./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/termination-crafted/NonTermination3-1.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_62f73d22-e3ee-488c-b8de-822b0cc3a363/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_62f73d22-e3ee-488c-b8de-822b0cc3a363/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_62f73d22-e3ee-488c-b8de-822b0cc3a363/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_62f73d22-e3ee-488c-b8de-822b0cc3a363/bin/uautomizer/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/termination-crafted/NonTermination3-1.c -s /tmp/vcloud-vcloud-master/worker/run_dir_62f73d22-e3ee-488c-b8de-822b0cc3a363/bin/uautomizer/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_62f73d22-e3ee-488c-b8de-822b0cc3a363/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 76e89a58b9c6f7059fcf416ee7a1666558a3d440 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(valid-deref) --- Real Ultimate output --- This is Ultimate 0.1.25-f470102 [2019-12-07 16:11:18,386 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-07 16:11:18,387 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-07 16:11:18,395 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-07 16:11:18,395 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-07 16:11:18,395 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-07 16:11:18,396 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-07 16:11:18,398 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-07 16:11:18,399 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-07 16:11:18,399 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-07 16:11:18,400 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-07 16:11:18,401 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-07 16:11:18,401 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-07 16:11:18,402 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-07 16:11:18,402 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-07 16:11:18,403 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-07 16:11:18,404 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-07 16:11:18,404 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-07 16:11:18,406 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-07 16:11:18,407 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-07 16:11:18,408 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-07 16:11:18,409 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-07 16:11:18,409 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-07 16:11:18,410 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-07 16:11:18,412 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-12-07 16:11:18,412 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-12-07 16:11:18,412 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-12-07 16:11:18,412 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-12-07 16:11:18,413 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-12-07 16:11:18,413 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-12-07 16:11:18,413 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-07 16:11:18,414 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-07 16:11:18,414 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-07 16:11:18,415 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-07 16:11:18,415 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-07 16:11:18,415 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-07 16:11:18,416 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-07 16:11:18,416 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-07 16:11:18,416 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-07 16:11:18,416 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-07 16:11:18,417 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-07 16:11:18,417 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_62f73d22-e3ee-488c-b8de-822b0cc3a363/bin/uautomizer/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf [2019-12-07 16:11:18,427 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-07 16:11:18,427 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-07 16:11:18,427 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-12-07 16:11:18,428 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-12-07 16:11:18,428 INFO L138 SettingsManager]: * Use SBE=true [2019-12-07 16:11:18,428 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-07 16:11:18,428 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-12-07 16:11:18,428 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-12-07 16:11:18,428 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-07 16:11:18,428 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2019-12-07 16:11:18,429 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2019-12-07 16:11:18,429 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2019-12-07 16:11:18,429 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-12-07 16:11:18,429 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-12-07 16:11:18,429 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-07 16:11:18,429 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-07 16:11:18,429 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-12-07 16:11:18,429 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-12-07 16:11:18,430 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-12-07 16:11:18,430 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-07 16:11:18,430 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-07 16:11:18,430 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-12-07 16:11:18,430 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-12-07 16:11:18,430 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-12-07 16:11:18,430 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-12-07 16:11:18,430 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_62f73d22-e3ee-488c-b8de-822b0cc3a363/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 -> 76e89a58b9c6f7059fcf416ee7a1666558a3d440 [2019-12-07 16:11:18,529 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-07 16:11:18,539 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-07 16:11:18,542 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-07 16:11:18,543 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-07 16:11:18,544 INFO L275 PluginConnector]: CDTParser initialized [2019-12-07 16:11:18,544 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_62f73d22-e3ee-488c-b8de-822b0cc3a363/bin/uautomizer/../../sv-benchmarks/c/termination-crafted/NonTermination3-1.c [2019-12-07 16:11:18,592 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_62f73d22-e3ee-488c-b8de-822b0cc3a363/bin/uautomizer/data/007a04db8/f0f5dfc937014148846ed8392a053711/FLAG6bebbdd26 [2019-12-07 16:11:18,992 INFO L306 CDTParser]: Found 1 translation units. [2019-12-07 16:11:18,992 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_62f73d22-e3ee-488c-b8de-822b0cc3a363/sv-benchmarks/c/termination-crafted/NonTermination3-1.c [2019-12-07 16:11:18,996 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_62f73d22-e3ee-488c-b8de-822b0cc3a363/bin/uautomizer/data/007a04db8/f0f5dfc937014148846ed8392a053711/FLAG6bebbdd26 [2019-12-07 16:11:19,370 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_62f73d22-e3ee-488c-b8de-822b0cc3a363/bin/uautomizer/data/007a04db8/f0f5dfc937014148846ed8392a053711 [2019-12-07 16:11:19,373 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-07 16:11:19,375 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-12-07 16:11:19,376 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-07 16:11:19,376 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-07 16:11:19,379 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-07 16:11:19,380 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 04:11:19" (1/1) ... [2019-12-07 16:11:19,383 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ba978c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:11:19, skipping insertion in model container [2019-12-07 16:11:19,384 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 04:11:19" (1/1) ... [2019-12-07 16:11:19,389 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-07 16:11:19,400 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-07 16:11:19,513 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 16:11:19,516 INFO L203 MainTranslator]: Completed pre-run [2019-12-07 16:11:19,559 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 16:11:19,571 INFO L208 MainTranslator]: Completed translation [2019-12-07 16:11:19,572 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:11:19 WrapperNode [2019-12-07 16:11:19,572 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-07 16:11:19,572 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-07 16:11:19,572 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-07 16:11:19,572 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-07 16:11:19,580 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:11:19" (1/1) ... [2019-12-07 16:11:19,581 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:11:19" (1/1) ... [2019-12-07 16:11:19,585 