./Ultimate.py --spec ../../sv-benchmarks/c/MemSafety.prp --file ../../sv-benchmarks/c/memsafety-ext3/freeAlloca_false-valid-free.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 1dbac8bc Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_e153d88e-3b57-4d3c-83e5-e31087bae2d9/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_e153d88e-3b57-4d3c-83e5-e31087bae2d9/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_e153d88e-3b57-4d3c-83e5-e31087bae2d9/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_e153d88e-3b57-4d3c-83e5-e31087bae2d9/bin-2019/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-ext3/freeAlloca_false-valid-free.c -s /tmp/vcloud-vcloud-master/worker/working_dir_e153d88e-3b57-4d3c-83e5-e31087bae2d9/bin-2019/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_e153d88e-3b57-4d3c-83e5-e31087bae2d9/bin-2019/utaipan --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 2749915c63b6e758ac6033a38fbdad80769d2869 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-1dbac8b [2018-10-27 04:46:46,098 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-27 04:46:46,099 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-27 04:46:46,108 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-27 04:46:46,108 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-27 04:46:46,109 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-27 04:46:46,110 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-27 04:46:46,112 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-27 04:46:46,113 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-27 04:46:46,114 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-27 04:46:46,114 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-27 04:46:46,115 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-27 04:46:46,116 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-27 04:46:46,117 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-27 04:46:46,118 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-27 04:46:46,118 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-27 04:46:46,119 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-27 04:46:46,121 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-27 04:46:46,122 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-27 04:46:46,123 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-27 04:46:46,124 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-27 04:46:46,125 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-27 04:46:46,127 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-27 04:46:46,127 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-27 04:46:46,128 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-27 04:46:46,128 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-27 04:46:46,129 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-27 04:46:46,130 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-27 04:46:46,130 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-27 04:46:46,132 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-27 04:46:46,132 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-27 04:46:46,132 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-10-27 04:46:46,133 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-27 04:46:46,133 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-27 04:46:46,134 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-27 04:46:46,134 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-27 04:46:46,134 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_e153d88e-3b57-4d3c-83e5-e31087bae2d9/bin-2019/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2018-10-27 04:46:46,146 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-27 04:46:46,146 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-27 04:46:46,147 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-27 04:46:46,147 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-27 04:46:46,147 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-27 04:46:46,147 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-27 04:46:46,148 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-27 04:46:46,148 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-27 04:46:46,148 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-27 04:46:46,148 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-27 04:46:46,148 INFO L133 SettingsManager]: * Interval Domain=false [2018-10-27 04:46:46,149 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-27 04:46:46,149 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-27 04:46:46,149 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-27 04:46:46,149 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-27 04:46:46,149 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-10-27 04:46:46,149 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-27 04:46:46,149 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-27 04:46:46,150 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-27 04:46:46,150 INFO L133 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2018-10-27 04:46:46,150 INFO L133 SettingsManager]: * Bitprecise bitfields=true [2018-10-27 04:46:46,150 INFO L133 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2018-10-27 04:46:46,150 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-27 04:46:46,150 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-27 04:46:46,150 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-27 04:46:46,150 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-27 04:46:46,151 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-27 04:46:46,151 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-27 04:46:46,151 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-27 04:46:46,153 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-27 04:46:46,153 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-27 04:46:46,154 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-27 04:46:46,154 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-27 04:46:46,154 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-27 04:46:46,154 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_e153d88e-3b57-4d3c-83e5-e31087bae2d9/bin-2019/utaipan 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 -> Taipan 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 -> 2749915c63b6e758ac6033a38fbdad80769d2869 [2018-10-27 04:46:46,180 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-27 04:46:46,192 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-27 04:46:46,197 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-27 04:46:46,198 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-27 04:46:46,198 INFO L276 PluginConnector]: CDTParser initialized [2018-10-27 04:46:46,199 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_e153d88e-3b57-4d3c-83e5-e31087bae2d9/bin-2019/utaipan/../../sv-benchmarks/c/memsafety-ext3/freeAlloca_false-valid-free.c [2018-10-27 04:46:46,241 INFO L218 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_e153d88e-3b57-4d3c-83e5-e31087bae2d9/bin-2019/utaipan/data/d5bf7d9e8/ed32182c89364b3983d79994a9b4a625/FLAGb6cd84b87 [2018-10-27 04:46:46,617 INFO L298 CDTParser]: Found 1 translation units. [2018-10-27 04:46:46,617 INFO L158 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_e153d88e-3b57-4d3c-83e5-e31087bae2d9/sv-benchmarks/c/memsafety-ext3/freeAlloca_false-valid-free.c [2018-10-27 04:46:46,621 INFO L346 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_e153d88e-3b57-4d3c-83e5-e31087bae2d9/bin-2019/utaipan/data/d5bf7d9e8/ed32182c89364b3983d79994a9b4a625/FLAGb6cd84b87 [2018-10-27 04:46:46,633 INFO L354 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_e153d88e-3b57-4d3c-83e5-e31087bae2d9/bin-2019/utaipan/data/d5bf7d9e8/ed32182c89364b3983d79994a9b4a625 [2018-10-27 04:46:46,635 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-27 04:46:46,636 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-10-27 04:46:46,637 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-27 04:46:46,637 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-27 04:46:46,641 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-27 04:46:46,641 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 