./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/termination-crafted/LexIndexValue-Array-1.c --full-output --architecture 64bit -------------------------------------------------------------------------------- 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_bf880bb2-0b16-4810-a187-1b93f469ecfd/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_bf880bb2-0b16-4810-a187-1b93f469ecfd/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_bf880bb2-0b16-4810-a187-1b93f469ecfd/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_bf880bb2-0b16-4810-a187-1b93f469ecfd/bin/uautomizer/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/termination-crafted/LexIndexValue-Array-1.c -s /tmp/vcloud-vcloud-master/worker/run_dir_bf880bb2-0b16-4810-a187-1b93f469ecfd/bin/uautomizer/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_bf880bb2-0b16-4810-a187-1b93f469ecfd/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 64bit --witnessprinter.graph.data.programhash b9dfe2826dbd43b76a93fbf593c8a07947a4c894 ....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.25-f470102 [2019-12-07 13:50:55,563 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-07 13:50:55,565 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-07 13:50:55,572 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-07 13:50:55,572 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-07 13:50:55,573 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-07 13:50:55,574 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-07 13:50:55,575 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-07 13:50:55,577 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-07 13:50:55,577 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-07 13:50:55,578 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-07 13:50:55,579 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-07 13:50:55,579 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-07 13:50:55,580 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-07 13:50:55,580 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-07 13:50:55,581 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-07 13:50:55,582 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-07 13:50:55,582 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-07 13:50:55,584 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-07 13:50:55,586 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-07 13:50:55,587 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-07 13:50:55,588 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-07 13:50:55,588 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-07 13:50:55,589 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-07 13:50:55,590 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-12-07 13:50:55,591 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-12-07 13:50:55,591 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-12-07 13:50:55,591 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-12-07 13:50:55,592 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-12-07 13:50:55,592 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-12-07 13:50:55,592 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-07 13:50:55,593 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-07 13:50:55,593 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-07 13:50:55,594 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-07 13:50:55,594 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-07 13:50:55,594 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-07 13:50:55,595 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-07 13:50:55,595 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-07 13:50:55,595 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-07 13:50:55,595 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-07 13:50:55,596 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-07 13:50:55,596 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_bf880bb2-0b16-4810-a187-1b93f469ecfd/bin/uautomizer/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf [2019-12-07 13:50:55,605 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-07 13:50:55,605 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-07 13:50:55,606 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-12-07 13:50:55,606 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-12-07 13:50:55,606 INFO L138 SettingsManager]: * Use SBE=true [2019-12-07 13:50:55,606 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-07 13:50:55,607 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-12-07 13:50:55,607 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-12-07 13:50:55,607 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-07 13:50:55,607 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2019-12-07 13:50:55,607 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2019-12-07 13:50:55,607 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2019-12-07 13:50:55,607 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-12-07 13:50:55,607 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-12-07 13:50:55,607 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-07 13:50:55,608 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-07 13:50:55,608 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-12-07 13:50:55,608 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-12-07 13:50:55,608 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-12-07 13:50:55,608 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-07 13:50:55,608 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-07 13:50:55,608 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-12-07 13:50:55,608 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-12-07 13:50:55,608 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-12-07 13:50:55,608 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-12-07 13:50:55,609 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_bf880bb2-0b16-4810-a187-1b93f469ecfd/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 -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b9dfe2826dbd43b76a93fbf593c8a07947a4c894 [2019-12-07 13:50:55,711 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-07 13:50:55,718 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-07 13:50:55,721 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-07 13:50:55,722 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-07 13:50:55,722 INFO L275 PluginConnector]: CDTParser initialized [2019-12-07 13:50:55,722 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_bf880bb2-0b16-4810-a187-1b93f469ecfd/bin/uautomizer/../../sv-benchmarks/c/termination-crafted/LexIndexValue-Array-1.c [2019-12-07 13:50:55,759 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_bf880bb2-0b16-4810-a187-1b93f469ecfd/bin/uautomizer/data/22bebb99e/f3ac74662c9242e1bb8369bdc2bd2c20/FLAG23780fd33 [2019-12-07 13:50:56,190 INFO L306 CDTParser]: Found 1 translation units. [2019-12-07 13:50:56,190 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_bf880bb2-0b16-4810-a187-1b93f469ecfd/sv-benchmarks/c/termination-crafted/LexIndexValue-Array-1.c [2019-12-07 13:50:56,194 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_bf880bb2-0b16-4810-a187-1b93f469ecfd/bin/uautomizer/data/22bebb99e/f3ac74662c9242e1bb8369bdc2bd2c20/FLAG23780fd33 [2019-12-07 13:50:56,202 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_bf880bb2-0b16-4810-a187-1b93f469ecfd/bin/uautomizer/data/22bebb99e/f3ac74662c9242e1bb8369bdc2bd2c20 [2019-12-07 13:50:56,204 