./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety-ext3/derefAfterFree2.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_d0e54d8d-5133-4a07-963c-e5396f8440fd/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_d0e54d8d-5133-4a07-963c-e5396f8440fd/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_d0e54d8d-5133-4a07-963c-e5396f8440fd/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_d0e54d8d-5133-4a07-963c-e5396f8440fd/bin/uautomizer/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-ext3/derefAfterFree2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_d0e54d8d-5133-4a07-963c-e5396f8440fd/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_d0e54d8d-5133-4a07-963c-e5396f8440fd/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 44834c55142a76240cb3980fc2bb6f5aeaa27c83 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(valid-deref) --- Real Ultimate output --- Skipped default analysis because property is memsafety ### Bit-precise run ### This is Ultimate 0.1.24-678e011 [2019-11-20 02:49:46,482 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-20 02:49:46,483 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-20 02:49:46,493 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-20 02:49:46,494 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-20 02:49:46,495 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-20 02:49:46,496 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-20 02:49:46,498 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-20 02:49:46,500 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-20 02:49:46,500 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-20 02:49:46,506 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-20 02:49:46,507 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-20 02:49:46,507 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-20 02:49:46,508 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-20 02:49:46,509 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-20 02:49:46,510 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-20 02:49:46,511 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-20 02:49:46,511 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-20 02:49:46,513 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-20 02:49:46,515 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-20 02:49:46,516 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-20 02:49:46,520 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-20 02:49:46,523 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-20 02:49:46,524 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-20 02:49:46,529 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-20 02:49:46,531 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-20 02:49:46,531 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-20 02:49:46,533 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-20 02:49:46,533 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-20 02:49:46,535 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-20 02:49:46,535 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-20 02:49:46,536 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-20 02:49:46,536 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-20 02:49:46,537 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-20 02:49:46,540 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-20 02:49:46,540 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-20 02:49:46,540 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-20 02:49:46,541 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-20 02:49:46,541 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-20 02:49:46,542 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-20 02:49:46,543 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-20 02:49:46,544 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_d0e54d8d-5133-4a07-963c-e5396f8440fd/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2019-11-20 02:49:46,571 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-20 02:49:46,571 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-20 02:49:46,572 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-20 02:49:46,572 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-20 02:49:46,572 INFO L138 SettingsManager]: * Use SBE=true [2019-11-20 02:49:46,573 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-20 02:49:46,580 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-20 02:49:46,581 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-11-20 02:49:46,581 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-20 02:49:46,581 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-20 02:49:46,581 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-20 02:49:46,581 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2019-11-20 02:49:46,581 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2019-11-20 02:49:46,582 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2019-11-20 02:49:46,582 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-20 02:49:46,582 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2019-11-20 02:49:46,582 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2019-11-20 02:49:46,582 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-20 02:49:46,582 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-20 02:49:46,583 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-20 02:49:46,583 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-20 02:49:46,583 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-20 02:49:46,583 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-20 02:49:46,583 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-20 02:49:46,584 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-20 02:49:46,584 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-20 02:49:46,584 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2019-11-20 02:49:46,584 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2019-11-20 02:49:46,584 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-20 02:49:46,584 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_d0e54d8d-5133-4a07-963c-e5396f8440fd/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 -> 44834c55142a76240cb3980fc2bb6f5aeaa27c83 [2019-11-20 02:49:46,741 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-20 02:49:46,752 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-20 02:49:46,755 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-20 02:49:46,756 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-20 02:49:46,757 INFO L275 PluginConnector]: CDTParser initialized [2019-11-20 02:49:46,757 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_d0e54d8d-5133-4a07-963c-e5396f8440fd/bin/uautomizer/../../sv-benchmarks/c/memsafety-ext3/derefAfterFree2.c [2019-11-20 02:49:46,812 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_d0e54d8d-5133-4a07-963c-e5396f8440fd/bin/uautomizer/data/c9b1719f3/d83c22365d4a48e38aa3033508cd5026/FLAG1da151751 [2019-11-20 02:49:47,173 INFO L306 CDTParser]: Found 1 translation units. [2019-11-20 02:49:47,174 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_d0e54d8d-5133-4a07-963c-e5396f8440fd/sv-benchmarks/c/memsafety-ext3/derefAfterFree2.c [2019-11-20 02:49:47,179 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_d0e54d8d-5133-4a07-963c-e5396f8440fd/bin/uautomizer/data/c9b1719f3/d83c22365d4a48e38aa3033508cd5026/FLAG1da151751 [2019-11-20 02:49:47,549 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_d0e54d8d-5133-4a07-963c-e5396f8440fd/bin/uautomizer/data/c9b1719f3/d83c22365d4a48e38aa3033508cd5026 [2019-11-20 02:49:47,551 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-20 02:49:47,552 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-20 02:49:47,553 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-20 02:49:47,553 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-20 02:49:47,556 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-20 02:49:47,556 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 02:49:47" (1/1) ... [2019-11-20 02:49:47,559 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@182f8492 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:49:47, skipping insertion in model container [2019-11-20 02:49:47,559 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 02:49:47" (1/1) ... [2019-11-20 02:49:47,565 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-20 02:49:47,578 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-20 02:49:47,730 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 02:49:47,819 INFO L188 MainTranslator]: Completed pre-run [2019-11-20 02:49:47,838 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 02:49:47,854 INFO L192 MainTranslator]: Completed translation [2019-11-20 02:49:47,855 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:49:47 WrapperNode [2019-11-20 02:49:47,855 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-20 02:49:47,856 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-20 02:49:47,856 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-20 02:49:47,856 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-20 02:49:47,867 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:49:47" (1/1) ... [2019-11-20 02:49:47,868 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:49:47" (1/1) ... [2019-11-20 02:49:47,875 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:49:47" (1/1) ... [2019-11-20 02:49:47,875 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:49:47" (1/1) ... [2019-11-20 02:49:47,884 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:49:47" (1/1) ... [2019-11-20 02:49:47,887 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:49:47" (1/1) ... [2019-11-20 02:49:47,888 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:49:47" (1/1) ... [2019-11-20 02:49:47,893 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-20 02:49:47,893 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-20 02:49:47,893 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-20 02:49:47,894 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-20 02:49:47,894 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:49:47" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d0e54d8d-5133-4a07-963c-e5396f8440fd/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 02:49:47,948 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-20 02:49:47,948 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-20 02:49:47,949 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-20 02:49:47,949 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-11-20 02:49:47,949 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-11-20 02:49:47,949 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-20 02:49:47,949 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-20 02:49:47,950 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2019-11-20 02:49:47,950 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-20 02:49:47,950 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-20 02:49:47,950 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-20 02:49:47,950 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2019-11-20 02:49:48,130 INFO L280 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-20 02:49:48,130 INFO L285 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-20 02:49:48,131 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 02:49:48 BoogieIcfgContainer [2019-11-20 02:49:48,132 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-20 02:49:48,133 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-20 02:49:48,133 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-20 02:49:48,135 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-20 02:49:48,135 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 02:49:47" (1/3) ... [2019-11-20 02:49:48,136 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18a2d858 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 02:49:48, skipping insertion in model container [2019-11-20 02:49:48,137 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:49:47" (2/3) ... [2019-11-20 02:49:48,137 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18a2d858 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 02:49:48, skipping insertion in model container [2019-11-20 02:49:48,137 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 02:49:48" (3/3) ... [2019-11-20 02:49:48,138 INFO L109 eAbstractionObserver]: Analyzing ICFG derefAfterFree2.c [2019-11-20 02:49:48,147 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-20 02:49:48,152 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 6 error locations. [2019-11-20 02:49:48,162 INFO L249 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2019-11-20 02:49:48,179 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-20 02:49:48,179 INFO L374 AbstractCegarLoop]: Hoare is false [2019-11-20 02:49:48,179 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-20 02:49:48,179 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-20 02:49:48,179 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-20 02:49:48,179 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-20 02:49:48,180 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-20 02:49:48,180 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-20 02:49:48,192 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2019-11-20 02:49:48,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-20 02:49:48,200 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 02:49:48,201 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 02:49:48,201 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr3ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr5ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION]=== [2019-11-20 02:49:48,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 02:49:48,206 INFO L82 PathProgramCache]: Analyzing trace with hash 868112163, now seen corresponding path program 1 times [2019-11-20 02:49:48,222 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 02:49:48,222 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [830005543] [2019-11-20 02:49:48,222 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d0e54d8d-5133-4a07-963c-e5396f8440fd/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 02:49:48,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:49:48,397 INFO L255 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-20 02:49:48,401 