./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/openbsd_cmemrchr-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version f470102c Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_3d063d6d-7483-49e0-b64b-d970c86151e0/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_3d063d6d-7483-49e0-b64b-d970c86151e0/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_3d063d6d-7483-49e0-b64b-d970c86151e0/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_3d063d6d-7483-49e0-b64b-d970c86151e0/bin/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/openbsd_cmemrchr-alloca-2.i -s /tmp/vcloud-vcloud-master/worker/run_dir_3d063d6d-7483-49e0-b64b-d970c86151e0/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_3d063d6d-7483-49e0-b64b-d970c86151e0/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 b2f3c0ded3a6ea37e981661d4b4066d384875e4d ..................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.25-f470102 [2019-12-07 12:22:06,357 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-07 12:22:06,358 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-07 12:22:06,366 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-07 12:22:06,366 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-07 12:22:06,366 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-07 12:22:06,367 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-07 12:22:06,369 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-07 12:22:06,370 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-07 12:22:06,370 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-07 12:22:06,371 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-07 12:22:06,372 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-07 12:22:06,372 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-07 12:22:06,373 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-07 12:22:06,373 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-07 12:22:06,374 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-07 12:22:06,375 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-07 12:22:06,375 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-07 12:22:06,377 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-07 12:22:06,378 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-07 12:22:06,379 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-07 12:22:06,380 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-07 12:22:06,381 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-07 12:22:06,381 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-07 12:22:06,383 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-12-07 12:22:06,383 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-12-07 12:22:06,383 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-12-07 12:22:06,383 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-12-07 12:22:06,384 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-12-07 12:22:06,384 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-12-07 12:22:06,385 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-07 12:22:06,385 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-07 12:22:06,385 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-07 12:22:06,386 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-07 12:22:06,386 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-07 12:22:06,387 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-07 12:22:06,387 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-07 12:22:06,387 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-07 12:22:06,387 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-07 12:22:06,388 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-07 12:22:06,388 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-07 12:22:06,389 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_3d063d6d-7483-49e0-b64b-d970c86151e0/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2019-12-07 12:22:06,399 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-07 12:22:06,399 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-07 12:22:06,399 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-12-07 12:22:06,399 INFO L138 SettingsManager]: * User list type=DISABLED [2019-12-07 12:22:06,400 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-12-07 12:22:06,400 INFO L138 SettingsManager]: * Explicit value domain=true [2019-12-07 12:22:06,400 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-12-07 12:22:06,400 INFO L138 SettingsManager]: * Octagon Domain=false [2019-12-07 12:22:06,400 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-12-07 12:22:06,400 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-12-07 12:22:06,400 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-12-07 12:22:06,400 INFO L138 SettingsManager]: * Interval Domain=false [2019-12-07 12:22:06,401 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-12-07 12:22:06,401 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-12-07 12:22:06,401 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-12-07 12:22:06,401 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-12-07 12:22:06,401 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-12-07 12:22:06,402 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-07 12:22:06,402 INFO L138 SettingsManager]: * sizeof long=4 [2019-12-07 12:22:06,402 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-12-07 12:22:06,402 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-12-07 12:22:06,402 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-12-07 12:22:06,402 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-07 12:22:06,402 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2019-12-07 12:22:06,402 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2019-12-07 12:22:06,402 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2019-12-07 12:22:06,403 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-12-07 12:22:06,403 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-12-07 12:22:06,403 INFO L138 SettingsManager]: * sizeof long double=12 [2019-12-07 12:22:06,403 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-07 12:22:06,403 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-07 12:22:06,403 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-12-07 12:22:06,404 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-12-07 12:22:06,404 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-07 12:22:06,404 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-07 12:22:06,404 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-12-07 12:22:06,404 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-12-07 12:22:06,404 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-12-07 12:22:06,404 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-12-07 12:22:06,404 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-12-07 12:22:06,404 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/run_dir_3d063d6d-7483-49e0-b64b-d970c86151e0/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 -> b2f3c0ded3a6ea37e981661d4b4066d384875e4d [2019-12-07 12:22:06,521 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-07 12:22:06,529 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-07 12:22:06,532 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-07 12:22:06,533 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-07 12:22:06,533 INFO L275 PluginConnector]: CDTParser initialized [2019-12-07 12:22:06,534 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_3d063d6d-7483-49e0-b64b-d970c86151e0/bin/utaipan/../../sv-benchmarks/c/array-memsafety/openbsd_cmemrchr-alloca-2.i [2019-12-07 12:22:06,574 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_3d063d6d-7483-49e0-b64b-d970c86151e0/bin/utaipan/data/e1d2ed1c6/970e48be7812449fae7e080c5d70e31d/FLAG49dde6140 [2019-12-07 12:22:07,049 INFO L306 CDTParser]: Found 1 translation units. [2019-12-07 12:22:07,049 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_3d063d6d-7483-49e0-b64b-d970c86151e0/sv-benchmarks/c/array-memsafety/openbsd_cmemrchr-alloca-2.i [2019-12-07 12:22:07,059 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_3d063d6d-7483-49e0-b64b-d970c86151e0/bin/utaipan/data/e1d2ed1c6/970e48be7812449fae7e080c5d70e31d/FLAG49dde6140 [2019-12-07 12:22:07,068 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_3d063d6d-7483-49e0-b64b-d970c86151e0/bin/utaipan/data/e1d2ed1c6/970e48be7812449fae7e080c5d70e31d [2019-12-07 12:22:07,070 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-07 12:22:07,071 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-12-07 12:22:07,072 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-07 12:22:07,072 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-07 12:22:07,074 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-07 12:22:07,075 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 12:22:07" (1/1) ... [2019-12-07 12:22:07,077 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62699726 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:22:07, skipping insertion in model container [2019-12-07 12:22:07,077 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 12:22:07" (1/1) ... [2019-12-07 12:22:07,082 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-07 12:22:07,106 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-07 12:22:07,304 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 12:22:07,310 INFO L203 MainTranslator]: Completed pre-run [2019-12-07 12:22:07,337 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 12:22:07,367 INFO L208 MainTranslator]: Completed translation [2019-12-07 12:22:07,367 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:22:07 WrapperNode [2019-12-07 12:22:07,367 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-07 12:22:07,368 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-07 12:22:07,368 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-07 12:22:07,368 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-07 12:22:07,373 