./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/termination-crafted/SyntaxSupportPointer01-1.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 6b5699aa Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_b3d1842a-df84-46b8-903c-ce141b5154d5/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_b3d1842a-df84-46b8-903c-ce141b5154d5/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_b3d1842a-df84-46b8-903c-ce141b5154d5/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_b3d1842a-df84-46b8-903c-ce141b5154d5/bin/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/termination-crafted/SyntaxSupportPointer01-1.c -s /tmp/vcloud-vcloud-master/worker/run_dir_b3d1842a-df84-46b8-903c-ce141b5154d5/bin/utaipan/config/svcomp-DerefFreeMemtrack-64bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_b3d1842a-df84-46b8-903c-ce141b5154d5/bin/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash f2a8d3919c0496882213752e07135061fdbafdf6 ........................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- Skipped default analysis because property is memsafety ### Bit-precise run ### This is Ultimate 0.1.24-6b5699a [2019-11-26 03:01:59,363 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-26 03:01:59,365 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-26 03:01:59,379 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-26 03:01:59,379 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-26 03:01:59,381 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-26 03:01:59,383 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-26 03:01:59,391 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-26 03:01:59,395 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-26 03:01:59,399 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-26 03:01:59,400 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-26 03:01:59,401 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-26 03:01:59,401 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-26 03:01:59,403 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-26 03:01:59,405 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-26 03:01:59,406 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-26 03:01:59,407 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-26 03:01:59,408 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-26 03:01:59,410 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-26 03:01:59,413 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-26 03:01:59,417 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-26 03:01:59,420 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-26 03:01:59,421 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-26 03:01:59,422 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-26 03:01:59,424 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-26 03:01:59,424 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-26 03:01:59,424 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-26 03:01:59,426 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-26 03:01:59,426 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-26 03:01:59,427 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-26 03:01:59,427 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-26 03:01:59,428 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-26 03:01:59,429 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-26 03:01:59,429 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-26 03:01:59,430 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-26 03:01:59,430 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-26 03:01:59,431 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-26 03:01:59,431 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-26 03:01:59,431 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-26 03:01:59,432 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-26 03:01:59,433 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-26 03:01:59,434 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_b3d1842a-df84-46b8-903c-ce141b5154d5/bin/utaipan/config/svcomp-DerefFreeMemtrack-64bit-Taipan_Bitvector.epf [2019-11-26 03:01:59,458 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-26 03:01:59,458 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-26 03:01:59,459 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-26 03:01:59,459 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-26 03:01:59,459 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-26 03:01:59,459 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-26 03:01:59,460 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-26 03:01:59,460 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-26 03:01:59,460 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-26 03:01:59,461 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-26 03:01:59,461 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-26 03:01:59,461 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-26 03:01:59,461 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-11-26 03:01:59,461 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-26 03:01:59,462 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-26 03:01:59,462 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2019-11-26 03:01:59,462 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2019-11-26 03:01:59,462 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2019-11-26 03:01:59,462 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-26 03:01:59,463 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-26 03:01:59,463 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2019-11-26 03:01:59,463 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2019-11-26 03:01:59,463 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-26 03:01:59,463 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-26 03:01:59,464 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-26 03:01:59,464 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-26 03:01:59,464 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-26 03:01:59,464 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-26 03:01:59,464 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-26 03:01:59,465 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-26 03:01:59,465 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2019-11-26 03:01:59,465 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2019-11-26 03:01:59,465 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-26 03:01:59,465 INFO L138 SettingsManager]: * Logic for external