./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 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_91e39425-605d-4ea2-a097-7bcd2c0e02fd/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_91e39425-605d-4ea2-a097-7bcd2c0e02fd/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_91e39425-605d-4ea2-a097-7bcd2c0e02fd/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_91e39425-605d-4ea2-a097-7bcd2c0e02fd/bin/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/termination-crafted/NonTermination3-1.c -s /tmp/vcloud-vcloud-master/worker/run_dir_91e39425-605d-4ea2-a097-7bcd2c0e02fd/bin/utaipan/config/svcomp-DerefFreeMemtrack-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_91e39425-605d-4ea2-a097-7bcd2c0e02fd/bin/utaipan --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 Taipan --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 0.2.0-7b2dab5 [2020-12-09 17:03:38,532 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 17:03:38,534 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 17:03:38,563 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 17:03:38,563 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 17:03:38,565 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 17:03:38,567 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 17:03:38,569 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 17:03:38,571 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 17:03:38,572 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 17:03:38,573 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 17:03:38,575 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 17:03:38,575 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 17:03:38,576 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 17:03:38,578 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 17:03:38,579 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 17:03:38,580 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 17:03:38,581 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 17:03:38,583 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 17:03:38,585 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 17:03:38,587 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 17:03:38,589 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 17:03:38,590 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 17:03:38,591 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 17:03:38,594 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 17:03:38,594 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 17:03:38,595 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 17:03:38,596 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 17:03:38,596 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 17:03:38,598 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 17:03:38,598 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 17:03:38,599 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 17:03:38,600 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 17:03:38,600 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 17:03:38,601 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 17:03:38,601 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 17:03:38,602 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 17:03:38,602 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 17:03:38,602 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 17:03:38,603 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 17:03:38,603 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 17:03:38,604 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_91e39425-605d-4ea2-a097-7bcd2c0e02fd/bin/utaipan/config/svcomp-DerefFreeMemtrack-64bit-Taipan_Default.epf [2020-12-09 17:03:38,626 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 17:03:38,626 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 17:03:38,627 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 17:03:38,627 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 17:03:38,627 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 17:03:38,628 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 17:03:38,628 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-09 17:03:38,628 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 17:03:38,628 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 17:03:38,628 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-09 17:03:38,628 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-09 17:03:38,629 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 17:03:38,629 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-09 17:03:38,629 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-09 17:03:38,629 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-09 17:03:38,630 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-09 17:03:38,630 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-09 17:03:38,630 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 17:03:38,631 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-12-09 17:03:38,631 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 17:03:38,631 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 17:03:38,631 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-12-09 17:03:38,631 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-12-09 17:03:38,632 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-12-09 17:03:38,632 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 17:03:38,632 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 17:03:38,632 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 17:03:38,632 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 17:03:38,633 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 17:03:38,633 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 17:03:38,633 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 17:03:38,633 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 17:03:38,633 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-09 17:03:38,634 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-09 17:03:38,634 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 17:03:38,634 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 17:03:38,634 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud-vcloud-master/worker/run_dir_91e39425-605d-4ea2-a097-7bcd2c0e02fd/bin/utaipan/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_91e39425-605d-4ea2-a097-7bcd2c0e02fd/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 