./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 f470102c Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_151f8883-69a3-4a11-9d8b-0293cbfcc8a8/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_151f8883-69a3-4a11-9d8b-0293cbfcc8a8/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_151f8883-69a3-4a11-9d8b-0293cbfcc8a8/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_151f8883-69a3-4a11-9d8b-0293cbfcc8a8/bin/uautomizer/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-ext3/derefAfterFree2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_151f8883-69a3-4a11-9d8b-0293cbfcc8a8/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_151f8883-69a3-4a11-9d8b-0293cbfcc8a8/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 --- This is Ultimate 0.1.25-f470102 [2019-12-07 16:17:07,547 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-07 16:17:07,548 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-07 16:17:07,555 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-07 16:17:07,556 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-07 16:17:07,556 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-07 16:17:07,557 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-07 16:17:07,558 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-07 16:17:07,560 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-07 16:17:07,560 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-07 16:17:07,561 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-07 16:17:07,562 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-07 16:17:07,562 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-07 16:17:07,563 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-07 16:17:07,563 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-07 16:17:07,564 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-07 16:17:07,565 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-07 16:17:07,565 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-07 16:17:07,566 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-07 16:17:07,568 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-07 16:17:07,569 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-07 16:17:07,569 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-07 16:17:07,570 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-07 16:17:07,570 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-07 16:17:07,572 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-12-07 16:17:07,572 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-12-07 16:17:07,572 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-12-07 16:17:07,573 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-12-07 16:17:07,573 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-12-07 16:17:07,574 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-12-07 16:17:07,574 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-07 16:17:07,574 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-07 16:17:07,575 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-07 16:17:07,575 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-07 16:17:07,576 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-07 16:17:07,576 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-07 16:17:07,576 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-07 16:17:07,576 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-07 16:17:07,576 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-07 16:17:07,577 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-07 16:17:07,577 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-07 16:17:07,578 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_151f8883-69a3-4a11-9d8b-0293cbfcc8a8/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2019-12-07 16:17:07,587 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-07 16:17:07,587 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-07 16:17:07,588 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-12-07 16:17:07,588 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-12-07 16:17:07,588 INFO L138 SettingsManager]: * Use SBE=true [2019-12-07 16:17:07,589 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-07 16:17:07,589 INFO L138 SettingsManager]: * sizeof long=4 [2019-12-07 16:17:07,589 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-12-07 16:17:07,589 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-12-07 16:17:07,589 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-12-07 16:17:07,589 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-07 16:17:07,589 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2019-12-07 16:17:07,589 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2019-12-07 16:17:07,589 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2019-12-07 16:17:07,590 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-12-07 16:17:07,590 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-12-07 16:17:07,590 INFO L138 SettingsManager]: * sizeof long double=12 [2019-12-07 16:17:07,590 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-07 16:17:07,590 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-07 16:17:07,590 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-12-07 16:17:07,590 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-12-07 16:17:07,590 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-12-07 16:17:07,591 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-07 16:17:07,591 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-07 16:17:07,591 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-12-07 16:17:07,591 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-12-07 16:17:07,591 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-12-07 16:17:07,591 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-12-07 16:17:07,591 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_151f8883-69a3-4a11-9d8b-0293cbfcc8a8/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 [2019-12-07 16:17:07,689 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-07 16:17:07,697 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-07 16:17:07,699 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-07 16:17:07,700 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-07 16:17:07,700 INFO L275 PluginConnector]: CDTParser initialized [2019-12-07 16:17:07,701 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_151f8883-69a3-4a11-9d8b-0293cbfcc8a8/bin/uautomizer/../../sv-benchmarks/c/memsafety-ext3/derefAfterFree2.c [2019-12-07 16:17:07,736 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_151f8883-69a3-4a11-9d8b-0293cbfcc8a8/bin/uautomizer/data/29bcae06f/e3b474bf8b8b4c43a084c9ea2972a8a9/FLAGe26af1767 [2019-12-07 16:17:08,030 INFO L306 CDTParser]: Found 1 translation units. [2019-12-07 16:17:08,031 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_151f8883-69a3-4a11-9d8b-0293cbfcc8a8/sv-benchmarks/c/memsafety-ext3/derefAfterFree2.c [2019-12-07 16:17:08,034 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_151f8883-69a3-4a11-9d8b-0293cbfcc8a8/bin/uautomizer/data/29bcae06f/e3b474bf8b8b4c43a084c9ea2972a8a9/FLAGe26af1767 [2019-12-07 16:17:08,043 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_151f8883-69a3-4a11-9d8b-0293cbfcc8a8/bin/uautomizer/data/29bcae06f/e3b474bf8b8b4c43a084c9ea2972a8a9 [2019-12-07 16:17:08,045 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-07 16:17:08,045 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-12-07 16:17:08,046 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-07 16:17:08,046 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-07 16:17:08,048 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-07 16:17:08,049 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 04:17:08" (1/1) ... [2019-12-07 16:17:08,050 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@75aa99db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:17:08, skipping insertion in model container [2019-12-07 16:17:08,051 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 04:17:08" (1/1) ... [2019-12-07 16:17:08,055 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-07 16:17:08,065 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-07 16:17:08,196 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 16:17:08,204 INFO L203 MainTranslator]: Completed pre-run [2019-12-07 16:17:08,214 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 16:17:08,223 INFO L208 MainTranslator]: Completed translation [2019-12-07 16:17:08,224 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:17:08 WrapperNode [2019-12-07 16:17:08,224 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-07 16:17:08,224 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-07 16:17:08,225 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-07 16:17:08,225 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-07 16:17:08,236 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:17:08" (1/1) ... [2019-12-07 16:17:08,236 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:17:08" (1/1) ... [2019-12-07 16:17:08,242 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:17:08" (1/1) ... [2019-12-07 16:17:08,242 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:17:08" (1/1) ... [2019-12-07 16:17:08,246 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:17:08" (1/1) ... [2019-12-07 16:17:08,249 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:17:08" (1/1) ... [2019-12-07 16:17:08,249 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:17:08" (1/1) ... [2019-12-07 16:17:08,250 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-07 16:17:08,251 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-07 16:17:08,251 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-07 16:17:08,251 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-07 16:17:08,251 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:17:08" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_151f8883-69a3-4a11-9d8b-0293cbfcc8a8/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 [2019-12-07 16:17:08,289 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-12-07 16:17:08,290 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-07 16:17:08,290 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-12-07 16:17:08,290 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-12-07 16:17:08,290 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-12-07 16:17:08,290 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-12-07 16:17:08,290 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-12-07 16:17:08,290 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-12-07 16:17:08,290 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-12-07 16:17:08,290 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-12-07 16:17:08,290 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-07 16:17:08,290 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-12-07 16:17:08,407 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-07 16:17:08,407 INFO L287 CfgBuilder]: Removed 1 assume(true) statements. [2019-12-07 16:17:08,408 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 04:17:08 BoogieIcfgContainer [2019-12-07 16:17:08,408 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-07 16:17:08,408 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-12-07 16:17:08,409 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-12-07 16:17:08,410 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-12-07 16:17:08,411 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 04:17:08" (1/3) ... [2019-12-07 16:17:08,411 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3be6589c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 04:17:08, skipping insertion in model container [2019-12-07 16:17:08,411 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:17:08" (2/3) ... [2019-12-07 16:17:08,411 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3be6589c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 04:17:08, skipping insertion in model container [2019-12-07 16:17:08,412 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 04:17:08" (3/3) ... [2019-12-07 16:17:08,412 INFO L109 eAbstractionObserver]: Analyzing ICFG derefAfterFree2.c [2019-12-07 16:17:08,419 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-12-07 16:17:08,423 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 6 error locations. [2019-12-07 16:17:08,430 INFO L249 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2019-12-07 16:17:08,442 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-12-07 16:17:08,443 INFO L374 AbstractCegarLoop]: Hoare is false [2019-12-07 16:17:08,443 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-12-07 16:17:08,443 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-12-07 16:17:08,443 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-07 16:17:08,443 INFO L378 AbstractCegarLoop]: Difference is false [2019-12-07 16:17:08,443 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-07 16:17:08,443 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-12-07 16:17:08,453 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2019-12-07 16:17:08,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-12-07 16:17:08,458 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 16:17:08,459 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 16:17:08,459 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr3ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr5ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION]=== [2019-12-07 16:17:08,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 16:17:08,462 INFO L82 PathProgramCache]: Analyzing trace with hash 868112163, now seen corresponding path program 1 times [2019-12-07 16:17:08,468 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 16:17:08,468 