./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety-ext3/scopes4-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 678e0110 Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_5da1d308-d589-4e5f-94fb-a8f2dd2efcc6/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_5da1d308-d589-4e5f-94fb-a8f2dd2efcc6/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_5da1d308-d589-4e5f-94fb-a8f2dd2efcc6/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_5da1d308-d589-4e5f-94fb-a8f2dd2efcc6/bin/uautomizer/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-ext3/scopes4-1.c -s /tmp/vcloud-vcloud-master/worker/run_dir_5da1d308-d589-4e5f-94fb-a8f2dd2efcc6/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_5da1d308-d589-4e5f-94fb-a8f2dd2efcc6/bin/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 87dcbb1d4539995e5aba39e6053775ca0fac811e .................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- Skipped default analysis because property is memsafety ### Bit-precise run ### This is Ultimate 0.1.24-678e011 [2019-11-19 23:24:03,040 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-19 23:24:03,042 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-19 23:24:03,053 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-19 23:24:03,055 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-19 23:24:03,057 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-19 23:24:03,059 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-19 23:24:03,067 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-19 23:24:03,069 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-19 23:24:03,072 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-19 23:24:03,073 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-19 23:24:03,075 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-19 23:24:03,075 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-19 23:24:03,077 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-19 23:24:03,079 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-19 23:24:03,080 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-19 23:24:03,081 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-19 23:24:03,084 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-19 23:24:03,087 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-19 23:24:03,090 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-19 23:24:03,094 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-19 23:24:03,096 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-19 23:24:03,098 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-19 23:24:03,099 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-19 23:24:03,103 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-19 23:24:03,103 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-19 23:24:03,104 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-19 23:24:03,105 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-19 23:24:03,106 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-19 23:24:03,107 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-19 23:24:03,108 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-19 23:24:03,108 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-19 23:24:03,109 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-19 23:24:03,110 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-19 23:24:03,111 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-19 23:24:03,111 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-19 23:24:03,112 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-19 23:24:03,112 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-19 23:24:03,112 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-19 23:24:03,113 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-19 23:24:03,115 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-19 23:24:03,115 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_5da1d308-d589-4e5f-94fb-a8f2dd2efcc6/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2019-11-19 23:24:03,140 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-19 23:24:03,140 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-19 23:24:03,141 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-19 23:24:03,141 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-19 23:24:03,141 INFO L138 SettingsManager]: * Use SBE=true [2019-11-19 23:24:03,141 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-19 23:24:03,142 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-19 23:24:03,142 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-11-19 23:24:03,142 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-19 23:24:03,142 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-19 23:24:03,143 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-19 23:24:03,143 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2019-11-19 23:24:03,143 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2019-11-19 23:24:03,143 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2019-11-19 23:24:03,143 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-19 23:24:03,144 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2019-11-19 23:24:03,144 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2019-11-19 23:24:03,144 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-19 23:24:03,144 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-19 23:24:03,144 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-19 23:24:03,145 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-19 23:24:03,145 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-19 23:24:03,145 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-19 23:24:03,145 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-19 23:24:03,146 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-19 23:24:03,146 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-19 23:24:03,146 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2019-11-19 23:24:03,146 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2019-11-19 23:24:03,146 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-19 23:24:03,147 INFO L138 