./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/locks/test_locks_7.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_929da21f-c2f2-4267-a535-d5cc45e679db/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_929da21f-c2f2-4267-a535-d5cc45e679db/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_929da21f-c2f2-4267-a535-d5cc45e679db/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_929da21f-c2f2-4267-a535-d5cc45e679db/bin/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/locks/test_locks_7.c -s /tmp/vcloud-vcloud-master/worker/run_dir_929da21f-c2f2-4267-a535-d5cc45e679db/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_929da21f-c2f2-4267-a535-d5cc45e679db/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 d2a1f90505878c0035f7701a954d17ca4375eb05 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2020-12-09 20:26:26,605 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 20:26:26,610 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 20:26:26,655 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 20:26:26,656 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 20:26:26,657 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 20:26:26,659 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 20:26:26,661 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 20:26:26,663 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 20:26:26,664 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 20:26:26,665 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 20:26:26,667 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 20:26:26,667 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 20:26:26,668 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 20:26:26,669 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 20:26:26,671 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 20:26:26,672 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 20:26:26,673 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 20:26:26,675 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 20:26:26,677 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 20:26:26,678 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 20:26:26,679 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 20:26:26,681 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 20:26:26,682 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 20:26:26,685 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 20:26:26,685 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 20:26:26,686 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 20:26:26,687 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 20:26:26,687 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 20:26:26,688 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 20:26:26,689 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 20:26:26,690 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 20:26:26,690 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 20:26:26,691 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 20:26:26,692 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 20:26:26,692 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 20:26:26,692 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 20:26:26,693 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 20:26:26,693 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 20:26:26,693 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 20:26:26,694 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 20:26:26,694 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_929da21f-c2f2-4267-a535-d5cc45e679db/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2020-12-09 20:26:26,718 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 20:26:26,718 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 20:26:26,719 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 20:26:26,719 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 20:26:26,719 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 20:26:26,719 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 20:26:26,719 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-09 20:26:26,720 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 20:26:26,720 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 20:26:26,720 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-09 20:26:26,720 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-09 20:26:26,720 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 20:26:26,720 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-09 20:26:26,721 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-09 20:26:26,721 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-09 20:26:26,721 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-09 20:26:26,722 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-09 20:26:26,722 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 20:26:26,722 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 20:26:26,722 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-12-09 20:26:26,722 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 20:26:26,723 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 20:26:26,723 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 20:26:26,723 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-12-09 20:26:26,723 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-12-09 20:26:26,723 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-12-09 20:26:26,724 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 20:26:26,724 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 20:26:26,724 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 20:26:26,724 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 20:26:26,724 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 20:26:26,725 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 20:26:26,725 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 20:26:26,725 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 20:26:26,725 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 20:26:26,725 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-09 20:26:26,726 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-09 20:26:26,726 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 20:26:26,726 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 20:26:26,726 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud-vcloud-master/worker/run_dir_929da21f-c2f2-4267-a535-d5cc45e679db/bin/utaipan/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_929da21f-c2f2-4267-a535-d5cc45e679db/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d2a1f90505878c0035f7701a954d17ca4375eb05 [2020-12-09 20:26:26,893 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 20:26:26,913 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 20:26:26,916 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 20:26:26,917 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 20:26:26,918 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 20:26:26,919 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_929da21f-c2f2-4267-a535-d5cc45e679db/bin/utaipan/../../sv-benchmarks/c/locks/test_locks_7.c [2020-12-09 20:26:26,964 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_929da21f-c2f2-4267-a535-d5cc45e679db/bin/utaipan/data/d59daafa7/126c9a44ba8c43ffb6fdcfced0a490c4/FLAGe55b38dd5 [2020-12-09 20:26:27,331 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 20:26:27,331 