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-07 13:50:56,205 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-12-07 13:50:56,205 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-07 13:50:56,206 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-07 13:50:56,208 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-07 13:50:56,208 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 01:50:56" (1/1) ... [2019-12-07 13:50:56,210 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ffc5a17 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:50:56, skipping insertion in model container [2019-12-07 13:50:56,210 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 01:50:56" (1/1) ... [2019-12-07 13:50:56,215 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-07 13:50:56,224 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-07 13:50:56,322 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 13:50:56,324 INFO L203 MainTranslator]: Completed pre-run [2019-12-07 13:50:56,368 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 13:50:56,380 INFO L208 MainTranslator]: Completed translation [2019-12-07 13:50:56,380 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:50:56 WrapperNode [2019-12-07 13:50:56,381 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-07 13:50:56,381 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-07 13:50:56,381 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-07 13:50:56,381 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-07 13:50:56,389 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:50:56" (1/1) ... [2019-12-07 13:50:56,389 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:50:56" (1/1) ... [2019-12-07 13:50:56,394 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:50:56" (1/1) ... [2019-12-07 13:50:56,394 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:50:56" (1/1) ... [2019-12-07 13:50:56,398 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:50:56" (1/1) ... [2019-12-07 13:50:56,401 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:50:56" (1/1) ... [2019-12-07 13:50:56,402 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:50:56" (1/1) ... [2019-12-07 13:50:56,403 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-07 13:50:56,403 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-07 13:50:56,403 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-07 13:50:56,403 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-07 13:50:56,404 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:50:56" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bf880bb2-0b16-4810-a187-1b93f469ecfd/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 13:50:56,443 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-12-07 13:50:56,443 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-07 13:50:56,443 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-12-07 13:50:56,444 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-12-07 13:50:56,444 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-12-07 13:50:56,444 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-12-07 13:50:56,444 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-12-07 13:50:56,444 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-12-07 13:50:56,444 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-12-07 13:50:56,444 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-12-07 13:50:56,444 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-07 13:50:56,585 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-07 13:50:56,585 INFO L287 CfgBuilder]: Removed 2 assume(true) statements. [2019-12-07 13:50:56,586 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 01:50:56 BoogieIcfgContainer [2019-12-07 13:50:56,586 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-07 13:50:56,587 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-12-07 13:50:56,587 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-12-07 13:50:56,589 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-12-07 13:50:56,589 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 01:50:56" (1/3) ... [2019-12-07 13:50:56,589 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18b4820 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 01:50:56, skipping insertion in model container [2019-12-07 13:50:56,590 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:50:56" (2/3) ... [2019-12-07 13:50:56,590 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18b4820 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 01:50:56, skipping insertion in model container [2019-12-07 13:50:56,590 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 01:50:56" (3/3) ... [2019-12-07 13:50:56,591 INFO L109 eAbstractionObserver]: Analyzing ICFG LexIndexValue-Array-1.c [2019-12-07 13:50:56,597 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-12-07 13:50:56,601 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 9 error locations. [2019-12-07 13:50:56,609 INFO L249 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2019-12-07 13:50:56,620 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-12-07 13:50:56,620 INFO L374 AbstractCegarLoop]: Hoare is false [2019-12-07 13:50:56,621 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-12-07 13:50:56,621 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-12-07 13:50:56,621 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-07 13:50:56,621 INFO L378 AbstractCegarLoop]: Difference is false [2019-12-07 13:50:56,621 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-07 13:50:56,621 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-12-07 13:50:56,631 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states. [2019-12-07 13:50:56,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-12-07 13:50:56,637 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:50:56,637 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:50:56,638 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK]=== [2019-12-07 13:50:56,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:50:56,641 INFO L82 PathProgramCache]: Analyzing trace with hash -1038673271, now seen corresponding path program 1 times [2019-12-07 13:50:56,647 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:50:56,647 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874103498] [2019-12-07 13:50:56,647 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:50:56,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:50:56,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:50:56,776 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 13:50:56,777 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874103498] [2019-12-07 13:50:56,777 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 13:50:56,778 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-12-07 13:50:56,778 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304055934] [2019-12-07 13:50:56,781 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-07 13:50:56,781 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:50:56,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-07 13:50:56,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-12-07 13:50:56,792 INFO L87 Difference]: Start difference. First operand 34 states. Second operand 4 states. [2019-12-07 13:50:56,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:50:56,869 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2019-12-07 13:50:56,869 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-07 13:50:56,870 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2019-12-07 