20:54:29,601 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:54:29 WrapperNode [2020-11-29 20:54:29,602 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-29 20:54:29,603 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-29 20:54:29,603 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-29 20:54:29,603 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-29 20:54:29,614 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:54:29" (1/1) ... [2020-11-29 20:54:29,614 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:54:29" (1/1) ... [2020-11-29 20:54:29,621 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:54:29" (1/1) ... [2020-11-29 20:54:29,621 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:54:29" (1/1) ... [2020-11-29 20:54:29,630 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:54:29" (1/1) ... [2020-11-29 20:54:29,632 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:54:29" (1/1) ... [2020-11-29 20:54:29,634 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:54:29" (1/1) ... [2020-11-29 20:54:29,636 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-29 20:54:29,637 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-29 20:54:29,638 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-29 20:54:29,638 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-29 20:54:29,639 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:54:29" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_765bcf05-75f1-4bbc-be34-8bd7dc89decb/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 20:54:29,702 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-29 20:54:29,703 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-29 20:54:29,703 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-29 20:54:29,703 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-11-29 20:54:29,703 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-11-29 20:54:29,703 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2020-11-29 20:54:29,704 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-29 20:54:29,704 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2020-11-29 20:54:29,704 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-11-29 20:54:29,704 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-11-29 20:54:29,705 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-29 20:54:29,705 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-29 20:54:29,705 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-29 20:54:29,705 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-29 20:54:29,706 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-11-29 20:54:29,706 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-11-29 20:54:29,706 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-11-29 20:54:29,706 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-11-29 20:54:29,707 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-29 20:54:29,707 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-29 20:54:29,707 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-11-29 20:54:29,707 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2020-11-29 20:54:29,708 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-29 20:54:29,708 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-29 20:54:29,708 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-29 20:54:29,708 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-29 20:54:29,708 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-29 20:54:30,193 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-29 20:54:30,194 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-11-29 20:54:30,195 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 08:54:30 BoogieIcfgContainer [2020-11-29 20:54:30,195 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-29 20:54:30,197 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-29 20:54:30,197 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-29 20:54:30,201 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-29 20:54:30,201 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 08:54:29" (1/3) ... [2020-11-29 20:54:30,202 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44069d6f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 08:54:30, skipping insertion in model container [2020-11-29 20:54:30,202 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:54:29" (2/3) ... [2020-11-29 20:54:30,202 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44069d6f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 08:54:30, skipping insertion in model container [2020-11-29 20:54:30,202 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 08:54:30" (3/3) ... [2020-11-29 20:54:30,203 INFO L111 eAbstractionObserver]: Analyzing ICFG elimination_max_rec_onepoint.c [2020-11-29 20:54:30,214 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-29 20:54:30,218 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 17 error locations. [2020-11-29 20:54:30,232 INFO L253 AbstractCegarLoop]: Starting to check reachability of 17 error locations. [2020-11-29 20:54:30,265 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-29 20:54:30,266 INFO L378 AbstractCegarLoop]: Hoare is false [2020-11-29 20:54:30,266 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-29 20:54:30,266 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-29 20:54:30,266 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-29 20:54:30,266 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-29 20:54:30,267 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-29 20:54:30,267 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-29 20:54:30,284 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states. [2020-11-29 20:54:30,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-11-29 20:54:30,292 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:54:30,293 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:54:30,293 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr2REQUIRES_VIOLATION, mainErr7ENSURES_VIOLATIONMEMORY_LEAK, mainErr3REQUIRES_VIOLATION, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6ASSERT_VIOLATIONMEMORY_FREE, checkErr2REQUIRES_VIOLATION, checkErr3REQUIRES_VIOLATION, checkErr4REQUIRES_VIOLATION, checkErr5REQUIRES_VIOLATION, checkErr0REQUIRES_VIOLATION, checkErr6REQUIRES_VIOLATION, checkErr1REQUIRES_VIOLATION, checkErr7REQUIRES_VIOLATION]=== [2020-11-29 20:54:30,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:54:30,300 INFO L82 PathProgramCache]: Analyzing trace with hash 1996949854, now seen corresponding path program 1 times [2020-11-29 20:54:30,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:54:30,310 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810952471] [2020-11-29 20:54:30,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:54:30,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:54:30,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 20:54:30,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:54:30,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-29 20:54:30,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:54:30,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-11-29 20:54:30,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:54:30,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-11-29 20:54:30,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:54:30,618 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-11-29 20:54:30,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810952471] [2020-11-29 20:54:30,626 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 20:54:30,626 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-29 20:54:30,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497369738] [2020-11-29 20:54:30,630 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-29 20:54:30,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:54:30,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 20:54:30,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-29 20:54:30,642 INFO L87 Difference]: Start difference. First operand 77 states. Second operand 4 states. [2020-11-29 20:54:30,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:54:30,941 INFO L93 Difference]: Finished difference Result 74 states and 80 transitions. [2020-11-29 20:54:30,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-29 20:54:30,944 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 31 [2020-11-29 20:54:30,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:54:30,960 INFO L225 Difference]: With dead ends: 74 [2020-11-29 20:54:30,962 INFO L226 Difference]: Without dead ends: 71 [2020-11-29 20:54:30,964 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 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 20:54:30,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-11-29 20:54:31,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2020-11-29 20:54:31,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-11-29 20:54:31,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 77 transitions. [2020-11-29 20:54:31,023 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 77 transitions. Word has length 31 [2020-11-29 20:54:31,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:54:31,024 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 77 transitions. [2020-11-29 20:54:31,024 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-29 20:54:31,024 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 77 transitions. [2020-11-29 20:54:31,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-11-29 20:54:31,027 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:54:31,028 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:54:31,029 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-29 20:54:31,029 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr2REQUIRES_VIOLATION, mainErr7ENSURES_VIOLATIONMEMORY_LEAK, mainErr3REQUIRES_VIOLATION, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6ASSERT_VIOLATIONMEMORY_FREE, checkErr2REQUIRES_VIOLATION, checkErr3REQUIRES_VIOLATION, checkErr4REQUIRES_VIOLATION, checkErr5REQUIRES_VIOLATION, checkErr0REQUIRES_VIOLATION, checkErr6REQUIRES_VIOLATION, checkErr1REQUIRES_VIOLATION, checkErr7REQUIRES_VIOLATION]=== [2020-11-29 20:54:31,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:54:31,030 INFO L82 PathProgramCache]: Analyzing trace with hash -1396836382, now seen corresponding path program 1 times [2020-11-29 20:54:31,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:54:31,031 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498274449] [2020-11-29 20:54:31,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:54:31,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:54:31,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 20:54:31,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:54:31,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-29 20:54:31,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:54:31,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-11-29 20:54:31,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:54:31,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-11-29 20:54:31,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:54:31,375 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-11-29 20:54:31,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498274449] [2020-11-29 20:54:31,376 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 20:54:31,376 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-11-29 20:54:31,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872232991] [2020-11-29 20:54:31,378 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-29 20:54:31,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:54:31,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-29 20:54:31,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-11-29 20:54:31,380 INFO L87 Difference]: Start difference. First operand 71 states and 77 transitions. Second operand 8 states. [2020-11-29 20:54:32,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:54:32,263 INFO L93 Difference]: Finished difference Result 115 states and 128 transitions. [2020-11-29 20:54:32,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-29 20:54:32,264 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2020-11-29 20:54:32,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:54:32,267 INFO L225 Difference]: With dead ends: 115 [2020-11-29 20:54:32,267 INFO L226 Difference]: Without dead ends: 115 [2020-11-29 20:54:32,268 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2020-11-29 20:54:32,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-11-29 