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_929da21f-c2f2-4267-a535-d5cc45e679db/sv-benchmarks/c/locks/test_locks_7.c [2020-12-09 20:26:27,336 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_929da21f-c2f2-4267-a535-d5cc45e679db/bin/utaipan/data/d59daafa7/126c9a44ba8c43ffb6fdcfced0a490c4/FLAGe55b38dd5 [2020-12-09 20:26:27,347 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_929da21f-c2f2-4267-a535-d5cc45e679db/bin/utaipan/data/d59daafa7/126c9a44ba8c43ffb6fdcfced0a490c4 [2020-12-09 20:26:27,350 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 20:26:27,351 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 20:26:27,352 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 20:26:27,353 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 20:26:27,355 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 20:26:27,356 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 08:26:27" (1/1) ... [2020-12-09 20:26:27,358 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d8301b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:26:27, skipping insertion in model container [2020-12-09 20:26:27,358 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 08:26:27" (1/1) ... [2020-12-09 20:26:27,363 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 20:26:27,376 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 20:26:27,499 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_929da21f-c2f2-4267-a535-d5cc45e679db/sv-benchmarks/c/locks/test_locks_7.c[2881,2894] [2020-12-09 20:26:27,503 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 20:26:27,511 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 20:26:27,528 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_929da21f-c2f2-4267-a535-d5cc45e679db/sv-benchmarks/c/locks/test_locks_7.c[2881,2894] [2020-12-09 20:26:27,528 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 20:26:27,540 INFO L208 MainTranslator]: Completed translation [2020-12-09 20:26:27,541 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:26:27 WrapperNode [2020-12-09 20:26:27,541 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 20:26:27,541 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 20:26:27,542 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 20:26:27,542 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 20:26:27,547 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:26:27" (1/1) ... [2020-12-09 20:26:27,553 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:26:27" (1/1) ... [2020-12-09 20:26:27,573 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 20:26:27,574 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 20:26:27,574 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 20:26:27,574 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 20:26:27,582 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:26:27" (1/1) ... [2020-12-09 20:26:27,583 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:26:27" (1/1) ... [2020-12-09 20:26:27,585 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:26:27" (1/1) ... [2020-12-09 20:26:27,585 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:26:27" (1/1) ... [2020-12-09 20:26:27,589 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:26:27" (1/1) ... [2020-12-09 20:26:27,594 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:26:27" (1/1) ... [2020-12-09 20:26:27,595 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:26:27" (1/1) ... [2020-12-09 20:26:27,598 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 20:26:27,599 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 20:26:27,599 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 20:26:27,599 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 20:26:27,600 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:26:27" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_929da21f-c2f2-4267-a535-d5cc45e679db/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 20:26:27,670 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 20:26:27,671 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 20:26:27,671 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-09 20:26:27,671 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 20:26:27,978 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 20:26:27,978 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2020-12-09 20:26:27,980 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 08:26:27 BoogieIcfgContainer [2020-12-09 20:26:27,980 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 20:26:27,981 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 20:26:27,981 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 20:26:27,984 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 20:26:27,984 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 08:26:27" (1/3) ... [2020-12-09 20:26:27,985 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24dcee1d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 08:26:27, skipping insertion in model container [2020-12-09 20:26:27,985 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:26:27" (2/3) ... [2020-12-09 20:26:27,985 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24dcee1d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 08:26:27, skipping insertion in model container [2020-12-09 20:26:27,985 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 08:26:27" (3/3) ... [2020-12-09 20:26:27,986 INFO L111 eAbstractionObserver]: Analyzing ICFG test_locks_7.c [2020-12-09 20:26:27,997 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 20:26:27,999 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-09 20:26:28,007 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-09 20:26:28,023 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 20:26:28,023 INFO L378 AbstractCegarLoop]: Hoare is false [2020-12-09 20:26:28,023 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 20:26:28,023 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 20:26:28,023 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 20:26:28,024 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 20:26:28,024 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 20:26:28,024 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 20:26:28,033 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2020-12-09 20:26:28,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-12-09 20:26:28,038 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 20:26:28,038 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-12-09 20:26:28,039 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-12-09 20:26:28,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 20:26:28,043 INFO L82 PathProgramCache]: Analyzing trace with hash 5452362, now seen corresponding path program 1 times [2020-12-09 20:26:28,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 20:26:28,050 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355411294] [2020-12-09 20:26:28,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 20:26:28,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:26:28,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 20:26:28,162 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355411294] [2020-12-09 20:26:28,163 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 20:26:28,163 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 20:26:28,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235165629] [2020-12-09 20:26:28,167 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-09 