./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version f470102c Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_2f91cb08-60bb-48bc-b428-c44edb1aa750/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_2f91cb08-60bb-48bc-b428-c44edb1aa750/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_2f91cb08-60bb-48bc-b428-c44edb1aa750/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_2f91cb08-60bb-48bc-b428-c44edb1aa750/bin/uautomizer/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength.c -s /tmp/vcloud-vcloud-master/worker/run_dir_2f91cb08-60bb-48bc-b428-c44edb1aa750/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_2f91cb08-60bb-48bc-b428-c44edb1aa750/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 a4e278d158dd9e8a83bb0a2afcbaa26c6819a0f8 .......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.25-f470102 [2019-12-07 10:07:28,834 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-07 10:07:28,835 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-07 10:07:28,844 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-07 10:07:28,844 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-07 10:07:28,845 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-07 10:07:28,847 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-07 10:07:28,848 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-07 10:07:28,850 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-07 10:07:28,851 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-07 10:07:28,852 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-07 10:07:28,852 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-07 10:07:28,853 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-07 10:07:28,853 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-07 10:07:28,854 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-07 10:07:28,855 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-07 10:07:28,856 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-07 10:07:28,857 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-07 10:07:28,858 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-07 10:07:28,859 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-07 10:07:28,861 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-07 10:07:28,862 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-07 10:07:28,863 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-07 10:07:28,863 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-07 10:07:28,865 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-12-07 10:07:28,865 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-12-07 10:07:28,865 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-12-07 10:07:28,866 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-12-07 10:07:28,866 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-12-07 10:07:28,867 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-12-07 10:07:28,867 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-07 10:07:28,868 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-07 10:07:28,868 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-07 10:07:28,869 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-07 10:07:28,870 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-07 10:07:28,870 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-07 10:07:28,870 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-07 10:07:28,870 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-07 10:07:28,871 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-07 10:07:28,871 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-07 10:07:28,872 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-07 10:07:28,872 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_2f91cb08-60bb-48bc-b428-c44edb1aa750/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2019-12-07 10:07:28,884 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-07 10:07:28,884 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-07 10:07:28,885 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-12-07 10:07:28,885 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-12-07 10:07:28,886 INFO L138 SettingsManager]: * Use SBE=true [2019-12-07 10:07:28,886 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-07 10:07:28,886 INFO L138 SettingsManager]: * sizeof long=4 [2019-12-07 10:07:28,886 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-12-07 10:07:28,886 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-12-07 10:07:28,886 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-12-07 10:07:28,887 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-07 10:07:28,887 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2019-12-07 10:07:28,887 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2019-12-07 10:07:28,887 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2019-12-07 10:07:28,887 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-12-07 10:07:28,887 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-12-07 10:07:28,888 INFO L138 SettingsManager]: * sizeof long double=12 [2019-12-07 10:07:28,888 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-07 10:07:28,888 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-07 10:07:28,888 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-12-07 10:07:28,888 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-12-07 10:07:28,888 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-12-07 10:07:28,888 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-07 10:07:28,889 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-07 10:07:28,889 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-12-07 10:07:28,889 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-12-07 10:07:28,889 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-12-07 10:07:28,889 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-12-07 10:07:28,890 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_2f91cb08-60bb-48bc-b428-c44edb1aa750/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 -> a4e278d158dd9e8a83bb0a2afcbaa26c6819a0f8 [2019-12-07 10:07:28,995 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-07 10:07:29,006 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-07 10:07:29,009 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-07 10:07:29,010 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-07 10:07:29,010 INFO L275 PluginConnector]: CDTParser initialized [2019-12-07 10:07:29,011 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_2f91cb08-60bb-48bc-b428-c44edb1aa750/bin/uautomizer/../../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength.c [2019-12-07 10:07:29,053 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_2f91cb08-60bb-48bc-b428-c44edb1aa750/bin/uautomizer/data/d8918c544/4ecb026115e848d081b21731c5495cac/FLAG70bbdf105 [2019-12-07 10:07:29,374 INFO L306 CDTParser]: Found 1 translation units. [2019-12-07 10:07:29,374 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_2f91cb08-60bb-48bc-b428-c44edb1aa750/sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength.c [2019-12-07 10:07:29,378 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_2f91cb08-60bb-48bc-b428-c44edb1aa750/bin/uautomizer/data/d8918c544/4ecb026115e848d081b21731c5495cac/FLAG70bbdf105 [2019-12-07 10:07:29,387 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_2f91cb08-60bb-48bc-b428-c44edb1aa750/bin/uautomizer/data/d8918c544/4ecb026115e848d081b21731c5495cac [2019-12-07 10:07:29,389 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-07 10:07:29,390 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-12-07 10:07:29,391 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-07 10:07:29,391 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-07 10:07:29,393 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-07 10:07:29,393 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 10:07:29" (1/1) ... [2019-12-07 10:07:29,395 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4562956c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 10:07:29, skipping insertion in model container [2019-12-07 10:07:29,395 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 10:07:29" (1/1) ... [2019-12-07 10:07:29,400 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-07 10:07:29,410 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-07 10:07:29,510 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 10:07:29,547 INFO L203 MainTranslator]: Completed pre-run [2019-12-07 10:07:29,559 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 10:07:29,569 INFO L208 MainTranslator]: Completed translation [2019-12-07 10:07:29,569 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 10:07:29 WrapperNode [2019-12-07 10:07:29,569 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-07 10:07:29,569 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-07 10:07:29,570 