./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/ldv-memsafety/memset2.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_42d48cd7-0966-40cb-84d2-2c7d6eb43db8/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_42d48cd7-0966-40cb-84d2-2c7d6eb43db8/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_42d48cd7-0966-40cb-84d2-2c7d6eb43db8/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_42d48cd7-0966-40cb-84d2-2c7d6eb43db8/bin/uautomizer/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/memset2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_42d48cd7-0966-40cb-84d2-2c7d6eb43db8/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_42d48cd7-0966-40cb-84d2-2c7d6eb43db8/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 89c40e0e226fdcfbda8631272bf2c238348d58a6 .......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 [2019-11-20 10:50:43,532 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-20 10:50:43,534 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-20 10:50:43,553 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-20 10:50:43,553 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-20 10:50:43,555 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-20 10:50:43,557 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-20 10:50:43,568 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-20 10:50:43,574 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-20 10:50:43,578 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-20 10:50:43,580 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-20 10:50:43,581 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-20 10:50:43,582 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-20 10:50:43,584 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-20 10:50:43,586 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-20 10:50:43,587 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-20 10:50:43,588 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-20 10:50:43,590 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-20 10:50:43,593 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-20 10:50:43,598 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-20 10:50:43,603 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-20 10:50:43,605 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-20 10:50:43,608 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-20 10:50:43,609 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-20 10:50:43,615 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-20 10:50:43,615 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-20 10:50:43,615 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-20 10:50:43,617 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-20 10:50:43,618 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-20 10:50:43,619 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-20 10:50:43,619 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-20 10:50:43,620 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-20 10:50:43,621 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-20 10:50:43,622 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-20 10:50:43,623 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-20 10:50:43,623 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-20 10:50:43,624 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-20 10:50:43,624 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-20 10:50:43,625 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-20 10:50:43,625 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-20 10:50:43,627 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-20 10:50:43,628 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_42d48cd7-0966-40cb-84d2-2c7d6eb43db8/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2019-11-20 10:50:43,657 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-20 10:50:43,669 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-20 10:50:43,670 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-20 10:50:43,670 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-20 10:50:43,670 INFO L138 SettingsManager]: * Use SBE=true [2019-11-20 10:50:43,671 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-20 10:50:43,671 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-20 10:50:43,671 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-11-20 10:50:43,671 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-20 10:50:43,672 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-20 10:50:43,672 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-20 10:50:43,672 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2019-11-20 10:50:43,672 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2019-11-20 10:50:43,673 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2019-11-20 10:50:43,673 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-20 10:50:43,673 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2019-11-20 10:50:43,674 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2019-11-20 10:50:43,674 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-20 10:50:43,674 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-20 10:50:43,674 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-20 10:50:43,675 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-20 10:50:43,675 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-20 10:50:43,675 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-20 10:50:43,675 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-20 10:50:43,676 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-20 10:50:43,676 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-20 10:50:43,677 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2019-11-20 10:50:43,678 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2019-11-20 10:50:43,678 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-20 10:50:43,678 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_42d48cd7-0966-40cb-84d2-2c7d6eb43db8/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 -> 89c40e0e226fdcfbda8631272bf2c238348d58a6 [2019-11-20 10:50:43,853 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-20 10:50:43,872 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-20 10:50:43,876 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-20 10:50:43,877 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-20 10:50:43,878 INFO L275 PluginConnector]: CDTParser initialized [2019-11-20 10:50:43,879 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_42d48cd7-0966-40cb-84d2-2c7d6eb43db8/bin/uautomizer/../../sv-benchmarks/c/ldv-memsafety/memset2.c [2019-11-20 10:50:43,951 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_42d48cd7-0966-40cb-84d2-2c7d6eb43db8/bin/uautomizer/data/28c5a6f66/6c288e6d358b47018644af05bf402f78/FLAGef327cc38 [2019-11-20 10:50:44,322 INFO L306 CDTParser]: Found 1 translation units. [2019-11-20 10:50:44,322 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_42d48cd7-0966-40cb-84d2-2c7d6eb43db8/sv-benchmarks/c/ldv-memsafety/memset2.c [2019-11-20 10:50:44,328 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_42d48cd7-0966-40cb-84d2-2c7d6eb43db8/bin/uautomizer/data/28c5a6f66/6c288e6d358b47018644af05bf402f78/FLAGef327cc38 [2019-11-20 10:50:44,681 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_42d48cd7-0966-40cb-84d2-2c7d6eb43db8/bin/uautomizer/data/28c5a6f66/6c288e6d358b47018644af05bf402f78 [2019-11-20 10:50:44,684 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-20 10:50:44,686 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-20 10:50:44,687 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-20 10:50:44,688 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-20 10:50:44,692 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-20 10:50:44,693 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 10:50:44" (1/1) ... [2019-11-20 10:50:44,696 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ad7b6b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:50:44, skipping insertion in model container [2019-11-20 10:50:44,697 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 10:50:44" (1/1) ... [2019-11-20 10:50:44,705 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-20 10:50:44,732 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-20 10:50:44,966 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 10:50:44,989 INFO L188 MainTranslator]: Completed pre-run [2019-11-20 10:50:45,088 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 10:50:45,108 INFO L192 MainTranslator]: Completed translation [2019-11-20 10:50:45,109 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:50:45 WrapperNode [2019-11-20 10:50:45,109 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-20 10:50:45,110 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-20 10:50:45,110 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-20 10:50:45,110 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-20 10:50:45,126 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:50:45" (1/1) ... [2019-11-20 10:50:45,128 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:50:45" (1/1) ... [2019-11-20 10:50:45,139 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:50:45" (1/1) ... [2019-11-20 10:50:45,139 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:50:45" (1/1) ... [2019-11-20 10:50:45,155 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:50:45" (1/1) ... [2019-11-20 10:50:45,160 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:50:45" (1/1) ... [2019-11-20 10:50:45,162 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:50:45" (1/1) ... [2019-11-20 10:50:45,172 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-20 10:50:45,172 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-20 10:50:45,172 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-20 10:50:45,172 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-20 10:50:45,174 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:50:45" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_42d48cd7-0966-40cb-84d2-2c7d6eb43db8/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 [2019-11-20 10:50:45,233 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-20 10:50:45,233 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-20 10:50:45,233 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-20 10:50:45,234 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2019-11-20 10:50:45,234 INFO L130 BoogieDeclarations]: Found specification of procedure memset [2019-11-20 10:50:45,234 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-20 10:50:45,234 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-20 10:50:45,234 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2019-11-20 10:50:45,235 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-20 10:50:45,235 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-20 10:50:45,235 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-20 10:50:45,351 WARN L736 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2019-11-20 10:50:45,452 INFO L280 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-20 10:50:45,452 INFO L285 CfgBuilder]: Removed 0 assume(true) statements. [2019-11-20 10:50:45,453 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:50:45 BoogieIcfgContainer [2019-11-20 10:50:45,453 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-20 10:50:45,455 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-20 10:50:45,455 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-20 10:50:45,458 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-20 10:50:45,458 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 10:50:44" (1/3) ... [2019-11-20 10:50:45,459 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29e79b1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 10:50:45, skipping insertion in model container [2019-11-20 10:50:45,459 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:50:45" (2/3) ... [2019-11-20 10:50:45,460 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29e79b1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 10:50:45, skipping insertion in model container [2019-11-20 10:50:45,460 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:50:45" (3/3) ... [2019-11-20 10:50:45,462 INFO L109 eAbstractionObserver]: Analyzing ICFG memset2.c [2019-11-20 10:50:45,472 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-20 10:50:45,480 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2019-11-20 10:50:45,492 INFO L249 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2019-11-20 10:50:45,513 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-20 10:50:45,513 INFO L374 AbstractCegarLoop]: Hoare is false [2019-11-20 10:50:45,513 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-20 10:50:45,514 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-20 10:50:45,514 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-20 10:50:45,514 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-20 10:50:45,514 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-20 10:50:45,514 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-20 10:50:45,531 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2019-11-20 10:50:45,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-11-20 10:50:45,541 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 10:50:45,542 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-11-20 10:50:45,543 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr2ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-11-20 10:50:45,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 10:50:45,549 INFO L82 PathProgramCache]: Analyzing trace with hash -1092847368, now seen corresponding path program 1 times [2019-11-20 10:50:45,561 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 10:50:45,562 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [314903922] [2019-11-20 10:50:45,562 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_42d48cd7-0966-40cb-84d2-2c7d6eb43db8/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 [2019-11-20 10:50:45,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 10:50:45,707 INFO L255 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-20 10:50:45,713 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 10:50:45,782 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-11-20 10:50:45,782 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 10:50:45,801 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 10:50:45,801 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 10:50:45,802 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2019-11-20 10:50:45,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 10:50:45,816 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 10:50:45,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 10:50:45,831 