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:22:07" (1/1) ... [2019-12-07 12:22:07,383 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:22:07" (1/1) ... [2019-12-07 12:22:07,397 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-07 12:22:07,397 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-07 12:22:07,397 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-07 12:22:07,397 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-07 12:22:07,403 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:22:07" (1/1) ... [2019-12-07 12:22:07,403 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:22:07" (1/1) ... [2019-12-07 12:22:07,405 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:22:07" (1/1) ... [2019-12-07 12:22:07,405 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:22:07" (1/1) ... [2019-12-07 12:22:07,409 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:22:07" (1/1) ... [2019-12-07 12:22:07,412 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:22:07" (1/1) ... [2019-12-07 12:22:07,413 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:22:07" (1/1) ... [2019-12-07 12:22:07,415 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-07 12:22:07,415 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-07 12:22:07,415 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-07 12:22:07,415 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-07 12:22:07,416 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:22:07" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3d063d6d-7483-49e0-b64b-d970c86151e0/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 [2019-12-07 12:22:07,456 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-12-07 12:22:07,456 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-12-07 12:22:07,457 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-12-07 12:22:07,457 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-12-07 12:22:07,457 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-07 12:22:07,457 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-07 12:22:07,687 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-07 12:22:07,687 INFO L287 CfgBuilder]: Removed 8 assume(true) statements. [2019-12-07 12:22:07,688 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 12:22:07 BoogieIcfgContainer [2019-12-07 12:22:07,688 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-07 12:22:07,689 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-12-07 12:22:07,689 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-12-07 12:22:07,691 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-12-07 12:22:07,691 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 12:22:07" (1/3) ... [2019-12-07 12:22:07,692 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28cadda2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 12:22:07, skipping insertion in model container [2019-12-07 12:22:07,692 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:22:07" (2/3) ... [2019-12-07 12:22:07,692 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28cadda2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 12:22:07, skipping insertion in model container [2019-12-07 12:22:07,692 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 12:22:07" (3/3) ... [2019-12-07 12:22:07,694 INFO L109 eAbstractionObserver]: Analyzing ICFG openbsd_cmemrchr-alloca-2.i [2019-12-07 12:22:07,700 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-12-07 12:22:07,705 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 5 error locations. [2019-12-07 12:22:07,712 INFO L249 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2019-12-07 12:22:07,723 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-12-07 12:22:07,724 INFO L374 AbstractCegarLoop]: Hoare is false [2019-12-07 12:22:07,724 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-12-07 12:22:07,724 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-12-07 12:22:07,724 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-07 12:22:07,724 INFO L378 AbstractCegarLoop]: Difference is false [2019-12-07 12:22:07,724 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-07 12:22:07,724 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-12-07 12:22:07,733 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2019-12-07 12:22:07,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-12-07 12:22:07,737 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 12:22:07,738 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-12-07 12:22:07,738 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2019-12-07 12:22:07,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 12:22:07,741 INFO L82 PathProgramCache]: Analyzing trace with hash 107409, now seen corresponding path program 1 times [2019-12-07 12:22:07,747 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 12:22:07,747 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923214420] [2019-12-07 12:22:07,747 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 12:22:07,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:22:07,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 12:22:07,855 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923214420] [2019-12-07 12:22:07,856 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 12:22:07,856 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2019-12-07 12:22:07,857 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139383596] [2019-12-07 12:22:07,859 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-12-07 12:22:07,860 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 12:22:07,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-12-07 12:22:07,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-07 12:22:07,870 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 3 states. [2019-12-07 12:22:07,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 12:22:07,893 INFO L93 Difference]: Finished difference Result 16 states and 19 transitions. [2019-12-07 12:22:07,894 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-12-07 12:22:07,895 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2019-12-07 12:22:07,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 12:22:07,903 INFO L225 Difference]: With dead ends: 16 [2019-12-07 12:22:07,903 INFO L226 Difference]: Without dead ends: 15 [2019-12-07 12:22:07,904 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-07 12:22:07,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-12-07 12:22:07,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2019-12-07 12:22:07,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-12-07 12:22:07,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2019-12-07 12:22:07,930 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 18 transitions. Word has length 3 [2019-12-07 12:22:07,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 12:22:07,930 INFO L462 AbstractCegarLoop]: Abstraction has 15 states and 18 transitions. [2019-12-07 12:22:07,930 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-12-07 12:22:07,930 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 18 transitions. [2019-12-07 12:22:07,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-12-07 12:22:07,930 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 12:22:07,930 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-12-07 12:22:07,930 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2019-12-07 12:22:07,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 12:22:07,931 INFO L82 PathProgramCache]: Analyzing trace with hash 107410, now seen corresponding path program 1 times [2019-12-07 12:22:07,931 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 12:22:07,931 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753596316] [2019-12-07 12:22:07,931 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 12:22:07,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:22:07,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 12:22:07,974 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753596316] [2019-12-07 12:22:07,974 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 12:22:07,975 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-12-07 12:22:07,975 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110238934] [2019-12-07 12:22:07,976 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-07 12:22:07,976 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 12:22:07,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-07 12:22:07,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-12-07 12:22:07,977 INFO L87 Difference]: Start difference. First operand 15 states and 18 transitions. Second operand 4 states. [2019-12-07 12:22:08,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 12:22:08,009 INFO L93 Difference]: Finished difference Result 17 states and 20 transitions. [2019-12-07 12:22:08,009 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-12-07 12:22:08,009 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 3 [2019-12-07 12:22:08,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 12:22:08,010 INFO L225 Difference]: With dead ends: 17 [2019-12-07 12:22:08,010 INFO L226 Difference]: Without dead ends: 17 [2019-12-07 12:22:08,010 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-12-07 12:22:08,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-12-07 12:22:08,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2019-12-07 12:22:08,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-12-07 12:22:08,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2019-12-07 12:22:08,014 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 3 [2019-12-07 12:22:08,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 12:22:08,014 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2019-12-07 12:22:08,014 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-07 12:22:08,014 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2019-12-07 12:22:08,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-12-07 