./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread-ext/23_lu-fig2.fixed.i --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_23843d54-92e8-4f67-ab82-4d5804013c87/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_23843d54-92e8-4f67-ab82-4d5804013c87/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_23843d54-92e8-4f67-ab82-4d5804013c87/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_23843d54-92e8-4f67-ab82-4d5804013c87/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/pthread-ext/23_lu-fig2.fixed.i -s /tmp/vcloud-vcloud-master/worker/run_dir_23843d54-92e8-4f67-ab82-4d5804013c87/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_23843d54-92e8-4f67-ab82-4d5804013c87/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 62fd7ea4bef52a1e791bedc427ce7156627e7f58 .................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-30 01:54:30,497 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-30 01:54:30,511 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-30 01:54:30,570 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-30 01:54:30,571 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-30 01:54:30,572 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-30 01:54:30,574 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-30 01:54:30,577 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-30 01:54:30,579 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-30 01:54:30,581 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-30 01:54:30,582 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-30 01:54:30,583 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-30 01:54:30,584 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-30 01:54:30,586 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-30 01:54:30,587 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-30 01:54:30,589 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-30 01:54:30,590 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-30 01:54:30,591 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-30 01:54:30,593 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-30 01:54:30,596 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-30 01:54:30,598 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-30 01:54:30,600 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-30 01:54:30,602 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-30 01:54:30,603 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-30 01:54:30,606 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-30 01:54:30,607 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-30 01:54:30,607 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-30 01:54:30,609 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-30 01:54:30,610 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-30 01:54:30,611 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-30 01:54:30,612 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-30 01:54:30,613 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-30 01:54:30,614 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-30 01:54:30,615 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-30 01:54:30,616 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-30 01:54:30,617 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-30 01:54:30,618 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-30 01:54:30,618 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-30 01:54:30,619 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-30 01:54:30,620 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-30 01:54:30,621 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-30 01:54:30,623 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_23843d54-92e8-4f67-ab82-4d5804013c87/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-11-30 01:54:30,647 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-30 01:54:30,648 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-30 01:54:30,649 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-30 01:54:30,649 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-30 01:54:30,649 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-30 01:54:30,650 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-30 01:54:30,650 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-30 01:54:30,650 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-30 01:54:30,651 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-30 01:54:30,651 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-30 01:54:30,651 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-30 01:54:30,652 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-30 01:54:30,652 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-30 01:54:30,652 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-30 01:54:30,653 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-30 01:54:30,653 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-30 01:54:30,654 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-30 01:54:30,654 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-30 01:54:30,654 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-30 01:54:30,654 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-30 01:54:30,655 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-30 01:54:30,655 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-30 01:54:30,655 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-30 01:54:30,656 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-30 01:54:30,656 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-30 01:54:30,656 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-30 01:54:30,656 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-30 01:54:30,657 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-30 01:54:30,657 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-30 01:54:30,657 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-30 01:54:30,658 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-30 01:54:30,658 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-30 01:54:30,658 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-30 01:54:30,659 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-30 01:54:30,659 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-30 01:54:30,659 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-30 01:54:30,659 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-30 01:54:30,660 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-30 01:54:30,660 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-30 01:54:30,660 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-30 01:54:30,660 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_23843d54-92e8-4f67-ab82-4d5804013c87/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_23843d54-92e8-4f67-ab82-4d5804013c87/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 62fd7ea4bef52a1e791bedc427ce7156627e7f58 [2020-11-30 01:54:30,979 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-30 01:54:31,004 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-30 01:54:31,008 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-30 01:54:31,010 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-30 01:54:31,010 INFO L275 PluginConnector]: CDTParser initialized [2020-11-30 01:54:31,011 