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:11:19" (1/1) ... [2019-12-07 16:11:19,585 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:11:19" (1/1) ... [2019-12-07 16:11:19,589 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:11:19" (1/1) ... [2019-12-07 16:11:19,592 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:11:19" (1/1) ... [2019-12-07 16:11:19,593 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:11:19" (1/1) ... [2019-12-07 16:11:19,594 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-07 16:11:19,594 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-07 16:11:19,594 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-07 16:11:19,594 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-07 16:11:19,595 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:11:19" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_62f73d22-e3ee-488c-b8de-822b0cc3a363/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-07 16:11:19,633 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-12-07 16:11:19,633 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-07 16:11:19,633 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-12-07 16:11:19,633 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-12-07 16:11:19,633 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-12-07 16:11:19,633 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-12-07 16:11:19,633 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-12-07 16:11:19,633 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-12-07 16:11:19,633 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-12-07 16:11:19,633 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-12-07 16:11:19,634 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-07 16:11:19,763 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-07 16:11:19,763 INFO L287 CfgBuilder]: Removed 2 assume(true) statements. [2019-12-07 16:11:19,764 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 04:11:19 BoogieIcfgContainer [2019-12-07 16:11:19,764 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-07 16:11:19,765 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-12-07 16:11:19,765 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-12-07 16:11:19,767 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-12-07 16:11:19,767 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 04:11:19" (1/3) ... [2019-12-07 16:11:19,768 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36580818 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 04:11:19, skipping insertion in model container [2019-12-07 16:11:19,768 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:11:19" (2/3) ... [2019-12-07 16:11:19,768 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36580818 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 04:11:19, skipping insertion in model container [2019-12-07 16:11:19,768 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 04:11:19" (3/3) ... [2019-12-07 16:11:19,769 INFO L109 eAbstractionObserver]: Analyzing ICFG NonTermination3-1.c [2019-12-07 16:11:19,775 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-12-07 16:11:19,780 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 7 error locations. [2019-12-07 16:11:19,788 INFO L249 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2019-12-07 16:11:19,800 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-12-07 16:11:19,800 INFO L374 AbstractCegarLoop]: Hoare is false [2019-12-07 16:11:19,800 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-12-07 16:11:19,800 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-12-07 16:11:19,800 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-07 16:11:19,800 INFO L378 AbstractCegarLoop]: Difference is false [2019-12-07 16:11:19,801 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-07 16:11:19,801 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-12-07 16:11:19,810 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2019-12-07 16:11:19,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-12-07 16:11:19,815 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 16:11:19,816 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 16:11:19,816 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr6ENSURES_VIOLATIONMEMORY_LEAK, mainErr1REQUIRES_VIOLATION]=== [2019-12-07 16:11:19,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 16:11:19,820 INFO L82 PathProgramCache]: Analyzing trace with hash 1254763092, now seen corresponding path program 1 times [2019-12-07 16:11:19,825 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 16:11:19,826 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493186985] [2019-12-07 16:11:19,826 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 16:11:19,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:11:19,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:11:19,965 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 16:11:19,965 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493186985] [2019-12-07 16:11:19,966 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 16:11:19,966 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-12-07 16:11:19,966 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357805646] [2019-12-07 16:11:19,969 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-07 16:11:19,969 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 16:11:19,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-07 16:11:19,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-12-07 16:11:19,980 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 4 states. [2019-12-07 16:11:20,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 16:11:20,051 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2019-12-07 16:11:20,051 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-07 16:11:20,053 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2019-12-07 16:11:20,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 16:11:20,059 INFO L225 Difference]: With dead ends: 33 [2019-12-07 16:11:20,059 INFO L226 Difference]: Without dead ends: 30 [2019-12-07 16:11:20,060 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-12-07 16:11:20,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-12-07 16:11:20,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2019-12-07 16:11:20,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-12-07 16:11:20,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2019-12-07 16:11:20,083 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 8 [2019-12-07 16:11:20,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 16:11:20,083 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2019-12-07 16:11:20,083 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-07 16:11:20,084 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2019-12-07 16:11:20,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-12-07 16:11:20,084 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 16:11:20,084 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 16:11:20,084 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr6ENSURES_VIOLATIONMEMORY_LEAK, mainErr1REQUIRES_VIOLATION]=== [2019-12-07 16:11:20,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 16:11:20,085 INFO L82 PathProgramCache]: Analyzing trace with hash 1254763091, now seen corresponding path program 1 times [2019-12-07 16:11:20,085 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 16:11:20,085 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641712820] [2019-12-07 16:11:20,085 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 16:11:20,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:11:20,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:11:20,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 16:11:20,118 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641712820] [2019-12-07 16:11:20,118 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 16:11:20,118 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-12-07 16:11:20,118 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601706450] [2019-12-07 16:11:20,119 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-07 16:11:20,119 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 16:11:20,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-07 16:11:20,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-12-07 16:11:20,120 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand 4 states. [2019-12-07 16:11:20,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 16:11:20,151 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2019-12-07 16:11:20,151 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-07 16:11:20,151 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2019-12-07 16:11:20,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 16:11:20,152 INFO L225 Difference]: With dead ends: 24 [2019-12-07 16:11:20,152 INFO L226 Difference]: Without dead ends: 24 [2019-12-07 16:11:20,152 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-12-07 16:11:20,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-12-07 