./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/ldv-memsafety/ArraysWithLenghtAtDeclaration.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_68156a7c-eb4c-40bb-a179-dcd99bdae26f/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_68156a7c-eb4c-40bb-a179-dcd99bdae26f/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_68156a7c-eb4c-40bb-a179-dcd99bdae26f/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_68156a7c-eb4c-40bb-a179-dcd99bdae26f/bin/uautomizer/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/ArraysWithLenghtAtDeclaration.c -s /tmp/vcloud-vcloud-master/worker/run_dir_68156a7c-eb4c-40bb-a179-dcd99bdae26f/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_68156a7c-eb4c-40bb-a179-dcd99bdae26f/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 56b28f59847d63942ec468b0c95f39e5b8c0763a .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-29 20:37:35,420 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-29 20:37:35,422 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-29 20:37:35,470 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-29 20:37:35,472 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-29 20:37:35,476 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-29 20:37:35,479 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-29 20:37:35,491 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-29 20:37:35,494 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-29 20:37:35,499 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-29 20:37:35,511 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-29 20:37:35,513 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-29 20:37:35,513 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-29 20:37:35,514 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-29 20:37:35,515 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-29 20:37:35,516 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-29 20:37:35,517 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-29 20:37:35,518 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-29 20:37:35,520 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-29 20:37:35,523 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-29 20:37:35,525 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-29 20:37:35,527 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-29 20:37:35,528 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-29 20:37:35,529 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-29 20:37:35,532 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-29 20:37:35,533 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-29 20:37:35,533 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-29 20:37:35,534 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-29 20:37:35,535 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-29 20:37:35,536 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-29 20:37:35,537 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-29 20:37:35,538 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-29 20:37:35,539 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-29 20:37:35,539 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-29 20:37:35,541 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-29 20:37:35,541 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-29 20:37:35,542 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-29 20:37:35,542 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-29 20:37:35,542 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-29 20:37:35,543 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-29 20:37:35,544 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-29 20:37:35,545 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_68156a7c-eb4c-40bb-a179-dcd99bdae26f/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2020-11-29 20:37:35,575 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-29 20:37:35,576 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-29 20:37:35,577 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-29 20:37:35,577 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-29 20:37:35,577 INFO L138 SettingsManager]: * Use SBE=true [2020-11-29 20:37:35,577 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-29 20:37:35,578 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-29 20:37:35,578 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-11-29 20:37:35,578 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-29 20:37:35,578 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-29 20:37:35,578 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-29 20:37:35,579 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-11-29 20:37:35,579 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-11-29 20:37:35,579 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-11-29 20:37:35,579 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-29 20:37:35,579 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-29 20:37:35,579 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-29 20:37:35,580 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-29 20:37:35,580 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-29 20:37:35,580 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-29 20:37:35,580 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-29 20:37:35,580 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-29 20:37:35,581 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-29 20:37:35,581 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-29 20:37:35,581 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-29 20:37:35,581 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-29 20:37:35,581 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-29 20:37:35,581 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-29 20:37:35,582 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_68156a7c-eb4c-40bb-a179-dcd99bdae26f/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_68156a7c-eb4c-40bb-a179-dcd99bdae26f/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 56b28f59847d63942ec468b0c95f39e5b8c0763a [2020-11-29 20:37:35,857 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-29 20:37:35,899 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-29 20:37:35,901 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-29 20:37:35,903 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-29 20:37:35,903 INFO L275 PluginConnector]: CDTParser initialized [2020-11-29 20:37:35,904 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_68156a7c-eb4c-40bb-a179-dcd99bdae26f/bin/uautomizer/../../sv-benchmarks/c/ldv-memsafety/ArraysWithLenghtAtDeclaration.c [2020-11-29 20:37:35,992 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_68156a7c-eb4c-40bb-a179-dcd99bdae26f/bin/uautomizer/data/dffc06466/5d70d6e3ebba437badda68bd90361f40/FLAGe253ed94b [2020-11-29 20:37:36,475 INFO L306 CDTParser]: Found 1 translation units. [2020-11-29 20:37:36,476 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_68156a7c-eb4c-40bb-a179-dcd99bdae26f/sv-benchmarks/c/ldv-memsafety/ArraysWithLenghtAtDeclaration.c [2020-11-29 20:37:36,481 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_68156a7c-eb4c-40bb-a179-dcd99bdae26f/bin/uautomizer/data/dffc06466/5d70d6e3ebba437badda68bd90361f40/FLAGe253ed94b [2020-11-29 20:37:36,835 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_68156a7c-eb4c-40bb-a179-dcd99bdae26f/bin/uautomizer/data/dffc06466/5d70d6e3ebba437badda68bd90361f40 [2020-11-29 20:37:36,837 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-29 20:37:36,838 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-11-29 20:37:36,839 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-29 20:37:36,850 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-29 20:37:36,853 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-29 20:37:36,854 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 08:37:36" (1/1) ... [2020-11-29 20:37:36,856 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@24e8319a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:37:36, skipping insertion in model container [2020-11-29 20:37:36,856 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 08:37:36" (1/1) ... [2020-11-29 20:37:36,863 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-29 20:37:36,874 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-29 20:37:37,054 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 20:37:37,062 INFO L203 MainTranslator]: Completed pre-run [2020-11-29 20:37:37,079 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 20:37:37,094 INFO L208 MainTranslator]: Completed translation [2020-11-29 20:37:37,094 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:37:37 WrapperNode [2020-11-29 20:37:37,095 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-29 20:37:37,096 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-29 20:37:37,096 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-29 20:37:37,096 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-29 20:37:37,109 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:37:37" (1/1) ... [2020-11-29 20:37:37,109 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:37:37" (1/1) ... [2020-11-29 20:37:37,116 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:37:37" (1/1) ... [2020-11-29 20:37:37,116 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:37:37" (1/1) ... [2020-11-29 20:37:37,124 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:37:37" (1/1) ... [2020-11-29 20:37:37,129 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:37:37" (1/1) ... [2020-11-29 20:37:37,130 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:37:37" (1/1) ... [2020-11-29 20:37:37,132 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-29 20:37:37,134 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-29 20:37:37,134 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-29 20:37:37,134 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-29 20:37:37,135 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:37:37" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_68156a7c-eb4c-40bb-a179-dcd99bdae26f/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-29 20:37:37,229 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-29 20:37:37,229 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-29 20:37:37,230 INFO L138 BoogieDeclarations]: Found implementation of procedure foo [2020-11-29 20:37:37,230 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-29 20:37:37,230 INFO L130 BoogieDeclarations]: Found specification of procedure foo [2020-11-29 20:37:37,230 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-29 20:37:37,231 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-29 20:37:37,232 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-29 20:37:37,232 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-29 20:37:37,232 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-29 20:37:37,234 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-29 20:37:37,235 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-29 20:37:37,790 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-29 20:37:37,790 INFO L298 CfgBuilder]: Removed 3 assume(true) statements. [2020-11-29 20:37:37,791 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 08:37:37 BoogieIcfgContainer [2020-11-29 20:37:37,791 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-29 20:37:37,795 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-29 20:37:37,795 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-29 20:37:37,801 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-29 20:37:37,802 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 08:37:36" (1/3) ... [2020-11-29 20:37:37,804 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@affb5e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 08:37:37, skipping insertion in model container [2020-11-29 20:37:37,804 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:37:37" (2/3) ... [2020-11-29 20:37:37,804 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@affb5e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 08:37:37, skipping insertion in model container [2020-11-29 20:37:37,805 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 08:37:37" (3/3) ... [2020-11-29 20:37:37,807 INFO L111 eAbstractionObserver]: Analyzing ICFG ArraysWithLenghtAtDeclaration.c [2020-11-29 20:37:37,819 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-29 20:37:37,824 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 8 error locations. [2020-11-29 20:37:37,837 INFO L253 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2020-11-29 20:37:37,859 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-29 20:37:37,859 INFO L378 AbstractCegarLoop]: Hoare is false [2020-11-29 20:37:37,860 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-29 20:37:37,860 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-29 20:37:37,860 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-29 20:37:37,860 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-29 20:37:37,860 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-29 20:37:37,860 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-29 20:37:37,875 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states. [2020-11-29 20:37:37,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-29 20:37:37,884 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:37:37,885 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:37:37,885 INFO L429 AbstractCegarLoop]: === Iteration 1 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-29 20:37:37,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:37:37,892 INFO L82 PathProgramCache]: Analyzing trace with hash 1909189377, now seen corresponding path program 1 times [2020-11-29 20:37:37,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:37:37,902 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495831251] [2020-11-29 20:37:37,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:37:38,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:37:38,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 20:37:38,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:37:38,101 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:37:38,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495831251] [2020-11-29 20:37:38,104 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 20:37:38,105 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-29 20:37:38,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844064058] [2020-11-29 20:37:38,111 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-29 