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003910535] [2019-12-07 16:17:08,468 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 16:17:08,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:17:08,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:17:08,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 16:17:08,601 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003910535] [2019-12-07 16:17:08,602 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 16:17:08,602 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-12-07 16:17:08,603 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523042674] [2019-12-07 16:17:08,606 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-07 16:17:08,606 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 16:17:08,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-07 16:17:08,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-12-07 16:17:08,617 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 4 states. [2019-12-07 16:17:08,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 16:17:08,691 INFO L93 Difference]: Finished difference Result 29 states and 30 transitions. [2019-12-07 16:17:08,691 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-07 16:17:08,692 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2019-12-07 16:17:08,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 16:17:08,699 INFO L225 Difference]: With dead ends: 29 [2019-12-07 16:17:08,699 INFO L226 Difference]: Without dead ends: 26 [2019-12-07 16:17:08,700 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-12-07 16:17:08,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-12-07 16:17:08,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2019-12-07 16:17:08,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-12-07 16:17:08,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2019-12-07 16:17:08,724 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 8 [2019-12-07 16:17:08,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 16:17:08,725 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2019-12-07 16:17:08,725 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-07 16:17:08,725 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2019-12-07 16:17:08,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-12-07 16:17:08,725 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 16:17:08,725 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 16:17:08,726 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr3ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr5ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION]=== [2019-12-07 16:17:08,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 16:17:08,726 INFO L82 PathProgramCache]: Analyzing trace with hash 868112162, now seen corresponding path program 1 times [2019-12-07 16:17:08,726 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 16:17:08,726 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731231971] [2019-12-07 16:17:08,727 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 16:17:08,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:17:08,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:17:08,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 16:17:08,768 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731231971] [2019-12-07 16:17:08,768 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 16:17:08,768 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-12-07 16:17:08,769 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44089977] [2019-12-07 16:17:08,770 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-07 16:17:08,770 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 16:17:08,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-07 16:17:08,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-12-07 16:17:08,771 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 4 states. [2019-12-07 16:17:08,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 16:17:08,808 INFO L93 Difference]: Finished difference Result 30 states and 31 transitions. [2019-12-07 16:17:08,808 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-07 16:17:08,808 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2019-12-07 16:17:08,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 16:17:08,809 INFO L225 Difference]: With dead ends: 30 [2019-12-07 16:17:08,809 INFO L226 Difference]: Without dead ends: 30 [2019-12-07 16:17:08,809 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-12-07 16:17:08,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-12-07 16:17:08,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 26. [2019-12-07 16:17:08,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-12-07 16:17:08,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2019-12-07 16:17:08,813 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 8 [2019-12-07 16:17:08,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 16:17:08,813 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2019-12-07 16:17:08,813 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-07 16:17:08,813 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2019-12-07 16:17:08,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-07 16:17:08,813 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 16:17:08,813 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 16:17:08,814 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr3ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr5ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION]=== [2019-12-07 16:17:08,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 16:17:08,814 INFO L82 PathProgramCache]: Analyzing trace with hash -258436314, now seen corresponding path program 1 times [2019-12-07 16:17:08,814 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 16:17:08,814 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533177803] [2019-12-07 16:17:08,814 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 16:17:08,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:17:08,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:17:08,883 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 16:17:08,883 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533177803] [2019-12-07 16:17:08,883 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 16:17:08,883 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-12-07 16:17:08,884 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433693305] [2019-12-07 16:17:08,884 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-07 16:17:08,884 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 16:17:08,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-07 16:17:08,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-12-07 16:17:08,885 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand 7 states. [2019-12-07 16:17:08,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 