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 02:49:48,463 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 02:49:48,463 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 02:49:48,478 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 02:49:48,478 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 02:49:48,478 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2019-11-20 02:49:48,508 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 02:49:48,508 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 02:49:48,587 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 02:49:48,588 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [830005543] [2019-11-20 02:49:48,589 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 02:49:48,589 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2019-11-20 02:49:48,590 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917346767] [2019-11-20 02:49:48,593 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-20 02:49:48,593 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 02:49:48,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-20 02:49:48,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-20 02:49:48,604 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 4 states. [2019-11-20 02:49:48,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 02:49:48,829 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2019-11-20 02:49:48,830 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-20 02:49:48,831 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2019-11-20 02:49:48,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 02:49:48,839 INFO L225 Difference]: With dead ends: 36 [2019-11-20 02:49:48,840 INFO L226 Difference]: Without dead ends: 32 [2019-11-20 02:49:48,846 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 [2019-11-20 02:49:48,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-11-20 02:49:48,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 27. [2019-11-20 02:49:48,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-11-20 02:49:48,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2019-11-20 02:49:48,880 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 8 [2019-11-20 02:49:48,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 02:49:48,880 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2019-11-20 02:49:48,880 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-20 02:49:48,881 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2019-11-20 02:49:48,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-20 02:49:48,881 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 02:49:48,881 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 02:49:49,083 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 02:49:49,085 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr3ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr5ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION]=== [2019-11-20 02:49:49,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 02:49:49,085 INFO L82 PathProgramCache]: Analyzing trace with hash 868112162, now seen corresponding path program 1 times [2019-11-20 02:49:49,085 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 02:49:49,086 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [2129971349] [2019-11-20 02:49:49,086 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d0e54d8d-5133-4a07-963c-e5396f8440fd/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 02:49:49,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:49:49,132 INFO L255 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-20 02:49:49,133 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 02:49:49,138 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 02:49:49,139 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 02:49:49,140 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 02:49:49,141 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 02:49:49,141 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2019-11-20 02:49:49,148 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 02:49:49,148 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 02:49:49,157 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 02:49:49,157 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2129971349] [2019-11-20 02:49:49,157 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 02:49:49,158 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2019-11-20 02:49:49,158 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968358520] [2019-11-20 02:49:49,159 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-20 02:49:49,159 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 02:49:49,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-20 02:49:49,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-20 02:49:49,160 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 3 states. [2019-11-20 02:49:49,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 02:49:49,193 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2019-11-20 02:49:49,193 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-20 02:49:49,193 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2019-11-20 02:49:49,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 02:49:49,196 INFO L225 Difference]: With dead ends: 33 [2019-11-20 02:49:49,197 INFO L226 Difference]: Without dead ends: 33 [2019-11-20 02:49:49,197 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 [2019-11-20 02:49:49,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-11-20 02:49:49,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 29. [2019-11-20 02:49:49,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-11-20 02:49:49,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2019-11-20 02:49:49,202 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 8 [2019-11-20 02:49:49,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 02:49:49,202 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2019-11-20 02:49:49,202 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-20 02:49:49,202 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2019-11-20 02:49:49,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-20 02:49:49,203 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 02:49:49,203 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 02:49:49,404 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 02:49:49,404 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr3ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr5ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION]=== [2019-11-20 02:49:49,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 02:49:49,404 INFO L82 PathProgramCache]: Analyzing trace with hash 578407498, now seen corresponding path program 1 times [2019-11-20 02:49:49,405 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 02:49:49,405 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1487050814] [2019-11-20 02:49:49,405 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d0e54d8d-5133-4a07-963c-e5396f8440fd/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 02:49:49,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:49:49,467 INFO L255 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-20 