20:37:38,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:37:38,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 20:37:38,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-29 20:37:38,137 INFO L87 Difference]: Start difference. First operand 40 states. Second operand 4 states. [2020-11-29 20:37:38,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:37:38,401 INFO L93 Difference]: Finished difference Result 58 states and 63 transitions. [2020-11-29 20:37:38,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-29 20:37:38,404 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-11-29 20:37:38,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:37:38,418 INFO L225 Difference]: With dead ends: 58 [2020-11-29 20:37:38,419 INFO L226 Difference]: Without dead ends: 54 [2020-11-29 20:37:38,422 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-29 20:37:38,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-11-29 20:37:38,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 39. [2020-11-29 20:37:38,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-11-29 20:37:38,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2020-11-29 20:37:38,463 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 10 [2020-11-29 20:37:38,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:37:38,463 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2020-11-29 20:37:38,463 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-29 20:37:38,463 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2020-11-29 20:37:38,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-29 20:37:38,464 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:37:38,464 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:37:38,464 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-29 20:37:38,465 INFO L429 AbstractCegarLoop]: === Iteration 2 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-29 20:37:38,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:37:38,465 INFO L82 PathProgramCache]: Analyzing trace with hash -941983064, now seen corresponding path program 1 times [2020-11-29 20:37:38,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:37:38,466 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228624110] [2020-11-29 20:37:38,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:37:38,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:37:38,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 20:37:38,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:37:38,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:37:38,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228624110] [2020-11-29 20:37:38,540 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 20:37:38,540 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-29 20:37:38,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954986374] [2020-11-29 20:37:38,542 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-29 20:37:38,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:37:38,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 20:37:38,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-29 20:37:38,543 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand 4 states. [2020-11-29 20:37:38,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:37:38,704 INFO L93 Difference]: Finished difference Result 49 states and 53 transitions. [2020-11-29 20:37:38,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 20:37:38,706 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2020-11-29 20:37:38,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:37:38,708 INFO L225 Difference]: With dead ends: 49 [2020-11-29 20:37:38,708 INFO L226 Difference]: Without dead ends: 49 [2020-11-29 20:37:38,709 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 [2020-11-29 20:37:38,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-11-29 20:37:38,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 41. [2020-11-29 20:37:38,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-11-29 20:37:38,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2020-11-29 20:37:38,724 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 11 [2020-11-29 20:37:38,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:37:38,725 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2020-11-29 20:37:38,726 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-29 20:37:38,726 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2020-11-29 20:37:38,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-29 20:37:38,729 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:37:38,729 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:37:38,730 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-29 20:37:38,731 INFO L429 AbstractCegarLoop]: === Iteration 3 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-29 20:37:38,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:37:38,733 INFO L82 PathProgramCache]: Analyzing trace with hash 863296133, now seen corresponding path program 1 times [2020-11-29 20:37:38,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:37:38,734 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568709517] [2020-11-29 20:37:38,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:37:38,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:37:38,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 20:37:38,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:37:38,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:37:38,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568709517] [2020-11-29 20:37:38,837 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 20:37:38,838 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-29 20:37:38,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758481555] [2020-11-29 20:37:38,841 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-29 20:37:38,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:37:38,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-29 20:37:38,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-29 20:37:38,845 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand 6 states. [2020-11-29 20:37:39,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:37:39,001 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2020-11-29 20:37:39,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-29 20:37:39,002 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2020-11-29 20:37:39,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:37:39,003 INFO L225 Difference]: With dead ends: 40 [2020-11-29 20:37:39,004 INFO L226 Difference]: Without dead ends: 40 [2020-11-29 20:37:39,004 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 [2020-11-29 20:37:39,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-11-29 20:37:39,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-11-29 20:37:39,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-11-29 20:37:39,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2020-11-29 20:37:39,024 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 12 [2020-11-29 20:37:39,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:37:39,024 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2020-11-29 20:37:39,025 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-29 20:37:39,025 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2020-11-29 20:37:39,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-29 20:37:39,026 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:37:39,026 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:37:39,026 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-29 20:37:39,026 INFO L429 AbstractCegarLoop]: === Iteration 4 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-29 20:37:39,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:37:39,028 INFO L82 PathProgramCache]: Analyzing trace with hash 863296134, now seen corresponding path program 1 times [2020-11-29 20:37:39,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:37:39,029 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116580566] [2020-11-29 20:37:39,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:37:39,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:37:39,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 20:37:39,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:37:39,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:37:39,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116580566] [2020-11-29 20:37:39,202 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 20:37:39,202 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-29 20:37:39,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590617521] [2020-11-29 20:37:39,203 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-29 20:37:39,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:37:39,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-29 20:37:39,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-29 20:37:39,204 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand 6 states. [2020-11-29 20:37:39,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:37:39,440 INFO L93 Difference]: Finished difference Result 46 states and 50 transitions. [2020-11-29 20:37:39,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-29 20:37:39,440 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2020-11-29 20:37:39,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:37:39,442 INFO L225 Difference]: With dead ends: 46 [2020-11-29 20:37:39,442 INFO L226 Difference]: Without dead ends: 46 [2020-11-29 20:37:39,442 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 [2020-11-29 20:37:39,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-11-29 20:37:39,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 41. [2020-11-29 20:37:39,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-11-29 20:37:39,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2020-11-29 20:37:39,448 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 12 [2020-11-29 20:37:39,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:37:39,449 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2020-11-29 20:37:39,449 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-29 20:37:39,449 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2020-11-29 20:37:39,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-29 20:37:39,453 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:37:39,453 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:37:39,453 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-29 20:37:39,454 INFO L429 AbstractCegarLoop]: === Iteration 5 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-29 20:37:39,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:37:39,454 INFO L82 PathProgramCache]: Analyzing trace with hash 143250926, now seen corresponding path program 1 times [2020-11-29 20:37:39,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:37:39,456 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86623293] [2020-11-29 20:37:39,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:37:39,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:37:39,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 20:37:39,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:37:39,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-11-29 20:37:39,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:37:39,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:37:39,594 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86623293] [2020-11-29 20:37:39,595 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 20:37:39,595 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-29 20:37:39,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671007066] [2020-11-29 20:37:39,595 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-29 20:37:39,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:37:39,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-29 20:37:39,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-29 20:37:39,597 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand 6 states. [2020-11-29 20:37:39,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:37:39,836 INFO L93 Difference]: Finished difference Result 61 states and 66 transitions. [2020-11-29 20:37:39,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-29 20:37:39,837 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-11-29 20:37:39,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:37:39,839 INFO L225 Difference]: With dead ends: 61 [2020-11-29 20:37:39,839 INFO L226 Difference]: Without dead ends: 61 [2020-11-29 20:37:39,839 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-11-29 20:37:39,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-11-29 20:37:39,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 45. [2020-11-29 20:37:39,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-11-29 20:37:39,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 50 transitions. [2020-11-29 20:37:39,860 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 50 transitions. Word has length 15 [2020-11-29 20:37:39,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:37:39,861 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 50 transitions. [2020-11-29 20:37:39,861 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-29 20:37:39,861 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 50 transitions. [2020-11-29 20:37:39,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-29 20:37:39,862 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:37:39,862 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:37:39,862 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-29 20:37:39,862 INFO L429 AbstractCegarLoop]: === Iteration 6 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-29 20:37:39,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:37:39,863 INFO L82 PathProgramCache]: Analyzing trace with hash 1623425863, now seen corresponding path program 1 times [2020-11-29 20:37:39,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:37:39,863 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908409201] [2020-11-29 20:37:39,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:37:39,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:37:39,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 20:37:39,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:37:39,962 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:37:39,962 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908409201] [2020-11-29 20:37:39,962 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769243688] [2020-11-29 