./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety-ext3/derefAfterFree2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version cad46833 Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_2588a637-2b5f-4aeb-938a-64c67c4b6040/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_2588a637-2b5f-4aeb-938a-64c67c4b6040/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_2588a637-2b5f-4aeb-938a-64c67c4b6040/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_2588a637-2b5f-4aeb-938a-64c67c4b6040/bin/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-ext3/derefAfterFree2.c -s /tmp/vcloud-vcloud-master/worker/working_dir_2588a637-2b5f-4aeb-938a-64c67c4b6040/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_2588a637-2b5f-4aeb-938a-64c67c4b6040/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 44834c55142a76240cb3980fc2bb6f5aeaa27c83 ............................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally 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/working_dir_2588a637-2b5f-4aeb-938a-64c67c4b6040/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_2588a637-2b5f-4aeb-938a-64c67c4b6040/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_2588a637-2b5f-4aeb-938a-64c67c4b6040/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_2588a637-2b5f-4aeb-938a-64c67c4b6040/bin/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-ext3/derefAfterFree2.c -s /tmp/vcloud-vcloud-master/worker/working_dir_2588a637-2b5f-4aeb-938a-64c67c4b6040/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_2588a637-2b5f-4aeb-938a-64c67c4b6040/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 44834c55142a76240cb3980fc2bb6f5aeaa27c83 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(valid-deref) --- Real Ultimate output --- This is Ultimate 0.1.24-cad4683 [2019-10-22 11:21:38,403 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-22 11:21:38,405 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-22 11:21:38,418 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-22 11:21:38,418 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-22 11:21:38,419 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-22 11:21:38,420 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-22 11:21:38,422 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-22 11:21:38,424 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-22 11:21:38,425 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-22 11:21:38,426 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-22 11:21:38,427 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-22 11:21:38,427 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-22 11:21:38,428 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-22 11:21:38,428 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-22 11:21:38,429 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-22 11:21:38,431 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-22 11:21:38,432 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-22 11:21:38,433 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-22 11:21:38,435 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-22 11:21:38,436 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-22 11:21:38,437 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-22 11:21:38,438 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-22 11:21:38,445 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-22 11:21:38,447 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-22 11:21:38,448 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-22 11:21:38,448 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-22 11:21:38,448 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-22 11:21:38,449 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-22 11:21:38,449 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-22 11:21:38,450 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-22 11:21:38,453 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-22 11:21:38,454 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-22 11:21:38,455 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-22 11:21:38,455 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-22 11:21:38,456 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-22 11:21:38,456 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-22 11:21:38,456 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-22 11:21:38,456 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-22 11:21:38,457 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-22 11:21:38,458 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-22 11:21:38,461 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_2588a637-2b5f-4aeb-938a-64c67c4b6040/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2019-10-22 11:21:38,473 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-22 11:21:38,473 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-22 11:21:38,474 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-10-22 11:21:38,474 INFO L138 SettingsManager]: * User list type=DISABLED [2019-10-22 11:21:38,475 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-10-22 11:21:38,475 INFO L138 SettingsManager]: * Explicit value domain=true [2019-10-22 11:21:38,475 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-10-22 11:21:38,475 INFO L138 SettingsManager]: * Octagon Domain=false [2019-10-22 11:21:38,475 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-10-22 11:21:38,475 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-10-22 11:21:38,476 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-10-22 11:21:38,476 INFO L138 SettingsManager]: * Interval Domain=false [2019-10-22 11:21:38,476 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-22 11:21:38,477 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-22 11:21:38,477 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-22 11:21:38,477 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-22 11:21:38,477 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-10-22 11:21:38,477 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-22 11:21:38,477 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-22 11:21:38,477 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-22 11:21:38,478 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2019-10-22 11:21:38,478 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2019-10-22 11:21:38,488 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2019-10-22 11:21:38,488 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-22 11:21:38,489 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-22 11:21:38,489 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-22 11:21:38,489 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-22 11:21:38,489 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-22 11:21:38,489 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-22 11:21:38,489 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-22 11:21:38,490 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-22 11:21:38,490 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-22 11:21:38,490 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-10-22 11:21:38,490 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-22 11:21:38,490 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-22 11:21:38,490 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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/working_dir_2588a637-2b5f-4aeb-938a-64c67c4b6040/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 -> 44834c55142a76240cb3980fc2bb6f5aeaa27c83 [2019-10-22 11:21:38,523 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-22 11:21:38,533 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-22 11:21:38,536 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-22 11:21:38,537 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-22 11:21:38,538 INFO L275 PluginConnector]: CDTParser initialized [2019-10-22 11:21:38,538 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_2588a637-2b5f-4aeb-938a-64c67c4b6040/bin/utaipan/../../sv-benchmarks/c/memsafety-ext3/derefAfterFree2.c [2019-10-22 11:21:38,587 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_2588a637-2b5f-4aeb-938a-64c67c4b6040/bin/utaipan/data/33046bdf7/92dd940be1de4ca7ad6402c0ca477da7/FLAG58586f440 [2019-10-22 11:21:38,984 INFO L306 CDTParser]: Found 1 translation units. [2019-10-22 11:21:38,985 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_2588a637-2b5f-4aeb-938a-64c67c4b6040/sv-benchmarks/c/memsafety-ext3/derefAfterFree2.c [2019-10-22 11:21:38,990 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_2588a637-2b5f-4aeb-938a-64c67c4b6040/bin/utaipan/data/33046bdf7/92dd940be1de4ca7ad6402c0ca477da7/FLAG58586f440 [2019-10-22 11:21:39,001 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_2588a637-2b5f-4aeb-938a-64c67c4b6040/bin/utaipan/data/33046bdf7/92dd940be1de4ca7ad6402c0ca477da7 [2019-10-22 11:21:39,004 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-22 11:21:39,005 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-10-22 11:21:39,006 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-22 11:21:39,006 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-22 11:21:39,009 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-22 11:21:39,010 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 11:21:39" (1/1) ... [2019-10-22 11:21:39,012 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7594edc1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:21:39, skipping insertion in model container [2019-10-22 11:21:39,012 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 11:21:39" (1/1) ... [2019-10-22 11:21:39,019 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-22 11:21:39,033 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-22 11:21:39,208 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 11:21:39,220 INFO L188 MainTranslator]: Completed pre-run [2019-10-22 11:21:39,317 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 11:21:39,334 INFO L192 MainTranslator]: Completed translation [2019-10-22 11:21:39,334 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:21:39 WrapperNode [2019-10-22 11:21:39,335 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-22 11:21:39,336 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-10-22 11:21:39,336 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-10-22 11:21:39,336 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-10-22 11:21:39,344 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:21:39" (1/1) ... [2019-10-22 11:21:39,351 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:21:39" (1/1) ... [2019-10-22 11:21:39,370 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-10-22 11:21:39,371 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-22 11:21:39,371 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-22 11:21:39,371 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-22 11:21:39,380 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:21:39" (1/1) ... [2019-10-22 11:21:39,380 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:21:39" (1/1) ... [2019-10-22 11:21:39,381 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:21:39" (1/1) ... [2019-10-22 11:21:39,382 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:21:39" (1/1) ... [2019-10-22 