./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength6.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version cad46833 Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_c1f7012d-27e5-4027-98be-6133441b9503/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_c1f7012d-27e5-4027-98be-6133441b9503/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_c1f7012d-27e5-4027-98be-6133441b9503/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_c1f7012d-27e5-4027-98be-6133441b9503/bin/uautomizer/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength6.c -s /tmp/vcloud-vcloud-master/worker/working_dir_c1f7012d-27e5-4027-98be-6133441b9503/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_c1f7012d-27e5-4027-98be-6133441b9503/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 07b05923cf5c1b39a35ab81b524575a0a488c268 ....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.24-cad4683 [2019-10-22 08:56:12,658 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-22 08:56:12,660 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-22 08:56:12,669 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-22 08:56:12,672 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-22 08:56:12,673 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-22 08:56:12,674 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-22 08:56:12,675 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-22 08:56:12,676 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-22 08:56:12,677 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-22 08:56:12,678 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-22 08:56:12,680 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-22 08:56:12,681 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-22 08:56:12,683 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-22 08:56:12,684 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-22 08:56:12,686 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-22 08:56:12,693 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-22 08:56:12,694 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-22 08:56:12,695 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-22 08:56:12,696 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-22 08:56:12,697 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-22 08:56:12,698 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-22 08:56:12,703 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-22 08:56:12,704 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-22 08:56:12,706 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-22 08:56:12,709 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-22 08:56:12,710 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-22 08:56:12,710 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-22 08:56:12,711 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-22 08:56:12,711 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-22 08:56:12,711 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-22 08:56:12,712 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-22 08:56:12,712 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-22 08:56:12,713 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-22 08:56:12,713 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-22 08:56:12,714 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-22 08:56:12,714 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-22 08:56:12,714 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-22 08:56:12,714 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-22 08:56:12,717 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-22 08:56:12,718 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-22 08:56:12,718 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_c1f7012d-27e5-4027-98be-6133441b9503/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2019-10-22 08:56:12,736 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-22 08:56:12,736 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-22 08:56:12,736 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-22 08:56:12,737 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-22 08:56:12,737 INFO L138 SettingsManager]: * Use SBE=true [2019-10-22 08:56:12,737 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-22 08:56:12,737 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-22 08:56:12,737 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-10-22 08:56:12,737 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-22 08:56:12,737 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-22 08:56:12,737 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-22 08:56:12,738 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2019-10-22 08:56:12,738 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2019-10-22 08:56:12,738 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2019-10-22 08:56:12,738 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-22 08:56:12,738 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-22 08:56:12,738 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-22 08:56:12,738 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-22 08:56:12,738 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-22 08:56:12,743 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-22 08:56:12,744 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-22 08:56:12,744 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-22 08:56:12,744 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-22 08:56:12,744 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-22 08:56:12,744 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-22 08:56:12,745 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-22 08:56:12,745 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/working_dir_c1f7012d-27e5-4027-98be-6133441b9503/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 -> 07b05923cf5c1b39a35ab81b524575a0a488c268 [2019-10-22 08:56:12,768 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-22 08:56:12,780 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-22 08:56:12,784 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-22 08:56:12,785 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-22 08:56:12,785 INFO L275 PluginConnector]: CDTParser initialized [2019-10-22 08:56:12,785 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_c1f7012d-27e5-4027-98be-6133441b9503/bin/uautomizer/../../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength6.c [2019-10-22 08:56:12,829 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_c1f7012d-27e5-4027-98be-6133441b9503/bin/uautomizer/data/c6f547c64/8cda878b848b4d5798945f0d0320772d/FLAG847d91916 [2019-10-22 08:56:13,208 INFO L306 CDTParser]: Found 1 translation units. [2019-10-22 08:56:13,208 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_c1f7012d-27e5-4027-98be-6133441b9503/sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength6.c [2019-10-22 08:56:13,217 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_c1f7012d-27e5-4027-98be-6133441b9503/bin/uautomizer/data/c6f547c64/8cda878b848b4d5798945f0d0320772d/FLAG847d91916 [2019-10-22 08:56:13,609 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_c1f7012d-27e5-4027-98be-6133441b9503/bin/uautomizer/data/c6f547c64/8cda878b848b4d5798945f0d0320772d [2019-10-22 