20:37:39,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_68156a7c-eb4c-40bb-a179-dcd99bdae26f/bin/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:37:40,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:37:40,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-29 20:37:40,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:37:40,346 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:37:40,347 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-11-29 20:37:40,347 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 11 [2020-11-29 20:37:40,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020314318] [2020-11-29 20:37:40,348 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-29 20:37:40,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:37:40,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-29 20:37:40,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-11-29 20:37:40,349 INFO L87 Difference]: Start difference. First operand 45 states and 50 transitions. Second operand 6 states. [2020-11-29 20:37:40,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:37:40,490 INFO L93 Difference]: Finished difference Result 72 states and 76 transitions. [2020-11-29 20:37:40,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-29 20:37:40,491 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-11-29 20:37:40,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:37:40,492 INFO L225 Difference]: With dead ends: 72 [2020-11-29 20:37:40,492 INFO L226 Difference]: Without dead ends: 69 [2020-11-29 20:37:40,492 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-11-29 20:37:40,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-11-29 20:37:40,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 52. [2020-11-29 20:37:40,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-11-29 20:37:40,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 56 transitions. [2020-11-29 20:37:40,499 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 56 transitions. Word has length 16 [2020-11-29 20:37:40,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:37:40,499 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 56 transitions. [2020-11-29 20:37:40,499 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-29 20:37:40,499 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 56 transitions. [2020-11-29 20:37:40,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-11-29 20:37:40,500 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:37:40,500 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] [2020-11-29 20:37:40,701 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-11-29 20:37:40,701 INFO L429 AbstractCegarLoop]: === Iteration 7 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-29 20:37:40,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:37:40,702 INFO L82 PathProgramCache]: Analyzing trace with hash 2121234189, now seen corresponding path program 1 times [2020-11-29 20:37:40,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:37:40,702 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973432580] [2020-11-29 20:37:40,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:37:40,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:37:40,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 20:37:40,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:37:40,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-11-29 20:37:40,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:37:40,778 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-29 20:37:40,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973432580] [2020-11-29 20:37:40,779 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 20:37:40,779 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-29 20:37:40,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750390884] [2020-11-29 20:37:40,780 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-29 20:37:40,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:37:40,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 20:37:40,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-29 20:37:40,781 INFO L87 Difference]: Start difference. First operand 52 states and 56 transitions. Second operand 4 states. [2020-11-29 20:37:40,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:37:40,869 INFO L93 Difference]: Finished difference Result 50 states and 54 transitions. [2020-11-29 20:37:40,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 20:37:40,869 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-11-29 20:37:40,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:37:40,870 INFO L225 Difference]: With dead ends: 50 [2020-11-29 20:37:40,871 INFO L226 Difference]: Without dead ends: 50 [2020-11-29 20:37:40,871 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-29 20:37:40,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-11-29 20:37:40,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2020-11-29 20:37:40,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-11-29 20:37:40,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2020-11-29 20:37:40,877 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 20 [2020-11-29 20:37:40,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:37:40,877 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2020-11-29 20:37:40,877 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-29 20:37:40,877 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2020-11-29 20:37:40,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-11-29 20:37:40,878 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:37:40,878 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] [2020-11-29 20:37:40,879 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-11-29 20:37:40,879 INFO L429 AbstractCegarLoop]: === Iteration 8 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-29 20:37:40,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:37:40,879 INFO L82 PathProgramCache]: Analyzing trace with hash 2121234190, now seen corresponding path program 1 times [2020-11-29 20:37:40,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:37:40,880 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528744068] [2020-11-29 20:37:40,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:37:40,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:37:40,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 20:37:40,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:37:40,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-11-29 20:37:40,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:37:40,991 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-29 20:37:40,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528744068] [2020-11-29 20:37:40,992 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 20:37:40,992 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-29 20:37:40,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487169681] [2020-11-29 20:37:40,993 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-29 20:37:40,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:37:41,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 20:37:41,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-29 20:37:41,005 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand 4 states. [2020-11-29 20:37:41,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:37:41,141 INFO L93 Difference]: Finished difference Result 54 states and 58 transitions. [2020-11-29 20:37:41,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 20:37:41,141 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-11-29 20:37:41,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:37:41,143 INFO L225 Difference]: With dead ends: 54 [2020-11-29 20:37:41,143 INFO L226 Difference]: Without dead ends: 54 [2020-11-29 20:37:41,143 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-29 20:37:41,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-11-29 20:37:41,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 52. [2020-11-29 20:37:41,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-11-29 20:37:41,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 56 transitions. [2020-11-29 20:37:41,148 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 56 transitions. Word has length 20 [2020-11-29 20:37:41,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:37:41,149 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 56 transitions. [2020-11-29 20:37:41,149 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-29 20:37:41,149 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 56 transitions. [2020-11-29 20:37:41,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-11-29 20:37:41,154 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:37:41,154 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:37:41,154 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-11-29 20:37:41,155 INFO L429 AbstractCegarLoop]: === Iteration 9 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-29 20:37:41,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:37:41,155 INFO L82 PathProgramCache]: Analyzing trace with hash 2011781567, now seen corresponding path program 1 times [2020-11-29 20:37:41,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:37:41,160 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462269832] [2020-11-29 20:37:41,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:37:41,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:37:41,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 20:37:41,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:37:41,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-11-29 20:37:41,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:37:41,239 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-29 20:37:41,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462269832] [2020-11-29 20:37:41,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631223556] [2020-11-29 20:37:41,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_68156a7c-eb4c-40bb-a179-dcd99bdae26f/bin/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:37:41,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:37:41,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 3 conjunts are in the unsatisfiable core [2020-11-29 20:37:41,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:37:41,330 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-29 20:37:41,330 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:37:41,330 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2020-11-29 20:37:41,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845963813] [2020-11-29 20:37:41,331 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-29 20:37:41,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:37:41,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-29 20:37:41,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-11-29 20:37:41,332 INFO L87 Difference]: Start difference. First operand 52 states and 56 transitions. Second operand 6 states. [2020-11-29 20:37:41,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:37:41,458 INFO L93 Difference]: Finished difference Result 76 states and 81 transitions. [2020-11-29 20:37:41,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-29 20:37:41,459 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 26 [2020-11-29 20:37:41,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:37:41,460 INFO L225 Difference]: With dead ends: 76 [2020-11-29 20:37:41,460 INFO L226 Difference]: Without dead ends: 76 [2020-11-29 20:37:41,461 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-11-29 20:37:41,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-11-29 20:37:41,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 59. [2020-11-29 20:37:41,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-11-29 20:37:41,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 65 transitions. [2020-11-29 20:37:41,467 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 65 transitions. Word has length 26 [2020-11-29 20:37:41,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:37:41,468 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 65 transitions. [2020-11-29 20:37:41,468 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-29 20:37:41,468 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 65 transitions. [2020-11-29 20:37:41,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-11-29 20:37:41,469 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:37:41,469 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:37:41,690 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:37:41,690 INFO L429 AbstractCegarLoop]: === Iteration 10 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-29 20:37:41,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:37:41,691 INFO L82 PathProgramCache]: Analyzing trace with hash 1143280978, now seen corresponding path program 1 times [2020-11-29 20:37:41,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:37:41,691 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446985177] [2020-11-29 20:37:41,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:37:41,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:37:41,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 20:37:41,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:37:41,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-11-29 20:37:41,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:37:41,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-11-29 20:37:41,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:37:41,778 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-29 20:37:41,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446985177] [2020-11-29 20:37:41,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258629418] [2020-11-29 20:37:41,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_68156a7c-eb4c-40bb-a179-dcd99bdae26f/bin/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:37:41,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:37:41,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-29 20:37:41,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:37:41,912 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-29 20:37:41,912 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-11-29 20:37:41,912 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 9 [2020-11-29 20:37:41,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983108044] [2020-11-29 20:37:41,913 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-29 20:37:41,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:37:41,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-29 20:37:41,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-11-29 20:37:41,914 INFO L87 Difference]: Start difference. First operand 59 