02:49:49,469 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 02:49:49,489 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 02:49:49,489 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 02:49:49,529 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 02:49:49,530 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1487050814] [2019-11-20 02:49:49,530 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 02:49:49,530 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2019-11-20 02:49:49,530 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491463272] [2019-11-20 02:49:49,531 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-20 02:49:49,531 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 02:49:49,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-20 02:49:49,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-11-20 02:49:49,532 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 6 states. [2019-11-20 02:49:49,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 02:49:49,666 INFO L93 Difference]: Finished difference Result 37 states and 40 transitions. [2019-11-20 02:49:49,666 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-20 02:49:49,666 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2019-11-20 02:49:49,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 02:49:49,667 INFO L225 Difference]: With dead ends: 37 [2019-11-20 02:49:49,667 INFO L226 Difference]: Without dead ends: 37 [2019-11-20 02:49:49,668 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 21 SyntacticMatches, 0 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 02:49:49,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-11-20 02:49:49,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2019-11-20 02:49:49,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-11-20 02:49:49,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2019-11-20 02:49:49,673 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 13 [2019-11-20 02:49:49,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 02:49:49,673 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2019-11-20 02:49:49,673 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-20 02:49:49,673 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2019-11-20 02:49:49,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-20 02:49:49,674 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 02:49:49,674 INFO L410 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 02:49:49,881 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 02:49:49,881 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr3ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr5ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION]=== [2019-11-20 02:49:49,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 02:49:49,882 INFO L82 PathProgramCache]: Analyzing trace with hash -31517271, now seen corresponding path program 1 times [2019-11-20 02:49:49,882 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 02:49:49,882 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [57096929] [2019-11-20 02:49:49,882 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d0e54d8d-5133-4a07-963c-e5396f8440fd/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 02:49:49,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:49:49,949 INFO L255 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-20 02:49:49,951 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 02:49:49,958 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 02:49:49,958 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 02:49:49,964 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 02:49:49,964 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 02:49:49,965 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2019-11-20 02:49:50,037 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 02:49:50,037 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 02:49:50,639 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 02:49:50,639 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [57096929] [2019-11-20 02:49:50,639 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 02:49:50,640 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2019-11-20 02:49:50,640 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078786412] [2019-11-20 02:49:50,640 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-20 02:49:50,640 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 02:49:50,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-20 02:49:50,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2019-11-20 02:49:50,641 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand 9 states. [2019-11-20 02:49:50,902 WARN L191 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 18 [2019-11-20 02:49:51,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 02:49:51,435 INFO L93 Difference]: Finished difference Result 69 states and 73 transitions. [2019-11-20 02:49:51,436 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-20 02:49:51,436 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2019-11-20 02:49:51,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 02:49:51,438 INFO L225 Difference]: With dead ends: 69 [2019-11-20 02:49:51,438 INFO L226 Difference]: Without dead ends: 69 [2019-11-20 02:49:51,439 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2019-11-20 02:49:51,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2019-11-20 02:49:51,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 57. [2019-11-20 02:49:51,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-11-20 02:49:51,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 69 transitions. [2019-11-20 02:49:51,447 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 69 transitions. Word has length 16 [2019-11-20 02:49:51,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 02:49:51,448 INFO L462 AbstractCegarLoop]: Abstraction has 57 states and 69 transitions. [2019-11-20 02:49:51,448 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-20 02:49:51,448 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 69 transitions. [2019-11-20 02:49:51,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-11-20 02:49:51,449 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 02:49:51,449 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 02:49:51,650 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 02:49:51,651 INFO L410 AbstractCegarLoop]: === Iteration 5 === [mainErr3ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr5ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION]=== [2019-11-20 02:49:51,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 02:49:51,651 INFO L82 PathProgramCache]: Analyzing trace with hash 1067294347, now seen corresponding path program 1 times [2019-11-20 02:49:51,652 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 02:49:51,652 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1073367104] [2019-11-20 02:49:51,652 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d0e54d8d-5133-4a07-963c-e5396f8440fd/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 02:49:51,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:49:51,710 INFO L255 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-20 