11:21:39,386 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:21:39" (1/1) ... [2019-10-22 11:21:39,390 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:21:39" (1/1) ... [2019-10-22 11:21:39,391 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:21:39" (1/1) ... [2019-10-22 11:21:39,392 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-22 11:21:39,393 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-22 11:21:39,393 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-22 11:21:39,393 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-22 11:21:39,394 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:21:39" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_2588a637-2b5f-4aeb-938a-64c67c4b6040/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 [2019-10-22 11:21:39,460 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-22 11:21:39,460 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-22 11:21:39,460 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-22 11:21:39,462 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-22 11:21:39,462 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-22 11:21:39,737 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-22 11:21:39,737 INFO L284 CfgBuilder]: Removed 5 assume(true) statements. [2019-10-22 11:21:39,738 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 11:21:39 BoogieIcfgContainer [2019-10-22 11:21:39,739 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-22 11:21:39,739 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-22 11:21:39,740 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-22 11:21:39,742 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-22 11:21:39,742 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.10 11:21:39" (1/3) ... [2019-10-22 11:21:39,743 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6afff77d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 11:21:39, skipping insertion in model container [2019-10-22 11:21:39,743 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:21:39" (2/3) ... [2019-10-22 11:21:39,743 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6afff77d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 11:21:39, skipping insertion in model container [2019-10-22 11:21:39,744 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 11:21:39" (3/3) ... [2019-10-22 11:21:39,745 INFO L109 eAbstractionObserver]: Analyzing ICFG derefAfterFree2.c [2019-10-22 11:21:39,755 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-22 11:21:39,761 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 6 error locations. [2019-10-22 11:21:39,772 INFO L249 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2019-10-22 11:21:39,791 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-22 11:21:39,791 INFO L374 AbstractCegarLoop]: Hoare is false [2019-10-22 11:21:39,792 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-22 11:21:39,792 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-22 11:21:39,792 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-22 11:21:39,792 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-22 11:21:39,792 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-22 11:21:39,792 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-22 11:21:39,805 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2019-10-22 11:21:39,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-10-22 11:21:39,815 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:21:39,816 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-10-22 11:21:39,818 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE]=== [2019-10-22 11:21:39,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:21:39,827 INFO L82 PathProgramCache]: Analyzing trace with hash 925765, now seen corresponding path program 1 times [2019-10-22 11:21:39,838 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-22 11:21:39,839 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335142284] [2019-10-22 11:21:39,839 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:21:39,839 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:21:39,839 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 11:21:39,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:21:39,968 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:21:39,969 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335142284] [2019-10-22 11:21:39,970 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 11:21:39,970 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-10-22 11:21:39,970 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888232740] [2019-10-22 11:21:39,973 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-22 11:21:39,975 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-22 11:21:39,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-22 11:21:39,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-22 11:21:39,987 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 3 states. [2019-10-22 11:21:40,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:21:40,030 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2019-10-22 11:21:40,031 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-22 11:21:40,032 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2019-10-22 11:21:40,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:21:40,040 INFO L225 Difference]: With dead ends: 27 [2019-10-22 11:21:40,040 INFO L226 Difference]: Without dead ends: 23 [2019-10-22 11:21:40,042 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-22 11:21:40,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-10-22 11:21:40,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 19. [2019-10-22 11:21:40,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-10-22 11:21:40,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2019-10-22 11:21:40,071 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 4 [2019-10-22 11:21:40,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:21:40,072 INFO L462 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2019-10-22 11:21:40,072 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-22 11:21:40,072 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2019-10-22 11:21:40,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-10-22 11:21:40,072 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:21:40,073 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-10-22 11:21:40,073 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE]=== [2019-10-22 11:21:40,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:21:40,073 INFO L82 PathProgramCache]: Analyzing trace with hash 925766, now seen corresponding path program 1 times [2019-10-22 11:21:40,073 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-22 11:21:40,074 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685983871] [2019-10-22 11:21:40,074 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:21:40,074 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:21:40,074 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 11:21:40,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:21:40,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:21:40,127 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685983871] [2019-10-22 11:21:40,127 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 11:21:40,127 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-10-22 11:21:40,127 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157214616] [2019-10-22 11:21:40,129 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-22 11:21:40,129 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-22 11:21:40,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-22 11:21:40,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-22 11:21:40,130 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand 3 states. [2019-10-22 11:21:40,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:21:40,166 INFO L93 Difference]: Finished difference Result 23 states and 26 transitions. [2019-10-22 11:21:40,167 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-22 11:21:40,167 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2019-10-22 11:21:40,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:21:40,168 INFO L225 Difference]: With dead ends: 23 [2019-10-22 11:21:40,168 INFO L226 Difference]: Without dead ends: 23 [2019-10-22 11:21:40,169 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-22 11:21:40,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-10-22 11:21:40,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2019-10-22 11:21:40,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-10-22 11:21:40,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2019-10-22 11:21:40,172 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 4 [2019-10-22 11:21:40,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:21:40,172 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2019-10-22 11:21:40,172 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-22 11:21:40,173 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2019-10-22 11:21:40,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-10-22 11:21:40,173 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:21:40,173 INFO L380 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2019-10-22 11:21:40,173 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE]=== [2019-10-22 11:21:40,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:21:40,174 INFO L82 PathProgramCache]: Analyzing trace with hash 264743433, now seen corresponding path program 1 times [2019-10-22 11:21:40,174 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-22 11:21:40,174 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082309822] [2019-10-22 11:21:40,175 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:21:40,175 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:21:40,175 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 11:21:40,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:21:40,306 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:21:40,307 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082309822] [2019-10-22 11:21:40,307 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 11:21:40,307 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-22 11:21:40,307 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655012281] [2019-10-22 11:21:40,307 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-22 11:21:40,308 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-22 11:21:40,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-22 11:21:40,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-10-22 11:21:40,308 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand 6 states. [2019-10-22 11:21:40,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:21:40,359 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2019-10-22 11:21:40,359 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-22 11:21:40,360 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 8 [2019-10-22 11:21:40,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:21:40,360 INFO L225 Difference]: With dead ends: 21 [2019-10-22 11:21:40,360 INFO L226 Difference]: Without dead ends: 21 [2019-10-22 11:21:40,361 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-10-22 11:21:40,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-10-22 