solver=AUFBV Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_b3d1842a-df84-46b8-903c-ce141b5154d5/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f2a8d3919c0496882213752e07135061fdbafdf6 [2019-11-26 03:01:59,602 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-26 03:01:59,614 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-26 03:01:59,617 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-26 03:01:59,619 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-26 03:01:59,620 INFO L275 PluginConnector]: CDTParser initialized [2019-11-26 03:01:59,620 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_b3d1842a-df84-46b8-903c-ce141b5154d5/bin/utaipan/../../sv-benchmarks/c/termination-crafted/SyntaxSupportPointer01-1.c [2019-11-26 03:01:59,674 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_b3d1842a-df84-46b8-903c-ce141b5154d5/bin/utaipan/data/26c80e399/c9784f94bfb04701ada2113e21642f7b/FLAG4c2129646 [2019-11-26 03:02:00,062 INFO L306 CDTParser]: Found 1 translation units. [2019-11-26 03:02:00,063 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_b3d1842a-df84-46b8-903c-ce141b5154d5/sv-benchmarks/c/termination-crafted/SyntaxSupportPointer01-1.c [2019-11-26 03:02:00,068 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_b3d1842a-df84-46b8-903c-ce141b5154d5/bin/utaipan/data/26c80e399/c9784f94bfb04701ada2113e21642f7b/FLAG4c2129646 [2019-11-26 03:02:00,082 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_b3d1842a-df84-46b8-903c-ce141b5154d5/bin/utaipan/data/26c80e399/c9784f94bfb04701ada2113e21642f7b [2019-11-26 03:02:00,087 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-26 03:02:00,088 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-26 03:02:00,092 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-26 03:02:00,092 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-26 03:02:00,095 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-26 03:02:00,096 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 03:02:00" (1/1) ... [2019-11-26 03:02:00,098 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@68f249ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 03:02:00, skipping insertion in model container [2019-11-26 03:02:00,099 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 03:02:00" (1/1) ... [2019-11-26 03:02:00,106 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-26 03:02:00,124 INFO L179 MainTranslator]: Built tables and reachable declarations [2019-11-26 03:02:00,409 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-26 03:02:00,424 INFO L201 MainTranslator]: Completed pre-run [2019-11-26 03:02:00,438 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-26 03:02:00,454 INFO L205 MainTranslator]: Completed translation [2019-11-26 03:02:00,454 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 03:02:00 WrapperNode [2019-11-26 03:02:00,454 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-26 03:02:00,455 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-26 03:02:00,455 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-26 03:02:00,455 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-26 03:02:00,462 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 03:02:00" (1/1) ... [2019-11-26 03:02:00,471 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 03:02:00" (1/1) ... [2019-11-26 03:02:00,491 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-26 03:02:00,491 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-26 03:02:00,492 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-26 03:02:00,492 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-26 03:02:00,501 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 03:02:00" (1/1) ... [2019-11-26 03:02:00,501 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 03:02:00" (1/1) ... [2019-11-26 03:02:00,504 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 03:02:00" (1/1) ... [2019-11-26 03:02:00,504 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 03:02:00" (1/1) ... [2019-11-26 03:02:00,510 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 03:02:00" (1/1) ... [2019-11-26 03:02:00,514 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 03:02:00" (1/1) ... [2019-11-26 03:02:00,515 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 03:02:00" (1/1) ... [2019-11-26 03:02:00,517 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-26 03:02:00,518 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-26 03:02:00,518 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-26 03:02:00,518 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-26 03:02:00,519 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 03:02:00" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b3d1842a-df84-46b8-903c-ce141b5154d5/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-26 03:02:00,575 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-26 03:02:00,576 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2019-11-26 03:02:00,576 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-26 03:02:00,576 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-26 03:02:00,576 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-26 03:02:00,576 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2019-11-26 03:02:00,894 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-26 03:02:00,894 INFO L284 CfgBuilder]: Removed 5 assume(true) statements. [2019-11-26 03:02:00,895 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 03:02:00 BoogieIcfgContainer [2019-11-26 03:02:00,895 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-26 03:02:00,896 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-26 03:02:00,896 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-26 03:02:00,899 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-26 03:02:00,899 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 03:02:00" (1/3) ... [2019-11-26 03:02:00,900 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a3a9569 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 03:02:00, skipping insertion in model container [2019-11-26 03:02:00,900 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 03:02:00" (2/3) ... [2019-11-26 03:02:00,900 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a3a9569 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 03:02:00, skipping insertion in model container [2019-11-26 03:02:00,900 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 03:02:00" (3/3) ... [2019-11-26 03:02:00,901 INFO L109 eAbstractionObserver]: Analyzing ICFG SyntaxSupportPointer01-1.c [2019-11-26 03:02:00,911 