./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/locks/test_locks_6.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_ed4587bf-ab92-4afa-91e6-56742e38dd11/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_ed4587bf-ab92-4afa-91e6-56742e38dd11/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_ed4587bf-ab92-4afa-91e6-56742e38dd11/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_ed4587bf-ab92-4afa-91e6-56742e38dd11/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/locks/test_locks_6.c -s /tmp/vcloud-vcloud-master/worker/run_dir_ed4587bf-ab92-4afa-91e6-56742e38dd11/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_ed4587bf-ab92-4afa-91e6-56742e38dd11/bin/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 8a6bc1adbcafb13db44c5d4b4826990150e2f336 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-22 13:01:26,501 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-22 13:01:26,503 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-22 13:01:26,554 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-22 13:01:26,558 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-22 13:01:26,563 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-22 13:01:26,567 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-22 13:01:26,574 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-22 13:01:26,577 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-22 13:01:26,583 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-22 13:01:26,584 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-22 13:01:26,586 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-22 13:01:26,587 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-22 13:01:26,590 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-22 13:01:26,592 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-22 13:01:26,594 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-22 13:01:26,595 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-22 13:01:26,597 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-22 13:01:26,603 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-22 13:01:26,611 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-22 13:01:26,613 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-22 13:01:26,614 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-22 13:01:26,616 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-22 13:01:26,617 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-22 13:01:26,626 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-22 13:01:26,627 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-22 13:01:26,627 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-22 13:01:26,629 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-22 13:01:26,630 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-22 13:01:26,631 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-22 13:01:26,632 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-22 13:01:26,634 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-22 13:01:26,636 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-22 13:01:26,637 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-22 13:01:26,638 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-22 13:01:26,639 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-22 13:01:26,639 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-22 13:01:26,640 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-22 13:01:26,640 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-22 13:01:26,641 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-22 13:01:26,642 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-22 13:01:26,645 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_ed4587bf-ab92-4afa-91e6-56742e38dd11/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-11-22 13:01:26,687 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-22 13:01:26,688 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-22 13:01:26,689 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-22 13:01:26,690 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-22 13:01:26,690 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-22 13:01:26,691 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-22 13:01:26,691 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-22 13:01:26,691 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-22 13:01:26,692 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-22 13:01:26,692 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-22 13:01:26,693 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-22 13:01:26,694 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-22 13:01:26,694 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-22 13:01:26,694 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-22 13:01:26,694 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-22 13:01:26,695 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-22 13:01:26,696 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-22 13:01:26,696 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-22 13:01:26,696 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-22 13:01:26,697 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-22 13:01:26,697 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-22 13:01:26,697 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-22 13:01:26,697 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-22 13:01:26,698 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-22 13:01:26,698 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-22 13:01:26,698 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-22 13:01:26,699 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-22 13:01:26,699 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-22 13:01:26,699 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-22 13:01:26,701 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-22 13:01:26,701 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-22 13:01:26,702 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-22 13:01:26,702 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-22 13:01:26,703 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-22 13:01:26,703 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-22 13:01:26,703 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-22 13:01:26,703 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-22 13:01:26,704 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-22 