20:54:32,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 94. [2020-11-29 20:54:32,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-11-29 20:54:32,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 113 transitions. [2020-11-29 20:54:32,283 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 113 transitions. Word has length 31 [2020-11-29 20:54:32,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:54:32,284 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 113 transitions. [2020-11-29 20:54:32,284 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-29 20:54:32,284 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 113 transitions. [2020-11-29 20:54:32,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-11-29 20:54:32,285 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:54:32,285 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 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 20:54:32,285 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-29 20:54:32,286 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr2REQUIRES_VIOLATION, mainErr7ENSURES_VIOLATIONMEMORY_LEAK, mainErr3REQUIRES_VIOLATION, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6ASSERT_VIOLATIONMEMORY_FREE, checkErr2REQUIRES_VIOLATION, checkErr3REQUIRES_VIOLATION, checkErr4REQUIRES_VIOLATION, checkErr5REQUIRES_VIOLATION, checkErr0REQUIRES_VIOLATION, checkErr6REQUIRES_VIOLATION, checkErr1REQUIRES_VIOLATION, checkErr7REQUIRES_VIOLATION]=== [2020-11-29 20:54:32,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:54:32,286 INFO L82 PathProgramCache]: Analyzing trace with hash 91746767, now seen corresponding path program 1 times [2020-11-29 20:54:32,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:54:32,287 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848015411] [2020-11-29 20:54:32,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:54:32,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:54:32,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 20:54:32,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:54:32,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-29 20:54:32,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:54:32,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-11-29 20:54:32,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:54:32,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-11-29 20:54:32,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:54:32,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-11-29 20:54:32,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:54:32,432 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-11-29 20:54:32,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848015411] [2020-11-29 20:54:32,433 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 20:54:32,433 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-29 20:54:32,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783127076] [2020-11-29 20:54:32,433 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-29 20:54:32,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:54:32,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-29 20:54:32,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-29 20:54:32,434 INFO L87 Difference]: Start difference. First operand 94 states and 113 transitions. Second operand 6 states. [2020-11-29 20:54:32,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:54:32,838 INFO L93 Difference]: Finished difference Result 91 states and 110 transitions. [2020-11-29 20:54:32,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-29 20:54:32,838 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 30 [2020-11-29 20:54:32,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:54:32,840 INFO L225 Difference]: With dead ends: 91 [2020-11-29 20:54:32,840 INFO L226 Difference]: Without dead ends: 91 [2020-11-29 20:54:32,841 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-11-29 20:54:32,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-11-29 20:54:32,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2020-11-29 20:54:32,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-11-29 20:54:32,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 110 transitions. [2020-11-29 20:54:32,852 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 110 transitions. Word has length 30 [2020-11-29 20:54:32,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:54:32,853 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 110 transitions. [2020-11-29 20:54:32,853 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-29 20:54:32,853 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 110 transitions. [2020-11-29 20:54:32,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-11-29 20:54:32,854 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:54:32,854 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 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 20:54:32,854 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-29 20:54:32,855 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr2REQUIRES_VIOLATION, mainErr7ENSURES_VIOLATIONMEMORY_LEAK, mainErr3REQUIRES_VIOLATION, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6ASSERT_VIOLATIONMEMORY_FREE, checkErr2REQUIRES_VIOLATION, checkErr3REQUIRES_VIOLATION, checkErr4REQUIRES_VIOLATION, checkErr5REQUIRES_VIOLATION, checkErr0REQUIRES_VIOLATION, checkErr6REQUIRES_VIOLATION, checkErr1REQUIRES_VIOLATION, checkErr7REQUIRES_VIOLATION]=== [2020-11-29 20:54:32,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:54:32,855 INFO L82 PathProgramCache]: Analyzing trace with hash 91746768, now seen corresponding path program 1 times [2020-11-29 20:54:32,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:54:32,856 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856867403] [2020-11-29 20:54:32,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:54:32,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:54:32,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 20:54:32,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:54:33,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-29 20:54:33,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:54:33,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-11-29 20:54:33,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:54:33,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-11-29 20:54:33,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:54:33,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-11-29 20:54:33,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:54:33,085 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-29 20:54:33,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856867403] [2020-11-29 20:54:33,085 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 20:54:33,085 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-11-29 20:54:33,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738053817] [2020-11-29 20:54:33,086 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-29 20:54:33,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:54:33,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-29 20:54:33,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-11-29 20:54:33,089 INFO L87 Difference]: Start difference. First operand 91 states and 110 transitions. Second operand 9 states. [2020-11-29 20:54:33,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:54:33,716 INFO L93 Difference]: Finished difference Result 89 states and 108 transitions. [2020-11-29 20:54:33,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-29 20:54:33,718 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 30 [2020-11-29 20:54:33,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:54:33,719 INFO L225 Difference]: With dead ends: 89 [2020-11-29 20:54:33,720 INFO L226 Difference]: Without dead ends: 89 [2020-11-29 20:54:33,720 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2020-11-29 20:54:33,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-11-29 20:54:33,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2020-11-29 20:54:33,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-11-29 20:54:33,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 108 transitions. [2020-11-29 20:54:33,729 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 108 transitions. Word has length 30 [2020-11-29 20:54:33,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:54:33,730 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 108 transitions. [2020-11-29 20:54:33,730 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-29 20:54:33,730 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 108 transitions. [2020-11-29 20:54:33,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-11-29 20:54:33,731 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:54:33,731 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:54:33,731 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-29 20:54:33,732 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr2REQUIRES_VIOLATION, mainErr7ENSURES_VIOLATIONMEMORY_LEAK, mainErr3REQUIRES_VIOLATION, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6ASSERT_VIOLATIONMEMORY_FREE, checkErr2REQUIRES_VIOLATION, checkErr3REQUIRES_VIOLATION, checkErr4REQUIRES_VIOLATION, checkErr5REQUIRES_VIOLATION, checkErr0REQUIRES_VIOLATION, checkErr6REQUIRES_VIOLATION, checkErr1REQUIRES_VIOLATION, checkErr7REQUIRES_VIOLATION]=== [2020-11-29 20:54:33,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:54:33,732 INFO L82 PathProgramCache]: Analyzing trace with hash -2025670351, now seen corresponding path program 1 times [2020-11-29 20:54:33,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:54:33,733 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127508861] [2020-11-29 20:54:33,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:54:33,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:54:33,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 20:54:33,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:54:33,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-29 20:54:33,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:54:33,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-11-29 20:54:33,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:54:33,915 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-11-29 20:54:33,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:54:33,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-11-29 20:54:33,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:54:33,967 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-11-29 20:54:33,967 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127508861] [2020-11-29 20:54:33,967 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 20:54:33,967 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-11-29 20:54:33,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047261324] [2020-11-29 20:54:33,968 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-29 20:54:33,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:54:33,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-29 20:54:33,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-11-29 20:54:33,969 INFO L87 Difference]: Start difference. First operand 89 states and 108 transitions. Second operand 11 states. [2020-11-29 20:54:34,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:54:34,665 INFO L93 Difference]: Finished difference Result 128 states and 160 transitions. [2020-11-29 20:54:34,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-29 20:54:34,671 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 32 [2020-11-29 20:54:34,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:54:34,673 INFO L225 Difference]: With dead ends: 128 [2020-11-29 20:54:34,673 INFO L226 Difference]: Without dead ends: 128 [2020-11-29 20:54:34,673 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2020-11-29 20:54:34,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-11-29 20:54:34,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 95. [2020-11-29 20:54:34,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-11-29 20:54:34,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 115 transitions. [2020-11-29 20:54:34,688 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 115 transitions. Word has length 32 [2020-11-29 20:54:34,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:54:34,691 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 115 transitions. [2020-11-29 20:54:34,691 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-29 20:54:34,691 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 115 transitions. [2020-11-29 