16:17:08,925 INFO L93 Difference]: Finished difference Result 25 states and 27 transitions. [2019-12-07 16:17:08,926 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-07 16:17:08,926 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2019-12-07 16:17:08,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 16:17:08,927 INFO L225 Difference]: With dead ends: 25 [2019-12-07 16:17:08,927 INFO L226 Difference]: Without dead ends: 25 [2019-12-07 16:17:08,927 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-12-07 16:17:08,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-12-07 16:17:08,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2019-12-07 16:17:08,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-12-07 16:17:08,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2019-12-07 16:17:08,931 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 12 [2019-12-07 16:17:08,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 16:17:08,931 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2019-12-07 16:17:08,931 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-07 16:17:08,931 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2019-12-07 16:17:08,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-07 16:17:08,932 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 16:17:08,932 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 16:17:08,932 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr3ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr5ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION]=== [2019-12-07 16:17:08,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 16:17:08,933 INFO L82 PathProgramCache]: Analyzing trace with hash 578407498, now seen corresponding path program 1 times [2019-12-07 16:17:08,933 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 16:17:08,933 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384207135] [2019-12-07 16:17:08,933 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 16:17:08,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:17:08,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:17:08,967 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 16:17:08,967 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384207135] [2019-12-07 16:17:08,968 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891194052] [2019-12-07 16:17:08,968 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_151f8883-69a3-4a11-9d8b-0293cbfcc8a8/bin/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 16:17:08,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:17:08,998 INFO L264 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 3 conjunts are in the unsatisfiable core [2019-12-07 16:17:09,001 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 16:17:09,022 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 16:17:09,022 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 16:17:09,022 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2019-12-07 16:17:09,023 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520605851] [2019-12-07 16:17:09,023 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-12-07 16:17:09,023 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 16:17:09,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-12-07 16:17:09,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-12-07 16:17:09,024 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 6 states. [2019-12-07 16:17:09,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 16:17:09,059 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2019-12-07 16:17:09,059 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-07 16:17:09,059 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2019-12-07 16:17:09,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 16:17:09,060 INFO L225 Difference]: With dead ends: 29 [2019-12-07 16:17:09,060 INFO L226 Difference]: Without dead ends: 29 [2019-12-07 16:17:09,061 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-12-07 16:17:09,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-12-07 16:17:09,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2019-12-07 16:17:09,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-12-07 16:17:09,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2019-12-07 16:17:09,064 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 13 [2019-12-07 16:17:09,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 16:17:09,065 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2019-12-07 16:17:09,065 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-12-07 16:17:09,065 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2019-12-07 16:17:09,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-12-07 16:17:09,066 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 16:17:09,066 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 16:17:09,266 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 16:17:09,267 INFO L410 AbstractCegarLoop]: === Iteration 5 === [mainErr3ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr5ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION]=== [2019-12-07 16:17:09,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 16:17:09,268 INFO L82 PathProgramCache]: Analyzing trace with hash -977036761, now seen corresponding path program 2 times [2019-12-07 16:17:09,268 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 16:17:09,269 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450799176] [2019-12-07 16:17:09,269 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 16:17:09,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:17:09,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:17:09,351 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 16:17:09,351 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450799176] [2019-12-07 16:17:09,351 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583115844] [2019-12-07 16:17:09,351 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_151f8883-69a3-4a11-9d8b-0293cbfcc8a8/bin/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 16:17:09,379 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-07 16:17:09,379 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 16:17:09,380 INFO L264 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-07 16:17:09,380 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 16:17:09,388 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 16:17:09,388 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 16:17:09,388 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2019-12-07 16:17:09,388 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649300600] [2019-12-07 16:17:09,389 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-07 16:17:09,389 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 16:17:09,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-07 16:17:09,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-12-07 