11:21:40,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2019-10-22 11:21:40,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-10-22 11:21:40,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2019-10-22 11:21:40,363 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 8 [2019-10-22 11:21:40,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:21:40,363 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2019-10-22 11:21:40,363 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-22 11:21:40,364 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2019-10-22 11:21:40,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-10-22 11:21:40,364 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:21:40,364 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 11:21:40,364 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE]=== [2019-10-22 11:21:40,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:21:40,365 INFO L82 PathProgramCache]: Analyzing trace with hash -382889532, now seen corresponding path program 1 times [2019-10-22 11:21:40,365 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-22 11:21:40,365 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809376092] [2019-10-22 11:21:40,365 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:21:40,365 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:21:40,365 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 11:21:40,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:21:40,393 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:21:40,393 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809376092] [2019-10-22 11:21:40,393 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363388147] [2019-10-22 11:21:40,394 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_2588a637-2b5f-4aeb-938a-64c67c4b6040/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 [2019-10-22 11:21:40,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:21:40,425 INFO L256 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-22 11:21:40,429 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:21:40,451 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:21:40,451 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:21:40,511 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:21:40,511 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [1345509511] [2019-10-22 11:21:40,516 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 10 [2019-10-22 11:21:40,551 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-10-22 11:21:40,551 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-22 11:21:40,834 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 11:21:40,835 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: inappropriate decl info IMPLEMENTATION at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.boogie.Boogie2SmtSymbolTable.getBoogieVar(Boogie2SmtSymbolTable.java:222) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.nonrelational.NonrelationalStatementProcessor.getBoogieVar(NonrelationalStatementProcessor.java:348) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.nonrelational.NonrelationalStatementProcessor.handleHavocStatement(NonrelationalStatementProcessor.java:325) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.nonrelational.NonrelationalStatementProcessor.processStatement(NonrelationalStatementProcessor.java:159) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.nonrelational.NonrelationalStatementProcessor.process(NonrelationalStatementProcessor.java:138) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.nonrelational.NonrelationalStatementProcessor.process(NonrelationalStatementProcessor.java:107) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.nonrelational.NonrelationalPostOperator.handleInternalTransition(NonrelationalPostOperator.java:422) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.nonrelational.NonrelationalPostOperator.handleInternalTransition(NonrelationalPostOperator.java:413) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.nonrelational.NonrelationalPostOperator.apply(NonrelationalPostOperator.java:140) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.nonrelational.NonrelationalPostOperator.apply(NonrelationalPostOperator.java:1) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.compound.CompoundDomainPostOperator.applyInternally(CompoundDomainPostOperator.java:306) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.compound.CompoundDomainPostOperator.apply(CompoundDomainPostOperator.java:131) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.compound.CompoundDomainPostOperator.apply(CompoundDomainPostOperator.java:1) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.transformula.poorman.PoormanCachedPostOperation.restoreOriginalStateVariables(PoormanCachedPostOperation.java:322) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.transformula.poorman.PoormansAbstractPostOperator.applyPost(PoormansAbstractPostOperator.java:217) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.transformula.poorman.PoormansAbstractPostOperator.apply(PoormansAbstractPostOperator.java:120) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.transformula.poorman.PoormansAbstractPostOperator.apply(PoormansAbstractPostOperator.java:1) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.absint.DisjunctiveAbstractState.lambda$17(DisjunctiveAbstractState.java:323) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.absint.DisjunctiveAbstractState.mapCollection(DisjunctiveAbstractState.java:519) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.absint.DisjunctiveAbstractState.apply(DisjunctiveAbstractState.java:323) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.algorithm.FixpointEngine.calculateAbstractPost(FixpointEngine.java:249) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.algorithm.FixpointEngine.calculateFixpoint(FixpointEngine.java:134) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.algorithm.FixpointEngine.run(FixpointEngine.java:105) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.tool.AbstractInterpreter.runWithoutTimeoutAndResults(AbstractInterpreter.java:149) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarAbsIntRunner.generateFixpoints(CegarAbsIntRunner.java:227) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarAbsIntRunner.(CegarAbsIntRunner.java:158) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleAbstractInterpretation.getOrConstructRunner(IpTcStrategyModuleAbstractInterpretation.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleAbstractInterpretation.construct(IpTcStrategyModuleAbstractInterpretation.java:81) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.tryExecuteInterpolantGenerator(TraceAbstractionRefinementEngine.java:299) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.generateProof(TraceAbstractionRefinementEngine.java:184) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.executeStrategy(TraceAbstractionRefinementEngine.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.RefinementEngineFactory.runRefinementEngine(RefinementEngineFactory.java:124) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:419) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:368) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterate(TraceAbstractionStarter.java:332) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:170) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:122) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:120) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2019-10-22 11:21:40,840 INFO L168 Benchmark]: Toolchain (without parser) took 1834.51 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 140.0 MB). Free memory was 945.9 MB in the beginning and 1.0 GB in the end (delta: -100.2 MB). Peak memory consumption was 39.8 MB. Max. memory is 11.5 GB. [2019-10-22 11:21:40,841 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 1.0 GB. Free memory is still 962.0 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 11:21:40,842 INFO L168 Benchmark]: CACSL2BoogieTranslator took 328.99 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 140.0 MB). Free memory was 945.9 MB in the beginning and 1.1 GB in the end (delta: -191.5 MB). Peak memory consumption was 23.1 MB. Max. memory is 11.5 GB. [2019-10-22 11:21:40,855 INFO L168 Benchmark]: Boogie Procedure Inliner took 34.79 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. [2019-10-22 11:21:40,860 INFO L168 Benchmark]: Boogie Preprocessor took 21.74 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2019-10-22 11:21:40,861 INFO L168 Benchmark]: RCFGBuilder took 346.14 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: 18.3 MB). Peak memory consumption was 18.3 MB. Max. memory is 11.5 GB. [2019-10-22 11:21:40,861 INFO L168 Benchmark]: TraceAbstraction took 1098.84 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 70.3 MB). Peak memory consumption was 70.3 MB. Max. memory is 11.5 GB. [2019-10-22 11:21:40,864 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 1.0 GB. Free memory is still 962.0 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 328.99 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 140.0 MB). Free memory was 945.9 MB in the beginning and 1.1 GB in the end (delta: -191.5 MB). Peak memory consumption was 23.1 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 34.79 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 21.74 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 346.14 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: 18.3 MB). Peak memory consumption was 18.3 MB. Max. memory is 11.5 GB. * TraceAbstraction took 1098.84 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 70.3 MB). Peak memory consumption was 70.3 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: inappropriate decl info IMPLEMENTATION de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: inappropriate decl info IMPLEMENTATION: de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.boogie.Boogie2SmtSymbolTable.getBoogieVar(Boogie2SmtSymbolTable.java:222) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... ### Bit-precise run ### This is Ultimate 0.1.24-cad4683 [2019-10-22 11:21:42,792 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-22 11:21:42,795 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-22 11:21:42,805 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-22 11:21:42,808 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-22 11:21:42,809 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-22 11:21:42,810 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-22 11:21:42,812 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-22 11:21:42,815 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-22 11:21:42,820 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-22 11:21:42,822 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-22 11:21:42,823 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-22 11:21:42,824 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-22 11:21:42,826 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-22 11:21:42,827 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-22 11:21:42,828 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-22 11:21:42,830 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-22 11:21:42,833 