20:54:34,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-11-29 20:54:34,694 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:54:34,694 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:54:34,694 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-29 20:54:34,695 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr2REQUIRES_VIOLATION, mainErr7ENSURES_VIOLATIONMEMORY_LEAK, mainErr3REQUIRES_VIOLATION, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6ASSERT_VIOLATIONMEMORY_FREE, checkErr2REQUIRES_VIOLATION, checkErr3REQUIRES_VIOLATION, checkErr4REQUIRES_VIOLATION, checkErr5REQUIRES_VIOLATION, checkErr0REQUIRES_VIOLATION, checkErr6REQUIRES_VIOLATION, checkErr1REQUIRES_VIOLATION, checkErr7REQUIRES_VIOLATION]=== [2020-11-29 20:54:34,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:54:34,695 INFO L82 PathProgramCache]: Analyzing trace with hash -666258071, now seen corresponding path program 1 times [2020-11-29 20:54:34,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:54:34,696 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954038955] [2020-11-29 20:54:34,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:54:34,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:54:34,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 20:54:34,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:54:34,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-29 20:54:34,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:54:34,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-11-29 20:54:34,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:54:34,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-11-29 20:54:34,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:54:34,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-11-29 20:54:34,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:54:34,985 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-11-29 20:54:34,985 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954038955] [2020-11-29 20:54:34,987 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 20:54:34,988 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-11-29 20:54:34,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814063478] [2020-11-29 20:54:34,988 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-29 20:54:34,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:54:34,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-29 20:54:34,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2020-11-29 20:54:34,990 INFO L87 Difference]: Start difference. First operand 95 states and 115 transitions. Second operand 13 states. [2020-11-29 20:54:35,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:54:35,665 INFO L93 Difference]: Finished difference Result 99 states and 118 transitions. [2020-11-29 20:54:35,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-11-29 20:54:35,666 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 38 [2020-11-29 20:54:35,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:54:35,667 INFO L225 Difference]: With dead ends: 99 [2020-11-29 20:54:35,667 INFO L226 Difference]: Without dead ends: 99 [2020-11-29 20:54:35,668 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2020-11-29 20:54:35,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-11-29 20:54:35,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2020-11-29 20:54:35,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-11-29 20:54:35,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 118 transitions. [2020-11-29 20:54:35,676 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 118 transitions. Word has length 38 [2020-11-29 20:54:35,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:54:35,677 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 118 transitions. [2020-11-29 20:54:35,677 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-11-29 20:54:35,677 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 118 transitions. [2020-11-29 20:54:35,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-11-29 20:54:35,678 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:54:35,678 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:54:35,678 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-29 20:54:35,679 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr2REQUIRES_VIOLATION, mainErr7ENSURES_VIOLATIONMEMORY_LEAK, mainErr3REQUIRES_VIOLATION, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6ASSERT_VIOLATIONMEMORY_FREE, checkErr2REQUIRES_VIOLATION, checkErr3REQUIRES_VIOLATION, checkErr4REQUIRES_VIOLATION, checkErr5REQUIRES_VIOLATION, checkErr0REQUIRES_VIOLATION, checkErr6REQUIRES_VIOLATION, checkErr1REQUIRES_VIOLATION, checkErr7REQUIRES_VIOLATION]=== [2020-11-29 20:54:35,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:54:35,679 INFO L82 PathProgramCache]: Analyzing trace with hash -2130699965, now seen corresponding path program 1 times [2020-11-29 20:54:35,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:54:35,680 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089693016] [2020-11-29 20:54:35,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:54:35,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:54:35,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 20:54:35,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:54:35,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-29 20:54:35,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:54:35,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-11-29 20:54:35,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:54:35,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-11-29 20:54:35,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:54:35,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-11-29 20:54:35,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:54:35,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-11-29 20:54:35,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:54:35,825 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-11-29 20:54:35,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089693016] [2020-11-29 20:54:35,826 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 20:54:35,826 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-11-29 20:54:35,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439006283] [2020-11-29 20:54:35,827 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-29 20:54:35,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:54:35,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-29 20:54:35,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-11-29 20:54:35,828 INFO L87 Difference]: Start difference. First operand 99 states and 118 transitions. Second operand 8 states. [2020-11-29 20:54:36,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:54:36,191 INFO L93 Difference]: Finished difference Result 95 states and 110 transitions. [2020-11-29 20:54:36,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-29 20:54:36,196 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 38 [2020-11-29 20:54:36,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:54:36,198 INFO L225 Difference]: With dead ends: 95 [2020-11-29 20:54:36,198 INFO L226 Difference]: Without dead ends: 95 [2020-11-29 20:54:36,198 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-11-29 20:54:36,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-11-29 20:54:36,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2020-11-29 20:54:36,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-11-29 20:54:36,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 110 transitions. [2020-11-29 20:54:36,206 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 110 transitions. Word has length 38 [2020-11-29 20:54:36,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:54:36,207 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 110 transitions. [2020-11-29 20:54:36,207 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-29 20:54:36,207 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 110 transitions. [2020-11-29 20:54:36,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-11-29 20:54:36,210 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:54:36,210 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:54:36,211 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-11-29 20:54:36,211 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr2REQUIRES_VIOLATION, mainErr7ENSURES_VIOLATIONMEMORY_LEAK, mainErr3REQUIRES_VIOLATION, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6ASSERT_VIOLATIONMEMORY_FREE, checkErr2REQUIRES_VIOLATION, checkErr3REQUIRES_VIOLATION, checkErr4REQUIRES_VIOLATION, checkErr5REQUIRES_VIOLATION, checkErr0REQUIRES_VIOLATION, checkErr6REQUIRES_VIOLATION, checkErr1REQUIRES_VIOLATION, checkErr7REQUIRES_VIOLATION]=== [2020-11-29 20:54:36,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:54:36,211 INFO L82 PathProgramCache]: Analyzing trace with hash -2130699964, now seen corresponding path program 1 times [2020-11-29 20:54:36,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:54:36,212 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231315992] [2020-11-29 20:54:36,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:54:36,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:54:36,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 20:54:36,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:54:36,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-29 20:54:36,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:54:36,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-11-29 20:54:36,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:54:36,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-11-29 20:54:36,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:54:36,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-11-29 20:54:36,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:54:36,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-11-29 20:54:36,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:54:36,405 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-11-29 20:54:36,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231315992] [2020-11-29 20:54:36,406 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 20:54:36,406 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-11-29 20:54:36,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955236990] [2020-11-29 20:54:36,409 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-29 20:54:36,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:54:36,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-29 20:54:36,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-11-29 20:54:36,420 INFO L87 Difference]: Start difference. First operand 95 states and 110 transitions. Second operand 9 states. [2020-11-29 20:54:37,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:54:37,194 INFO L93 Difference]: Finished difference Result 109 states and 122 transitions. [2020-11-29 20:54:37,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-29 20:54:37,195 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 38 [2020-11-29 20:54:37,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:54:37,196 INFO L225 Difference]: With dead ends: 109 [2020-11-29 20:54:37,196 INFO L226 Difference]: Without dead ends: 109 [2020-11-29 20:54:37,197 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-11-29 20:54:37,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-11-29 20:54:37,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 95. [2020-11-29 20:54:37,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-11-29 20:54:37,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 109 transitions. [2020-11-29 20:54:37,204 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 109 transitions. Word has length 38 [2020-11-29 20:54:37,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:54:37,204 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 109 transitions. [2020-11-29 20:54:37,204 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-29 20:54:37,204 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 109 transitions. [2020-11-29 20:54:37,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-11-29 20:54:37,205 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:54:37,205 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:54:37,205 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-11-29 20:54:37,206 