08:56:13,611 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-22 08:56:13,612 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-10-22 08:56:13,613 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-22 08:56:13,613 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-22 08:56:13,616 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-22 08:56:13,617 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 08:56:13" (1/1) ... [2019-10-22 08:56:13,619 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17131983 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:56:13, skipping insertion in model container [2019-10-22 08:56:13,619 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 08:56:13" (1/1) ... [2019-10-22 08:56:13,625 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-22 08:56:13,638 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-22 08:56:13,766 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 08:56:13,773 INFO L188 MainTranslator]: Completed pre-run [2019-10-22 08:56:13,844 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 08:56:13,855 INFO L192 MainTranslator]: Completed translation [2019-10-22 08:56:13,855 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:56:13 WrapperNode [2019-10-22 08:56:13,855 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-22 08:56:13,856 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-22 08:56:13,856 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-22 08:56:13,856 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-22 08:56:13,866 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:56:13" (1/1) ... [2019-10-22 08:56:13,866 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:56:13" (1/1) ... [2019-10-22 08:56:13,873 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:56:13" (1/1) ... [2019-10-22 08:56:13,873 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:56:13" (1/1) ... [2019-10-22 08:56:13,878 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:56:13" (1/1) ... [2019-10-22 08:56:13,882 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:56:13" (1/1) ... [2019-10-22 08:56:13,883 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:56:13" (1/1) ... [2019-10-22 08:56:13,884 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-22 08:56:13,885 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-22 08:56:13,885 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-22 08:56:13,885 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-22 08:56:13,886 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:56:13" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c1f7012d-27e5-4027-98be-6133441b9503/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 [2019-10-22 08:56:13,947 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-22 08:56:13,947 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-22 08:56:13,947 INFO L138 BoogieDeclarations]: Found implementation of procedure foo [2019-10-22 08:56:13,948 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-22 08:56:13,948 INFO L130 BoogieDeclarations]: Found specification of procedure foo [2019-10-22 08:56:13,948 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-22 08:56:13,948 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-22 08:56:13,948 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-22 08:56:13,948 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-22 08:56:13,949 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-22 08:56:13,949 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-22 08:56:13,949 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-22 08:56:14,248 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-22 08:56:14,248 INFO L284 CfgBuilder]: Removed 3 assume(true) statements. [2019-10-22 08:56:14,249 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 08:56:14 BoogieIcfgContainer [2019-10-22 08:56:14,249 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-22 08:56:14,250 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-22 08:56:14,250 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-22 08:56:14,253 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-22 08:56:14,253 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.10 08:56:13" (1/3) ... [2019-10-22 08:56:14,254 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e855972 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 08:56:14, skipping insertion in model container [2019-10-22 08:56:14,254 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:56:13" (2/3) ... [2019-10-22 08:56:14,254 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e855972 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 08:56:14, skipping insertion in model container [2019-10-22 08:56:14,254 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 08:56:14" (3/3) ... [2019-10-22 08:56:14,255 INFO L109 eAbstractionObserver]: Analyzing ICFG ArraysOfVariableLength6.c [2019-10-22 08:56:14,264 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-22 08:56:14,270 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 8 error locations. [2019-10-22 08:56:14,279 INFO L249 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2019-10-22 08:56:14,295 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-22 08:56:14,296 INFO L374 AbstractCegarLoop]: Hoare is false [2019-10-22 08:56:14,296 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-22 08:56:14,296 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-22 08:56:14,296 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-22 08:56:14,296 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-22 08:56:14,296 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-22 08:56:14,297 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-22 08:56:14,310 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states. [2019-10-22 08:56:14,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-10-22 08:56:14,318 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:56:14,318 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:56:14,320 INFO L410 AbstractCegarLoop]: === Iteration 1 === [fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr2REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION]=== [2019-10-22 08:56:14,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:56:14,323 INFO L82 PathProgramCache]: Analyzing trace with hash 1909189377, now seen corresponding path program 1 times [2019-10-22 08:56:14,330 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:56:14,330 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356469265] [2019-10-22 08:56:14,330 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:14,331 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:14,331 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:56:14,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:14,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:14,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:56:14,475 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356469265] [2019-10-22 08:56:14,476 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 08:56:14,476 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-22 08:56:14,476 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972990371] [2019-10-22 08:56:14,480 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-22 08:56:14,480 