SettingsManager]: * Logic for external solver=AUFBV Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_5da1d308-d589-4e5f-94fb-a8f2dd2efcc6/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 87dcbb1d4539995e5aba39e6053775ca0fac811e [2019-11-19 23:24:03,279 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-19 23:24:03,289 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-19 23:24:03,292 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-19 23:24:03,293 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-19 23:24:03,293 INFO L275 PluginConnector]: CDTParser initialized [2019-11-19 23:24:03,294 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_5da1d308-d589-4e5f-94fb-a8f2dd2efcc6/bin/uautomizer/../../sv-benchmarks/c/memsafety-ext3/scopes4-1.c [2019-11-19 23:24:03,342 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_5da1d308-d589-4e5f-94fb-a8f2dd2efcc6/bin/uautomizer/data/6f6d6f280/95fd0b5195764e8eb75a91a2b07732cb/FLAG79a5a5651 [2019-11-19 23:24:03,750 INFO L306 CDTParser]: Found 1 translation units. [2019-11-19 23:24:03,751 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_5da1d308-d589-4e5f-94fb-a8f2dd2efcc6/sv-benchmarks/c/memsafety-ext3/scopes4-1.c [2019-11-19 23:24:03,755 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_5da1d308-d589-4e5f-94fb-a8f2dd2efcc6/bin/uautomizer/data/6f6d6f280/95fd0b5195764e8eb75a91a2b07732cb/FLAG79a5a5651 [2019-11-19 23:24:03,764 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_5da1d308-d589-4e5f-94fb-a8f2dd2efcc6/bin/uautomizer/data/6f6d6f280/95fd0b5195764e8eb75a91a2b07732cb [2019-11-19 23:24:03,767 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-19 23:24:03,768 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-19 23:24:03,769 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-19 23:24:03,769 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-19 23:24:03,772 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-19 23:24:03,773 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 11:24:03" (1/1) ... [2019-11-19 23:24:03,775 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6709ef4c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 11:24:03, skipping insertion in model container [2019-11-19 23:24:03,776 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 11:24:03" (1/1) ... [2019-11-19 23:24:03,782 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-19 23:24:03,800 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-19 23:24:04,049 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-19 23:24:04,069 INFO L188 MainTranslator]: Completed pre-run [2019-11-19 23:24:04,085 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-19 23:24:04,103 INFO L192 MainTranslator]: Completed translation [2019-11-19 23:24:04,104 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 11:24:04 WrapperNode [2019-11-19 23:24:04,104 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-19 23:24:04,104 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-19 23:24:04,104 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-19 23:24:04,105 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-19 23:24:04,116 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 11:24:04" (1/1) ... [2019-11-19 23:24:04,117 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 11:24:04" (1/1) ... [2019-11-19 23:24:04,125 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 11:24:04" (1/1) ... [2019-11-19 23:24:04,125 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 11:24:04" (1/1) ... [2019-11-19 23:24:04,133 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 11:24:04" (1/1) ... [2019-11-19 23:24:04,134 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 11:24:04" (1/1) ... [2019-11-19 23:24:04,136 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 11:24:04" (1/1) ... [2019-11-19 23:24:04,138 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-19 23:24:04,139 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-19 23:24:04,139 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-19 23:24:04,139 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-19 23:24:04,142 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 11:24:04" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5da1d308-d589-4e5f-94fb-a8f2dd2efcc6/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-19 23:24:04,199 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-19 23:24:04,199 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-19 23:24:04,199 INFO L138 BoogieDeclarations]: Found implementation of procedure foo2 [2019-11-19 23:24:04,200 INFO L138 BoogieDeclarations]: Found implementation of procedure foo [2019-11-19 23:24:04,200 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-19 23:24:04,200 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2019-11-19 23:24:04,200 INFO L130 BoogieDeclarations]: Found specification of procedure foo2 [2019-11-19 23:24:04,200 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2019-11-19 23:24:04,200 INFO L130 BoogieDeclarations]: Found specification of procedure foo [2019-11-19 23:24:04,200 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-19 23:24:04,201 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-19 23:24:04,201 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2019-11-19 23:24:04,201 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-19 23:24:04,201 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2019-11-19 23:24:04,201 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-19 23:24:04,201 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2019-11-19 23:24:04,201 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2019-11-19 23:24:04,201 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-19 23:24:04,543 INFO L280 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-19 23:24:04,543 INFO L285 CfgBuilder]: Removed 0 assume(true) statements. [2019-11-19 23:24:04,545 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 11:24:04 BoogieIcfgContainer [2019-11-19 23:24:04,545 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-19 23:24:04,546 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-19 