16:17:09,389 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 7 states. [2019-12-07 16:17:09,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 16:17:09,420 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2019-12-07 16:17:09,420 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-07 16:17:09,420 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 17 [2019-12-07 16:17:09,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 16:17:09,421 INFO L225 Difference]: With dead ends: 33 [2019-12-07 16:17:09,421 INFO L226 Difference]: Without dead ends: 33 [2019-12-07 16:17:09,421 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-12-07 16:17:09,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-12-07 16:17:09,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2019-12-07 16:17:09,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-12-07 16:17:09,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2019-12-07 16:17:09,424 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 17 [2019-12-07 16:17:09,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 16:17:09,424 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2019-12-07 16:17:09,424 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-07 16:17:09,424 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2019-12-07 16:17:09,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-12-07 16:17:09,425 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 16:17:09,425 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 16:17:09,625 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 16:17:09,625 INFO L410 AbstractCegarLoop]: === Iteration 6 === [mainErr3ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr5ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION]=== [2019-12-07 16:17:09,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 16:17:09,626 INFO L82 PathProgramCache]: Analyzing trace with hash -242667132, now seen corresponding path program 3 times [2019-12-07 16:17:09,626 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 16:17:09,626 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308546520] [2019-12-07 16:17:09,626 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 16:17:09,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:17:09,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:17:09,684 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 16:17:09,685 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308546520] [2019-12-07 16:17:09,685 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177007887] [2019-12-07 16:17:09,685 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_151f8883-69a3-4a11-9d8b-0293cbfcc8a8/bin/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 16:17:09,710 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-07 16:17:09,710 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 16:17:09,711 INFO L264 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-07 16:17:09,712 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 16:17:09,720 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 16:17:09,721 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 16:17:09,721 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2019-12-07 16:17:09,721 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117686570] [2019-12-07 16:17:09,721 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-07 16:17:09,721 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 16:17:09,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-07 16:17:09,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-12-07 16:17:09,722 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 8 states. [2019-12-07 16:17:09,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 16:17:09,757 INFO L93 Difference]: Finished difference Result 37 states and 39 transitions. [2019-12-07 16:17:09,757 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-07 16:17:09,757 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 21 [2019-12-07 16:17:09,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 16:17:09,758 INFO L225 Difference]: With dead ends: 37 [2019-12-07 16:17:09,758 INFO L226 Difference]: Without dead ends: 37 [2019-12-07 16:17:09,758 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-12-07 16:17:09,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-12-07 16:17:09,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2019-12-07 16:17:09,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-12-07 16:17:09,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2019-12-07 16:17:09,762 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 21 [2019-12-07 16:17:09,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 16:17:09,762 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2019-12-07 16:17:09,763 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-07 16:17:09,763 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2019-12-07 16:17:09,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-12-07 16:17:09,763 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 16:17:09,764 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 16:17:09,964 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 16:17:09,965 INFO L410 AbstractCegarLoop]: === Iteration 7 === [mainErr3ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr5ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION]=== [2019-12-07 16:17:09,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 16:17:09,966 INFO L82 PathProgramCache]: Analyzing trace with hash 130667105, now seen corresponding path program 4 times [2019-12-07 16:17:09,966 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 16:17:09,967 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535880685] [2019-12-07 16:17:09,967 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 16:17:10,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:17:10,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:17:10,058 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 16:17:10,058 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535880685] [2019-12-07 16:17:10,059 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061857519] [2019-12-07 16:17:10,059 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_151f8883-69a3-4a11-9d8b-0293cbfcc8a8/bin/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 16:17:10,084 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-07 16:17:10,084 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 16:17:10,085 INFO L264 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-07 16:17:10,086 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 16:17:10,096 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 16:17:10,096 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 16:17:10,096 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2019-12-07 16:17:10,097 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033970615] [2019-12-07 