13:50:56,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:50:56,876 INFO L225 Difference]: With dead ends: 39 [2019-12-07 13:50:56,876 INFO L226 Difference]: Without dead ends: 36 [2019-12-07 13:50:56,877 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 13:50:56,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-12-07 13:50:56,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2019-12-07 13:50:56,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-12-07 13:50:56,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2019-12-07 13:50:56,901 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 8 [2019-12-07 13:50:56,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:50:56,901 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2019-12-07 13:50:56,901 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-07 13:50:56,901 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2019-12-07 13:50:56,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-12-07 13:50:56,901 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:50:56,901 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:50:56,902 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK]=== [2019-12-07 13:50:56,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:50:56,902 INFO L82 PathProgramCache]: Analyzing trace with hash -1038673272, now seen corresponding path program 1 times [2019-12-07 13:50:56,902 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:50:56,902 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022010711] [2019-12-07 13:50:56,902 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:50:56,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:50:56,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:50:56,933 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 13:50:56,933 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022010711] [2019-12-07 13:50:56,933 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 13:50:56,933 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-12-07 13:50:56,933 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706866610] [2019-12-07 13:50:56,935 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-07 13:50:56,935 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:50:56,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-07 13:50:56,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-12-07 13:50:56,936 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 4 states. [2019-12-07 13:50:56,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:50:56,976 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2019-12-07 13:50:56,976 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-07 13:50:56,976 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2019-12-07 13:50:56,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:50:56,977 INFO L225 Difference]: With dead ends: 29 [2019-12-07 13:50:56,977 INFO L226 Difference]: Without dead ends: 29 [2019-12-07 13:50:56,977 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 13:50:56,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-12-07 13:50:56,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2019-12-07 13:50:56,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-12-07 13:50:56,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2019-12-07 13:50:56,980 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 8 [2019-12-07 13:50:56,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:50:56,981 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2019-12-07 13:50:56,981 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-07 13:50:56,981 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2019-12-07 13:50:56,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-07 13:50:56,981 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:50:56,981 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:50:56,981 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK]=== [2019-12-07 13:50:56,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:50:56,982 INFO L82 PathProgramCache]: Analyzing trace with hash 1416659532, now seen corresponding path program 1 times [2019-12-07 13:50:56,982 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:50:56,982 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205665862] [2019-12-07 13:50:56,982 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:50:56,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:50:57,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:50:57,041 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:50:57,042 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205665862] [2019-12-07 13:50:57,042 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066475666] [2019-12-07 13:50:57,042 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bf880bb2-0b16-4810-a187-1b93f469ecfd/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 13:50:57,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:50:57,069 INFO L264 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-07 13:50:57,072 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:50:57,108 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 [2019-12-07 13:50:57,108 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 13:50:57,114 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:50:57,114 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-12-07 13:50:57,114 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2019-12-07 13:50:57,122 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:50:57,122 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 13:50:57,122 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 4 [2019-12-07 13:50:57,122 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382723726] [2019-12-07 13:50:57,123 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-07 13:50:57,123 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:50:57,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-07 13:50:57,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-12-07 13:50:57,123 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand 5 states. [2019-12-07 13:50:57,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:50:57,179 INFO L93 Difference]: Finished difference Result 35 states and 38 transitions. [2019-12-07 13:50:57,179 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-07 13:50:57,179 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2019-12-07 13:50:57,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:50:57,180 INFO L225 Difference]: With dead ends: 35 [2019-12-07 13:50:57,180 INFO L226 Difference]: Without dead ends: 35 [2019-12-07 13:50:57,180 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-12-07 13:50:57,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-12-07 13:50:57,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2019-12-07 13:50:57,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-12-07 13:50:57,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2019-12-07 13:50:57,184 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 12 [2019-12-07 13:50:57,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:50:57,185 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2019-12-07 13:50:57,185 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-07 13:50:57,185 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2019-12-07 13:50:57,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-12-07 13:50:57,185 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:50:57,185 INFO L410 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:50:57,386 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:50:57,386 