./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength2_-write.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 6b5699aa Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_44817182-b9b2-4d5c-b35a-68d86e1f6321/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_44817182-b9b2-4d5c-b35a-68d86e1f6321/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_44817182-b9b2-4d5c-b35a-68d86e1f6321/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_44817182-b9b2-4d5c-b35a-68d86e1f6321/bin/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength2_-write.c -s /tmp/vcloud-vcloud-master/worker/run_dir_44817182-b9b2-4d5c-b35a-68d86e1f6321/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_44817182-b9b2-4d5c-b35a-68d86e1f6321/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 32bit --witnessprinter.graph.data.programhash a6853fb9e064ccfef5e54a8bac94eb86beeed80f ..................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(valid-deref) --- Real Ultimate output --- Skipped default analysis because property is memsafety ### Bit-precise run ### This is Ultimate 0.1.24-6b5699a [2019-11-26 02:31:41,421 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-26 02:31:41,423 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-26 02:31:41,438 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-26 02:31:41,438 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-26 02:31:41,440 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-26 02:31:41,442 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-26 02:31:41,451 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-26 02:31:41,455 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-26 02:31:41,459 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-26 02:31:41,460 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-26 02:31:41,462 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-26 02:31:41,462 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-26 02:31:41,464 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-26 02:31:41,465 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-26 02:31:41,466 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-26 02:31:41,467 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-26 02:31:41,468 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-26 02:31:41,470 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-26 02:31:41,474 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-26 02:31:41,477 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-26 02:31:41,480 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-26 02:31:41,481 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-26 02:31:41,482 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-26 02:31:41,486 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-26 02:31:41,486 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-26 02:31:41,487 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-26 02:31:41,488 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-26 02:31:41,488 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-26 02:31:41,489 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-26 02:31:41,489 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-26 02:31:41,490 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-26 02:31:41,491 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-26 02:31:41,491 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-26 02:31:41,492 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-26 02:31:41,492 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-26 02:31:41,493 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-26 02:31:41,493 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-26 02:31:41,493 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-26 02:31:41,494 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-26 02:31:41,495 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-26 02:31:41,496 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_44817182-b9b2-4d5c-b35a-68d86e1f6321/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2019-11-26 02:31:41,520 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-26 02:31:41,520 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-26 02:31:41,521 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-26 02:31:41,521 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-26 02:31:41,521 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-26 02:31:41,521 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-26 02:31:41,521 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-26 02:31:41,522 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-26 02:31:41,522 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-26 02:31:41,522 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-26 02:31:41,522 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-26 02:31:41,523 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-26 02:31:41,523 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-26 02:31:41,523 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-11-26 02:31:41,523 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-26 02:31:41,523 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-26 02:31:41,523 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-26 02:31:41,524 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2019-11-26 02:31:41,524 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2019-11-26 02:31:41,524 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2019-11-26 02:31:41,524 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-26 02:31:41,524 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-26 02:31:41,524 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2019-11-26 02:31:41,525 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2019-11-26 02:31:41,525 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-26 02:31:41,525 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-26 02:31:41,525 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-26 02:31:41,525 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-26 02:31:41,526 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-26 02:31:41,526 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-26 02:31:41,526 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-26 02:31:41,526 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-26 02:31:41,526 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-26 02:31:41,527 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2019-11-26 02:31:41,527 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2019-11-26 02:31:41,527 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-26 02:31:41,527 INFO L138 SettingsManager]: * Logic for external solver=AUFBV Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_44817182-b9b2-4d5c-b35a-68d86e1f6321/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 -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a6853fb9e064ccfef5e54a8bac94eb86beeed80f [2019-11-26 02:31:41,661 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-26 02:31:41,677 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-26 02:31:41,680 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-26 02:31:41,682 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-26 