02:49:51,713 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 02:49:51,723 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 02:49:51,724 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 02:49:51,735 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 02:49:51,735 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1073367104] [2019-11-20 02:49:51,735 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 02:49:51,736 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2019-11-20 02:49:51,736 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908775002] [2019-11-20 02:49:51,736 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-20 02:49:51,737 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 02:49:51,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-20 02:49:51,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-20 02:49:51,737 INFO L87 Difference]: Start difference. First operand 57 states and 69 transitions. Second operand 3 states. [2019-11-20 02:49:51,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 02:49:51,750 INFO L93 Difference]: Finished difference Result 56 states and 66 transitions. [2019-11-20 02:49:51,752 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-20 02:49:51,752 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2019-11-20 02:49:51,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 02:49:51,753 INFO L225 Difference]: With dead ends: 56 [2019-11-20 02:49:51,753 INFO L226 Difference]: Without dead ends: 56 [2019-11-20 02:49:51,753 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 42 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 02:49:51,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-11-20 02:49:51,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2019-11-20 02:49:51,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2019-11-20 02:49:51,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 66 transitions. [2019-11-20 02:49:51,760 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 66 transitions. Word has length 22 [2019-11-20 02:49:51,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 02:49:51,760 INFO L462 AbstractCegarLoop]: Abstraction has 56 states and 66 transitions. [2019-11-20 02:49:51,760 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-20 02:49:51,760 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 66 transitions. [2019-11-20 02:49:51,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-20 02:49:51,761 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 02:49:51,761 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 02:49:51,963 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 02:49:51,963 INFO L410 AbstractCegarLoop]: === Iteration 6 === [mainErr3ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr5ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION]=== [2019-11-20 02:49:51,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 02:49:51,964 INFO L82 PathProgramCache]: Analyzing trace with hash -1273613558, now seen corresponding path program 1 times [2019-11-20 02:49:51,964 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 02:49:51,964 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1477987278] [2019-11-20 02:49:51,964 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d0e54d8d-5133-4a07-963c-e5396f8440fd/bin/uautomizer/cvc4 Starting monitored process 7 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 02:49:52,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:49:52,019 INFO L255 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-20 02:49:52,020 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 02:49:52,046 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 02:49:52,047 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 02:49:52,105 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 02:49:52,106 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1477987278] [2019-11-20 02:49:52,106 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 02:49:52,106 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2019-11-20 02:49:52,106 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988284016] [2019-11-20 02:49:52,107 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-20 02:49:52,107 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 02:49:52,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-20 02:49:52,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2019-11-20 02:49:52,107 INFO L87 Difference]: Start difference. First operand 56 states and 66 transitions. Second operand 10 states. [2019-11-20 02:49:52,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 02:49:52,369 INFO L93 Difference]: Finished difference Result 57 states and 63 transitions. [2019-11-20 02:49:52,373 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-20 02:49:52,373 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 23 [2019-11-20 02:49:52,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 02:49:52,374 INFO L225 Difference]: With dead ends: 57 [2019-11-20 02:49:52,374 INFO L226 Difference]: Without dead ends: 57 [2019-11-20 02:49:52,374 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2019-11-20 02:49:52,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2019-11-20 02:49:52,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 54. [2019-11-20 02:49:52,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-11-20 02:49:52,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 63 transitions. [2019-11-20 02:49:52,383 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 63 transitions. Word has length 23 [2019-11-20 02:49:52,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 02:49:52,384 INFO L462 AbstractCegarLoop]: Abstraction has 54 states and 63 transitions. [2019-11-20 02:49:52,384 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-20 02:49:52,384 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 63 transitions. [2019-11-20 02:49:52,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-11-20 02:49:52,385 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 02:49:52,385 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 02:49:52,587 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 02:49:52,587 INFO L410 AbstractCegarLoop]: === Iteration 7 === [mainErr3ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr5ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION]=== [2019-11-20 02:49:52,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 02:49:52,588 INFO L82 PathProgramCache]: Analyzing trace with hash 130667105, now seen corresponding path program 2 times [2019-11-20 02:49:52,588 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 02:49:52,588 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1692776323] [2019-11-20 02:49:52,588 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d0e54d8d-5133-4a07-963c-e5396f8440fd/bin/uautomizer/cvc4 Starting monitored process 8 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 02:49:52,673 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-20 02:49:52,673 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 02:49:52,674 INFO L255 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-20 02:49:52,676 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 02:49:52,712 