16:11:20,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2019-12-07 16:11:20,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-12-07 16:11:20,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2019-12-07 16:11:20,155 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 8 [2019-12-07 16:11:20,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 16:11:20,155 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2019-12-07 16:11:20,155 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-07 16:11:20,155 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2019-12-07 16:11:20,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-07 16:11:20,156 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 16:11:20,156 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 16:11:20,156 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr6ENSURES_VIOLATIONMEMORY_LEAK, mainErr1REQUIRES_VIOLATION]=== [2019-12-07 16:11:20,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 16:11:20,156 INFO L82 PathProgramCache]: Analyzing trace with hash 707835031, now seen corresponding path program 1 times [2019-12-07 16:11:20,156 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 16:11:20,157 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552091004] [2019-12-07 16:11:20,157 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 16:11:20,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:11:20,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:11:20,215 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 16:11:20,215 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552091004] [2019-12-07 16:11:20,215 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919285959] [2019-12-07 16:11:20,215 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_62f73d22-e3ee-488c-b8de-822b0cc3a363/bin/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 16:11:20,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:11:20,243 INFO L264 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-07 16:11:20,246 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 16:11:20,282 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 16:11:20,282 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 16:11:20,288 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 16:11:20,288 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-12-07 16:11:20,288 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2019-12-07 16:11:20,297 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 16:11:20,297 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 16:11:20,297 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 4 [2019-12-07 16:11:20,297 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137734845] [2019-12-07 16:11:20,298 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-07 16:11:20,298 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 16:11:20,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-07 16:11:20,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-12-07 16:11:20,298 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 5 states. [2019-12-07 16:11:20,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 16:11:20,346 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2019-12-07 16:11:20,347 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-07 16:11:20,347 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2019-12-07 16:11:20,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 16:11:20,347 INFO L225 Difference]: With dead ends: 30 [2019-12-07 16:11:20,347 INFO L226 Difference]: Without dead ends: 30 [2019-12-07 16:11:20,348 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 16:11:20,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-12-07 16:11:20,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2019-12-07 16:11:20,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-12-07 16:11:20,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2019-12-07 16:11:20,351 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 12 [2019-12-07 16:11:20,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 16:11:20,351 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2019-12-07 16:11:20,351 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-07 16:11:20,351 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2019-12-07 16:11:20,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-12-07 16:11:20,351 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 16:11:20,351 INFO L410 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 16:11:20,552 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 16:11:20,553 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr6ENSURES_VIOLATIONMEMORY_LEAK, mainErr1REQUIRES_VIOLATION]=== [2019-12-07 16:11:20,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 16:11:20,554 INFO L82 PathProgramCache]: Analyzing trace with hash -2098043558, now seen corresponding path program 2 times [2019-12-07 16:11:20,554 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 16:11:20,555 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928785419] [2019-12-07 16:11:20,555 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 16:11:20,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:11:20,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:11:20,756 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 16:11:20,757 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928785419] [2019-12-07 16:11:20,758 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995760141] [2019-12-07 16:11:20,758 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_62f73d22-e3ee-488c-b8de-822b0cc3a363/bin/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 16:11:20,815 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-07 16:11:20,815 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 16:11:20,816 INFO L264 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-07 16:11:20,818 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 16:11:20,827 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 16:11:20,827 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 16:11:20,835 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 16:11:20,836 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-12-07 16:11:20,836 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2019-12-07 16:11:20,921 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 16:11:20,921 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-12-07 16:11:20,921 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 9 [2019-12-07 16:11:20,922 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503640260] [2019-12-07 16:11:20,922 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-12-07 16:11:20,922 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 16:11:20,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-12-07 16:11:20,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-12-07 16:11:20,923 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 6 states. [2019-12-07 16:11:20,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 16:11:20,951 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2019-12-07 16:11:20,951 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-07 16:11:20,951 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2019-12-07 16:11:20,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 16:11:20,952 INFO L225 Difference]: With dead ends: 29 [2019-12-07 16:11:20,952 INFO L226 Difference]: Without dead ends: 29 [2019-12-07 16:11:20,952 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 16:11:20,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-12-07 16:11:20,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 26. [2019-12-07 16:11:20,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-12-07 16:11:20,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2019-12-07 16:11:20,955 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 16 [2019-12-07 16:11:20,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 16:11:20,955 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2019-12-07 16:11:20,956 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-12-07 16:11:20,956 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2019-12-07 16:11:20,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-07 16:11:20,956 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 16:11:20,956 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 16:11:21,157 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 16:11:21,158 INFO L410 AbstractCegarLoop]: === Iteration 5 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr6ENSURES_VIOLATIONMEMORY_LEAK, mainErr1REQUIRES_VIOLATION]=== [2019-12-07 16:11:21,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 16:11:21,158 INFO L82 PathProgramCache]: Analyzing trace with hash -1880246455, now seen corresponding path program 1 times [2019-12-07 16:11:21,159 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 16:11:21,159 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907756820] [2019-12-07 16:11:21,160 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 