20:26:28,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 20:26:28,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-09 20:26:28,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-09 20:26:28,179 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 2 states. [2020-12-09 20:26:28,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 20:26:28,188 INFO L93 Difference]: Finished difference Result 23 states and 36 transitions. [2020-12-09 20:26:28,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-09 20:26:28,188 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 4 [2020-12-09 20:26:28,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 20:26:28,194 INFO L225 Difference]: With dead ends: 23 [2020-12-09 20:26:28,194 INFO L226 Difference]: Without dead ends: 22 [2020-12-09 20:26:28,195 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-09 20:26:28,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-12-09 20:26:28,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-12-09 20:26:28,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-12-09 20:26:28,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 35 transitions. [2020-12-09 20:26:28,218 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 35 transitions. Word has length 4 [2020-12-09 20:26:28,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 20:26:28,218 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 35 transitions. [2020-12-09 20:26:28,218 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-09 20:26:28,218 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 35 transitions. [2020-12-09 20:26:28,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-12-09 20:26:28,218 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 20:26:28,218 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-12-09 20:26:28,219 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-09 20:26:28,219 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-12-09 20:26:28,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 20:26:28,220 INFO L82 PathProgramCache]: Analyzing trace with hash 164732346, now seen corresponding path program 1 times [2020-12-09 20:26:28,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 20:26:28,220 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346059879] [2020-12-09 20:26:28,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 20:26:28,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:26:28,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 20:26:28,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346059879] [2020-12-09 20:26:28,254 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 20:26:28,254 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-12-09 20:26:28,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691532840] [2020-12-09 20:26:28,255 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 20:26:28,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 20:26:28,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 20:26:28,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 20:26:28,256 INFO L87 Difference]: Start difference. First operand 22 states and 35 transitions. Second operand 3 states. [2020-12-09 20:26:28,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 20:26:28,259 INFO L93 Difference]: Finished difference Result 21 states and 34 transitions. [2020-12-09 20:26:28,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 20:26:28,259 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2020-12-09 20:26:28,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 20:26:28,260 INFO L225 Difference]: With dead ends: 21 [2020-12-09 20:26:28,260 INFO L226 Difference]: Without dead ends: 19 [2020-12-09 20:26:28,261 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 20:26:28,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-12-09 20:26:28,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-12-09 20:26:28,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-12-09 20:26:28,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 32 transitions. [2020-12-09 20:26:28,263 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 32 transitions. Word has length 5 [2020-12-09 20:26:28,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 20:26:28,263 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 32 transitions. [2020-12-09 20:26:28,263 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 20:26:28,264 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 32 transitions. [2020-12-09 20:26:28,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-09 20:26:28,264 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 20:26:28,264 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-09 20:26:28,264 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-09 20:26:28,264 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-12-09 20:26:28,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 20:26:28,265 INFO L82 PathProgramCache]: Analyzing trace with hash 816096992, now seen corresponding path program 1 times [2020-12-09 20:26:28,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 20:26:28,265 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181282717] [2020-12-09 20:26:28,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 20:26:28,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:26:28,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 20:26:28,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181282717] [2020-12-09 20:26:28,314 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 20:26:28,314 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 20:26:28,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507101415] [2020-12-09 20:26:28,314 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 20:26:28,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 20:26:28,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 20:26:28,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 20:26:28,316 INFO L87 Difference]: Start difference. First operand 19 states and 32 transitions. Second operand 4 states. [2020-12-09 20:26:28,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 20:26:28,339 INFO L93 Difference]: Finished difference Result 35 states and 58 transitions. [2020-12-09 20:26:28,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 20:26:28,339 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-12-09 20:26:28,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 20:26:28,340 INFO L225 Difference]: With dead ends: 35 [2020-12-09 20:26:28,340 INFO L226 Difference]: Without dead ends: 35 [2020-12-09 20:26:28,341 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 20:26:28,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-12-09 20:26:28,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 19. [2020-12-09 20:26:28,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-12-09 20:26:28,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 31 transitions. [2020-12-09 20:26:28,345 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 31 transitions. Word has length 6 [2020-12-09 20:26:28,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 20:26:28,345 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 31 transitions. [2020-12-09 20:26:28,345 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 20:26:28,346 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 31 transitions. [2020-12-09 20:26:28,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-09 20:26:28,346 