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr2REQUIRES_VIOLATION, mainErr7ENSURES_VIOLATIONMEMORY_LEAK, mainErr3REQUIRES_VIOLATION, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6ASSERT_VIOLATIONMEMORY_FREE, checkErr2REQUIRES_VIOLATION, checkErr3REQUIRES_VIOLATION, checkErr4REQUIRES_VIOLATION, checkErr5REQUIRES_VIOLATION, checkErr0REQUIRES_VIOLATION, checkErr6REQUIRES_VIOLATION, checkErr1REQUIRES_VIOLATION, checkErr7REQUIRES_VIOLATION]=== [2020-11-29 20:54:37,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:54:37,206 INFO L82 PathProgramCache]: Analyzing trace with hash -1627189456, now seen corresponding path program 1 times [2020-11-29 20:54:37,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:54:37,206 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240568119] [2020-11-29 20:54:37,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:54:37,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:54:37,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 20:54:37,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:54:37,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-29 20:54:37,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:54:37,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-11-29 20:54:37,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:54:37,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-11-29 20:54:37,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:54:37,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-11-29 20:54:37,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:54:37,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-11-29 20:54:37,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:54:37,430 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-11-29 20:54:37,431 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240568119] [2020-11-29 20:54:37,431 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 20:54:37,431 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-11-29 20:54:37,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723937546] [2020-11-29 20:54:37,432 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-29 20:54:37,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:54:37,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-29 20:54:37,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-11-29 20:54:37,433 INFO L87 Difference]: Start difference. First operand 95 states and 109 transitions. Second operand 9 states. [2020-11-29 20:54:38,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:54:38,148 INFO L93 Difference]: Finished difference Result 108 states and 121 transitions. [2020-11-29 20:54:38,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-29 20:54:38,149 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 39 [2020-11-29 20:54:38,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:54:38,150 INFO L225 Difference]: With dead ends: 108 [2020-11-29 20:54:38,150 INFO L226 Difference]: Without dead ends: 108 [2020-11-29 20:54:38,151 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2020-11-29 20:54:38,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-11-29 20:54:38,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 95. [2020-11-29 20:54:38,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-11-29 20:54:38,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 108 transitions. [2020-11-29 20:54:38,158 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 108 transitions. Word has length 39 [2020-11-29 20:54:38,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:54:38,158 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 108 transitions. [2020-11-29 20:54:38,158 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-29 20:54:38,158 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 108 transitions. [2020-11-29 20:54:38,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-11-29 20:54:38,160 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:54:38,160 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:54:38,160 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-11-29 20:54:38,160 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr2REQUIRES_VIOLATION, mainErr7ENSURES_VIOLATIONMEMORY_LEAK, mainErr3REQUIRES_VIOLATION, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6ASSERT_VIOLATIONMEMORY_FREE, checkErr2REQUIRES_VIOLATION, checkErr3REQUIRES_VIOLATION, checkErr4REQUIRES_VIOLATION, checkErr5REQUIRES_VIOLATION, checkErr0REQUIRES_VIOLATION, checkErr6REQUIRES_VIOLATION, checkErr1REQUIRES_VIOLATION, checkErr7REQUIRES_VIOLATION]=== [2020-11-29 20:54:38,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:54:38,161 INFO L82 PathProgramCache]: Analyzing trace with hash -320836601, now seen corresponding path program 1 times [2020-11-29 20:54:38,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:54:38,161 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738776737] [2020-11-29 20:54:38,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:54:38,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:54:38,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 20:54:38,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:54:38,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-29 20:54:38,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:54:38,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-11-29 20:54:38,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:54:38,296 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-11-29 20:54:38,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:54:38,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-11-29 20:54:38,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:54:38,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-11-29 20:54:38,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:54:38,315 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-11-29 20:54:38,315 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738776737] [2020-11-29 20:54:38,315 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 20:54:38,316 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-29 20:54:38,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477163076] [2020-11-29 20:54:38,316 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-29 20:54:38,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:54:38,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-29 20:54:38,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-29 20:54:38,319 INFO L87 Difference]: Start difference. First operand 95 states and 108 transitions. Second operand 6 states. [2020-11-29 20:54:38,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:54:38,599 INFO L93 Difference]: Finished difference Result 94 states and 107 transitions. [2020-11-29 20:54:38,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-29 20:54:38,600 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 40 [2020-11-29 20:54:38,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:54:38,601 INFO L225 Difference]: With dead ends: 94 [2020-11-29 20:54:38,601 INFO L226 Difference]: Without dead ends: 94 [2020-11-29 20:54:38,602 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-11-29 20:54:38,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-11-29 20:54:38,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2020-11-29 20:54:38,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-11-29 20:54:38,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 107 transitions. [2020-11-29 20:54:38,615 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 107 transitions. Word has length 40 [2020-11-29 20:54:38,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:54:38,616 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 107 transitions. [2020-11-29 20:54:38,616 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-29 20:54:38,616 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 107 transitions. [2020-11-29 20:54:38,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-11-29 20:54:38,618 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:54:38,618 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:54:38,618 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-11-29 20:54:38,618 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr2REQUIRES_VIOLATION, mainErr7ENSURES_VIOLATIONMEMORY_LEAK, mainErr3REQUIRES_VIOLATION, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6ASSERT_VIOLATIONMEMORY_FREE, checkErr2REQUIRES_VIOLATION, checkErr3REQUIRES_VIOLATION, checkErr4REQUIRES_VIOLATION, checkErr5REQUIRES_VIOLATION, checkErr0REQUIRES_VIOLATION, checkErr6REQUIRES_VIOLATION, checkErr1REQUIRES_VIOLATION, checkErr7REQUIRES_VIOLATION]=== [2020-11-29 20:54:38,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:54:38,619 INFO L82 PathProgramCache]: Analyzing trace with hash 913673802, now seen corresponding path program 1 times [2020-11-29 20:54:38,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:54:38,619 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608203886] [2020-11-29 20:54:38,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:54:38,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:54:38,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 20:54:38,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:54:38,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-29 20:54:38,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:54:38,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-11-29 20:54:38,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:54:38,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-11-29 20:54:38,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:54:38,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-11-29 20:54:38,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:54:38,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-11-29 20:54:38,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:54:38,737 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-11-29 20:54:38,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608203886] [2020-11-29 20:54:38,737 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 20:54:38,737 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-29 20:54:38,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253730035] [2020-11-29 20:54:38,738 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-29 20:54:38,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:54:38,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-29 20:54:38,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-11-29 20:54:38,739 INFO L87 Difference]: Start difference. First operand 94 states and 107 transitions. Second operand 7 states. [2020-11-29 20:54:39,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:54:39,037 INFO L93 Difference]: Finished difference Result 93 states and 106 transitions. [2020-11-29 20:54:39,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-29 20:54:39,038 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 42 [2020-11-29 20:54:39,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:54:39,039 INFO L225 Difference]: With dead ends: 93 [2020-11-29 20:54:39,039 INFO L226 Difference]: Without dead ends: 79 [2020-11-29 20:54:39,039 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-11-29 20:54:39,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-11-29 20:54:39,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2020-11-29 20:54:39,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-11-29 20:54:39,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 91 transitions. [2020-11-29 20:54:39,044 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 91 transitions. Word has length 42 [2020-11-29 20:54:39,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:54:39,045 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 91 transitions. [2020-11-29 20:54:39,045 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-29 20:54:39,045 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 91 transitions. [2020-11-29 20:54:39,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-11-29 20:54:39,047 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:54:39,048 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:54:39,048 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-11-29 20:54:39,048 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr2REQUIRES_VIOLATION, mainErr7ENSURES_VIOLATIONMEMORY_LEAK, mainErr3REQUIRES_VIOLATION, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6ASSERT_VIOLATIONMEMORY_FREE, checkErr2REQUIRES_VIOLATION, checkErr3REQUIRES_VIOLATION, checkErr4REQUIRES_VIOLATION, checkErr5REQUIRES_VIOLATION, checkErr0REQUIRES_VIOLATION, checkErr6REQUIRES_VIOLATION, checkErr1REQUIRES_VIOLATION, checkErr7REQUIRES_VIOLATION]=== [2020-11-29 20:54:39,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:54:39,049 INFO L82 PathProgramCache]: Analyzing trace with hash 