12:22:08,014 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 12:22:08,014 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1] [2019-12-07 12:22:08,015 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2019-12-07 12:22:08,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 12:22:08,015 INFO L82 PathProgramCache]: Analyzing trace with hash 103264994, now seen corresponding path program 1 times [2019-12-07 12:22:08,015 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 12:22:08,015 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65393812] [2019-12-07 12:22:08,015 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 12:22:08,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:22:08,074 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 12:22:08,074 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65393812] [2019-12-07 12:22:08,074 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833607782] [2019-12-07 12:22:08,074 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3d063d6d-7483-49e0-b64b-d970c86151e0/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 [2019-12-07 12:22:08,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:22:08,106 INFO L264 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-07 12:22:08,109 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 12:22:08,143 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-12-07 12:22:08,144 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 12:22:08,150 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 12:22:08,151 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-12-07 12:22:08,151 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2019-12-07 12:22:08,171 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 12:22:08,172 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 12:22:08,193 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 12:22:08,212 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 12:22:08,212 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1124685263] [2019-12-07 12:22:08,227 INFO L159 IcfgInterpreter]: Started Sifa with 4 locations of interest [2019-12-07 12:22:08,227 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 12:22:08,231 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-12-07 12:22:08,235 INFO L176 IcfgInterpreter]: Starting interpretation [2019-12-07 12:22:08,235 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-12-07 12:22:08,630 INFO L180 IcfgInterpreter]: Interpretation finished [2019-12-07 12:22:09,068 WARN L192 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 73 [2019-12-07 12:22:09,151 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 12:22:09,152 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-12-07 12:22:09,152 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2019-12-07 12:22:09,152 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448551194] [2019-12-07 12:22:09,152 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-07 12:22:09,152 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 12:22:09,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-07 12:22:09,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2019-12-07 12:22:09,153 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand 9 states. [2019-12-07 12:22:09,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 12:22:09,197 INFO L93 Difference]: Finished difference Result 16 states and 19 transitions. [2019-12-07 12:22:09,197 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-07 12:22:09,197 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 5 [2019-12-07 12:22:09,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 12:22:09,198 INFO L225 Difference]: With dead ends: 16 [2019-12-07 12:22:09,198 INFO L226 Difference]: Without dead ends: 16 [2019-12-07 12:22:09,198 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2019-12-07 12:22:09,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-12-07 12:22:09,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2019-12-07 12:22:09,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-12-07 12:22:09,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2019-12-07 12:22:09,200 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 18 transitions. Word has length 5 [2019-12-07 12:22:09,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 12:22:09,201 INFO L462 AbstractCegarLoop]: Abstraction has 15 states and 18 transitions. [2019-12-07 12:22:09,201 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-07 12:22:09,201 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 18 transitions. [2019-12-07 12:22:09,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-12-07 12:22:09,201 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 12:22:09,201 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-12-07 12:22:09,402 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 12:22:09,402 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2019-12-07 12:22:09,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 12:22:09,403 INFO L82 PathProgramCache]: Analyzing trace with hash 455031032, now seen corresponding path program 1 times [2019-12-07 12:22:09,403 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 12:22:09,404 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132967925] [2019-12-07 12:22:09,404 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 12:22:09,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:22:09,560 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 12:22:09,561 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132967925] [2019-12-07 12:22:09,562 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 12:22:09,562 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-12-07 12:22:09,562 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081533384] [2019-12-07 12:22:09,563 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-12-07 12:22:09,563 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 12:22:09,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-12-07 12:22:09,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-12-07 12:22:09,564 INFO L87 Difference]: Start difference. First operand 15 states and 18 transitions. Second operand 6 states. [2019-12-07 12:22:09,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 12:22:09,637 INFO L93 Difference]: Finished difference Result 16 states and 19 transitions. [2019-12-07 12:22:09,637 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-07 12:22:09,637 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 7 [2019-12-07 12:22:09,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 12:22:09,637 INFO L225 Difference]: With dead ends: 16 [2019-12-07 12:22:09,638 INFO L226 Difference]: Without dead ends: 16 [2019-12-07 12:22:09,638 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-12-07 12:22:09,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-12-07 12:22:09,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 14. [2019-12-07 12:22:09,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-12-07 12:22:09,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 17 transitions. [2019-12-07 12:22:09,640 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 17 transitions. Word has length 7 [2019-12-07 12:22:09,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 12:22:09,640 INFO L462 AbstractCegarLoop]: Abstraction has 14 states and 17 transitions. [2019-12-07 12:22:09,640 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-12-07 12:22:09,640 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 17 transitions. [2019-12-07 12:22:09,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-12-07 12:22:09,640 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 12:22:09,640 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-12-07 12:22:09,640 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2019-12-07 12:22:09,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 12:22:09,641 INFO L82 PathProgramCache]: Analyzing trace with hash 455031033, now seen corresponding path program 1 times [2019-12-07 12:22:09,641 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 12:22:09,641 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523328388] [2019-12-07 12:22:09,641 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 12:22:09,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:22:09,763 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 12:22:09,763 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523328388] [2019-12-07 12:22:09,763 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 12:22:09,763 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-12-07 12:22:09,763 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405277320] [2019-12-07 12:22:09,764 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-07 12:22:09,764 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 12:22:09,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-07 12:22:09,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-12-07 12:22:09,765 INFO L87 Difference]: Start difference. First operand 14 states and 17 transitions. Second operand 8 states. [2019-12-07 12:22:09,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 12:22:09,874 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2019-12-07 12:22:09,874 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-07 12:22:09,874 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 7 [2019-12-07 12:22:09,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 12:22:09,875 INFO L225 Difference]: With dead ends: 21 [2019-12-07 12:22:09,875 INFO L226 Difference]: Without dead ends: 21 [2019-12-07 12:22:09,875 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2019-12-07 12:22:09,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-12-07 12:22:09,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 16. [2019-12-07 12:22:09,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-12-07 12:22:09,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2019-12-07 