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [314903922] [2019-11-20 10:50:45,831 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 10:50:45,832 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2019-11-20 10:50:45,833 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250148420] [2019-11-20 10:50:45,838 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-20 10:50:45,838 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 10:50:45,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-20 10:50:45,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-20 10:50:45,852 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 3 states. [2019-11-20 10:50:45,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 10:50:45,910 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2019-11-20 10:50:45,911 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-20 10:50:45,912 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2019-11-20 10:50:45,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 10:50:45,920 INFO L225 Difference]: With dead ends: 19 [2019-11-20 10:50:45,921 INFO L226 Difference]: Without dead ends: 16 [2019-11-20 10:50:45,922 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-20 10:50:45,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-11-20 10:50:45,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2019-11-20 10:50:45,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-11-20 10:50:45,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2019-11-20 10:50:45,954 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 7 [2019-11-20 10:50:45,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 10:50:45,954 INFO L462 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2019-11-20 10:50:45,955 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-20 10:50:45,955 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2019-11-20 10:50:45,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-11-20 10:50:45,955 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 10:50:45,955 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-11-20 10:50:46,156 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 10:50:46,156 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr2ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-11-20 10:50:46,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 10:50:46,157 INFO L82 PathProgramCache]: Analyzing trace with hash -1092847367, now seen corresponding path program 1 times [2019-11-20 10:50:46,157 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 10:50:46,158 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [860115894] [2019-11-20 10:50:46,158 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_42d48cd7-0966-40cb-84d2-2c7d6eb43db8/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 [2019-11-20 10:50:46,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 10:50:46,226 INFO L255 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-20 10:50:46,227 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 10:50:46,240 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-11-20 10:50:46,240 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 10:50:46,247 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 10:50:46,247 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 10:50:46,248 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2019-11-20 10:50:46,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 10:50:46,270 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 10:50:46,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 10:50:46,330 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [860115894] [2019-11-20 10:50:46,331 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 10:50:46,331 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2019-11-20 10:50:46,331 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462376543] [2019-11-20 10:50:46,332 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-20 10:50:46,332 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 10:50:46,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-20 10:50:46,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-20 10:50:46,333 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 4 states. [2019-11-20 10:50:46,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 10:50:46,374 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2019-11-20 10:50:46,375 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-20 10:50:46,375 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2019-11-20 10:50:46,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 10:50:46,376 INFO L225 Difference]: With dead ends: 15 [2019-11-20 10:50:46,376 INFO L226 Difference]: Without dead ends: 15 [2019-11-20 10:50:46,377 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-20 10:50:46,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-11-20 10:50:46,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2019-11-20 10:50:46,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-11-20 10:50:46,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2019-11-20 10:50:46,381 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 7 [2019-11-20 10:50:46,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 10:50:46,381 INFO L462 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2019-11-20 10:50:46,381 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-20 10:50:46,381 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2019-11-20 10:50:46,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-20 10:50:46,382 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 10:50:46,382 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 10:50:46,585 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 10:50:46,586 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr2ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-11-20 10:50:46,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 10:50:46,586 INFO L82 PathProgramCache]: Analyzing trace with hash 1462327129, now seen corresponding path program 1 times [2019-11-20 10:50:46,587 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 10:50:46,587 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [779970966] [2019-11-20 10:50:46,587 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_42d48cd7-0966-40cb-84d2-2c7d6eb43db8/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 [2019-11-20 10:50:46,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 10:50:46,664 INFO L255 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-20 10:50:46,666 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 10:50:46,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 10:50:46,695 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 10:50:46,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 10:50:46,774 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [779970966] [2019-11-20 10:50:46,774 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 10:50:46,774 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2019-11-20 10:50:46,774 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369745697] [2019-11-20 10:50:46,775 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-20 10:50:46,775 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 10:50:46,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-20 10:50:46,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-11-20 10:50:46,776 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 6 