04:46:46" (1/1) ... [2018-10-27 04:46:46,643 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c279a72 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:46:46, skipping insertion in model container [2018-10-27 04:46:46,644 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 04:46:46" (1/1) ... [2018-10-27 04:46:46,651 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-27 04:46:46,669 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-27 04:46:46,774 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-27 04:46:46,782 INFO L189 MainTranslator]: Completed pre-run [2018-10-27 04:46:46,792 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-27 04:46:46,804 INFO L193 MainTranslator]: Completed translation [2018-10-27 04:46:46,805 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:46:46 WrapperNode [2018-10-27 04:46:46,805 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-27 04:46:46,806 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-27 04:46:46,806 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-27 04:46:46,806 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-27 04:46:46,814 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:46:46" (1/1) ... [2018-10-27 04:46:46,821 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:46:46" (1/1) ... [2018-10-27 04:46:46,834 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-27 04:46:46,834 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-27 04:46:46,834 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-27 04:46:46,834 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-27 04:46:46,842 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:46:46" (1/1) ... [2018-10-27 04:46:46,842 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:46:46" (1/1) ... [2018-10-27 04:46:46,843 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:46:46" (1/1) ... [2018-10-27 04:46:46,843 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:46:46" (1/1) ... [2018-10-27 04:46:46,847 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:46:46" (1/1) ... [2018-10-27 04:46:46,850 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:46:46" (1/1) ... [2018-10-27 04:46:46,851 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:46:46" (1/1) ... [2018-10-27 04:46:46,853 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-27 04:46:46,853 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-27 04:46:46,853 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-27 04:46:46,853 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-27 04:46:46,854 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:46:46" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e153d88e-3b57-4d3c-83e5-e31087bae2d9/bin-2019/utaipan/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 [2018-10-27 04:46:46,966 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-27 04:46:46,966 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-27 04:46:46,966 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-27 04:46:46,966 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-27 04:46:46,966 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-27 04:46:46,966 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-27 04:46:47,365 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-27 04:46:47,365 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 04:46:47 BoogieIcfgContainer [2018-10-27 04:46:47,365 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-27 04:46:47,366 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-27 04:46:47,366 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-27 04:46:47,369 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-27 04:46:47,369 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 04:46:46" (1/3) ... [2018-10-27 04:46:47,370 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e8309bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 04:46:47, skipping insertion in model container [2018-10-27 04:46:47,370 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:46:46" (2/3) ... [2018-10-27 04:46:47,371 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e8309bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 04:46:47, skipping insertion in model container [2018-10-27 04:46:47,371 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 04:46:47" (3/3) ... [2018-10-27 04:46:47,372 INFO L112 eAbstractionObserver]: Analyzing ICFG freeAlloca_false-valid-free.c [2018-10-27 04:46:47,381 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-27 04:46:47,388 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 7 error locations. [2018-10-27 04:46:47,404 INFO L257 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2018-10-27 04:46:47,427 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-27 04:46:47,427 INFO L383 AbstractCegarLoop]: Hoare is false [2018-10-27 04:46:47,427 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-27 04:46:47,427 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-27 04:46:47,427 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-27 04:46:47,427 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-27 04:46:47,427 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-27 04:46:47,428 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-27 04:46:47,440 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2018-10-27 04:46:47,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-10-27 04:46:47,452 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 04:46:47,453 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 04:46:47,456 INFO L424 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, mainErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, mainErr6ENSURES_VIOLATIONMEMORY_LEAK, mainErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE]=== [2018-10-27 04:46:47,463 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 04:46:47,463 INFO L82 PathProgramCache]: Analyzing trace with hash -935793955, now seen corresponding path program 1 times [2018-10-27 04:46:47,465 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 04:46:47,508 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 04:46:47,508 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 04:46:47,508 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 04:46:47,508 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 04:46:47,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 04:46:47,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 04:46:47,590 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 04:46:47,590 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-27 04:46:47,590 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 04:46:47,595 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-10-27 04:46:47,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-10-27 04:46:47,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-27 04:46:47,609 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 2 states. [2018-10-27 04:46:47,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 04:46:47,631 INFO L93 Difference]: Finished difference Result 29 states and 30 transitions. [2018-10-27 04:46:47,631 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-10-27 04:46:47,632 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 9 [2018-10-27 04:46:47,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 04:46:47,641 INFO L225 Difference]: With dead ends: 29 [2018-10-27 04:46:47,641 INFO L226 Difference]: Without dead ends: 26 [2018-10-27 04:46:47,644 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-27 04:46:47,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-10-27 04:46:47,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-10-27 04:46:47,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-27 04:46:47,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2018-10-27 04:46:47,672 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 9 [2018-10-27 04:46:47,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 04:46:47,672 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2018-10-27 04:46:47,673 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-10-27 04:46:47,673 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2018-10-27 