76e89a58b9c6f7059fcf416ee7a1666558a3d440 [2020-12-09 17:03:38,804 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 17:03:38,823 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 17:03:38,825 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 17:03:38,826 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 17:03:38,827 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 17:03:38,827 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_91e39425-605d-4ea2-a097-7bcd2c0e02fd/bin/utaipan/../../sv-benchmarks/c/termination-crafted/NonTermination3-1.c [2020-12-09 17:03:38,875 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_91e39425-605d-4ea2-a097-7bcd2c0e02fd/bin/utaipan/data/8d6899889/1f867680e58648859c5cce03bf28d3ff/FLAGa4c5127f1 [2020-12-09 17:03:39,231 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 17:03:39,231 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_91e39425-605d-4ea2-a097-7bcd2c0e02fd/sv-benchmarks/c/termination-crafted/NonTermination3-1.c [2020-12-09 17:03:39,236 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_91e39425-605d-4ea2-a097-7bcd2c0e02fd/bin/utaipan/data/8d6899889/1f867680e58648859c5cce03bf28d3ff/FLAGa4c5127f1 [2020-12-09 17:03:39,245 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_91e39425-605d-4ea2-a097-7bcd2c0e02fd/bin/utaipan/data/8d6899889/1f867680e58648859c5cce03bf28d3ff [2020-12-09 17:03:39,247 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 17:03:39,248 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 17:03:39,249 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 17:03:39,249 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 17:03:39,252 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 17:03:39,252 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 05:03:39" (1/1) ... [2020-12-09 17:03:39,253 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7715b7d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:03:39, skipping insertion in model container [2020-12-09 17:03:39,254 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 05:03:39" (1/1) ... [2020-12-09 17:03:39,258 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 17:03:39,266 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 17:03:39,360 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 17:03:39,364 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 17:03:39,386 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 17:03:39,403 INFO L208 MainTranslator]: Completed translation [2020-12-09 17:03:39,404 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:03:39 WrapperNode [2020-12-09 17:03:39,404 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 17:03:39,405 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 17:03:39,405 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 17:03:39,406 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 17:03:39,413 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:03:39" (1/1) ... [2020-12-09 17:03:39,420 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:03:39" (1/1) ... [2020-12-09 17:03:39,440 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 17:03:39,441 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 17:03:39,441 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 17:03:39,441 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 17:03:39,449 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:03:39" (1/1) ... [2020-12-09 17:03:39,449 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:03:39" (1/1) ... [2020-12-09 17:03:39,451 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:03:39" (1/1) ... [2020-12-09 17:03:39,451 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:03:39" (1/1) ... [2020-12-09 17:03:39,455 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:03:39" (1/1) ... [2020-12-09 17:03:39,459 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:03:39" (1/1) ... [2020-12-09 17:03:39,460 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:03:39" (1/1) ... [2020-12-09 17:03:39,462 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 17:03:39,463 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 17:03:39,463 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 17:03:39,463 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 17:03:39,464 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:03:39" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_91e39425-605d-4ea2-a097-7bcd2c0e02fd/bin/utaipan/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 [2020-12-09 17:03:39,522 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-09 17:03:39,522 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 17:03:39,522 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 17:03:39,522 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-09 17:03:39,523 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 17:03:39,523 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-09 17:03:39,704 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 17:03:39,705 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2020-12-09 17:03:39,706 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 05:03:39 BoogieIcfgContainer [2020-12-09 17:03:39,706 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 17:03:39,708 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 17:03:39,708 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 17:03:39,711 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 17:03:39,712 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 05:03:39" (1/3) ... [2020-12-09 17:03:39,712 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b38c461 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 05:03:39, skipping insertion in model container [2020-12-09 17:03:39,713 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:03:39" (2/3) ... [2020-12-09 17:03:39,713 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b38c461 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 05:03:39, skipping insertion in model container [2020-12-09 17:03:39,713 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 05:03:39" (3/3) ... [2020-12-09 17:03:39,715 INFO L111 eAbstractionObserver]: Analyzing ICFG NonTermination3-1.c [2020-12-09 17:03:39,728 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 17:03:39,731 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 7 error locations. [2020-12-09 17:03:39,739 INFO L253 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2020-12-09 