1709786965, now seen corresponding path program 1 times [2020-11-29 20:54:39,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:54:39,049 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025001861] [2020-11-29 20:54:39,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:54:39,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:54:39,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 20:54:39,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:54:39,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-29 20:54:39,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:54:39,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-11-29 20:54:39,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:54:39,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-11-29 20:54:39,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:54:39,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-11-29 20:54:39,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:54:39,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-11-29 20:54:39,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:54:39,234 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-11-29 20:54:39,238 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025001861] [2020-11-29 20:54:39,238 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131526632] [2020-11-29 20:54:39,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_765bcf05-75f1-4bbc-be34-8bd7dc89decb/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 20:54:39,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:54:39,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 16 conjunts are in the unsatisfiable core [2020-11-29 20:54:39,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:54:39,555 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 20:54:39,556 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 20:54:39,563 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 20:54:39,613 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-11-29 20:54:39,614 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-11-29 20:54:39,614 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 14 [2020-11-29 20:54:39,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400081365] [2020-11-29 20:54:39,615 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-29 20:54:39,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:54:39,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-29 20:54:39,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2020-11-29 20:54:39,615 INFO L87 Difference]: Start difference. First operand 79 states and 91 transitions. Second operand 8 states. [2020-11-29 20:54:39,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:54:39,875 INFO L93 Difference]: Finished difference Result 96 states and 107 transitions. [2020-11-29 20:54:39,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-29 20:54:39,876 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 48 [2020-11-29 20:54:39,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:54:39,877 INFO L225 Difference]: With dead ends: 96 [2020-11-29 20:54:39,878 INFO L226 Difference]: Without dead ends: 96 [2020-11-29 20:54:39,878 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2020-11-29 20:54:39,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-11-29 20:54:39,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 83. [2020-11-29 20:54:39,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-11-29 20:54:39,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 94 transitions. [2020-11-29 20:54:39,887 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 94 transitions. Word has length 48 [2020-11-29 20:54:39,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:54:39,888 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 94 transitions. [2020-11-29 20:54:39,888 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-29 20:54:39,888 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 94 transitions. [2020-11-29 20:54:39,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-11-29 20:54:39,889 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:54:39,889 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:54:40,105 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-11-29 20:54:40,106 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr2REQUIRES_VIOLATION, mainErr7ENSURES_VIOLATIONMEMORY_LEAK, mainErr3REQUIRES_VIOLATION, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6ASSERT_VIOLATIONMEMORY_FREE, checkErr2REQUIRES_VIOLATION, checkErr3REQUIRES_VIOLATION, checkErr4REQUIRES_VIOLATION, checkErr5REQUIRES_VIOLATION, checkErr0REQUIRES_VIOLATION, checkErr6REQUIRES_VIOLATION, checkErr1REQUIRES_VIOLATION, checkErr7REQUIRES_VIOLATION]=== [2020-11-29 20:54:40,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:54:40,106 INFO L82 PathProgramCache]: Analyzing trace with hash 884706021, now seen corresponding path program 1 times [2020-11-29 20:54:40,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:54:40,106 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388700186] [2020-11-29 20:54:40,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:54:40,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:54:40,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 20:54:40,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:54:40,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-29 20:54:40,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:54:40,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-11-29 20:54:40,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:54:40,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-11-29 20:54:40,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:54:40,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-11-29 20:54:40,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:54:40,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-11-29 20:54:40,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:54:40,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-11-29 20:54:40,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:54:40,396 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-11-29 20:54:40,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388700186] [2020-11-29 20:54:40,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050148376] [2020-11-29 20:54:40,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_765bcf05-75f1-4bbc-be34-8bd7dc89decb/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 20:54:40,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:54:40,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 17 conjunts are in the unsatisfiable core [2020-11-29 20:54:40,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:54:41,033 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-11-29 20:54:41,035 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:54:41,035 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2020-11-29 20:54:41,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651746201] [2020-11-29 20:54:41,038 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-29 20:54:41,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:54:41,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-29 20:54:41,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2020-11-29 20:54:41,042 INFO L87 Difference]: Start difference. First operand 83 states and 94 transitions. Second operand 19 states. [2020-11-29 20:54:42,022 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 63 [2020-11-29 20:54:42,271 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2020-11-29 20:54:42,416 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 56 [2020-11-29 20:54:42,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:54:42,842 INFO L93 Difference]: Finished difference Result 147 states and 176 transitions. [2020-11-29 20:54:42,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-11-29 20:54:42,842 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 47 [2020-11-29 20:54:42,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:54:42,844 INFO L225 Difference]: With dead ends: 147 [2020-11-29 20:54:42,844 INFO L226 Difference]: Without dead ends: 145 [2020-11-29 20:54:42,845 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=181, Invalid=875, Unknown=0, NotChecked=0, Total=1056 [2020-11-29 20:54:42,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-11-29 20:54:42,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 119. [2020-11-29 20:54:42,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-11-29 20:54:42,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 145 transitions. [2020-11-29 20:54:42,862 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 145 transitions. Word has length 47 [2020-11-29 20:54:42,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:54:42,863 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 145 transitions. [2020-11-29 20:54:42,863 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-11-29 20:54:42,864 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 145 transitions. [2020-11-29 20:54:42,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-11-29 20:54:42,866 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:54:42,866 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:54:43,081 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-11-29 20:54:43,082 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr2REQUIRES_VIOLATION, mainErr7ENSURES_VIOLATIONMEMORY_LEAK, mainErr3REQUIRES_VIOLATION, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6ASSERT_VIOLATIONMEMORY_FREE, checkErr2REQUIRES_VIOLATION, checkErr3REQUIRES_VIOLATION, checkErr4REQUIRES_VIOLATION, checkErr5REQUIRES_VIOLATION, checkErr0REQUIRES_VIOLATION, checkErr6REQUIRES_VIOLATION, checkErr1REQUIRES_VIOLATION, checkErr7REQUIRES_VIOLATION]=== [2020-11-29 20:54:43,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:54:43,082 INFO L82 PathProgramCache]: Analyzing trace with hash -201038362, now seen corresponding path program 1 times [2020-11-29 20:54:43,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:54:43,083 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732349193] [2020-11-29 20:54:43,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:54:43,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:54:43,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 20:54:43,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:54:43,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-29 20:54:43,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:54:43,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-11-29 20:54:43,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:54:43,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-11-29 20:54:43,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:54:43,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-11-29 20:54:43,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:54:43,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-11-29 20:54:43,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:54:43,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-11-29 20:54:43,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:54:43,420 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-11-29 20:54:43,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732349193] [2020-11-29 20:54:43,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951142644] [2020-11-29 20:54:43,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_765bcf05-75f1-4bbc-be34-8bd7dc89decb/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 20:54:43,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:54:43,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 21 conjunts are in the unsatisfiable core [2020-11-29 20:54:43,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:54:43,995 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-11-29 20:54:43,996 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:54:43,997 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 26 [2020-11-29 20:54:44,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263878387] [2020-11-29 20:54:44,000 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-11-29 20:54:44,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:54:44,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-11-29 20:54:44,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=624, Unknown=0, NotChecked=0, Total=702 [2020-11-29 20:54:44,002 INFO L87 Difference]: Start difference. First operand 119 states and 145 transitions. Second operand 27 states. [2020-11-29 20:54:45,421 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2020-11-29 