states and 65 transitions. Second operand 6 states. [2020-11-29 20:37:42,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:37:42,084 INFO L93 Difference]: Finished difference Result 68 states and 71 transitions. [2020-11-29 20:37:42,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-29 20:37:42,085 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 31 [2020-11-29 20:37:42,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:37:42,086 INFO L225 Difference]: With dead ends: 68 [2020-11-29 20:37:42,086 INFO L226 Difference]: Without dead ends: 65 [2020-11-29 20:37:42,087 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-11-29 20:37:42,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-11-29 20:37:42,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 59. [2020-11-29 20:37:42,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-11-29 20:37:42,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 64 transitions. [2020-11-29 20:37:42,092 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 64 transitions. Word has length 31 [2020-11-29 20:37:42,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:37:42,092 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 64 transitions. [2020-11-29 20:37:42,092 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-29 20:37:42,092 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 64 transitions. [2020-11-29 20:37:42,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-11-29 20:37:42,093 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:37:42,093 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:37:42,313 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-11-29 20:37:42,313 INFO L429 AbstractCegarLoop]: === Iteration 11 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-29 20:37:42,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:37:42,314 INFO L82 PathProgramCache]: Analyzing trace with hash -1735380924, now seen corresponding path program 1 times [2020-11-29 20:37:42,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:37:42,314 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399329178] [2020-11-29 20:37:42,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:37:42,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:37:42,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 20:37:42,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:37:42,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-11-29 20:37:42,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:37:42,387 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-11-29 20:37:42,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399329178] [2020-11-29 20:37:42,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079187699] [2020-11-29 20:37:42,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_68156a7c-eb4c-40bb-a179-dcd99bdae26f/bin/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:37:42,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:37:42,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-29 20:37:42,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:37:42,466 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-11-29 20:37:42,466 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:37:42,467 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 4 [2020-11-29 20:37:42,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67874911] [2020-11-29 20:37:42,467 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-29 20:37:42,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:37:42,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-29 20:37:42,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-29 20:37:42,469 INFO L87 Difference]: Start difference. First operand 59 states and 64 transitions. Second operand 5 states. [2020-11-29 20:37:42,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:37:42,587 INFO L93 Difference]: Finished difference Result 70 states and 76 transitions. [2020-11-29 20:37:42,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-29 20:37:42,588 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 32 [2020-11-29 20:37:42,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:37:42,589 INFO L225 Difference]: With dead ends: 70 [2020-11-29 20:37:42,589 INFO L226 Difference]: Without dead ends: 70 [2020-11-29 20:37:42,590 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-11-29 20:37:42,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-11-29 20:37:42,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 63. [2020-11-29 20:37:42,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-11-29 20:37:42,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 69 transitions. [2020-11-29 20:37:42,602 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 69 transitions. Word has length 32 [2020-11-29 20:37:42,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:37:42,604 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 69 transitions. [2020-11-29 20:37:42,605 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-29 20:37:42,605 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 69 transitions. [2020-11-29 20:37:42,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-11-29 20:37:42,608 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:37:42,608 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:37:42,834 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:37:42,834 INFO L429 AbstractCegarLoop]: === Iteration 12 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-29 20:37:42,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:37:42,835 INFO L82 PathProgramCache]: Analyzing trace with hash 2037766250, now seen corresponding path program 1 times [2020-11-29 20:37:42,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:37:42,835 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382166444] [2020-11-29 20:37:42,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:37:42,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:37:42,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 20:37:42,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:37:42,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-11-29 20:37:42,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:37:42,950 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-11-29 20:37:42,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382166444] [2020-11-29 20:37:42,951 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 20:37:42,951 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-29 20:37:42,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665709150] [2020-11-29 20:37:42,955 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-29 20:37:42,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:37:42,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-29 20:37:42,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-11-29 20:37:42,963 INFO L87 Difference]: Start difference. First operand 63 states and 69 transitions. Second operand 7 states. [2020-11-29 20:37:43,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:37:43,150 INFO L93 Difference]: Finished difference Result 62 states and 68 transitions. [2020-11-29 20:37:43,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-29 20:37:43,151 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 33 [2020-11-29 20:37:43,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:37:43,152 INFO L225 Difference]: With dead ends: 62 [2020-11-29 20:37:43,152 INFO L226 Difference]: Without dead ends: 62 [2020-11-29 20:37:43,153 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2020-11-29 20:37:43,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-11-29 20:37:43,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2020-11-29 20:37:43,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-11-29 20:37:43,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 68 transitions. [2020-11-29 20:37:43,158 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 68 transitions. Word has length 33 [2020-11-29 20:37:43,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:37:43,159 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 68 transitions. [2020-11-29 20:37:43,159 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-29 20:37:43,159 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 68 transitions. [2020-11-29 20:37:43,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-11-29 20:37:43,160 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:37:43,160 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:37:43,161 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-11-29 20:37:43,161 INFO L429 AbstractCegarLoop]: === Iteration 13 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-29 20:37:43,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:37:43,161 INFO L82 PathProgramCache]: Analyzing trace with hash 1978883467, now seen corresponding path program 2 times [2020-11-29 20:37:43,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:37:43,167 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279236983] [2020-11-29 20:37:43,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:37:43,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:37:43,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 20:37:43,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:37:43,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-11-29 20:37:43,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:37:43,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-11-29 20:37:43,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:37:43,294 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 13 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-29 20:37:43,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279236983] [2020-11-29 20:37:43,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861762779] [2020-11-29 20:37:43,294 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_68156a7c-eb4c-40bb-a179-dcd99bdae26f/bin/uautomizer/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:37:43,354 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 20:37:43,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:37:43,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-29 20:37:43,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:37:43,446 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-29 20:37:43,446 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:37:43,447 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2020-11-29 20:37:43,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109315497] [2020-11-29 20:37:43,447 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-29 20:37:43,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:37:43,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-29 20:37:43,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-11-29 20:37:43,448 INFO L87 Difference]: Start difference. First operand 62 states and 68 transitions. Second operand 11 states. [2020-11-29 20:37:43,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:37:43,756 INFO L93 Difference]: Finished difference Result 72 states and 75 transitions. [2020-11-29 20:37:43,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-29 20:37:43,756 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 36 [2020-11-29 20:37:43,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:37:43,757 INFO L225 Difference]: With dead ends: 72 [2020-11-29 20:37:43,757 INFO L226 Difference]: Without dead ends: 69 [2020-11-29 20:37:43,758 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2020-11-29 20:37:43,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-11-29 20:37:43,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 62. [2020-11-29 20:37:43,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-11-29 20:37:43,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 67 transitions. [2020-11-29 20:37:43,763 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 67 transitions. Word has length 36 [2020-11-29 20:37:43,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:37:43,763 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 67 transitions. [2020-11-29 20:37:43,763 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-29 20:37:43,763 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 67 transitions. [2020-11-29 20:37:43,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-11-29 20:37:43,764 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:37:43,764 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:37:43,990 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-11-29 20:37:43,990 INFO L429 AbstractCegarLoop]: === Iteration 14 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-29 20:37:43,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:37:43,990 INFO L82 PathProgramCache]: Analyzing trace with hash -1601507541, now seen corresponding path program 2 times [2020-11-29 20:37:43,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:37:43,991 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161895238] [2020-11-29 20:37:43,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:37:44,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:37:44,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 20:37:44,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:37:44,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-11-29 20:37:44,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:37:44,118 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 19 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-29 20:37:44,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161895238] [2020-11-29 20:37:44,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4646160] [2020-11-29 20:37:44,119 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_68156a7c-eb4c-40bb-a179-dcd99bdae26f/bin/uautomizer/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:37:44,173 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 20:37:44,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:37:44,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-29 20:37:44,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:37:44,296 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 25 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-29 20:37:44,296 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:37:44,296 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2020-11-29 20:37:44,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252314240] [2020-11-29 20:37:44,297 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-29 20:37:44,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:37:44,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-29 20:37:44,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2020-11-29 