16:11:21,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:11:21,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:11:21,222 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 16:11:21,223 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907756820] [2019-12-07 16:11:21,223 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420579780] [2019-12-07 16:11:21,223 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_62f73d22-e3ee-488c-b8de-822b0cc3a363/bin/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 16:11:21,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:11:21,246 INFO L264 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-07 16:11:21,247 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 16:11:21,255 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 16:11:21,255 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 16:11:21,255 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2019-12-07 16:11:21,255 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967375849] [2019-12-07 16:11:21,256 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-07 16:11:21,256 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 16:11:21,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-07 16:11:21,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-12-07 16:11:21,256 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand 7 states. [2019-12-07 16:11:21,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 16:11:21,289 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2019-12-07 16:11:21,289 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-07 16:11:21,289 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 18 [2019-12-07 16:11:21,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 16:11:21,289 INFO L225 Difference]: With dead ends: 33 [2019-12-07 16:11:21,290 INFO L226 Difference]: Without dead ends: 33 [2019-12-07 16:11:21,290 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 16:11:21,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-12-07 16:11:21,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 30. [2019-12-07 16:11:21,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-12-07 16:11:21,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2019-12-07 16:11:21,293 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 18 [2019-12-07 16:11:21,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 16:11:21,293 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2019-12-07 16:11:21,293 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-07 16:11:21,293 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2019-12-07 16:11:21,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-12-07 16:11:21,293 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 16:11:21,294 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 16:11:21,494 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 16:11:21,495 INFO L410 AbstractCegarLoop]: === Iteration 6 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr6ENSURES_VIOLATIONMEMORY_LEAK, mainErr1REQUIRES_VIOLATION]=== [2019-12-07 16:11:21,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 16:11:21,496 INFO L82 PathProgramCache]: Analyzing trace with hash 671779276, now seen corresponding path program 2 times [2019-12-07 16:11:21,497 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 16:11:21,497 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186662346] [2019-12-07 16:11:21,497 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 16:11:21,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:11:21,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:11:21,577 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 16:11:21,577 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186662346] [2019-12-07 16:11:21,578 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833221333] [2019-12-07 16:11:21,578 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_62f73d22-e3ee-488c-b8de-822b0cc3a363/bin/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 16:11:21,600 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2019-12-07 16:11:21,600 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 16:11:21,601 INFO L264 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-07 16:11:21,602 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 16:11:21,608 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 16:11:21,608 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 16:11:21,612 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 16:11:21,612 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-12-07 16:11:21,612 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2019-12-07 16:11:21,662 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 16:11:21,662 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-12-07 16:11:21,662 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 10 [2019-12-07 16:11:21,663 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914978395] [2019-12-07 16:11:21,663 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-07 16:11:21,663 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 16:11:21,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-07 16:11:21,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2019-12-07 16:11:21,664 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 5 states. [2019-12-07 16:11:21,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 16:11:21,721 INFO L93 Difference]: Finished difference Result 33 states and 36 transitions. [2019-12-07 16:11:21,721 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-07 16:11:21,721 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2019-12-07 16:11:21,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 16:11:21,722 INFO L225 Difference]: With dead ends: 33 [2019-12-07 16:11:21,722 INFO L226 Difference]: Without dead ends: 33 [2019-12-07 16:11:21,722 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2019-12-07 16:11:21,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-12-07 16:11:21,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 31. [2019-12-07 16:11:21,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-12-07 16:11:21,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2019-12-07 16:11:21,725 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 22 [2019-12-07 16:11:21,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 16:11:21,725 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2019-12-07 16:11:21,726 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-07 16:11:21,726 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2019-12-07 16:11:21,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-12-07 16:11:21,726 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 16:11:21,726 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 16:11:21,927 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 16:11:21,928 INFO L410 AbstractCegarLoop]: === Iteration 7 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr6ENSURES_VIOLATIONMEMORY_LEAK, mainErr1REQUIRES_VIOLATION]=== [2019-12-07 16:11:21,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 16:11:21,929 INFO L82 PathProgramCache]: Analyzing trace with hash -649672835, now seen corresponding path program 1 times [2019-12-07 16:11:21,929 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 16:11:21,930 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580819443] [2019-12-07 16:11:21,930 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 16:11:21,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:11:22,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:11:22,028 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 16:11:22,029 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580819443] [2019-12-07 16:11:22,029 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 16:11:22,030 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-12-07 16:11:22,030 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130382326] [2019-12-07 16:11:22,031 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-07 16:11:22,032 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 16:11:22,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-07 16:11:22,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-12-07 16:11:22,033 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand 4 states. [2019-12-07 16:11:22,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 16:11:22,131 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2019-12-07 16:11:22,132 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-07 16:11:22,132 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2019-12-07 16:11:22,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 16:11:22,135 INFO L225 Difference]: With dead ends: 32 [2019-12-07 16:11:22,135 INFO L226 Difference]: Without dead ends: 32 [2019-12-07 16:11:22,136 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-12-07 16:11:22,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-12-07 16:11:22,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2019-12-07 16:11:22,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-12-07 16:11:22,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2019-12-07 