states. [2019-11-20 10:50:46,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 10:50:46,841 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2019-11-20 10:50:46,843 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-20 10:50:46,843 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2019-11-20 10:50:46,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 10:50:46,844 INFO L225 Difference]: With dead ends: 21 [2019-11-20 10:50:46,844 INFO L226 Difference]: Without dead ends: 17 [2019-11-20 10:50:46,845 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2019-11-20 10:50:46,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-11-20 10:50:46,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2019-11-20 10:50:46,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-11-20 10:50:46,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2019-11-20 10:50:46,854 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 14 [2019-11-20 10:50:46,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 10:50:46,854 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2019-11-20 10:50:46,854 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-20 10:50:46,855 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2019-11-20 10:50:46,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-20 10:50:46,855 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 10:50:46,856 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 10:50:47,058 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 10:50:47,058 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr2ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-11-20 10:50:47,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 10:50:47,058 INFO L82 PathProgramCache]: Analyzing trace with hash -1034761479, now seen corresponding path program 1 times [2019-11-20 10:50:47,059 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 10:50:47,059 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1205197680] [2019-11-20 10:50:47,060 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_42d48cd7-0966-40cb-84d2-2c7d6eb43db8/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 [2019-11-20 10:50:47,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 10:50:47,141 INFO L255 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-20 10:50:47,143 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 10:50:47,181 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 10:50:47,182 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 10:50:47,354 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 10:50:47,354 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1205197680] [2019-11-20 10:50:47,354 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 10:50:47,355 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2019-11-20 10:50:47,355 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355584928] [2019-11-20 10:50:47,355 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-20 10:50:47,356 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 10:50:47,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-20 10:50:47,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2019-11-20 10:50:47,356 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 10 states. [2019-11-20 10:50:47,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 10:50:47,647 INFO L93 Difference]: Finished difference Result 25 states and 27 transitions. [2019-11-20 10:50:47,648 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-20 10:50:47,648 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 16 [2019-11-20 10:50:47,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 10:50:47,649 INFO L225 Difference]: With dead ends: 25 [2019-11-20 10:50:47,649 INFO L226 Difference]: Without dead ends: 21 [2019-11-20 10:50:47,650 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2019-11-20 10:50:47,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-11-20 10:50:47,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2019-11-20 10:50:47,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-11-20 10:50:47,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2019-11-20 10:50:47,653 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 16 [2019-11-20 10:50:47,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 10:50:47,654 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2019-11-20 10:50:47,654 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-20 10:50:47,654 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2019-11-20 10:50:47,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-11-20 10:50:47,655 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 10:50:47,655 INFO L410 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 10:50:47,855 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 10:50:47,856 INFO L410 AbstractCegarLoop]: === Iteration 5 === [mainErr2ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-11-20 10:50:47,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 10:50:47,856 INFO L82 PathProgramCache]: Analyzing trace with hash 351566393, now seen corresponding path program 2 times [2019-11-20 10:50:47,857 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 10:50:47,857 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [213333408] [2019-11-20 10:50:47,857 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_42d48cd7-0966-40cb-84d2-2c7d6eb43db8/bin/uautomizer/cvc4 Starting monitored process 6 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 10:50:47,936 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2019-11-20 10:50:47,936 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 10:50:47,938 INFO L255 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-20 10:50:47,940 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 10:50:47,945 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-11-20 10:50:47,946 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 10:50:47,948 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 10:50:47,948 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 10:50:47,948 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2019-11-20 10:50:48,054 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 10:50:48,054 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 39 [2019-11-20 10:50:48,056 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 10:50:48,087 INFO L567 ElimStorePlain]: treesize reduction 10, result has 60.0 percent of original size [2019-11-20 10:50:48,088 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 10:50:48,091 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. [2019-11-20 10:50:48,092 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:17, output treesize:15 [2019-11-20 10:50:48,092 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 10:50:48,116 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 10:50:48,146 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 10:50:48,169 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 10:50:48,190 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 10:50:48,213 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 10:50:48,231 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 10:50:48,250 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 10:50:48,277 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 10:50:48,294 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 10:50:48,310 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 