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:56:14,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-22 08:56:14,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-22 08:56:14,493 INFO L87 Difference]: Start difference. First operand 40 states. Second operand 4 states. [2019-10-22 08:56:14,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:56:14,666 INFO L93 Difference]: Finished difference Result 58 states and 63 transitions. [2019-10-22 08:56:14,666 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-22 08:56:14,667 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2019-10-22 08:56:14,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:56:14,675 INFO L225 Difference]: With dead ends: 58 [2019-10-22 08:56:14,675 INFO L226 Difference]: Without dead ends: 54 [2019-10-22 08:56:14,677 INFO L600 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 [2019-10-22 08:56:14,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-10-22 08:56:14,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 39. [2019-10-22 08:56:14,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-10-22 08:56:14,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2019-10-22 08:56:14,709 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 10 [2019-10-22 08:56:14,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:56:14,709 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2019-10-22 08:56:14,709 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-22 08:56:14,710 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2019-10-22 08:56:14,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-10-22 08:56:14,710 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:56:14,710 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:56:14,711 INFO L410 AbstractCegarLoop]: === Iteration 2 === [fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr2REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION]=== [2019-10-22 08:56:14,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:56:14,711 INFO L82 PathProgramCache]: Analyzing trace with hash -941983064, now seen corresponding path program 1 times [2019-10-22 08:56:14,711 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:56:14,711 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380334717] [2019-10-22 08:56:14,711 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:14,712 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:14,712 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:56:14,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:14,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:14,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:56:14,783 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380334717] [2019-10-22 08:56:14,783 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 08:56:14,783 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-22 08:56:14,784 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656676953] [2019-10-22 08:56:14,785 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-22 08:56:14,785 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:56:14,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-22 08:56:14,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-22 08:56:14,786 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand 4 states. [2019-10-22 08:56:14,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:56:14,873 INFO L93 Difference]: Finished difference Result 49 states and 53 transitions. [2019-10-22 08:56:14,873 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-22 08:56:14,873 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2019-10-22 08:56:14,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:56:14,876 INFO L225 Difference]: With dead ends: 49 [2019-10-22 08:56:14,876 INFO L226 Difference]: Without dead ends: 49 [2019-10-22 08:56:14,876 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-22 08:56:14,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2019-10-22 08:56:14,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 41. [2019-10-22 08:56:14,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-10-22 08:56:14,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2019-10-22 08:56:14,880 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 11 [2019-10-22 08:56:14,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:56:14,881 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2019-10-22 08:56:14,881 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-22 08:56:14,881 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2019-10-22 08:56:14,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-10-22 08:56:14,881 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:56:14,882 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:56:14,882 INFO L410 AbstractCegarLoop]: === Iteration 3 === [fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr2REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION]=== [2019-10-22 08:56:14,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:56:14,882 INFO L82 PathProgramCache]: Analyzing trace with hash 863296133, now seen corresponding path program 1 times [2019-10-22 08:56:14,882 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:56:14,883 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824947350] [2019-10-22 08:56:14,883 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:14,883 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:14,883 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:56:14,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:14,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:14,987 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:56:14,987 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824947350] [2019-10-22 08:56:14,988 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 08:56:14,988 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-22 08:56:14,988 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121715847] [2019-10-22 08:56:14,988 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-22 08:56:14,988 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:56:14,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-22 08:56:14,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-10-22 08:56:14,989 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand 7 states. [2019-10-22 08:56:15,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:56:15,166 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2019-10-22 08:56:15,166 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-22 08:56:15,166 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2019-10-22 08:56:15,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:56:15,167 INFO L225 Difference]: With dead ends: 40 [2019-10-22 08:56:15,167 INFO L226 Difference]: Without dead ends: 40 [2019-10-22 08:56:15,167 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2019-10-22 08:56:15,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-10-22 08:56:15,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2019-10-22 08:56:15,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-10-22 08:56:15,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2019-10-22 08:56:15,171 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 12 [2019-10-22 08:56:15,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:56:15,172 