13:01:26,704 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-22 13:01:26,704 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-22 13:01:26,705 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_ed4587bf-ab92-4afa-91e6-56742e38dd11/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_ed4587bf-ab92-4afa-91e6-56742e38dd11/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8a6bc1adbcafb13db44c5d4b4826990150e2f336 [2020-11-22 13:01:27,003 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-22 13:01:27,032 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-22 13:01:27,035 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-22 13:01:27,036 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-22 13:01:27,038 INFO L275 PluginConnector]: CDTParser initialized [2020-11-22 13:01:27,039 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_ed4587bf-ab92-4afa-91e6-56742e38dd11/bin/utaipan/../../sv-benchmarks/c/locks/test_locks_6.c [2020-11-22 13:01:27,104 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_ed4587bf-ab92-4afa-91e6-56742e38dd11/bin/utaipan/data/1d72c2cd4/516e03caf2214b0bbf65908b95c1274b/FLAG7ee0e1a4c [2020-11-22 13:01:27,655 INFO L306 CDTParser]: Found 1 translation units. [2020-11-22 13:01:27,656 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_ed4587bf-ab92-4afa-91e6-56742e38dd11/sv-benchmarks/c/locks/test_locks_6.c [2020-11-22 13:01:27,669 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_ed4587bf-ab92-4afa-91e6-56742e38dd11/bin/utaipan/data/1d72c2cd4/516e03caf2214b0bbf65908b95c1274b/FLAG7ee0e1a4c [2020-11-22 13:01:28,055 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_ed4587bf-ab92-4afa-91e6-56742e38dd11/bin/utaipan/data/1d72c2cd4/516e03caf2214b0bbf65908b95c1274b [2020-11-22 13:01:28,057 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-22 13:01:28,059 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-22 13:01:28,061 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-22 13:01:28,061 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-22 13:01:28,064 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-22 13:01:28,065 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:01:28" (1/1) ... [2020-11-22 13:01:28,067 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@49ce0946 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:01:28, skipping insertion in model container [2020-11-22 13:01:28,068 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:01:28" (1/1) ... [2020-11-22 13:01:28,075 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-22 13:01:28,092 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-22 13:01:28,325 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-22 13:01:28,350 INFO L203 MainTranslator]: Completed pre-run [2020-11-22 13:01:28,371 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-22 13:01:28,385 INFO L208 MainTranslator]: Completed translation [2020-11-22 13:01:28,385 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:01:28 WrapperNode [2020-11-22 13:01:28,386 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-22 13:01:28,387 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-22 13:01:28,387 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-22 13:01:28,387 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-22 13:01:28,395 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:01:28" (1/1) ... [2020-11-22 13:01:28,402 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:01:28" (1/1) ... [2020-11-22 13:01:28,421 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-22 13:01:28,422 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-22 13:01:28,423 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-22 13:01:28,423 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-22 13:01:28,432 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:01:28" (1/1) ... [2020-11-22 13:01:28,432 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:01:28" (1/1) ... [2020-11-22 13:01:28,442 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:01:28" (1/1) ... [2020-11-22 13:01:28,442 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:01:28" (1/1) ... [2020-11-22 13:01:28,446 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:01:28" (1/1) ... [2020-11-22 13:01:28,454 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:01:28" (1/1) ... [2020-11-22 13:01:28,455 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:01:28" (1/1) ... [2020-11-22 13:01:28,457 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-22 13:01:28,458 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-22 13:01:28,458 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-22 13:01:28,458 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-22 13:01:28,459 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:01:28" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ed4587bf-ab92-4afa-91e6-56742e38dd11/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 [2020-11-22 13:01:28,519 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-22 13:01:28,519 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-22 13:01:28,519 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-22 13:01:28,519 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-22 13:01:29,203 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-22 13:01:29,203 INFO L298 CfgBuilder]: Removed 7 assume(true) statements. [2020-11-22 13:01:29,205 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:01:29 BoogieIcfgContainer [2020-11-22 13:01:29,206 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-22 13:01:29,207 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-22 13:01:29,208 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-22 13:01:29,212 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-22 13:01:29,212 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 01:01:28" (1/3) ... [2020-11-22 13:01:29,214 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f6742fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:01:29, skipping insertion in model container [2020-11-22 13:01:29,214 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:01:28" (2/3) ... [2020-11-22 13:01:29,215 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f6742fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:01:29, skipping insertion in model container [2020-11-22 13:01:29,215 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:01:29" (3/3) ... [2020-11-22 13:01:29,216 INFO L111 eAbstractionObserver]: Analyzing