16:11:22,148 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 23 [2019-12-07 16:11:22,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 16:11:22,149 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2019-12-07 16:11:22,149 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-07 16:11:22,150 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2019-12-07 16:11:22,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-12-07 16:11:22,152 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 16:11:22,152 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 16:11:22,153 INFO L410 AbstractCegarLoop]: === Iteration 8 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr6ENSURES_VIOLATIONMEMORY_LEAK, mainErr1REQUIRES_VIOLATION]=== [2019-12-07 16:11:22,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 16:11:22,154 INFO L82 PathProgramCache]: Analyzing trace with hash 1334976847, now seen corresponding path program 1 times [2019-12-07 16:11:22,154 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 16:11:22,155 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242164326] [2019-12-07 16:11:22,155 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 16:11:22,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:11:22,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:11:22,201 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 16:11:22,201 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242164326] [2019-12-07 16:11:22,201 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519278513] [2019-12-07 16:11:22,202 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_62f73d22-e3ee-488c-b8de-822b0cc3a363/bin/uautomizer/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 16:11:22,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:11:22,228 INFO L264 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-07 16:11:22,230 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 16:11:22,238 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 16:11:22,238 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 16:11:22,238 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2019-12-07 16:11:22,239 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278033026] [2019-12-07 16:11:22,239 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-07 16:11:22,239 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 16:11:22,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-07 16:11:22,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-12-07 16:11:22,240 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 8 states. [2019-12-07 16:11:22,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 16:11:22,276 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2019-12-07 16:11:22,276 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-07 16:11:22,276 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 24 [2019-12-07 16:11:22,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 16:11:22,277 INFO L225 Difference]: With dead ends: 39 [2019-12-07 16:11:22,277 INFO L226 Difference]: Without dead ends: 39 [2019-12-07 16:11:22,277 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-12-07 16:11:22,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-12-07 16:11:22,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 36. [2019-12-07 16:11:22,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-12-07 16:11:22,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2019-12-07 16:11:22,280 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 24 [2019-12-07 16:11:22,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 16:11:22,280 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2019-12-07 16:11:22,280 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-07 16:11:22,280 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2019-12-07 16:11:22,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-12-07 16:11:22,281 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 16:11:22,281 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 16:11:22,481 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 16:11:22,482 INFO L410 AbstractCegarLoop]: === Iteration 9 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr6ENSURES_VIOLATIONMEMORY_LEAK, mainErr1REQUIRES_VIOLATION]=== [2019-12-07 16:11:22,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 16:11:22,483 INFO L82 PathProgramCache]: Analyzing trace with hash 1360643474, now seen corresponding path program 2 times [2019-12-07 16:11:22,484 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 16:11:22,484 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191180238] [2019-12-07 16:11:22,485 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 16:11:22,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:11:22,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:11:22,561 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 16:11:22,561 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191180238] [2019-12-07 16:11:22,561 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518315889] [2019-12-07 16:11:22,561 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_62f73d22-e3ee-488c-b8de-822b0cc3a363/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 16:11:22,592 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2019-12-07 16:11:22,592 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 16:11:22,592 INFO L264 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-07 16:11:22,594 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 16:11:22,627 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 16:11:22,628 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-12-07 16:11:22,628 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 11 [2019-12-07 16:11:22,628 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343787036] [2019-12-07 16:11:22,628 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-07 16:11:22,628 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 16:11:22,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-07 16:11:22,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2019-12-07 16:11:22,628 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 5 states. [2019-12-07 16:11:22,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 16:11:22,645 INFO L93 Difference]: Finished difference Result 35 states and 37 transitions. [2019-12-07 16:11:22,645 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-07 16:11:22,645 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 28 [2019-12-07 16:11:22,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 16:11:22,645 INFO L225 Difference]: With dead ends: 35 [2019-12-07 16:11:22,645 INFO L226 Difference]: Without dead ends: 32 [2019-12-07 16:11:22,646 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 27 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 16:11:22,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-12-07 16:11:22,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2019-12-07 16:11:22,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-12-07 16:11:22,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2019-12-07 16:11:22,648 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 28 [2019-12-07 16:11:22,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 16:11:22,648 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2019-12-07 16:11:22,648 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-07 16:11:22,648 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2019-12-07 16:11:22,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-12-07 16:11:22,649 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 16:11:22,649 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 16:11:22,849 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 16:11:22,850 INFO L410 AbstractCegarLoop]: === Iteration 10 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr6ENSURES_VIOLATIONMEMORY_LEAK, mainErr1REQUIRES_VIOLATION]=== [2019-12-07 16:11:22,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 16:11:22,851 INFO L82 PathProgramCache]: Analyzing trace with hash -775549161, now seen corresponding path program 1 times [2019-12-07 16:11:22,851 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 16:11:22,852 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241099250] [2019-12-07 16:11:22,852 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 16:11:22,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:11:22,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:11:22,933 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 16:11:22,934 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241099250] [2019-12-07 16:11:22,934 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647673878] [2019-12-07 16:11:22,934 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_62f73d22-e3ee-488c-b8de-822b0cc3a363/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 16:11:22,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:11:22,964 INFO L264 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-07 16:11:22,965 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 