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 20:26:28,346 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-09 20:26:28,346 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-09 20:26:28,346 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-12-09 20:26:28,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 20:26:28,347 INFO L82 PathProgramCache]: Analyzing trace with hash -470582704, now seen corresponding path program 1 times [2020-12-09 20:26:28,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 20:26:28,348 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300772400] [2020-12-09 20:26:28,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 20:26:28,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:26:28,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 20:26:28,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300772400] [2020-12-09 20:26:28,384 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 20:26:28,384 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 20:26:28,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872279992] [2020-12-09 20:26:28,384 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 20:26:28,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 20:26:28,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 20:26:28,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 20:26:28,385 INFO L87 Difference]: Start difference. First operand 19 states and 31 transitions. Second operand 4 states. [2020-12-09 20:26:28,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 20:26:28,397 INFO L93 Difference]: Finished difference Result 33 states and 53 transitions. [2020-12-09 20:26:28,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 20:26:28,397 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2020-12-09 20:26:28,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 20:26:28,398 INFO L225 Difference]: With dead ends: 33 [2020-12-09 20:26:28,398 INFO L226 Difference]: Without dead ends: 33 [2020-12-09 20:26:28,398 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 20:26:28,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-12-09 20:26:28,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 19. [2020-12-09 20:26:28,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-12-09 20:26:28,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 30 transitions. [2020-12-09 20:26:28,401 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 30 transitions. Word has length 7 [2020-12-09 20:26:28,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 20:26:28,401 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 30 transitions. [2020-12-09 20:26:28,401 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 20:26:28,401 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 30 transitions. [2020-12-09 20:26:28,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-09 20:26:28,401 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 20:26:28,401 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 20:26:28,402 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-09 20:26:28,402 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-12-09 20:26:28,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 20:26:28,402 INFO L82 PathProgramCache]: Analyzing trace with hash -1702947275, now seen corresponding path program 1 times [2020-12-09 20:26:28,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 20:26:28,402 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945137777] [2020-12-09 20:26:28,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 20:26:28,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:26:28,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 20:26:28,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945137777] [2020-12-09 20:26:28,430 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 20:26:28,430 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 20:26:28,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775717828] [2020-12-09 20:26:28,431 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 20:26:28,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 20:26:28,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 20:26:28,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 20:26:28,431 INFO L87 Difference]: Start difference. First operand 19 states and 30 transitions. Second operand 4 states. [2020-12-09 20:26:28,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 20:26:28,444 INFO L93 Difference]: Finished difference Result 31 states and 48 transitions. [2020-12-09 20:26:28,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 20:26:28,444 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2020-12-09 20:26:28,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 20:26:28,445 INFO L225 Difference]: With dead ends: 31 [2020-12-09 20:26:28,445 INFO L226 Difference]: Without dead ends: 31 [2020-12-09 20:26:28,445 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 20:26:28,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-12-09 20:26:28,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 19. [2020-12-09 20:26:28,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-12-09 20:26:28,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 29 transitions. [2020-12-09 20:26:28,447 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 29 transitions. Word has length 8 [2020-12-09 20:26:28,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 20:26:28,447 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 29 transitions. [2020-12-09 20:26:28,447 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 20:26:28,447 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 29 transitions. [2020-12-09 20:26:28,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-09 20:26:28,448 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 20:26:28,448 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 20:26:28,448 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-09 20:26:28,448 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-12-09 20:26:28,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 20:26:28,448 INFO L82 PathProgramCache]: Analyzing trace with hash -1251542971, now seen corresponding path program 1 times [2020-12-09 20:26:28,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 20:26:28,449 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690349370] [2020-12-09 20:26:28,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 20:26:28,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:26:28,478 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 20:26:28,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690349370] [2020-12-09 20:26:28,479 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 20:26:28,479 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 20:26:28,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732688399] [2020-12-09 20:26:28,479 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 20:26:28,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 20:26:28,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 20:26:28,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 20:26:28,480 INFO L87 Difference]: Start difference. First operand 19 states and 29 transitions. Second operand 4 states. [2020-12-09 20:26:28,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 20:26:28,494 INFO L93 Difference]: Finished difference Result 29 states and 43 transitions. [2020-12-09 20:26:28,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 