./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength4.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_77f9a7a4-aae7-4116-98da-232ccea1378a/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_77f9a7a4-aae7-4116-98da-232ccea1378a/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_77f9a7a4-aae7-4116-98da-232ccea1378a/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_77f9a7a4-aae7-4116-98da-232ccea1378a/bin/uautomizer/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength4.c -s /tmp/vcloud-vcloud-master/worker/run_dir_77f9a7a4-aae7-4116-98da-232ccea1378a/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_77f9a7a4-aae7-4116-98da-232ccea1378a/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 97fe3d28a1849ecc88958d9d302f4fb4c5dbb992 .............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-28 03:20:34,641 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-28 03:20:34,643 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-28 03:20:34,693 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-28 03:20:34,694 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-28 03:20:34,695 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-28 03:20:34,697 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-28 03:20:34,705 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-28 03:20:34,708 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-28 03:20:34,713 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-28 03:20:34,714 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-28 03:20:34,727 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-28 03:20:34,728 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-28 03:20:34,729 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-28 03:20:34,731 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-28 03:20:34,732 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-28 03:20:34,734 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-28 03:20:34,735 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-28 03:20:34,737 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-28 03:20:34,740 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-28 03:20:34,742 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-28 03:20:34,745 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-28 03:20:34,747 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-28 03:20:34,748 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-28 03:20:34,752 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-28 03:20:34,753 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-28 03:20:34,754 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-28 03:20:34,755 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-28 03:20:34,756 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-28 03:20:34,757 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-28 03:20:34,757 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-28 03:20:34,759 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-28 03:20:34,760 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-28 03:20:34,761 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-28 03:20:34,762 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-28 03:20:34,762 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-28 03:20:34,763 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-28 03:20:34,764 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-28 03:20:34,764 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-28 03:20:34,766 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-28 03:20:34,767 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-28 03:20:34,770 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_77f9a7a4-aae7-4116-98da-232ccea1378a/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2020-11-28 03:20:34,795 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-28 03:20:34,796 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-28 03:20:34,798 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-28 03:20:34,798 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-28 03:20:34,798 INFO L138 SettingsManager]: * Use SBE=true [2020-11-28 03:20:34,799 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-28 03:20:34,799 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-28 03:20:34,799 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-11-28 03:20:34,800 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-28 03:20:34,800 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-28 03:20:34,801 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-28 03:20:34,801 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-11-28 03:20:34,801 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-11-28 03:20:34,802 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-11-28 03:20:34,802 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-28 03:20:34,802 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-28 03:20:34,803 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-28 03:20:34,803 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-28 03:20:34,803 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-28 03:20:34,804 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-28 03:20:34,804 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-28 03:20:34,804 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-28 03:20:34,805 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 03:20:34,805 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-28 03:20:34,805 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-28 03:20:34,806 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-28 03:20:34,806 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-28 03:20:34,806 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-28 03:20:34,807 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_77f9a7a4-aae7-4116-98da-232ccea1378a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_77f9a7a4-aae7-4116-98da-232ccea1378a/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 97fe3d28a1849ecc88958d9d302f4fb4c5dbb992 [2020-11-28 03:20:35,108 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-28 03:20:35,145 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-28 03:20:35,148 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-28 03:20:35,150 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-28 03:20:35,152 INFO L275 PluginConnector]: CDTParser initialized [2020-11-28 03:20:35,154 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_77f9a7a4-aae7-4116-98da-232ccea1378a/bin/uautomizer/../../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength4.c [2020-11-28 03:20:35,256 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_77f9a7a4-aae7-4116-98da-232ccea1378a/bin/uautomizer/data/8a253372e/85f5be2ed35c482b8604b86cdeb76619/FLAG7276ab07c [2020-11-28 03:20:35,803 INFO L306 CDTParser]: Found 1 translation units. [2020-11-28 03:20:35,804 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_77f9a7a4-aae7-4116-98da-232ccea1378a/sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength4.c [2020-11-28 03:20:35,815 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_77f9a7a4-aae7-4116-98da-232ccea1378a/bin/uautomizer/data/8a253372e/85f5be2ed35c482b8604b86cdeb76619/FLAG7276ab07c [2020-11-28 03:20:36,169 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_77f9a7a4-aae7-4116-98da-232ccea1378a/bin/uautomizer/data/8a253372e/85f5be2ed35c482b8604b86cdeb76619 [2020-11-28 03:20:36,172 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-28 03:20:36,174 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-11-28 03:20:36,176 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-28 03:20:36,176 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-28 03:20:36,180 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-28 03:20:36,180 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:20:36" (1/1) ... [2020-11-28 03:20:36,183 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@670ef322 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:20:36, skipping insertion in model container [2020-11-28 03:20:36,183 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:20:36" (1/1) ... [2020-11-28 03:20:36,191 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-28 03:20:36,204 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-28 03:20:36,379 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 03:20:36,399 INFO L203 MainTranslator]: Completed pre-run [2020-11-28 03:20:36,421 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 03:20:36,437 INFO L208 MainTranslator]: Completed translation [2020-11-28 03:20:36,439 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:20:36 WrapperNode [2020-11-28 03:20:36,440 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-28 03:20:36,441 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-28 03:20:36,441 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-28 03:20:36,441 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-28 03:20:36,453 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:20:36" (1/1) ... [2020-11-28 03:20:36,454 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:20:36" (1/1) ... [2020-11-28 03:20:36,462 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:20:36" (1/1) ... [2020-11-28 03:20:36,464 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:20:36" (1/1) ... [2020-11-28 03:20:36,484 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:20:36" (1/1) ... [2020-11-28 03:20:36,489 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:20:36" (1/1) ... [2020-11-28 03:20:36,499 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:20:36" (1/1) ... [2020-11-28 03:20:36,501 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-28 03:20:36,504 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-28 03:20:36,505 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-28 03:20:36,505 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-28 03:20:36,507 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:20:36" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_77f9a7a4-aae7-4116-98da-232ccea1378a/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 [2020-11-28 03:20:36,590 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-28 03:20:36,590 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-28 03:20:36,591 INFO L138 BoogieDeclarations]: Found implementation of procedure foo [2020-11-28 03:20:36,592 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-28 03:20:36,592 INFO L130 BoogieDeclarations]: Found specification of procedure foo [2020-11-28 03:20:36,592 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-28 03:20:36,593 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-28 03:20:36,594 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-28 03:20:36,594 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-28 03:20:36,594 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-28 03:20:36,595 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-28 03:20:36,595 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-28 03:20:37,078 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-28 03:20:37,079 INFO L298 CfgBuilder]: Removed 3 assume(true) statements. [2020-11-28 03:20:37,081 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:20:37 BoogieIcfgContainer [2020-11-28 03:20:37,081 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-28 03:20:37,086 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-28 03:20:37,086 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-28 03:20:37,090 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-28 03:20:37,091 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 03:20:36" (1/3) ... [2020-11-28 03:20:37,092 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f3ac213 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 03:20:37, skipping insertion in model container [2020-11-28 03:20:37,093 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:20:36" (2/3) ... [2020-11-28 03:20:37,093 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f3ac213 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 03:20:37, skipping insertion in model container [2020-11-28 03:20:37,093 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:20:37" (3/3) ... [2020-11-28 03:20:37,096 INFO L111 eAbstractionObserver]: Analyzing ICFG ArraysOfVariableLength4.c [2020-11-28 03:20:37,108 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-28 03:20:37,113 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 8 error locations. [2020-11-28 03:20:37,127 INFO L253 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2020-11-28 03:20:37,166 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-28 03:20:37,166 INFO L378 AbstractCegarLoop]: Hoare is false [2020-11-28 03:20:37,166 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-28 03:20:37,166 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-28 03:20:37,167 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-28 03:20:37,167 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-28 03:20:37,167 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-28 03:20:37,167 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-28 03:20:37,189 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states. [2020-11-28 03:20:37,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-28 03:20:37,206 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:20:37,207 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:20:37,207 INFO L429 AbstractCegarLoop]: === Iteration 1 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-28 03:20:37,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:20:37,216 INFO L82 PathProgramCache]: Analyzing trace with hash 1909189377, now seen corresponding path program 1 times [2020-11-28 03:20:37,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:20:37,229 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803610372] [2020-11-28 03:20:37,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:20:37,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:37,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:20:37,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:37,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:20:37,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803610372] [2020-11-28 03:20:37,486 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:20:37,487 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 03:20:37,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249675273] [2020-11-28 03:20:37,493 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 03:20:37,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:20:37,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 