20:54:46,550 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 57 [2020-11-29 20:54:46,745 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 57 [2020-11-29 20:54:47,519 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 63 [2020-11-29 20:54:48,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:54:48,513 INFO L93 Difference]: Finished difference Result 214 states and 262 transitions. [2020-11-29 20:54:48,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-11-29 20:54:48,514 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 49 [2020-11-29 20:54:48,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:54:48,515 INFO L225 Difference]: With dead ends: 214 [2020-11-29 20:54:48,516 INFO L226 Difference]: Without dead ends: 214 [2020-11-29 20:54:48,517 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=499, Invalid=2581, Unknown=0, NotChecked=0, Total=3080 [2020-11-29 20:54:48,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-11-29 20:54:48,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 148. [2020-11-29 20:54:48,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-11-29 20:54:48,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 179 transitions. [2020-11-29 20:54:48,528 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 179 transitions. Word has length 49 [2020-11-29 20:54:48,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:54:48,528 INFO L481 AbstractCegarLoop]: Abstraction has 148 states and 179 transitions. [2020-11-29 20:54:48,528 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-11-29 20:54:48,529 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 179 transitions. [2020-11-29 20:54:48,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-11-29 20:54:48,529 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:54:48,530 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:54:48,745 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-11-29 20:54:48,746 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr2REQUIRES_VIOLATION, mainErr7ENSURES_VIOLATIONMEMORY_LEAK, mainErr3REQUIRES_VIOLATION, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6ASSERT_VIOLATIONMEMORY_FREE, checkErr2REQUIRES_VIOLATION, checkErr3REQUIRES_VIOLATION, checkErr4REQUIRES_VIOLATION, checkErr5REQUIRES_VIOLATION, checkErr0REQUIRES_VIOLATION, checkErr6REQUIRES_VIOLATION, checkErr1REQUIRES_VIOLATION, checkErr7REQUIRES_VIOLATION]=== [2020-11-29 20:54:48,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:54:48,746 INFO L82 PathProgramCache]: Analyzing trace with hash -594065372, now seen corresponding path program 1 times [2020-11-29 20:54:48,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:54:48,747 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491148770] [2020-11-29 20:54:48,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:54:48,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:54:48,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 20:54:48,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:54:48,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-29 20:54:48,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:54:48,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-11-29 20:54:48,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:54:48,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-11-29 20:54:48,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:54:48,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-11-29 20:54:48,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:54:48,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-11-29 20:54:48,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:54:48,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-11-29 20:54:48,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:54:48,936 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-11-29 20:54:48,936 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491148770] [2020-11-29 20:54:48,936 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398323514] [2020-11-29 20:54:48,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_765bcf05-75f1-4bbc-be34-8bd7dc89decb/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 20:54:49,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:54:49,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 19 conjunts are in the unsatisfiable core [2020-11-29 20:54:49,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:54:49,415 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-11-29 20:54:49,416 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:54:49,416 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 22 [2020-11-29 20:54:49,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208579952] [2020-11-29 20:54:49,417 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-29 20:54:49,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:54:49,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-29 20:54:49,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=413, Unknown=0, NotChecked=0, Total=462 [2020-11-29 20:54:49,418 INFO L87 Difference]: Start difference. First operand 148 states and 179 transitions. Second operand 22 states. [2020-11-29 20:54:54,698 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 63 DAG size of output: 62 [2020-11-29 20:54:59,168 WARN L193 SmtUtils]: Spent 4.13 s on a formula simplification. DAG size of input: 65 DAG size of output: 64 [2020-11-29 20:54:59,350 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 64 [2020-11-29 20:54:59,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:54:59,399 INFO L93 Difference]: Finished difference Result 93 states and 99 transitions. [2020-11-29 20:54:59,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-11-29 20:54:59,400 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 49 [2020-11-29 20:54:59,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:54:59,401 INFO L225 Difference]: With dead ends: 93 [2020-11-29 20:54:59,401 INFO L226 Difference]: Without dead ends: 93 [2020-11-29 20:54:59,402 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=289, Invalid=1433, Unknown=0, NotChecked=0, Total=1722 [2020-11-29 20:54:59,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-11-29 20:54:59,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2020-11-29 20:54:59,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-11-29 20:54:59,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 99 transitions. [2020-11-29 20:54:59,408 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 99 transitions. Word has length 49 [2020-11-29 20:54:59,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:54:59,409 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 99 transitions. [2020-11-29 20:54:59,409 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-11-29 20:54:59,409 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 99 transitions. [2020-11-29 20:54:59,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-11-29 20:54:59,410 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:54:59,410 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:54:59,625 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:54:59,626 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr2REQUIRES_VIOLATION, mainErr7ENSURES_VIOLATIONMEMORY_LEAK, mainErr3REQUIRES_VIOLATION, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6ASSERT_VIOLATIONMEMORY_FREE, checkErr2REQUIRES_VIOLATION, checkErr3REQUIRES_VIOLATION, checkErr4REQUIRES_VIOLATION, checkErr5REQUIRES_VIOLATION, checkErr0REQUIRES_VIOLATION, checkErr6REQUIRES_VIOLATION, checkErr1REQUIRES_VIOLATION, checkErr7REQUIRES_VIOLATION]=== [2020-11-29 20:54:59,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:54:59,626 INFO L82 PathProgramCache]: Analyzing trace with hash 1239417503, now seen corresponding path program 1 times [2020-11-29 20:54:59,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:54:59,626 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703120719] [2020-11-29 20:54:59,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:54:59,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:54:59,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 20:54:59,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:54:59,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-29 20:54:59,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:54:59,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-11-29 20:54:59,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:54:59,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-11-29 20:54:59,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:54:59,866 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-11-29 20:54:59,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:54:59,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-11-29 20:54:59,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:54:59,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-11-29 20:54:59,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:54:59,877 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-11-29 20:54:59,878 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703120719] [2020-11-29 20:54:59,878 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257267994] [2020-11-29 20:54:59,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_765bcf05-75f1-4bbc-be34-8bd7dc89decb/bin/uautomizer/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:54:59,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:54:59,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 16 conjunts are in the unsatisfiable core [2020-11-29 20:54:59,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:54:59,999 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 7 treesize of output 6 [2020-11-29 20:54:59,999 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 20:55:00,005 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 20:55:00,005 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-29 20:55:00,005 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:7, output treesize:6 [2020-11-29 20:55:02,018 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_check_~a.base_BEFORE_CALL_4 Int)) (= (select |c_#memory_int| v_check_~a.base_BEFORE_CALL_4) ((as const (Array Int Int)) 0))) is different from true [2020-11-29 20:55:04,033 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_check_~a.base_BEFORE_CALL_5 Int)) (= (select |c_#memory_int| v_check_~a.base_BEFORE_CALL_5) ((as const (Array Int Int)) 0))) is different from true [2020-11-29 20:55:06,051 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_check_~a.base_BEFORE_CALL_6 Int)) (= ((as const (Array Int Int)) 0) (select |c_#memory_int| v_check_~a.base_BEFORE_CALL_6))) is different from true [2020-11-29 20:55:06,140 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2020-11-29 20:55:06,141 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 20:55:06,146 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 20:55:06,147 INFO L545 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2020-11-29 20:55:06,147 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:29, output treesize:21 [2020-11-29 20:55:06,230 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 20:55:06,315 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 4 not checked. [2020-11-29 20:55:06,315 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:55:06,316 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 24 [2020-11-29 20:55:06,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415272412] [2020-11-29 20:55:06,316 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-11-29 20:55:06,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:55:06,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-11-29 20:55:06,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=374, Unknown=3, NotChecked=120, Total=552 [2020-11-29 20:55:06,317 INFO L87 Difference]: Start difference. First operand 93 states and 99 transitions. Second operand 24 states. [2020-11-29 20:55:10,850 WARN L193 SmtUtils]: Spent 2.07 s on a formula simplification that was a NOOP. DAG size: 40 [2020-11-29 20:55:12,968 WARN L193 SmtUtils]: Spent 2.06 s on a formula simplification that was a NOOP. DAG size: 43 [2020-11-29 20:55:21,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:55:21,701 INFO L93 Difference]: Finished difference Result 94 states and 99 transitions. [2020-11-29 20:55:21,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-11-29 20:55:21,702 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 55 [2020-11-29 20:55:21,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:55:21,702 INFO L225 Difference]: With dead ends: 94 [2020-11-29 20:55:21,702 INFO L226 