04:46:47,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-10-27 04:46:47,673 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 04:46:47,674 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 04:46:47,674 INFO L424 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, mainErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, mainErr6ENSURES_VIOLATIONMEMORY_LEAK, mainErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE]=== [2018-10-27 04:46:47,674 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 04:46:47,674 INFO L82 PathProgramCache]: Analyzing trace with hash -935806768, now seen corresponding path program 1 times [2018-10-27 04:46:47,674 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 04:46:47,675 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 04:46:47,675 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 04:46:47,676 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 04:46:47,676 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 04:46:47,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 04:46:47,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 04:46:47,758 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 04:46:47,758 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-27 04:46:47,758 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 04:46:47,760 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-27 04:46:47,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-27 04:46:47,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-10-27 04:46:47,760 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 4 states. [2018-10-27 04:46:47,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 04:46:47,932 INFO L93 Difference]: Finished difference Result 37 states and 40 transitions. [2018-10-27 04:46:47,932 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-27 04:46:47,932 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2018-10-27 04:46:47,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 04:46:47,933 INFO L225 Difference]: With dead ends: 37 [2018-10-27 04:46:47,933 INFO L226 Difference]: Without dead ends: 37 [2018-10-27 04:46:47,934 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-10-27 04:46:47,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-10-27 04:46:47,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 24. [2018-10-27 04:46:47,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-27 04:46:47,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2018-10-27 04:46:47,936 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 9 [2018-10-27 04:46:47,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 04:46:47,937 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2018-10-27 04:46:47,937 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-27 04:46:47,937 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2018-10-27 04:46:47,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-10-27 04:46:47,937 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 04:46:47,937 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 04:46:47,938 INFO L424 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, mainErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, mainErr6ENSURES_VIOLATIONMEMORY_LEAK, mainErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE]=== [2018-10-27 04:46:47,938 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 04:46:47,938 INFO L82 PathProgramCache]: Analyzing trace with hash 1054759646, now seen corresponding path program 1 times [2018-10-27 04:46:47,938 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 04:46:47,939 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 04:46:47,939 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 04:46:47,939 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 04:46:47,939 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 04:46:47,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 04:46:47,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 04:46:47,980 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 04:46:47,980 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-27 04:46:47,980 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 04:46:47,981 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-27 04:46:47,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-27 04:46:47,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-27 04:46:47,981 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 3 states. [2018-10-27 04:46:48,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 04:46:48,038 INFO L93 Difference]: Finished difference Result 30 states and 31 transitions. [2018-10-27 04:46:48,039 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-27 04:46:48,039 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2018-10-27 04:46:48,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 04:46:48,039 INFO L225 Difference]: With dead ends: 30 [2018-10-27 04:46:48,040 INFO L226 Difference]: Without dead ends: 30 [2018-10-27 04:46:48,040 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-27 04:46:48,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-10-27 04:46:48,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 26. [2018-10-27 04:46:48,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-27 04:46:48,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2018-10-27 04:46:48,043 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 10 [2018-10-27 04:46:48,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 04:46:48,044 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2018-10-27 04:46:48,044 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-27 04:46:48,044 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2018-10-27 04:46:48,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-10-27 04:46:48,044 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 04:46:48,044 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 04:46:48,045 INFO L424 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, mainErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, mainErr6ENSURES_VIOLATIONMEMORY_LEAK, mainErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE]=== [2018-10-27 04:46:48,045 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 04:46:48,045 INFO L82 PathProgramCache]: Analyzing trace with hash 1054761312, now seen corresponding path program 1 times [2018-10-27 04:46:48,045 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 04:46:48,046 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 04:46:48,046 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 04:46:48,046 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 04:46:48,046 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 04:46:48,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 04:46:48,168 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 04:46:48,169 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 04:46:48,169 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-27 04:46:48,169 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 04:46:48,169 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-27 04:46:48,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-27 04:46:48,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-10-27 04:46:48,170 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 4 states. [2018-10-27 04:46:48,301 WARN L179 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2018-10-27 04:46:48,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 04:46:48,348 INFO L93 Difference]: Finished difference Result 43 states and 45 transitions. [2018-10-27 04:46:48,349 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-27 04:46:48,349 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2018-10-27 04:46:48,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 04:46:48,350 INFO L225 Difference]: With dead ends: 43 [2018-10-27 04:46:48,350 INFO L226 Difference]: Without dead ends: 43 [2018-10-27 04:46:48,351 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-10-27 04:46:48,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-27 04:46:48,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 28. [2018-10-27 04:46:48,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-27 