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-22 11:21:42,835 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-22 11:21:42,837 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-22 11:21:42,840 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-22 11:21:42,841 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-22 11:21:42,842 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-22 11:21:42,843 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-22 11:21:42,844 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-22 11:21:42,844 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-22 11:21:42,845 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-22 11:21:42,845 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-22 11:21:42,845 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-22 11:21:42,850 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-22 11:21:42,850 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-22 11:21:42,851 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-22 11:21:42,851 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-22 11:21:42,851 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-22 11:21:42,852 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-22 11:21:42,852 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-22 11:21:42,852 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-22 11:21:42,852 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-22 11:21:42,852 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-22 11:21:42,853 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-22 11:21:42,853 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-22 11:21:42,853 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_2588a637-2b5f-4aeb-938a-64c67c4b6040/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2019-10-22 11:21:42,864 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-22 11:21:42,864 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-22 11:21:42,865 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-10-22 11:21:42,865 INFO L138 SettingsManager]: * User list type=DISABLED [2019-10-22 11:21:42,865 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-10-22 11:21:42,865 INFO L138 SettingsManager]: * Explicit value domain=true [2019-10-22 11:21:42,865 INFO L138 SettingsManager]: * Octagon Domain=false [2019-10-22 11:21:42,866 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-10-22 11:21:42,866 INFO L138 SettingsManager]: * Interval Domain=false [2019-10-22 11:21:42,866 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-22 11:21:42,866 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-22 11:21:42,867 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-22 11:21:42,867 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-22 11:21:42,867 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-10-22 11:21:42,867 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-22 11:21:42,867 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-22 11:21:42,867 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-22 11:21:42,867 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2019-10-22 11:21:42,868 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2019-10-22 11:21:42,868 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2019-10-22 11:21:42,868 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-22 11:21:42,868 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2019-10-22 11:21:42,868 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2019-10-22 11:21:42,868 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-22 11:21:42,868 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-22 11:21:42,869 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-22 11:21:42,869 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-22 11:21:42,869 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-22 11:21:42,869 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-22 11:21:42,869 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-22 11:21:42,869 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-22 11:21:42,869 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-22 11:21:42,870 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2019-10-22 11:21:42,870 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2019-10-22 11:21:42,870 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-22 11:21:42,871 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/working_dir_2588a637-2b5f-4aeb-938a-64c67c4b6040/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 -> 44834c55142a76240cb3980fc2bb6f5aeaa27c83 [2019-10-22 11:21:42,897 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-22 11:21:42,907 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-22 11:21:42,909 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-22 11:21:42,911 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-22 11:21:42,911 INFO L275 PluginConnector]: CDTParser initialized [2019-10-22 11:21:42,912 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_2588a637-2b5f-4aeb-938a-64c67c4b6040/bin/utaipan/../../sv-benchmarks/c/memsafety-ext3/derefAfterFree2.c [2019-10-22 11:21:42,960 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_2588a637-2b5f-4aeb-938a-64c67c4b6040/bin/utaipan/data/f3f8296fd/98313887d1ef4f808c31b5a210a0aab8/FLAGa6ffedc37 [2019-10-22 11:21:43,354 INFO L306 CDTParser]: Found 1 translation units. [2019-10-22 11:21:43,354 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_2588a637-2b5f-4aeb-938a-64c67c4b6040/sv-benchmarks/c/memsafety-ext3/derefAfterFree2.c [2019-10-22 11:21:43,359 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_2588a637-2b5f-4aeb-938a-64c67c4b6040/bin/utaipan/data/f3f8296fd/98313887d1ef4f808c31b5a210a0aab8/FLAGa6ffedc37 [2019-10-22 11:21:43,370 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_2588a637-2b5f-4aeb-938a-64c67c4b6040/bin/utaipan/data/f3f8296fd/98313887d1ef4f808c31b5a210a0aab8 [2019-10-22 11:21:43,373 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-22 11:21:43,374 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-10-22 11:21:43,375 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-22 11:21:43,375 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-22 11:21:43,378 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-22 11:21:43,379 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 11:21:43" (1/1) ... [2019-10-22 11:21:43,381 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3066ebf5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:21:43, skipping insertion in model container [2019-10-22 11:21:43,381 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 11:21:43" (1/1) ... [2019-10-22 11:21:43,388 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-22 11:21:43,400 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-22 11:21:43,528 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 11:21:43,539 INFO L188 MainTranslator]: Completed pre-run [2019-10-22 11:21:43,551 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 11:21:43,564 INFO L192 MainTranslator]: Completed translation [2019-10-22 11:21:43,565 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:21:43 WrapperNode [2019-10-22 11:21:43,565 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-22 11:21:43,565 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-10-22 11:21:43,565 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-10-22 11:21:43,566 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-10-22 11:21:43,573 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:21:43" (1/1) ... [2019-10-22 11:21:43,580 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:21:43" (1/1) ... [2019-10-22 11:21:43,681 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-10-22 11:21:43,681 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-22 11:21:43,681 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-22 11:21:43,681 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-22 11:21:43,691 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:21:43" (1/1) ... [2019-10-22 11:21:43,691 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:21:43" (1/1) ... [2019-10-22 11:21:43,693 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:21:43" (1/1) ... [2019-10-22 11:21:43,693 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:21:43" (1/1) ... [2019-10-22 11:21:43,700 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:21:43" (1/1) ... [2019-10-22 11:21:43,705 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:21:43" (1/1) ... [2019-10-22 11:21:43,706 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:21:43" (1/1) ... [2019-10-22 11:21:43,709 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-22 11:21:43,710 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-22 11:21:43,711 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-22 11:21:43,711 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-22 11:21:43,712 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:21:43" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_2588a637-2b5f-4aeb-938a-64c67c4b6040/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 [2019-10-22 11:21:43,767 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-22 11:21:43,767 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-22 11:21:43,767 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-22 11:21:43,767 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-22 11:21:43,767 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2019-10-22 11:21:43,952 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-22 11:21:43,952 INFO L284 CfgBuilder]: Removed 5 assume(true) statements. [2019-10-22 11:21:43,953 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 11:21:43 BoogieIcfgContainer [2019-10-22 11:21:43,953 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-22 11:21:43,954 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-22 11:21:43,954 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-22 11:21:43,956 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-22 11:21:43,957 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.10 11:21:43" (1/3) ... [2019-10-22 11:21:43,957 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@755179d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 11:21:43, skipping insertion in model container [2019-10-22 11:21:43,957 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:21:43" (2/3) ... [2019-10-22 11:21:43,958 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@755179d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 11:21:43, skipping insertion in model container [2019-10-22 11:21:43,965 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 11:21:43" (3/3) ... [2019-10-22 11:21:43,967 INFO L109 eAbstractionObserver]: Analyzing ICFG derefAfterFree2.c [2019-10-22 11:21:43,975 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-22 11:21:43,980 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 6 error locations. [2019-10-22 11:21:43,994 INFO L249 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2019-10-22 11:21:44,019 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-22 11:21:44,022 INFO L374 AbstractCegarLoop]: Hoare is false [2019-10-22 11:21:44,022 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-22 11:21:44,022 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-22 