Difference]: Without dead ends: 94 [2020-11-29 20:55:21,703 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 57 SyntacticMatches, 5 SemanticMatches, 35 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 21.1s TimeCoverageRelationStatistics Valid=166, Invalid=961, Unknown=7, NotChecked=198, Total=1332 [2020-11-29 20:55:21,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-11-29 20:55:21,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2020-11-29 20:55:21,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-11-29 20:55:21,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 99 transitions. [2020-11-29 20:55:21,706 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 99 transitions. Word has length 55 [2020-11-29 20:55:21,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:55:21,706 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 99 transitions. [2020-11-29 20:55:21,706 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-11-29 20:55:21,706 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 99 transitions. [2020-11-29 20:55:21,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-11-29 20:55:21,707 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:55:21,707 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 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 20:55:21,917 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-11-29 20:55:21,918 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr2REQUIRES_VIOLATION, mainErr7ENSURES_VIOLATIONMEMORY_LEAK, mainErr3REQUIRES_VIOLATION, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6ASSERT_VIOLATIONMEMORY_FREE, checkErr2REQUIRES_VIOLATION, checkErr3REQUIRES_VIOLATION, checkErr4REQUIRES_VIOLATION, checkErr5REQUIRES_VIOLATION, checkErr0REQUIRES_VIOLATION, checkErr6REQUIRES_VIOLATION, checkErr1REQUIRES_VIOLATION, checkErr7REQUIRES_VIOLATION]=== [2020-11-29 20:55:21,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:55:21,918 INFO L82 PathProgramCache]: Analyzing trace with hash 1484067441, now seen corresponding path program 1 times [2020-11-29 20:55:21,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:55:21,918 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821920914] [2020-11-29 20:55:21,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:55:21,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:55:22,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 20:55:22,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:55:22,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-29 20:55:22,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:55:22,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-11-29 20:55:22,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:55:22,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-11-29 20:55:22,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:55:22,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-11-29 20:55:22,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:55:22,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-11-29 20:55:22,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:55:22,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-11-29 20:55:22,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:55:22,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-11-29 20:55:22,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:55:22,200 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-11-29 20:55:22,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821920914] [2020-11-29 20:55:22,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986203110] [2020-11-29 20:55:22,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_765bcf05-75f1-4bbc-be34-8bd7dc89decb/bin/uautomizer/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:55:22,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:55:22,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 31 conjunts are in the unsatisfiable core [2020-11-29 20:55:22,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:55:22,754 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 18 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-11-29 20:55:22,755 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:55:22,755 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2020-11-29 20:55:22,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206445344] [2020-11-29 20:55:22,756 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-29 20:55:22,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:55:22,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-29 20:55:22,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2020-11-29 20:55:22,757 INFO L87 Difference]: Start difference. First operand 94 states and 99 transitions. Second operand 20 states. [2020-11-29 20:55:24,018 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 65 [2020-11-29 20:55:24,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:55:24,359 INFO L93 Difference]: Finished difference Result 93 states and 97 transitions. [2020-11-29 20:55:24,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-11-29 20:55:24,359 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 55 [2020-11-29 20:55:24,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:55:24,360 INFO L225 Difference]: With dead ends: 93 [2020-11-29 20:55:24,360 INFO L226 Difference]: Without dead ends: 93 [2020-11-29 20:55:24,361 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 59 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=180, Invalid=876, Unknown=0, NotChecked=0, Total=1056 [2020-11-29 20:55:24,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-11-29 20:55:24,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2020-11-29 20:55:24,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-11-29 20:55:24,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 97 transitions. [2020-11-29 20:55:24,365 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 97 transitions. Word has length 55 [2020-11-29 20:55:24,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:55:24,365 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 97 transitions. [2020-11-29 20:55:24,365 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-11-29 20:55:24,365 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 97 transitions. [2020-11-29 20:55:24,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-11-29 20:55:24,366 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:55:24,366 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:55:24,577 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-11-29 20:55:24,578 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr2REQUIRES_VIOLATION, mainErr7ENSURES_VIOLATIONMEMORY_LEAK, mainErr3REQUIRES_VIOLATION, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6ASSERT_VIOLATIONMEMORY_FREE, checkErr2REQUIRES_VIOLATION, checkErr3REQUIRES_VIOLATION, checkErr4REQUIRES_VIOLATION, checkErr5REQUIRES_VIOLATION, checkErr0REQUIRES_VIOLATION, checkErr6REQUIRES_VIOLATION, checkErr1REQUIRES_VIOLATION, checkErr7REQUIRES_VIOLATION]=== [2020-11-29 20:55:24,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:55:24,578 INFO L82 PathProgramCache]: Analyzing trace with hash 862025469, now seen corresponding path program 1 times [2020-11-29 20:55:24,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:55:24,578 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219148263] [2020-11-29 20:55:24,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:55:24,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:55:24,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 20:55:24,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:55:24,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-29 20:55:24,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:55:24,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-11-29 20:55:24,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:55:24,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-11-29 20:55:24,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:55:24,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-11-29 20:55:24,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:55:25,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:55:25,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:55:25,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-11-29 20:55:25,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:55:25,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-11-29 20:55:25,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:55:25,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-11-29 20:55:25,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:55:25,119 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-11-29 20:55:25,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219148263] [2020-11-29 20:55:25,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116704267] [2020-11-29 20:55:25,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_765bcf05-75f1-4bbc-be34-8bd7dc89decb/bin/uautomizer/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:55:25,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:55:25,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 31 conjunts are in the unsatisfiable core [2020-11-29 20:55:25,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:55:25,227 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 0 case distinctions, treesize of input 8 treesize of output 7 [2020-11-29 20:55:25,228 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 20:55:25,243 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 20:55:25,243 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-29 20:55:25,243 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:12, output treesize:11 [2020-11-29 20:55:25,943 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-11-29 20:55:25,943 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:55:25,943 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 26 [2020-11-29 20:55:25,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351875] [2020-11-29 20:55:25,944 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-11-29 20:55:25,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:55:25,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-11-29 20:55:25,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=631, Unknown=0, NotChecked=0, Total=702 [2020-11-29 20:55:25,945 INFO L87 Difference]: Start difference. First operand 92 states and 97 transitions. Second operand 27 states. [2020-11-29 20:55:29,176 WARN L193 SmtUtils]: Spent 915.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 57 [2020-11-29 20:55:29,558 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-29 20:55:29,719 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-29 20:55:30,774 WARN L193 SmtUtils]: Spent 893.