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 02:49:52,712 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 02:49:52,821 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 02:49:52,821 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1692776323] [2019-11-20 02:49:52,821 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 02:49:52,821 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2019-11-20 02:49:52,822 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997231696] [2019-11-20 02:49:52,822 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-20 02:49:52,822 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 02:49:52,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-20 02:49:52,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2019-11-20 02:49:52,823 INFO L87 Difference]: Start difference. First operand 54 states and 63 transitions. Second operand 12 states. [2019-11-20 02:49:53,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 02:49:53,285 INFO L93 Difference]: Finished difference Result 71 states and 77 transitions. [2019-11-20 02:49:53,286 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-20 02:49:53,286 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 25 [2019-11-20 02:49:53,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 02:49:53,287 INFO L225 Difference]: With dead ends: 71 [2019-11-20 02:49:53,287 INFO L226 Difference]: Without dead ends: 71 [2019-11-20 02:49:53,287 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=94, Invalid=146, Unknown=0, NotChecked=0, Total=240 [2019-11-20 02:49:53,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2019-11-20 02:49:53,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 68. [2019-11-20 02:49:53,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2019-11-20 02:49:53,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 77 transitions. [2019-11-20 02:49:53,292 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 77 transitions. Word has length 25 [2019-11-20 02:49:53,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 02:49:53,293 INFO L462 AbstractCegarLoop]: Abstraction has 68 states and 77 transitions. [2019-11-20 02:49:53,293 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-20 02:49:53,293 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 77 transitions. [2019-11-20 02:49:53,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-11-20 02:49:53,294 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 02:49:53,294 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 02:49:53,494 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 02:49:53,495 INFO L410 AbstractCegarLoop]: === Iteration 8 === [mainErr3ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr5ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION]=== [2019-11-20 02:49:53,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 02:49:53,495 INFO L82 PathProgramCache]: Analyzing trace with hash 851171268, now seen corresponding path program 2 times [2019-11-20 02:49:53,495 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 02:49:53,495 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [412818220] [2019-11-20 02:49:53,496 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d0e54d8d-5133-4a07-963c-e5396f8440fd/bin/uautomizer/cvc4 Starting monitored process 9 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 02:49:53,554 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2019-11-20 02:49:53,554 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 02:49:53,555 INFO L255 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-20 02:49:53,557 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 02:49:53,589 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2019-11-20 02:49:53,590 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 02:49:53,609 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2019-11-20 02:49:53,610 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [412818220] [2019-11-20 02:49:53,610 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 02:49:53,610 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 2] imperfect sequences [] total 4 [2019-11-20 02:49:53,610 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066329163] [2019-11-20 02:49:53,610 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-20 02:49:53,610 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 02:49:53,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-20 02:49:53,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-20 02:49:53,611 INFO L87 Difference]: Start difference. First operand 68 states and 77 transitions. Second operand 5 states. [2019-11-20 02:49:53,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 02:49:53,641 INFO L93 Difference]: Finished difference Result 67 states and 76 transitions. [2019-11-20 02:49:53,642 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-20 02:49:53,642 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 31 [2019-11-20 02:49:53,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 02:49:53,643 INFO L225 Difference]: With dead ends: 67 [2019-11-20 02:49:53,643 INFO L226 Difference]: Without dead ends: 67 [2019-11-20 02:49:53,644 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-20 02:49:53,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-11-20 02:49:53,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2019-11-20 02:49:53,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2019-11-20 02:49:53,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 76 transitions. [2019-11-20 02:49:53,648 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 76 transitions. Word has length 31 [2019-11-20 02:49:53,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 02:49:53,649 INFO L462 AbstractCegarLoop]: Abstraction has 67 states and 76 transitions. [2019-11-20 02:49:53,649 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-20 02:49:53,649 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 76 transitions. [2019-11-20 02:49:53,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-11-20 02:49:53,650 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 02:49:53,650 INFO L410 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 02:49:53,851 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 02:49:53,851 INFO L410 AbstractCegarLoop]: === Iteration 9 === [mainErr3ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr5ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION]=== [2019-11-20 02:49:53,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 02:49:53,852 INFO L82 PathProgramCache]: Analyzing trace with hash 616751285, now seen corresponding path program 2 times [2019-11-20 02:49:53,852 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 02:49:53,852 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1944638035] [2019-11-20 02:49:53,852 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d0e54d8d-5133-4a07-963c-e5396f8440fd/bin/uautomizer/cvc4 Starting monitored process 10 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 02:49:53,925 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-20 02:49:53,925 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 02:49:53,927 INFO L255 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-20 