23:24:04,546 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-19 23:24:04,549 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-19 23:24:04,549 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 11:24:03" (1/3) ... [2019-11-19 23:24:04,549 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@540c0e4d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 11:24:04, skipping insertion in model container [2019-11-19 23:24:04,550 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 11:24:04" (2/3) ... [2019-11-19 23:24:04,550 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@540c0e4d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 11:24:04, skipping insertion in model container [2019-11-19 23:24:04,550 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 11:24:04" (3/3) ... [2019-11-19 23:24:04,552 INFO L109 eAbstractionObserver]: Analyzing ICFG scopes4-1.c [2019-11-19 23:24:04,560 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-19 23:24:04,566 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 5 error locations. [2019-11-19 23:24:04,576 INFO L249 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2019-11-19 23:24:04,592 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-19 23:24:04,592 INFO L374 AbstractCegarLoop]: Hoare is false [2019-11-19 23:24:04,592 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-19 23:24:04,593 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-19 23:24:04,593 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-19 23:24:04,593 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-19 23:24:04,593 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-19 23:24:04,593 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-19 23:24:04,605 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2019-11-19 23:24:04,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-19 23:24:04,613 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 23:24:04,614 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 23:24:04,615 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr2ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, foo2Err0REQUIRES_VIOLATION, foo2Err1REQUIRES_VIOLATION]=== [2019-11-19 23:24:04,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 23:24:04,620 INFO L82 PathProgramCache]: Analyzing trace with hash 354125337, now seen corresponding path program 1 times [2019-11-19 23:24:04,630 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-19 23:24:04,631 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1356320606] [2019-11-19 23:24:04,631 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5da1d308-d589-4e5f-94fb-a8f2dd2efcc6/bin/uautomizer/cvc4 Starting monitored process 2 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-19 23:24:04,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 23:24:04,732 INFO L255 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-19 23:24:04,736 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 23:24:04,865 INFO L343 Elim1Store]: treesize reduction 27, result has 50.9 percent of original size [2019-11-19 23:24:04,865 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2019-11-19 23:24:04,866 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 23:24:04,921 INFO L567 ElimStorePlain]: treesize reduction 10, result has 69.7 percent of original size [2019-11-19 23:24:04,923 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-19 23:24:04,926 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-19 23:24:04,926 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:12, output treesize:23 [2019-11-19 23:24:04,928 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-19 23:24:04,959 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:24:04,961 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-19 23:24:05,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:24:05,001 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1356320606] [2019-11-19 23:24:05,002 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-19 23:24:05,002 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2019-11-19 23:24:05,003 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375208201] [2019-11-19 23:24:05,007 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-19 23:24:05,007 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-19 23:24:05,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-19 23:24:05,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-19 23:24:05,025 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 3 states. [2019-11-19 23:24:05,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 23:24:05,060 INFO L93 Difference]: Finished difference Result 24 states and 23 transitions. [2019-11-19 23:24:05,061 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-19 23:24:05,062 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2019-11-19 23:24:05,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 23:24:05,070 INFO L225 Difference]: With dead ends: 24 [2019-11-19 23:24:05,070 INFO L226 Difference]: Without dead ends: 19 [2019-11-19 23:24:05,071 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-19 23:24:05,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2019-11-19 23:24:05,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2019-11-19 23:24:05,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-11-19 23:24:05,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 18 transitions. [2019-11-19 23:24:05,096 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 18 transitions. Word has length 8 [2019-11-19 23:24:05,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 23:24:05,096 INFO L462 AbstractCegarLoop]: Abstraction has 19 states and 18 transitions. [2019-11-19 23:24:05,096 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-19 23:24:05,096 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 18 transitions. [2019-11-19 23:24:05,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-19 23:24:05,097 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 23:24:05,097 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 23:24:05,298 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-19 