03:20:37,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:20:37,516 INFO L87 Difference]: Start difference. First operand 40 states. Second operand 4 states. [2020-11-28 03:20:37,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:20:37,831 INFO L93 Difference]: Finished difference Result 58 states and 63 transitions. [2020-11-28 03:20:37,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-28 03:20:37,833 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-11-28 03:20:37,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:20:37,843 INFO L225 Difference]: With dead ends: 58 [2020-11-28 03:20:37,843 INFO L226 Difference]: Without dead ends: 54 [2020-11-28 03:20:37,846 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-28 03:20:37,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-11-28 03:20:37,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 39. [2020-11-28 03:20:37,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-11-28 03:20:37,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2020-11-28 03:20:37,942 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 10 [2020-11-28 03:20:37,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:20:37,943 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2020-11-28 03:20:37,944 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 03:20:37,945 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2020-11-28 03:20:37,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-28 03:20:37,946 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:20:37,957 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:20:37,958 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-28 03:20:37,958 INFO L429 AbstractCegarLoop]: === Iteration 2 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-28 03:20:37,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:20:37,960 INFO L82 PathProgramCache]: Analyzing trace with hash -941983064, now seen corresponding path program 1 times [2020-11-28 03:20:37,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:20:37,962 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59881534] [2020-11-28 03:20:37,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:20:37,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:38,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:20:38,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:38,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:20:38,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59881534] [2020-11-28 03:20:38,058 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:20:38,058 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 03:20:38,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371485877] [2020-11-28 03:20:38,064 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 03:20:38,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:20:38,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 03:20:38,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:20:38,066 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand 4 states. [2020-11-28 03:20:38,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:20:38,236 INFO L93 Difference]: Finished difference Result 49 states and 53 transitions. [2020-11-28 03:20:38,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 03:20:38,237 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2020-11-28 03:20:38,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:20:38,239 INFO L225 Difference]: With dead ends: 49 [2020-11-28 03:20:38,239 INFO L226 Difference]: Without dead ends: 49 [2020-11-28 03:20:38,240 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-28 03:20:38,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-11-28 03:20:38,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 41. [2020-11-28 03:20:38,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-11-28 03:20:38,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2020-11-28 03:20:38,248 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 11 [2020-11-28 03:20:38,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:20:38,249 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2020-11-28 03:20:38,249 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 03:20:38,249 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2020-11-28 03:20:38,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-28 03:20:38,250 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:20:38,250 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:20:38,251 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-28 03:20:38,251 INFO L429 AbstractCegarLoop]: === Iteration 3 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-28 03:20:38,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:20:38,252 INFO L82 PathProgramCache]: Analyzing trace with hash 863296133, now seen corresponding path program 1 times [2020-11-28 03:20:38,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:20:38,253 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325924414] [2020-11-28 03:20:38,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:20:38,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:38,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:20:38,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:38,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:20:38,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325924414] [2020-11-28 03:20:38,337 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:20:38,337 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-28 03:20:38,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463814181] [2020-11-28 03:20:38,338 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-28 03:20:38,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:20:38,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-28 03:20:38,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-28 03:20:38,340 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand 6 states. [2020-11-28 03:20:38,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:20:38,527 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2020-11-28 03:20:38,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-28 03:20:38,528 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2020-11-28 03:20:38,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:20:38,529 INFO L225 Difference]: With dead ends: 40 [2020-11-28 03:20:38,529 INFO L226 Difference]: Without dead ends: 40 [2020-11-28 03:20:38,530 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-11-28 03:20:38,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-11-28 03:20:38,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-11-28 03:20:38,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-11-28 03:20:38,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2020-11-28 03:20:38,536 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 12 [2020-11-28 03:20:38,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:20:38,536 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2020-11-28 03:20:38,536 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-28 03:20:38,536 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2020-11-28 03:20:38,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-28 03:20:38,538 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:20:38,538 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:20:38,539 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-28 03:20:38,539 INFO L429 AbstractCegarLoop]: === Iteration 4 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-28 03:20:38,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:20:38,540 INFO L82 PathProgramCache]: Analyzing trace with hash 863296134, now seen corresponding path program 1 times [2020-11-28 03:20:38,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:20:38,540 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504016532] [2020-11-28 03:20:38,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:20:38,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:38,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:20:38,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:38,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:20:38,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504016532] [2020-11-28 03:20:38,683 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:20:38,683 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-28 03:20:38,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977019219] [2020-11-28 03:20:38,684 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-28 03:20:38,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:20:38,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-28 03:20:38,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-28 03:20:38,687 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand 6 states. [2020-11-28 03:20:38,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:20:38,892 INFO L93 Difference]: Finished difference Result 46 states and 50 transitions. [2020-11-28 03:20:38,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-28 03:20:38,893 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2020-11-28 03:20:38,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:20:38,894 INFO L225 Difference]: With dead ends: 46 [2020-11-28 03:20:38,894 INFO L226 Difference]: Without dead ends: 46 [2020-11-28 03:20:38,895 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-11-28 03:20:38,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-11-28 03:20:38,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 41. [2020-11-28 03:20:38,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-11-28 03:20:38,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2020-11-28 03:20:38,900 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 12 [2020-11-28 03:20:38,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:20:38,902 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2020-11-28 03:20:38,903 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-28 03:20:38,903 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2020-11-28 03:20:38,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-28 03:20:38,904 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:20:38,905 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:20:38,905 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-28 03:20:38,905 INFO L429 AbstractCegarLoop]: === Iteration 5 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-28 03:20:38,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:20:38,906 INFO L82 PathProgramCache]: Analyzing trace with hash 143250926, now seen corresponding path program 1 times [2020-11-28 03:20:38,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:20:38,907 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935712412] [2020-11-28 03:20:38,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:20:38,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:38,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:20:38,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:38,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-11-28 03:20:38,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:39,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:20:39,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935712412] [2020-11-28 03:20:39,046 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:20:39,047 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-28 03:20:39,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972523036] [2020-11-28 03:20:39,047 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-28 03:20:39,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:20:39,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-28 03:20:39,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-28 03:20:39,048 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand 5 states. [2020-11-28 03:20:39,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:20:39,200 INFO L93 Difference]: Finished difference Result 46 states and 49 transitions. [2020-11-28 03:20:39,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-28 03:20:39,201 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-11-28 03:20:39,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:20:39,202 INFO L225 Difference]: With dead ends: 46 [2020-11-28 03:20:39,202 INFO L226 Difference]: Without dead ends: 43 [2020-11-28 03:20:39,203 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-11-28 03:20:39,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-11-28 03:20:39,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 41. [2020-11-28 03:20:39,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-11-28 03:20:39,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2020-11-28 03:20:39,208 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 15 [2020-11-28 03:20:39,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:20:39,208 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2020-11-28 03:20:39,209 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-28 03:20:39,209 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2020-11-28 03:20:39,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-28 03:20:39,210 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:20:39,210 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:20:39,210 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-28 03:20:39,210 INFO L429 AbstractCegarLoop]: === Iteration 6 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-28 03:20:39,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:20:39,211 INFO L82 PathProgramCache]: Analyzing trace with hash 1623425863, now seen corresponding path program 1 times [2020-11-28 03:20:39,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:20:39,212 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968700658] [2020-11-28 03:20:39,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:20:39,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:39,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:20:39,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:39,275 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:20:39,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968700658] [2020-11-28 03:20:39,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495438266] [2020-11-28 03:20:39,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_77f9a7a4-aae7-4116-98da-232ccea1378a/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 [2020-11-28 03:20:39,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:39,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-28 03:20:39,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:20:39,410 