16:11:22,972 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 16:11:22,972 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 16:11:22,972 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2019-12-07 16:11:22,973 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257674305] [2019-12-07 16:11:22,973 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-07 16:11:22,973 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 16:11:22,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-07 16:11:22,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-12-07 16:11:22,973 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 9 states. [2019-12-07 16:11:23,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 16:11:23,003 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2019-12-07 16:11:23,003 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-07 16:11:23,003 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 29 [2019-12-07 16:11:23,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 16:11:23,004 INFO L225 Difference]: With dead ends: 37 [2019-12-07 16:11:23,004 INFO L226 Difference]: Without dead ends: 37 [2019-12-07 16:11:23,004 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-12-07 16:11:23,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-12-07 16:11:23,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 34. [2019-12-07 16:11:23,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-12-07 16:11:23,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2019-12-07 16:11:23,006 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 29 [2019-12-07 16:11:23,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 16:11:23,007 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2019-12-07 16:11:23,007 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-07 16:11:23,007 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2019-12-07 16:11:23,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-12-07 16:11:23,007 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 16:11:23,007 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 16:11:23,208 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 16:11:23,209 INFO L410 AbstractCegarLoop]: === Iteration 11 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr6ENSURES_VIOLATIONMEMORY_LEAK, mainErr1REQUIRES_VIOLATION]=== [2019-12-07 16:11:23,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 16:11:23,210 INFO L82 PathProgramCache]: Analyzing trace with hash -105276236, now seen corresponding path program 2 times [2019-12-07 16:11:23,210 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 16:11:23,210 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205613296] [2019-12-07 16:11:23,211 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 16:11:23,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:11:23,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:11:23,296 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 16:11:23,296 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205613296] [2019-12-07 16:11:23,296 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553627476] [2019-12-07 16:11:23,296 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_62f73d22-e3ee-488c-b8de-822b0cc3a363/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 16:11:23,321 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-07 16:11:23,321 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 16:11:23,322 INFO L264 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-07 16:11:23,323 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 16:11:23,331 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 16:11:23,331 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 16:11:23,331 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2019-12-07 16:11:23,332 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551770575] [2019-12-07 16:11:23,332 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-07 16:11:23,332 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 16:11:23,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-07 16:11:23,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2019-12-07 16:11:23,332 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand 10 states. [2019-12-07 16:11:23,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 16:11:23,369 INFO L93 Difference]: Finished difference Result 41 states and 42 transitions. [2019-12-07 16:11:23,369 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-07 16:11:23,369 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 33 [2019-12-07 16:11:23,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 16:11:23,369 INFO L225 Difference]: With dead ends: 41 [2019-12-07 16:11:23,369 INFO L226 Difference]: Without dead ends: 41 [2019-12-07 16:11:23,370 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 34 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 16:11:23,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-12-07 16:11:23,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 38. [2019-12-07 16:11:23,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-12-07 16:11:23,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2019-12-07 16:11:23,372 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 33 [2019-12-07 16:11:23,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 16:11:23,372 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2019-12-07 16:11:23,372 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-07 16:11:23,372 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2019-12-07 16:11:23,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-12-07 16:11:23,373 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 16:11:23,373 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 16:11:23,573 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 16:11:23,574 INFO L410 AbstractCegarLoop]: === Iteration 12 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr6ENSURES_VIOLATIONMEMORY_LEAK, mainErr1REQUIRES_VIOLATION]=== [2019-12-07 16:11:23,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 16:11:23,574 INFO L82 PathProgramCache]: Analyzing trace with hash -1144843311, now seen corresponding path program 3 times [2019-12-07 16:11:23,574 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 16:11:23,574 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171098372] [2019-12-07 16:11:23,574 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 16:11:23,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:11:23,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:11:23,629 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 16:11:23,629 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171098372] [2019-12-07 16:11:23,629 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696515312] [2019-12-07 16:11:23,629 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_62f73d22-e3ee-488c-b8de-822b0cc3a363/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 16:11:23,669 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2019-12-07 16:11:23,670 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 16:11:23,670 INFO L264 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-07 16:11:23,672 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 16:11:23,683 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 16:11:23,683 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 16:11:23,683 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2019-12-07 16:11:23,684 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49318461] [2019-12-07 16:11:23,684 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-12-07 16:11:23,684 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 16:11:23,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-12-07 16:11:23,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2019-12-07 16:11:23,684 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 11 states. [2019-12-07 16:11:23,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 16:11:23,724 INFO L93 Difference]: Finished difference Result 45 states and 46 transitions. [2019-12-07 16:11:23,724 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-07 16:11:23,724 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 37 [2019-12-07 16:11:23,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 16:11:23,725 INFO L225 Difference]: With dead ends: 45 [2019-12-07 16:11:23,725 INFO L226 Difference]: Without dead ends: 45 [2019-12-07 16:11:23,725 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2019-12-07 16:11:23,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-12-07 16:11:23,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 42. [2019-12-07 16:11:23,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-12-07 16:11:23,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2019-12-07 16:11:23,728 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 37 [2019-12-07 16:11:23,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 16:11:23,728 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2019-12-07 16:11:23,728 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-12-07 