20:37:44,298 INFO L87 Difference]: Start difference. First operand 62 states and 67 transitions. Second operand 13 states. [2020-11-29 20:37:44,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:37:44,644 INFO L93 Difference]: Finished difference Result 94 states and 97 transitions. [2020-11-29 20:37:44,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-29 20:37:44,645 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 37 [2020-11-29 20:37:44,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:37:44,646 INFO L225 Difference]: With dead ends: 94 [2020-11-29 20:37:44,646 INFO L226 Difference]: Without dead ends: 94 [2020-11-29 20:37:44,647 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2020-11-29 20:37:44,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-11-29 20:37:44,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 78. [2020-11-29 20:37:44,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-11-29 20:37:44,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 83 transitions. [2020-11-29 20:37:44,653 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 83 transitions. Word has length 37 [2020-11-29 20:37:44,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:37:44,654 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 83 transitions. [2020-11-29 20:37:44,654 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-11-29 20:37:44,654 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 83 transitions. [2020-11-29 20:37:44,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-11-29 20:37:44,655 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:37:44,656 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:37:44,869 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:37:44,869 INFO L429 AbstractCegarLoop]: === Iteration 15 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-29 20:37:44,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:37:44,870 INFO L82 PathProgramCache]: Analyzing trace with hash 1930842354, now seen corresponding path program 3 times [2020-11-29 20:37:44,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:37:44,870 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996573347] [2020-11-29 20:37:44,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:37:44,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:37:44,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 20:37:44,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:37:44,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-11-29 20:37:44,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:37:44,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-11-29 20:37:44,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:37:45,007 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-11-29 20:37:45,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996573347] [2020-11-29 20:37:45,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329386429] [2020-11-29 20:37:45,008 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_68156a7c-eb4c-40bb-a179-dcd99bdae26f/bin/uautomizer/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:37:45,064 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-11-29 20:37:45,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:37:45,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-29 20:37:45,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:37:45,104 INFO L441 ElimStorePlain]: Different costs {0=[|v_#length_12|], 1=[|v_#valid_24|]} [2020-11-29 20:37:45,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-29 20:37:45,123 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 [2020-11-29 20:37:45,123 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 20:37:45,136 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 20:37:45,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-29 20:37:45,144 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 [2020-11-29 20:37:45,146 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-11-29 20:37:45,156 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 20:37:45,156 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-29 20:37:45,157 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:24, output treesize:17 [2020-11-29 20:37:45,412 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-11-29 20:37:45,413 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:37:45,413 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2020-11-29 20:37:45,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773694158] [2020-11-29 20:37:45,414 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-29 20:37:45,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:37:45,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-29 20:37:45,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-11-29 20:37:45,417 INFO L87 Difference]: Start difference. First operand 78 states and 83 transitions. Second operand 9 states. [2020-11-29 20:37:45,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:37:45,611 INFO L93 Difference]: Finished difference Result 82 states and 87 transitions. [2020-11-29 20:37:45,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-29 20:37:45,611 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 41 [2020-11-29 20:37:45,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:37:45,612 INFO L225 Difference]: With dead ends: 82 [2020-11-29 20:37:45,613 INFO L226 Difference]: Without dead ends: 82 [2020-11-29 20:37:45,613 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-11-29 20:37:45,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-11-29 20:37:45,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 80. [2020-11-29 20:37:45,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-11-29 20:37:45,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 85 transitions. [2020-11-29 20:37:45,618 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 85 transitions. Word has length 41 [2020-11-29 20:37:45,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:37:45,618 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 85 transitions. [2020-11-29 20:37:45,618 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-29 20:37:45,618 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 85 transitions. [2020-11-29 20:37:45,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-11-29 20:37:45,620 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:37:45,620 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:37:45,820 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-11-29 20:37:45,820 INFO L429 AbstractCegarLoop]: === Iteration 16 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-29 20:37:45,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:37:45,821 INFO L82 PathProgramCache]: Analyzing trace with hash 492189859, now seen corresponding path program 2 times [2020-11-29 20:37:45,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:37:45,821 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951174715] [2020-11-29 20:37:45,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:37:45,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:37:45,900 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 20:37:45,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:37:45,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-11-29 20:37:45,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:37:45,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-11-29 20:37:45,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:37:45,920 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2020-11-29 20:37:45,920 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951174715] [2020-11-29 20:37:45,921 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013591071] [2020-11-29 20:37:45,921 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_68156a7c-eb4c-40bb-a179-dcd99bdae26f/bin/uautomizer/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:37:45,963 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-11-29 20:37:45,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:37:45,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-29 20:37:45,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:37:45,986 INFO L441 ElimStorePlain]: Different costs {0=[|v_#length_13|], 1=[|v_#valid_25|]} [2020-11-29 20:37:45,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-29 20:37:45,993 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 [2020-11-29 20:37:45,994 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 20:37:46,005 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 20:37:46,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-29 20:37:46,012 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 [2020-11-29 20:37:46,014 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-11-29 20:37:46,022 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 20:37:46,023 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. [2020-11-29 20:37:46,024 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:21, output treesize:14 [2020-11-29 20:37:46,252 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2020-11-29 20:37:46,253 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-11-29 20:37:46,254 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 8 [2020-11-29 20:37:46,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59438134] [2020-11-29 20:37:46,256 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-29 20:37:46,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:37:46,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-29 20:37:46,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-11-29 20:37:46,257 INFO L87 Difference]: Start difference. First operand 80 states and 85 transitions. Second operand 5 states. [2020-11-29 20:37:46,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:37:46,332 INFO L93 Difference]: Finished difference Result 81 states and 85 transitions. [2020-11-29 20:37:46,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-29 20:37:46,333 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 47 [2020-11-29 20:37:46,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:37:46,334 INFO L225 Difference]: With dead ends: 81 [2020-11-29 20:37:46,334 INFO L226 Difference]: Without dead ends: 81 [2020-11-29 20:37:46,334 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 46 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-11-29 20:37:46,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-11-29 20:37:46,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 80. [2020-11-29 20:37:46,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-11-29 20:37:46,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 84 transitions. [2020-11-29 20:37:46,338 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 84 transitions. Word has length 47 [2020-11-29 20:37:46,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:37:46,339 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 84 transitions. [2020-11-29 20:37:46,339 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-29 20:37:46,339 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 84 transitions. [2020-11-29 20:37:46,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-11-29 20:37:46,340 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:37:46,340 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:37:46,566 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-11-29 20:37:46,566 INFO L429 AbstractCegarLoop]: === Iteration 17 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-29 20:37:46,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:37:46,567 INFO L82 PathProgramCache]: Analyzing trace with hash -190258011, now seen corresponding path program 1 times [2020-11-29 20:37:46,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:37:46,567 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774701647] [2020-11-29 20:37:46,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:37:46,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:37:46,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 20:37:46,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:37:46,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-11-29 20:37:46,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:37:46,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-11-29 20:37:46,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:37:46,636 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-11-29 20:37:46,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774701647] [2020-11-29 20:37:46,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283952498] [2020-11-29 20:37:46,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_68156a7c-eb4c-40bb-a179-dcd99bdae26f/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 [2020-11-29 20:37:46,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:37:46,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-29 20:37:46,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:37:46,723 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-11-29 20:37:46,723 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:37:46,724 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2020-11-29 20:37:46,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492493526] [2020-11-29 20:37:46,724 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-29 20:37:46,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:37:46,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-29 20:37:46,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-11-29 20:37:46,725 INFO L87 Difference]: Start difference. First operand 80 states and 84 transitions. Second operand 7 states. [2020-11-29 20:37:46,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:37:46,847 INFO L93 Difference]: Finished difference Result 107 states and 111 transitions. [2020-11-29 20:37:46,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-29 20:37:46,847 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 50 [2020-11-29 20:37:46,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:37:46,848 INFO L225 Difference]: With dead ends: 107 [2020-11-29 20:37:46,848 INFO L226 Difference]: Without dead ends: 107 [2020-11-29 20:37:46,849 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-11-29 20:37:46,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-11-29 20:37:46,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 87. [2020-11-29 20:37:46,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-11-29 20:37:46,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 93 transitions. [2020-11-29 20:37:46,853 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 93 transitions. Word has length 50 [2020-11-29 20:37:46,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:37:46,854 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 93 transitions. [2020-11-29 20:37:46,854 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-29 20:37:46,854 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 93 transitions. [2020-11-29 20:37:46,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-29 20:37:46,855 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:37:46,855 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:37:47,070 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-11-29 20:37:47,070 INFO L429 AbstractCegarLoop]: === Iteration 18 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-29 20:37:47,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:37:47,071 INFO L82 PathProgramCache]: Analyzing trace with hash -2025940537, now seen corresponding path program 3 times [2020-11-29 20:37:47,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:37:47,071 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046670444] [2020-11-29 20:37:47,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:37:47,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:37:47,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 20:37:47,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:37:47,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-11-29 20:37:47,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:37:47,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-11-29 20:37:47,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:37:47,183 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 42 proven. 