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:20:39,411 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 03:20:39,411 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 4 [2020-11-28 03:20:39,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488655864] [2020-11-28 03:20:39,412 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-28 03:20:39,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:20:39,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-28 03:20:39,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-28 03:20:39,413 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand 5 states. [2020-11-28 03:20:39,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:20:39,541 INFO L93 Difference]: Finished difference Result 52 states and 56 transitions. [2020-11-28 03:20:39,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-28 03:20:39,542 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-11-28 03:20:39,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:20:39,543 INFO L225 Difference]: With dead ends: 52 [2020-11-28 03:20:39,543 INFO L226 Difference]: Without dead ends: 52 [2020-11-28 03:20:39,543 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-11-28 03:20:39,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-11-28 03:20:39,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 45. [2020-11-28 03:20:39,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-11-28 03:20:39,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2020-11-28 03:20:39,548 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 16 [2020-11-28 03:20:39,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:20:39,549 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2020-11-28 03:20:39,549 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-28 03:20:39,549 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2020-11-28 03:20:39,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-11-28 03:20:39,549 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:20:39,550 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:20:39,761 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-11-28 03:20:39,761 INFO L429 AbstractCegarLoop]: === Iteration 7 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-28 03:20:39,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:20:39,761 INFO L82 PathProgramCache]: Analyzing trace with hash -1213405753, now seen corresponding path program 1 times [2020-11-28 03:20:39,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:20:39,762 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538091634] [2020-11-28 03:20:39,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:20:39,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:39,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:20:39,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:39,903 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-28 03:20:39,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538091634] [2020-11-28 03:20:39,903 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:20:39,903 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-28 03:20:39,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563923582] [2020-11-28 03:20:39,904 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-28 03:20:39,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:20:39,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-28 03:20:39,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-11-28 03:20:39,905 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand 7 states. [2020-11-28 03:20:40,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:20:40,104 INFO L93 Difference]: Finished difference Result 44 states and 48 transitions. [2020-11-28 03:20:40,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-28 03:20:40,105 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 17 [2020-11-28 03:20:40,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:20:40,106 INFO L225 Difference]: With dead ends: 44 [2020-11-28 03:20:40,106 INFO L226 Difference]: Without dead ends: 44 [2020-11-28 03:20:40,106 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2020-11-28 03:20:40,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-11-28 03:20:40,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-11-28 03:20:40,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-11-28 03:20:40,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2020-11-28 03:20:40,113 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 17 [2020-11-28 03:20:40,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:20:40,113 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2020-11-28 03:20:40,113 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-28 03:20:40,113 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2020-11-28 03:20:40,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-11-28 03:20:40,114 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:20:40,114 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:20:40,114 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-11-28 03:20:40,115 INFO L429 AbstractCegarLoop]: === Iteration 8 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-28 03:20:40,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:20:40,115 INFO L82 PathProgramCache]: Analyzing trace with hash 2121234189, now seen corresponding path program 1 times [2020-11-28 03:20:40,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:20:40,115 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666439107] [2020-11-28 03:20:40,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:20:40,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:40,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:20:40,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:40,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-11-28 03:20:40,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:40,290 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:20:40,290 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666439107] [2020-11-28 03:20:40,290 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90154114] [2020-11-28 03:20:40,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_77f9a7a4-aae7-4116-98da-232ccea1378a/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 [2020-11-28 03:20:40,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:40,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-28 03:20:40,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:20:40,422 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:20:40,423 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 03:20:40,423 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2020-11-28 03:20:40,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054704080] [2020-11-28 03:20:40,424 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-28 03:20:40,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:20:40,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-28 03:20:40,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-11-28 03:20:40,425 INFO L87 Difference]: Start difference. First operand 44 states and 48 transitions. Second operand 9 states. [2020-11-28 03:20:40,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:20:40,787 INFO L93 Difference]: Finished difference Result 50 states and 53 transitions. [2020-11-28 03:20:40,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-28 03:20:40,788 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 20 [2020-11-28 03:20:40,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:20:40,789 INFO L225 Difference]: With dead ends: 50 [2020-11-28 03:20:40,790 INFO L226 Difference]: Without dead ends: 47 [2020-11-28 03:20:40,790 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-11-28 03:20:40,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-11-28 03:20:40,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 44. [2020-11-28 03:20:40,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-11-28 03:20:40,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 47 transitions. [2020-11-28 03:20:40,794 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 47 transitions. Word has length 20 [2020-11-28 03:20:40,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:20:40,795 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 47 transitions. [2020-11-28 03:20:40,795 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-28 03:20:40,795 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 47 transitions. [2020-11-28 03:20:40,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-11-28 03:20:40,796 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:20:40,796 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:20:40,996 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:20:40,997 INFO L429 AbstractCegarLoop]: === Iteration 9 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-28 03:20:40,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:20:40,997 INFO L82 PathProgramCache]: Analyzing trace with hash -1483602424, now seen corresponding path program 2 times [2020-11-28 03:20:40,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:20:40,998 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750312730] [2020-11-28 03:20:40,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:20:41,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:41,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:20:41,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:41,083 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:20:41,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750312730] [2020-11-28 03:20:41,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942831555] [2020-11-28 03:20:41,084 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_77f9a7a4-aae7-4116-98da-232ccea1378a/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 [2020-11-28 03:20:41,129 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-28 03:20:41,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 03:20:41,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-28 03:20:41,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:20:41,220 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-28 03:20:41,220 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 03:20:41,220 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2020-11-28 03:20:41,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76927484] [2020-11-28 03:20:41,221 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-28 03:20:41,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:20:41,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-28 03:20:41,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-11-28 03:20:41,222 INFO L87 Difference]: Start difference. First operand 44 states and 47 transitions. Second operand 11 states. [2020-11-28 03:20:41,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:20:41,541 INFO L93 Difference]: Finished difference Result 58 states and 63 transitions. [2020-11-28 03:20:41,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-28 03:20:41,542 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 21 [2020-11-28 03:20:41,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:20:41,543 INFO L225 Difference]: With dead ends: 58 [2020-11-28 03:20:41,543 INFO L226 Difference]: Without dead ends: 58 [2020-11-28 03:20:41,544 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2020-11-28 03:20:41,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-11-28 03:20:41,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 42. [2020-11-28 03:20:41,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-11-28 03:20:41,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 45 transitions. [2020-11-28 03:20:41,551 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 45 transitions. Word has length 21 [2020-11-28 03:20:41,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:20:41,551 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 45 transitions. [2020-11-28 03:20:41,551 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-28 03:20:41,551 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 45 transitions. [2020-11-28 03:20:41,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-11-28 03:20:41,552 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:20:41,552 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:20:41,755 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:20:41,755 INFO L429 AbstractCegarLoop]: === Iteration 10 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-28 03:20:41,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:20:41,756 INFO L82 PathProgramCache]: Analyzing trace with hash -523456178, now seen corresponding path program 2 times [2020-11-28 03:20:41,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:20:41,756 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448162079] [2020-11-28 03:20:41,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:20:41,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:41,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:20:41,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:41,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-11-28 03:20:41,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:41,958 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:20:41,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448162079] [2020-11-28 03:20:41,959 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436525252] [2020-11-28 03:20:41,959 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_77f9a7a4-aae7-4116-98da-232ccea1378a/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 [2020-11-28 03:20:42,000 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-11-28 03:20:42,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 03:20:42,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-28 03:20:42,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:20:42,052 INFO L350 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2020-11-28 03:20:42,052 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 11 [2020-11-28 03:20:42,053 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-28 03:20:42,059 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-28 03:20:42,060 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-11-28 03:20:42,061 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:9, output treesize:11 [2020-11-28 03:20:42,168 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-11-28 03:20:42,168 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-11-28 03:20:42,168 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2020-11-28 03:20:42,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4587827] [2020-11-28 03:20:42,169 