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2019-10-22 08:56:15,172 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-22 08:56:15,172 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2019-10-22 08:56:15,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-10-22 08:56:15,172 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:56:15,173 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:56:15,173 INFO L410 AbstractCegarLoop]: === Iteration 4 === [fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr2REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION]=== [2019-10-22 08:56:15,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:56:15,173 INFO L82 PathProgramCache]: Analyzing trace with hash 863296134, now seen corresponding path program 1 times [2019-10-22 08:56:15,173 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:56:15,174 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279040692] [2019-10-22 08:56:15,174 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:15,174 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:15,174 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:56:15,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:15,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:15,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:56:15,333 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279040692] [2019-10-22 08:56:15,334 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 08:56:15,334 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-22 08:56:15,334 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247428127] [2019-10-22 08:56:15,334 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-22 08:56:15,334 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:56:15,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-22 08:56:15,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2019-10-22 08:56:15,335 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand 8 states. [2019-10-22 08:56:15,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:56:15,544 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2019-10-22 08:56:15,545 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-22 08:56:15,545 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-10-22 08:56:15,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:56:15,546 INFO L225 Difference]: With dead ends: 42 [2019-10-22 08:56:15,546 INFO L226 Difference]: Without dead ends: 42 [2019-10-22 08:56:15,546 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2019-10-22 08:56:15,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-10-22 08:56:15,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 39. [2019-10-22 08:56:15,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-10-22 08:56:15,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2019-10-22 08:56:15,553 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 12 [2019-10-22 08:56:15,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:56:15,554 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2019-10-22 08:56:15,554 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-22 08:56:15,554 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2019-10-22 08:56:15,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-10-22 08:56:15,554 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:56:15,555 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:56:15,555 INFO L410 AbstractCegarLoop]: === Iteration 5 === [fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr2REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION]=== [2019-10-22 08:56:15,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:56:15,555 INFO L82 PathProgramCache]: Analyzing trace with hash 143250926, now seen corresponding path program 1 times [2019-10-22 08:56:15,555 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:56:15,555 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659845836] [2019-10-22 08:56:15,556 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:15,556 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:15,556 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:56:15,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:15,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:15,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:15,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:56:15,644 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659845836] [2019-10-22 08:56:15,645 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 08:56:15,645 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-22 08:56:15,645 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882461582] [2019-10-22 08:56:15,645 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-22 08:56:15,646 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:56:15,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-22 08:56:15,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-22 08:56:15,646 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand 5 states. [2019-10-22 08:56:15,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:56:15,757 INFO L93 Difference]: Finished difference Result 45 states and 48 transitions. [2019-10-22 08:56:15,757 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-22 08:56:15,757 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2019-10-22 08:56:15,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:56:15,758 INFO L225 Difference]: With dead ends: 45 [2019-10-22 08:56:15,758 INFO L226 Difference]: Without dead ends: 42 [2019-10-22 08:56:15,759 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-22 08:56:15,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-10-22 08:56:15,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 39. [2019-10-22 08:56:15,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-10-22 08:56:15,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2019-10-22 08:56:15,763 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 15 [2019-10-22 08:56:15,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:56:15,763 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2019-10-22 08:56:15,763 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-22 08:56:15,763 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2019-10-22 08:56:15,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-10-22 08:56:15,764 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:56:15,764 INFO L380 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:56:15,764 INFO L410 AbstractCegarLoop]: === Iteration 6 === [fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr2REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION]=== [2019-10-22 08:56:15,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:56:15,765 INFO L82 PathProgramCache]: Analyzing trace with hash 1623425863, now seen corresponding path program 1 times [2019-10-22 08:56:15,765 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:56:15,765 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016746071] [2019-10-22 08:56:15,765 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:15,765 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:15,766 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:56:15,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:15,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:15,866 