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK]=== [2019-12-07 13:50:57,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:50:57,387 INFO L82 PathProgramCache]: Analyzing trace with hash -931508081, now seen corresponding path program 2 times [2019-12-07 13:50:57,387 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:50:57,388 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497888662] [2019-12-07 13:50:57,388 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:50:57,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:50:57,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:50:57,537 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:50:57,537 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497888662] [2019-12-07 13:50:57,538 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527961161] [2019-12-07 13:50:57,538 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bf880bb2-0b16-4810-a187-1b93f469ecfd/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 13:50:57,586 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-07 13:50:57,586 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 13:50:57,587 INFO L264 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-07 13:50:57,588 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:50:57,594 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 [2019-12-07 13:50:57,594 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 13:50:57,598 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:50:57,599 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-12-07 13:50:57,599 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2019-12-07 13:50:57,642 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:50:57,642 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-12-07 13:50:57,643 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 9 [2019-12-07 13:50:57,643 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769743137] [2019-12-07 13:50:57,643 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-12-07 13:50:57,643 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:50:57,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-12-07 13:50:57,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-12-07 13:50:57,644 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand 6 states. [2019-12-07 13:50:57,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:50:57,671 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2019-12-07 13:50:57,672 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-07 13:50:57,672 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2019-12-07 13:50:57,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:50:57,673 INFO L225 Difference]: With dead ends: 34 [2019-12-07 13:50:57,673 INFO L226 Difference]: Without dead ends: 34 [2019-12-07 13:50:57,673 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-12-07 13:50:57,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-12-07 13:50:57,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 31. [2019-12-07 13:50:57,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-12-07 13:50:57,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2019-12-07 13:50:57,676 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 16 [2019-12-07 13:50:57,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:50:57,676 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2019-12-07 13:50:57,676 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-12-07 13:50:57,677 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2019-12-07 13:50:57,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-07 13:50:57,677 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:50:57,677 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:50:57,877 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:50:57,878 INFO L410 AbstractCegarLoop]: === Iteration 5 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK]=== [2019-12-07 13:50:57,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:50:57,879 INFO L82 PathProgramCache]: Analyzing trace with hash -1826117314, now seen corresponding path program 1 times [2019-12-07 13:50:57,879 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:50:57,879 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746091865] [2019-12-07 13:50:57,879 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:50:57,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:50:57,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:50:57,937 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 13:50:57,938 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746091865] [2019-12-07 13:50:57,938 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122762433] [2019-12-07 13:50:57,938 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bf880bb2-0b16-4810-a187-1b93f469ecfd/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 13:50:57,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:50:57,960 INFO L264 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-07 13:50:57,961 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:50:57,970 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 13:50:57,971 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 13:50:57,971 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2019-12-07 13:50:57,971 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128738579] [2019-12-07 13:50:57,972 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-07 13:50:57,972 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:50:57,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-07 13:50:57,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-12-07 13:50:57,972 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand 7 states. [2019-12-07 13:50:58,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:50:58,011 INFO L93 Difference]: Finished difference Result 38 states and 41 transitions. [2019-12-07 13:50:58,012 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-07 13:50:58,012 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 18 [2019-12-07 13:50:58,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:50:58,012 INFO L225 Difference]: With dead ends: 38 [2019-12-07 13:50:58,012 INFO L226 Difference]: Without dead ends: 38 [2019-12-07 13:50:58,013 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 19 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 13:50:58,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-12-07 13:50:58,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 35. [2019-12-07 13:50:58,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-12-07 13:50:58,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2019-12-07 13:50:58,016 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 18 [2019-12-07 13:50:58,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:50:58,016 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2019-12-07 13:50:58,016 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-07 13:50:58,016 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2019-12-07 13:50:58,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-12-07 13:50:58,017 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:50:58,017 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:50:58,217 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:50:58,218 INFO L410 AbstractCegarLoop]: === Iteration 6 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK]=== [2019-12-07 13:50:58,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:50:58,219 INFO L82 PathProgramCache]: Analyzing trace with hash 945846593, now seen corresponding path program 2 