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 03:20:42,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:20:42,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 03:20:42,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-11-28 03:20:42,170 INFO L87 Difference]: Start difference. First operand 42 states and 45 transitions. Second operand 4 states. [2020-11-28 03:20:42,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:20:42,197 INFO L93 Difference]: Finished difference Result 40 states and 43 transitions. [2020-11-28 03:20:42,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 03:20:42,198 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2020-11-28 03:20:42,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:20:42,199 INFO L225 Difference]: With dead ends: 40 [2020-11-28 03:20:42,199 INFO L226 Difference]: Without dead ends: 40 [2020-11-28 03:20:42,199 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-11-28 03:20:42,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-11-28 03:20:42,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-11-28 03:20:42,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-11-28 03:20:42,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2020-11-28 03:20:42,203 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 25 [2020-11-28 03:20:42,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:20:42,204 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2020-11-28 03:20:42,204 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 03:20:42,204 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2020-11-28 03:20:42,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-11-28 03:20:42,205 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:20:42,205 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:20:42,416 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:20:42,416 INFO L429 AbstractCegarLoop]: === Iteration 11 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-28 03:20:42,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:20:42,416 INFO L82 PathProgramCache]: Analyzing trace with hash -523456177, now seen corresponding path program 1 times [2020-11-28 03:20:42,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:20:42,417 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062475435] [2020-11-28 03:20:42,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:20:42,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:42,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:20:42,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:42,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-11-28 03:20:42,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:42,598 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:20:42,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062475435] [2020-11-28 03:20:42,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455558994] [2020-11-28 03:20:42,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_77f9a7a4-aae7-4116-98da-232ccea1378a/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 [2020-11-28 03:20:42,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:42,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-28 03:20:42,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:20:42,734 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:20:42,734 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 03:20:42,735 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2020-11-28 03:20:42,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250634963] [2020-11-28 03:20:42,735 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-28 03:20:42,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:20:42,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-28 03:20:42,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-11-28 03:20:42,736 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand 11 states. [2020-11-28 03:20:43,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:20:43,075 INFO L93 Difference]: Finished difference Result 52 states and 55 transitions. [2020-11-28 03:20:43,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-28 03:20:43,075 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 25 [2020-11-28 03:20:43,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:20:43,076 INFO L225 Difference]: With dead ends: 52 [2020-11-28 03:20:43,076 INFO L226 Difference]: Without dead ends: 49 [2020-11-28 03:20:43,076 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2020-11-28 03:20:43,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-11-28 03:20:43,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 45. [2020-11-28 03:20:43,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-11-28 03:20:43,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 48 transitions. [2020-11-28 03:20:43,081 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 48 transitions. Word has length 25 [2020-11-28 03:20:43,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:20:43,081 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 48 transitions. [2020-11-28 03:20:43,081 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-28 03:20:43,082 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 48 transitions. [2020-11-28 03:20:43,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-11-28 03:20:43,091 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:20:43,092 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:20:43,293 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-11-28 03:20:43,293 INFO L429 AbstractCegarLoop]: === Iteration 12 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-28 03:20:43,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:20:43,294 INFO L82 PathProgramCache]: Analyzing trace with hash -661735506, now seen corresponding path program 2 times [2020-11-28 03:20:43,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:20:43,295 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535101381] [2020-11-28 03:20:43,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:20:43,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:43,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:20:43,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:43,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-11-28 03:20:43,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:43,533 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:20:43,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535101381] [2020-11-28 03:20:43,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342859952] [2020-11-28 03:20:43,534 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_77f9a7a4-aae7-4116-98da-232ccea1378a/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 [2020-11-28 03:20:43,571 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-11-28 03:20:43,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 03:20:43,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-28 03:20:43,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:20:43,587 INFO L441 ElimStorePlain]: Different costs {0=[|v_#length_12|], 1=[|v_#valid_25|]} [2020-11-28 03:20:43,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-28 03:20:43,593 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2020-11-28 03:20:43,593 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-28 03:20:43,605 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-28 03:20:43,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-28 03:20:43,612 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 5 treesize of output 3 [2020-11-28 03:20:43,614 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-11-28 03:20:43,623 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-28 03:20:43,624 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-11-28 03:20:43,624 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:24, output treesize:17 [2020-11-28 03:20:43,752 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-11-28 03:20:43,753 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-11-28 03:20:43,753 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 10 [2020-11-28 03:20:43,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427621572] [2020-11-28 03:20:43,754 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 03:20:43,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:20:43,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 03:20:43,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-11-28 03:20:43,755 INFO L87 Difference]: Start difference. First operand 45 states and 48 transitions. Second operand 4 states. [2020-11-28 03:20:43,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:20:43,805 INFO L93 Difference]: Finished difference Result 50 states and 54 transitions. [2020-11-28 03:20:43,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 03:20:43,805 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 30 [2020-11-28 03:20:43,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:20:43,806 INFO L225 Difference]: With dead ends: 50 [2020-11-28 03:20:43,806 INFO L226 Difference]: Without dead ends: 50 [2020-11-28 03:20:43,807 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-11-28 03:20:43,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-11-28 03:20:43,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 48. [2020-11-28 03:20:43,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-11-28 03:20:43,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2020-11-28 03:20:43,811 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 30 [2020-11-28 03:20:43,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:20:43,811 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2020-11-28 03:20:43,811 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 03:20:43,812 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2020-11-28 03:20:43,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-11-28 03:20:43,819 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:20:43,820 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:20:44,041 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:20:44,041 INFO L429 AbstractCegarLoop]: === Iteration 13 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-28 03:20:44,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:20:44,041 INFO L82 PathProgramCache]: Analyzing trace with hash 494772831, now seen corresponding path program 1 times [2020-11-28 03:20:44,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:20:44,042 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657119189] [2020-11-28 03:20:44,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:20:44,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:44,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:20:44,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:44,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-11-28 03:20:44,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:44,115 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-11-28 03:20:44,116 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657119189] [2020-11-28 03:20:44,116 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058492577] [2020-11-28 03:20:44,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_77f9a7a4-aae7-4116-98da-232ccea1378a/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 [2020-11-28 03:20:44,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:44,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-28 03:20:44,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:20:44,277 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:20:44,277 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 03:20:44,277 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 10 [2020-11-28 03:20:44,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581676475] [2020-11-28 03:20:44,278 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-28 03:20:44,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:20:44,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-28 03:20:44,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-11-28 03:20:44,279 INFO L87 Difference]: Start difference. First operand 48 states and 52 transitions. Second operand 10 states. [2020-11-28 03:20:44,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:20:44,576 INFO L93 Difference]: Finished difference Result 84 states and 89 transitions. [2020-11-28 03:20:44,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-28 03:20:44,577 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 36 [2020-11-28 03:20:44,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:20:44,578 INFO L225 Difference]: With dead ends: 84 [2020-11-28 03:20:44,578 INFO L226 Difference]: Without dead ends: 81 [2020-11-28 03:20:44,578 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-11-28 03:20:44,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-11-28 03:20:44,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 60. [2020-11-28 03:20:44,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-11-28 03:20:44,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 66 transitions. [2020-11-28 03:20:44,583 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 66 transitions. Word has length 36 [2020-11-28 03:20:44,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:20:44,584 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 66 transitions. [2020-11-28 03:20:44,584 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-28 03:20:44,584 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 66 transitions. [2020-11-28 03:20:44,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-11-28 03:20:44,594 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:20:44,594 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:20:44,807 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:20:44,807 INFO L429 AbstractCegarLoop]: === Iteration 14 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-28 03:20:44,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:20:44,808 INFO L82 PathProgramCache]: Analyzing trace with hash 1980281553, now seen corresponding path program 1 times [2020-11-28 03:20:44,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:20:44,808 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740698927] [2020-11-28 03:20:44,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:20:44,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:44,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:20:44,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:44,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-11-28 03:20:44,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:45,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-11-28 03:20:45,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:45,106 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 2 proven. 