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-07 10:07:29,570 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-07 10:07:29,578 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 10:07:29" (1/1) ... [2019-12-07 10:07:29,578 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 10:07:29" (1/1) ... [2019-12-07 10:07:29,583 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 10:07:29" (1/1) ... [2019-12-07 10:07:29,583 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 10:07:29" (1/1) ... [2019-12-07 10:07:29,587 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 10:07:29" (1/1) ... [2019-12-07 10:07:29,590 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 10:07:29" (1/1) ... [2019-12-07 10:07:29,591 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 10:07:29" (1/1) ... [2019-12-07 10:07:29,592 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-07 10:07:29,592 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-07 10:07:29,592 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-07 10:07:29,592 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-07 10:07:29,593 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 10:07:29" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2f91cb08-60bb-48bc-b428-c44edb1aa750/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 [2019-12-07 10:07:29,631 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-12-07 10:07:29,631 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-07 10:07:29,631 INFO L138 BoogieDeclarations]: Found implementation of procedure foo [2019-12-07 10:07:29,631 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-12-07 10:07:29,631 INFO L130 BoogieDeclarations]: Found specification of procedure foo [2019-12-07 10:07:29,631 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-12-07 10:07:29,632 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-12-07 10:07:29,632 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-12-07 10:07:29,632 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-12-07 10:07:29,632 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-12-07 10:07:29,632 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-12-07 10:07:29,632 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-07 10:07:29,777 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-07 10:07:29,777 INFO L287 CfgBuilder]: Removed 3 assume(true) statements. [2019-12-07 10:07:29,778 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 10:07:29 BoogieIcfgContainer [2019-12-07 10:07:29,778 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-07 10:07:29,779 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-12-07 10:07:29,779 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-12-07 10:07:29,781 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-12-07 10:07:29,781 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 10:07:29" (1/3) ... [2019-12-07 10:07:29,781 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1673b003 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 10:07:29, skipping insertion in model container [2019-12-07 10:07:29,782 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 10:07:29" (2/3) ... [2019-12-07 10:07:29,782 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1673b003 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 10:07:29, skipping insertion in model container [2019-12-07 10:07:29,782 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 10:07:29" (3/3) ... [2019-12-07 10:07:29,783 INFO L109 eAbstractionObserver]: Analyzing ICFG ArraysOfVariableLength.c [2019-12-07 10:07:29,789 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-12-07 10:07:29,793 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 8 error locations. [2019-12-07 10:07:29,801 INFO L249 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2019-12-07 10:07:29,813 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-12-07 10:07:29,813 INFO L374 AbstractCegarLoop]: Hoare is false [2019-12-07 10:07:29,813 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-12-07 10:07:29,813 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-12-07 10:07:29,813 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-07 10:07:29,813 INFO L378 AbstractCegarLoop]: Difference is false [2019-12-07 10:07:29,813 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-07 10:07:29,813 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-12-07 10:07:29,824 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states. [2019-12-07 10:07:29,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-07 10:07:29,832 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 10:07:29,832 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 10:07:29,833 INFO L410 AbstractCegarLoop]: === Iteration 1 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-12-07 10:07:29,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 10:07:29,836 INFO L82 PathProgramCache]: Analyzing trace with hash 1909189377, now seen corresponding path program 1 times [2019-12-07 10:07:29,842 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 10:07:29,842 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537871687] [2019-12-07 10:07:29,842 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 10:07:29,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:07:29,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:07:29,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 10:07:29,953 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537871687] [2019-12-07 10:07:29,953 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 10:07:29,954 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-12-07 10:07:29,954 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105616553] [2019-12-07 10:07:29,957 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-07 10:07:29,957 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 10:07:29,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-07 10:07:29,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-12-07 10:07:29,968 INFO L87 Difference]: Start difference. First operand 40 states. Second operand 4 states. [2019-12-07 10:07:30,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 10:07:30,067 INFO L93 Difference]: Finished difference Result 58 states and 63 transitions. [2019-12-07 10:07:30,067 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-07 10:07:30,068 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2019-12-07 10:07:30,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 10:07:30,074 INFO L225 Difference]: With dead ends: 58 [2019-12-07 10:07:30,074 INFO L226 Difference]: Without dead ends: 54 [2019-12-07 10:07:30,076 INFO L630 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 [2019-12-07 10:07:30,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-12-07 10:07:30,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 39. [2019-12-07 10:07:30,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-12-07 10:07:30,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2019-12-07 10:07:30,102 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 10 [2019-12-07 10:07:30,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 10:07:30,103 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2019-12-07 10:07:30,103 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-07 10:07:30,103 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2019-12-07 10:07:30,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-07 10:07:30,103 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 10:07:30,103 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 10:07:30,103 INFO L410 AbstractCegarLoop]: === Iteration 2 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-12-07 10:07:30,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 10:07:30,104 INFO L82 PathProgramCache]: Analyzing trace with hash -941983064, now seen corresponding path program 1 times [2019-12-07 10:07:30,104 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 10:07:30,104 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947046311] [2019-12-07 10:07:30,104 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 10:07:30,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:07:30,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:07:30,157 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 10:07:30,157 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947046311] [2019-12-07 10:07:30,158 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 10:07:30,158 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-12-07 10:07:30,158 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814263741] [2019-12-07 10:07:30,159 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-12-07 10:07:30,159 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 10:07:30,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-12-07 10:07:30,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-12-07 10:07:30,159 