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 57 [2020-11-29 20:55:30,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:55:30,815 INFO L93 Difference]: Finished difference Result 101 states and 109 transitions. [2020-11-29 20:55:30,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-11-29 20:55:30,816 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 62 [2020-11-29 20:55:30,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:55:30,817 INFO L225 Difference]: With dead ends: 101 [2020-11-29 20:55:30,817 INFO L226 Difference]: Without dead ends: 83 [2020-11-29 20:55:30,818 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 64 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=278, Invalid=1702, Unknown=0, NotChecked=0, Total=1980 [2020-11-29 20:55:30,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-11-29 20:55:30,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 78. [2020-11-29 20:55:30,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-11-29 20:55:30,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 81 transitions. [2020-11-29 20:55:30,822 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 81 transitions. Word has length 62 [2020-11-29 20:55:30,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:55:30,823 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 81 transitions. [2020-11-29 20:55:30,823 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-11-29 20:55:30,823 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 81 transitions. [2020-11-29 20:55:30,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-11-29 20:55:30,824 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:55:30,824 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:55:31,033 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-11-29 20:55:31,034 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr2REQUIRES_VIOLATION, mainErr7ENSURES_VIOLATIONMEMORY_LEAK, mainErr3REQUIRES_VIOLATION, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6ASSERT_VIOLATIONMEMORY_FREE, checkErr2REQUIRES_VIOLATION, checkErr3REQUIRES_VIOLATION, checkErr4REQUIRES_VIOLATION, checkErr5REQUIRES_VIOLATION, checkErr0REQUIRES_VIOLATION, checkErr6REQUIRES_VIOLATION, checkErr1REQUIRES_VIOLATION, checkErr7REQUIRES_VIOLATION]=== [2020-11-29 20:55:31,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:55:31,034 INFO L82 PathProgramCache]: Analyzing trace with hash 649856754, now seen corresponding path program 1 times [2020-11-29 20:55:31,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:55:31,034 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779449485] [2020-11-29 20:55:31,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:55:31,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:55:31,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 20:55:31,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:55:31,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-29 20:55:31,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:55:31,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-11-29 20:55:31,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:55:31,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-11-29 20:55:31,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:55:31,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-11-29 20:55:31,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:55:31,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-11-29 20:55:31,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:55:31,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-11-29 20:55:31,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:55:31,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:55:31,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:55:31,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-11-29 20:55:31,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:55:31,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-11-29 20:55:31,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:55:31,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-11-29 20:55:31,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:55:31,556 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2020-11-29 20:55:31,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779449485] [2020-11-29 20:55:31,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160144091] [2020-11-29 20:55:31,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_765bcf05-75f1-4bbc-be34-8bd7dc89decb/bin/uautomizer/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:55:31,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:55:31,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 32 conjunts are in the unsatisfiable core [2020-11-29 20:55:31,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:55:32,234 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-11-29 20:55:32,234 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:55:32,234 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 31 [2020-11-29 20:55:32,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004074212] [2020-11-29 20:55:32,235 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-11-29 20:55:32,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:55:32,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-11-29 20:55:32,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=909, Unknown=0, NotChecked=0, Total=992 [2020-11-29 20:55:32,236 INFO L87 Difference]: Start difference. First operand 78 states and 81 transitions. Second operand 32 states. [2020-11-29 20:55:32,907 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 49 [2020-11-29 20:55:34,275 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 59 [2020-11-29 20:55:34,519 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 62 [2020-11-29 20:55:34,725 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 58 [2020-11-29 20:55:34,885 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 58 [2020-11-29 20:55:35,087 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 60 [2020-11-29 20:55:35,243 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 60 [2020-11-29 20:55:35,483 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 63 [2020-11-29 20:55:35,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:55:35,539 INFO L93 Difference]: Finished difference Result 82 states and 86 transitions. [2020-11-29 20:55:35,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-11-29 20:55:35,540 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 79 [2020-11-29 20:55:35,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:55:35,541 INFO L225 Difference]: With dead ends: 82 [2020-11-29 20:55:35,541 INFO L226 Difference]: Without dead ends: 0 [2020-11-29 20:55:35,542 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=410, Invalid=2452, Unknown=0, NotChecked=0, Total=2862 [2020-11-29 20:55:35,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-29 20:55:35,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-29 20:55:35,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-29 20:55:35,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-29 20:55:35,542 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 79 [2020-11-29 20:55:35,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:55:35,542 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-29 20:55:35,542 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-11-29 20:55:35,542 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-29 20:55:35,543 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-29 20:55:35,743 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:55:35,746 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.11 08:55:35 BoogieIcfgContainer [2020-11-29 20:55:35,746 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-29 20:55:35,747 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-29 20:55:35,747 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-29 20:55:35,747 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-29 20:55:35,748 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 08:54:30" (3/4) ... [2020-11-29 20:55:35,751 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-29 20:55:35,757 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure reach_error [2020-11-29 20:55:35,757 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2020-11-29 20:55:35,758 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure assume_abort_if_not [2020-11-29 20:55:35,758 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2020-11-29 20:55:35,758 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2020-11-29 20:55:35,758 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure check [2020-11-29 20:55:35,758 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure #Ultimate.meminit [2020-11-29 20:55:35,766 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 22 nodes and edges [2020-11-29 20:55:35,766 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2020-11-29 20:55:35,767 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-11-29 20:55:35,767 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-29 20:55:35,835 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_765bcf05-75f1-4bbc-be34-8bd7dc89decb/bin/uautomizer/witness.graphml [2020-11-29 20:55:35,835 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-29 20:55:35,837 INFO L168 Benchmark]: Toolchain (without parser) took 66512.69 ms. Allocated memory was 98.6 MB in the beginning and 174.1 MB in the end (delta: 75.5 MB). Free memory was 62.8 MB in the beginning and 148.2 MB in the end (delta: -85.3 MB). Peak memory consumption was 92.3 MB. Max. memory is 16.1 GB. [2020-11-29 20:55:35,838 INFO L168 Benchmark]: CDTParser took 0.52 ms. Allocated memory is still 98.6 MB. Free memory was 79.0 MB in the beginning and 78.9 MB in the end (delta: 57.3 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 20:55:35,838 INFO L168 Benchmark]: CACSL2BoogieTranslator took 268.81 ms. Allocated memory is still 98.6 MB. Free memory was 62.7 MB in the beginning and 74.7 MB in the end (delta: -12.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-29 20:55:35,838 INFO L168 Benchmark]: Boogie Preprocessor took 34.11 ms. Allocated memory is still 98.6 MB. Free memory was 74.7 MB in the beginning and 73.0 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 20:55:35,839 INFO L168 Benchmark]: RCFGBuilder took 558.05 ms. Allocated memory is still 98.6 MB. Free memory was 73.0 MB in the beginning and 50.2 MB in the end (delta: 22.8 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. [2020-11-29 20:55:35,840 INFO L168 Benchmark]: TraceAbstraction took 65549.54 ms. Allocated memory was 98.6 MB in the beginning and 174.1 MB in the end (delta: 75.5 MB). Free memory was 49.9 MB in the beginning and 51.6 MB in the end (delta: -1.7 MB). Peak memory consumption was 75.9 MB. Max. memory is 16.1 GB. [2020-11-29 20:55:35,840 INFO L168 Benchmark]: Witness Printer took 88.49 ms. Allocated memory is still 174.1 MB. Free memory was 50.9 MB in the beginning and 148.2 MB in the end (delta: -97.2 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2020-11-29 20:55:35,843 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.52 ms. Allocated memory is still 98.6 MB. Free memory was 79.0 MB in the beginning and 78.9 MB in the end (delta: 57.3 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 268.81 ms. Allocated memory is still 98.6 MB. Free memory was 62.7 MB in the beginning and 74.7 MB in the end (delta: -12.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 34.11 ms. Allocated memory is still 98.6 MB. Free memory was 74.7 MB in the beginning and 73.0 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 558.05 ms. Allocated memory is still 98.6 MB. Free memory was 73.0 MB in the beginning and 50.2 MB in the end (delta: 22.8 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. * TraceAbstraction took 65549.54 ms. Allocated memory was 98.6 MB in the beginning and 174.1 MB in the end (delta: 75.5 MB). Free memory was 49.9 MB in the beginning and 51.6 MB in the end (delta: -1.7 MB). Peak memory consumption was 75.9 MB. Max. memory is 16.1 GB. * Witness Printer took 88.49 ms. Allocated memory is still 174.1 MB. Free memory was 50.9 MB in the beginning and 148.2 MB in the end (delta: -97.2 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 49]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 40]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 49]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 52]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 48]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 52]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 48]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 52]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 26]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 26]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 33]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 33]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 26]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 34]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 26]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 34]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - AllSpecificationsHoldResult: All specifications hold 17 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 8 procedures, 77 locations, 17 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 65.4s, OverallIterations: 19, TraceHistogramMax: 4, AutomataDifference: 47.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 792 SDtfs, 2788 SDslu, 1670 SDs, 0 SdLazy, 9346 SolverSat, 1543 SolverUnsat, 4 SolverUnknown, 0 SolverNotchecked, 9.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1038 GetRequests, 596 SyntacticMatches, 12 SemanticMatches, 430 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 2033 ImplicationChecksByTransitivity, 47.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=148occurred in iteration=14, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 19 MinimizatonAttempts, 192 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 14.2s InterpolantComputationTime, 1277 NumberOfCodeBlocks, 1277 NumberOfCodeBlocksAsserted, 27 NumberOfCheckSat, 1250 ConstructedInterpolants, 73 QuantifiedInterpolants, 326925 SizeOfPredicates, 60 NumberOfNonLiveVariables, 2054 ConjunctsInSsa, 183 ConjunctsInUnsatCore, 27 InterpolantComputations, 12 PerfectInterpolantSequences, 358/436 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 correct! Received shutdown request...