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-26 03:02:00,917 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 12 error locations. [2019-11-26 03:02:00,924 INFO L249 AbstractCegarLoop]: Starting to check reachability of 12 error locations. [2019-11-26 03:02:00,938 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-26 03:02:00,938 INFO L374 AbstractCegarLoop]: Hoare is false [2019-11-26 03:02:00,938 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-26 03:02:00,938 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-26 03:02:00,938 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-26 03:02:00,938 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-26 03:02:00,938 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-26 03:02:00,939 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-26 03:02:00,951 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2019-11-26 03:02:00,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-11-26 03:02:00,957 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 03:02:00,957 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-11-26 03:02:00,958 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2019-11-26 03:02:00,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 03:02:00,962 INFO L82 PathProgramCache]: Analyzing trace with hash 29857, now seen corresponding path program 1 times [2019-11-26 03:02:00,969 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 03:02:00,970 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1485061210] [2019-11-26 03:02:00,970 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b3d1842a-df84-46b8-903c-ce141b5154d5/bin/utaipan/cvc4 Starting monitored process 2 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 03:02:01,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 03:02:01,040 INFO L255 TraceCheckSpWp]: Trace formula consists of 16 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-26 03:02:01,044 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 03:02:01,086 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-11-26 03:02:01,087 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-26 03:02:01,098 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-26 03:02:01,099 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-26 03:02:01,100 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2019-11-26 03:02:01,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 03:02:01,114 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 03:02:01,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 03:02:01,119 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1485061210] [2019-11-26 03:02:01,120 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-26 03:02:01,120 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2019-11-26 03:02:01,121 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955130474] [2019-11-26 03:02:01,125 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-26 03:02:01,125 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 03:02:01,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-26 03:02:01,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-26 03:02:01,138 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 3 states. [2019-11-26 03:02:01,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 03:02:01,208 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2019-11-26 03:02:01,209 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-26 03:02:01,210 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2019-11-26 03:02:01,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 03:02:01,218 INFO L225 Difference]: With dead ends: 23 [2019-11-26 03:02:01,219 INFO L226 Difference]: Without dead ends: 21 [2019-11-26 03:02:01,220 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-26 03:02:01,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-11-26 03:02:01,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2019-11-26 03:02:01,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-11-26 03:02:01,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2019-11-26 03:02:01,248 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 3 [2019-11-26 03:02:01,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 03:02:01,249 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2019-11-26 03:02:01,249 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-26 03:02:01,249 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2019-11-26 03:02:01,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-11-26 03:02:01,249 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 03:02:01,250 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-11-26 03:02:01,450 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 03:02:01,451 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2019-11-26 03:02:01,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 03:02:01,451 INFO L82 PathProgramCache]: Analyzing trace with hash 29858, now seen corresponding path program 1 times [2019-11-26 03:02:01,451 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 03:02:01,452 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1260865015] [2019-11-26 03:02:01,452 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b3d1842a-df84-46b8-903c-ce141b5154d5/bin/utaipan/cvc4 Starting monitored process 3 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 03:02:01,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 03:02:01,508 INFO L255 TraceCheckSpWp]: Trace formula consists of 16 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-26 03:02:01,509 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 03:02:01,520 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-11-26 03:02:01,520 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-26 03:02:01,528 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-26 03:02:01,528 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-26 03:02:01,528 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2019-11-26 03:02:01,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 03:02:01,542 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 03:02:01,576 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 03:02:01,577 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1260865015] [2019-11-26 03:02:01,577 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-26 03:02:01,577 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2019-11-26 03:02:01,577 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255774576] [2019-11-26 03:02:01,579 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-26 03:02:01,579 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 