times [2019-12-07 13:50:58,219 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:50:58,219 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312491641] [2019-12-07 13:50:58,220 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:50:58,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:50:58,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:50:58,289 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 13:50:58,289 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312491641] [2019-12-07 13:50:58,290 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264371349] [2019-12-07 13:50:58,290 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bf880bb2-0b16-4810-a187-1b93f469ecfd/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 13:50:58,312 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2019-12-07 13:50:58,312 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 13:50:58,313 INFO L264 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-07 13:50:58,314 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:50:58,320 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 [2019-12-07 13:50:58,320 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 13:50:58,324 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:50:58,324 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-12-07 13:50:58,324 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2019-12-07 13:50:58,336 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-12-07 13:50:58,337 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-12-07 13:50:58,337 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2019-12-07 13:50:58,337 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200669331] [2019-12-07 13:50:58,337 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-12-07 13:50:58,337 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:50:58,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-12-07 13:50:58,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-12-07 13:50:58,338 INFO L87 Difference]: Start difference. First operand 35 states and 38 transitions. Second operand 3 states. [2019-12-07 13:50:58,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:50:58,358 INFO L93 Difference]: Finished difference Result 46 states and 52 transitions. [2019-12-07 13:50:58,358 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-12-07 13:50:58,358 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2019-12-07 13:50:58,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:50:58,359 INFO L225 Difference]: With dead ends: 46 [2019-12-07 13:50:58,359 INFO L226 Difference]: Without dead ends: 46 [2019-12-07 13:50:58,359 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-12-07 13:50:58,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-12-07 13:50:58,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2019-12-07 13:50:58,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2019-12-07 13:50:58,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 51 transitions. [2019-12-07 13:50:58,363 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 51 transitions. Word has length 22 [2019-12-07 13:50:58,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:50:58,363 INFO L462 AbstractCegarLoop]: Abstraction has 45 states and 51 transitions. [2019-12-07 13:50:58,363 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-12-07 13:50:58,363 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 51 transitions. [2019-12-07 13:50:58,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-12-07 13:50:58,364 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:50:58,364 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:50:58,564 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:50:58,565 INFO L410 AbstractCegarLoop]: === Iteration 7 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK]=== [2019-12-07 13:50:58,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:50:58,566 INFO L82 PathProgramCache]: Analyzing trace with hash -1574303516, now seen corresponding path program 1 times [2019-12-07 13:50:58,566 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:50:58,566 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97196722] [2019-12-07 13:50:58,567 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:50:58,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:50:58,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:50:58,622 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-12-07 13:50:58,622 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97196722] [2019-12-07 13:50:58,622 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 13:50:58,622 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-12-07 13:50:58,623 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459708101] [2019-12-07 13:50:58,623 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-07 13:50:58,623 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:50:58,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-07 13:50:58,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-12-07 13:50:58,624 INFO L87 Difference]: Start difference. First operand 45 states and 51 transitions. Second operand 5 states. [2019-12-07 13:50:58,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:50:58,677 INFO L93 Difference]: Finished difference Result 48 states and 52 transitions. [2019-12-07 13:50:58,678 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-07 13:50:58,678 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2019-12-07 13:50:58,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:50:58,678 INFO L225 Difference]: With dead ends: 48 [2019-12-07 13:50:58,679 INFO L226 Difference]: Without dead ends: 48 [2019-12-07 13:50:58,679 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-12-07 13:50:58,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2019-12-07 13:50:58,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 45. [2019-12-07 13:50:58,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2019-12-07 13:50:58,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 50 transitions. [2019-12-07 13:50:58,682 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 50 transitions. Word has length 24 [2019-12-07 13:50:58,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:50:58,682 INFO L462 AbstractCegarLoop]: Abstraction has 45 states and 50 transitions. [2019-12-07 13:50:58,682 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-07 13:50:58,683 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 50 transitions. [2019-12-07 13:50:58,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-12-07 13:50:58,683 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:50:58,683 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:50:58,683 INFO L410 AbstractCegarLoop]: === Iteration 8 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK]=== [2019-12-07 13:50:58,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:50:58,684 INFO L82 PathProgramCache]: Analyzing trace with hash -1258071097, now seen corresponding path program 1 times [2019-12-07 13:50:58,684 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:50:58,684 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474764627] [2019-12-07 13:50:58,684 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:50:58,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:50:58,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:50:58,729 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 13:50:58,730 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474764627] [2019-12-07 13:50:58,730 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998301222] [2019-12-07 