04:46:48,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2018-10-27 04:46:48,354 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 10 [2018-10-27 04:46:48,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 04:46:48,354 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2018-10-27 04:46:48,354 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-27 04:46:48,355 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2018-10-27 04:46:48,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-27 04:46:48,355 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 04:46:48,355 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 04:46:48,356 INFO L424 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, mainErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, mainErr6ENSURES_VIOLATIONMEMORY_LEAK, mainErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE]=== [2018-10-27 04:46:48,356 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 04:46:48,356 INFO L82 PathProgramCache]: Analyzing trace with hash -2003144521, now seen corresponding path program 1 times [2018-10-27 04:46:48,356 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 04:46:48,357 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 04:46:48,357 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 04:46:48,357 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 04:46:48,357 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 04:46:48,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 04:46:48,391 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-10-27 04:46:48,391 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 04:46:48,391 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-27 04:46:48,392 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 04:46:48,392 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-27 04:46:48,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-27 04:46:48,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-10-27 04:46:48,392 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand 4 states. [2018-10-27 04:46:48,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 04:46:48,427 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2018-10-27 04:46:48,427 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-27 04:46:48,427 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2018-10-27 04:46:48,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 04:46:48,428 INFO L225 Difference]: With dead ends: 28 [2018-10-27 04:46:48,428 INFO L226 Difference]: Without dead ends: 28 [2018-10-27 04:46:48,428 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-10-27 04:46:48,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-10-27 04:46:48,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2018-10-27 04:46:48,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-10-27 04:46:48,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2018-10-27 04:46:48,430 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 15 [2018-10-27 04:46:48,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 04:46:48,430 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2018-10-27 04:46:48,431 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-27 04:46:48,431 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2018-10-27 04:46:48,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-27 04:46:48,432 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 04:46:48,432 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 04:46:48,432 INFO L424 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, mainErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, mainErr6ENSURES_VIOLATIONMEMORY_LEAK, mainErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE]=== [2018-10-27 04:46:48,432 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 04:46:48,432 INFO L82 PathProgramCache]: Analyzing trace with hash -2003142855, now seen corresponding path program 1 times [2018-10-27 04:46:48,433 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 04:46:48,433 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 04:46:48,433 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 04:46:48,434 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 04:46:48,434 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 04:46:48,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 04:46:48,633 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 04:46:48,634 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 04:46:48,634 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 04:46:48,634 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 16 with the following transitions: [2018-10-27 04:46:48,635 INFO L202 CegarAbsIntRunner]: [0], [1], [5], [9], [14], [16], [17], [18], [20], [42], [43], [44] [2018-10-27 04:46:48,678 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-27 04:46:48,679 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 04:46:49,267 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-27 04:46:49,268 INFO L272 AbstractInterpreter]: Visited 12 different actions 60 times. Merged at 6 different actions 48 times. Widened at 1 different actions 4 times. Found 1 fixpoints after 1 different actions. Largest state had 27 variables. [2018-10-27 04:46:49,278 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 04:46:49,279 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-27 04:46:49,279 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 04:46:49,279 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e153d88e-3b57-4d3c-83e5-e31087bae2d9/bin-2019/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-27 04:46:49,286 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 04:46:49,286 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 04:46:49,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 04:46:49,314 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 04:46:49,353 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2018-10-27 04:46:49,354 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-10-27 04:46:49,361 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-27 04:46:49,361 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:16, output treesize:12 [2018-10-27 04:46:49,452 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 04:46:49,453 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 04:46:49,884 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 04:46:49,908 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-27 04:46:49,908 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 12 [2018-10-27 04:46:49,908 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-27 04:46:49,909 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-27 04:46:49,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-27 04:46:49,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2018-10-27 04:46:49,910 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 10 states. [2018-10-27 04:46:50,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 04:46:50,339 INFO L93 Difference]: Finished difference Result 43 states and 45 transitions. [2018-10-27 04:46:50,340 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-27 04:46:50,340 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 15 [2018-10-27 04:46:50,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 04:46:50,341 INFO L225 Difference]: With dead ends: 43 [2018-10-27 04:46:50,341 INFO L226 Difference]: Without dead ends: 43 [2018-10-27 04:46:50,341 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2018-10-27 04:46:50,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-27 04:46:50,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 28. [2018-10-27 04:46:50,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-27 04:46:50,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2018-10-27 04:46:50,344 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 15 [2018-10-27 04:46:50,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 04:46:50,345 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2018-10-27 04:46:50,345 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-27 04:46:50,345 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2018-10-27 