23:24:05,299 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr2ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, foo2Err0REQUIRES_VIOLATION, foo2Err1REQUIRES_VIOLATION]=== [2019-11-19 23:24:05,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 23:24:05,300 INFO L82 PathProgramCache]: Analyzing trace with hash 354125338, now seen corresponding path program 1 times [2019-11-19 23:24:05,300 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-19 23:24:05,300 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [313296197] [2019-11-19 23:24:05,300 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5da1d308-d589-4e5f-94fb-a8f2dd2efcc6/bin/uautomizer/cvc4 Starting monitored process 3 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-19 23:24:05,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 23:24:05,404 INFO L255 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-19 23:24:05,405 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 23:24:05,417 INFO L392 ElimStorePlain]: Different costs {0=[|v_#length_15|], 2=[|v_#valid_22|]} [2019-11-19 23:24:05,422 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-19 23:24:05,424 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2019-11-19 23:24:05,425 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 23:24:05,437 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 23:24:05,443 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-19 23:24:05,448 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2019-11-19 23:24:05,448 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-19 23:24:05,458 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 23:24:05,459 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-19 23:24:05,459 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:24, output treesize:14 [2019-11-19 23:24:05,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:24:05,491 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-19 23:24:05,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:24:05,614 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [313296197] [2019-11-19 23:24:05,615 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-19 23:24:05,615 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2019-11-19 23:24:05,615 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688225868] [2019-11-19 23:24:05,616 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-19 23:24:05,616 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-19 23:24:05,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-19 23:24:05,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-19 23:24:05,617 INFO L87 Difference]: Start difference. First operand 19 states and 18 transitions. Second operand 4 states. [2019-11-19 23:24:05,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 23:24:05,633 INFO L93 Difference]: Finished difference Result 18 states and 17 transitions. [2019-11-19 23:24:05,633 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-19 23:24:05,634 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2019-11-19 23:24:05,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 23:24:05,634 INFO L225 Difference]: With dead ends: 18 [2019-11-19 23:24:05,635 INFO L226 Difference]: Without dead ends: 18 [2019-11-19 23:24:05,635 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-19 23:24:05,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-11-19 23:24:05,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2019-11-19 23:24:05,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-11-19 23:24:05,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 17 transitions. [2019-11-19 23:24:05,638 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 17 transitions. Word has length 8 [2019-11-19 23:24:05,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 23:24:05,639 INFO L462 AbstractCegarLoop]: Abstraction has 18 states and 17 transitions. [2019-11-19 23:24:05,639 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-19 23:24:05,639 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 17 transitions. [2019-11-19 23:24:05,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-19 23:24:05,640 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 23:24:05,640 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 23:24:05,842 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-19 23:24:05,842 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr2ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, foo2Err0REQUIRES_VIOLATION, foo2Err1REQUIRES_VIOLATION]=== [2019-11-19 23:24:05,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 23:24:05,843 INFO L82 PathProgramCache]: Analyzing trace with hash 2146229308, now seen corresponding path program 1 times [2019-11-19 23:24:05,843 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-19 23:24:05,843 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [22832105] [2019-11-19 23:24:05,843 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5da1d308-d589-4e5f-94fb-a8f2dd2efcc6/bin/uautomizer/cvc4 Starting monitored process 4 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-19 23:24:05,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 23:24:05,941 INFO L255 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-19 23:24:05,942 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 23:24:06,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:24:06,023 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-19 23:24:06,212 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:24:06,212 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [22832105] [2019-11-19 23:24:06,212 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-19 23:24:06,213 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 10 [2019-11-19 23:24:06,213 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850070829] [2019-11-19 23:24:06,213 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-19 23:24:06,213 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-19 23:24:06,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-19 23:24:06,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2019-11-19 