13:50:58,730 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bf880bb2-0b16-4810-a187-1b93f469ecfd/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 13:50:58,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:50:58,757 INFO L264 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-07 13:50:58,758 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:50:58,767 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 13:50:58,768 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 13:50:58,768 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2019-12-07 13:50:58,768 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987871058] [2019-12-07 13:50:58,768 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-07 13:50:58,768 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:50:58,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-07 13:50:58,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-12-07 13:50:58,769 INFO L87 Difference]: Start difference. First operand 45 states and 50 transitions. Second operand 8 states. [2019-12-07 13:50:58,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:50:58,822 INFO L93 Difference]: Finished difference Result 52 states and 57 transitions. [2019-12-07 13:50:58,823 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-07 13:50:58,823 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 26 [2019-12-07 13:50:58,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:50:58,824 INFO L225 Difference]: With dead ends: 52 [2019-12-07 13:50:58,824 INFO L226 Difference]: Without dead ends: 52 [2019-12-07 13:50:58,824 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 27 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 13:50:58,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-12-07 13:50:58,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 49. [2019-12-07 13:50:58,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2019-12-07 13:50:58,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 54 transitions. [2019-12-07 13:50:58,829 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 54 transitions. Word has length 26 [2019-12-07 13:50:58,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:50:58,829 INFO L462 AbstractCegarLoop]: Abstraction has 49 states and 54 transitions. [2019-12-07 13:50:58,829 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-07 13:50:58,829 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 54 transitions. [2019-12-07 13:50:58,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-12-07 13:50:58,830 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:50:58,830 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:50:59,031 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:50:59,032 INFO L410 AbstractCegarLoop]: === Iteration 9 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK]=== [2019-12-07 13:50:59,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:50:59,032 INFO L82 PathProgramCache]: Analyzing trace with hash -113674038, now seen corresponding path program 2 times [2019-12-07 13:50:59,033 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:50:59,033 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997078790] [2019-12-07 13:50:59,033 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:50:59,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:50:59,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:50:59,116 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 13:50:59,116 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997078790] [2019-12-07 13:50:59,116 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96366610] [2019-12-07 13:50:59,117 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bf880bb2-0b16-4810-a187-1b93f469ecfd/bin/uautomizer/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:50:59,146 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2019-12-07 13:50:59,146 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 13:50:59,147 INFO L264 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-07 13:50:59,148 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:50:59,190 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-12-07 13:50:59,190 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-12-07 13:50:59,190 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 11 [2019-12-07 13:50:59,190 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327113789] [2019-12-07 13:50:59,191 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-07 13:50:59,191 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:50:59,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-07 13:50:59,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2019-12-07 13:50:59,191 INFO L87 Difference]: Start difference. First operand 49 states and 54 transitions. Second operand 5 states. [2019-12-07 13:50:59,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:50:59,214 INFO L93 Difference]: Finished difference Result 48 states and 53 transitions. [2019-12-07 13:50:59,214 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-07 13:50:59,215 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 30 [2019-12-07 13:50:59,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:50:59,215 INFO L225 Difference]: With dead ends: 48 [2019-12-07 13:50:59,215 INFO L226 Difference]: Without dead ends: 46 [2019-12-07 13:50:59,216 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2019-12-07 13:50:59,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-12-07 13:50:59,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2019-12-07 13:50:59,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-12-07 13:50:59,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2019-12-07 13:50:59,218 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 30 [2019-12-07 13:50:59,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:50:59,218 INFO L462 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2019-12-07 13:50:59,219 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-07 13:50:59,219 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2019-12-07 13:50:59,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-12-07 13:50:59,219 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:50:59,219 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:50:59,420 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:50:59,420 INFO L410 AbstractCegarLoop]: === Iteration 10 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK]=== [2019-12-07 13:50:59,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:50:59,421 INFO L82 PathProgramCache]: Analyzing trace with hash -1865200645, now seen corresponding path program 1 times [2019-12-07 13:50:59,421 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:50:59,421 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152124440] [2019-12-07 13:50:59,421 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:50:59,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:50:59,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:50:59,506 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-07 13:50:59,506 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152124440] [2019-12-07 13:50:59,507 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352008435] [2019-12-07 13:50:59,507 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bf880bb2-0b16-4810-a187-1b93f469ecfd/bin/uautomizer/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:50:59,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:50:59,556 INFO L264 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-07 13:50:59,558 