17:03:39,754 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 17:03:39,754 INFO L378 AbstractCegarLoop]: Hoare is false [2020-12-09 17:03:39,754 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 17:03:39,754 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 17:03:39,754 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 17:03:39,754 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 17:03:39,754 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 17:03:39,754 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 17:03:39,766 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2020-12-09 17:03:39,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-12-09 17:03:39,772 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 17:03:39,772 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-12-09 17:03:39,772 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-09 17:03:39,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 17:03:39,776 INFO L82 PathProgramCache]: Analyzing trace with hash 79124, now seen corresponding path program 1 times [2020-12-09 17:03:39,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 17:03:39,785 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881410148] [2020-12-09 17:03:39,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 17:03:39,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:03:39,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 17:03:39,898 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881410148] [2020-12-09 17:03:39,898 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 17:03:39,898 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-12-09 17:03:39,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096721539] [2020-12-09 17:03:39,902 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 17:03:39,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 17:03:39,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 17:03:39,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 17:03:39,915 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 3 states. [2020-12-09 17:03:39,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 17:03:39,944 INFO L93 Difference]: Finished difference Result 15 states and 17 transitions. [2020-12-09 17:03:39,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 17:03:39,946 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2020-12-09 17:03:39,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 17:03:39,951 INFO L225 Difference]: With dead ends: 15 [2020-12-09 17:03:39,951 INFO L226 Difference]: Without dead ends: 14 [2020-12-09 17:03:39,953 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 17:03:39,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-12-09 17:03:39,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-12-09 17:03:39,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-12-09 17:03:39,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2020-12-09 17:03:39,974 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 3 [2020-12-09 17:03:39,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 17:03:39,974 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2020-12-09 17:03:39,974 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 17:03:39,975 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2020-12-09 17:03:39,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-12-09 17:03:39,975 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 17:03:39,975 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-12-09 17:03:39,975 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-09 17:03:39,975 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-09 17:03:39,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 17:03:39,976 INFO L82 PathProgramCache]: Analyzing trace with hash 79125, now seen corresponding path program 1 times [2020-12-09 17:03:39,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 17:03:39,976 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725072017] [2020-12-09 17:03:39,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 17:03:39,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:03:40,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 17:03:40,009 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725072017] [2020-12-09 17:03:40,010 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 17:03:40,010 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-12-09 17:03:40,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435815931] [2020-12-09 17:03:40,011 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 17:03:40,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 17:03:40,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 17:03:40,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 17:03:40,012 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand 3 states. [2020-12-09 17:03:40,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 17:03:40,034 INFO L93 Difference]: Finished difference Result 16 states and 18 transitions. [2020-12-09 17:03:40,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 17:03:40,035 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2020-12-09 17:03:40,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 17:03:40,035 INFO L225 Difference]: With dead ends: 16 [2020-12-09 17:03:40,035 INFO L226 Difference]: Without dead ends: 16 [2020-12-09 17:03:40,036 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 17:03:40,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-12-09 17:03:40,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-12-09 17:03:40,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-12-09 17:03:40,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2020-12-09 17:03:40,039 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 3 [2020-12-09 17:03:40,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 17:03:40,040 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2020-12-09 17:03:40,040 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 17:03:40,040 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2020-12-09 17:03:40,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-12-09 17:03:40,040 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 17:03:40,040 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1] [2020-12-09 17:03:40,040 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-09 17:03:40,041 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-09 17:03:40,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 