20:26:28,494 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2020-12-09 20:26:28,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 20:26:28,495 INFO L225 Difference]: With dead ends: 29 [2020-12-09 20:26:28,495 INFO L226 Difference]: Without dead ends: 29 [2020-12-09 20:26:28,495 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 20:26:28,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-12-09 20:26:28,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 19. [2020-12-09 20:26:28,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-12-09 20:26:28,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 28 transitions. [2020-12-09 20:26:28,498 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 28 transitions. Word has length 9 [2020-12-09 20:26:28,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 20:26:28,498 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 28 transitions. [2020-12-09 20:26:28,499 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 20:26:28,499 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 28 transitions. [2020-12-09 20:26:28,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-09 20:26:28,499 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 20:26:28,499 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 20:26:28,499 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-09 20:26:28,500 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-12-09 20:26:28,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 20:26:28,500 INFO L82 PathProgramCache]: Analyzing trace with hash -142911094, now seen corresponding path program 1 times [2020-12-09 20:26:28,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 20:26:28,501 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945622036] [2020-12-09 20:26:28,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 20:26:28,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:26:28,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 20:26:28,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945622036] [2020-12-09 20:26:28,533 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 20:26:28,533 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 20:26:28,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766973471] [2020-12-09 20:26:28,534 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 20:26:28,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 20:26:28,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 20:26:28,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 20:26:28,535 INFO L87 Difference]: Start difference. First operand 19 states and 28 transitions. Second operand 4 states. [2020-12-09 20:26:28,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 20:26:28,552 INFO L93 Difference]: Finished difference Result 27 states and 38 transitions. [2020-12-09 20:26:28,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 20:26:28,552 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-12-09 20:26:28,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 20:26:28,553 INFO L225 Difference]: With dead ends: 27 [2020-12-09 20:26:28,553 INFO L226 Difference]: Without dead ends: 27 [2020-12-09 20:26:28,554 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 20:26:28,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-12-09 20:26:28,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 19. [2020-12-09 20:26:28,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-12-09 20:26:28,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 27 transitions. [2020-12-09 20:26:28,556 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 27 transitions. Word has length 10 [2020-12-09 20:26:28,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 20:26:28,557 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 27 transitions. [2020-12-09 20:26:28,557 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 20:26:28,557 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 27 transitions. [2020-12-09 20:26:28,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-09 20:26:28,557 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 20:26:28,557 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 20:26:28,557 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-09 20:26:28,557 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-12-09 20:26:28,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 20:26:28,558 INFO L82 PathProgramCache]: Analyzing trace with hash -135060934, now seen corresponding path program 1 times [2020-12-09 20:26:28,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 20:26:28,558 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805913140] [2020-12-09 20:26:28,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 20:26:28,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:26:28,589 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 20:26:28,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805913140] [2020-12-09 20:26:28,589 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 20:26:28,589 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 20:26:28,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190739553] [2020-12-09 20:26:28,590 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 20:26:28,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 20:26:28,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 20:26:28,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 20:26:28,591 INFO L87 Difference]: Start difference. First operand 19 states and 27 transitions. Second operand 4 states. [2020-12-09 20:26:28,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 20:26:28,602 INFO L93 Difference]: Finished difference Result 25 states and 33 transitions. [2020-12-09 20:26:28,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 20:26:28,603 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2020-12-09 20:26:28,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 20:26:28,603 INFO L225 Difference]: With dead ends: 25 [2020-12-09 20:26:28,603 INFO L226 Difference]: Without dead ends: 25 [2020-12-09 20:26:28,604 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 20:26:28,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-12-09 20:26:28,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 19. [2020-12-09 20:26:28,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-12-09 20:26:28,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 26 transitions. [2020-12-09 20:26:28,606 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 26 transitions. Word has length 11 [2020-12-09 20:26:28,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 20:26:28,606 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 26 transitions. [2020-12-09 20:26:28,606 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 20:26:28,607 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 26 transitions. [2020-12-09 20:26:28,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-09 20:26:28,607 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 20:26:28,607 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 20:26:28,607 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-09 20:26:28,607 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-12-09 20:26:28,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 20:26:28,608 INFO L82 PathProgramCache]: Analyzing trace with hash 108294367, now seen corresponding path program 1 times [2020-12-09 20:26:28,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 