04:46:50,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-27 04:46:50,345 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 04:46:50,345 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 04:46:50,346 INFO L424 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, mainErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, mainErr6ENSURES_VIOLATIONMEMORY_LEAK, mainErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE]=== [2018-10-27 04:46:50,346 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 04:46:50,346 INFO L82 PathProgramCache]: Analyzing trace with hash 1366570364, now seen corresponding path program 1 times [2018-10-27 04:46:50,346 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 04:46:50,347 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 04:46:50,347 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 04:46:50,347 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 04:46:50,347 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 04:46:50,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 04:46:50,423 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 04:46:50,424 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 04:46:50,424 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 04:46:50,424 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 22 with the following transitions: [2018-10-27 04:46:50,424 INFO L202 CegarAbsIntRunner]: [0], [1], [5], [9], [12], [14], [16], [18], [20], [24], [26], [27], [42], [43], [44] [2018-10-27 04:46:50,425 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-27 04:46:50,425 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 04:46:50,747 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-27 04:46:50,747 INFO L272 AbstractInterpreter]: Visited 15 different actions 69 times. Merged at 5 different actions 45 times. Widened at 1 different actions 5 times. Found 1 fixpoints after 1 different actions. Largest state had 30 variables. [2018-10-27 04:46:50,787 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 04:46:50,787 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-27 04:46:50,787 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 04:46:50,787 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e153d88e-3b57-4d3c-83e5-e31087bae2d9/bin-2019/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-27 04:46:50,796 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 04:46:50,797 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 04:46:50,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 04:46:50,833 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 04:46:50,926 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 04:46:50,927 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 04:46:50,962 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 04:46:50,979 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-27 04:46:50,979 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2018-10-27 04:46:50,979 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-27 04:46:50,979 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-27 04:46:50,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-27 04:46:50,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-27 04:46:50,980 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand 6 states. [2018-10-27 04:46:51,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 04:46:51,056 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2018-10-27 04:46:51,057 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-27 04:46:51,057 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2018-10-27 04:46:51,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 04:46:51,058 INFO L225 Difference]: With dead ends: 36 [2018-10-27 04:46:51,058 INFO L226 Difference]: Without dead ends: 36 [2018-10-27 04:46:51,058 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-27 04:46:51,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-10-27 04:46:51,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2018-10-27 04:46:51,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-10-27 04:46:51,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2018-10-27 04:46:51,061 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 21 [2018-10-27 04:46:51,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 04:46:51,061 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2018-10-27 04:46:51,062 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-27 04:46:51,062 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2018-10-27 04:46:51,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-10-27 04:46:51,062 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 04:46:51,062 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 04:46:51,063 INFO L424 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, mainErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, mainErr6ENSURES_VIOLATIONMEMORY_LEAK, mainErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE]=== [2018-10-27 04:46:51,063 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 04:46:51,066 INFO L82 PathProgramCache]: Analyzing trace with hash -228708861, now seen corresponding path program 2 times [2018-10-27 04:46:51,066 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 04:46:51,067 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 04:46:51,067 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 04:46:51,067 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 04:46:51,067 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 04:46:51,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 04:46:51,159 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 04:46:51,159 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 04:46:51,159 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 04:46:51,160 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-27 04:46:51,160 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-27 04:46:51,160 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 04:46:51,160 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e153d88e-3b57-4d3c-83e5-e31087bae2d9/bin-2019/utaipan/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-27 04:46:51,171 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-27 04:46:51,171 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-10-27 04:46:51,185 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2018-10-27 04:46:51,185 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-27 04:46:51,187 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 04:46:51,192 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2018-10-27 04:46:51,192 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-10-27 04:46:51,198 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-27 04:46:51,198 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2018-10-27 04:46:51,217 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-10-27 04:46:51,217 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 04:46:51,261 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-10-27 04:46:51,277 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-10-27 04:46:51,278 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 10 [2018-10-27 04:46:51,278 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 04:46:51,278 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-27 04:46:51,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-27 04:46:51,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2018-10-27 04:46:51,278 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 4 states. [2018-10-27 04:46:51,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 04:46:51,308 INFO L93 Difference]: Finished difference Result 32 states and 33 transitions. [2018-10-27 04:46:51,311 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-27 04:46:51,311 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 26 [2018-10-27 04:46:51,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 04:46:51,312 INFO L225 Difference]: With dead ends: 32 [2018-10-27 04:46:51,312 INFO L226 Difference]: Without dead ends: 32 [2018-10-27 04:46:51,312 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2018-10-27 04:46:51,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-10-27 