03:02:01,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-26 03:02:01,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-26 03:02:01,580 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 4 states. [2019-11-26 03:02:01,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 03:02:01,616 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2019-11-26 03:02:01,616 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-26 03:02:01,617 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 3 [2019-11-26 03:02:01,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 03:02:01,617 INFO L225 Difference]: With dead ends: 16 [2019-11-26 03:02:01,617 INFO L226 Difference]: Without dead ends: 16 [2019-11-26 03:02:01,618 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-26 03:02:01,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-11-26 03:02:01,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2019-11-26 03:02:01,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-11-26 03:02:01,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2019-11-26 03:02:01,621 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 3 [2019-11-26 03:02:01,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 03:02:01,622 INFO L462 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2019-11-26 03:02:01,622 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-26 03:02:01,622 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2019-11-26 03:02:01,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-26 03:02:01,623 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 03:02:01,623 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 03:02:01,824 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 03:02:01,824 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2019-11-26 03:02:01,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 03:02:01,825 INFO L82 PathProgramCache]: Analyzing trace with hash 59325548, now seen corresponding path program 1 times [2019-11-26 03:02:01,825 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 03:02:01,826 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [2004022391] [2019-11-26 03:02:01,826 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b3d1842a-df84-46b8-903c-ce141b5154d5/bin/utaipan/cvc4 Starting monitored process 4 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 03:02:01,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 03:02:01,906 INFO L255 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-26 03:02:01,907 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 03:02:01,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 03:02:01,930 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 03:02:01,941 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 03:02:01,941 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2004022391] [2019-11-26 03:02:01,942 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-26 03:02:01,942 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 4 [2019-11-26 03:02:01,942 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26619422] [2019-11-26 03:02:01,942 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-26 03:02:01,943 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 03:02:01,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-26 03:02:01,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-26 03:02:01,943 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 5 states. [2019-11-26 03:02:01,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 03:02:01,982 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2019-11-26 03:02:01,984 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-26 03:02:01,984 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2019-11-26 03:02:01,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 03:02:01,985 INFO L225 Difference]: With dead ends: 15 [2019-11-26 03:02:01,985 INFO L226 Difference]: Without dead ends: 15 [2019-11-26 03:02:01,985 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-26 03:02:01,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-11-26 03:02:01,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2019-11-26 03:02:01,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-11-26 03:02:01,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2019-11-26 03:02:01,988 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 8 [2019-11-26 03:02:01,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 03:02:01,988 INFO L462 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2019-11-26 03:02:01,988 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-26 03:02:01,988 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2019-11-26 03:02:01,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-26 03:02:01,989 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 03:02:01,989 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 03:02:02,189 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 03:02:02,191 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2019-11-26 03:02:02,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 03:02:02,191 INFO L82 PathProgramCache]: Analyzing trace with hash 1177278863, now seen corresponding path program 1 times [2019-11-26 03:02:02,192 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 03:02:02,192 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [952110382] [2019-11-26 03:02:02,192 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b3d1842a-df84-46b8-903c-ce141b5154d5/bin/utaipan/cvc4 Starting monitored process 5 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 03:02:02,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 03:02:02,263 INFO L255 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-26 03:02:02,264 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 03:02:02,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 03:02:02,300 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 03:02:04,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 03:02:04,351 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [952110382] [2019-11-26 03:02:04,352 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-26 03:02:04,352 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2019-11-26 03:02:04,352 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509416671] [2019-11-26 03:02:04,353 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-26 03:02:04,353 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 03:02:04,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-26 03:02:04,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=18, Unknown=1, NotChecked=0, Total=30 [2019-11-26 03:02:04,354 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 6 states. [2019-11-26 03:02:04,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 03:02:04,440 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2019-11-26 03:02:04,441 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-26 03:02:04,441 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2019-11-26 03:02:04,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 03:02:04,442 INFO L225 Difference]: With dead ends: 14 [2019-11-26 03:02:04,442 INFO L226 Difference]: Without dead ends: 0 [2019-11-26 03:02:04,442 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=16, Invalid=25, Unknown=1, NotChecked=0, Total=42 [2019-11-26 03:02:04,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-11-26 03:02:04,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-11-26 03:02:04,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-11-26 03:02:04,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-11-26 03:02:04,443 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 10 [2019-11-26 03:02:04,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 03:02:04,443 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-26 03:02:04,443 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-26 03:02:04,443 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-11-26 03:02:04,443 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-11-26 03:02:04,643 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 03:02:04,648 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.11 03:02:04 BoogieIcfgContainer [2019-11-26 03:02:04,649 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-26 03:02:04,649 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-26 03:02:04,649 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-26 03:02:04,650 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-26 03:02:04,650 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 03:02:00" (3/4) ... [2019-11-26 03:02:04,653 INFO L137 WitnessPrinter]: Generating witness for correct program [2019-11-26 03:02:04,663 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2019-11-26 03:02:04,664 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2019-11-26 03:02:04,664 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2019-11-26 03:02:04,707 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_b3d1842a-df84-46b8-903c-ce141b5154d5/bin/utaipan/witness.graphml [2019-11-26 03:02:04,708 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-26 03:02:04,709 INFO L168 Benchmark]: Toolchain (without parser) took 4621.26 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 180.4 MB). Free memory was 950.1 MB in the beginning and 1.1 GB in the end (delta: -106.5 MB). Peak memory consumption was 73.8 MB. Max. memory is 11.5 GB. [2019-11-26 03:02:04,709 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-26 03:02:04,710 INFO L168 Benchmark]: CACSL2BoogieTranslator took 362.96 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 180.4 MB). Free memory was 950.1 MB in the beginning and 1.2 GB in the end (delta: -222.2 MB). Peak memory consumption was 22.8 MB. Max. memory is 11.5 GB. [2019-11-26 03:02:04,710 INFO L168 Benchmark]: Boogie Procedure Inliner took 36.25 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. [2019-11-26 03:02:04,711 INFO L168 Benchmark]: Boogie Preprocessor took 26.08 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. [2019-11-26 03:02:04,711 INFO L168 Benchmark]: RCFGBuilder took 377.50 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 22.7 MB). Peak memory consumption was 22.7 MB. Max. memory is 11.5 GB. [2019-11-26 03:02:04,712 INFO L168 Benchmark]: TraceAbstraction took 3752.85 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: 86.4 MB). Peak memory consumption was 86.4 MB. Max. memory is 11.5 GB. [2019-11-26 03:02:04,712 INFO L168 Benchmark]: Witness Printer took 58.49 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 6.6 MB). Peak memory consumption was 6.6 MB. Max. memory is 11.5 GB. [2019-11-26 03:02:04,715 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 362.96 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 180.4 MB). Free memory was 950.1 MB in the beginning and 1.2 GB in the end (delta: -222.2 MB). Peak memory consumption was 22.8 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 36.25 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. * Boogie Preprocessor took 26.08 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 377.50 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 22.7 MB). Peak memory consumption was 22.7 MB. Max. memory is 11.5 GB. * TraceAbstraction took 3752.85 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: 86.4 MB). Peak memory consumption was 86.4 MB. Max. memory is 11.5 GB. * Witness Printer took 58.49 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 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: - PositiveResult [Line: 17]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 15]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 17]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 19]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 15]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 19]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 17]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 19]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 17]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 16]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 13]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 16]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - AllSpecificationsHoldResult: All specifications hold 12 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 28 locations, 12 error locations. Result: SAFE, OverallTime: 3.7s, OverallIterations: 4, TraceHistogramMax: 1, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 36 SDtfs, 55 SDslu, 15 SDs, 0 SdLazy, 54 SolverSat, 9 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 41 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 2.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=28occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 2.2s InterpolantComputationTime, 24 NumberOfCodeBlocks, 24 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 40 ConstructedInterpolants, 1 QuantifiedInterpolants, 1834 SizeOfPredicates, 9 NumberOfNonLiveVariables, 94 ConjunctsInSsa, 18 ConjunctsInUnsatCore, 8 InterpolantComputations, 8 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...