12:22:09,877 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 7 [2019-12-07 12:22:09,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 12:22:09,877 INFO L462 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2019-12-07 12:22:09,877 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-07 12:22:09,877 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2019-12-07 12:22:09,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-12-07 12:22:09,878 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 12:22:09,878 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 12:22:09,878 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2019-12-07 12:22:09,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 12:22:09,878 INFO L82 PathProgramCache]: Analyzing trace with hash 1221796978, now seen corresponding path program 1 times [2019-12-07 12:22:09,878 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 12:22:09,878 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983329850] [2019-12-07 12:22:09,879 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 12:22:09,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:22:09,978 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 12:22:09,978 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983329850] [2019-12-07 12:22:09,978 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811549772] [2019-12-07 12:22:09,978 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3d063d6d-7483-49e0-b64b-d970c86151e0/bin/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 12:22:10,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:22:10,009 INFO L264 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-07 12:22:10,010 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 12:22:10,031 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 12:22:10,031 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 12:22:10,048 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 12:22:10,048 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-12-07 12:22:10,048 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [5] total 9 [2019-12-07 12:22:10,048 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65095155] [2019-12-07 12:22:10,048 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-12-07 12:22:10,048 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 12:22:10,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-12-07 12:22:10,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2019-12-07 12:22:10,049 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand 6 states. [2019-12-07 12:22:10,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 12:22:10,060 INFO L93 Difference]: Finished difference Result 15 states and 18 transitions. [2019-12-07 12:22:10,061 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-07 12:22:10,061 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 8 [2019-12-07 12:22:10,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 12:22:10,061 INFO L225 Difference]: With dead ends: 15 [2019-12-07 12:22:10,061 INFO L226 Difference]: Without dead ends: 12 [2019-12-07 12:22:10,061 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2019-12-07 12:22:10,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2019-12-07 12:22:10,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2019-12-07 12:22:10,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2019-12-07 12:22:10,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2019-12-07 12:22:10,063 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 8 [2019-12-07 12:22:10,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 12:22:10,063 INFO L462 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2019-12-07 12:22:10,063 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-12-07 12:22:10,063 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2019-12-07 12:22:10,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-07 12:22:10,063 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 12:22:10,063 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 12:22:10,264 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 12:22:10,264 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2019-12-07 12:22:10,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 12:22:10,265 INFO L82 PathProgramCache]: Analyzing trace with hash -1770163287, now seen corresponding path program 1 times [2019-12-07 12:22:10,265 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 12:22:10,265 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485947733] [2019-12-07 12:22:10,265 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 12:22:10,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:22:10,444 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 12:22:10,444 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485947733] [2019-12-07 12:22:10,444 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33496176] [2019-12-07 12:22:10,444 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3d063d6d-7483-49e0-b64b-d970c86151e0/bin/utaipan/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 12:22:10,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:22:10,475 INFO L264 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-07 12:22:10,476 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 12:22:10,506 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 12:22:10,506 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 12:22:10,547 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 12:22:10,548 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1491225748] [2019-12-07 12:22:10,548 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2019-12-07 12:22:10,549 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 12:22:10,549 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-12-07 12:22:10,549 INFO L176 IcfgInterpreter]: Starting interpretation [2019-12-07 12:22:10,549 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-12-07 12:22:10,902 INFO L180 IcfgInterpreter]: Interpretation finished [2019-12-07 12:22:11,046 WARN L192 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 69 [2019-12-07 12:22:11,582 WARN L192 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 85 [2019-12-07 12:22:11,726 WARN L192 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2019-12-07 12:22:11,869 WARN L192 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 66 [2019-12-07 12:22:12,004 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 12:22:12,005 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-12-07 12:22:12,005 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2019-12-07 12:22:12,005 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118947147] [2019-12-07 12:22:12,005 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-07 12:22:12,005 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 12:22:12,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-07 12:22:12,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2019-12-07 12:22:12,006 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand 13 states. [2019-12-07 12:22:12,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 12:22:12,084 INFO L93 Difference]: Finished difference Result 20 states and 21 transitions. [2019-12-07 12:22:12,084 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-07 12:22:12,084 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2019-12-07 12:22:12,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 12:22:12,085 INFO L225 Difference]: With dead ends: 20 [2019-12-07 12:22:12,085 INFO L226 Difference]: Without dead ends: 15 [2019-12-07 12:22:12,085 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2019-12-07 12:22:12,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-12-07 12:22:12,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2019-12-07 12:22:12,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-12-07 12:22:12,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2019-12-07 12:22:12,086 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 11 [2019-12-07 12:22:12,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 12:22:12,086 INFO L462 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2019-12-07 12:22:12,087 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-07 12:22:12,087 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2019-12-07 12:22:12,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-07 12:22:12,087 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 12:22:12,087 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 12:22:12,287 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 12:22:12,289 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2019-12-07 12:22:12,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 12:22:12,289 INFO L82 PathProgramCache]: Analyzing trace with hash 1854354169, now seen corresponding path program 2 times [2019-12-07 12:22:12,290 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 12:22:12,290 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465977261] [2019-12-07 12:22:12,290 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 12:22:12,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:22:12,472 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 12:22:12,472 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465977261] [2019-12-07 12:22:12,473 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921295499] [2019-12-07 12:22:12,473 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3d063d6d-7483-49e0-b64b-d970c86151e0/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 [2019-12-07 12:22:12,509 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-07 12:22:12,510 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 12:22:12,510 INFO L264 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 44 conjunts are in the unsatisfiable core [2019-12-07 12:22:12,512 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 12:22:14,795 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-12-07 12:22:14,795 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 12:22:15,192 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-12-07 12:22:15,192 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1994417285] [2019-12-07 12:22:15,193 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2019-12-07 12:22:15,194 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 12:22:15,194 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-12-07 12:22:15,194 INFO L176 IcfgInterpreter]: Starting interpretation [2019-12-07 12:22:15,194 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-12-07 12:22:15,514 INFO L180 IcfgInterpreter]: Interpretation finished [2019-12-07 12:22:15,697 WARN L192 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 69 [2019-12-07 12:22:16,631 WARN L192 SmtUtils]: Spent 526.