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand 6 states. [2019-12-07 10:07:30,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 10:07:30,262 INFO L93 Difference]: Finished difference Result 59 states and 62 transitions. [2019-12-07 10:07:30,262 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-07 10:07:30,263 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2019-12-07 10:07:30,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 10:07:30,264 INFO L225 Difference]: With dead ends: 59 [2019-12-07 10:07:30,264 INFO L226 Difference]: Without dead ends: 59 [2019-12-07 10:07:30,264 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-12-07 10:07:30,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-12-07 10:07:30,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 45. [2019-12-07 10:07:30,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2019-12-07 10:07:30,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 48 transitions. [2019-12-07 10:07:30,270 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 48 transitions. Word has length 11 [2019-12-07 10:07:30,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 10:07:30,271 INFO L462 AbstractCegarLoop]: Abstraction has 45 states and 48 transitions. [2019-12-07 10:07:30,271 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-12-07 10:07:30,271 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 48 transitions. [2019-12-07 10:07:30,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-12-07 10:07:30,271 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 10:07:30,271 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 10:07:30,271 INFO L410 AbstractCegarLoop]: === Iteration 3 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-12-07 10:07:30,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 10:07:30,272 INFO L82 PathProgramCache]: Analyzing trace with hash 143250926, now seen corresponding path program 1 times [2019-12-07 10:07:30,272 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 10:07:30,272 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496123826] [2019-12-07 10:07:30,272 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 10:07:30,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:07:30,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:07:30,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:07:30,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 10:07:30,311 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496123826] [2019-12-07 10:07:30,311 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 10:07:30,311 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-12-07 10:07:30,311 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766881816] [2019-12-07 10:07:30,312 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-07 10:07:30,312 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 10:07:30,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-07 10:07:30,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-12-07 10:07:30,313 INFO L87 Difference]: Start difference. First operand 45 states and 48 transitions. Second operand 4 states. [2019-12-07 10:07:30,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 10:07:30,360 INFO L93 Difference]: Finished difference Result 43 states and 46 transitions. [2019-12-07 10:07:30,360 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-07 10:07:30,360 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2019-12-07 10:07:30,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 10:07:30,362 INFO L225 Difference]: With dead ends: 43 [2019-12-07 10:07:30,363 INFO L226 Difference]: Without dead ends: 43 [2019-12-07 10:07:30,363 INFO L630 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 [2019-12-07 10:07:30,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-12-07 10:07:30,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2019-12-07 10:07:30,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-12-07 10:07:30,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 46 transitions. [2019-12-07 10:07:30,369 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 46 transitions. Word has length 15 [2019-12-07 10:07:30,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 10:07:30,369 INFO L462 AbstractCegarLoop]: Abstraction has 43 states and 46 transitions. [2019-12-07 10:07:30,369 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-07 10:07:30,369 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 46 transitions. [2019-12-07 10:07:30,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-12-07 10:07:30,370 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 10:07:30,370 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 10:07:30,370 INFO L410 AbstractCegarLoop]: === Iteration 4 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-12-07 10:07:30,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 10:07:30,370 INFO L82 PathProgramCache]: Analyzing trace with hash 143250927, now seen corresponding path program 1 times [2019-12-07 10:07:30,371 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 10:07:30,371 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370564778] [2019-12-07 10:07:30,371 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 10:07:30,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:07:30,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:07:30,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:07:30,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 10:07:30,416 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370564778] [2019-12-07 10:07:30,416 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 10:07:30,416 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-12-07 10:07:30,416 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097153755] [2019-12-07 10:07:30,416 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-07 10:07:30,417 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 10:07:30,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-07 10:07:30,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-12-07 10:07:30,417 INFO L87 Difference]: Start difference. First operand 43 states and 46 transitions. Second operand 4 states. [2019-12-07 10:07:30,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 10:07:30,472 INFO L93 Difference]: Finished difference Result 47 states and 50 transitions. [2019-12-07 10:07:30,473 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-07 10:07:30,473 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2019-12-07 10:07:30,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 10:07:30,473 INFO L225 Difference]: With dead ends: 47 [2019-12-07 10:07:30,474 INFO L226 Difference]: Without dead ends: 47 [2019-12-07 10:07:30,474 INFO L630 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 [2019-12-07 10:07:30,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-12-07 10:07:30,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2019-12-07 10:07:30,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2019-12-07 10:07:30,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 48 transitions. [2019-12-07 10:07:30,477 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 48 transitions. Word has length 15 [2019-12-07 10:07:30,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 10:07:30,478 INFO L462 AbstractCegarLoop]: Abstraction has 45 states and 48 transitions. [2019-12-07 10:07:30,478 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-07 10:07:30,478 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 48 transitions. [2019-12-07 10:07:30,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-12-07 10:07:30,478 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 10:07:30,478 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 10:07:30,479 INFO L410 AbstractCegarLoop]: === Iteration 5 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-12-07 10:07:30,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 10:07:30,479 INFO L82 PathProgramCache]: Analyzing trace with hash -1902162976, now seen corresponding path program 1 times [2019-12-07 10:07:30,479 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 10:07:30,479 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447230005] [2019-12-07 10:07:30,479 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 10:07:30,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:07:30,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:07:30,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:07:30,524 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 10:07:30,525 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447230005] [2019-12-07 10:07:30,525 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372542261] [2019-12-07 10:07:30,525 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2f91cb08-60bb-48bc-b428-c44edb1aa750/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 [2019-12-07 