02:31:41,688 INFO L275 PluginConnector]: CDTParser initialized [2019-11-26 02:31:41,689 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_44817182-b9b2-4d5c-b35a-68d86e1f6321/bin/utaipan/../../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength2_-write.c [2019-11-26 02:31:41,737 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_44817182-b9b2-4d5c-b35a-68d86e1f6321/bin/utaipan/data/9051c2e4d/a3edc1c7c1994cf4880f9833587c284d/FLAG0f94d0b50 [2019-11-26 02:31:42,114 INFO L306 CDTParser]: Found 1 translation units. [2019-11-26 02:31:42,117 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_44817182-b9b2-4d5c-b35a-68d86e1f6321/sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength2_-write.c [2019-11-26 02:31:42,122 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_44817182-b9b2-4d5c-b35a-68d86e1f6321/bin/utaipan/data/9051c2e4d/a3edc1c7c1994cf4880f9833587c284d/FLAG0f94d0b50 [2019-11-26 02:31:42,132 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_44817182-b9b2-4d5c-b35a-68d86e1f6321/bin/utaipan/data/9051c2e4d/a3edc1c7c1994cf4880f9833587c284d [2019-11-26 02:31:42,134 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-26 02:31:42,135 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-26 02:31:42,136 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-26 02:31:42,136 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-26 02:31:42,140 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-26 02:31:42,140 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 02:31:42" (1/1) ... [2019-11-26 02:31:42,143 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7fdd7dfe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:31:42, skipping insertion in model container [2019-11-26 02:31:42,143 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 02:31:42" (1/1) ... [2019-11-26 02:31:42,150 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-26 02:31:42,165 INFO L179 MainTranslator]: Built tables and reachable declarations [2019-11-26 02:31:42,374 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-26 02:31:42,384 INFO L201 MainTranslator]: Completed pre-run [2019-11-26 02:31:42,400 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-26 02:31:42,414 INFO L205 MainTranslator]: Completed translation [2019-11-26 02:31:42,414 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:31:42 WrapperNode [2019-11-26 02:31:42,415 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-26 02:31:42,415 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-26 02:31:42,415 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-26 02:31:42,415 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-26 02:31:42,423 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:31:42" (1/1) ... [2019-11-26 02:31:42,431 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:31:42" (1/1) ... [2019-11-26 02:31:42,462 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-26 02:31:42,463 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-26 02:31:42,463 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-26 02:31:42,463 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-26 02:31:42,471 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:31:42" (1/1) ... [2019-11-26 02:31:42,471 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:31:42" (1/1) ... [2019-11-26 02:31:42,485 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:31:42" (1/1) ... [2019-11-26 02:31:42,486 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:31:42" (1/1) ... [2019-11-26 02:31:42,501 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:31:42" (1/1) ... [2019-11-26 02:31:42,506 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:31:42" (1/1) ... [2019-11-26 02:31:42,514 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:31:42" (1/1) ... [2019-11-26 02:31:42,523 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-26 02:31:42,523 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-26 02:31:42,523 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-26 02:31:42,524 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-26 02:31:42,524 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:31:42" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_44817182-b9b2-4d5c-b35a-68d86e1f6321/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 [2019-11-26 02:31:42,592 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2019-11-26 02:31:42,592 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-26 02:31:42,594 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-26 02:31:42,594 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-26 02:31:42,594 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-26 02:31:42,594 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2019-11-26 02:31:43,107 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-26 02:31:43,107 INFO L284 CfgBuilder]: Removed 12 assume(true) statements. [2019-11-26 02:31:43,108 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 02:31:43 BoogieIcfgContainer [2019-11-26 02:31:43,109 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-26 02:31:43,110 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-26 02:31:43,110 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-26 02:31:43,112 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-26 02:31:43,113 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 02:31:42" (1/3) ... [2019-11-26 02:31:43,113 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ad5829b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 02:31:43, skipping insertion in model container [2019-11-26 02:31:43,114 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:31:42" (2/3) ... [2019-11-26 02:31:43,114 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ad5829b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 02:31:43, skipping insertion in model container [2019-11-26 02:31:43,114 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 02:31:43" (3/3) ... [2019-11-26 02:31:43,115 INFO L109 eAbstractionObserver]: Analyzing ICFG ArraysOfVariableLength2_-write.c [2019-11-26 02:31:43,122 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-26 02:31:43,127 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 11 error locations. [2019-11-26 02:31:43,134 INFO L249 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2019-11-26 02:31:43,150 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-26 02:31:43,150 INFO L374 AbstractCegarLoop]: Hoare is false [2019-11-26 02:31:43,150 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-26 02:31:43,150 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-26 02:31:43,150 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-26 02:31:43,151 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-26 02:31:43,151 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-26 02:31:43,151 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-26 02:31:43,164 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states. [2019-11-26 02:31:43,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-11-26 02:31:43,171 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:31:43,172 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-11-26 02:31:43,172 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2019-11-26 