17:03:40,041 INFO L82 PathProgramCache]: Analyzing trace with hash 76077888, now seen corresponding path program 1 times [2020-12-09 17:03:40,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 17:03:40,042 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542351007] [2020-12-09 17:03:40,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 17:03:40,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:03:40,103 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 17:03:40,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542351007] [2020-12-09 17:03:40,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195843534] [2020-12-09 17:03:40,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_91e39425-605d-4ea2-a097-7bcd2c0e02fd/bin/utaipan/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 [2020-12-09 17:03:40,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:03:40,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-09 17:03:40,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 17:03:40,190 INFO L382 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 [2020-12-09 17:03:40,191 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 17:03:40,198 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 17:03:40,199 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-09 17:03:40,200 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2020-12-09 17:03:40,214 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 17:03:40,215 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 17:03:40,241 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 17:03:40,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1295364831] [2020-12-09 17:03:40,260 INFO L159 IcfgInterpreter]: Started Sifa with 4 locations of interest [2020-12-09 17:03:40,260 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 17:03:40,263 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 17:03:40,267 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 17:03:40,267 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 17:03:40,615 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 17:03:40,797 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 55 [2020-12-09 17:03:40,839 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 17:03:40,839 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 17:03:40,839 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 4 [2020-12-09 17:03:40,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877435782] [2020-12-09 17:03:40,840 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-09 17:03:40,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 17:03:40,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-09 17:03:40,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-12-09 17:03:40,841 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 6 states. [2020-12-09 17:03:40,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 17:03:40,907 INFO L93 Difference]: Finished difference Result 38 states and 46 transitions. [2020-12-09 17:03:40,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-09 17:03:40,907 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 5 [2020-12-09 17:03:40,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 17:03:40,908 INFO L225 Difference]: With dead ends: 38 [2020-12-09 17:03:40,908 INFO L226 Difference]: Without dead ends: 38 [2020-12-09 17:03:40,908 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-12-09 17:03:40,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-12-09 17:03:40,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 22. [2020-12-09 17:03:40,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-12-09 17:03:40,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2020-12-09 17:03:40,911 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 5 [2020-12-09 17:03:40,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 17:03:40,911 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2020-12-09 17:03:40,911 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-09 17:03:40,912 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2020-12-09 17:03:40,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-09 17:03:40,912 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 17:03:40,912 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2020-12-09 17:03:41,112 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-12-09 17:03:41,113 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-09 17:03:41,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 17:03:41,113 INFO L82 PathProgramCache]: Analyzing trace with hash -1804189333, now seen corresponding path program 1 times [2020-12-09 17:03:41,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 17:03:41,114 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597901303] [2020-12-09 17:03:41,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 17:03:41,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:03:41,167 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-09 17:03:41,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597901303] [2020-12-09 17:03:41,168 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 17:03:41,168 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 17:03:41,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403533515] [2020-12-09 17:03:41,168 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 17:03:41,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 17:03:41,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 17:03:41,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-09 17:03:41,169 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 5 states. [2020-12-09 17:03:41,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 17:03:41,215 INFO L93 Difference]: Finished difference Result 25 states and 31 transitions. [2020-12-09 17:03:41,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 17:03:41,215 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2020-12-09 17:03:41,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 17:03:41,216 INFO L225 Difference]: With dead ends: 25 [2020-12-09 17:03:41,216 INFO L226 Difference]: Without dead ends: 25 [2020-12-09 17:03:41,216 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-12-09 17:03:41,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-12-09 17:03:41,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 21. [2020-12-09 17:03:41,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-12-09 17:03:41,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2020-12-09 