04:46:51,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-10-27 04:46:51,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-27 04:46:51,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2018-10-27 04:46:51,314 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 26 [2018-10-27 04:46:51,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 04:46:51,314 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2018-10-27 04:46:51,314 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-27 04:46:51,314 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2018-10-27 04:46:51,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-10-27 04:46:51,315 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 04:46:51,315 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 04:46:51,315 INFO L424 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, mainErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, mainErr6ENSURES_VIOLATIONMEMORY_LEAK, mainErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE]=== [2018-10-27 04:46:51,315 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 04:46:51,316 INFO L82 PathProgramCache]: Analyzing trace with hash -1647479997, now seen corresponding path program 1 times [2018-10-27 04:46:51,316 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 04:46:51,316 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 04:46:51,316 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-27 04:46:51,316 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 04:46:51,317 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 04:46:51,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 04:46:51,385 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 04:46:51,385 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 04:46:51,385 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 04:46:51,385 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 30 with the following transitions: [2018-10-27 04:46:51,386 INFO L202 CegarAbsIntRunner]: [0], [1], [5], [9], [12], [14], [16], [18], [20], [24], [26], [28], [37], [39], [41], [42], [43], [44] [2018-10-27 04:46:51,387 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-27 04:46:51,387 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 04:46:51,692 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-27 04:46:51,692 INFO L272 AbstractInterpreter]: Visited 18 different actions 72 times. Merged at 5 different actions 45 times. Widened at 1 different actions 5 times. Found 1 fixpoints after 1 different actions. Largest state had 36 variables. [2018-10-27 04:46:51,703 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 04:46:51,703 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-27 04:46:51,703 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 04:46:51,703 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e153d88e-3b57-4d3c-83e5-e31087bae2d9/bin-2019/utaipan/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-27 04:46:51,710 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 04:46:51,710 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 04:46:51,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 04:46:51,745 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 04:46:51,833 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 04:46:51,834 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 04:46:51,978 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 04:46:52,011 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-27 04:46:52,011 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2018-10-27 04:46:52,012 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-27 04:46:52,012 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-27 04:46:52,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-27 04:46:52,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-27 04:46:52,012 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand 7 states. [2018-10-27 04:46:52,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 04:46:52,032 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2018-10-27 04:46:52,033 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-27 04:46:52,033 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 29 [2018-10-27 04:46:52,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 04:46:52,033 INFO L225 Difference]: With dead ends: 40 [2018-10-27 04:46:52,033 INFO L226 Difference]: Without dead ends: 40 [2018-10-27 04:46:52,034 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-27 04:46:52,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-10-27 04:46:52,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 37. [2018-10-27 04:46:52,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-10-27 04:46:52,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2018-10-27 04:46:52,036 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 29 [2018-10-27 04:46:52,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 04:46:52,037 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2018-10-27 04:46:52,037 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-27 04:46:52,037 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2018-10-27 04:46:52,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-10-27 04:46:52,037 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 04:46:52,037 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 04:46:52,038 INFO L424 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, mainErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, mainErr6ENSURES_VIOLATIONMEMORY_LEAK, mainErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE]=== [2018-10-27 04:46:52,038 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 04:46:52,038 INFO L82 PathProgramCache]: Analyzing trace with hash -1051331382, now seen corresponding path program 2 times [2018-10-27 04:46:52,038 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 04:46:52,039 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 04:46:52,042 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 04:46:52,042 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 04:46:52,042 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 04:46:52,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 04:46:52,101 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 04:46:52,101 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 04:46:52,101 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 04:46:52,101 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-27 04:46:52,101 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-27 04:46:52,102 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 04:46:52,102 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e153d88e-3b57-4d3c-83e5-e31087bae2d9/bin-2019/utaipan/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-27 04:46:52,109 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-27 04:46:52,110 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-10-27 04:46:52,143 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2018-10-27 04:46:52,143 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-27 04:46:52,146 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 04:46:52,391 WARN L854 $PredicateComparison]: unable to prove that (exists ((main_ULTIMATE.dealloc_~addr.base Int)) (and (= |c_#valid| (store |c_old(#valid)| main_ULTIMATE.dealloc_~addr.base 0)) (= 0 (select |c_old(#valid)| main_ULTIMATE.dealloc_~addr.base)))) is different from true [2018-10-27 04:46:52,394 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2018-10-27 04:46:52,394 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 04:46:52,419 WARN L832 $PredicateComparison]: unable to prove that (forall ((|v_main_#Ultimate.alloc_#res.base_6| Int)) (or (= (store |c_#valid| |v_main_#Ultimate.alloc_#res.base_6| 0) |c_old(#valid)|) (not (= (select |c_#valid| |v_main_#Ultimate.alloc_#res.base_6|) 0)))) is different from false [2018-10-27 04:46:52,427 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2018-10-27 04:46:52,452 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-10-27 04:46:52,452 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [7] total 12 [2018-10-27 04:46:52,452 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 