126 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-11-28 03:20:45,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740698927] [2020-11-28 03:20:45,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532968714] [2020-11-28 03:20:45,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_77f9a7a4-aae7-4116-98da-232ccea1378a/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 [2020-11-28 03:20:45,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:45,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-28 03:20:45,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:20:45,315 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 95 proven. 34 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-11-28 03:20:45,315 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 03:20:45,316 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 15 [2020-11-28 03:20:45,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928564542] [2020-11-28 03:20:45,317 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-28 03:20:45,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:20:45,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-28 03:20:45,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-11-28 03:20:45,318 INFO L87 Difference]: Start difference. First operand 60 states and 66 transitions. Second operand 15 states. [2020-11-28 03:20:45,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:20:45,816 INFO L93 Difference]: Finished difference Result 72 states and 78 transitions. [2020-11-28 03:20:45,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-28 03:20:45,817 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 66 [2020-11-28 03:20:45,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:20:45,818 INFO L225 Difference]: With dead ends: 72 [2020-11-28 03:20:45,818 INFO L226 Difference]: Without dead ends: 69 [2020-11-28 03:20:45,818 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=115, Invalid=305, Unknown=0, NotChecked=0, Total=420 [2020-11-28 03:20:45,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-11-28 03:20:45,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 65. [2020-11-28 03:20:45,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-11-28 03:20:45,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 71 transitions. [2020-11-28 03:20:45,823 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 71 transitions. Word has length 66 [2020-11-28 03:20:45,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:20:45,823 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 71 transitions. [2020-11-28 03:20:45,824 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-11-28 03:20:45,824 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 71 transitions. [2020-11-28 03:20:45,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-11-28 03:20:45,830 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:20:45,830 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:20:46,040 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-11-28 03:20:46,040 INFO L429 AbstractCegarLoop]: === Iteration 15 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-28 03:20:46,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:20:46,041 INFO L82 PathProgramCache]: Analyzing trace with hash -453177461, now seen corresponding path program 2 times [2020-11-28 03:20:46,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:20:46,041 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561890180] [2020-11-28 03:20:46,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:20:46,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:46,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:20:46,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:46,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-11-28 03:20:46,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:46,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-11-28 03:20:46,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:46,468 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 2 proven. 194 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2020-11-28 03:20:46,468 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561890180] [2020-11-28 03:20:46,469 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959930429] [2020-11-28 03:20:46,469 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_77f9a7a4-aae7-4116-98da-232ccea1378a/bin/uautomizer/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:20:46,546 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-28 03:20:46,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 03:20:46,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-28 03:20:46,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:20:46,723 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 142 proven. 55 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-11-28 03:20:46,723 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 03:20:46,723 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2020-11-28 03:20:46,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584157850] [2020-11-28 03:20:46,724 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-28 03:20:46,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:20:46,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-28 03:20:46,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2020-11-28 03:20:46,725 INFO L87 Difference]: Start difference. First operand 65 states and 71 transitions. Second operand 17 states. [2020-11-28 03:20:47,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:20:47,226 INFO L93 Difference]: Finished difference Result 77 states and 83 transitions. [2020-11-28 03:20:47,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-28 03:20:47,226 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 76 [2020-11-28 03:20:47,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:20:47,227 INFO L225 Difference]: With dead ends: 77 [2020-11-28 03:20:47,228 INFO L226 Difference]: Without dead ends: 74 [2020-11-28 03:20:47,228 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=150, Invalid=402, Unknown=0, NotChecked=0, Total=552 [2020-11-28 03:20:47,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-11-28 03:20:47,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 70. [2020-11-28 03:20:47,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-11-28 03:20:47,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 76 transitions. [2020-11-28 03:20:47,233 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 76 transitions. Word has length 76 [2020-11-28 03:20:47,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:20:47,233 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 76 transitions. [2020-11-28 03:20:47,233 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-11-28 03:20:47,234 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 76 transitions. [2020-11-28 03:20:47,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-11-28 03:20:47,235 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:20:47,235 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:20:47,457 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-11-28 03:20:47,457 INFO L429 AbstractCegarLoop]: === Iteration 16 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-28 03:20:47,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:20:47,457 INFO L82 PathProgramCache]: Analyzing trace with hash -197968815, now seen corresponding path program 3 times [2020-11-28 03:20:47,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:20:47,458 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811281961] [2020-11-28 03:20:47,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:20:47,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:47,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:20:47,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:47,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-11-28 03:20:47,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:47,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-11-28 03:20:47,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:47,834 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 2 proven. 277 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2020-11-28 03:20:47,835 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811281961] [2020-11-28 03:20:47,835 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150676229] [2020-11-28 03:20:47,835 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_77f9a7a4-aae7-4116-98da-232ccea1378a/bin/uautomizer/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:20:47,904 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-11-28 03:20:47,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 03:20:47,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-28 03:20:47,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:20:47,917 INFO L441 ElimStorePlain]: Different costs {0=[|v_#length_13|], 1=[|v_#valid_26|]} [2020-11-28 03:20:47,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-28 03:20:47,924 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2020-11-28 03:20:47,924 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-28 03:20:47,936 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-28 03:20:47,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-28 03:20:47,943 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 5 treesize of output 3 [2020-11-28 03:20:47,944 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-11-28 03:20:47,957 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-28 03:20:47,958 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-28 03:20:47,958 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:24, output treesize:17 [2020-11-28 03:20:48,288 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 359 trivial. 0 not checked. [2020-11-28 03:20:48,288 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 03:20:48,289 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5] total 15 [2020-11-28 03:20:48,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648178088] [2020-11-28 03:20:48,290 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-28 03:20:48,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:20:48,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-28 03:20:48,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2020-11-28 03:20:48,291 INFO L87 Difference]: Start difference. First operand 70 states and 76 transitions. Second operand 15 states. [2020-11-28 03:20:48,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:20:48,922 INFO L93 Difference]: Finished difference Result 87 states and 94 transitions. [2020-11-28 03:20:48,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-28 03:20:48,923 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 86 [2020-11-28 03:20:48,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:20:48,924 INFO L225 Difference]: With dead ends: 87 [2020-11-28 03:20:48,924 INFO L226 Difference]: Without dead ends: 84 [2020-11-28 03:20:48,925 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 85 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=160, Invalid=392, Unknown=0, NotChecked=0, Total=552 [2020-11-28 03:20:48,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-11-28 03:20:48,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 78. [2020-11-28 03:20:48,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-11-28 03:20:48,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 85 transitions. [2020-11-28 03:20:48,930 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 85 transitions. Word has length 86 [2020-11-28 03:20:48,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:20:48,930 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 85 transitions. [2020-11-28 03:20:48,930 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-11-28 03:20:48,930 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 85 transitions. [2020-11-28 03:20:48,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-11-28 03:20:48,932 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:20:48,932 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:20:49,132 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-11-28 03:20:49,133 INFO L429 AbstractCegarLoop]: === Iteration 17 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-28 03:20:49,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:20:49,133 INFO L82 PathProgramCache]: Analyzing trace with hash -1122221700, now seen corresponding path program 2 times [2020-11-28 03:20:49,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:20:49,133 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232050579] [2020-11-28 03:20:49,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:20:49,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:49,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:20:49,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:49,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-11-28 03:20:49,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:49,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-11-28 03:20:49,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:49,300 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 491 trivial. 