9 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2020-11-29 20:37:47,184 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046670444] [2020-11-29 20:37:47,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159208217] [2020-11-29 20:37:47,186 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_68156a7c-eb4c-40bb-a179-dcd99bdae26f/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 [2020-11-29 20:37:47,248 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-11-29 20:37:47,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:37:47,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-29 20:37:47,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:37:47,348 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 51 proven. 2 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-11-29 20:37:47,349 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:37:47,349 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 11 [2020-11-29 20:37:47,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149625577] [2020-11-29 20:37:47,350 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-29 20:37:47,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:37:47,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-29 20:37:47,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-11-29 20:37:47,356 INFO L87 Difference]: Start difference. First operand 87 states and 93 transitions. Second operand 12 states. [2020-11-29 20:37:47,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:37:47,730 INFO L93 Difference]: Finished difference Result 103 states and 110 transitions. [2020-11-29 20:37:47,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-29 20:37:47,731 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 58 [2020-11-29 20:37:47,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:37:47,732 INFO L225 Difference]: With dead ends: 103 [2020-11-29 20:37:47,732 INFO L226 Difference]: Without dead ends: 103 [2020-11-29 20:37:47,733 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2020-11-29 20:37:47,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-11-29 20:37:47,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 85. [2020-11-29 20:37:47,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-11-29 20:37:47,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 91 transitions. [2020-11-29 20:37:47,737 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 91 transitions. Word has length 58 [2020-11-29 20:37:47,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:37:47,738 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 91 transitions. [2020-11-29 20:37:47,738 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-29 20:37:47,738 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 91 transitions. [2020-11-29 20:37:47,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-11-29 20:37:47,739 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:37:47,739 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:37:47,940 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-11-29 20:37:47,940 INFO L429 AbstractCegarLoop]: === Iteration 19 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-29 20:37:47,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:37:47,940 INFO L82 PathProgramCache]: Analyzing trace with hash 746278286, now seen corresponding path program 4 times [2020-11-29 20:37:47,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:37:47,941 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410559857] [2020-11-29 20:37:47,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:37:47,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:37:47,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 20:37:47,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:37:47,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-11-29 20:37:47,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:37:48,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-11-29 20:37:48,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:37:48,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-11-29 20:37:48,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:37:48,108 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 51 proven. 15 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-11-29 20:37:48,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410559857] [2020-11-29 20:37:48,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625319206] [2020-11-29 20:37:48,109 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_68156a7c-eb4c-40bb-a179-dcd99bdae26f/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 [2020-11-29 20:37:48,165 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-29 20:37:48,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:37:48,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-29 20:37:48,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:37:48,351 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 42 proven. 42 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-11-29 20:37:48,351 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:37:48,351 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2020-11-29 20:37:48,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331922473] [2020-11-29 20:37:48,352 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-29 20:37:48,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:37:48,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-29 20:37:48,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2020-11-29 20:37:48,353 INFO L87 Difference]: Start difference. First operand 85 states and 91 transitions. Second operand 16 states. [2020-11-29 20:37:49,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:37:49,075 INFO L93 Difference]: Finished difference Result 104 states and 107 transitions. [2020-11-29 20:37:49,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-29 20:37:49,075 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 62 [2020-11-29 20:37:49,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:37:49,076 INFO L225 Difference]: With dead ends: 104 [2020-11-29 20:37:49,076 INFO L226 Difference]: Without dead ends: 101 [2020-11-29 20:37:49,077 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=145, Invalid=455, Unknown=0, NotChecked=0, Total=600 [2020-11-29 20:37:49,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-11-29 20:37:49,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 90. [2020-11-29 20:37:49,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-11-29 20:37:49,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 96 transitions. [2020-11-29 20:37:49,081 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 96 transitions. Word has length 62 [2020-11-29 20:37:49,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:37:49,081 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 96 transitions. [2020-11-29 20:37:49,081 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-11-29 20:37:49,082 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 96 transitions. [2020-11-29 20:37:49,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-11-29 20:37:49,083 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:37:49,083 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:37:49,306 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:37:49,306 INFO L429 AbstractCegarLoop]: === Iteration 20 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-29 20:37:49,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:37:49,306 INFO L82 PathProgramCache]: Analyzing trace with hash 1227025103, now seen corresponding path program 5 times [2020-11-29 20:37:49,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:37:49,307 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868885790] [2020-11-29 20:37:49,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:37:49,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:37:49,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 20:37:49,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:37:49,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-11-29 20:37:49,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:37:49,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-11-29 20:37:49,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:37:49,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-11-29 20:37:49,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:37:49,483 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2020-11-29 20:37:49,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868885790] [2020-11-29 20:37:49,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492687655] [2020-11-29 20:37:49,483 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_68156a7c-eb4c-40bb-a179-dcd99bdae26f/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 [2020-11-29 20:37:49,564 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-11-29 20:37:49,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:37:49,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-29 20:37:49,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:37:49,586 INFO L441 ElimStorePlain]: Different costs {0=[|v_#length_14|], 1=[|v_#valid_26|]} [2020-11-29 20:37:49,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-29 20:37:49,603 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 [2020-11-29 20:37:49,603 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 20:37:49,612 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 20:37:49,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-29 20:37:49,616 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 [2020-11-29 20:37:49,618 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-11-29 20:37:49,628 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 20:37:49,629 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. [2020-11-29 20:37:49,629 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:24, output treesize:17 [2020-11-29 20:37:49,914 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2020-11-29 20:37:49,914 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:37:49,914 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-11-29 20:37:49,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614637197] [2020-11-29 20:37:49,915 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-29 20:37:49,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:37:49,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-29 20:37:49,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-11-29 20:37:49,917 INFO L87 Difference]: Start difference. First operand 90 states and 96 transitions. Second operand 10 states. [2020-11-29 20:37:50,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:37:50,130 INFO L93 Difference]: Finished difference Result 95 states and 102 transitions. [2020-11-29 20:37:50,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-29 20:37:50,130 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 67 [2020-11-29 20:37:50,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:37:50,131 INFO L225 Difference]: With dead ends: 95 [2020-11-29 20:37:50,132 INFO L226 Difference]: Without dead ends: 95 [2020-11-29 20:37:50,132 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 66 SyntacticMatches, 5 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-11-29 20:37:50,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-11-29 20:37:50,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 93. [2020-11-29 20:37:50,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-11-29 20:37:50,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 100 transitions. [2020-11-29 20:37:50,136 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 100 transitions. Word has length 67 [2020-11-29 20:37:50,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:37:50,136 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 100 transitions. [2020-11-29 20:37:50,136 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-29 20:37:50,136 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 100 transitions. [2020-11-29 20:37:50,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-11-29 20:37:50,137 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:37:50,137 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:37:50,350 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:37:50,350 INFO L429 AbstractCegarLoop]: === Iteration 21 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-29 20:37:50,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:37:50,350 INFO L82 PathProgramCache]: Analyzing trace with hash -199290008, now seen corresponding path program 2 times [2020-11-29 20:37:50,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:37:50,351 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616200690] [2020-11-29 20:37:50,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:37:50,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:37:50,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 20:37:50,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:37:50,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-11-29 