10:07:30,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:07:30,556 INFO L264 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 3 conjunts are in the unsatisfiable core [2019-12-07 10:07:30,561 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 10:07:30,585 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 10:07:30,586 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 10:07:30,586 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2019-12-07 10:07:30,586 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303712613] [2019-12-07 10:07:30,586 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-12-07 10:07:30,587 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 10:07:30,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-12-07 10:07:30,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-12-07 10:07:30,587 INFO L87 Difference]: Start difference. First operand 45 states and 48 transitions. Second operand 6 states. [2019-12-07 10:07:30,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 10:07:30,659 INFO L93 Difference]: Finished difference Result 69 states and 73 transitions. [2019-12-07 10:07:30,660 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-07 10:07:30,660 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2019-12-07 10:07:30,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 10:07:30,661 INFO L225 Difference]: With dead ends: 69 [2019-12-07 10:07:30,661 INFO L226 Difference]: Without dead ends: 69 [2019-12-07 10:07:30,661 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-12-07 10:07:30,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2019-12-07 10:07:30,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 52. [2019-12-07 10:07:30,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-12-07 10:07:30,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 57 transitions. [2019-12-07 10:07:30,666 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 57 transitions. Word has length 21 [2019-12-07 10:07:30,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 10:07:30,666 INFO L462 AbstractCegarLoop]: Abstraction has 52 states and 57 transitions. [2019-12-07 10:07:30,666 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-12-07 10:07:30,666 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 57 transitions. [2019-12-07 10:07:30,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-12-07 10:07:30,666 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 10:07:30,667 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 10:07:30,867 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 10:07:30,868 INFO L410 AbstractCegarLoop]: === Iteration 6 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-12-07 10:07:30,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 10:07:30,868 INFO L82 PathProgramCache]: Analyzing trace with hash 1165178250, now seen corresponding path program 1 times [2019-12-07 10:07:30,868 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 10:07:30,869 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745467996] [2019-12-07 10:07:30,869 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 10:07:30,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:07:30,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:07:30,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:07:30,969 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-12-07 10:07:30,970 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745467996] [2019-12-07 10:07:30,970 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 10:07:30,970 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-12-07 10:07:30,971 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298863925] [2019-12-07 10:07:30,971 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-12-07 10:07:30,971 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 10:07:30,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-12-07 10:07:30,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-12-07 10:07:30,972 INFO L87 Difference]: Start difference. First operand 52 states and 57 transitions. Second operand 6 states. [2019-12-07 10:07:31,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 10:07:31,076 INFO L93 Difference]: Finished difference Result 62 states and 68 transitions. [2019-12-07 10:07:31,076 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-07 10:07:31,076 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2019-12-07 10:07:31,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 10:07:31,077 INFO L225 Difference]: With dead ends: 62 [2019-12-07 10:07:31,077 INFO L226 Difference]: Without dead ends: 62 [2019-12-07 10:07:31,077 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-12-07 10:07:31,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-12-07 10:07:31,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 54. [2019-12-07 10:07:31,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-12-07 10:07:31,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 60 transitions. [2019-12-07 10:07:31,081 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 60 transitions. Word has length 22 [2019-12-07 10:07:31,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 10:07:31,081 INFO L462 AbstractCegarLoop]: Abstraction has 54 states and 60 transitions. [2019-12-07 10:07:31,082 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-12-07 10:07:31,082 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 60 transitions. [2019-12-07 10:07:31,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-12-07 10:07:31,082 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 10:07:31,082 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 10:07:31,083 INFO L410 AbstractCegarLoop]: === Iteration 7 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-12-07 10:07:31,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 10:07:31,083 INFO L82 PathProgramCache]: Analyzing trace with hash 1760787427, now seen corresponding path program 1 times [2019-12-07 10:07:31,083 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 10:07:31,083 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115859346] [2019-12-07 10:07:31,083 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 10:07:31,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:07:31,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:07:31,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:07:31,120 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 10:07:31,120 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115859346] [2019-12-07 10:07:31,121 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 10:07:31,121 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-12-07 10:07:31,121 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106182075] [2019-12-07 10:07:31,121 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-12-07 10:07:31,121 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 10:07:31,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-12-07 10:07:31,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-12-07 10:07:31,122 INFO L87 Difference]: Start difference. First operand 54 states and 60 transitions. Second operand 6 states. [2019-12-07 10:07:31,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 10:07:31,187 INFO L93 Difference]: Finished difference Result 53 states and 59 transitions. [2019-12-07 10:07:31,187 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-07 10:07:31,187 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2019-12-07 10:07:31,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 10:07:31,188 INFO L225 Difference]: With dead ends: 53 [2019-12-07 10:07:31,188 INFO L226 Difference]: Without dead ends: 53 [2019-12-07 10:07:31,188 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-12-07 10:07:31,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-12-07 10:07:31,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2019-12-07 10:07:31,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-12-07 10:07:31,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 59 transitions. [2019-12-07 10:07:31,192 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 59 transitions. Word has length 23 [2019-12-07 10:07:31,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 10:07:31,192 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 59 transitions. [2019-12-07 10:07:31,192 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-12-07 10:07:31,192 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 59 transitions. [2019-12-07 10:07:31,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-12-07 10:07:31,193 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 10:07:31,193 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 10:07:31,193 INFO L410 AbstractCegarLoop]: === Iteration 8 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-12-07 10:07:31,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 10:07:31,194 INFO L82 