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:50:59,567 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-07 13:50:59,568 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 13:50:59,568 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2019-12-07 13:50:59,568 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048140008] [2019-12-07 13:50:59,568 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-07 13:50:59,568 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:50:59,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-07 13:50:59,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-12-07 13:50:59,569 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand 9 states. [2019-12-07 13:50:59,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:50:59,610 INFO L93 Difference]: Finished difference Result 53 states and 57 transitions. [2019-12-07 13:50:59,610 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-07 13:50:59,611 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 32 [2019-12-07 13:50:59,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:50:59,611 INFO L225 Difference]: With dead ends: 53 [2019-12-07 13:50:59,611 INFO L226 Difference]: Without dead ends: 53 [2019-12-07 13:50:59,612 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 33 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 13:50:59,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-12-07 13:50:59,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 50. [2019-12-07 13:50:59,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-12-07 13:50:59,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2019-12-07 13:50:59,614 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 32 [2019-12-07 13:50:59,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:50:59,615 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2019-12-07 13:50:59,615 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-07 13:50:59,615 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2019-12-07 13:50:59,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-12-07 13:50:59,616 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:50:59,616 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:50:59,816 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:50:59,817 INFO L410 AbstractCegarLoop]: === Iteration 11 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK]=== [2019-12-07 13:50:59,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:50:59,817 INFO L82 PathProgramCache]: Analyzing trace with hash 133323454, now seen corresponding path program 2 times [2019-12-07 13:50:59,818 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:50:59,818 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159837891] [2019-12-07 13:50:59,818 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:50:59,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:50:59,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:50:59,877 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-07 13:50:59,878 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159837891] [2019-12-07 13:50:59,878 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984505625] [2019-12-07 13:50:59,878 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bf880bb2-0b16-4810-a187-1b93f469ecfd/bin/uautomizer/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:50:59,902 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-07 13:50:59,902 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 13:50:59,903 INFO L264 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-07 13:50:59,904 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:50:59,917 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-07 13:50:59,917 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 13:50:59,917 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2019-12-07 13:50:59,917 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173097446] [2019-12-07 13:50:59,918 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-07 13:50:59,918 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:50:59,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-07 13:50:59,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2019-12-07 13:50:59,918 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand 10 states. [2019-12-07 13:50:59,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:50:59,960 INFO L93 Difference]: Finished difference Result 57 states and 61 transitions. [2019-12-07 13:50:59,960 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-07 13:50:59,960 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 36 [2019-12-07 13:50:59,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:50:59,961 INFO L225 Difference]: With dead ends: 57 [2019-12-07 13:50:59,961 INFO L226 Difference]: Without dead ends: 57 [2019-12-07 13:50:59,961 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2019-12-07 13:50:59,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2019-12-07 13:50:59,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 54. [2019-12-07 13:50:59,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-12-07 13:50:59,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 58 transitions. [2019-12-07 13:50:59,964 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 58 transitions. Word has length 36 [2019-12-07 13:50:59,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:50:59,964 INFO L462 AbstractCegarLoop]: Abstraction has 54 states and 58 transitions. [2019-12-07 13:50:59,964 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-07 13:50:59,964 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 58 transitions. [2019-12-07 13:50:59,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-12-07 13:50:59,965 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:50:59,965 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:51:00,166 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:51:00,166 INFO L410 AbstractCegarLoop]: === Iteration 12 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK]=== [2019-12-07 13:51:00,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:51:00,167 INFO L82 PathProgramCache]: Analyzing trace with hash -1483321343, now seen corresponding path program 3 times [2019-12-07 13:51:00,167 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:51:00,167 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355963040] [2019-12-07 13:51:00,168 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:51:00,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:51:00,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:51:00,280 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-07 13:51:00,281 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355963040] [2019-12-07 13:51:00,281 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832365353] [2019-12-07 13:51:00,281 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bf880bb2-0b16-4810-a187-1b93f469ecfd/bin/uautomizer/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:51:00,310 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-07 13:51:00,310 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 13:51:00,311 INFO L264 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-07 13:51:00,313 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:51:00,317 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 [2019-12-07 13:51:00,318 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 13:51:00,322 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:51:00,322 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-12-07 13:51:00,323 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2019-12-07 