11:21:44,022 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-22 11:21:44,022 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-22 11:21:44,022 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-22 11:21:44,022 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-22 11:21:44,036 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2019-10-22 11:21:44,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-10-22 11:21:44,050 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:21:44,051 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-10-22 11:21:44,053 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK]=== [2019-10-22 11:21:44,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:21:44,057 INFO L82 PathProgramCache]: Analyzing trace with hash 925765, now seen corresponding path program 1 times [2019-10-22 11:21:44,063 INFO L157 tionRefinementEngine]: Executing refinement strategy WALRUS [2019-10-22 11:21:44,064 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [759985029] [2019-10-22 11:21:44,064 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_2588a637-2b5f-4aeb-938a-64c67c4b6040/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 [2019-10-22 11:21:44,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:21:44,119 INFO L256 TraceCheckSpWp]: Trace formula consists of 17 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-22 11:21:44,122 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:21:44,172 INFO L375 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 [2019-10-22 11:21:44,172 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-22 11:21:44,179 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-22 11:21:44,179 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-10-22 11:21:44,179 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2019-10-22 11:21:44,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:21:44,189 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:21:44,193 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:21:44,193 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [759985029] [2019-10-22 11:21:44,194 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-10-22 11:21:44,194 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2019-10-22 11:21:44,194 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673815615] [2019-10-22 11:21:44,198 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-22 11:21:44,198 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-10-22 11:21:44,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-22 11:21:44,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-22 11:21:44,212 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 3 states. [2019-10-22 11:21:44,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:21:44,266 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2019-10-22 11:21:44,267 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-22 11:21:44,268 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2019-10-22 11:21:44,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:21:44,277 INFO L225 Difference]: With dead ends: 27 [2019-10-22 11:21:44,277 INFO L226 Difference]: Without dead ends: 23 [2019-10-22 11:21:44,279 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-22 11:21:44,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-10-22 11:21:44,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 19. [2019-10-22 11:21:44,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-10-22 11:21:44,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2019-10-22 11:21:44,305 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 4 [2019-10-22 11:21:44,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:21:44,305 INFO L462 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2019-10-22 11:21:44,305 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-22 11:21:44,306 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2019-10-22 11:21:44,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-10-22 11:21:44,306 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:21:44,306 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-10-22 11:21:44,506 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 11:21:44,507 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK]=== [2019-10-22 11:21:44,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:21:44,507 INFO L82 PathProgramCache]: Analyzing trace with hash 925766, now seen corresponding path program 1 times [2019-10-22 11:21:44,507 INFO L157 tionRefinementEngine]: Executing refinement strategy WALRUS [2019-10-22 11:21:44,508 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [787968924] [2019-10-22 11:21:44,508 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_2588a637-2b5f-4aeb-938a-64c67c4b6040/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 [2019-10-22 11:21:44,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:21:44,547 INFO L256 TraceCheckSpWp]: Trace formula consists of 17 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-22 11:21:44,547 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:21:44,560 INFO L375 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 [2019-10-22 11:21:44,560 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-22 11:21:44,575 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-22 11:21:44,575 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-10-22 11:21:44,576 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2019-10-22 11:21:44,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:21:44,591 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:21:44,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:21:44,656 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [787968924] [2019-10-22 11:21:44,656 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-10-22 11:21:44,657 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2019-10-22 11:21:44,657 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429199655] [2019-10-22 11:21:44,658 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-22 11:21:44,658 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-10-22 11:21:44,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-22 11:21:44,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-22 11:21:44,659 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand 4 states. [2019-10-22 11:21:44,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:21:44,786 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2019-10-22 11:21:44,787 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-22 11:21:44,787 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2019-10-22 11:21:44,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:21:44,788 INFO L225 Difference]: With dead ends: 28 [2019-10-22 11:21:44,788 INFO L226 Difference]: Without dead ends: 28 [2019-10-22 11:21:44,789 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-22 11:21:44,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-10-22 11:21:44,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 25. [2019-10-22 11:21:44,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-10-22 11:21:44,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2019-10-22 11:21:44,792 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 4 [2019-10-22 11:21:44,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:21:44,792 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2019-10-22 11:21:44,792 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-22 11:21:44,792 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2019-10-22 11:21:44,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-10-22 11:21:44,793 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:21:44,793 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 11:21:44,994 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 11:21:44,994 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK]=== [2019-10-22 11:21:44,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:21:44,995 INFO L82 PathProgramCache]: Analyzing trace with hash -382889532, now seen corresponding path program 1 times [2019-10-22 11:21:44,995 INFO L157 tionRefinementEngine]: Executing refinement strategy WALRUS [2019-10-22 11:21:44,995 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [764764971] [2019-10-22 11:21:44,995 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_2588a637-2b5f-4aeb-938a-64c67c4b6040/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 [2019-10-22 11:21:45,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:21:45,039 INFO L256 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-22 11:21:45,040 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:21:45,056 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:21:45,056 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:21:45,079 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:21:45,080 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [764764971] [2019-10-22 11:21:45,080 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641164319] [2019-10-22 11:21:45,080 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_2588a637-2b5f-4aeb-938a-64c67c4b6040/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 [2019-10-22 11:21:45,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:21:45,110 INFO L256 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-22 11:21:45,111 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:21:45,114 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:21:45,114 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:21:45,117 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:21:45,117 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-22 11:21:45,117 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4] total 6 [2019-10-22 11:21:45,117 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797873937] [2019-10-22 11:21:45,118 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-22 11:21:45,118 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-10-22 11:21:45,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-22 11:21:45,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-10-22 11:21:45,119 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand 6 states. [2019-10-22 11:21:45,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:21:45,219 INFO L93 Difference]: Finished difference Result 33 states and 36 transitions. [2019-10-22 11:21:45,220 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-22 11:21:45,220 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2019-10-22 11:21:45,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:21:45,220 INFO L225 Difference]: With dead ends: 33 [2019-10-22 11:21:45,221 INFO L226 Difference]: Without dead ends: 33 [2019-10-22 11:21:45,221 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2019-10-22 11:21:45,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-10-22 11:21:45,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2019-10-22 11:21:45,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-10-22 11:21:45,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2019-10-22 11:21:45,225 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 9 [2019-10-22 11:21:45,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:21:45,225 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2019-10-22 11:21:45,225 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-22 