20:37:50,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:37:50,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-11-29 20:37:50,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:37:50,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-11-29 20:37:50,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:37:50,445 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2020-11-29 20:37:50,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616200690] [2020-11-29 20:37:50,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615748856] [2020-11-29 20:37:50,446 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_68156a7c-eb4c-40bb-a179-dcd99bdae26f/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 [2020-11-29 20:37:50,495 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-11-29 20:37:50,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:37:50,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-29 20:37:50,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:37:50,599 INFO L350 Elim1Store]: treesize reduction 14, result has 50.0 percent of original size [2020-11-29 20:37:50,600 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 [2020-11-29 20:37:50,602 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 20:37:50,609 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 20:37:50,611 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. [2020-11-29 20:37:50,612 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:23, output treesize:15 [2020-11-29 20:37:50,748 INFO L350 Elim1Store]: treesize reduction 14, result has 50.0 percent of original size [2020-11-29 20:37:50,749 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 [2020-11-29 20:37:50,750 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 20:37:50,757 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 20:37:50,759 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. [2020-11-29 20:37:50,759 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:23, output treesize:15 [2020-11-29 20:37:50,889 INFO L350 Elim1Store]: treesize reduction 14, result has 50.0 percent of original size [2020-11-29 20:37:50,890 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 [2020-11-29 20:37:50,891 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 20:37:50,900 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 20:37:50,901 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. [2020-11-29 20:37:50,902 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:23, output treesize:15 [2020-11-29 20:37:51,060 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2020-11-29 20:37:51,061 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-11-29 20:37:51,061 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 11 [2020-11-29 20:37:51,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63380592] [2020-11-29 20:37:51,062 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-29 20:37:51,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:37:51,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-29 20:37:51,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-11-29 20:37:51,063 INFO L87 Difference]: Start difference. First operand 93 states and 100 transitions. Second operand 6 states. [2020-11-29 20:37:51,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:37:51,157 INFO L93 Difference]: Finished difference Result 92 states and 99 transitions. [2020-11-29 20:37:51,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-29 20:37:51,157 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 76 [2020-11-29 20:37:51,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:37:51,158 INFO L225 Difference]: With dead ends: 92 [2020-11-29 20:37:51,159 INFO L226 Difference]: Without dead ends: 89 [2020-11-29 20:37:51,159 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 75 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-11-29 20:37:51,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-11-29 20:37:51,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 82. [2020-11-29 20:37:51,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-11-29 20:37:51,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 85 transitions. [2020-11-29 20:37:51,163 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 85 transitions. Word has length 76 [2020-11-29 20:37:51,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:37:51,163 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 85 transitions. [2020-11-29 20:37:51,163 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-29 20:37:51,163 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 85 transitions. [2020-11-29 20:37:51,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-11-29 20:37:51,164 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:37:51,164 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:37:51,378 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-11-29 20:37:51,378 INFO L429 AbstractCegarLoop]: === Iteration 22 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-29 20:37:51,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:37:51,379 INFO L82 PathProgramCache]: Analyzing trace with hash -1882931165, now seen corresponding path program 1 times [2020-11-29 20:37:51,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:37:51,379 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637619724] [2020-11-29 20:37:51,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:37:51,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:37:51,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 20:37:51,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:37:51,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-11-29 20:37:51,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:37:51,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-11-29 20:37:51,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:37:51,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-11-29 20:37:51,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:37:51,517 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2020-11-29 20:37:51,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637619724] [2020-11-29 20:37:51,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566895233] [2020-11-29 20:37:51,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_68156a7c-eb4c-40bb-a179-dcd99bdae26f/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 [2020-11-29 20:37:51,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:37:51,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-29 20:37:51,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:37:51,611 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2020-11-29 20:37:51,611 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:37:51,612 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2020-11-29 20:37:51,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960340722] [2020-11-29 20:37:51,613 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-29 20:37:51,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:37:51,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-29 20:37:51,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-11-29 20:37:51,614 INFO L87 Difference]: Start difference. First operand 82 states and 85 transitions. Second operand 8 states. [2020-11-29 20:37:51,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:37:51,770 INFO L93 Difference]: Finished difference Result 108 states and 112 transitions. [2020-11-29 20:37:51,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-29 20:37:51,774 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 77 [2020-11-29 20:37:51,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:37:51,775 INFO L225 Difference]: With dead ends: 108 [2020-11-29 20:37:51,775 INFO L226 Difference]: Without dead ends: 108 [2020-11-29 20:37:51,775 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-11-29 20:37:51,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-11-29 20:37:51,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 85. [2020-11-29 20:37:51,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-11-29 20:37:51,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 88 transitions. [2020-11-29 20:37:51,779 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 88 transitions. Word has length 77 [2020-11-29 20:37:51,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:37:51,780 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 88 transitions. [2020-11-29 20:37:51,780 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-29 20:37:51,780 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 88 transitions. [2020-11-29 20:37:51,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-11-29 20:37:51,781 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:37:51,781 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:37:51,998 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:37:51,998 INFO L429 AbstractCegarLoop]: === Iteration 23 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-29 20:37:51,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:37:51,999 INFO L82 PathProgramCache]: Analyzing trace with hash 1445837420, now seen corresponding path program 6 times [2020-11-29 20:37:51,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:37:51,999 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539781907] [2020-11-29 20:37:51,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:37:52,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:37:52,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 20:37:52,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:37:52,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-11-29 20:37:52,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:37:52,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-11-29 20:37:52,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:37:52,113 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-11-29 20:37:52,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:37:52,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-11-29 20:37:52,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:37:52,215 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 133 proven. 32 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2020-11-29 20:37:52,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539781907] [2020-11-29 20:37:52,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058951381] [2020-11-29 20:37:52,216 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_68156a7c-eb4c-40bb-a179-dcd99bdae26f/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 [2020-11-29 20:37:52,261 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-11-29 20:37:52,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:37:52,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-29 20:37:52,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:37:52,276 INFO L441 ElimStorePlain]: Different costs {0=[|v_#length_15|], 1=[|v_#valid_29|]} [2020-11-29 20:37:52,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-29 20:37:52,281 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 [2020-11-29 20:37:52,281 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 20:37:52,291 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 20:37:52,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-29 20:37:52,296 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 [2020-11-29 20:37:52,298 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-11-29 20:37:52,305 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 20:37:52,306 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. [2020-11-29 20:37:52,306 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:21, output treesize:14 [2020-11-29 20:37:52,927 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 83 proven. 67 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-11-29 20:37:52,928 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:37:52,928 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 20 [2020-11-29 20:37:52,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356498465] [2020-11-29 20:37:52,929 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-29 20:37:52,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:37:52,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-29 20:37:52,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2020-11-29 20:37:52,930 INFO L87 Difference]: Start difference. First operand 85 states and 88 transitions. Second operand 20 states. [2020-11-29 20:37:54,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:37:54,151 INFO L93 Difference]: Finished difference Result 106 states and 110 transitions. [2020-11-29 20:37:54,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-11-29 20:37:54,152 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 93 [2020-11-29 20:37:54,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:37:54,153 INFO L225 Difference]: With dead ends: 106 [2020-11-29 20:37:54,153 INFO L226 Difference]: Without dead ends: 96 [2020-11-29 20:37:54,154 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 88 SyntacticMatches, 6 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=206, Invalid=916, Unknown=0, NotChecked=0, Total=1122 [2020-11-29 20:37:54,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-11-29 20:37:54,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 92. [2020-11-29 20:37:54,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-11-29 20:37:54,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 95 transitions. [2020-11-29 20:37:54,158 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 95 transitions. Word has length 93 [2020-11-29 20:37:54,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:37:54,159 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 95 transitions. [2020-11-29 20:37:54,159 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-11-29 20:37:54,159 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 95 transitions. [2020-11-29 20:37:54,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-11-29 20:37:54,160 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:37:54,160 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:37:54,361 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-11-29 20:37:54,361 INFO L429 AbstractCegarLoop]: === Iteration 24 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-29 20:37:54,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:37:54,361 INFO L82 PathProgramCache]: Analyzing trace with hash -1309983867, now seen corresponding path program 2 times [2020-11-29 20:37:54,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:37:54,361 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512846907] [2020-11-29 