PathProgramCache]: Analyzing trace with hash 1760787428, now seen corresponding path program 1 times [2019-12-07 10:07:31,194 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 10:07:31,194 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727459999] [2019-12-07 10:07:31,194 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 10:07:31,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:07:31,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:07:31,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:07:31,290 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 10:07:31,290 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727459999] [2019-12-07 10:07:31,290 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 10:07:31,291 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2019-12-07 10:07:31,291 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182531019] [2019-12-07 10:07:31,291 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-07 10:07:31,291 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 10:07:31,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-07 10:07:31,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2019-12-07 10:07:31,292 INFO L87 Difference]: Start difference. First operand 53 states and 59 transitions. Second operand 10 states. [2019-12-07 10:07:31,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 10:07:31,483 INFO L93 Difference]: Finished difference Result 55 states and 61 transitions. [2019-12-07 10:07:31,483 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-07 10:07:31,483 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 23 [2019-12-07 10:07:31,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 10:07:31,484 INFO L225 Difference]: With dead ends: 55 [2019-12-07 10:07:31,484 INFO L226 Difference]: Without dead ends: 55 [2019-12-07 10:07:31,484 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2019-12-07 10:07:31,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-12-07 10:07:31,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 52. [2019-12-07 10:07:31,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-12-07 10:07:31,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 58 transitions. [2019-12-07 10:07:31,488 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 58 transitions. Word has length 23 [2019-12-07 10:07:31,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 10:07:31,488 INFO L462 AbstractCegarLoop]: Abstraction has 52 states and 58 transitions. [2019-12-07 10:07:31,488 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-07 10:07:31,488 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 58 transitions. [2019-12-07 10:07:31,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-12-07 10:07:31,488 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 10:07:31,489 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 10:07:31,489 INFO L410 AbstractCegarLoop]: === Iteration 9 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-12-07 10:07:31,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 10:07:31,489 INFO L82 PathProgramCache]: Analyzing trace with hash 1134972881, now seen corresponding path program 1 times [2019-12-07 10:07:31,489 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 10:07:31,489 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018442810] [2019-12-07 10:07:31,489 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 10:07:31,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:07:31,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:07:31,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:07:31,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:07:31,553 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-12-07 10:07:31,553 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018442810] [2019-12-07 10:07:31,553 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 10:07:31,553 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-12-07 10:07:31,553 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170512674] [2019-12-07 10:07:31,554 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-07 10:07:31,554 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 10:07:31,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-07 10:07:31,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-12-07 10:07:31,554 INFO L87 Difference]: Start difference. First operand 52 states and 58 transitions. Second operand 7 states. [2019-12-07 10:07:31,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 10:07:31,623 INFO L93 Difference]: Finished difference Result 52 states and 57 transitions. [2019-12-07 10:07:31,623 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-07 10:07:31,623 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2019-12-07 10:07:31,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 10:07:31,624 INFO L225 Difference]: With dead ends: 52 [2019-12-07 10:07:31,624 INFO L226 Difference]: Without dead ends: 52 [2019-12-07 10:07:31,624 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-12-07 10:07:31,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-12-07 10:07:31,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2019-12-07 10:07:31,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-12-07 10:07:31,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 56 transitions. [2019-12-07 10:07:31,627 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 56 transitions. Word has length 26 [2019-12-07 10:07:31,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 10:07:31,628 INFO L462 AbstractCegarLoop]: Abstraction has 51 states and 56 transitions. [2019-12-07 10:07:31,628 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-07 10:07:31,628 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 56 transitions. [2019-12-07 10:07:31,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-12-07 10:07:31,628 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 10:07:31,629 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 10:07:31,629 INFO L410 AbstractCegarLoop]: === Iteration 10 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-12-07 10:07:31,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 10:07:31,629 INFO L82 PathProgramCache]: Analyzing trace with hash -1992931931, now seen corresponding path program 1 times [2019-12-07 10:07:31,629 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 10:07:31,630 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075782447] [2019-12-07 10:07:31,630 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 10:07:31,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:07:31,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:07:31,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:07:31,682 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 10:07:31,682 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075782447] [2019-12-07 10:07:31,682 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904984011] [2019-12-07 10:07:31,683 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2f91cb08-60bb-48bc-b428-c44edb1aa750/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 [2019-12-07 10:07:31,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:07:31,709 INFO L264 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-07 10:07:31,710 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 10:07:31,745 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 10:07:31,745 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 10:07:31,745 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 12 [2019-12-07 10:07:31,745 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714156664] [2019-12-07 10:07:31,746 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-07 10:07:31,746 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 10:07:31,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-07 10:07:31,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2019-12-07 10:07:31,746 INFO L87 Difference]: Start difference. First operand 51 states and 56 transitions. Second operand 12 states. [2019-12-07 10:07:31,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 10:07:31,889 INFO L93 Difference]: Finished difference Result 78 states and 83 transitions. [2019-12-07 10:07:31,890 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-07 10:07:31,890 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 27 [2019-12-07 10:07:31,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 10:07:31,891 INFO L225 Difference]: With dead ends: 78 [2019-12-07 10:07:31,891 INFO L226 Difference]: Without dead ends: 78 [2019-12-07 10:07:31,891 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2019-12-07 10:07:31,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2019-12-07 10:07:31,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 62. [2019-12-07 10:07:31,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-12-07 10:07:31,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 