ICFG test_locks_6.c [2020-11-22 13:01:29,228 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-22 13:01:29,233 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-22 13:01:29,246 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-22 13:01:29,288 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-22 13:01:29,289 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-22 13:01:29,289 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-22 13:01:29,289 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-22 13:01:29,289 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-22 13:01:29,289 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-22 13:01:29,290 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-22 13:01:29,290 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-22 13:01:29,306 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-11-22 13:01:29,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-11-22 13:01:29,310 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:01:29,311 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-11-22 13:01:29,311 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 13:01:29,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:01:29,316 INFO L82 PathProgramCache]: Analyzing trace with hash 357518160, now seen corresponding path program 1 times [2020-11-22 13:01:29,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:01:29,323 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468309677] [2020-11-22 13:01:29,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:01:29,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:01:29,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:01:29,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468309677] [2020-11-22 13:01:29,600 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:01:29,600 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-22 13:01:29,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634346842] [2020-11-22 13:01:29,605 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-22 13:01:29,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:01:29,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-22 13:01:29,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-22 13:01:29,619 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 4 states. [2020-11-22 13:01:29,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:01:29,669 INFO L93 Difference]: Finished difference Result 42 states and 65 transitions. [2020-11-22 13:01:29,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-22 13:01:29,670 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-11-22 13:01:29,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:01:29,692 INFO L225 Difference]: With dead ends: 42 [2020-11-22 13:01:29,693 INFO L226 Difference]: Without dead ends: 31 [2020-11-22 13:01:29,698 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 [2020-11-22 13:01:29,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-11-22 13:01:29,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 17. [2020-11-22 13:01:29,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-11-22 13:01:29,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 27 transitions. [2020-11-22 13:01:29,735 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 27 transitions. Word has length 6 [2020-11-22 13:01:29,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:01:29,735 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 27 transitions. [2020-11-22 13:01:29,735 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-22 13:01:29,735 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 27 transitions. [2020-11-22 13:01:29,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-11-22 13:01:29,736 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:01:29,736 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:01:29,736 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-22 13:01:29,737 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 13:01:29,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:01:29,738 INFO L82 PathProgramCache]: Analyzing trace with hash -1801624284, now seen corresponding path program 1 times [2020-11-22 13:01:29,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:01:29,738 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162684261] [2020-11-22 13:01:29,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:01:29,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:01:29,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:01:29,815 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162684261] [2020-11-22 13:01:29,815 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:01:29,815 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-22 13:01:29,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381736908] [2020-11-22 13:01:29,817 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-22 13:01:29,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:01:29,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-22 13:01:29,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-22 13:01:29,818 INFO L87 Difference]: Start difference. First operand 17 states and 27 transitions. Second operand 4 states. [2020-11-22 13:01:29,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:01:29,894 INFO L93 Difference]: Finished difference Result 31 states and 47 transitions. [2020-11-22 13:01:29,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-22 13:01:29,902 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2020-11-22 13:01:29,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:01:29,903 INFO L225 Difference]: With dead ends: 31 [2020-11-22 13:01:29,903 INFO L226 Difference]: Without dead ends: 29 [2020-11-22 13:01:29,904 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 [2020-11-22 13:01:29,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-11-22 13:01:29,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 17. [2020-11-22 13:01:29,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-11-22 13:01:29,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 26 transitions. [2020-11-22 13:01:29,908 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 26 transitions. Word has length 7 [2020-11-22 13:01:29,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:01:29,908 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 26 transitions. [2020-11-22 13:01:29,908 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-22 13:01:29,909 