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:56:15,866 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016746071] [2019-10-22 08:56:15,866 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330106844] [2019-10-22 08:56:15,868 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c1f7012d-27e5-4027-98be-6133441b9503/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 [2019-10-22 08:56:15,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:15,909 INFO L256 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-22 08:56:15,913 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:56:15,954 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:56:15,955 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 08:56:15,955 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 3] total 9 [2019-10-22 08:56:15,955 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281634355] [2019-10-22 08:56:15,959 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-22 08:56:15,959 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:56:15,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-22 08:56:15,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2019-10-22 08:56:15,960 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand 10 states. [2019-10-22 08:56:16,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:56:16,185 INFO L93 Difference]: Finished difference Result 47 states and 50 transitions. [2019-10-22 08:56:16,185 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-22 08:56:16,185 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 16 [2019-10-22 08:56:16,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:56:16,186 INFO L225 Difference]: With dead ends: 47 [2019-10-22 08:56:16,186 INFO L226 Difference]: Without dead ends: 47 [2019-10-22 08:56:16,187 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2019-10-22 08:56:16,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-10-22 08:56:16,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2019-10-22 08:56:16,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-10-22 08:56:16,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 50 transitions. [2019-10-22 08:56:16,191 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 50 transitions. Word has length 16 [2019-10-22 08:56:16,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:56:16,191 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 50 transitions. [2019-10-22 08:56:16,192 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-22 08:56:16,192 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 50 transitions. [2019-10-22 08:56:16,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-10-22 08:56:16,192 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:56:16,192 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:56:16,393 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 08:56:16,393 INFO L410 AbstractCegarLoop]: === Iteration 7 === [fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr2REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION]=== [2019-10-22 08:56:16,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:56:16,394 INFO L82 PathProgramCache]: Analyzing trace with hash -661735507, now seen corresponding path program 1 times [2019-10-22 08:56:16,394 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:56:16,394 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529758299] [2019-10-22 08:56:16,394 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:16,394 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:16,395 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:56:16,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:16,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:16,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:16,493 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-22 08:56:16,493 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529758299] [2019-10-22 08:56:16,493 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 08:56:16,494 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-22 08:56:16,494 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012685675] [2019-10-22 08:56:16,494 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-22 08:56:16,494 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:56:16,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-22 08:56:16,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-22 08:56:16,495 INFO L87 Difference]: Start difference. First operand 47 states and 50 transitions. Second operand 4 states. [2019-10-22 08:56:16,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:56:16,543 INFO L93 Difference]: Finished difference Result 45 states and 48 transitions. [2019-10-22 08:56:16,543 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-22 08:56:16,543 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 30 [2019-10-22 08:56:16,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:56:16,544 INFO L225 Difference]: With dead ends: 45 [2019-10-22 08:56:16,544 INFO L226 Difference]: Without dead ends: 45 [2019-10-22 08:56:16,544 INFO L600 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 [2019-10-22 08:56:16,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-10-22 08:56:16,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2019-10-22 08:56:16,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2019-10-22 08:56:16,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 48 transitions. [2019-10-22 08:56:16,548 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 48 transitions. Word has length 30 [2019-10-22 08:56:16,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:56:16,548 INFO L462 AbstractCegarLoop]: Abstraction has 45 states and 48 transitions. [2019-10-22 08:56:16,548 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-22 08:56:16,548 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 48 transitions. [2019-10-22 08:56:16,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-10-22 08:56:16,549 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:56:16,549 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:56:16,549 INFO L410 AbstractCegarLoop]: === Iteration 8 === [fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr2REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION]=== [2019-10-22 08:56:16,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:56:16,550 INFO L82 PathProgramCache]: Analyzing trace with hash -661735506, now seen corresponding path program 1 times [2019-10-22 08:56:16,550 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:56:16,550 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17764187] [2019-10-22 08:56:16,550 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:16,550 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:16,550 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:56:16,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:16,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:16,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:16,710 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:56:16,711 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17764187] [2019-10-22 08:56:16,711 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710340356] [2019-10-22 08:56:16,711 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c1f7012d-27e5-4027-98be-6133441b9503/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 [2019-10-22 08:56:16,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:16,753 INFO L256 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-22 08:56:16,755 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:56:16,848 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:56:16,848 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 08:56:16,848 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2019-10-22 08:56:16,848 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058148134] [2019-10-22 08:56:16,849 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-22 08:56:16,849 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:56:16,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-22 08:56:16,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2019-10-22 08:56:16,849 INFO L87 Difference]: Start difference. First operand 45 states and 48 transitions. Second operand 13 states. [2019-10-22 08:56:17,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:56:17,162 INFO L93 Difference]: Finished difference Result 57 states and 60 transitions. [2019-10-22 08:56:17,162 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-22 08:56:17,163 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 30 [2019-10-22 08:56:17,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:56:17,163 INFO L225 Difference]: With dead ends: 57 [2019-10-22 08:56:17,163 INFO L226 Difference]: Without dead ends: 54 [2019-10-22 08:56:17,164 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2019-10-22 08:56:17,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-10-22 08:56:17,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2019-10-22 08:56:17,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-10-22 08:56:17,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 53 transitions. [2019-10-22 08:56:17,167 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 53 transitions. Word has length 30 [2019-10-22 08:56:17,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:56:17,168 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 53 transitions. [2019-10-22 08:56:17,168 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-22 08:56:17,168 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 53 transitions. [2019-10-22 08:56:17,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-10-22 08:56:17,168 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:56:17,169 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:56:17,369 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 08:56:17,370 INFO L410 AbstractCegarLoop]: === Iteration 9 === [fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr2REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION]=== [2019-10-22 08:56:17,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:56:17,370 INFO L82 PathProgramCache]: Analyzing trace with hash 1228723375, now seen corresponding path program 2 times [2019-10-22 08:56:17,370 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:56:17,370 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372492793] [2019-10-22 08:56:17,370 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:17,370 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:17,371 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:56:17,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:17,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:17,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:17,589 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:56:17,589 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372492793] [2019-10-22 08:56:17,589 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657911398] [2019-10-22 08:56:17,590 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c1f7012d-27e5-4027-98be-6133441b9503/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 [2019-10-22 08:56:17,625 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2019-10-22 08:56:17,625 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 08:56:17,626 INFO L256 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-22 08:56:17,628 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:56:17,660 INFO L392 ElimStorePlain]: Different costs {0=[|v_#length_12|], 1=[|v_#valid_24|]} [2019-10-22 08:56:17,669 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-22 08:56:17,677 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2019-10-22 08:56:17,678 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-22 08:56:17,692 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-22 08:56:17,694 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-22 08:56:17,700 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2019-10-22 08:56:17,701 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-10-22 08:56:17,706 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-22 08:56:17,706 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-10-22 08:56:17,707 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:24, output treesize:17 [2019-10-22 08:56:17,836 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-22 08:56:17,836 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-22 08:56:17,836 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9] total 12 [2019-10-22 08:56:17,836 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858183938] [2019-10-22 08:56:17,837 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-22 08:56:17,837 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:56:17,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-22 08:56:17,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2019-10-22 08:56:17,839 INFO L87 Difference]: Start difference. First operand 50 states and 53 transitions. Second operand 5 states. [2019-10-22 08:56:17,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:56:17,875 INFO L93 Difference]: Finished difference Result 48 states and 51 transitions. [2019-10-22 08:56:17,876 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-22 08:56:17,876 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 35 [2019-10-22 08:56:17,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:56:17,876 INFO L225 Difference]: With dead ends: 48 [2019-10-22 08:56:17,876 INFO L226 Difference]: Without dead ends: 48 [2019-10-22 08:56:17,877 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2019-10-22 08:56:17,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2019-10-22 08:56:17,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2019-10-22 08:56:17,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-10-22 08:56:17,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 51 transitions. [2019-10-22 08:56:17,881 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 51 transitions. Word has length 35 [2019-10-22 08:56:17,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:56:17,882 INFO L462 AbstractCegarLoop]: Abstraction has 48 states and 51 transitions. [2019-10-22 08:56:17,882 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-22 08:56:17,882 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 51 transitions. [2019-10-22 08:56:17,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-10-22 08:56:17,882 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:56:17,882 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:56:18,083 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 