0 not checked. [2020-11-28 03:20:49,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232050579] [2020-11-28 03:20:49,301 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303138110] [2020-11-28 03:20:49,301 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_77f9a7a4-aae7-4116-98da-232ccea1378a/bin/uautomizer/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:20:49,343 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-11-28 03:20:49,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 03:20:49,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-28 03:20:49,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:20:49,356 INFO L441 ElimStorePlain]: Different costs {0=[|v_#length_14|], 1=[|v_#valid_27|]} [2020-11-28 03:20:49,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-28 03:20:49,365 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2020-11-28 03:20:49,366 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-28 03:20:49,376 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-28 03:20:49,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-28 03:20:49,382 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 5 treesize of output 3 [2020-11-28 03:20:49,383 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-11-28 03:20:49,388 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-28 03:20:49,388 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-11-28 03:20:49,388 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:21, output treesize:14 [2020-11-28 03:20:49,645 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2020-11-28 03:20:49,645 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-11-28 03:20:49,645 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 8 [2020-11-28 03:20:49,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664118616] [2020-11-28 03:20:49,646 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-28 03:20:49,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:20:49,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-28 03:20:49,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-11-28 03:20:49,648 INFO L87 Difference]: Start difference. First operand 78 states and 85 transitions. Second operand 5 states. [2020-11-28 03:20:49,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:20:49,711 INFO L93 Difference]: Finished difference Result 79 states and 85 transitions. [2020-11-28 03:20:49,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-28 03:20:49,712 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 102 [2020-11-28 03:20:49,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:20:49,713 INFO L225 Difference]: With dead ends: 79 [2020-11-28 03:20:49,713 INFO L226 Difference]: Without dead ends: 79 [2020-11-28 03:20:49,713 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 101 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-11-28 03:20:49,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-11-28 03:20:49,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 78. [2020-11-28 03:20:49,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-11-28 03:20:49,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 84 transitions. [2020-11-28 03:20:49,718 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 84 transitions. Word has length 102 [2020-11-28 03:20:49,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:20:49,718 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 84 transitions. [2020-11-28 03:20:49,718 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-28 03:20:49,719 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 84 transitions. [2020-11-28 03:20:49,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-11-28 03:20:49,721 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:20:49,723 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:20:49,923 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-11-28 03:20:49,924 INFO L429 AbstractCegarLoop]: === Iteration 18 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-28 03:20:49,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:20:49,924 INFO L82 PathProgramCache]: Analyzing trace with hash -81231572, now seen corresponding path program 1 times [2020-11-28 03:20:49,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:20:49,924 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148670062] [2020-11-28 03:20:49,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:20:49,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:49,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:20:49,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:49,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-11-28 03:20:49,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:50,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-11-28 03:20:50,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:50,324 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 3 proven. 375 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2020-11-28 03:20:50,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148670062] [2020-11-28 03:20:50,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276481323] [2020-11-28 03:20:50,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_77f9a7a4-aae7-4116-98da-232ccea1378a/bin/uautomizer/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:20:50,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:50,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-28 03:20:50,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:20:50,672 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 267 proven. 112 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2020-11-28 03:20:50,673 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 03:20:50,673 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2020-11-28 03:20:50,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642497766] [2020-11-28 03:20:50,674 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-28 03:20:50,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:20:50,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-28 03:20:50,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=324, Unknown=0, NotChecked=0, Total=420 [2020-11-28 03:20:50,675 INFO L87 Difference]: Start difference. First operand 78 states and 84 transitions. Second operand 21 states. [2020-11-28 03:20:51,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:20:51,349 INFO L93 Difference]: Finished difference Result 90 states and 96 transitions. [2020-11-28 03:20:51,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-28 03:20:51,350 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 105 [2020-11-28 03:20:51,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:20:51,351 INFO L225 Difference]: With dead ends: 90 [2020-11-28 03:20:51,351 INFO L226 Difference]: Without dead ends: 87 [2020-11-28 03:20:51,352 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=235, Invalid=635, Unknown=0, NotChecked=0, Total=870 [2020-11-28 03:20:51,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-11-28 03:20:51,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 83. [2020-11-28 03:20:51,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-11-28 03:20:51,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 89 transitions. [2020-11-28 03:20:51,356 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 89 transitions. Word has length 105 [2020-11-28 03:20:51,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:20:51,356 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 89 transitions. [2020-11-28 03:20:51,356 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-11-28 03:20:51,358 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 89 transitions. [2020-11-28 03:20:51,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-11-28 03:20:51,364 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:20:51,364 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:20:51,577 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-11-28 03:20:51,577 INFO L429 AbstractCegarLoop]: === Iteration 19 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-28 03:20:51,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:20:51,577 INFO L82 PathProgramCache]: Analyzing trace with hash -1970017626, now seen corresponding path program 2 times [2020-11-28 03:20:51,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:20:51,578 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750496071] [2020-11-28 03:20:51,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:20:51,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:51,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:20:51,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:51,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-11-28 03:20:51,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:52,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-11-28 03:20:52,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:52,062 INFO L134 CoverageAnalysis]: Checked inductivity of 645 backedges. 3 proven. 488 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2020-11-28 03:20:52,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750496071] [2020-11-28 03:20:52,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476913530] [2020-11-28 03:20:52,063 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_77f9a7a4-aae7-4116-98da-232ccea1378a/bin/uautomizer/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:20:52,104 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-11-28 03:20:52,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 03:20:52,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-28 03:20:52,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:20:52,227 INFO L350 Elim1Store]: treesize reduction 14, result has 50.0 percent of original size [2020-11-28 03:20:52,227 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 29 [2020-11-28 03:20:52,228 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-28 03:20:52,240 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-28 03:20:52,241 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-11-28 03:20:52,242 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:23, output treesize:15 [2020-11-28 03:20:52,488 INFO L350 Elim1Store]: treesize reduction 14, result has 50.0 percent of original size [2020-11-28 03:20:52,489 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 29 [2020-11-28 03:20:52,490 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-28 03:20:52,496 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-28 03:20:52,497 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-11-28 03:20:52,498 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:23, output treesize:15 [2020-11-28 03:20:52,813 INFO L134 CoverageAnalysis]: Checked inductivity of 645 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 645 trivial. 0 not checked. [2020-11-28 03:20:52,814 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-11-28 03:20:52,814 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [13] total 17 [2020-11-28 03:20:52,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041105649] [2020-11-28 03:20:52,816 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-28 03:20:52,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:20:52,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-28 03:20:52,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2020-11-28 03:20:52,817 INFO L87 Difference]: Start difference. First operand 83 states and 89 transitions. Second operand 6 states. [2020-11-28 03:20:52,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:20:52,919 INFO L93 Difference]: Finished difference Result 82 states and 88 transitions. [2020-11-28 03:20:52,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-28 03:20:52,919 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 115 [2020-11-28 03:20:52,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:20:52,920 INFO L225 Difference]: With dead ends: 82 [2020-11-28 03:20:52,920 INFO L226 Difference]: Without dead ends: 79 [2020-11-28 03:20:52,921 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 113 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2020-11-28 03:20:52,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-11-28 03:20:52,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 76. [2020-11-28 03:20:52,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-11-28 03:20:52,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 80 transitions. [2020-11-28 03:20:52,924 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 80 transitions. Word has length 115 [2020-11-28 03:20:52,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:20:52,925 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 80 transitions. [2020-11-28 03:20:52,925 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-28 03:20:52,925 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 80 transitions. [2020-11-28 03:20:52,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-11-28 03:20:52,926 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:20:52,926 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:20:53,149 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:20:53,149 INFO L429 AbstractCegarLoop]: === Iteration 20 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-28 03:20:53,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:20:53,149 INFO L82 PathProgramCache]: Analyzing trace with hash -940912475, now seen corresponding path program 1 times [2020-11-28 03:20:53,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:20:53,150 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262972027] [2020-11-28 03:20:53,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:20:53,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:53,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:20:53,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:53,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-11-28 03:20:53,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:53,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-11-28 03:20:53,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:53,618 INFO L134 CoverageAnalysis]: Checked inductivity of 647 backedges. 3 proven. 488 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2020-11-28 03:20:53,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262972027] [2020-11-28 03:20:53,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827261027] [2020-11-28 03:20:53,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_77f9a7a4-aae7-4116-98da-232ccea1378a/bin/uautomizer/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:20:53,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:53,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-28 03:20:53,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:20:53,972 INFO L134 CoverageAnalysis]: Checked inductivity of 647 backedges. 344 proven. 