68 transitions. [2019-12-07 10:07:31,895 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 68 transitions. Word has length 27 [2019-12-07 10:07:31,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 10:07:31,895 INFO L462 AbstractCegarLoop]: Abstraction has 62 states and 68 transitions. [2019-12-07 10:07:31,896 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-07 10:07:31,896 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 68 transitions. [2019-12-07 10:07:31,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-12-07 10:07:31,896 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 10:07:31,896 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 10:07:32,097 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 10:07:32,097 INFO L410 AbstractCegarLoop]: === Iteration 11 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-12-07 10:07:32,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 10:07:32,097 INFO L82 PathProgramCache]: Analyzing trace with hash -1979886526, now seen corresponding path program 2 times [2019-12-07 10:07:32,098 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 10:07:32,098 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324049969] [2019-12-07 10:07:32,098 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 10:07:32,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:07:32,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:07:32,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:07:32,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:07:32,136 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-12-07 10:07:32,136 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324049969] [2019-12-07 10:07:32,136 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51073922] [2019-12-07 10:07:32,136 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2f91cb08-60bb-48bc-b428-c44edb1aa750/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 [2019-12-07 10:07:32,158 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2019-12-07 10:07:32,159 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 10:07:32,159 INFO L264 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-07 10:07:32,161 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 10:07:32,192 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-12-07 10:07:32,192 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 10:07:32,196 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 10:07:32,196 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-12-07 10:07:32,197 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2019-12-07 10:07:32,264 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-12-07 10:07:32,264 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-12-07 10:07:32,265 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 10 [2019-12-07 10:07:32,265 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472086874] [2019-12-07 10:07:32,265 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-12-07 10:07:32,265 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 10:07:32,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-12-07 10:07:32,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2019-12-07 10:07:32,265 INFO L87 Difference]: Start difference. First operand 62 states and 68 transitions. Second operand 6 states. [2019-12-07 10:07:32,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 10:07:32,287 INFO L93 Difference]: Finished difference Result 61 states and 67 transitions. [2019-12-07 10:07:32,287 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-07 10:07:32,287 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 32 [2019-12-07 10:07:32,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 10:07:32,287 INFO L225 Difference]: With dead ends: 61 [2019-12-07 10:07:32,288 INFO L226 Difference]: Without dead ends: 61 [2019-12-07 10:07:32,288 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2019-12-07 10:07:32,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2019-12-07 10:07:32,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2019-12-07 10:07:32,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-12-07 10:07:32,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 67 transitions. [2019-12-07 10:07:32,292 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 67 transitions. Word has length 32 [2019-12-07 10:07:32,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 10:07:32,293 INFO L462 AbstractCegarLoop]: Abstraction has 61 states and 67 transitions. [2019-12-07 10:07:32,293 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-12-07 10:07:32,293 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 67 transitions. [2019-12-07 10:07:32,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-12-07 10:07:32,294 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 10:07:32,294 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 10:07:32,494 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 10:07:32,495 INFO L410 AbstractCegarLoop]: === Iteration 12 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-12-07 10:07:32,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 10:07:32,496 INFO L82 PathProgramCache]: Analyzing trace with hash -13619034, now seen corresponding path program 1 times [2019-12-07 10:07:32,496 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 10:07:32,496 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068490330] [2019-12-07 10:07:32,496 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 10:07:32,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:07:32,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:07:32,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:07:32,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:07:32,574 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-12-07 10:07:32,574 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068490330] [2019-12-07 10:07:32,574 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147213412] [2019-12-07 10:07:32,574 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2f91cb08-60bb-48bc-b428-c44edb1aa750/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 [2019-12-07 10:07:32,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:07:32,630 INFO L264 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-07 10:07:32,632 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 10:07:32,661 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 10:07:32,661 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-12-07 10:07:32,661 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2019-12-07 10:07:32,661 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806331220] [2019-12-07 10:07:32,662 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-12-07 10:07:32,662 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 10:07:32,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-12-07 10:07:32,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2019-12-07 10:07:32,662 INFO L87 Difference]: Start difference. First operand 61 states and 67 transitions. Second operand 6 states. [2019-12-07 10:07:32,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 10:07:32,722 INFO L93 Difference]: Finished difference Result 73 states and 76 transitions. [2019-12-07 10:07:32,722 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-07 10:07:32,722 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 35 [2019-12-07 10:07:32,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 10:07:32,723 INFO L225 Difference]: With dead ends: 73 [2019-12-07 10:07:32,723 INFO L226 Difference]: Without dead ends: 67 [2019-12-07 10:07:32,723 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2019-12-07 10:07:32,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-12-07 10:07:32,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 61. [2019-12-07 10:07:32,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-12-07 10:07:32,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 65 transitions. [2019-12-07 10:07:32,726 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 65 transitions. Word has length 35 [2019-12-07 10:07:32,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 10:07:32,726 INFO L462 AbstractCegarLoop]: Abstraction has 61 states and 65 transitions. [2019-12-07 10:07:32,726 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-12-07 10:07:32,726 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 65 transitions. [2019-12-07 10:07:32,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-12-07 10:07:32,727 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 10:07:32,727 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 10:07:32,927 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 10:07:32,928 INFO L410 AbstractCegarLoop]: === Iteration 13 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-12-07 10:07:32,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 