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 85 [2019-12-07 12:22:16,831 WARN L192 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2019-12-07 12:22:17,017 WARN L192 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 66 [2019-12-07 12:22:17,195 WARN L192 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 65 [2019-12-07 12:22:17,196 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 12:22:17,196 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-12-07 12:22:17,196 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 28 [2019-12-07 12:22:17,196 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672462055] [2019-12-07 12:22:17,197 INFO L442 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-12-07 12:22:17,197 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 12:22:17,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-12-07 12:22:17,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=1245, Unknown=1, NotChecked=0, Total=1406 [2019-12-07 12:22:17,198 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 30 states. [2019-12-07 12:22:17,814 WARN L192 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 26 [2019-12-07 12:22:18,612 WARN L192 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2019-12-07 12:22:21,163 WARN L192 SmtUtils]: Spent 2.17 s on a formula simplification. DAG size of input: 64 DAG size of output: 59 [2019-12-07 12:22:21,516 WARN L192 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 58 [2019-12-07 12:22:21,769 WARN L192 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 64 [2019-12-07 12:22:22,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 12:22:22,021 INFO L93 Difference]: Finished difference Result 45 states and 47 transitions. [2019-12-07 12:22:22,021 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-12-07 12:22:22,021 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 13 [2019-12-07 12:22:22,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 12:22:22,022 INFO L225 Difference]: With dead ends: 45 [2019-12-07 12:22:22,022 INFO L226 Difference]: Without dead ends: 45 [2019-12-07 12:22:22,024 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 797 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=547, Invalid=3612, Unknown=1, NotChecked=0, Total=4160 [2019-12-07 12:22:22,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-12-07 12:22:22,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 29. [2019-12-07 12:22:22,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-12-07 12:22:22,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2019-12-07 12:22:22,027 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 13 [2019-12-07 12:22:22,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 12:22:22,027 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2019-12-07 12:22:22,027 INFO L463 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-12-07 12:22:22,027 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2019-12-07 12:22:22,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-12-07 12:22:22,027 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 12:22:22,028 INFO L410 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 1, 1, 1, 1] [2019-12-07 12:22:22,228 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 12:22:22,229 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2019-12-07 12:22:22,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 12:22:22,230 INFO L82 PathProgramCache]: Analyzing trace with hash -2008306775, now seen corresponding path program 3 times [2019-12-07 12:22:22,230 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 12:22:22,230 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233468430] [2019-12-07 12:22:22,231 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 12:22:22,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:22:22,379 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 12:22:22,380 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233468430] [2019-12-07 12:22:22,380 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564313981] [2019-12-07 12:22:22,380 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3d063d6d-7483-49e0-b64b-d970c86151e0/bin/utaipan/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 12:22:22,419 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-07 12:22:22,419 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 12:22:22,420 INFO L264 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 20 conjunts are in the unsatisfiable core [2019-12-07 12:22:22,421 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 12:22:22,484 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 12:22:22,484 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 12:22:22,698 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 12:22:22,698 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [971980396] [2019-12-07 12:22:22,699 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2019-12-07 12:22:22,699 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 12:22:22,699 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-12-07 12:22:22,699 INFO L176 IcfgInterpreter]: Starting interpretation [2019-12-07 12:22:22,699 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-12-07 12:22:22,935 INFO L180 IcfgInterpreter]: Interpretation finished [2019-12-07 12:22:23,098 WARN L192 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 69 [2019-12-07 12:22:23,750 WARN L192 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 85 [2019-12-07 12:22:24,067 WARN L192 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 66 [2019-12-07 12:22:24,222 WARN L192 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 65 [2019-12-07 12:22:24,223 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 12:22:24,223 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-12-07 12:22:24,223 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2019-12-07 12:22:24,223 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213184909] [2019-12-07 12:22:24,224 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-12-07 12:22:24,224 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 12:22:24,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-12-07 12:22:24,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1019, Unknown=0, NotChecked=0, Total=1122 [2019-12-07 12:22:24,224 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 26 states. [2019-12-07 12:22:24,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 12:22:24,490 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2019-12-07 12:22:24,490 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-12-07 12:22:24,490 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 23 [2019-12-07 12:22:24,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 12:22:24,491 INFO L225 Difference]: With dead ends: 60 [2019-12-07 12:22:24,491 INFO L226 Difference]: Without dead ends: 47 [2019-12-07 12:22:24,491 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=159, Invalid=1481, Unknown=0, NotChecked=0, Total=1640 [2019-12-07 12:22:24,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-12-07 12:22:24,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 31. [2019-12-07 12:22:24,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-12-07 12:22:24,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2019-12-07 12:22:24,494 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 23 [2019-12-07 12:22:24,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 12:22:24,494 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2019-12-07 12:22:24,494 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-12-07 12:22:24,494 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2019-12-07 12:22:24,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-12-07 12:22:24,494 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 12:22:24,495 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1] [2019-12-07 12:22:24,695 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 12:22:24,696 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2019-12-07 12:22:24,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 12:22:24,697 INFO L82 PathProgramCache]: Analyzing trace with hash -442436871, now seen corresponding path program 4 times [2019-12-07 12:22:24,697 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 12:22:24,697 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938681698] [2019-12-07 12:22:24,698 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 12:22:24,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:22:24,981 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 12:22:24,981 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938681698] [2019-12-07 12:22:24,981 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762605678] [2019-12-07 12:22:24,981 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3d063d6d-7483-49e0-b64b-d970c86151e0/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 [2019-12-07 12:22:25,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:22:25,029 INFO L264 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 59 conjunts are in the unsatisfiable core [2019-12-07 12:22:25,031 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 