16:17:10,097 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-07 16:17:10,097 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 16:17:10,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-07 16:17:10,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-12-07 16:17:10,098 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 9 states. [2019-12-07 16:17:10,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 16:17:10,150 INFO L93 Difference]: Finished difference Result 41 states and 43 transitions. [2019-12-07 16:17:10,150 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-07 16:17:10,150 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 25 [2019-12-07 16:17:10,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 16:17:10,151 INFO L225 Difference]: With dead ends: 41 [2019-12-07 16:17:10,151 INFO L226 Difference]: Without dead ends: 41 [2019-12-07 16:17:10,151 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-12-07 16:17:10,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-12-07 16:17:10,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2019-12-07 16:17:10,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-12-07 16:17:10,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2019-12-07 16:17:10,154 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 25 [2019-12-07 16:17:10,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 16:17:10,155 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2019-12-07 16:17:10,155 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-07 16:17:10,155 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2019-12-07 16:17:10,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-12-07 16:17:10,156 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 16:17:10,156 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 16:17:10,357 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 16:17:10,357 INFO L410 AbstractCegarLoop]: === Iteration 8 === [mainErr3ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr5ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION]=== [2019-12-07 16:17:10,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 16:17:10,358 INFO L82 PathProgramCache]: Analyzing trace with hash -656098114, now seen corresponding path program 5 times [2019-12-07 16:17:10,358 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 16:17:10,358 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875291513] [2019-12-07 16:17:10,358 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 16:17:10,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:17:10,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:17:10,455 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 13 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 16:17:10,455 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875291513] [2019-12-07 16:17:10,455 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791812615] [2019-12-07 16:17:10,455 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_151f8883-69a3-4a11-9d8b-0293cbfcc8a8/bin/uautomizer/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 16:17:10,485 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-12-07 16:17:10,485 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 16:17:10,485 INFO L264 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-07 16:17:10,487 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 16:17:10,547 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 16:17:10,547 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 16:17:10,547 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2019-12-07 16:17:10,548 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402782335] [2019-12-07 16:17:10,548 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-07 16:17:10,548 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 16:17:10,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-07 16:17:10,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2019-12-07 16:17:10,549 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand 16 states. [2019-12-07 16:17:10,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 16:17:10,778 INFO L93 Difference]: Finished difference Result 55 states and 60 transitions. [2019-12-07 16:17:10,778 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-07 16:17:10,778 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 29 [2019-12-07 16:17:10,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 16:17:10,780 INFO L225 Difference]: With dead ends: 55 [2019-12-07 16:17:10,780 INFO L226 Difference]: Without dead ends: 55 [2019-12-07 16:17:10,780 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=218, Invalid=432, Unknown=0, NotChecked=0, Total=650 [2019-12-07 16:17:10,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-12-07 16:17:10,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2019-12-07 16:17:10,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2019-12-07 16:17:10,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 60 transitions. [2019-12-07 16:17:10,786 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 60 transitions. Word has length 29 [2019-12-07 16:17:10,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 16:17:10,786 INFO L462 AbstractCegarLoop]: Abstraction has 55 states and 60 transitions. [2019-12-07 16:17:10,786 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-07 16:17:10,786 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 60 transitions. [2019-12-07 16:17:10,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-12-07 16:17:10,787 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 16:17:10,787 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 16:17:10,987 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 16:17:10,989 INFO L410 AbstractCegarLoop]: === Iteration 9 === [mainErr3ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr5ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION]=== [2019-12-07 16:17:10,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 16:17:10,990 INFO L82 PathProgramCache]: Analyzing trace with hash 851171268, now seen corresponding path program 1 times [2019-12-07 16:17:10,990 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 16:17:10,991 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34078006] [2019-12-07 16:17:10,991 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 16:17:11,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:17:11,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:17:11,068 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2019-12-07 16:17:11,068 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34078006] [2019-12-07 16:17:11,068 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 16:17:11,069 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-12-07 16:17:11,069 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438720726] [2019-12-07 16:17:11,069 