20:37:54,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:37:54,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:37:54,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 20:37:54,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:37:54,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-11-29 20:37:54,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:37:54,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-11-29 20:37:54,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:37:54,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-11-29 20:37:54,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:37:54,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-11-29 20:37:54,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:37:54,505 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2020-11-29 20:37:54,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512846907] [2020-11-29 20:37:54,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604400915] [2020-11-29 20:37:54,506 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_68156a7c-eb4c-40bb-a179-dcd99bdae26f/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 [2020-11-29 20:37:54,590 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 20:37:54,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:37:54,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-29 20:37:54,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:37:54,638 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2020-11-29 20:37:54,638 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:37:54,639 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2020-11-29 20:37:54,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928094921] [2020-11-29 20:37:54,641 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-29 20:37:54,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:37:54,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-29 20:37:54,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-11-29 20:37:54,642 INFO L87 Difference]: Start difference. First operand 92 states and 95 transitions. Second operand 9 states. [2020-11-29 20:37:54,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:37:54,762 INFO L93 Difference]: Finished difference Result 103 states and 108 transitions. [2020-11-29 20:37:54,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-29 20:37:54,763 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 108 [2020-11-29 20:37:54,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:37:54,764 INFO L225 Difference]: With dead ends: 103 [2020-11-29 20:37:54,764 INFO L226 Difference]: Without dead ends: 103 [2020-11-29 20:37:54,764 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-11-29 20:37:54,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-11-29 20:37:54,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 98. [2020-11-29 20:37:54,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-11-29 20:37:54,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 102 transitions. [2020-11-29 20:37:54,772 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 102 transitions. Word has length 108 [2020-11-29 20:37:54,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:37:54,772 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 102 transitions. [2020-11-29 20:37:54,773 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-29 20:37:54,773 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 102 transitions. [2020-11-29 20:37:54,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-11-29 20:37:54,778 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:37:54,778 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:37:54,994 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:37:54,994 INFO L429 AbstractCegarLoop]: === Iteration 25 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-29 20:37:54,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:37:54,994 INFO L82 PathProgramCache]: Analyzing trace with hash 472765411, now seen corresponding path program 3 times [2020-11-29 20:37:54,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:37:54,995 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346872685] [2020-11-29 20:37:54,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:37:55,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:37:55,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 20:37:55,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:37:55,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-11-29 20:37:55,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:37:55,097 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-11-29 20:37:55,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:37:55,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-11-29 20:37:55,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:37:55,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-11-29 20:37:55,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:37:55,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-11-29 20:37:55,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:37:55,146 INFO L134 CoverageAnalysis]: Checked inductivity of 642 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 577 trivial. 0 not checked. [2020-11-29 20:37:55,146 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346872685] [2020-11-29 20:37:55,146 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707182548] [2020-11-29 20:37:55,147 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_68156a7c-eb4c-40bb-a179-dcd99bdae26f/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 [2020-11-29 20:37:55,206 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-11-29 20:37:55,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:37:55,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-29 20:37:55,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:37:55,214 INFO L441 ElimStorePlain]: Different costs {0=[|v_#length_16|], 1=[|v_#valid_30|]} [2020-11-29 20:37:55,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-29 20:37:55,222 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 [2020-11-29 20:37:55,222 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 20:37:55,230 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 20:37:55,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-29 20:37:55,250 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 [2020-11-29 20:37:55,251 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-11-29 20:37:55,256 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 20:37:55,257 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. [2020-11-29 20:37:55,257 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:21, output treesize:14 [2020-11-29 20:37:55,709 INFO L134 CoverageAnalysis]: Checked inductivity of 642 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 640 trivial. 0 not checked. [2020-11-29 20:37:55,710 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-11-29 20:37:55,710 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 14 [2020-11-29 20:37:55,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736312717] [2020-11-29 20:37:55,711 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-29 20:37:55,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:37:55,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-29 20:37:55,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2020-11-29 20:37:55,712 INFO L87 Difference]: Start difference. First operand 98 states and 102 transitions. Second operand 7 states. [2020-11-29 20:37:55,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:37:55,772 INFO L93 Difference]: Finished difference Result 97 states and 101 transitions. [2020-11-29 20:37:55,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-29 20:37:55,773 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 139 [2020-11-29 20:37:55,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:37:55,773 INFO L225 Difference]: With dead ends: 97 [2020-11-29 20:37:55,773 INFO L226 Difference]: Without dead ends: 0 [2020-11-29 20:37:55,774 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 137 SyntacticMatches, 9 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2020-11-29 20:37:55,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-29 20:37:55,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-29 20:37:55,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-29 20:37:55,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-29 20:37:55,774 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 139 [2020-11-29 20:37:55,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:37:55,775 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-29 20:37:55,775 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-29 20:37:55,775 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-29 20:37:55,775 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-29 20:37:55,975 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-11-29 20:37:55,979 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.11 08:37:55 BoogieIcfgContainer [2020-11-29 20:37:55,979 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-29 20:37:55,979 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-29 20:37:55,979 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-29 20:37:55,980 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-29 20:37:55,980 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 08:37:37" (3/4) ... [2020-11-29 20:37:55,982 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-29 20:37:55,988 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2020-11-29 20:37:55,989 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure foo [2020-11-29 20:37:55,989 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2020-11-29 20:37:55,994 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 16 nodes and edges [2020-11-29 20:37:55,994 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 10 nodes and edges [2020-11-29 20:37:55,995 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2020-11-29 20:37:55,995 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-29 20:37:56,028 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_68156a7c-eb4c-40bb-a179-dcd99bdae26f/bin/uautomizer/witness.graphml [2020-11-29 20:37:56,028 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-29 20:37:56,029 INFO L168 Benchmark]: Toolchain (without parser) took 19190.84 ms. Allocated memory was 123.7 MB in the beginning and 262.1 MB in the end (delta: 138.4 MB). Free memory was 92.6 MB in the beginning and 154.0 MB in the end (delta: -61.4 MB). Peak memory consumption was 77.3 MB. Max. memory is 16.1 GB. [2020-11-29 20:37:56,030 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 77.6 MB. Free memory was 38.3 MB in the beginning and 38.3 MB in the end (delta: 33.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 20:37:56,030 INFO L168 Benchmark]: CACSL2BoogieTranslator took 255.87 ms. Allocated memory is still 123.7 MB. Free memory was 92.3 MB in the beginning and 100.4 MB in the end (delta: -8.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-29 20:37:56,031 INFO L168 Benchmark]: Boogie Preprocessor took 36.87 ms. Allocated memory is still 123.7 MB. Free memory was 100.4 MB in the beginning and 99.0 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 20:37:56,031 INFO L168 Benchmark]: RCFGBuilder took 657.93 ms. Allocated memory is still 123.7 MB. Free memory was 99.0 MB in the beginning and 83.8 MB in the end (delta: 15.3 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. [2020-11-29 20:37:56,032 INFO L168 Benchmark]: TraceAbstraction took 18184.48 ms. Allocated memory was 123.7 MB in the beginning and 262.1 MB in the end (delta: 138.4 MB). Free memory was 83.1 MB in the beginning and 155.9 MB in the end (delta: -72.8 MB). Peak memory consumption was 67.4 MB. Max. memory is 16.1 GB. [2020-11-29 20:37:56,032 INFO L168 Benchmark]: Witness Printer took 49.07 ms. Allocated memory is still 262.1 MB. Free memory was 155.9 MB in the beginning and 154.0 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 20:37:56,034 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 77.6 MB. Free memory was 38.3 MB in the beginning and 38.3 MB in the end (delta: 33.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 255.87 ms. Allocated memory is still 123.7 MB. Free memory was 92.3 MB in the beginning and 100.4 MB in the end (delta: -8.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 36.87 ms. Allocated memory is still 123.7 MB. Free memory was 100.4 MB in the beginning and 99.0 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 657.93 ms. Allocated memory is still 123.7 MB. Free memory was 99.0 MB in the beginning and 83.8 MB in the end (delta: 15.3 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. * TraceAbstraction took 18184.48 ms. Allocated memory was 123.7 MB in the beginning and 262.1 MB in the end (delta: 138.4 MB). Free memory was 83.1 MB in the beginning and 155.9 MB in the end (delta: -72.8 MB). Peak memory consumption was 67.4 MB. Max. memory is 16.1 GB. * Witness Printer took 49.07 ms. Allocated memory is still 262.1 MB. Free memory was 155.9 MB in the beginning and 154.0 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: 18]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 18]: array index is always in bounds For all program executions holds that array index is always in bounds at this location - PositiveResult [Line: 18]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 30]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 30]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 23]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 27]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 27]: 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: 18.1s, OverallIterations: 25, TraceHistogramMax: 14, AutomataDifference: 6.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 601 SDtfs, 1341 SDslu, 1101 SDs, 0 SdLazy, 3273 SolverSat, 281 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1304 GetRequests, 1040 SyntacticMatches, 34 SemanticMatches, 230 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 604 ImplicationChecksByTransitivity, 4.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=98occurred 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, 209 StatesRemovedByMinimization, 21 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 6.1s InterpolantComputationTime, 2125 NumberOfCodeBlocks, 1811 NumberOfCodeBlocksAsserted, 53 NumberOfCheckSat, 2083 ConstructedInterpolants, 395 QuantifiedInterpolants, 800524 SizeOfPredicates, 33 NumberOfNonLiveVariables, 2311 ConjunctsInSsa, 130 ConjunctsInUnsatCore, 42 InterpolantComputations, 13 PerfectInterpolantSequences, 3552/4007 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...