11:21:45,225 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2019-10-22 11:21:45,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-10-22 11:21:45,226 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:21:45,226 INFO L380 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1] [2019-10-22 11:21:45,627 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 cvc4 --incremental --print-success --lang smt --rewrite-divk,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 11:21:45,627 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK]=== [2019-10-22 11:21:45,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:21:45,628 INFO L82 PathProgramCache]: Analyzing trace with hash 810588748, now seen corresponding path program 1 times [2019-10-22 11:21:45,628 INFO L157 tionRefinementEngine]: Executing refinement strategy WALRUS [2019-10-22 11:21:45,628 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [80634126] [2019-10-22 11:21:45,628 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_2588a637-2b5f-4aeb-938a-64c67c4b6040/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 [2019-10-22 11:21:45,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:21:45,700 INFO L256 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-22 11:21:45,701 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:21:45,711 INFO L375 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 [2019-10-22 11:21:45,711 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-22 11:21:45,719 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-22 11:21:45,720 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-10-22 11:21:45,720 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2019-10-22 11:21:45,776 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:21:45,776 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:21:46,213 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:21:46,213 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [80634126] [2019-10-22 11:21:46,214 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890122641] [2019-10-22 11:21:46,214 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_2588a637-2b5f-4aeb-938a-64c67c4b6040/bin/utaipan/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 11:21:46,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:21:46,266 INFO L256 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-22 11:21:46,267 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:21:46,279 INFO L375 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 [2019-10-22 11:21:46,280 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-22 11:21:46,288 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-22 11:21:46,289 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-10-22 11:21:46,289 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2019-10-22 11:21:46,305 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:21:46,305 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:21:46,523 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:21:46,523 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-22 11:21:46,524 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 4, 4] total 8 [2019-10-22 11:21:46,524 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590516467] [2019-10-22 11:21:46,524 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-22 11:21:46,524 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-10-22 11:21:46,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-22 11:21:46,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2019-10-22 11:21:46,525 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand 9 states. [2019-10-22 11:21:46,810 WARN L191 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 18 [2019-10-22 11:21:47,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:21:47,286 INFO L93 Difference]: Finished difference Result 65 states and 69 transitions. [2019-10-22 11:21:47,287 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-22 11:21:47,287 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2019-10-22 11:21:47,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:21:47,289 INFO L225 Difference]: With dead ends: 65 [2019-10-22 11:21:47,290 INFO L226 Difference]: Without dead ends: 65 [2019-10-22 11:21:47,290 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 33 SyntacticMatches, 4 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2019-10-22 11:21:47,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-10-22 11:21:47,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 53. [2019-10-22 11:21:47,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-10-22 11:21:47,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 65 transitions. [2019-10-22 11:21:47,297 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 65 transitions. Word has length 12 [2019-10-22 11:21:47,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:21:47,297 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 65 transitions. [2019-10-22 11:21:47,297 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-22 11:21:47,297 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 65 transitions. [2019-10-22 11:21:47,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-10-22 11:21:47,298 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:21:47,298 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1] [2019-10-22 11:21:47,699 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 cvc4 --incremental --print-success --lang smt --rewrite-divk,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 11:21:47,699 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK]=== [2019-10-22 11:21:47,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:21:47,700 INFO L82 PathProgramCache]: Analyzing trace with hash -1461083186, now seen corresponding path program 1 times [2019-10-22 11:21:47,700 INFO L157 tionRefinementEngine]: Executing refinement strategy WALRUS [2019-10-22 11:21:47,700 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [995802458] [2019-10-22 11:21:47,701 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_2588a637-2b5f-4aeb-938a-64c67c4b6040/bin/utaipan/cvc4 Starting monitored process 8 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 11:21:47,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:21:47,738 INFO L256 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-22 11:21:47,739 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:21:47,744 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-22 11:21:47,744 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:21:47,748 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-22 11:21:47,748 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [995802458] [2019-10-22 11:21:47,748 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-10-22 11:21:47,749 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2019-10-22 11:21:47,749 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319690909] [2019-10-22 11:21:47,749 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-22 11:21:47,750 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-10-22 11:21:47,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-22 11:21:47,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-22 11:21:47,750 INFO L87 Difference]: Start difference. First operand 53 states and 65 transitions. Second operand 3 states. [2019-10-22 11:21:47,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:21:47,774 INFO L93 Difference]: Finished difference Result 52 states and 62 transitions. [2019-10-22 11:21:47,776 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-22 11:21:47,776 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2019-10-22 11:21:47,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:21:47,777 INFO L225 Difference]: With dead ends: 52 [2019-10-22 11:21:47,777 INFO L226 Difference]: Without dead ends: 52 [2019-10-22 11:21:47,777 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-22 11:21:47,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-10-22 11:21:47,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2019-10-22 11:21:47,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-10-22 11:21:47,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 62 transitions. [2019-10-22 11:21:47,784 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 62 transitions. Word has length 18 [2019-10-22 11:21:47,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:21:47,784 INFO L462 AbstractCegarLoop]: Abstraction has 52 states and 62 transitions. [2019-10-22 11:21:47,784 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-22 11:21:47,784 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 62 transitions. [2019-10-22 11:21:47,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-10-22 11:21:47,785 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:21:47,785 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1] [2019-10-22 11:21:47,985 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 11:21:47,986 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK]=== [2019-10-22 11:21:47,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:21:47,986 INFO L82 PathProgramCache]: Analyzing trace with hash 1951061540, now seen corresponding path program 1 times [2019-10-22 11:21:47,986 INFO L157 tionRefinementEngine]: Executing refinement strategy WALRUS [2019-10-22 11:21:47,987 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [706272637] [2019-10-22 11:21:47,987 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_2588a637-2b5f-4aeb-938a-64c67c4b6040/bin/utaipan/cvc4 Starting monitored process 9 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 11:21:48,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:21:48,019 INFO L256 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-22 11:21:48,020 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:21:48,056 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:21:48,056 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:21:48,102 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:21:48,102 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [706272637] [2019-10-22 11:21:48,102 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [912844827] [2019-10-22 11:21:48,102 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_2588a637-2b5f-4aeb-938a-64c67c4b6040/bin/utaipan/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 11:21:48,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:21:48,138 INFO L256 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-22 11:21:48,139 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:21:48,165 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:21:48,165 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:21:48,169 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:21:48,170 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-22 11:21:48,171 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6] total 10 [2019-10-22 11:21:48,171 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410831894] [2019-10-22 11:21:48,172 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-22 11:21:48,172 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-10-22 11:21:48,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-22 11:21:48,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2019-10-22 11:21:48,172 INFO L87 