23:24:06,214 INFO L87 Difference]: Start difference. First operand 18 states and 17 transitions. Second operand 11 states. [2019-11-19 23:24:06,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 23:24:06,433 INFO L93 Difference]: Finished difference Result 17 states and 16 transitions. [2019-11-19 23:24:06,434 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-19 23:24:06,434 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 16 [2019-11-19 23:24:06,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 23:24:06,435 INFO L225 Difference]: With dead ends: 17 [2019-11-19 23:24:06,435 INFO L226 Difference]: Without dead ends: 17 [2019-11-19 23:24:06,436 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2019-11-19 23:24:06,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-11-19 23:24:06,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2019-11-19 23:24:06,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-11-19 23:24:06,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 16 transitions. [2019-11-19 23:24:06,439 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 16 transitions. Word has length 16 [2019-11-19 23:24:06,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 23:24:06,439 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 16 transitions. [2019-11-19 23:24:06,439 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-19 23:24:06,439 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 16 transitions. [2019-11-19 23:24:06,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-19 23:24:06,440 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 23:24:06,440 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 23:24:06,640 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-19 23:24:06,641 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr2ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, foo2Err0REQUIRES_VIOLATION, foo2Err1REQUIRES_VIOLATION]=== [2019-11-19 23:24:06,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 23:24:06,641 INFO L82 PathProgramCache]: Analyzing trace with hash 2146229309, now seen corresponding path program 1 times [2019-11-19 23:24:06,641 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-19 23:24:06,642 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1846482581] [2019-11-19 23:24:06,642 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5da1d308-d589-4e5f-94fb-a8f2dd2efcc6/bin/uautomizer/cvc4 Starting monitored process 5 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-19 23:24:06,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 23:24:06,746 INFO L255 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-19 23:24:06,748 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 23:24:06,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:24:06,937 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-19 23:24:07,316 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-19 23:24:07,341 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2019-11-19 23:24:07,342 INFO L496 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-19 23:24:07,357 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2019-11-19 23:24:07,358 INFO L496 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-19 23:24:07,376 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2019-11-19 23:24:07,377 INFO L496 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-19 23:24:07,427 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 23:24:07,428 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 3 xjuncts. [2019-11-19 23:24:07,429 INFO L221 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:47, output treesize:39 [2019-11-19 23:24:07,944 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-19 23:24:07,966 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 31 [2019-11-19 23:24:07,967 INFO L496 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-19 23:24:07,976 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2019-11-19 23:24:07,977 INFO L496 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-19 23:24:08,126 WARN L191 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 20 [2019-11-19 23:24:08,139 INFO L567 ElimStorePlain]: treesize reduction 28, result has 56.3 percent of original size [2019-11-19 23:24:08,140 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2019-11-19 23:24:08,141 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:72, output treesize:36 [2019-11-19 23:24:08,412 WARN L191 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2019-11-19 23:24:08,590 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 31 [2019-11-19 23:24:08,591 INFO L496 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-19 23:24:08,600 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2019-11-19 23:24:08,601 INFO L496 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-19 23:24:08,754 WARN L191 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 20 [2019-11-19 23:24:08,755 INFO L567 ElimStorePlain]: treesize reduction 28, result has 56.3 percent of original size [2019-11-19 23:24:08,756 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2019-11-19 23:24:08,756 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:72, output treesize:36 [2019-11-19 23:24:08,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:24:08,813 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1846482581] [2019-11-19 23:24:08,813 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-19 23:24:08,814 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 15 [2019-11-19 23:24:08,814 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459423860] [2019-11-19 23:24:08,814 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-19 23:24:08,814 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-19 23:24:08,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-19 23:24:08,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2019-11-19 23:24:08,815 INFO L87 Difference]: Start difference. First operand 17 states and 16 transitions. Second operand 16 states. [2019-11-19 23:24:09,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 23:24:09,175 INFO L93 