10:50:48,330 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 10:50:48,377 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-20 10:50:48,378 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 10:50:52,485 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-20 10:50:52,486 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [213333408] [2019-11-20 10:50:52,486 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 10:50:52,486 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 8 [2019-11-20 10:50:52,487 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216978217] [2019-11-20 10:50:52,487 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-20 10:50:52,487 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 10:50:52,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-20 10:50:52,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=49, Unknown=2, NotChecked=0, Total=72 [2019-11-20 10:50:52,489 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 9 states. [2019-11-20 10:50:52,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 10:50:52,668 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2019-11-20 10:50:52,669 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-20 10:50:52,669 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 20 [2019-11-20 10:50:52,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 10:50:52,669 INFO L225 Difference]: With dead ends: 20 [2019-11-20 10:50:52,670 INFO L226 Difference]: Without dead ends: 0 [2019-11-20 10:50:52,670 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 12 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=34, Invalid=74, Unknown=2, NotChecked=0, Total=110 [2019-11-20 10:50:52,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-11-20 10:50:52,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-11-20 10:50:52,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-11-20 10:50:52,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-11-20 10:50:52,671 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 20 [2019-11-20 10:50:52,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 10:50:52,672 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-20 10:50:52,672 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-20 10:50:52,672 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-11-20 10:50:52,672 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-11-20 10:50:52,882 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 10:50:52,887 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.11 10:50:52 BoogieIcfgContainer [2019-11-20 10:50:52,887 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-20 10:50:52,888 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-20 10:50:52,888 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-20 10:50:52,888 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-20 10:50:52,889 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:50:45" (3/4) ... [2019-11-20 10:50:52,893 INFO L137 WitnessPrinter]: Generating witness for correct program [2019-11-20 10:50:52,905 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2019-11-20 10:50:52,906 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure #Ultimate.C_memset [2019-11-20 10:50:52,906 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2019-11-20 10:50:52,911 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2019-11-20 10:50:52,911 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2019-11-20 10:50:52,912 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2019-11-20 10:50:52,912 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2019-11-20 10:50:52,953 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_42d48cd7-0966-40cb-84d2-2c7d6eb43db8/bin/uautomizer/witness.graphml [2019-11-20 10:50:52,953 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-20 10:50:52,954 INFO L168 Benchmark]: Toolchain (without parser) took 8268.51 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 140.5 MB). Free memory was 944.7 MB in the beginning and 946.9 MB in the end (delta: -2.2 MB). Peak memory consumption was 138.3 MB. Max. memory is 11.5 GB. [2019-11-20 10:50:52,955 INFO L168 Benchmark]: CDTParser took 0.22 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. [2019-11-20 10:50:52,955 INFO L168 Benchmark]: CACSL2BoogieTranslator took 422.28 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 140.5 MB). Free memory was 944.7 MB in the beginning and 1.1 GB in the end (delta: -190.7 MB). Peak memory consumption was 22.9 MB. Max. memory is 11.5 GB. [2019-11-20 10:50:52,956 INFO L168 Benchmark]: Boogie Preprocessor took 61.94 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. [2019-11-20 10:50:52,956 INFO L168 Benchmark]: RCFGBuilder took 281.53 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: 18.3 MB). Peak memory consumption was 18.3 MB. Max. memory is 11.5 GB. [2019-11-20 10:50:52,957 INFO L168 Benchmark]: TraceAbstraction took 7433.05 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 952.3 MB in the end (delta: 164.8 MB). Peak memory consumption was 164.8 MB. Max. memory is 11.5 GB. [2019-11-20 10:50:52,958 INFO L168 Benchmark]: Witness Printer took 64.94 ms. Allocated memory is still 1.2 GB. Free memory was 952.3 MB in the beginning and 946.9 MB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2019-11-20 10:50:52,960 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 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 422.28 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 140.5 MB). Free memory was 944.7 MB in the beginning and 1.1 GB in the end (delta: -190.7 MB). Peak memory consumption was 22.9 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 61.94 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 281.53 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: 18.3 MB). Peak memory consumption was 18.3 MB. Max. memory is 11.5 GB. * TraceAbstraction took 7433.05 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 952.3 MB in the end (delta: 164.8 MB). Peak memory consumption was 164.8 MB. Max. memory is 11.5 GB. * Witness Printer took 64.94 ms. Allocated memory is still 1.2 GB. Free memory was 952.3 MB in the beginning and 946.9 MB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 20]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 22]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 22]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - AllSpecificationsHoldResult: All specifications hold 3 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 3 error locations. Result: SAFE, OverallTime: 7.3s, OverallIterations: 5, TraceHistogramMax: 6, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 66 SDtfs, 27 SDslu, 116 SDs, 0 SdLazy, 94 SolverSat, 20 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 129 GetRequests, 87 SyntacticMatches, 14 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 4.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=21occurred in iteration=4, 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, 5 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 5.1s InterpolantComputationTime, 64 NumberOfCodeBlocks, 58 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 118 ConstructedInterpolants, 12 QuantifiedInterpolants, 7820 SizeOfPredicates, 3 NumberOfNonLiveVariables, 193 ConjunctsInSsa, 20 ConjunctsInUnsatCore, 10 InterpolantComputations, 8 PerfectInterpolantSequences, 42/48 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...