Difference]: Start difference. First operand 52 states and 62 transitions. Second operand 10 states. [2019-10-22 11:21:48,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:21:48,403 INFO L93 Difference]: Finished difference Result 53 states and 59 transitions. [2019-10-22 11:21:48,403 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-22 11:21:48,403 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 19 [2019-10-22 11:21:48,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:21:48,404 INFO L225 Difference]: With dead ends: 53 [2019-10-22 11:21:48,404 INFO L226 Difference]: Without dead ends: 53 [2019-10-22 11:21:48,404 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2019-10-22 11:21:48,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-10-22 11:21:48,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 50. [2019-10-22 11:21:48,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-10-22 11:21:48,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 59 transitions. [2019-10-22 11:21:48,407 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 59 transitions. Word has length 19 [2019-10-22 11:21:48,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:21:48,407 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 59 transitions. [2019-10-22 11:21:48,407 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-22 11:21:48,407 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 59 transitions. [2019-10-22 11:21:48,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-10-22 11:21:48,408 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:21:48,408 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1] [2019-10-22 11:21:48,808 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 cvc4 --incremental --print-success --lang smt --rewrite-divk,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 11:21:48,809 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK]=== [2019-10-22 11:21:48,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:21:48,809 INFO L82 PathProgramCache]: Analyzing trace with hash -1922951525, now seen corresponding path program 2 times [2019-10-22 11:21:48,809 INFO L157 tionRefinementEngine]: Executing refinement strategy WALRUS [2019-10-22 11:21:48,809 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1698490285] [2019-10-22 11:21:48,810 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_2588a637-2b5f-4aeb-938a-64c67c4b6040/bin/utaipan/cvc4 Starting monitored process 11 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 11:21:48,881 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-22 11:21:48,881 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 11:21:48,882 INFO L256 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-22 11:21:48,883 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:21:48,907 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:21:48,907 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:21:49,002 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:21:49,002 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1698490285] [2019-10-22 11:21:49,003 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821383378] [2019-10-22 11:21:49,003 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_2588a637-2b5f-4aeb-938a-64c67c4b6040/bin/utaipan/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 11:21:49,036 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-22 11:21:49,036 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 11:21:49,038 INFO L256 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 13 conjunts are in the unsatisfiable core [2019-10-22 11:21:49,039 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:21:49,045 INFO L375 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 [2019-10-22 11:21:49,046 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-22 11:21:49,053 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-22 11:21:49,053 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-10-22 11:21:49,054 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2019-10-22 11:21:49,110 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2019-10-22 11:21:49,111 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-22 11:21:49,122 INFO L567 ElimStorePlain]: treesize reduction 15, result has 31.8 percent of original size [2019-10-22 11:21:49,123 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-10-22 11:21:49,123 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:7 [2019-10-22 11:21:49,156 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:21:49,157 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:21:49,487 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:21:49,488 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-22 11:21:49,488 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 9, 9] total 22 [2019-10-22 11:21:49,488 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499161043] [2019-10-22 11:21:49,488 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-10-22 11:21:49,489 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-10-22 11:21:49,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-10-22 11:21:49,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=309, Unknown=0, NotChecked=0, Total=462 [2019-10-22 11:21:49,489 INFO L87 Difference]: Start difference. First operand 50 states and 59 transitions. Second operand 22 states. [2019-10-22 11:21:50,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:21:50,287 INFO L93 Difference]: Finished difference Result 67 states and 73 transitions. [2019-10-22 11:21:50,288 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-22 11:21:50,288 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 21 [2019-10-22 11:21:50,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:21:50,288 INFO L225 Difference]: With dead ends: 67 [2019-10-22 11:21:50,289 INFO L226 Difference]: Without dead ends: 67 [2019-10-22 11:21:50,289 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=272, Invalid=484, Unknown=0, NotChecked=0, Total=756 [2019-10-22 11:21:50,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-10-22 11:21:50,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 64. [2019-10-22 11:21:50,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2019-10-22 11:21:50,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 73 transitions. [2019-10-22 11:21:50,293 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 73 transitions. Word has length 21 [2019-10-22 11:21:50,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:21:50,294 INFO L462 AbstractCegarLoop]: Abstraction has 64 states and 73 transitions. [2019-10-22 11:21:50,294 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-10-22 11:21:50,294 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 73 transitions. [2019-10-22 11:21:50,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-10-22 11:21:50,295 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:21:50,295 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1] [2019-10-22 11:21:50,696 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,11 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 11:21:50,696 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK]=== [2019-10-22 11:21:50,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:21:50,696 INFO L82 PathProgramCache]: Analyzing trace with hash 1156599646, now seen corresponding path program 2 times [2019-10-22 11:21:50,697 INFO L157 tionRefinementEngine]: Executing refinement strategy WALRUS [2019-10-22 11:21:50,697 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1925385909] [2019-10-22 11:21:50,697 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_2588a637-2b5f-4aeb-938a-64c67c4b6040/bin/utaipan/cvc4 Starting monitored process 13 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 11:21:50,750 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2019-10-22 11:21:50,750 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 11:21:50,750 INFO L256 TraceCheckSpWp]: Trace formula consists of 24 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-22 11:21:50,751 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:21:50,758 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2019-10-22 11:21:50,758 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:21:50,760 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2019-10-22 11:21:50,760 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1925385909] [2019-10-22 11:21:50,760 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-10-22 11:21:50,760 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2019-10-22 11:21:50,760 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918333585] [2019-10-22 11:21:50,761 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-22 11:21:50,761 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-10-22 11:21:50,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-22 11:21:50,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-22 11:21:50,761 INFO L87 Difference]: Start difference. First operand 64 states and 73 transitions. Second operand 3 states. [2019-10-22 11:21:50,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:21:50,779 INFO L93 Difference]: Finished difference Result 63 states and 72 transitions. [2019-10-22 11:21:50,785 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-22 11:21:50,786 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2019-10-22 11:21:50,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:21:50,786 INFO L225 Difference]: With dead ends: 63 [2019-10-22 11:21:50,786 INFO L226 Difference]: Without dead ends: 63 [2019-10-22 11:21:50,787 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-22 11:21:50,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2019-10-22 11:21:50,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2019-10-22 11:21:50,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2019-10-22 11:21:50,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 72 transitions. [2019-10-22 11:21:50,794 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 72 transitions. Word has length 27 [2019-10-22 11:21:50,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:21:50,794 INFO L462 AbstractCegarLoop]: Abstraction has 63 states and 72 transitions. [2019-10-22 11:21:50,794 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-22 11:21:50,794 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 72 transitions. [2019-10-22 11:21:50,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-10-22 11:21:50,795 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:21:50,795 INFO L380 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 1, 1, 1] [2019-10-22 11:21:50,995 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 11:21:50,995 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK]=== [2019-10-22 11:21:50,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:21:50,996 INFO L82 PathProgramCache]: Analyzing trace with hash 1495096408, now seen corresponding path program 2 times [2019-10-22 11:21:50,996 INFO L157 tionRefinementEngine]: Executing refinement strategy WALRUS [2019-10-22 11:21:50,996 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [2034118496] [2019-10-22 11:21:50,996 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_2588a637-2b5f-4aeb-938a-64c67c4b6040/bin/utaipan/cvc4 Starting monitored process 14 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 