20:26:28,608 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619882452] [2020-12-09 20:26:28,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 20:26:28,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:26:28,635 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 20:26:28,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619882452] [2020-12-09 20:26:28,636 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 20:26:28,636 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 20:26:28,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85631918] [2020-12-09 20:26:28,636 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 20:26:28,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 20:26:28,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 20:26:28,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 20:26:28,637 INFO L87 Difference]: Start difference. First operand 19 states and 26 transitions. Second operand 4 states. [2020-12-09 20:26:28,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 20:26:28,650 INFO L93 Difference]: Finished difference Result 19 states and 26 transitions. [2020-12-09 20:26:28,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 20:26:28,650 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-12-09 20:26:28,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 20:26:28,651 INFO L225 Difference]: With dead ends: 19 [2020-12-09 20:26:28,651 INFO L226 Difference]: Without dead ends: 0 [2020-12-09 20:26:28,651 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 20:26:28,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-12-09 20:26:28,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-12-09 20:26:28,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-12-09 20:26:28,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-12-09 20:26:28,652 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 12 [2020-12-09 20:26:28,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 20:26:28,652 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-12-09 20:26:28,652 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 20:26:28,652 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-12-09 20:26:28,652 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-12-09 20:26:28,652 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-09 20:26:28,656 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 08:26:28 BoogieIcfgContainer [2020-12-09 20:26:28,656 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 20:26:28,657 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 20:26:28,657 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 20:26:28,657 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 20:26:28,658 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 08:26:27" (3/4) ... [2020-12-09 20:26:28,660 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-12-09 20:26:28,670 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 15 nodes and edges [2020-12-09 20:26:28,671 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2020-12-09 20:26:28,671 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-12-09 20:26:28,671 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-09 20:26:28,716 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_929da21f-c2f2-4267-a535-d5cc45e679db/bin/utaipan/witness.graphml [2020-12-09 20:26:28,717 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 20:26:28,718 INFO L168 Benchmark]: Toolchain (without parser) took 1366.15 ms. Allocated memory was 81.8 MB in the beginning and 98.6 MB in the end (delta: 16.8 MB). Free memory was 53.4 MB in the beginning and 57.6 MB in the end (delta: -4.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-12-09 20:26:28,718 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 81.8 MB. Free memory was 37.6 MB in the beginning and 37.6 MB in the end (delta: 63.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 20:26:28,719 INFO L168 Benchmark]: CACSL2BoogieTranslator took 188.55 ms. Allocated memory was 81.8 MB in the beginning and 98.6 MB in the end (delta: 16.8 MB). Free memory was 53.1 MB in the beginning and 73.9 MB in the end (delta: -20.8 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2020-12-09 20:26:28,719 INFO L168 Benchmark]: Boogie Procedure Inliner took 31.84 ms. Allocated memory is still 98.6 MB. Free memory was 73.9 MB in the beginning and 72.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 20:26:28,720 INFO L168 Benchmark]: Boogie Preprocessor took 24.07 ms. Allocated memory is still 98.6 MB. Free memory was 72.6 MB in the beginning and 71.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 20:26:28,720 INFO L168 Benchmark]: RCFGBuilder took 381.25 ms. Allocated memory is still 98.6 MB. Free memory was 71.2 MB in the beginning and 68.2 MB in the end (delta: 3.0 MB). Peak memory consumption was 22.8 MB. Max. memory is 16.1 GB. [2020-12-09 20:26:28,720 INFO L168 Benchmark]: TraceAbstraction took 675.33 ms. Allocated memory is still 98.6 MB. Free memory was 68.2 MB in the beginning and 61.1 MB in the end (delta: 7.1 MB). Peak memory consumption was 7.3 MB. Max. memory is 16.1 GB. [2020-12-09 20:26:28,721 INFO L168 Benchmark]: Witness Printer took 59.73 ms. Allocated memory is still 98.6 MB. Free memory was 61.1 MB in the beginning and 57.6 MB in the end (delta: 3.5 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-12-09 20:26:28,723 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 81.8 MB. Free memory was 37.6 MB in the beginning and 37.6 MB in the end (delta: 63.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 188.55 ms. Allocated memory was 81.8 MB in the beginning and 98.6 MB in the end (delta: 16.8 MB). Free memory was 53.1 MB in the beginning and 73.9 MB in the end (delta: -20.8 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 31.84 ms. Allocated memory is still 98.6 MB. Free memory was 73.9 MB in the beginning and 72.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 24.07 ms. Allocated memory is still 98.6 MB. Free memory was 72.6 MB in the beginning and 71.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 381.25 ms. Allocated memory is still 98.6 MB. Free memory was 71.2 MB in the beginning and 68.2 MB in the end (delta: 3.0 MB). Peak memory consumption was 22.8 MB. Max. memory is 16.1 GB. * TraceAbstraction took 675.33 ms. Allocated memory is still 98.6 MB. Free memory was 68.2 MB in the beginning and 61.1 MB in the end (delta: 7.1 MB). Peak memory consumption was 7.3 MB. Max. memory is 16.1 GB. * Witness Printer took 59.73 ms. Allocated memory is still 98.6 MB. Free memory was 61.1 MB in the beginning and 57.6 MB in the end (delta: 3.5 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 121]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 6]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 23 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 0.6s, OverallIterations: 9, TraceHistogramMax: 1, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 251 SDtfs, 183 SDslu, 257 SDs, 0 SdLazy, 63 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=23occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 9 MinimizatonAttempts, 66 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 72 NumberOfCodeBlocks, 72 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 63 ConstructedInterpolants, 0 QuantifiedInterpolants, 2157 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 9 InterpolantComputations, 9 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...