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 26 transitions. [2020-11-22 13:01:29,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-11-22 13:01:29,909 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:01:29,909 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:01:29,909 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-22 13:01:29,909 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 13:01:29,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:01:29,916 INFO L82 PathProgramCache]: Analyzing trace with hash -15562971, now seen corresponding path program 1 times [2020-11-22 13:01:29,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:01:29,916 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621156708] [2020-11-22 13:01:29,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:01:29,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:01:30,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:01:30,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621156708] [2020-11-22 13:01:30,025 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:01:30,025 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-22 13:01:30,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144522543] [2020-11-22 13:01:30,025 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-22 13:01:30,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:01:30,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-22 13:01:30,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-22 13:01:30,027 INFO L87 Difference]: Start difference. First operand 17 states and 26 transitions. Second operand 4 states. [2020-11-22 13:01:30,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:01:30,064 INFO L93 Difference]: Finished difference Result 29 states and 42 transitions. [2020-11-22 13:01:30,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-22 13:01:30,065 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2020-11-22 13:01:30,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:01:30,066 INFO L225 Difference]: With dead ends: 29 [2020-11-22 13:01:30,067 INFO L226 Difference]: Without dead ends: 27 [2020-11-22 13:01:30,067 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 [2020-11-22 13:01:30,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-11-22 13:01:30,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 17. [2020-11-22 13:01:30,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-11-22 13:01:30,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 25 transitions. [2020-11-22 13:01:30,071 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 25 transitions. Word has length 8 [2020-11-22 13:01:30,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:01:30,071 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 25 transitions. [2020-11-22 13:01:30,071 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-22 13:01:30,072 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 25 transitions. [2020-11-22 13:01:30,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-11-22 13:01:30,072 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:01:30,072 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:01:30,073 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-22 13:01:30,073 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 13:01:30,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:01:30,073 INFO L82 PathProgramCache]: Analyzing trace with hash -482236775, now seen corresponding path program 1 times [2020-11-22 13:01:30,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:01:30,077 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479157678] [2020-11-22 13:01:30,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:01:30,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:01:30,145 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:01:30,146 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479157678] [2020-11-22 13:01:30,146 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:01:30,146 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-22 13:01:30,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131078822] [2020-11-22 13:01:30,147 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-22 13:01:30,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:01:30,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-22 13:01:30,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-22 13:01:30,149 INFO L87 Difference]: Start difference. First operand 17 states and 25 transitions. Second operand 4 states. [2020-11-22 13:01:30,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:01:30,177 INFO L93 Difference]: Finished difference Result 27 states and 37 transitions. [2020-11-22 13:01:30,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-22 13:01:30,178 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2020-11-22 13:01:30,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:01:30,179 INFO L225 Difference]: With dead ends: 27 [2020-11-22 13:01:30,179 INFO L226 Difference]: Without dead ends: 25 [2020-11-22 13:01:30,179 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 [2020-11-22 13:01:30,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-11-22 13:01:30,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 17. [2020-11-22 13:01:30,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-11-22 13:01:30,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 24 transitions. [2020-11-22 13:01:30,183 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 24 transitions. Word has length 9 [2020-11-22 13:01:30,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:01:30,183 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 24 transitions. [2020-11-22 13:01:30,183 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-22 13:01:30,184 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 24 transitions. [2020-11-22 13:01:30,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-22 13:01:30,184 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:01:30,185 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:01:30,185 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-22 13:01:30,185 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 13:01:30,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:01:30,186 INFO L82 PathProgramCache]: Analyzing trace with hash -2064222470, now seen corresponding path program 1 times [2020-11-22 13:01:30,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:01:30,186 