13:51:00,385 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2019-12-07 13:51:00,386 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-12-07 13:51:00,386 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 14 [2019-12-07 13:51:00,386 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731431444] [2019-12-07 13:51:00,386 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-12-07 13:51:00,386 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:51:00,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-12-07 13:51:00,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2019-12-07 13:51:00,387 INFO L87 Difference]: Start difference. First operand 54 states and 58 transitions. Second operand 6 states. [2019-12-07 13:51:00,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:51:00,449 INFO L93 Difference]: Finished difference Result 54 states and 58 transitions. [2019-12-07 13:51:00,449 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-07 13:51:00,449 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 40 [2019-12-07 13:51:00,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:51:00,450 INFO L225 Difference]: With dead ends: 54 [2019-12-07 13:51:00,450 INFO L226 Difference]: Without dead ends: 0 [2019-12-07 13:51:00,450 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2019-12-07 13:51:00,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-12-07 13:51:00,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-12-07 13:51:00,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-12-07 13:51:00,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-12-07 13:51:00,451 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 40 [2019-12-07 13:51:00,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:51:00,451 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-12-07 13:51:00,451 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-12-07 13:51:00,451 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-12-07 13:51:00,451 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-12-07 13:51:00,651 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:51:00,655 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.12 01:51:00 BoogieIcfgContainer [2019-12-07 13:51:00,655 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-12-07 13:51:00,655 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-12-07 13:51:00,655 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-12-07 13:51:00,656 INFO L275 PluginConnector]: Witness Printer initialized [2019-12-07 13:51:00,656 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 01:50:56" (3/4) ... [2019-12-07 13:51:00,658 INFO L137 WitnessPrinter]: Generating witness for correct program [2019-12-07 13:51:00,663 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2019-12-07 13:51:00,663 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2019-12-07 13:51:00,666 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 10 nodes and edges [2019-12-07 13:51:00,666 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2019-12-07 13:51:00,666 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2019-12-07 13:51:00,667 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2019-12-07 13:51:00,695 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_bf880bb2-0b16-4810-a187-1b93f469ecfd/bin/uautomizer/witness.graphml [2019-12-07 13:51:00,695 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-12-07 13:51:00,696 INFO L168 Benchmark]: Toolchain (without parser) took 4490.93 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 115.3 MB). Free memory was 948.9 MB in the beginning and 955.2 MB in the end (delta: -6.3 MB). Peak memory consumption was 109.1 MB. Max. memory is 11.5 GB. [2019-12-07 13:51:00,696 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 1.0 GB. Free memory is still 963.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 13:51:00,696 INFO L168 Benchmark]: CACSL2BoogieTranslator took 175.34 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 115.3 MB). Free memory was 948.9 MB in the beginning and 1.1 GB in the end (delta: -163.9 MB). Peak memory consumption was 24.4 MB. Max. memory is 11.5 GB. [2019-12-07 13:51:00,697 INFO L168 Benchmark]: Boogie Preprocessor took 22.00 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: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2019-12-07 13:51:00,697 INFO L168 Benchmark]: RCFGBuilder took 182.96 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: 21.9 MB). Peak memory consumption was 21.9 MB. Max. memory is 11.5 GB. [2019-12-07 13:51:00,697 INFO L168 Benchmark]: TraceAbstraction took 4068.47 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 961.9 MB in the end (delta: 126.3 MB). Peak memory consumption was 126.3 MB. Max. memory is 11.5 GB. [2019-12-07 13:51:00,697 INFO L168 Benchmark]: Witness Printer took 39.47 ms. Allocated memory is still 1.1 GB. Free memory was 961.9 MB in the beginning and 955.2 MB in the end (delta: 6.7 MB). Peak memory consumption was 6.7 MB. Max. memory is 11.5 GB. [2019-12-07 13:51:00,699 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 963.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 175.34 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 115.3 MB). Free memory was 948.9 MB in the beginning and 1.1 GB in the end (delta: -163.9 MB). Peak memory consumption was 24.4 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 22.00 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: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 182.96 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: 21.9 MB). Peak memory consumption was 21.9 MB. Max. memory is 11.5 GB. * TraceAbstraction took 4068.47 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 961.9 MB in the end (delta: 126.3 MB). Peak memory consumption was 126.3 MB. Max. memory is 11.5 GB. * Witness Printer took 39.47 ms. Allocated memory is still 1.1 GB. Free memory was 961.9 MB in the beginning and 955.2 MB 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: - PositiveResult [Line: 18]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 18]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 22]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 22]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 15]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 15]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 22]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 22]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 10]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - AllSpecificationsHoldResult: All specifications hold 9 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 34 locations, 9 error locations. Result: SAFE, OverallTime: 4.0s, OverallIterations: 12, TraceHistogramMax: 6, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 268 SDtfs, 159 SDslu, 585 SDs, 0 SdLazy, 555 SolverSat, 29 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 312 GetRequests, 237 SyntacticMatches, 2 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=54occurred in iteration=11, 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, 12 MinimizatonAttempts, 24 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.9s InterpolantComputationTime, 504 NumberOfCodeBlocks, 456 NumberOfCodeBlocksAsserted, 24 NumberOfCheckSat, 483 ConstructedInterpolants, 1 QuantifiedInterpolants, 58570 SizeOfPredicates, 5 NumberOfNonLiveVariables, 661 ConjunctsInSsa, 58 ConjunctsInUnsatCore, 21 InterpolantComputations, 7 PerfectInterpolantSequences, 150/459 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...