10:07:32,928 INFO L82 PathProgramCache]: Analyzing trace with hash -548707221, now seen corresponding path program 1 times [2019-12-07 10:07:32,929 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 10:07:32,929 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840368266] [2019-12-07 10:07:32,929 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 10:07:32,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:07:32,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:07:32,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:07:32,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:07:32,999 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-12-07 10:07:32,999 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840368266] [2019-12-07 10:07:33,000 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980788570] [2019-12-07 10:07:33,000 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2f91cb08-60bb-48bc-b428-c44edb1aa750/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 [2019-12-07 10:07:33,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:07:33,058 INFO L264 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-07 10:07:33,062 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 10:07:33,078 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-12-07 10:07:33,079 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 10:07:33,079 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2019-12-07 10:07:33,079 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084249076] [2019-12-07 10:07:33,080 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-07 10:07:33,080 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 10:07:33,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-07 10:07:33,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-12-07 10:07:33,081 INFO L87 Difference]: Start difference. First operand 61 states and 65 transitions. Second operand 7 states. [2019-12-07 10:07:33,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 10:07:33,168 INFO L93 Difference]: Finished difference Result 87 states and 91 transitions. [2019-12-07 10:07:33,168 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-07 10:07:33,169 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 40 [2019-12-07 10:07:33,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 10:07:33,169 INFO L225 Difference]: With dead ends: 87 [2019-12-07 10:07:33,170 INFO L226 Difference]: Without dead ends: 87 [2019-12-07 10:07:33,170 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-12-07 10:07:33,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2019-12-07 10:07:33,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 70. [2019-12-07 10:07:33,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2019-12-07 10:07:33,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 75 transitions. [2019-12-07 10:07:33,174 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 75 transitions. Word has length 40 [2019-12-07 10:07:33,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 10:07:33,174 INFO L462 AbstractCegarLoop]: Abstraction has 70 states and 75 transitions. [2019-12-07 10:07:33,174 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-07 10:07:33,174 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 75 transitions. [2019-12-07 10:07:33,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-12-07 10:07:33,175 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 10:07:33,175 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 10:07:33,376 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 10:07:33,376 INFO L410 AbstractCegarLoop]: === Iteration 14 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-12-07 10:07:33,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 10:07:33,377 INFO L82 PathProgramCache]: Analyzing trace with hash -174164318, now seen corresponding path program 2 times [2019-12-07 10:07:33,377 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 10:07:33,378 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944101236] [2019-12-07 10:07:33,378 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 10:07:33,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:07:33,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:07:33,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:07:33,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:07:33,500 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-12-07 10:07:33,501 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944101236] [2019-12-07 10:07:33,501 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909875967] [2019-12-07 10:07:33,501 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2f91cb08-60bb-48bc-b428-c44edb1aa750/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 [2019-12-07 10:07:33,564 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-07 10:07:33,565 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 10:07:33,566 INFO L264 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-07 10:07:33,570 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 10:07:33,581 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-12-07 10:07:33,582 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 10:07:33,582 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 7 [2019-12-07 10:07:33,582 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95783304] [2019-12-07 10:07:33,583 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-07 10:07:33,583 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 10:07:33,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-07 10:07:33,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-12-07 10:07:33,584 INFO L87 Difference]: Start difference. First operand 70 states and 75 transitions. Second operand 8 states. [2019-12-07 10:07:33,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 10:07:33,676 INFO L93 Difference]: Finished difference Result 72 states and 77 transitions. [2019-12-07 10:07:33,677 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-07 10:07:33,677 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 43 [2019-12-07 10:07:33,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 10:07:33,677 INFO L225 Difference]: With dead ends: 72 [2019-12-07 10:07:33,677 INFO L226 Difference]: Without dead ends: 72 [2019-12-07 10:07:33,678 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2019-12-07 10:07:33,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2019-12-07 10:07:33,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 68. [2019-12-07 10:07:33,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2019-12-07 10:07:33,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 73 transitions. [2019-12-07 10:07:33,680 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 73 transitions. Word has length 43 [2019-12-07 10:07:33,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 10:07:33,680 INFO L462 AbstractCegarLoop]: Abstraction has 68 states and 73 transitions. [2019-12-07 10:07:33,680 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-07 10:07:33,681 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 73 transitions. [2019-12-07 10:07:33,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-12-07 10:07:33,681 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 10:07:33,681 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 10:07:33,882 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 10:07:33,883 INFO L410 AbstractCegarLoop]: === Iteration 15 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-12-07 10:07:33,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 10:07:33,883 INFO L82 PathProgramCache]: Analyzing trace with hash -1444841842, now seen corresponding path program 2 times [2019-12-07 10:07:33,883 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 10:07:33,884 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133577248] [2019-12-07 10:07:33,884 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 10:07:33,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:07:33,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:07:33,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:07:33,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:07:33,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:07:33,977 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-12-07 10:07:33,978 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133577248] [2019-12-07 10:07:33,978 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542675347] [2019-12-07 10:07:33,978 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2f91cb08-60bb-48bc-b428-c44edb1aa750/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 [2019-12-07 10:07:34,021 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2019-12-07 10:07:34,022 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 10:07:34,022 INFO L264 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-07 10:07:34,027 