02:31:43,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:31:43,177 INFO L82 PathProgramCache]: Analyzing trace with hash 28698921, now seen corresponding path program 1 times [2019-11-26 02:31:43,185 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:31:43,186 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1462465083] [2019-11-26 02:31:43,186 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_44817182-b9b2-4d5c-b35a-68d86e1f6321/bin/utaipan/cvc4 Starting monitored process 2 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:31:43,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:31:43,282 INFO L255 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-26 02:31:43,286 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:31:43,325 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-11-26 02:31:43,325 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-26 02:31:43,335 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-26 02:31:43,335 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-26 02:31:43,336 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2019-11-26 02:31:43,385 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-26 02:31:43,386 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 30 [2019-11-26 02:31:43,387 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-26 02:31:43,410 INFO L567 ElimStorePlain]: treesize reduction 14, result has 44.0 percent of original size [2019-11-26 02:31:43,411 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-26 02:31:43,411 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:14, output treesize:11 [2019-11-26 02:31:43,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:31:43,433 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:31:43,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:31:43,448 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1462465083] [2019-11-26 02:31:43,449 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-26 02:31:43,449 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2019-11-26 02:31:43,449 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232537149] [2019-11-26 02:31:43,454 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-26 02:31:43,455 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 02:31:43,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-26 02:31:43,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-26 02:31:43,470 INFO L87 Difference]: Start difference. First operand 40 states. Second operand 4 states. [2019-11-26 02:31:43,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:31:43,629 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2019-11-26 02:31:43,630 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-26 02:31:43,631 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 5 [2019-11-26 02:31:43,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:31:43,638 INFO L225 Difference]: With dead ends: 38 [2019-11-26 02:31:43,639 INFO L226 Difference]: Without dead ends: 36 [2019-11-26 02:31:43,640 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-26 02:31:43,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-11-26 02:31:43,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2019-11-26 02:31:43,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-11-26 02:31:43,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2019-11-26 02:31:43,669 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 5 [2019-11-26 02:31:43,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:31:43,670 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2019-11-26 02:31:43,670 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-26 02:31:43,670 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2019-11-26 02:31:43,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-11-26 02:31:43,670 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:31:43,671 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-11-26 02:31:43,876 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:31:43,876 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2019-11-26 02:31:43,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:31:43,877 INFO L82 PathProgramCache]: Analyzing trace with hash 28698922, now seen corresponding path program 1 times [2019-11-26 02:31:43,877 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:31:43,878 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [2131380559] [2019-11-26 02:31:43,878 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_44817182-b9b2-4d5c-b35a-68d86e1f6321/bin/utaipan/cvc4 Starting monitored process 3 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:31:43,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:31:43,950 INFO L255 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-26 02:31:43,951 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:31:43,959 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-11-26 02:31:43,959 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-26 02:31:43,974 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-26 02:31:43,978 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-11-26 02:31:43,979 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-26 02:31:43,987 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-26 02:31:43,988 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-26 02:31:43,988 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:16, output treesize:14 [2019-11-26 02:31:44,016 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-26 02:31:44,018 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2019-11-26 02:31:44,019 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-26 02:31:44,040 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-26 02:31:44,054 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-26 02:31:44,055 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2019-11-26 02:31:44,056 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-26 02:31:44,077 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-26 02:31:44,078 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-11-26 02:31:44,078 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:32, output treesize:23 [2019-11-26 02:31:46,119 WARN L192 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 21 [2019-11-26 02:31:46,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:31:46,124 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:31:46,208 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-26 02:31:46,356 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:31:46,356 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2131380559] [2019-11-26 02:31:46,356 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-26 02:31:46,356 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2019-11-26 02:31:46,357 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449339947] [2019-11-26 02:31:46,358 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-26 02:31:46,358 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 02:31:46,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-26 02:31:46,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-26 02:31:46,359 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand 6 states. [2019-11-26 02:31:46,870 WARN L192 SmtUtils]: Spent 467.