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300020149] [2020-11-22 13:01:30,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:01:30,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:01:30,250 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:01:30,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300020149] [2020-11-22 13:01:30,251 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:01:30,251 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-22 13:01:30,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565121151] [2020-11-22 13:01:30,252 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-22 13:01:30,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:01:30,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-22 13:01:30,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-22 13:01:30,253 INFO L87 Difference]: Start difference. First operand 17 states and 24 transitions. Second operand 4 states. [2020-11-22 13:01:30,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:01:30,294 INFO L93 Difference]: Finished difference Result 25 states and 32 transitions. [2020-11-22 13:01:30,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-22 13:01:30,296 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-11-22 13:01:30,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:01:30,297 INFO L225 Difference]: With dead ends: 25 [2020-11-22 13:01:30,297 INFO L226 Difference]: Without dead ends: 23 [2020-11-22 13:01:30,297 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 [2020-11-22 13:01:30,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-11-22 13:01:30,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 17. [2020-11-22 13:01:30,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-11-22 13:01:30,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 23 transitions. [2020-11-22 13:01:30,301 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 23 transitions. Word has length 10 [2020-11-22 13:01:30,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:01:30,301 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 23 transitions. [2020-11-22 13:01:30,301 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-22 13:01:30,302 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 23 transitions. [2020-11-22 13:01:30,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-22 13:01:30,306 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:01:30,307 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:01:30,307 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-22 13:01:30,307 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 13:01:30,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:01:30,309 INFO L82 PathProgramCache]: Analyzing trace with hash 433828878, now seen corresponding path program 1 times [2020-11-22 13:01:30,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:01:30,312 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816983208] [2020-11-22 13:01:30,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:01:30,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:01:30,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:01:30,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816983208] [2020-11-22 13:01:30,406 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:01:30,406 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-22 13:01:30,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33391871] [2020-11-22 13:01:30,407 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-22 13:01:30,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:01:30,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-22 13:01:30,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-22 13:01:30,408 INFO L87 Difference]: Start difference. First operand 17 states and 23 transitions. Second operand 4 states. [2020-11-22 13:01:30,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:01:30,435 INFO L93 Difference]: Finished difference Result 19 states and 25 transitions. [2020-11-22 13:01:30,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-22 13:01:30,436 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2020-11-22 13:01:30,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:01:30,436 INFO L225 Difference]: With dead ends: 19 [2020-11-22 13:01:30,437 INFO L226 Difference]: Without dead ends: 0 [2020-11-22 13:01:30,437 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 [2020-11-22 13:01:30,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-22 13:01:30,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-22 13:01:30,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-22 13:01:30,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-22 13:01:30,438 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 11 [2020-11-22 13:01:30,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:01:30,439 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-22 13:01:30,439 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-22 13:01:30,439 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-22 13:01:30,439 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-22 13:01:30,439 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-22 13:01:30,441 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-11-22 13:01:30,458 INFO L274 CegarLoopResult]: For program point L85(line 85) no Hoare annotation was computed. [2020-11-22 13:01:30,458 INFO L274 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-11-22 13:01:30,458 INFO L274 CegarLoopResult]: For program point L94-1(lines 29 104) no Hoare annotation was computed. [2020-11-22 13:01:30,459 INFO L274 CegarLoopResult]: For program point L95(line 95) no Hoare annotation was computed. [2020-11-22 13:01:30,459 INFO L274 CegarLoopResult]: For program point L79-1(lines 29 104) no Hoare annotation was computed. [2020-11-22 13:01:30,459 INFO L274 CegarLoopResult]: For program point L80(line 80) no Hoare annotation was computed. [2020-11-22 13:01:30,459 INFO L277 CegarLoopResult]: At program point L105(lines 7 109) the Hoare annotation is: true [2020-11-22 13:01:30,459 INFO L274 CegarLoopResult]: For program point L31(lines 31 33) no Hoare annotation was computed. [2020-11-22 13:01:30,460 INFO L274 CegarLoopResult]: For program point L89-1(lines 29 104) no Hoare annotation was computed. [2020-11-22 13:01:30,460 INFO L274 CegarLoopResult]: For program point L90(line 90) no Hoare annotation was computed. [2020-11-22 13:01:30,460 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 