04:46:52,452 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-27 04:46:52,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-27 04:46:52,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=64, Unknown=2, NotChecked=34, Total=132 [2018-10-27 04:46:52,452 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand 5 states. [2018-10-27 04:46:52,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 04:46:52,527 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2018-10-27 04:46:52,528 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-27 04:46:52,528 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 34 [2018-10-27 04:46:52,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 04:46:52,528 INFO L225 Difference]: With dead ends: 39 [2018-10-27 04:46:52,529 INFO L226 Difference]: Without dead ends: 37 [2018-10-27 04:46:52,529 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=35, Invalid=80, Unknown=3, NotChecked=38, Total=156 [2018-10-27 04:46:52,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-10-27 04:46:52,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-10-27 04:46:52,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-10-27 04:46:52,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2018-10-27 04:46:52,531 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 34 [2018-10-27 04:46:52,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 04:46:52,531 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2018-10-27 04:46:52,531 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-27 04:46:52,531 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2018-10-27 04:46:52,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-10-27 04:46:52,532 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 04:46:52,532 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 04:46:52,532 INFO L424 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, mainErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, mainErr6ENSURES_VIOLATIONMEMORY_LEAK, mainErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE]=== [2018-10-27 04:46:52,532 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 04:46:52,532 INFO L82 PathProgramCache]: Analyzing trace with hash -1017867930, now seen corresponding path program 1 times [2018-10-27 04:46:52,532 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 04:46:52,533 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 04:46:52,533 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-27 04:46:52,533 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 04:46:52,533 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 04:46:52,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 04:46:52,590 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 04:46:52,590 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 04:46:52,590 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 04:46:52,590 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 37 with the following transitions: [2018-10-27 04:46:52,591 INFO L202 CegarAbsIntRunner]: [0], [1], [5], [9], [12], [14], [16], [18], [20], [24], [26], [28], [31], [33], [35], [39], [41], [42], [43], [44] [2018-10-27 04:46:52,592 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-27 04:46:52,592 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 04:46:52,871 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-27 04:46:52,872 INFO L272 AbstractInterpreter]: Visited 20 different actions 74 times. Merged at 5 different actions 45 times. Widened at 1 different actions 5 times. Found 1 fixpoints after 1 different actions. Largest state had 36 variables. [2018-10-27 04:46:52,877 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 04:46:52,878 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-27 04:46:52,878 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 04:46:52,878 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e153d88e-3b57-4d3c-83e5-e31087bae2d9/bin-2019/utaipan/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-27 04:46:52,887 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 04:46:52,887 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 04:46:52,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 04:46:52,921 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 04:46:53,016 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 04:46:53,016 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 04:46:53,081 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 04:46:53,098 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-27 04:46:53,098 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2018-10-27 04:46:53,098 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-27 04:46:53,098 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-27 04:46:53,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-27 04:46:53,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-10-27 04:46:53,099 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 8 states. [2018-10-27 04:46:53,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 04:46:53,213 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2018-10-27 04:46:53,214 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-27 04:46:53,215 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 36 [2018-10-27 04:46:53,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 04:46:53,215 INFO L225 Difference]: With dead ends: 45 [2018-10-27 04:46:53,215 INFO L226 Difference]: Without dead ends: 45 [2018-10-27 04:46:53,215 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-10-27 04:46:53,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-27 04:46:53,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 42. [2018-10-27 04:46:53,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-10-27 04:46:53,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2018-10-27 04:46:53,217 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 36 [2018-10-27 04:46:53,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 04:46:53,218 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2018-10-27 04:46:53,218 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-27 04:46:53,218 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2018-10-27 04:46:53,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-10-27 04:46:53,218 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 04:46:53,219 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 04:46:53,219 INFO L424 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, mainErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, mainErr6ENSURES_VIOLATIONMEMORY_LEAK, mainErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE]=== [2018-10-27 04:46:53,222 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 04:46:53,222 INFO L82 PathProgramCache]: Analyzing trace with hash 1445435903, now seen corresponding path program 2 times [2018-10-27 04:46:53,222 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 04:46:53,222 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 04:46:53,222 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 04:46:53,223 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 04:46:53,223 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 04:46:53,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 04:46:53,302 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 04:46:53,303 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 04:46:53,303 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 04:46:53,303 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-27 04:46:53,303 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-27 04:46:53,303 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 04:46:53,303 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e153d88e-3b57-4d3c-83e5-e31087bae2d9/bin-2019/utaipan/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-27 04:46:53,310 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-27 04:46:53,310 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-10-27 04:46:53,323 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2018-10-27 04:46:53,323 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-27 04:46:53,325 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 04:46:53,403 