17:03:41,219 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 9 [2020-12-09 17:03:41,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 17:03:41,219 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2020-12-09 17:03:41,220 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 17:03:41,220 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2020-12-09 17:03:41,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-09 17:03:41,220 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 17:03:41,220 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2020-12-09 17:03:41,220 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-12-09 17:03:41,220 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-09 17:03:41,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 17:03:41,221 INFO L82 PathProgramCache]: Analyzing trace with hash -95288389, now seen corresponding path program 1 times [2020-12-09 17:03:41,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 17:03:41,221 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134434585] [2020-12-09 17:03:41,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 17:03:41,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:03:41,242 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-09 17:03:41,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134434585] [2020-12-09 17:03:41,243 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 17:03:41,243 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 17:03:41,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081733643] [2020-12-09 17:03:41,243 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 17:03:41,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 17:03:41,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 17:03:41,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 17:03:41,244 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 3 states. [2020-12-09 17:03:41,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 17:03:41,253 INFO L93 Difference]: Finished difference Result 22 states and 26 transitions. [2020-12-09 17:03:41,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 17:03:41,253 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-12-09 17:03:41,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 17:03:41,255 INFO L225 Difference]: With dead ends: 22 [2020-12-09 17:03:41,255 INFO L226 Difference]: Without dead ends: 22 [2020-12-09 17:03:41,255 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 17:03:41,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-12-09 17:03:41,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-12-09 17:03:41,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-12-09 17:03:41,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2020-12-09 17:03:41,257 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 10 [2020-12-09 17:03:41,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 17:03:41,258 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2020-12-09 17:03:41,258 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 17:03:41,258 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2020-12-09 17:03:41,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-09 17:03:41,258 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 17:03:41,258 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 17:03:41,258 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-12-09 17:03:41,258 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-09 17:03:41,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 17:03:41,259 INFO L82 PathProgramCache]: Analyzing trace with hash 1341025486, now seen corresponding path program 1 times [2020-12-09 17:03:41,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 17:03:41,259 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939094231] [2020-12-09 17:03:41,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 17:03:41,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:03:41,288 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 17:03:41,288 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939094231] [2020-12-09 17:03:41,288 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073259449] [2020-12-09 17:03:41,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_91e39425-605d-4ea2-a097-7bcd2c0e02fd/bin/utaipan/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 [2020-12-09 17:03:41,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:03:41,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-09 17:03:41,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 17:03:41,331 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 17:03:41,331 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 17:03:41,362 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 17:03:41,363 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [801576455] [2020-12-09 17:03:41,365 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2020-12-09 17:03:41,365 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 17:03:41,365 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 17:03:41,365 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 17:03:41,366 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 17:03:41,638 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 17:03:41,825 WARN L197 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 55 [2020-12-09 17:03:42,303 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 17:03:42,303 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 17:03:42,303 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2020-12-09 17:03:42,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797782792] [2020-12-09 17:03:42,303 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-09 17:03:42,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 17:03:42,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-09 17:03:42,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2020-12-09 17:03:42,304 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 9 states. [2020-12-09 17:03:42,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 17:03:42,333 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2020-12-09 17:03:42,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-09 17:03:42,333 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 11 [2020-12-09 17:03:42,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 17:03:42,334 INFO L225 Difference]: With dead ends: 26 [2020-12-09 17:03:42,334 INFO L226 Difference]: Without dead ends: 26 [2020-12-09 17:03:42,334 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2020-12-09 17:03:42,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-12-09 17:03:42,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2020-12-09 17:03:42,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-12-09 17:03:42,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2020-12-09 17:03:42,337 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 11 [2020-12-09 17:03:42,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 17:03:42,338 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2020-12-09 17:03:42,338 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-09 17:03:42,338 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2020-12-09 17:03:42,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-09 17:03:42,338 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 17:03:42,338 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1] [2020-12-09 17:03:42,539 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-12-09 17:03:42,540 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-09 17:03:42,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 17:03:42,541 INFO L82 PathProgramCache]: Analyzing trace with hash 79779137, now seen corresponding path program 2 times [2020-12-09 17:03:42,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 17:03:42,542 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155604663] [2020-12-09 17:03:42,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 17:03:42,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:03:42,645 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 17:03:42,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155604663] [2020-12-09 17:03:42,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020105530] [2020-12-09 17:03:42,646 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_91e39425-605d-4ea2-a097-7bcd2c0e02fd/bin/utaipan/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 [2020-12-09 17:03:42,668 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-09 17:03:42,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 17:03:42,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-09 17:03:42,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 17:03:42,729 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-09 17:03:42,729 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 17:03:42,808 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-09 17:03:42,808 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2020-12-09 17:03:42,809 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6, 3] total 12 [2020-12-09 17:03:42,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953277125] [2020-12-09 17:03:42,809 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 17:03:42,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 17:03:42,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 17:03:42,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2020-12-09 17:03:42,810 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand 5 states. [2020-12-09 17:03:42,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 17:03:42,827 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2020-12-09 17:03:42,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 17:03:42,828 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-12-09 17:03:42,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 17:03:42,828 INFO L225 Difference]: With dead ends: 24 [2020-12-09 17:03:42,828 INFO L226 Difference]: Without dead ends: 24 [2020-12-09 17:03:42,829 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2020-12-09 17:03:42,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-12-09 17:03:42,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-12-09 17:03:42,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-12-09 17:03:42,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2020-12-09 17:03:42,830 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 11 [2020-12-09 17:03:42,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 17:03:42,831 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2020-12-09 17:03:42,831 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 17:03:42,831 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2020-12-09 17:03:42,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-09 17:03:42,831 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 17:03:42,831 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 17:03:43,032 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 17:03:43,033 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-09 17:03:43,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 17:03:43,034 INFO L82 PathProgramCache]: Analyzing trace with hash -1638817542, now seen corresponding path program 2 times [2020-12-09 17:03:43,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 17:03:43,034 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447708834] [2020-12-09 17:03:43,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 17:03:43,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:03:43,192 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 17:03:43,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447708834] [2020-12-09 17:03:43,193 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923422935] [2020-12-09 17:03:43,193 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_91e39425-605d-4ea2-a097-7bcd2c0e02fd/bin/utaipan/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 [2020-12-09 17:03:43,212 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2020-12-09 17:03:43,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 17:03:43,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-09 17:03:43,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 17:03:43,276 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-12-09 17:03:43,277 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 17:03:43,309 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-12-09 17:03:43,309 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2020-12-09 17:03:43,310 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [8] total 12 [2020-12-09 17:03:43,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746782733] [2020-12-09 17:03:43,310 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-09 17:03:43,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 17:03:43,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-09 