11:21:51,060 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-22 11:21:51,060 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 11:21:51,062 INFO L256 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-22 11:21:51,063 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:21:51,100 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 17 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:21:51,100 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:21:51,128 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 17 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:21:51,128 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2034118496] [2019-10-22 11:21:51,128 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297322973] [2019-10-22 11:21:51,129 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_2588a637-2b5f-4aeb-938a-64c67c4b6040/bin/utaipan/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 11:21:51,178 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-22 11:21:51,178 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 11:21:51,181 INFO L256 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 14 conjunts are in the unsatisfiable core [2019-10-22 11:21:51,182 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:21:51,192 INFO L375 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 [2019-10-22 11:21:51,192 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-22 11:21:51,197 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-22 11:21:51,197 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-10-22 11:21:51,198 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2019-10-22 11:21:51,288 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2019-10-22 11:21:51,288 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-22 11:21:51,301 INFO L567 ElimStorePlain]: treesize reduction 15, result has 37.5 percent of original size [2019-10-22 11:21:51,301 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-10-22 11:21:51,301 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:9 [2019-10-22 11:21:51,332 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 17 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:21:51,332 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:21:51,786 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 17 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:21:51,786 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-22 11:21:51,786 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 10, 10] total 22 [2019-10-22 11:21:51,786 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814794101] [2019-10-22 11:21:51,787 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-10-22 11:21:51,787 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-10-22 11:21:51,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-10-22 11:21:51,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2019-10-22 11:21:51,787 INFO L87 Difference]: Start difference. First operand 63 states and 72 transitions. Second operand 22 states. [2019-10-22 11:21:52,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:21:52,130 INFO L93 Difference]: Finished difference Result 52 states and 56 transitions. [2019-10-22 11:21:52,131 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-22 11:21:52,131 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 28 [2019-10-22 11:21:52,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:21:52,131 INFO L225 Difference]: With dead ends: 52 [2019-10-22 11:21:52,131 INFO L226 Difference]: Without dead ends: 52 [2019-10-22 11:21:52,131 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 83 SyntacticMatches, 5 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2019-10-22 11:21:52,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-10-22 11:21:52,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2019-10-22 11:21:52,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-10-22 11:21:52,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2019-10-22 11:21:52,136 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 28 [2019-10-22 11:21:52,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:21:52,137 INFO L462 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2019-10-22 11:21:52,137 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-10-22 11:21:52,137 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2019-10-22 11:21:52,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-10-22 11:21:52,137 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:21:52,138 INFO L380 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 11:21:52,538 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 cvc4 --incremental --print-success --lang smt --rewrite-divk,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 11:21:52,539 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK]=== [2019-10-22 11:21:52,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:21:52,539 INFO L82 PathProgramCache]: Analyzing trace with hash -1418335515, now seen corresponding path program 1 times [2019-10-22 11:21:52,539 INFO L157 tionRefinementEngine]: Executing refinement strategy WALRUS [2019-10-22 11:21:52,539 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1387326171] [2019-10-22 11:21:52,539 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_2588a637-2b5f-4aeb-938a-64c67c4b6040/bin/utaipan/cvc4 Starting monitored process 16 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 11:21:52,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 11:21:52,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 11:21:52,822 INFO L168 tionRefinementEngine]: Strategy WALRUS found a feasible trace [2019-10-22 11:21:52,822 INFO L445 BasicCegarLoop]: Counterexample might be feasible [2019-10-22 11:21:53,023 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 11:21:53,047 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.10 11:21:53 BoogieIcfgContainer [2019-10-22 11:21:53,047 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-10-22 11:21:53,048 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-10-22 11:21:53,048 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-10-22 11:21:53,048 INFO L275 PluginConnector]: Witness Printer initialized [2019-10-22 11:21:53,048 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 11:21:43" (3/4) ... [2019-10-22 11:21:53,051 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-10-22 11:21:53,091 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_2588a637-2b5f-4aeb-938a-64c67c4b6040/bin/utaipan/witness.graphml [2019-10-22 11:21:53,091 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-10-22 11:21:53,093 INFO L168 Benchmark]: Toolchain (without parser) took 9718.89 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 231.2 MB). Free memory was 952.3 MB in the beginning and 989.8 MB in the end (delta: -37.5 MB). Peak memory consumption was 193.7 MB. Max. memory is 11.5 GB. [2019-10-22 11:21:53,093 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 1.0 GB. Free memory is still 977.8 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 11:21:53,093 INFO L168 Benchmark]: CACSL2BoogieTranslator took 190.11 ms. Allocated memory is still 1.0 GB. Free memory was 952.3 MB in the beginning and 941.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2019-10-22 11:21:53,094 INFO L168 Benchmark]: Boogie Procedure Inliner took 115.66 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 183.0 MB). Free memory was 941.6 MB in the beginning and 1.2 GB in the end (delta: -237.0 MB). Peak memory consumption was 12.9 MB. Max. memory is 11.5 GB. [2019-10-22 11:21:53,094 INFO L168 Benchmark]: Boogie Preprocessor took 28.90 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 11:21:53,095 INFO L168 Benchmark]: RCFGBuilder took 242.86 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 26.5 MB). Peak memory consumption was 26.5 MB. Max. memory is 11.5 GB. [2019-10-22 11:21:53,095 INFO L168 Benchmark]: TraceAbstraction took 9093.28 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 48.2 MB). Free memory was 1.2 GB in the beginning and 996.4 MB in the end (delta: 155.7 MB). Peak memory consumption was 204.0 MB. Max. memory is 11.5 GB. [2019-10-22 11:21:53,095 INFO L168 Benchmark]: Witness Printer took 44.04 ms. Allocated memory is still 1.3 GB. Free memory was 996.4 MB in the beginning and 989.8 MB in the end (delta: 6.6 MB). Peak memory consumption was 6.6 MB. Max. memory is 11.5 GB. [2019-10-22 11:21:53,097 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 1.0 GB. Free memory is still 977.8 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 190.11 ms. Allocated memory is still 1.0 GB. Free memory was 952.3 MB in the beginning and 941.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 115.66 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 183.0 MB). Free memory was 941.6 MB in the beginning and 1.2 GB in the end (delta: -237.0 MB). Peak memory consumption was 12.9 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 28.90 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 242.86 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 26.5 MB). Peak memory consumption was 26.5 MB. Max. memory is 11.5 GB. * TraceAbstraction took 9093.28 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 48.2 MB). Free memory was 1.2 GB in the beginning and 996.4 MB in the end (delta: 155.7 MB). Peak memory consumption was 204.0 MB. Max. memory is 11.5 GB. * Witness Printer took 44.04 ms. Allocated memory is still 1.3 GB. Free memory was 996.4 MB in the beginning and 989.8 MB in the end (delta: 6.6 MB). Peak memory consumption was 6.6 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 9]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L6] int* p = malloc(10 * sizeof(int)); [L8] int i = 0; [L8] COND TRUE i < 10 [L9] p[i] = 1 [L10] COND FALSE !(i == 5) [L8] i++ [L8] COND TRUE i < 10 [L9] p[i] = 1 [L10] COND FALSE !(i == 5) [L8] i++ [L8] COND TRUE i < 10 [L9] p[i] = 1 [L10] COND FALSE !(i == 5) [L8] i++ [L8] COND TRUE i < 10 [L9] p[i] = 1 [L10] COND FALSE !(i == 5) [L8] i++ [L8] COND TRUE i < 10 [L9] p[i] = 1 [L10] COND FALSE !(i == 5) [L8] i++ [L8] COND TRUE i < 10 [L9] p[i] = 1 [L10] COND TRUE i == 5 [L11] free(p) [L11] free(p) [L11] free(p) [L8] i++ [L8] COND TRUE i < 10 [L9] p[i] = 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 19 locations, 6 error locations. Result: UNSAFE, OverallTime: 9.0s, OverallIterations: 10, TraceHistogramMax: 7, AutomataDifference: 2.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 85 SDtfs, 320 SDslu, 189 SDs, 0 SdLazy, 800 SolverSat, 76 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 449 GetRequests, 358 SyntacticMatches, 12 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 2.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=64occurred in iteration=7, 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, 27 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 2.3s InterpolantComputationTime, 262 NumberOfCodeBlocks, 242 NumberOfCodeBlocksAsserted, 19 NumberOfCheckSat, 434 ConstructedInterpolants, 0 QuantifiedInterpolants, 69060 SizeOfPredicates, 34 NumberOfNonLiveVariables, 549 ConjunctsInSsa, 88 ConjunctsInUnsatCore, 28 InterpolantComputations, 8 PerfectInterpolantSequences, 220/672 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...