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2019-11-26 02:31:47,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:31:47,697 INFO L93 Difference]: Finished difference Result 123 states and 144 transitions. [2019-11-26 02:31:47,699 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-26 02:31:47,699 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 5 [2019-11-26 02:31:47,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:31:47,702 INFO L225 Difference]: With dead ends: 123 [2019-11-26 02:31:47,703 INFO L226 Difference]: Without dead ends: 123 [2019-11-26 02:31:47,703 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-11-26 02:31:47,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2019-11-26 02:31:47,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 44. [2019-11-26 02:31:47,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-11-26 02:31:47,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 54 transitions. [2019-11-26 02:31:47,712 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 54 transitions. Word has length 5 [2019-11-26 02:31:47,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:31:47,713 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 54 transitions. [2019-11-26 02:31:47,713 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-26 02:31:47,713 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 54 transitions. [2019-11-26 02:31:47,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-11-26 02:31:47,714 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:31:47,714 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-11-26 02:31:47,917 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:31:47,918 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2019-11-26 02:31:47,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:31:47,919 INFO L82 PathProgramCache]: Analyzing trace with hash 889656834, now seen corresponding path program 1 times [2019-11-26 02:31:47,919 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:31:47,919 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [850112549] [2019-11-26 02:31:47,919 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_44817182-b9b2-4d5c-b35a-68d86e1f6321/bin/utaipan/cvc4 Starting monitored process 4 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:31:47,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:31:47,976 INFO L255 TraceCheckSpWp]: Trace formula consists of 18 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-26 02:31:47,976 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:31:47,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:31:47,982 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:31:47,992 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:31:47,993 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [850112549] [2019-11-26 02:31:47,993 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-26 02:31:47,993 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2019-11-26 02:31:47,993 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137893461] [2019-11-26 02:31:47,993 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-26 02:31:47,993 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 02:31:47,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-26 02:31:47,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-26 02:31:47,994 INFO L87 Difference]: Start difference. First operand 44 states and 54 transitions. Second operand 4 states. [2019-11-26 02:31:48,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:31:48,047 INFO L93 Difference]: Finished difference Result 68 states and 79 transitions. [2019-11-26 02:31:48,048 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-26 02:31:48,048 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2019-11-26 02:31:48,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:31:48,050 INFO L225 Difference]: With dead ends: 68 [2019-11-26 02:31:48,050 INFO L226 Difference]: Without dead ends: 68 [2019-11-26 02:31:48,050 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-26 02:31:48,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2019-11-26 02:31:48,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 61. [2019-11-26 02:31:48,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-11-26 02:31:48,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 79 transitions. [2019-11-26 02:31:48,058 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 79 transitions. Word has length 6 [2019-11-26 02:31:48,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:31:48,058 INFO L462 AbstractCegarLoop]: Abstraction has 61 states and 79 transitions. [2019-11-26 02:31:48,058 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-26 02:31:48,058 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 79 transitions. [2019-11-26 02:31:48,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-11-26 02:31:48,059 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:31:48,059 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-11-26 02:31:48,260 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:31:48,261 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2019-11-26 02:31:48,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:31:48,261 INFO L82 PathProgramCache]: Analyzing trace with hash 889666543, now seen corresponding path program 1 times [2019-11-26 02:31:48,261 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:31:48,262 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [899031623] [2019-11-26 02:31:48,262 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_44817182-b9b2-4d5c-b35a-68d86e1f6321/bin/utaipan/cvc4 Starting monitored process 5 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:31:48,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:31:48,314 INFO L255 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-26 02:31:48,315 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:31:48,320 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-11-26 02:31:48,320 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-26 02:31:48,326 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-26 02:31:48,326 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-26 02:31:48,326 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2019-11-26 02:31:48,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:31:48,338 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:31:48,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:31:48,354 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [899031623] [2019-11-26 02:31:48,354 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-26 02:31:48,354 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 3] imperfect sequences [] total 3 [2019-11-26 02:31:48,354 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520171007] [2019-11-26 02:31:48,355 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-26 02:31:48,355 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 02:31:48,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-26 02:31:48,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-26 02:31:48,355 INFO L87 Difference]: Start difference. First operand 61 states and 79 transitions. Second operand 4 states. [2019-11-26 02:31:48,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:31:48,425 INFO L93 Difference]: Finished difference Result 60 states and 76 transitions. [2019-11-26 02:31:48,425 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-26 02:31:48,425 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2019-11-26 02:31:48,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:31:48,426 INFO L225 Difference]: With dead ends: 60 [2019-11-26 02:31:48,426 INFO L226 Difference]: Without dead ends: 60 [2019-11-26 02:31:48,427 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-26 02:31:48,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-11-26 02:31:48,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2019-11-26 02:31:48,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2019-11-26 02:31:48,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 76 transitions. [2019-11-26 02:31:48,432 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 76 transitions. Word has length 6 [2019-11-26 02:31:48,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:31:48,432 INFO L462 AbstractCegarLoop]: Abstraction has 60 states and 76 transitions. [2019-11-26 02:31:48,433 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-26 02:31:48,433 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 76 transitions. [2019-11-26 02:31:48,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-11-26 02:31:48,433 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:31:48,433 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-11-26 02:31:48,634 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:31:48,634 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2019-11-26 02:31:48,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:31:48,634 INFO L82 PathProgramCache]: Analyzing trace with hash 889666544, now seen corresponding path program 1 times [2019-11-26 02:31:48,636 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:31:48,636 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1016184345] [2019-11-26 02:31:48,636 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_44817182-b9b2-4d5c-b35a-68d86e1f6321/bin/utaipan/cvc4 Starting monitored process 6 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:31:48,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-26 02:31:48,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-26 02:31:48,776 INFO L174 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2019-11-26 02:31:48,776 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-26 02:31:48,977 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:31:48,993 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.11 02:31:48 BoogieIcfgContainer [2019-11-26 02:31:48,993 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-26 02:31:48,994 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-26 02:31:48,994 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-26 02:31:48,994 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-26 02:31:48,995 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 02:31:43" (3/4) ... [2019-11-26 02:31:48,997 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-11-26 02:31:49,028 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_44817182-b9b2-4d5c-b35a-68d86e1f6321/bin/utaipan/witness.graphml [2019-11-26 02:31:49,029 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-26 02:31:49,030 INFO L168 Benchmark]: Toolchain (without parser) took 6894.53 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 137.9 MB). Free memory was 944.7 MB in the beginning and 943.0 MB in the end (delta: 1.7 MB). Peak memory consumption was 139.6 MB. Max. memory is 11.5 GB. [2019-11-26 02:31:49,030 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 1.0 GB. Free memory is still 962.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-26 02:31:49,031 INFO L168 Benchmark]: CACSL2BoogieTranslator took 278.56 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 137.9 MB). Free memory was 944.7 MB in the beginning and 1.1 GB in the end (delta: -188.1 MB). Peak memory consumption was 22.9 MB. Max. memory is 11.5 GB. [2019-11-26 02:31:49,031 INFO L168 Benchmark]: Boogie Procedure Inliner took 47.14 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-26 02:31:49,032 INFO L168 Benchmark]: Boogie Preprocessor took 60.43 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: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2019-11-26 02:31:49,032 INFO L168 Benchmark]: RCFGBuilder took 585.51 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: 23.7 MB). Peak memory consumption was 23.7 MB. Max. memory is 11.5 GB. [2019-11-26 02:31:49,033 INFO L168 Benchmark]: TraceAbstraction took 5883.74 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 948.4 MB in the end (delta: 155.3 MB). Peak memory consumption was 155.3 MB. Max. memory is 11.5 GB. [2019-11-26 02:31:49,034 INFO L168 Benchmark]: Witness Printer took 34.99 ms. Allocated memory is still 1.2 GB. Free memory was 948.4 MB in the beginning and 943.0 MB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2019-11-26 02:31:49,036 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 1.0 GB. Free memory is still 962.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 278.56 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 137.9 MB). Free memory was 944.7 MB in the beginning and 1.1 GB in the end (delta: -188.1 MB). Peak memory consumption was 22.9 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 47.14 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 60.43 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: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. * RCFGBuilder took 585.51 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: 23.7 MB). Peak memory consumption was 23.7 MB. Max. memory is 11.5 GB. * TraceAbstraction took 5883.74 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 948.4 MB in the end (delta: 155.3 MB). Peak memory consumption was 155.3 MB. Max. memory is 11.5 GB. * Witness Printer took 34.99 ms. Allocated memory is still 1.2 GB. Free memory was 948.4 MB in the beginning and 943.0 MB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 23]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L32] int i, b[100]; [L33] i = 0 [L33] COND TRUE i < 100 [L21] int a[n], i; [L22] i = 0 [L22] COND TRUE i < size [L23] EXPR b[i] [L23] a[i] = b[i] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 40 locations, 11 error locations. Result: UNSAFE, OverallTime: 5.8s, OverallIterations: 5, TraceHistogramMax: 1, AutomataDifference: 1.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 120 SDtfs, 300 SDslu, 127 SDs, 0 SdLazy, 171 SolverSat, 19 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 39 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 2.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=61occurred in iteration=3, 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, 4 MinimizatonAttempts, 86 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 2.6s InterpolantComputationTime, 28 NumberOfCodeBlocks, 28 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 36 ConstructedInterpolants, 5 QuantifiedInterpolants, 1156 SizeOfPredicates, 14 NumberOfNonLiveVariables, 119 ConjunctsInSsa, 21 ConjunctsInUnsatCore, 8 InterpolantComputations, 8 PerfectInterpolantSequences, 0/0 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...