17:03:43,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-12-09 17:03:43,311 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 6 states. [2020-12-09 17:03:43,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 17:03:43,330 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2020-12-09 17:03:43,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 17:03:43,331 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2020-12-09 17:03:43,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 17:03:43,331 INFO L225 Difference]: With dead ends: 23 [2020-12-09 17:03:43,331 INFO L226 Difference]: Without dead ends: 20 [2020-12-09 17:03:43,332 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-12-09 17:03:43,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-12-09 17:03:43,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-12-09 17:03:43,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-12-09 17:03:43,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-12-09 17:03:43,334 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 19 [2020-12-09 17:03:43,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 17:03:43,334 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-12-09 17:03:43,334 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-09 17:03:43,334 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-12-09 17:03:43,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-09 17:03:43,335 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 17:03:43,335 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 17:03:43,535 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 17:03:43,537 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-09 17:03:43,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 17:03:43,538 INFO L82 PathProgramCache]: Analyzing trace with hash -1638983057, now seen corresponding path program 1 times [2020-12-09 17:03:43,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 17:03:43,539 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272350356] [2020-12-09 17:03:43,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 17:03:43,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:03:43,705 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 17:03:43,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272350356] [2020-12-09 17:03:43,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146126998] [2020-12-09 17:03:43,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_91e39425-605d-4ea2-a097-7bcd2c0e02fd/bin/utaipan/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 [2020-12-09 17:03:43,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:03:43,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-09 17:03:43,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 17:03:43,752 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 17:03:43,752 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 17:03:43,797 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 17:03:43,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1636112368] [2020-12-09 17:03:43,798 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2020-12-09 17:03:43,798 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 17:03:43,799 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 17:03:43,799 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 17:03:43,799 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 17:03:43,982 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 17:03:44,397 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 52 [2020-12-09 17:03:44,647 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 17:03:44,647 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 17:03:44,647 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 12 [2020-12-09 17:03:44,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767290728] [2020-12-09 17:03:44,647 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-09 17:03:44,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 17:03:44,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-09 17:03:44,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=313, Unknown=0, NotChecked=0, Total=420 [2020-12-09 17:03:44,648 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 13 states. [2020-12-09 17:03:44,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 17:03:44,674 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-12-09 17:03:44,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-09 17:03:44,674 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 19 [2020-12-09 17:03:44,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 17:03:44,675 INFO L225 Difference]: With dead ends: 28 [2020-12-09 17:03:44,675 INFO L226 Difference]: Without dead ends: 28 [2020-12-09 17:03:44,675 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=107, Invalid=313, Unknown=0, NotChecked=0, Total=420 [2020-12-09 17:03:44,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-12-09 17:03:44,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-12-09 17:03:44,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-09 17:03:44,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2020-12-09 17:03:44,677 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 19 [2020-12-09 17:03:44,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 17:03:44,677 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2020-12-09 17:03:44,677 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-09 17:03:44,677 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2020-12-09 17:03:44,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-09 17:03:44,677 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 17:03:44,677 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 17:03:44,878 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2020-12-09 17:03:44,879 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-09 17:03:44,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 17:03:44,880 INFO L82 PathProgramCache]: Analyzing trace with hash 1006723739, now seen corresponding path program 2 times [2020-12-09 17:03:44,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 17:03:44,880 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915238451] [2020-12-09 17:03:44,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 17:03:44,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 17:03:44,936 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 17:03:44,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 17:03:44,957 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 