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 10:07:34,070 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 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 12 treesize of output 9 [2019-12-07 10:07:34,071 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 10:07:34,074 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 10:07:34,074 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-12-07 10:07:34,075 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:12, output treesize:5 [2019-12-07 10:07:34,110 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 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 12 treesize of output 9 [2019-12-07 10:07:34,111 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 10:07:34,112 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 10:07:34,112 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-12-07 10:07:34,113 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:12, output treesize:5 [2019-12-07 10:07:34,133 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 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 12 treesize of output 9 [2019-12-07 10:07:34,134 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 10:07:34,135 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 10:07:34,135 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-12-07 10:07:34,135 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:12, output treesize:5 [2019-12-07 10:07:34,169 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2019-12-07 10:07:34,169 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-12-07 10:07:34,169 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 11 [2019-12-07 10:07:34,169 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267158003] [2019-12-07 10:07:34,169 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-12-07 10:07:34,169 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 10:07:34,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-12-07 10:07:34,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2019-12-07 10:07:34,170 INFO L87 Difference]: Start difference. First operand 68 states and 73 transitions. Second operand 6 states. [2019-12-07 10:07:34,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 10:07:34,211 INFO L93 Difference]: Finished difference Result 67 states and 72 transitions. [2019-12-07 10:07:34,211 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-07 10:07:34,211 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 56 [2019-12-07 10:07:34,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 10:07:34,211 INFO L225 Difference]: With dead ends: 67 [2019-12-07 10:07:34,211 INFO L226 Difference]: Without dead ends: 0 [2019-12-07 10:07:34,212 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 55 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2019-12-07 10:07:34,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-12-07 10:07:34,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-12-07 10:07:34,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-12-07 10:07:34,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-12-07 10:07:34,212 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 56 [2019-12-07 10:07:34,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 10:07:34,212 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-12-07 10:07:34,212 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-12-07 10:07:34,212 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-12-07 10:07:34,212 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-12-07 10:07:34,413 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 10:07:34,419 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.12 10:07:34 BoogieIcfgContainer [2019-12-07 10:07:34,419 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-12-07 10:07:34,420 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-12-07 10:07:34,420 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-12-07 10:07:34,420 INFO L275 PluginConnector]: Witness Printer initialized [2019-12-07 10:07:34,421 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 10:07:29" (3/4) ... [2019-12-07 10:07:34,425 INFO L137 WitnessPrinter]: Generating witness for correct program [2019-12-07 10:07:34,433 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2019-12-07 10:07:34,434 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure foo [2019-12-07 10:07:34,434 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2019-12-07 10:07:34,440 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 15 nodes and edges [2019-12-07 10:07:34,441 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 10 nodes and edges [2019-12-07 10:07:34,441 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2019-12-07 10:07:34,441 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2019-12-07 10:07:34,479 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_2f91cb08-60bb-48bc-b428-c44edb1aa750/bin/uautomizer/witness.graphml [2019-12-07 10:07:34,479 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-12-07 10:07:34,480 INFO L168 Benchmark]: Toolchain (without parser) took 5090.39 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 133.2 MB). Free memory was 940.7 MB in the beginning and 1.0 GB in the end (delta: -81.7 MB). Peak memory consumption was 51.5 MB. Max. memory is 11.5 GB. [2019-12-07 10:07:34,480 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 955.4 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 10:07:34,481 INFO L168 Benchmark]: CACSL2BoogieTranslator took 178.76 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 87.6 MB). Free memory was 940.7 MB in the beginning and 1.1 GB in the end (delta: -140.4 MB). Peak memory consumption was 23.1 MB. Max. memory is 11.5 GB. [2019-12-07 10:07:34,481 INFO L168 Benchmark]: Boogie Preprocessor took 22.33 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 10:07:34,481 INFO L168 Benchmark]: RCFGBuilder took 186.27 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 22.4 MB). Peak memory consumption was 22.4 MB. Max. memory is 11.5 GB. [2019-12-07 10:07:34,481 INFO L168 Benchmark]: TraceAbstraction took 4640.78 ms. Allocated memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: 45.6 MB). Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 34.2 MB). Peak memory consumption was 79.9 MB. Max. memory is 11.5 GB. [2019-12-07 10:07:34,482 INFO L168 Benchmark]: Witness Printer took 59.35 ms. Allocated memory is still 1.2 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 11.5 GB. [2019-12-07 10:07:34,483 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 955.4 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 178.76 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 87.6 MB). Free memory was 940.7 MB in the beginning and 1.1 GB in the end (delta: -140.4 MB). Peak memory consumption was 23.1 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 22.33 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 186.27 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 22.4 MB). Peak memory consumption was 22.4 MB. Max. memory is 11.5 GB. * TraceAbstraction took 4640.78 ms. Allocated memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: 45.6 MB). Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 34.2 MB). Peak memory consumption was 79.9 MB. Max. memory is 11.5 GB. * Witness Printer took 59.35 ms. Allocated memory is still 1.2 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 15]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 15]: array index is always in bounds For all program executions holds that array index is always in bounds at this location - PositiveResult [Line: 15]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 26]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 26]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 20]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 23]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 23]: 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. Result: SAFE, OverallTime: 4.6s, OverallIterations: 15, TraceHistogramMax: 3, AutomataDifference: 1.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 353 SDtfs, 602 SDslu, 559 SDs, 0 SdLazy, 1287 SolverSat, 121 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 420 GetRequests, 306 SyntacticMatches, 9 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=70occurred in iteration=13, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 15 MinimizatonAttempts, 103 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.1s InterpolantComputationTime, 653 NumberOfCodeBlocks, 588 NumberOfCodeBlocksAsserted, 23 NumberOfCheckSat, 631 ConstructedInterpolants, 36 QuantifiedInterpolants, 74548 SizeOfPredicates, 11 NumberOfNonLiveVariables, 711 ConjunctsInSsa, 40 ConjunctsInUnsatCore, 22 InterpolantComputations, 11 PerfectInterpolantSequences, 215/277 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...