02:49:53,928 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 02:49:53,979 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 17 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 02:49:53,979 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 02:49:54,009 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 17 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 02:49:54,010 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1944638035] [2019-11-20 02:49:54,010 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 02:49:54,010 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2019-11-20 02:49:54,010 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459195373] [2019-11-20 02:49:54,011 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-20 02:49:54,011 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 02:49:54,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-20 02:49:54,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2019-11-20 02:49:54,011 INFO L87 Difference]: Start difference. First operand 67 states and 76 transitions. Second operand 8 states. [2019-11-20 02:49:54,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 02:49:54,175 INFO L93 Difference]: Finished difference Result 55 states and 59 transitions. [2019-11-20 02:49:54,176 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-20 02:49:54,176 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 32 [2019-11-20 02:49:54,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 02:49:54,177 INFO L225 Difference]: With dead ends: 55 [2019-11-20 02:49:54,177 INFO L226 Difference]: Without dead ends: 55 [2019-11-20 02:49:54,177 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 54 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2019-11-20 02:49:54,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-11-20 02:49:54,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2019-11-20 02:49:54,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2019-11-20 02:49:54,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 59 transitions. [2019-11-20 02:49:54,181 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 59 transitions. Word has length 32 [2019-11-20 02:49:54,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 02:49:54,181 INFO L462 AbstractCegarLoop]: Abstraction has 55 states and 59 transitions. [2019-11-20 02:49:54,181 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-20 02:49:54,181 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 59 transitions. [2019-11-20 02:49:54,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-11-20 02:49:54,182 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 02:49:54,182 INFO L410 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 02:49:54,384 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 02:49:54,384 INFO L410 AbstractCegarLoop]: === Iteration 10 === [mainErr3ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr5ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION]=== [2019-11-20 02:49:54,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 02:49:54,384 INFO L82 PathProgramCache]: Analyzing trace with hash 1037842700, now seen corresponding path program 1 times [2019-11-20 02:49:54,385 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 02:49:54,385 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [659595360] [2019-11-20 02:49:54,385 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d0e54d8d-5133-4a07-963c-e5396f8440fd/bin/uautomizer/cvc4 Starting monitored process 11 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 02:49:54,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:49:54,496 INFO L255 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-20 02:49:54,498 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 02:49:54,505 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 02:49:54,505 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 02:49:54,513 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 02:49:54,513 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 02:49:54,513 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2019-11-20 02:49:54,610 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 02:49:54,610 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 02:49:55,840 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 02:49:55,841 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [659595360] [2019-11-20 02:49:55,841 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 02:49:55,841 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 16 [2019-11-20 02:49:55,841 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293392884] [2019-11-20 02:49:55,841 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-20 02:49:55,841 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 02:49:55,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-20 02:49:55,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2019-11-20 02:49:55,842 INFO L87 Difference]: Start difference. First operand 55 states and 59 transitions. Second operand 17 states. [2019-11-20 02:49:56,329 WARN L191 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 18 [2019-11-20 02:49:56,637 WARN L191 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 17 [2019-11-20 02:49:56,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 02:49:56,834 INFO L93 Difference]: Finished difference Result 74 states and 78 transitions. [2019-11-20 02:49:56,835 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-20 02:49:56,835 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 35 [2019-11-20 02:49:56,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 02:49:56,836 INFO L225 Difference]: With dead ends: 74 [2019-11-20 02:49:56,836 INFO L226 Difference]: Without dead ends: 74 [2019-11-20 02:49:56,836 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=103, Invalid=239, Unknown=0, NotChecked=0, Total=342 [2019-11-20 02:49:56,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2019-11-20 02:49:56,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2019-11-20 02:49:56,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2019-11-20 02:49:56,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 78 transitions. [2019-11-20 02:49:56,841 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 78 transitions. Word has length 35 [2019-11-20 02:49:56,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 02:49:56,841 INFO L462 AbstractCegarLoop]: Abstraction has 73 states and 78 transitions. [2019-11-20 02:49:56,841 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-20 02:49:56,841 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 78 transitions. [2019-11-20 02:49:56,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-11-20 02:49:56,842 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 02:49:56,842 INFO L410 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 02:49:57,044 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 02:49:57,045 INFO L410 AbstractCegarLoop]: === Iteration 11 === [mainErr3ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr5ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION]=== [2019-11-20 02:49:57,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 02:49:57,045 INFO L82 PathProgramCache]: Analyzing trace