148 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-11-28 03:20:53,973 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 03:20:53,973 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 23 [2020-11-28 03:20:53,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280058960] [2020-11-28 03:20:53,974 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-28 03:20:53,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:20:53,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-28 03:20:53,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=390, Unknown=0, NotChecked=0, Total=506 [2020-11-28 03:20:53,976 INFO L87 Difference]: Start difference. First operand 76 states and 80 transitions. Second operand 23 states. [2020-11-28 03:20:54,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:20:54,730 INFO L93 Difference]: Finished difference Result 88 states and 92 transitions. [2020-11-28 03:20:54,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-28 03:20:54,731 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 116 [2020-11-28 03:20:54,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:20:54,731 INFO L225 Difference]: With dead ends: 88 [2020-11-28 03:20:54,732 INFO L226 Difference]: Without dead ends: 85 [2020-11-28 03:20:54,732 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=285, Invalid=771, Unknown=0, NotChecked=0, Total=1056 [2020-11-28 03:20:54,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-11-28 03:20:54,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 81. [2020-11-28 03:20:54,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-11-28 03:20:54,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 85 transitions. [2020-11-28 03:20:54,736 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 85 transitions. Word has length 116 [2020-11-28 03:20:54,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:20:54,736 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 85 transitions. [2020-11-28 03:20:54,736 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-11-28 03:20:54,737 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 85 transitions. [2020-11-28 03:20:54,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-11-28 03:20:54,738 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:20:54,738 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:20:54,957 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:20:54,957 INFO L429 AbstractCegarLoop]: === Iteration 21 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-28 03:20:54,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:20:54,957 INFO L82 PathProgramCache]: Analyzing trace with hash -431416353, now seen corresponding path program 2 times [2020-11-28 03:20:54,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:20:54,958 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348769040] [2020-11-28 03:20:54,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:20:54,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:55,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:20:55,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:55,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-11-28 03:20:55,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:55,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-11-28 03:20:55,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:55,412 INFO L134 CoverageAnalysis]: Checked inductivity of 816 backedges. 3 proven. 616 refuted. 0 times theorem prover too weak. 197 trivial. 0 not checked. [2020-11-28 03:20:55,412 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348769040] [2020-11-28 03:20:55,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194579383] [2020-11-28 03:20:55,413 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_77f9a7a4-aae7-4116-98da-232ccea1378a/bin/uautomizer/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:20:55,535 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-28 03:20:55,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 03:20:55,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-28 03:20:55,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:20:55,862 INFO L134 CoverageAnalysis]: Checked inductivity of 816 backedges. 431 proven. 189 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2020-11-28 03:20:55,863 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 03:20:55,863 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 25 [2020-11-28 03:20:55,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790267447] [2020-11-28 03:20:55,865 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-11-28 03:20:55,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:20:55,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-11-28 03:20:55,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=462, Unknown=0, NotChecked=0, Total=600 [2020-11-28 03:20:55,867 INFO L87 Difference]: Start difference. First operand 81 states and 85 transitions. Second operand 25 states. [2020-11-28 03:20:56,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:20:56,670 INFO L93 Difference]: Finished difference Result 93 states and 97 transitions. [2020-11-28 03:20:56,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-11-28 03:20:56,671 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 126 [2020-11-28 03:20:56,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:20:56,671 INFO L225 Difference]: With dead ends: 93 [2020-11-28 03:20:56,672 INFO L226 Difference]: Without dead ends: 90 [2020-11-28 03:20:56,673 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=340, Invalid=920, Unknown=0, NotChecked=0, Total=1260 [2020-11-28 03:20:56,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-11-28 03:20:56,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 86. [2020-11-28 03:20:56,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-11-28 03:20:56,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 90 transitions. [2020-11-28 03:20:56,676 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 90 transitions. Word has length 126 [2020-11-28 03:20:56,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:20:56,677 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 90 transitions. [2020-11-28 03:20:56,677 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-11-28 03:20:56,677 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 90 transitions. [2020-11-28 03:20:56,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-11-28 03:20:56,678 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:20:56,678 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:20:56,889 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-11-28 03:20:56,889 INFO L429 AbstractCegarLoop]: === Iteration 22 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-28 03:20:56,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:20:56,889 INFO L82 PathProgramCache]: Analyzing trace with hash -138765787, now seen corresponding path program 3 times [2020-11-28 03:20:56,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:20:56,889 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530405695] [2020-11-28 03:20:56,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:20:56,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:56,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:20:56,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:56,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-11-28 03:20:56,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:57,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2020-11-28 03:20:57,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:57,493 INFO L134 CoverageAnalysis]: Checked inductivity of 1005 backedges. 3 proven. 759 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2020-11-28 03:20:57,493 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530405695] [2020-11-28 03:20:57,493 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413123951] [2020-11-28 03:20:57,493 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_77f9a7a4-aae7-4116-98da-232ccea1378a/bin/uautomizer/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:20:57,550 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-11-28 03:20:57,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 03:20:57,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-28 03:20:57,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:20:57,769 INFO L134 CoverageAnalysis]: Checked inductivity of 1005 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 999 trivial. 0 not checked. [2020-11-28 03:20:57,770 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 03:20:57,770 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 7] total 21 [2020-11-28 03:20:57,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072871284] [2020-11-28 03:20:57,771 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-28 03:20:57,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:20:57,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-28 03:20:57,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=314, Unknown=0, NotChecked=0, Total=420 [2020-11-28 03:20:57,772 INFO L87 Difference]: Start difference. First operand 86 states and 90 transitions. Second operand 21 states. [2020-11-28 03:20:58,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:20:58,625 INFO L93 Difference]: Finished difference Result 109 states and 114 transitions. [2020-11-28 03:20:58,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-11-28 03:20:58,629 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 136 [2020-11-28 03:20:58,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:20:58,630 INFO L225 Difference]: With dead ends: 109 [2020-11-28 03:20:58,630 INFO L226 Difference]: Without dead ends: 106 [2020-11-28 03:20:58,630 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=302, Invalid=888, Unknown=0, NotChecked=0, Total=1190 [2020-11-28 03:20:58,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-11-28 03:20:58,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 95. [2020-11-28 03:20:58,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-11-28 03:20:58,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 99 transitions. [2020-11-28 03:20:58,634 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 99 transitions. Word has length 136 [2020-11-28 03:20:58,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:20:58,635 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 99 transitions. [2020-11-28 03:20:58,635 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-11-28 03:20:58,635 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 99 transitions. [2020-11-28 03:20:58,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-11-28 03:20:58,640 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:20:58,641 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:20:58,857 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:20:58,857 INFO L429 AbstractCegarLoop]: === Iteration 23 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-28 03:20:58,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:20:58,857 INFO L82 PathProgramCache]: Analyzing trace with hash 16497858, now seen corresponding path program 4 times [2020-11-28 03:20:58,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:20:58,858 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606378950] [2020-11-28 03:20:58,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:20:58,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:58,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:20:58,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:58,915 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-11-28 03:20:58,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:59,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-11-28 03:20:59,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:59,548 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 3 proven. 917 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2020-11-28 03:20:59,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606378950] [2020-11-28 03:20:59,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054923269] [2020-11-28 03:20:59,548 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_77f9a7a4-aae7-4116-98da-232ccea1378a/bin/uautomizer/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:20:59,669 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-28 03:20:59,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 03:20:59,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-28 03:20:59,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:21:00,128 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 635 proven. 286 refuted. 0 times theorem prover too weak. 299 trivial. 0 not checked. [2020-11-28 03:21:00,129 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 03:21:00,129 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 29 [2020-11-28 03:21:00,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493767654] [2020-11-28 03:21:00,131 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-11-28 03:21:00,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:21:00,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-11-28 03:21:00,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=624, Unknown=0, NotChecked=0, Total=812 [2020-11-28 03:21:00,133 INFO L87 Difference]: Start difference. First operand 95 states and 99 transitions. Second operand 29 states. [2020-11-28 03:21:01,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:21:01,293 INFO L93 Difference]: Finished difference Result 107 states and 111 transitions. [2020-11-28 03:21:01,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-28 03:21:01,293 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 150 [2020-11-28 03:21:01,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:21:01,294 INFO L225 Difference]: With dead ends: 107 [2020-11-28 03:21:01,295 INFO L226 Difference]: Without dead ends: 104 [2020-11-28 03:21:01,295 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=465, Invalid=1257, Unknown=0, NotChecked=0, Total=1722 [2020-11-28 03:21:01,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-11-28 03:21:01,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 100. [2020-11-28 03:21:01,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-11-28 03:21:01,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 104 transitions. [2020-11-28 03:21:01,300 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 104 transitions. Word has length 150 [2020-11-28 03:21:01,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:21:01,301 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 104 transitions. [2020-11-28 03:21:01,301 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-11-28 03:21:01,301 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 104 transitions. [2020-11-28 03:21:01,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-11-28 03:21:01,303 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:21:01,304 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:21:01,517 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-11-28 03:21:01,517 INFO L429 AbstractCegarLoop]: === Iteration 24 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-28 03:21:01,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:21:01,517 INFO L82 PathProgramCache]: Analyzing trace with hash -846233464, now seen corresponding path program 5 times [2020-11-28 03:21:01,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:21:01,518 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577163984] [2020-11-28 03:21:01,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:21:01,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:21:01,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:21:01,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:21:01,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-11-28 03:21:01,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:21:02,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2020-11-28 03:21:02,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:21:02,126 INFO L134 CoverageAnalysis]: Checked inductivity of 1449 backedges. 