16:11:23,728 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2019-12-07 16:11:23,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-12-07 16:11:23,729 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 16:11:23,729 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 16:11:23,929 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 16:11:23,930 INFO L410 AbstractCegarLoop]: === Iteration 13 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr6ENSURES_VIOLATIONMEMORY_LEAK, mainErr1REQUIRES_VIOLATION]=== [2019-12-07 16:11:23,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 16:11:23,931 INFO L82 PathProgramCache]: Analyzing trace with hash -539904914, now seen corresponding path program 4 times [2019-12-07 16:11:23,931 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 16:11:23,932 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736182065] [2019-12-07 16:11:23,932 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 16:11:23,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:11:24,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:11:24,036 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 16:11:24,036 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736182065] [2019-12-07 16:11:24,036 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700224465] [2019-12-07 16:11:24,036 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_62f73d22-e3ee-488c-b8de-822b0cc3a363/bin/uautomizer/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 16:11:24,076 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-07 16:11:24,076 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 16:11:24,077 INFO L264 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-07 16:11:24,079 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 16:11:24,090 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 16:11:24,090 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 16:11:24,090 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2019-12-07 16:11:24,091 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801437386] [2019-12-07 16:11:24,091 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-07 16:11:24,091 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 16:11:24,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-07 16:11:24,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-12-07 16:11:24,091 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 12 states. [2019-12-07 16:11:24,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 16:11:24,131 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2019-12-07 16:11:24,132 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-07 16:11:24,132 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 41 [2019-12-07 16:11:24,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 16:11:24,132 INFO L225 Difference]: With dead ends: 49 [2019-12-07 16:11:24,132 INFO L226 Difference]: Without dead ends: 49 [2019-12-07 16:11:24,133 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-12-07 16:11:24,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2019-12-07 16:11:24,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 46. [2019-12-07 16:11:24,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-12-07 16:11:24,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2019-12-07 16:11:24,136 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 41 [2019-12-07 16:11:24,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 16:11:24,136 INFO L462 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2019-12-07 16:11:24,136 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-07 16:11:24,136 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2019-12-07 16:11:24,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-12-07 16:11:24,136 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 16:11:24,136 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 16:11:24,337 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 16:11:24,337 INFO L410 AbstractCegarLoop]: === Iteration 14 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr6ENSURES_VIOLATIONMEMORY_LEAK, mainErr1REQUIRES_VIOLATION]=== [2019-12-07 16:11:24,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 16:11:24,337 INFO L82 PathProgramCache]: Analyzing trace with hash 607436427, now seen corresponding path program 5 times [2019-12-07 16:11:24,338 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 16:11:24,338 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602622031] [2019-12-07 16:11:24,338 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 16:11:24,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:11:24,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:11:24,405 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 16:11:24,405 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602622031] [2019-12-07 16:11:24,405 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476658333] [2019-12-07 16:11:24,405 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_62f73d22-e3ee-488c-b8de-822b0cc3a363/bin/uautomizer/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 16:11:24,442 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2019-12-07 16:11:24,442 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 16:11:24,443 INFO L264 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-07 16:11:24,444 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 16:11:24,454 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 16:11:24,454 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 16:11:24,454 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2019-12-07 16:11:24,454 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106912660] [2019-12-07 16:11:24,455 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-07 16:11:24,455 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 16:11:24,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-07 16:11:24,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-12-07 16:11:24,455 INFO L87 Difference]: Start difference. First operand 46 states and 47 transitions. Second operand 13 states. [2019-12-07 16:11:24,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 16:11:24,493 INFO L93 Difference]: Finished difference Result 53 states and 54 transitions. [2019-12-07 16:11:24,493 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-07 16:11:24,493 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 45 [2019-12-07 16:11:24,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 16:11:24,494 INFO L225 Difference]: With dead ends: 53 [2019-12-07 16:11:24,494 INFO L226 Difference]: Without dead ends: 53 [2019-12-07 16:11:24,494 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-12-07 16:11:24,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-12-07 16:11:24,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 50. [2019-12-07 16:11:24,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-12-07 16:11:24,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2019-12-07 16:11:24,497 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 45 [2019-12-07 16:11:24,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 16:11:24,497 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2019-12-07 16:11:24,498 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-07 16:11:24,498 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2019-12-07 16:11:24,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-12-07 16:11:24,498 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 16:11:24,498 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 16:11:24,699 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 16:11:24,700 INFO L410 AbstractCegarLoop]: === Iteration 15 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr6ENSURES_VIOLATIONMEMORY_LEAK, mainErr1REQUIRES_VIOLATION]=== [2019-12-07 16:11:24,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 16:11:24,701 INFO L82 PathProgramCache]: Analyzing trace with hash 228291112, now seen corresponding path program 6 times [2019-12-07 16:11:24,701 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 16:11:24,701 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352977779] [2019-12-07 16:11:24,702 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 16:11:24,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:11:24,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:11:24,976 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 16:11:24,976 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352977779] [2019-12-07 16:11:24,976 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982940576] [2019-12-07 16:11:24,976 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_62f73d22-e3ee-488c-b8de-822b0cc3a363/bin/uautomizer/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 16:11:25,049 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2019-12-07 16:11:25,049 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 16:11:25,050 INFO L264 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-07 16:11:25,052 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 16:11:25,065 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 