12:22:25,455 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 12:22:25,455 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 12:22:26,102 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 16 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 12:22:26,103 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1953635798] [2019-12-07 12:22:26,104 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2019-12-07 12:22:26,104 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 12:22:26,104 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-12-07 12:22:26,105 INFO L176 IcfgInterpreter]: Starting interpretation [2019-12-07 12:22:26,105 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-12-07 12:22:26,414 INFO L180 IcfgInterpreter]: Interpretation finished [2019-12-07 12:22:26,605 WARN L192 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 69 [2019-12-07 12:22:27,404 WARN L192 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 85 [2019-12-07 12:22:27,783 WARN L192 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 66 [2019-12-07 12:22:28,020 WARN L192 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 65 [2019-12-07 12:22:28,021 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 12:22:28,021 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-12-07 12:22:28,022 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 41 [2019-12-07 12:22:28,022 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889691816] [2019-12-07 12:22:28,022 INFO L442 AbstractCegarLoop]: Interpolant automaton has 43 states [2019-12-07 12:22:28,022 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 12:22:28,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2019-12-07 12:22:28,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=2357, Unknown=0, NotChecked=0, Total=2550 [2019-12-07 12:22:28,024 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand 43 states. [2019-12-07 12:22:28,374 WARN L192 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 43 [2019-12-07 12:22:31,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 12:22:31,723 INFO L93 Difference]: Finished difference Result 75 states and 78 transitions. [2019-12-07 12:22:31,723 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2019-12-07 12:22:31,723 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 25 [2019-12-07 12:22:31,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 12:22:31,724 INFO L225 Difference]: With dead ends: 75 [2019-12-07 12:22:31,724 INFO L226 Difference]: Without dead ends: 75 [2019-12-07 12:22:31,726 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1750 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=710, Invalid=6430, Unknown=0, NotChecked=0, Total=7140 [2019-12-07 12:22:31,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2019-12-07 12:22:31,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 30. [2019-12-07 12:22:31,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-12-07 12:22:31,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2019-12-07 12:22:31,728 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 25 [2019-12-07 12:22:31,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 12:22:31,729 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2019-12-07 12:22:31,729 INFO L463 AbstractCegarLoop]: Interpolant automaton has 43 states. [2019-12-07 12:22:31,729 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2019-12-07 12:22:31,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-12-07 12:22:31,729 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 12:22:31,729 INFO L410 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 2, 2, 1, 1, 1, 1] [2019-12-07 12:22:31,930 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 12:22:31,930 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2019-12-07 12:22:31,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 12:22:31,930 INFO L82 PathProgramCache]: Analyzing trace with hash -2135926007, now seen corresponding path program 5 times [2019-12-07 12:22:31,930 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 12:22:31,930 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245731935] [2019-12-07 12:22:31,931 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 12:22:31,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:22:32,008 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 24 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 12:22:32,008 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245731935] [2019-12-07 12:22:32,008 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482186920] [2019-12-07 12:22:32,008 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3d063d6d-7483-49e0-b64b-d970c86151e0/bin/utaipan/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 12:22:32,052 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-12-07 12:22:32,053 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 12:22:32,054 INFO L264 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 26 conjunts are in the unsatisfiable core [2019-12-07 12:22:32,055 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 12:22:32,087 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 24 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 12:22:32,087 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 12:22:32,186 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 26 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 12:22:32,186 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1683242985] [2019-12-07 12:22:32,187 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2019-12-07 12:22:32,187 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 12:22:32,187 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-12-07 12:22:32,187 INFO L176 IcfgInterpreter]: Starting interpretation [2019-12-07 12:22:32,187 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-12-07 12:22:32,460 INFO L180 IcfgInterpreter]: Interpretation finished [2019-12-07 12:22:32,610 WARN L192 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 69 [2019-12-07 12:22:33,203 WARN L192 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 85 [2019-12-07 12:22:33,372 WARN L192 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2019-12-07 12:22:33,522 WARN L192 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 66 [2019-12-07 12:22:33,670 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 12:22:33,671 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-12-07 12:22:33,671 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2019-12-07 12:22:33,671 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38585063] [2019-12-07 12:22:33,671 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-12-07 12:22:33,671 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 12:22:33,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-12-07 12:22:33,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=767, Unknown=0, NotChecked=0, Total=870 [2019-12-07 12:22:33,672 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 22 states. [2019-12-07 12:22:33,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 12:22:33,903 INFO L93 Difference]: Finished difference Result 41 states and 42 transitions. [2019-12-07 12:22:33,904 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-07 12:22:33,904 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2019-12-07 12:22:33,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 12:22:33,904 INFO L225 Difference]: With dead ends: 41 [2019-12-07 12:22:33,904 INFO L226 Difference]: Without dead ends: 30 [2019-12-07 12:22:33,905 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=235, Invalid=1171, Unknown=0, NotChecked=0, Total=1406 [2019-12-07 12:22:33,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-12-07 12:22:33,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2019-12-07 12:22:33,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-12-07 12:22:33,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2019-12-07 12:22:33,906 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 25 [2019-12-07 12:22:33,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 12:22:33,907 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2019-12-07 12:22:33,907 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-12-07 12:22:33,907 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2019-12-07 12:22:33,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-12-07 12:22:33,907 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 12:22:33,907 INFO L410 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 1, 1, 1, 1] [2019-12-07 12:22:34,108 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 12:22:34,109 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2019-12-07 12:22:34,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 12:22:34,110 INFO L82 PathProgramCache]: Analyzing trace with hash 1972514217, now seen corresponding path program 6 times [2019-12-07 12:22:34,110 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 12:22:34,110 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674003445] [2019-12-07 12:22:34,110 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 12:22:34,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:22:34,233 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 8 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 12:22:34,234 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674003445] [2019-12-07 12:22:34,234 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890740560] [2019-12-07 12:22:34,234 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3d063d6d-7483-49e0-b64b-d970c86151e0/bin/utaipan/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 12:22:34,282 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-07 12:22:34,282 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 12:22:34,283 INFO L264 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 45 conjunts are in the unsatisfiable core [2019-12-07 12:22:34,285 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 