3 proven. 1090 refuted. 0 times theorem prover too weak. 356 trivial. 0 not checked. [2020-11-28 03:21:02,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577163984] [2020-11-28 03:21:02,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453117454] [2020-11-28 03:21:02,127 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_77f9a7a4-aae7-4116-98da-232ccea1378a/bin/uautomizer/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:21:02,246 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2020-11-28 03:21:02,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 03:21:02,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 16 conjunts are in the unsatisfiable core [2020-11-28 03:21:02,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:21:02,845 INFO L134 CoverageAnalysis]: Checked inductivity of 1449 backedges. 752 proven. 342 refuted. 0 times theorem prover too weak. 355 trivial. 0 not checked. [2020-11-28 03:21:02,846 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 03:21:02,846 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 31 [2020-11-28 03:21:02,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270059104] [2020-11-28 03:21:02,847 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-11-28 03:21:02,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:21:02,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-11-28 03:21:02,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=714, Unknown=0, NotChecked=0, Total=930 [2020-11-28 03:21:02,848 INFO L87 Difference]: Start difference. First operand 100 states and 104 transitions. Second operand 31 states. [2020-11-28 03:21:03,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:21:03,817 INFO L93 Difference]: Finished difference Result 112 states and 116 transitions. [2020-11-28 03:21:03,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-11-28 03:21:03,817 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 160 [2020-11-28 03:21:03,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:21:03,818 INFO L225 Difference]: With dead ends: 112 [2020-11-28 03:21:03,819 INFO L226 Difference]: Without dead ends: 109 [2020-11-28 03:21:03,819 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=535, Invalid=1445, Unknown=0, NotChecked=0, Total=1980 [2020-11-28 03:21:03,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-11-28 03:21:03,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 105. [2020-11-28 03:21:03,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-11-28 03:21:03,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 109 transitions. [2020-11-28 03:21:03,824 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 109 transitions. Word has length 160 [2020-11-28 03:21:03,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:21:03,824 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 109 transitions. [2020-11-28 03:21:03,824 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-11-28 03:21:03,824 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 109 transitions. [2020-11-28 03:21:03,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2020-11-28 03:21:03,826 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:21:03,826 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:21:04,045 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-11-28 03:21:04,045 INFO L429 AbstractCegarLoop]: === Iteration 25 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-28 03:21:04,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:21:04,045 INFO L82 PathProgramCache]: Analyzing trace with hash 609725890, now seen corresponding path program 6 times [2020-11-28 03:21:04,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:21:04,046 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873547413] [2020-11-28 03:21:04,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:21:04,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:21:04,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:21:04,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:21:04,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-11-28 03:21:04,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:21:04,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-11-28 03:21:04,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:21:04,699 INFO L134 CoverageAnalysis]: Checked inductivity of 1698 backedges. 3 proven. 1278 refuted. 0 times theorem prover too weak. 417 trivial. 0 not checked. [2020-11-28 03:21:04,699 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873547413] [2020-11-28 03:21:04,699 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563488419] [2020-11-28 03:21:04,700 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_77f9a7a4-aae7-4116-98da-232ccea1378a/bin/uautomizer/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:21:04,761 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-11-28 03:21:04,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 03:21:04,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-28 03:21:04,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:21:04,768 INFO L441 ElimStorePlain]: Different costs {0=[|v_#length_15|], 1=[|v_#valid_30|]} [2020-11-28 03:21:04,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-28 03:21:04,794 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2020-11-28 03:21:04,794 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-28 03:21:04,829 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-28 03:21:04,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-28 03:21:04,834 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 5 treesize of output 3 [2020-11-28 03:21:04,837 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-11-28 03:21:04,845 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-28 03:21:04,845 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-11-28 03:21:04,846 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:21, output treesize:14 [2020-11-28 03:21:05,316 INFO L134 CoverageAnalysis]: Checked inductivity of 1698 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1692 trivial. 0 not checked. [2020-11-28 03:21:05,317 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-11-28 03:21:05,317 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [18] total 23 [2020-11-28 03:21:05,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071728381] [2020-11-28 03:21:05,317 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-28 03:21:05,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:21:05,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-28 03:21:05,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=362, Unknown=0, NotChecked=0, Total=506 [2020-11-28 03:21:05,318 INFO L87 Difference]: Start difference. First operand 105 states and 109 transitions. Second operand 7 states. [2020-11-28 03:21:05,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:21:05,378 INFO L93 Difference]: Finished difference Result 103 states and 107 transitions. [2020-11-28 03:21:05,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-28 03:21:05,379 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 170 [2020-11-28 03:21:05,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:21:05,380 INFO L225 Difference]: With dead ends: 103 [2020-11-28 03:21:05,380 INFO L226 Difference]: Without dead ends: 0 [2020-11-28 03:21:05,380 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 167 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=144, Invalid=362, Unknown=0, NotChecked=0, Total=506 [2020-11-28 03:21:05,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-28 03:21:05,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-28 03:21:05,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-28 03:21:05,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-28 03:21:05,381 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 170 [2020-11-28 03:21:05,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:21:05,381 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-28 03:21:05,381 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-28 03:21:05,381 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-28 03:21:05,381 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-28 03:21:05,582 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-11-28 03:21:05,585 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 03:21:05 BoogieIcfgContainer [2020-11-28 03:21:05,586 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-28 03:21:05,586 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-28 03:21:05,586 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-28 03:21:05,586 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-28 03:21:05,587 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:20:37" (3/4) ... [2020-11-28 03:21:05,590 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-28 03:21:05,595 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2020-11-28 03:21:05,596 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure foo [2020-11-28 03:21:05,596 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2020-11-28 03:21:05,601 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 16 nodes and edges [2020-11-28 03:21:05,601 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 10 nodes and edges [2020-11-28 03:21:05,601 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2020-11-28 03:21:05,601 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-28 03:21:05,665 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_77f9a7a4-aae7-4116-98da-232ccea1378a/bin/uautomizer/witness.graphml [2020-11-28 03:21:05,665 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-28 03:21:05,666 INFO L168 Benchmark]: Toolchain (without parser) took 29492.16 ms. Allocated memory was 109.1 MB in the beginning and 281.0 MB in the end (delta: 172.0 MB). Free memory was 73.8 MB in the beginning and 124.5 MB in the end (delta: -50.7 MB). Peak memory consumption was 120.8 MB. Max. memory is 16.1 GB. [2020-11-28 03:21:05,667 INFO L168 Benchmark]: CDTParser took 0.87 ms. Allocated memory is still 109.1 MB. Free memory was 81.7 MB in the beginning and 81.7 MB in the end (delta: 31.5 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 03:21:05,667 INFO L168 Benchmark]: CACSL2BoogieTranslator took 264.37 ms. Allocated memory is still 109.1 MB. Free memory was 73.6 MB in the beginning and 84.9 MB in the end (delta: -11.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-28 03:21:05,671 INFO L168 Benchmark]: Boogie Preprocessor took 62.28 ms. Allocated memory is still 109.1 MB. Free memory was 84.9 MB in the beginning and 83.7 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 03:21:05,671 INFO L168 Benchmark]: RCFGBuilder took 577.97 ms. Allocated memory is still 109.1 MB. Free memory was 83.7 MB in the beginning and 68.3 MB in the end (delta: 15.4 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. [2020-11-28 03:21:05,672 INFO L168 Benchmark]: TraceAbstraction took 28499.81 ms. Allocated memory was 109.1 MB in the beginning and 281.0 MB in the end (delta: 172.0 MB). Free memory was 67.7 MB in the beginning and 126.3 MB in the end (delta: -58.6 MB). Peak memory consumption was 115.2 MB. Max. memory is 16.1 GB. [2020-11-28 03:21:05,672 INFO L168 Benchmark]: Witness Printer took 79.48 ms. Allocated memory is still 281.0 MB. Free memory was 126.3 MB in the beginning and 124.5 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 03:21:05,674 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.87 ms. Allocated memory is still 109.1 MB. Free memory was 81.7 MB in the beginning and 81.7 MB in the end (delta: 31.5 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 264.37 ms. Allocated memory is still 109.1 MB. Free memory was 73.6 MB in the beginning and 84.9 MB in the end (delta: -11.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 62.28 ms. Allocated memory is still 109.1 MB. Free memory was 84.9 MB in the beginning and 83.7 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 577.97 ms. Allocated memory is still 109.1 MB. Free memory was 83.7 MB in the beginning and 68.3 MB in the end (delta: 15.4 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. * TraceAbstraction took 28499.81 ms. Allocated memory was 109.1 MB in the beginning and 281.0 MB in the end (delta: 172.0 MB). Free memory was 67.7 MB in the beginning and 126.3 MB in the end (delta: -58.6 MB). Peak memory consumption was 115.2 MB. Max. memory is 16.1 GB. * Witness Printer took 79.48 ms. Allocated memory is still 281.0 MB. Free memory was 126.3 MB in the beginning and 124.5 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 16]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 16]: array index is always in bounds For all program executions holds that array index is always in bounds at this location - PositiveResult [Line: 16]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 29]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 29]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 21]: all allocated memory was freed For all program executions holds that all allocated memory was freed 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 - AllSpecificationsHoldResult: All specifications hold 8 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 40 locations, 8 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 28.4s, OverallIterations: 25, TraceHistogramMax: 26, AutomataDifference: 9.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 621 SDtfs, 1816 SDslu, 3405 SDs, 0 SdLazy, 3377 SolverSat, 267 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1980 GetRequests, 1548 SyntacticMatches, 14 SemanticMatches, 418 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1718 ImplicationChecksByTransitivity, 13.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=105occurred in iteration=24, 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, 25 MinimizatonAttempts, 132 StatesRemovedByMinimization, 21 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 0.9s SatisfiabilityAnalysisTime, 11.6s InterpolantComputationTime, 3239 NumberOfCodeBlocks, 2689 NumberOfCodeBlocksAsserted, 64 NumberOfCheckSat, 3195 ConstructedInterpolants, 462 QuantifiedInterpolants, 2351984 SizeOfPredicates, 31 NumberOfNonLiveVariables, 3127 ConjunctsInSsa, 168 ConjunctsInUnsatCore, 44 InterpolantComputations, 11 PerfectInterpolantSequences, 10777/18637 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...