08:56:18,083 INFO L410 AbstractCegarLoop]: === Iteration 10 === [fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr2REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION]=== [2019-10-22 08:56:18,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:56:18,084 INFO L82 PathProgramCache]: Analyzing trace with hash -1738652280, now seen corresponding path program 1 times [2019-10-22 08:56:18,084 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:56:18,084 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211421145] [2019-10-22 08:56:18,084 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:18,084 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:18,084 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:56:18,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:18,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:18,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:18,150 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-22 08:56:18,151 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211421145] [2019-10-22 08:56:18,151 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643276096] [2019-10-22 08:56:18,151 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c1f7012d-27e5-4027-98be-6133441b9503/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 [2019-10-22 08:56:18,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:18,191 INFO L256 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-22 08:56:18,192 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:56:18,284 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:56:18,285 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 08:56:18,285 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 8] total 11 [2019-10-22 08:56:18,285 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529756416] [2019-10-22 08:56:18,285 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-22 08:56:18,285 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:56:18,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-22 08:56:18,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2019-10-22 08:56:18,286 INFO L87 Difference]: Start difference. First operand 48 states and 51 transitions. Second operand 11 states. [2019-10-22 08:56:18,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:56:18,520 INFO L93 Difference]: Finished difference Result 84 states and 89 transitions. [2019-10-22 08:56:18,520 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-22 08:56:18,520 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 44 [2019-10-22 08:56:18,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:56:18,521 INFO L225 Difference]: With dead ends: 84 [2019-10-22 08:56:18,521 INFO L226 Difference]: Without dead ends: 81 [2019-10-22 08:56:18,522 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2019-10-22 08:56:18,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2019-10-22 08:56:18,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 63. [2019-10-22 08:56:18,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2019-10-22 08:56:18,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 68 transitions. [2019-10-22 08:56:18,526 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 68 transitions. Word has length 44 [2019-10-22 08:56:18,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:56:18,527 INFO L462 AbstractCegarLoop]: Abstraction has 63 states and 68 transitions. [2019-10-22 08:56:18,527 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-22 08:56:18,527 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 68 transitions. [2019-10-22 08:56:18,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2019-10-22 08:56:18,529 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:56:18,529 INFO L380 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:56:18,730 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 08:56:18,730 INFO L410 AbstractCegarLoop]: === Iteration 11 === [fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr2REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION]=== [2019-10-22 08:56:18,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:56:18,730 INFO L82 PathProgramCache]: Analyzing trace with hash -950238676, now seen corresponding path program 2 times [2019-10-22 08:56:18,730 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:56:18,730 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231220883] [2019-10-22 08:56:18,730 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:18,731 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:18,731 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:56:18,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:18,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:18,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:18,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:18,814 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 250 trivial. 0 not checked. [2019-10-22 08:56:18,814 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231220883] [2019-10-22 08:56:18,814 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706657815] [2019-10-22 08:56:18,814 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c1f7012d-27e5-4027-98be-6133441b9503/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 [2019-10-22 08:56:18,851 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2019-10-22 08:56:18,851 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 08:56:18,852 INFO L256 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-22 08:56:18,854 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:56:18,906 INFO L341 Elim1Store]: treesize reduction 14, result has 50.0 percent of original size [2019-10-22 08:56:18,907 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 29 [2019-10-22 08:56:18,907 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-22 08:56:18,914 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-22 08:56:18,915 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-10-22 08:56:18,915 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:23, output treesize:15 [2019-10-22 08:56:18,996 INFO L341 Elim1Store]: treesize reduction 14, result has 50.0 percent of original size [2019-10-22 08:56:18,996 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 29 [2019-10-22 08:56:18,997 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-22 08:56:19,002 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-22 08:56:19,002 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-10-22 08:56:19,003 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:23, output treesize:15 [2019-10-22 08:56:19,094 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 258 trivial. 