3) no Hoare annotation was computed. [2020-11-22 13:01:30,460 INFO L274 CegarLoopResult]: For program point L74-1(lines 29 104) no Hoare annotation was computed. [2020-11-22 13:01:30,460 INFO L277 CegarLoopResult]: At program point L99-1(lines 29 104) the Hoare annotation is: true [2020-11-22 13:01:30,460 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-11-22 13:01:30,461 INFO L277 CegarLoopResult]: At program point L108(lines 6 109) the Hoare annotation is: true [2020-11-22 13:01:30,461 INFO L274 CegarLoopResult]: For program point L75(line 75) no Hoare annotation was computed. [2020-11-22 13:01:30,461 INFO L274 CegarLoopResult]: For program point L100(line 100) no Hoare annotation was computed. [2020-11-22 13:01:30,461 INFO L270 CegarLoopResult]: At program point L100-1(lines 7 109) the Hoare annotation is: false [2020-11-22 13:01:30,461 INFO L274 CegarLoopResult]: For program point L84-1(lines 29 104) no Hoare annotation was computed. [2020-11-22 13:01:30,461 INFO L274 CegarLoopResult]: For program point L68-1(lines 29 104) no Hoare annotation was computed. [2020-11-22 13:01:30,472 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.11 01:01:30 BoogieIcfgContainer [2020-11-22 13:01:30,472 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-22 13:01:30,473 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-22 13:01:30,473 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-22 13:01:30,473 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-22 13:01:30,474 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:01:29" (3/4) ... [2020-11-22 13:01:30,477 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-22 13:01:30,490 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 13 nodes and edges [2020-11-22 13:01:30,490 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2020-11-22 13:01:30,491 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2020-11-22 13:01:30,491 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-22 13:01:30,549 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_ed4587bf-ab92-4afa-91e6-56742e38dd11/bin/utaipan/witness.graphml [2020-11-22 13:01:30,557 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-22 13:01:30,559 INFO L168 Benchmark]: Toolchain (without parser) took 2499.33 ms. Allocated memory is still 125.8 MB. Free memory was 94.2 MB in the beginning and 52.2 MB in the end (delta: 42.0 MB). Peak memory consumption was 39.0 MB. Max. memory is 16.1 GB. [2020-11-22 13:01:30,561 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 86.0 MB. Free memory was 43.4 MB in the beginning and 43.3 MB in the end (delta: 38.5 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-22 13:01:30,561 INFO L168 Benchmark]: CACSL2BoogieTranslator took 325.33 ms. Allocated memory is still 125.8 MB. Free memory was 94.2 MB in the beginning and 101.2 MB in the end (delta: -7.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-22 13:01:30,562 INFO L168 Benchmark]: Boogie Procedure Inliner took 34.75 ms. Allocated memory is still 125.8 MB. Free memory was 101.2 MB in the beginning and 99.7 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-22 13:01:30,563 INFO L168 Benchmark]: Boogie Preprocessor took 34.76 ms. Allocated memory is still 125.8 MB. Free memory was 99.7 MB in the beginning and 98.7 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-22 13:01:30,572 INFO L168 Benchmark]: RCFGBuilder took 748.09 ms. Allocated memory is still 125.8 MB. Free memory was 98.7 MB in the beginning and 72.2 MB in the end (delta: 26.5 MB). Peak memory consumption was 29.4 MB. Max. memory is 16.1 GB. [2020-11-22 13:01:30,573 INFO L168 Benchmark]: TraceAbstraction took 1264.97 ms. Allocated memory is still 125.8 MB. Free memory was 71.5 MB in the beginning and 55.2 MB in the end (delta: 16.3 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. [2020-11-22 13:01:30,573 INFO L168 Benchmark]: Witness Printer took 84.31 ms. Allocated memory is still 125.8 MB. Free memory was 55.2 MB in the beginning and 52.2 MB in the end (delta: 3.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-22 13:01:30,576 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 86.0 MB. Free memory was 43.4 MB in the beginning and 43.3 MB in the end (delta: 38.5 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 325.33 ms. Allocated memory is still 125.8 MB. Free memory was 94.2 MB in the beginning and 101.2 MB in the end (delta: -7.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 34.75 ms. Allocated memory is still 125.8 MB. Free memory was 101.2 MB in the beginning and 99.7 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 34.76 ms. Allocated memory is still 125.8 MB. Free memory was 99.7 MB in the beginning and 98.7 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 748.09 ms. Allocated memory is still 125.8 MB. Free memory was 98.7 MB in the beginning and 72.2 MB in the end (delta: 26.5 MB). Peak memory consumption was 29.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1264.97 ms. Allocated memory is still 125.8 MB. Free memory was 71.5 MB in the beginning and 55.2 MB in the end (delta: 16.3 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. * Witness Printer took 84.31 ms. Allocated memory is still 125.8 MB. Free memory was 55.2 MB in the beginning and 52.2 MB in the end (delta: 3.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 3]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 6]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 29]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 7]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 7]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1.1s, OverallIterations: 6, TraceHistogramMax: 1, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 140 SDtfs, 116 SDslu, 193 SDs, 0 SdLazy, 54 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=20occurred 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, 6 MinimizatonAttempts, 50 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 4 LocationsWithAnnotation, 4 PreInvPairs, 9 NumberOfFragments, 4 HoareAnnotationTreeSize, 4 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 4 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 51 NumberOfCodeBlocks, 51 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 45 ConstructedInterpolants, 0 QuantifiedInterpolants, 1495 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 6 InterpolantComputations, 6 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...