12:22:34,552 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 18 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 12:22:34,552 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 12:22:35,083 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 8 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 12:22:35,084 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [260065645] [2019-12-07 12:22:35,085 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2019-12-07 12:22:35,085 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 12:22:35,085 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-12-07 12:22:35,085 INFO L176 IcfgInterpreter]: Starting interpretation [2019-12-07 12:22:35,085 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-12-07 12:22:35,344 INFO L180 IcfgInterpreter]: Interpretation finished [2019-12-07 12:22:35,529 WARN L192 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 69 [2019-12-07 12:22:36,280 WARN L192 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 85 [2019-12-07 12:22:36,636 WARN L192 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 66 [2019-12-07 12:22:36,818 WARN L192 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 65 [2019-12-07 12:22:36,819 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 12:22:36,819 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-12-07 12:22:36,819 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 18, 18] total 45 [2019-12-07 12:22:36,820 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856028125] [2019-12-07 12:22:36,820 INFO L442 AbstractCegarLoop]: Interpolant automaton has 46 states [2019-12-07 12:22:36,820 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 12:22:36,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2019-12-07 12:22:36,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=2655, Unknown=0, NotChecked=0, Total=2862 [2019-12-07 12:22:36,821 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 46 states. [2019-12-07 12:22:38,182 WARN L192 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 28 [2019-12-07 12:22:38,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 12:22:38,205 INFO L93 Difference]: Finished difference Result 50 states and 51 transitions. [2019-12-07 12:22:38,206 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-12-07 12:22:38,207 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 29 [2019-12-07 12:22:38,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 12:22:38,208 INFO L225 Difference]: With dead ends: 50 [2019-12-07 12:22:38,208 INFO L226 Difference]: Without dead ends: 33 [2019-12-07 12:22:38,212 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 928 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=445, Invalid=3977, Unknown=0, NotChecked=0, Total=4422 [2019-12-07 12:22:38,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-12-07 12:22:38,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2019-12-07 12:22:38,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-12-07 12:22:38,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2019-12-07 12:22:38,219 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 29 [2019-12-07 12:22:38,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 12:22:38,220 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2019-12-07 12:22:38,220 INFO L463 AbstractCegarLoop]: Interpolant automaton has 46 states. [2019-12-07 12:22:38,220 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2019-12-07 12:22:38,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-12-07 12:22:38,222 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 12:22:38,222 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1, 1] [2019-12-07 12:22:38,423 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 12:22:38,424 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2019-12-07 12:22:38,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 12:22:38,425 INFO L82 PathProgramCache]: Analyzing trace with hash 562608377, now seen corresponding path program 7 times [2019-12-07 12:22:38,425 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 12:22:38,425 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558197303] [2019-12-07 12:22:38,426 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 12:22:38,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:22:38,787 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 12:22:38,787 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558197303] [2019-12-07 12:22:38,787 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108550259] [2019-12-07 12:22:38,787 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3d063d6d-7483-49e0-b64b-d970c86151e0/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 [2019-12-07 12:22:38,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:22:38,835 INFO L264 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 65 conjunts are in the unsatisfiable core [2019-12-07 12:22:38,837 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 12:22:39,141 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 12:22:39,141 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 12:22:40,811 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 12:22:40,811 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [793067660] [2019-12-07 12:22:40,812 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2019-12-07 12:22:40,813 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 12:22:40,813 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-12-07 12:22:40,813 INFO L176 IcfgInterpreter]: Starting interpretation [2019-12-07 12:22:40,814 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-12-07 12:22:41,191 INFO L180 IcfgInterpreter]: Interpretation finished [2019-12-07 12:22:41,380 WARN L192 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 69 [2019-12-07 12:22:41,737 WARN L192 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 73 [2019-12-07 12:22:42,109 WARN L192 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 74 [2019-12-07 12:22:42,482 WARN L192 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 69 [2019-12-07 12:22:42,823 WARN L192 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2019-12-07 12:22:43,207 WARN L192 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 66 [2019-12-07 12:22:43,598 WARN L192 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 65 [2019-12-07 12:22:43,600 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 12:22:43,600 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-12-07 12:22:43,600 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 15] total 41 [2019-12-07 12:22:43,600 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024651384] [2019-12-07 12:22:43,601 INFO L442 AbstractCegarLoop]: Interpolant automaton has 43 states [2019-12-07 12:22:43,601 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 12:22:43,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2019-12-07 12:22:43,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=2330, Unknown=0, NotChecked=0, Total=2550 [2019-12-07 12:22:43,603 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand 43 states. [2019-12-07 12:22:47,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 12:22:47,946 INFO L93 Difference]: Finished difference Result 115 states and 123 transitions. [2019-12-07 12:22:47,947 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2019-12-07 12:22:47,947 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 31 [2019-12-07 12:22:47,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 12:22:47,948 INFO L225 Difference]: With dead ends: 115 [2019-12-07 12:22:47,948 INFO L226 Difference]: Without dead ends: 115 [2019-12-07 12:22:47,951 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 57 SyntacticMatches, 2 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1759 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=1142, Invalid=7230, Unknown=0, NotChecked=0, Total=8372 [2019-12-07 12:22:47,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2019-12-07 12:22:47,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 74. [2019-12-07 12:22:47,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2019-12-07 12:22:47,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 83 transitions. [2019-12-07 12:22:47,956 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 83 transitions. Word has length 31 [2019-12-07 12:22:47,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 12:22:47,957 INFO L462 AbstractCegarLoop]: Abstraction has 74 states and 83 transitions. [2019-12-07 12:22:47,957 INFO L463 AbstractCegarLoop]: Interpolant automaton has 43 states. [2019-12-07 12:22:47,957 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 83 transitions. [2019-12-07 12:22:47,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-12-07 12:22:47,958 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 12:22:47,958 INFO L410 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 1, 1, 1, 1] [2019-12-07 12:22:48,158 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 12:22:48,160 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2019-12-07 12:22:48,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 12:22:48,160 INFO L82 PathProgramCache]: Analyzing trace with hash 1277621161, now seen corresponding path program 8 times [2019-12-07 12:22:48,160 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 12:22:48,161 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520618061] [2019-12-07 12:22:48,161 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 12:22:48,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:22:48,323 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 10 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 12:22:48,324 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520618061] [2019-12-07 12:22:48,324 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581089706] [2019-12-07 12:22:48,324 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3d063d6d-7483-49e0-b64b-d970c86151e0/bin/utaipan/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 12:22:48,381 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-12-07 12:22:48,381 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 12:22:48,383 INFO L264 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 70 conjunts are in the unsatisfiable core [2019-12-07 12:22:48,384 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 12:22:51,293 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 4 proven. 