16:11:25,065 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 16:11:25,065 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2019-12-07 16:11:25,065 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562909300] [2019-12-07 16:11:25,066 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-07 16:11:25,066 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 16:11:25,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-07 16:11:25,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2019-12-07 16:11:25,066 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand 14 states. [2019-12-07 16:11:25,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 16:11:25,117 INFO L93 Difference]: Finished difference Result 54 states and 55 transitions. [2019-12-07 16:11:25,117 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-12-07 16:11:25,117 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 49 [2019-12-07 16:11:25,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 16:11:25,118 INFO L225 Difference]: With dead ends: 54 [2019-12-07 16:11:25,118 INFO L226 Difference]: Without dead ends: 54 [2019-12-07 16:11:25,118 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2019-12-07 16:11:25,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-12-07 16:11:25,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2019-12-07 16:11:25,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-12-07 16:11:25,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2019-12-07 16:11:25,122 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 49 [2019-12-07 16:11:25,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 16:11:25,122 INFO L462 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2019-12-07 16:11:25,122 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-07 16:11:25,122 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2019-12-07 16:11:25,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2019-12-07 16:11:25,123 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 16:11:25,123 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 16:11:25,324 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 16:11:25,325 INFO L410 AbstractCegarLoop]: === Iteration 16 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr6ENSURES_VIOLATIONMEMORY_LEAK, mainErr1REQUIRES_VIOLATION]=== [2019-12-07 16:11:25,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 16:11:25,325 INFO L82 PathProgramCache]: Analyzing trace with hash -1223356603, now seen corresponding path program 7 times [2019-12-07 16:11:25,326 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 16:11:25,326 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64547790] [2019-12-07 16:11:25,326 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 16:11:25,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 16:11:25,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 16:11:25,414 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-12-07 16:11:25,414 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-12-07 16:11:25,439 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.12 04:11:25 BoogieIcfgContainer [2019-12-07 16:11:25,439 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-12-07 16:11:25,439 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-12-07 16:11:25,439 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-12-07 16:11:25,440 INFO L275 PluginConnector]: Witness Printer initialized [2019-12-07 16:11:25,440 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 04:11:19" (3/4) ... [2019-12-07 16:11:25,441 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-12-07 16:11:25,476 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_62f73d22-e3ee-488c-b8de-822b0cc3a363/bin/uautomizer/witness.graphml [2019-12-07 16:11:25,476 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-12-07 16:11:25,477 INFO L168 Benchmark]: Toolchain (without parser) took 6102.88 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 168.8 MB). Free memory was 939.3 MB in the beginning and 1.2 GB in the end (delta: -213.1 MB). There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 16:11:25,477 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 955.4 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 16:11:25,477 INFO L168 Benchmark]: CACSL2BoogieTranslator took 196.52 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 134.2 MB). Free memory was 939.3 MB in the beginning and 1.1 GB in the end (delta: -191.1 MB). Peak memory consumption was 23.1 MB. Max. memory is 11.5 GB. [2019-12-07 16:11:25,478 INFO L168 Benchmark]: Boogie Preprocessor took 21.49 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2019-12-07 16:11:25,478 INFO L168 Benchmark]: RCFGBuilder took 170.53 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 21.9 MB). Peak memory consumption was 21.9 MB. Max. memory is 11.5 GB. [2019-12-07 16:11:25,478 INFO L168 Benchmark]: TraceAbstraction took 5674.22 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 34.6 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -48.6 MB). There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 16:11:25,478 INFO L168 Benchmark]: Witness Printer took 36.51 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 11.5 GB. [2019-12-07 16:11:25,480 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 955.4 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 196.52 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 134.2 MB). Free memory was 939.3 MB in the beginning and 1.1 GB in the end (delta: -191.1 MB). Peak memory consumption was 23.1 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 21.49 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 170.53 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 21.9 MB). Peak memory consumption was 21.9 MB. Max. memory is 11.5 GB. * TraceAbstraction took 5674.22 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 34.6 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -48.6 MB). There was no memory consumed. Max. memory is 11.5 GB. * Witness Printer took 36.51 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 20]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L10] int i = __VERIFIER_nondet_int(); [L11] int a[10]; [L13] int n = 0; VAL [a={2:0}, i=0, n=0] [L13] COND TRUE n < 10 [L14] a[n] = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=0, a={2:0}, i=0, n=0] [L13] ++n VAL [a={2:0}, i=0, n=1] [L13] COND TRUE n < 10 [L14] a[n] = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=0, a={2:0}, i=0, n=1] [L13] ++n VAL [a={2:0}, i=0, n=2] [L13] COND TRUE n < 10 [L14] a[n] = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=0, a={2:0}, i=0, n=2] [L13] ++n VAL [a={2:0}, i=0, n=3] [L13] COND TRUE n < 10 [L14] a[n] = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=0, a={2:0}, i=0, n=3] [L13] ++n VAL [a={2:0}, i=0, n=4] [L13] COND TRUE n < 10 [L14] a[n] = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=0, a={2:0}, i=0, n=4] [L13] ++n VAL [a={2:0}, i=0, n=5] [L13] COND TRUE n < 10 [L14] a[n] = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=0, a={2:0}, i=0, n=5] [L13] ++n VAL [a={2:0}, i=0, n=6] [L13] COND TRUE n < 10 [L14] a[n] = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=0, a={2:0}, i=0, n=6] [L13] ++n VAL [a={2:0}, i=0, n=7] [L13] COND TRUE n < 10 [L14] a[n] = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=0, a={2:0}, i=0, n=7] [L13] ++n VAL [a={2:0}, i=0, n=8] [L13] COND TRUE n < 10 [L14] a[n] = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=0, a={2:0}, i=0, n=8] [L13] ++n VAL [a={2:0}, i=0, n=9] [L13] COND TRUE n < 10 [L14] a[n] = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=0, a={2:0}, i=0, n=9] [L13] ++n VAL [a={2:0}, i=0, n=10] [L13] COND FALSE !(n < 10) VAL [a={2:0}, i=0, n=10] [L17] 0 <= i && i < 10 && a[i] >= 0 VAL [0 <= i && i < 10 && a[i] >= 0=1, a={2:0}, i=0, n=10] [L17] EXPR a[i] VAL [0 <= i && i < 10 && a[i] >= 0=1, a={2:0}, a[i]=0, i=0, n=10] [L17] 0 <= i && i < 10 && a[i] >= 0 VAL [0 <= i && i < 10 && a[i] >= 0=1, a={2:0}, a[i]=0, i=0, n=10] [L17] COND TRUE 0 <= i && i < 10 && a[i] >= 0 [L18] i = __VERIFIER_nondet_int() [L20] a[i] = 0 - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 28 locations, 7 error locations. Result: UNSAFE, OverallTime: 5.6s, OverallIterations: 16, TraceHistogramMax: 10, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 236 SDtfs, 208 SDslu, 698 SDs, 0 SdLazy, 662 SolverSat, 35 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 469 GetRequests, 363 SyntacticMatches, 3 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=54occurred in iteration=15, 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, 15 MinimizatonAttempts, 33 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 1.4s InterpolantComputationTime, 800 NumberOfCodeBlocks, 772 NumberOfCodeBlocksAsserted, 54 NumberOfCheckSat, 720 ConstructedInterpolants, 1 QuantifiedInterpolants, 70815 SizeOfPredicates, 9 NumberOfNonLiveVariables, 1149 ConjunctsInSsa, 88 ConjunctsInUnsatCore, 27 InterpolantComputations, 6 PerfectInterpolantSequences, 66/1169 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...