Difference]: Finished difference Result 16 states and 15 transitions. [2019-11-19 23:24:09,175 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-19 23:24:09,175 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 16 [2019-11-19 23:24:09,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 23:24:09,175 INFO L225 Difference]: With dead ends: 16 [2019-11-19 23:24:09,176 INFO L226 Difference]: Without dead ends: 0 [2019-11-19 23:24:09,176 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2019-11-19 23:24:09,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-11-19 23:24:09,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-11-19 23:24:09,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-11-19 23:24:09,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-11-19 23:24:09,177 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 16 [2019-11-19 23:24:09,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 23:24:09,177 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-19 23:24:09,177 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-19 23:24:09,178 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-11-19 23:24:09,178 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-11-19 23:24:09,378 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-19 23:24:09,389 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.11 11:24:09 BoogieIcfgContainer [2019-11-19 23:24:09,389 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-19 23:24:09,390 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-19 23:24:09,390 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-19 23:24:09,390 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-19 23:24:09,391 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 11:24:04" (3/4) ... [2019-11-19 23:24:09,394 INFO L137 WitnessPrinter]: Generating witness for correct program [2019-11-19 23:24:09,399 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2019-11-19 23:24:09,399 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure foo [2019-11-19 23:24:09,399 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2019-11-19 23:24:09,400 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure foo2 [2019-11-19 23:24:09,405 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 13 nodes and edges [2019-11-19 23:24:09,406 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2019-11-19 23:24:09,406 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2019-11-19 23:24:09,406 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2019-11-19 23:24:09,441 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_5da1d308-d589-4e5f-94fb-a8f2dd2efcc6/bin/uautomizer/witness.graphml [2019-11-19 23:24:09,441 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-19 23:24:09,443 INFO L168 Benchmark]: Toolchain (without parser) took 5674.78 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 141.6 MB). Free memory was 950.1 MB in the beginning and 1.1 GB in the end (delta: -170.1 MB). There was no memory consumed. Max. memory is 11.5 GB. [2019-11-19 23:24:09,443 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-19 23:24:09,444 INFO L168 Benchmark]: CACSL2BoogieTranslator took 335.23 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 141.6 MB). Free memory was 950.1 MB in the beginning and 1.1 GB in the end (delta: -186.6 MB). Peak memory consumption was 22.5 MB. Max. memory is 11.5 GB. [2019-11-19 23:24:09,444 INFO L168 Benchmark]: Boogie Preprocessor took 33.93 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-19 23:24:09,444 INFO L168 Benchmark]: RCFGBuilder took 406.34 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 23.7 MB). Peak memory consumption was 23.7 MB. Max. memory is 11.5 GB. [2019-11-19 23:24:09,445 INFO L168 Benchmark]: TraceAbstraction took 4843.73 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: -15.8 MB). There was no memory consumed. Max. memory is 11.5 GB. [2019-11-19 23:24:09,445 INFO L168 Benchmark]: Witness Printer took 51.59 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 8.5 MB). Peak memory consumption was 8.5 MB. Max. memory is 11.5 GB. [2019-11-19 23:24:09,447 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 335.23 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 141.6 MB). Free memory was 950.1 MB in the beginning and 1.1 GB in the end (delta: -186.6 MB). Peak memory consumption was 22.5 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 33.93 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 406.34 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 23.7 MB). Peak memory consumption was 23.7 MB. Max. memory is 11.5 GB. * TraceAbstraction took 4843.73 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: -15.8 MB). There was no memory consumed. Max. memory is 11.5 GB. * Witness Printer took 51.59 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 8.5 MB). Peak memory consumption was 8.5 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 16]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 18]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 18]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 6]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 6]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - AllSpecificationsHoldResult: All specifications hold 5 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 26 locations, 5 error locations. Result: SAFE, OverallTime: 4.7s, OverallIterations: 4, TraceHistogramMax: 1, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 54 SDtfs, 52 SDslu, 64 SDs, 0 SdLazy, 184 SolverSat, 19 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 96 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 1.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=26occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 2.8s InterpolantComputationTime, 48 NumberOfCodeBlocks, 48 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 88 ConstructedInterpolants, 16 QuantifiedInterpolants, 12241 SizeOfPredicates, 20 NumberOfNonLiveVariables, 250 ConjunctsInSsa, 26 ConjunctsInUnsatCore, 8 InterpolantComputations, 8 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...