67 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-12-07 12:22:51,293 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 12:22:54,527 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-12-07 12:22:54,527 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1770237706] [2019-12-07 12:22:54,528 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2019-12-07 12:22:54,528 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 12:22:54,528 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-12-07 12:22:54,528 INFO L176 IcfgInterpreter]: Starting interpretation [2019-12-07 12:22:54,528 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-12-07 12:22:54,757 INFO L180 IcfgInterpreter]: Interpretation finished [2019-12-07 12:22:54,978 WARN L192 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 69 [2019-12-07 12:22:55,826 WARN L192 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 85 [2019-12-07 12:22:56,222 WARN L192 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 66 [2019-12-07 12:22:56,444 WARN L192 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 65 [2019-12-07 12:22:56,445 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 12:22:56,445 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-12-07 12:22:56,445 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 19, 16] total 49 [2019-12-07 12:22:56,445 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506219446] [2019-12-07 12:22:56,445 INFO L442 AbstractCegarLoop]: Interpolant automaton has 50 states [2019-12-07 12:22:56,445 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 12:22:56,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2019-12-07 12:22:56,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=3066, Unknown=3, NotChecked=0, Total=3306 [2019-12-07 12:22:56,446 INFO L87 Difference]: Start difference. First operand 74 states and 83 transitions. Second operand 50 states. [2019-12-07 12:22:59,657 WARN L192 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 45 [2019-12-07 12:23:04,020 WARN L192 SmtUtils]: Spent 903.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 45 [2019-12-07 12:23:05,490 WARN L192 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 38 [2019-12-07 12:23:08,561 WARN L192 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 33 [2019-12-07 12:23:09,934 WARN L192 SmtUtils]: Spent 478.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 34 [2019-12-07 12:23:12,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 12:23:12,319 INFO L93 Difference]: Finished difference Result 90 states and 97 transitions. [2019-12-07 12:23:12,320 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2019-12-07 12:23:12,320 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 35 [2019-12-07 12:23:12,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 12:23:12,320 INFO L225 Difference]: With dead ends: 90 [2019-12-07 12:23:12,320 INFO L226 Difference]: Without dead ends: 0 [2019-12-07 12:23:12,322 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1554 ImplicationChecksByTransitivity, 20.5s TimeCoverageRelationStatistics Valid=1245, Invalid=8258, Unknown=3, NotChecked=0, Total=9506 [2019-12-07 12:23:12,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-12-07 12:23:12,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-12-07 12:23:12,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-12-07 12:23:12,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-12-07 12:23:12,323 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 35 [2019-12-07 12:23:12,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 12:23:12,323 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-12-07 12:23:12,323 INFO L463 AbstractCegarLoop]: Interpolant automaton has 50 states. [2019-12-07 12:23:12,323 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-12-07 12:23:12,323 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-12-07 12:23:12,523 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 12:23:12,534 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.12 12:23:12 BoogieIcfgContainer [2019-12-07 12:23:12,534 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-12-07 12:23:12,535 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-12-07 12:23:12,535 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-12-07 12:23:12,535 INFO L275 PluginConnector]: Witness Printer initialized [2019-12-07 12:23:12,536 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 12:22:07" (3/4) ... [2019-12-07 12:23:12,543 INFO L137 WitnessPrinter]: Generating witness for correct program [2019-12-07 12:23:12,562 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 18 nodes and edges [2019-12-07 12:23:12,563 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2019-12-07 12:23:12,563 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2019-12-07 12:23:12,595 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_3d063d6d-7483-49e0-b64b-d970c86151e0/bin/utaipan/witness.graphml [2019-12-07 12:23:12,595 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-12-07 12:23:12,596 INFO L168 Benchmark]: Toolchain (without parser) took 65525.23 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 273.2 MB). Free memory was 939.8 MB in the beginning and 969.6 MB in the end (delta: -29.8 MB). Peak memory consumption was 243.4 MB. Max. memory is 11.5 GB. [2019-12-07 12:23:12,596 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 1.0 GB. Free memory is still 955.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 12:23:12,597 INFO L168 Benchmark]: CACSL2BoogieTranslator took 295.58 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 112.7 MB). Free memory was 934.4 MB in the beginning and 1.1 GB in the end (delta: -162.3 MB). Peak memory consumption was 18.0 MB. Max. memory is 11.5 GB. [2019-12-07 12:23:12,597 INFO L168 Benchmark]: Boogie Procedure Inliner took 28.88 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 12:23:12,597 INFO L168 Benchmark]: Boogie Preprocessor took 18.22 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2019-12-07 12:23:12,597 INFO L168 Benchmark]: RCFGBuilder took 272.76 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 28.3 MB). Peak memory consumption was 28.3 MB. Max. memory is 11.5 GB. [2019-12-07 12:23:12,597 INFO L168 Benchmark]: TraceAbstraction took 64845.62 ms. Allocated memory was 1.1 GB in the beginning and 1.3 GB in the end (delta: 160.4 MB). Free memory was 1.1 GB in the beginning and 981.8 MB in the end (delta: 81.2 MB). Peak memory consumption was 241.7 MB. Max. memory is 11.5 GB. [2019-12-07 12:23:12,597 INFO L168 Benchmark]: Witness Printer took 60.69 ms. Allocated memory is still 1.3 GB. Free memory was 981.8 MB in the beginning and 969.6 MB in the end (delta: 12.3 MB). Peak memory consumption was 12.3 MB. Max. memory is 11.5 GB. [2019-12-07 12:23:12,599 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 ms. Allocated memory is still 1.0 GB. Free memory is still 955.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 295.58 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 112.7 MB). Free memory was 934.4 MB in the beginning and 1.1 GB in the end (delta: -162.3 MB). Peak memory consumption was 18.0 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 28.88 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 18.22 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. * RCFGBuilder took 272.76 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 28.3 MB). Peak memory consumption was 28.3 MB. Max. memory is 11.5 GB. * TraceAbstraction took 64845.62 ms. Allocated memory was 1.1 GB in the beginning and 1.3 GB in the end (delta: 160.4 MB). Free memory was 1.1 GB in the beginning and 981.8 MB in the end (delta: 81.2 MB). Peak memory consumption was 241.7 MB. Max. memory is 11.5 GB. * Witness Printer took 60.69 ms. Allocated memory is still 1.3 GB. Free memory was 981.8 MB in the beginning and 969.6 MB in the end (delta: 12.3 MB). Peak memory consumption was 12.3 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 541]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 541]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 520]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 527]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 520]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - AllSpecificationsHoldResult: All specifications hold 5 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 17 locations, 5 error locations. Result: SAFE, OverallTime: 64.8s, OverallIterations: 14, TraceHistogramMax: 6, AutomataDifference: 31.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 126 SDtfs, 899 SDslu, 815 SDs, 0 SdLazy, 3454 SolverSat, 560 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 5.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 888 GetRequests, 344 SyntacticMatches, 8 SemanticMatches, 536 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7671 ImplicationChecksByTransitivity, 52.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=74occurred in iteration=13, 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, 14 MinimizatonAttempts, 128 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 14.9s InterpolantComputationTime, 430 NumberOfCodeBlocks, 428 NumberOfCodeBlocksAsserted, 36 NumberOfCheckSat, 601 ConstructedInterpolants, 22 QuantifiedInterpolants, 236959 SizeOfPredicates, 100 NumberOfNonLiveVariables, 1369 ConjunctsInSsa, 358 ConjunctsInUnsatCore, 34 InterpolantComputations, 6 PerfectInterpolantSequences, 203/869 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...