17:03:44,972 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2020-12-09 17:03:44,972 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-09 17:03:44,972 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2020-12-09 17:03:44,993 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 05:03:44 BoogieIcfgContainer [2020-12-09 17:03:44,993 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 17:03:44,993 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 17:03:44,993 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 17:03:44,994 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 17:03:44,994 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 05:03:39" (3/4) ... [2020-12-09 17:03:44,995 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-09 17:03:45,023 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_91e39425-605d-4ea2-a097-7bcd2c0e02fd/bin/utaipan/witness.graphml [2020-12-09 17:03:45,023 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 17:03:45,024 INFO L168 Benchmark]: Toolchain (without parser) took 5775.82 ms. Allocated memory was 88.1 MB in the beginning and 159.4 MB in the end (delta: 71.3 MB). Free memory was 53.7 MB in the beginning and 70.2 MB in the end (delta: -16.5 MB). Peak memory consumption was 55.4 MB. Max. memory is 16.1 GB. [2020-12-09 17:03:45,024 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 88.1 MB. Free memory was 62.8 MB in the beginning and 62.7 MB in the end (delta: 115.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 17:03:45,025 INFO L168 Benchmark]: CACSL2BoogieTranslator took 155.26 ms. Allocated memory was 88.1 MB in the beginning and 132.1 MB in the end (delta: 44.0 MB). Free memory was 53.5 MB in the beginning and 110.1 MB in the end (delta: -56.7 MB). Peak memory consumption was 12.1 MB. Max. memory is 16.1 GB. [2020-12-09 17:03:45,025 INFO L168 Benchmark]: Boogie Procedure Inliner took 35.27 ms. Allocated memory is still 132.1 MB. Free memory was 110.1 MB in the beginning and 110.1 MB in the end (delta: -2.7 kB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-12-09 17:03:45,025 INFO L168 Benchmark]: Boogie Preprocessor took 21.01 ms. Allocated memory is still 132.1 MB. Free memory was 110.1 MB in the beginning and 109.4 MB in the end (delta: 665.9 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 17:03:45,025 INFO L168 Benchmark]: RCFGBuilder took 243.58 ms. Allocated memory is still 132.1 MB. Free memory was 109.4 MB in the beginning and 92.6 MB in the end (delta: 16.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. [2020-12-09 17:03:45,026 INFO L168 Benchmark]: TraceAbstraction took 5285.15 ms. Allocated memory was 132.1 MB in the beginning and 159.4 MB in the end (delta: 27.3 MB). Free memory was 92.6 MB in the beginning and 72.3 MB in the end (delta: 20.3 MB). Peak memory consumption was 47.5 MB. Max. memory is 16.1 GB. [2020-12-09 17:03:45,026 INFO L168 Benchmark]: Witness Printer took 30.11 ms. Allocated memory is still 159.4 MB. Free memory was 72.3 MB in the beginning and 70.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 17:03:45,028 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 88.1 MB. Free memory was 62.8 MB in the beginning and 62.7 MB in the end (delta: 115.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 155.26 ms. Allocated memory was 88.1 MB in the beginning and 132.1 MB in the end (delta: 44.0 MB). Free memory was 53.5 MB in the beginning and 110.1 MB in the end (delta: -56.7 MB). Peak memory consumption was 12.1 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 35.27 ms. Allocated memory is still 132.1 MB. Free memory was 110.1 MB in the beginning and 110.1 MB in the end (delta: -2.7 kB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 21.01 ms. Allocated memory is still 132.1 MB. Free memory was 110.1 MB in the beginning and 109.4 MB in the end (delta: 665.9 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 243.58 ms. Allocated memory is still 132.1 MB. Free memory was 109.4 MB in the beginning and 92.6 MB in the end (delta: 16.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. * TraceAbstraction took 5285.15 ms. Allocated memory was 132.1 MB in the beginning and 159.4 MB in the end (delta: 27.3 MB). Free memory was 92.6 MB in the beginning and 72.3 MB in the end (delta: 20.3 MB). Peak memory consumption was 47.5 MB. Max. memory is 16.1 GB. * Witness Printer took 30.11 ms. Allocated memory is still 159.4 MB. Free memory was 72.3 MB in the beginning and 70.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 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; [L13] COND TRUE n < 10 [L14] a[n] = __VERIFIER_nondet_int() [L13] ++n [L13] COND TRUE n < 10 [L14] a[n] = __VERIFIER_nondet_int() [L13] ++n [L13] COND TRUE n < 10 [L14] a[n] = __VERIFIER_nondet_int() [L13] ++n [L13] COND TRUE n < 10 [L14] a[n] = __VERIFIER_nondet_int() [L13] ++n [L13] COND TRUE n < 10 [L14] a[n] = __VERIFIER_nondet_int() [L13] ++n [L13] COND TRUE n < 10 [L14] a[n] = __VERIFIER_nondet_int() [L13] ++n [L13] COND TRUE n < 10 [L14] a[n] = __VERIFIER_nondet_int() [L13] ++n [L13] COND TRUE n < 10 [L14] a[n] = __VERIFIER_nondet_int() [L13] ++n [L13] COND TRUE n < 10 [L14] a[n] = __VERIFIER_nondet_int() [L13] ++n [L13] COND TRUE n < 10 [L14] a[n] = __VERIFIER_nondet_int() [L13] ++n [L13] COND FALSE !(n < 10) [L17] 0 <= i && i < 10 && a[i] >= 0 [L17] EXPR a[i] [L17] 0 <= i && i < 10 && a[i] >= 0 [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 1 procedures, 18 locations, 7 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 5.2s, OverallIterations: 10, TraceHistogramMax: 10, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 91 SDtfs, 103 SDslu, 95 SDs, 0 SdLazy, 177 SolverSat, 21 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 193 GetRequests, 119 SyntacticMatches, 2 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 2.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=28occurred in iteration=9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 9 MinimizatonAttempts, 21 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.9s InterpolantComputationTime, 182 NumberOfCodeBlocks, 164 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 201 ConstructedInterpolants, 1 QuantifiedInterpolants, 17252 SizeOfPredicates, 1 NumberOfNonLiveVariables, 240 ConjunctsInSsa, 32 ConjunctsInUnsatCore, 19 InterpolantComputations, 7 PerfectInterpolantSequences, 124/302 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...