0 not checked. [2019-10-22 08:56:19,094 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-22 08:56:19,094 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 10 [2019-10-22 08:56:19,094 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886555960] [2019-10-22 08:56:19,095 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-22 08:56:19,095 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:56:19,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-22 08:56:19,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2019-10-22 08:56:19,095 INFO L87 Difference]: Start difference. First operand 63 states and 68 transitions. Second operand 6 states. [2019-10-22 08:56:19,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:56:19,170 INFO L93 Difference]: Finished difference Result 62 states and 67 transitions. [2019-10-22 08:56:19,170 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-22 08:56:19,170 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 85 [2019-10-22 08:56:19,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:56:19,171 INFO L225 Difference]: With dead ends: 62 [2019-10-22 08:56:19,171 INFO L226 Difference]: Without dead ends: 0 [2019-10-22 08:56:19,171 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 84 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2019-10-22 08:56:19,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-10-22 08:56:19,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-10-22 08:56:19,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-10-22 08:56:19,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-10-22 08:56:19,172 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 85 [2019-10-22 08:56:19,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:56:19,172 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-10-22 08:56:19,173 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-22 08:56:19,173 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-10-22 08:56:19,173 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-10-22 08:56:19,373 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 08:56:19,377 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.10 08:56:19 BoogieIcfgContainer [2019-10-22 08:56:19,377 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-10-22 08:56:19,377 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-10-22 08:56:19,377 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-10-22 08:56:19,378 INFO L275 PluginConnector]: Witness Printer initialized [2019-10-22 08:56:19,378 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 08:56:14" (3/4) ... [2019-10-22 08:56:19,382 INFO L137 WitnessPrinter]: Generating witness for correct program [2019-10-22 08:56:19,388 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2019-10-22 08:56:19,388 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure foo [2019-10-22 08:56:19,388 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2019-10-22 08:56:19,393 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 17 nodes and edges [2019-10-22 08:56:19,395 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2019-10-22 08:56:19,395 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2019-10-22 08:56:19,396 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2019-10-22 08:56:19,430 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_c1f7012d-27e5-4027-98be-6133441b9503/bin/uautomizer/witness.graphml [2019-10-22 08:56:19,430 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-10-22 08:56:19,431 INFO L168 Benchmark]: Toolchain (without parser) took 5819.05 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 185.6 MB). Free memory was 941.8 MB in the beginning and 864.9 MB in the end (delta: 76.9 MB). Peak memory consumption was 262.5 MB. Max. memory is 11.5 GB. [2019-10-22 08:56:19,431 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 1.0 GB. Free memory is still 966.0 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 08:56:19,432 INFO L168 Benchmark]: CACSL2BoogieTranslator took 242.24 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 107.5 MB). Free memory was 941.8 MB in the beginning and 1.1 GB in the end (delta: -159.9 MB). Peak memory consumption was 20.8 MB. Max. memory is 11.5 GB. [2019-10-22 08:56:19,432 INFO L168 Benchmark]: Boogie Preprocessor took 28.84 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: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 11.5 GB. [2019-10-22 08:56:19,432 INFO L168 Benchmark]: RCFGBuilder took 364.40 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: 23.7 MB). Peak memory consumption was 23.7 MB. Max. memory is 11.5 GB. [2019-10-22 08:56:19,433 INFO L168 Benchmark]: TraceAbstraction took 5127.16 ms. Allocated memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: 78.1 MB). Free memory was 1.1 GB in the beginning and 872.5 MB in the end (delta: 202.1 MB). Peak memory consumption was 280.2 MB. Max. memory is 11.5 GB. [2019-10-22 08:56:19,433 INFO L168 Benchmark]: Witness Printer took 52.80 ms. Allocated memory is still 1.2 GB. Free memory was 872.5 MB in the beginning and 864.9 MB in the end (delta: 7.6 MB). Peak memory consumption was 7.6 MB. Max. memory is 11.5 GB. [2019-10-22 08:56:19,435 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 1.0 GB. Free memory is still 966.0 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 242.24 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 107.5 MB). Free memory was 941.8 MB in the beginning and 1.1 GB in the end (delta: -159.9 MB). Peak memory consumption was 20.8 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 28.84 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: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 364.40 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: 23.7 MB). Peak memory consumption was 23.7 MB. Max. memory is 11.5 GB. * TraceAbstraction took 5127.16 ms. Allocated memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: 78.1 MB). Free memory was 1.1 GB in the beginning and 872.5 MB in the end (delta: 202.1 MB). Peak memory consumption was 280.2 MB. Max. memory is 11.5 GB. * Witness Printer took 52.80 ms. Allocated memory is still 1.2 GB. Free memory was 872.5 MB in the beginning and 864.9 MB in the end (delta: 7.6 MB). Peak memory consumption was 7.6 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 16]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 16]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 16]: array index is always in bounds For all program executions holds that array index is always in bounds at this location - PositiveResult [Line: 30]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 21]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 30]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 27]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 27]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - AllSpecificationsHoldResult: All specifications hold 8 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 40 locations, 8 error locations. Result: SAFE, OverallTime: 5.0s, OverallIterations: 11, TraceHistogramMax: 10, AutomataDifference: 1.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 277 SDtfs, 501 SDslu, 675 SDs, 0 SdLazy, 860 SolverSat, 94 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 318 GetRequests, 220 SyntacticMatches, 4 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 1.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=63occurred in iteration=10, 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, 11 MinimizatonAttempts, 51 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.6s InterpolantComputationTime, 510 NumberOfCodeBlocks, 418 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 494 ConstructedInterpolants, 90 QuantifiedInterpolants, 182724 SizeOfPredicates, 5 NumberOfNonLiveVariables, 461 ConjunctsInSsa, 36 ConjunctsInUnsatCore, 16 InterpolantComputations, 8 PerfectInterpolantSequences, 596/712 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...