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-07 16:17:11,069 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 16:17:11,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-07 16:17:11,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-12-07 16:17:11,070 INFO L87 Difference]: Start difference. First operand 55 states and 60 transitions. Second operand 4 states. [2019-12-07 16:17:11,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 16:17:11,089 INFO L93 Difference]: Finished difference Result 54 states and 59 transitions. [2019-12-07 16:17:11,089 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-07 16:17:11,089 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 31 [2019-12-07 16:17:11,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 16:17:11,089 INFO L225 Difference]: With dead ends: 54 [2019-12-07 16:17:11,090 INFO L226 Difference]: Without dead ends: 54 [2019-12-07 16:17:11,090 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-12-07 16:17:11,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-12-07 16:17:11,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2019-12-07 16:17:11,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-12-07 16:17:11,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 59 transitions. [2019-12-07 16:17:11,093 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 59 transitions. Word has length 31 [2019-12-07 16:17:11,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 16:17:11,093 INFO L462 AbstractCegarLoop]: Abstraction has 54 states and 59 transitions. [2019-12-07 16:17:11,093 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-07 16:17:11,093 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 59 transitions. [2019-12-07 16:17:11,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-12-07 16:17:11,094 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 16:17:11,094 INFO L410 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 16:17:11,094 INFO L410 AbstractCegarLoop]: === Iteration 10 === [mainErr3ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr5ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION]=== [2019-12-07 16:17:11,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 16:17:11,094 INFO L82 PathProgramCache]: Analyzing trace with hash 1037842699, now seen corresponding path program 1 times [2019-12-07 16:17:11,094 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 16:17:11,095 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162515382] [2019-12-07 16:17:11,095 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 16:17:11,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 16:17:11,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 16:17:11,130 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-12-07 16:17:11,130 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-12-07 16:17:11,150 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.12 04:17:11 BoogieIcfgContainer [2019-12-07 16:17:11,151 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-12-07 16:17:11,151 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-12-07 16:17:11,151 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-12-07 16:17:11,151 INFO L275 PluginConnector]: Witness Printer initialized [2019-12-07 16:17:11,151 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 04:17:08" (3/4) ... [2019-12-07 16:17:11,153 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-12-07 16:17:11,187 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_151f8883-69a3-4a11-9d8b-0293cbfcc8a8/bin/uautomizer/witness.graphml [2019-12-07 16:17:11,188 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-12-07 16:17:11,189 INFO L168 Benchmark]: Toolchain (without parser) took 3143.25 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 81.3 MB). Free memory was 939.4 MB in the beginning and 1.0 GB in the end (delta: -74.9 MB). Peak memory consumption was 6.4 MB. Max. memory is 11.5 GB. [2019-12-07 16:17:11,189 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 1.0 GB. Free memory is still 955.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 16:17:11,190 INFO L168 Benchmark]: CACSL2BoogieTranslator took 178.12 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 81.3 MB). Free memory was 939.4 MB in the beginning and 1.1 GB in the end (delta: -135.4 MB). Peak memory consumption was 23.2 MB. Max. memory is 11.5 GB. [2019-12-07 16:17:11,190 INFO L168 Benchmark]: Boogie Preprocessor took 25.94 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 16:17:11,190 INFO L168 Benchmark]: RCFGBuilder took 157.39 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 16.5 MB). Peak memory consumption was 16.5 MB. Max. memory is 11.5 GB. [2019-12-07 16:17:11,190 INFO L168 Benchmark]: TraceAbstraction took 2742.14 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 37.3 MB). Peak memory consumption was 37.3 MB. Max. memory is 11.5 GB. [2019-12-07 16:17:11,191 INFO L168 Benchmark]: Witness Printer took 36.75 ms. Allocated memory is still 1.1 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 6.7 MB). Peak memory consumption was 6.7 MB. Max. memory is 11.5 GB. [2019-12-07 16:17:11,192 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 ms. Allocated memory is still 1.0 GB. Free memory is still 955.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 178.12 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 81.3 MB). Free memory was 939.4 MB in the beginning and 1.1 GB in the end (delta: -135.4 MB). Peak memory consumption was 23.2 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 25.94 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 157.39 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 16.5 MB). Peak memory consumption was 16.5 MB. Max. memory is 11.5 GB. * TraceAbstraction took 2742.14 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 37.3 MB). Peak memory consumption was 37.3 MB. Max. memory is 11.5 GB. * Witness Printer took 36.75 ms. Allocated memory is still 1.1 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 6.7 MB). Peak memory consumption was 6.7 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: 2.6s, OverallIterations: 10, TraceHistogramMax: 7, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 112 SDtfs, 176 SDslu, 252 SDs, 0 SdLazy, 421 SolverSat, 47 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 175 GetRequests, 117 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=55occurred in iteration=8, 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, 9 MinimizatonAttempts, 11 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 304 NumberOfCodeBlocks, 304 NumberOfCodeBlocksAsserted, 25 NumberOfCheckSat, 255 ConstructedInterpolants, 0 QuantifiedInterpolants, 18153 SizeOfPredicates, 5 NumberOfNonLiveVariables, 365 ConjunctsInSsa, 25 ConjunctsInUnsatCore, 14 InterpolantComputations, 4 PerfectInterpolantSequences, 70/247 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...