WARN L854 $PredicateComparison]: unable to prove that (exists ((main_ULTIMATE.dealloc_~addr.base Int)) (and (= |c_#valid| (store |c_old(#valid)| main_ULTIMATE.dealloc_~addr.base 0)) (= 0 (select |c_old(#valid)| main_ULTIMATE.dealloc_~addr.base)))) is different from true [2018-10-27 04:46:53,406 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2018-10-27 04:46:53,406 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 04:46:53,445 WARN L832 $PredicateComparison]: unable to prove that (forall ((|v_main_#Ultimate.alloc_#res.base_8| Int)) (or (not (= 0 (select |c_#valid| |v_main_#Ultimate.alloc_#res.base_8|))) (= (store |c_#valid| |v_main_#Ultimate.alloc_#res.base_8| 0) |c_old(#valid)|))) is different from false [2018-10-27 04:46:53,449 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2018-10-27 04:46:53,466 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-10-27 04:46:53,466 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [8] total 15 [2018-10-27 04:46:53,466 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 04:46:53,466 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-27 04:46:53,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-27 04:46:53,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=116, Unknown=2, NotChecked=46, Total=210 [2018-10-27 04:46:53,467 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 6 states. [2018-10-27 04:46:53,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 04:46:53,501 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2018-10-27 04:46:53,501 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-27 04:46:53,501 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 41 [2018-10-27 04:46:53,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 04:46:53,502 INFO L225 Difference]: With dead ends: 41 [2018-10-27 04:46:53,502 INFO L226 Difference]: Without dead ends: 0 [2018-10-27 04:46:53,502 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=137, Unknown=3, NotChecked=50, Total=240 [2018-10-27 04:46:53,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-10-27 04:46:53,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-10-27 04:46:53,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-10-27 04:46:53,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-10-27 04:46:53,502 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 41 [2018-10-27 04:46:53,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 04:46:53,503 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-10-27 04:46:53,503 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-27 04:46:53,503 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-10-27 04:46:53,503 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-10-27 04:46:53,506 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.10 04:46:53 BoogieIcfgContainer [2018-10-27 04:46:53,506 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-27 04:46:53,507 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-10-27 04:46:53,507 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-10-27 04:46:53,507 INFO L276 PluginConnector]: Witness Printer initialized [2018-10-27 04:46:53,507 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 04:46:47" (3/4) ... [2018-10-27 04:46:53,511 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-10-27 04:46:53,517 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-10-27 04:46:53,517 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-10-27 04:46:53,522 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 26 nodes and edges [2018-10-27 04:46:53,522 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 14 nodes and edges [2018-10-27 04:46:53,522 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2018-10-27 04:46:53,522 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-10-27 04:46:53,553 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_e153d88e-3b57-4d3c-83e5-e31087bae2d9/bin-2019/utaipan/witness.graphml [2018-10-27 04:46:53,553 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-10-27 04:46:53,555 INFO L168 Benchmark]: Toolchain (without parser) took 6918.43 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 226.0 MB). Free memory was 961.8 MB in the beginning and 1.1 GB in the end (delta: -174.9 MB). Peak memory consumption was 51.1 MB. Max. memory is 11.5 GB. [2018-10-27 04:46:53,555 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 1.0 GB. Free memory is still 985.4 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-27 04:46:53,556 INFO L168 Benchmark]: CACSL2BoogieTranslator took 168.13 ms. Allocated memory is still 1.0 GB. Free memory was 961.8 MB in the beginning and 951.1 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-10-27 04:46:53,556 INFO L168 Benchmark]: Boogie Procedure Inliner took 28.27 ms. Allocated memory is still 1.0 GB. Free memory was 951.1 MB in the beginning and 948.4 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2018-10-27 04:46:53,556 INFO L168 Benchmark]: Boogie Preprocessor took 18.54 ms. Allocated memory is still 1.0 GB. Free memory is still 948.4 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-27 04:46:53,557 INFO L168 Benchmark]: RCFGBuilder took 512.30 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 154.1 MB). Free memory was 948.4 MB in the beginning and 1.1 GB in the end (delta: -192.3 MB). Peak memory consumption was 23.0 MB. Max. memory is 11.5 GB. [2018-10-27 04:46:53,557 INFO L168 Benchmark]: TraceAbstraction took 6140.61 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 71.8 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 1.3 MB). Peak memory consumption was 73.1 MB. Max. memory is 11.5 GB. [2018-10-27 04:46:53,557 INFO L168 Benchmark]: Witness Printer took 46.69 ms. Allocated memory is still 1.3 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-27 04:46:53,562 INFO L336 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 985.4 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 168.13 ms. Allocated memory is still 1.0 GB. Free memory was 961.8 MB in the beginning and 951.1 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 28.27 ms. Allocated memory is still 1.0 GB. Free memory was 951.1 MB in the beginning and 948.4 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 18.54 ms. Allocated memory is still 1.0 GB. Free memory is still 948.4 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 512.30 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 154.1 MB). Free memory was 948.4 MB in the beginning and 1.1 GB in the end (delta: -192.3 MB). Peak memory consumption was 23.0 MB. Max. memory is 11.5 GB. * TraceAbstraction took 6140.61 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 71.8 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 1.3 MB). Peak memory consumption was 73.1 MB. Max. memory is 11.5 GB. * Witness Printer took 46.69 ms. Allocated memory is still 1.3 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 5]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 13]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 13]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - AllSpecificationsHoldResult: All specifications hold 7 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 29 locations, 7 error locations. SAFE Result, 6.0s OverallTime, 12 OverallIterations, 6 TraceHistogramMax, 1.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 219 SDtfs, 276 SDslu, 356 SDs, 0 SdLazy, 258 SolverSat, 37 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 468 GetRequests, 380 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 2.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=42occurred in iteration=11, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 1.6s AbstIntTime, 4 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 12 MinimizatonAttempts, 57 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 2.3s InterpolantComputationTime, 457 NumberOfCodeBlocks, 397 NumberOfCodeBlocksAsserted, 19 NumberOfCheckSat, 633 ConstructedInterpolants, 4 QuantifiedInterpolants, 93318 SizeOfPredicates, 31 NumberOfNonLiveVariables, 726 ConjunctsInSsa, 85 ConjunctsInUnsatCore, 26 InterpolantComputations, 11 PerfectInterpolantSequences, 242/575 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...