with hash 1037842699, now seen corresponding path program 1 times [2019-11-20 02:49:57,046 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 02:49:57,046 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1409638832] [2019-11-20 02:49:57,046 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d0e54d8d-5133-4a07-963c-e5396f8440fd/bin/uautomizer/cvc4 Starting monitored process 12 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 02:49:57,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 02:49:57,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 02:49:57,360 INFO L174 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2019-11-20 02:49:57,360 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-20 02:49:57,560 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 02:49:57,585 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.11 02:49:57 BoogieIcfgContainer [2019-11-20 02:49:57,585 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-20 02:49:57,586 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-20 02:49:57,586 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-20 02:49:57,586 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-20 02:49:57,587 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 02:49:48" (3/4) ... [2019-11-20 02:49:57,588 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-11-20 02:49:57,642 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_d0e54d8d-5133-4a07-963c-e5396f8440fd/bin/uautomizer/witness.graphml [2019-11-20 02:49:57,642 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-20 02:49:57,643 INFO L168 Benchmark]: Toolchain (without parser) took 10091.50 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 143.1 MB). Free memory was 950.1 MB in the beginning and 930.0 MB in the end (delta: 20.1 MB). Peak memory consumption was 163.2 MB. Max. memory is 11.5 GB. [2019-11-20 02:49:57,644 INFO L168 Benchmark]: CDTParser took 0.78 ms. Allocated memory is still 1.0 GB. Free memory is still 967.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-20 02:49:57,644 INFO L168 Benchmark]: CACSL2BoogieTranslator took 302.90 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 143.1 MB). Free memory was 950.1 MB in the beginning and 1.1 GB in the end (delta: -186.5 MB). Peak memory consumption was 23.2 MB. Max. memory is 11.5 GB. [2019-11-20 02:49:57,645 INFO L168 Benchmark]: Boogie Preprocessor took 37.04 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 02:49:57,645 INFO L168 Benchmark]: RCFGBuilder took 238.62 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: 17.0 MB). Peak memory consumption was 17.0 MB. Max. memory is 11.5 GB. [2019-11-20 02:49:57,646 INFO L168 Benchmark]: TraceAbstraction took 9452.89 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 931.8 MB in the end (delta: 182.5 MB). Peak memory consumption was 182.5 MB. Max. memory is 11.5 GB. [2019-11-20 02:49:57,646 INFO L168 Benchmark]: Witness Printer took 56.46 ms. Allocated memory is still 1.2 GB. Free memory was 931.8 MB in the beginning and 930.0 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 11.5 GB. [2019-11-20 02:49:57,648 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.78 ms. Allocated memory is still 1.0 GB. Free memory is still 967.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 302.90 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 143.1 MB). Free memory was 950.1 MB in the beginning and 1.1 GB in the end (delta: -186.5 MB). Peak memory consumption was 23.2 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 37.04 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 238.62 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: 17.0 MB). Peak memory consumption was 17.0 MB. Max. memory is 11.5 GB. * TraceAbstraction took 9452.89 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 931.8 MB in the end (delta: 182.5 MB). Peak memory consumption was 182.5 MB. Max. memory is 11.5 GB. * Witness Printer took 56.46 ms. Allocated memory is still 1.2 GB. Free memory was 931.8 MB in the beginning and 930.0 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 9]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L6] int* p = malloc(10 * sizeof(int)); [L8] int i = 0; VAL [i=0, malloc(10 * sizeof(int))={2:0}, p={2:0}] [L8] COND TRUE i < 10 VAL [i=0, malloc(10 * sizeof(int))={2:0}, p={2:0}] [L9] p[i] = 1 VAL [i=0, malloc(10 * sizeof(int))={2:0}, p={2:0}] [L10] COND FALSE !(i == 5) VAL [i=0, malloc(10 * sizeof(int))={2:0}, p={2:0}] [L8] i++ VAL [i=1, malloc(10 * sizeof(int))={2:0}, p={2:0}] [L8] COND TRUE i < 10 VAL [i=1, malloc(10 * sizeof(int))={2:0}, p={2:0}] [L9] p[i] = 1 VAL [i=1, malloc(10 * sizeof(int))={2:0}, p={2:0}] [L10] COND FALSE !(i == 5) VAL [i=1, malloc(10 * sizeof(int))={2:0}, p={2:0}] [L8] i++ VAL [i=2, malloc(10 * sizeof(int))={2:0}, p={2:0}] [L8] COND TRUE i < 10 VAL [i=2, malloc(10 * sizeof(int))={2:0}, p={2:0}] [L9] p[i] = 1 VAL [i=2, malloc(10 * sizeof(int))={2:0}, p={2:0}] [L10] COND FALSE !(i == 5) VAL [i=2, malloc(10 * sizeof(int))={2:0}, p={2:0}] [L8] i++ VAL [i=3, malloc(10 * sizeof(int))={2:0}, p={2:0}] [L8] COND TRUE i < 10 VAL [i=3, malloc(10 * sizeof(int))={2:0}, p={2:0}] [L9] p[i] = 1 VAL [i=3, malloc(10 * sizeof(int))={2:0}, p={2:0}] [L10] COND FALSE !(i == 5) VAL [i=3, malloc(10 * sizeof(int))={2:0}, p={2:0}] [L8] i++ VAL [i=4, malloc(10 * sizeof(int))={2:0}, p={2:0}] [L8] COND TRUE i < 10 VAL [i=4, malloc(10 * sizeof(int))={2:0}, p={2:0}] [L9] p[i] = 1 VAL [i=4, malloc(10 * sizeof(int))={2:0}, p={2:0}] [L10] COND FALSE !(i == 5) VAL [i=4, malloc(10 * sizeof(int))={2:0}, p={2:0}] [L8] i++ VAL [i=5, malloc(10 * sizeof(int))={2:0}, p={2:0}] [L8] COND TRUE i < 10 VAL [i=5, malloc(10 * sizeof(int))={2:0}, p={2:0}] [L9] p[i] = 1 VAL [i=5, malloc(10 * sizeof(int))={2:0}, p={2:0}] [L10] COND TRUE i == 5 VAL [i=5, malloc(10 * sizeof(int))={2:0}, p={2:0}] [L11] free(p) VAL [i=5, malloc(10 * sizeof(int))={2:0}, p={2:0}] [L11] free(p) VAL [i=5, malloc(10 * sizeof(int))={2:0}, p={2:0}] [L11] free(p) [L8] i++ VAL [i=6, malloc(10 * sizeof(int))={2:0}, p={2:0}] [L8] COND TRUE i < 10 VAL [i=6, malloc(10 * sizeof(int))={2:0}, p={2:0}] [L9] p[i] = 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 24 locations, 6 error locations. Result: UNSAFE, OverallTime: 9.4s, OverallIterations: 11, TraceHistogramMax: 7, AutomataDifference: 3.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 132 SDtfs, 348 SDslu, 305 SDs, 0 SdLazy, 864 SolverSat, 76 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 431 GetRequests, 354 SyntacticMatches, 5 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 3.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=73occurred in iteration=10, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 10 MinimizatonAttempts, 29 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 2.7s InterpolantComputationTime, 248 NumberOfCodeBlocks, 228 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 406 ConstructedInterpolants, 0 QuantifiedInterpolants, 77008 SizeOfPredicates, 17 NumberOfNonLiveVariables, 556 ConjunctsInSsa, 59 ConjunctsInUnsatCore, 20 InterpolantComputations, 8 PerfectInterpolantSequences, 186/556 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 incorrect! Received shutdown request...