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_23843d54-92e8-4f67-ab82-4d5804013c87/bin/utaipan/../../sv-benchmarks/c/pthread-ext/23_lu-fig2.fixed.i [2020-11-30 01:54:31,080 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_23843d54-92e8-4f67-ab82-4d5804013c87/bin/utaipan/data/8bb6e39a7/1aa491cd7b9f4f62a56c9e8e7392ca38/FLAG799cbc188 [2020-11-30 01:54:31,628 INFO L306 CDTParser]: Found 1 translation units. [2020-11-30 01:54:31,629 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_23843d54-92e8-4f67-ab82-4d5804013c87/sv-benchmarks/c/pthread-ext/23_lu-fig2.fixed.i [2020-11-30 01:54:31,646 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_23843d54-92e8-4f67-ab82-4d5804013c87/bin/utaipan/data/8bb6e39a7/1aa491cd7b9f4f62a56c9e8e7392ca38/FLAG799cbc188 [2020-11-30 01:54:31,937 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_23843d54-92e8-4f67-ab82-4d5804013c87/bin/utaipan/data/8bb6e39a7/1aa491cd7b9f4f62a56c9e8e7392ca38 [2020-11-30 01:54:31,939 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-30 01:54:31,941 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-30 01:54:31,943 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-30 01:54:31,943 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-30 01:54:31,946 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-30 01:54:31,947 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 01:54:31" (1/1) ... [2020-11-30 01:54:31,949 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@77768e49 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:54:31, skipping insertion in model container [2020-11-30 01:54:31,950 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 01:54:31" (1/1) ... [2020-11-30 01:54:31,957 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-30 01:54:31,996 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-30 01:54:32,357 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 01:54:32,365 INFO L203 MainTranslator]: Completed pre-run [2020-11-30 01:54:32,406 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 01:54:32,480 INFO L208 MainTranslator]: Completed translation [2020-11-30 01:54:32,481 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:54:32 WrapperNode [2020-11-30 01:54:32,481 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-30 01:54:32,482 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-30 01:54:32,482 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-30 01:54:32,483 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-30 01:54:32,490 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:54:32" (1/1) ... [2020-11-30 01:54:32,504 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:54:32" (1/1) ... [2020-11-30 01:54:32,526 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-30 01:54:32,526 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-30 01:54:32,527 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-30 01:54:32,527 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-30 01:54:32,535 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:54:32" (1/1) ... [2020-11-30 01:54:32,535 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:54:32" (1/1) ... [2020-11-30 01:54:32,538 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:54:32" (1/1) ... [2020-11-30 01:54:32,539 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:54:32" (1/1) ... [2020-11-30 01:54:32,544 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:54:32" (1/1) ... [2020-11-30 01:54:32,548 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:54:32" (1/1) ... [2020-11-30 01:54:32,550 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:54:32" (1/1) ... [2020-11-30 01:54:32,554 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-30 01:54:32,555 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-30 01:54:32,555 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-30 01:54:32,555 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-30 01:54:32,556 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:54:32" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_23843d54-92e8-4f67-ab82-4d5804013c87/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 [2020-11-30 01:54:32,634 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2020-11-30 01:54:32,634 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2020-11-30 01:54:32,634 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-30 01:54:32,634 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-30 01:54:32,635 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-30 01:54:32,635 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-30 01:54:32,635 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-30 01:54:32,635 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-30 01:54:32,637 WARN L208 CfgBuilder]: User set CodeBlockSize to LoopFreeBlock but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-11-30 01:54:33,419 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-30 01:54:33,419 INFO L298 CfgBuilder]: Removed 7 assume(true) statements. [2020-11-30 01:54:33,421 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 01:54:33 BoogieIcfgContainer [2020-11-30 01:54:33,421 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-30 01:54:33,426 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-30 01:54:33,427 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-30 01:54:33,431 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-30 01:54:33,431 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.11 01:54:31" (1/3) ... [2020-11-30 01:54:33,432 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75a2fbe1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 01:54:33, skipping insertion in model container [2020-11-30 01:54:33,432 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:54:32" (2/3) ... [2020-11-30 01:54:33,433 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75a2fbe1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 01:54:33, skipping insertion in model container [2020-11-30 01:54:33,433 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 01:54:33" (3/3) ... [2020-11-30 01:54:33,435 INFO L111 eAbstractionObserver]: Analyzing ICFG 23_lu-fig2.fixed.i [2020-11-30 01:54:33,453 WARN L153 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-11-30 01:54:33,453 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-30 01:54:33,458 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-11-30 01:54:33,460 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-11-30 01:54:33,490 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-30 01:54:33,490 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-30 01:54:33,491 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-30 01:54:33,491 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-30 01:54:33,491 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~PR_CreateThread__RES~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-30 01:54:33,491 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-30 01:54:33,492 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-30 01:54:33,494 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~PR_CreateThread__RES~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-30 01:54:33,495 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_reach_error_#t~nondet2.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-30 01:54:33,495 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0___VERIFIER_atomic_thr1_#in~PR_CreateThread__RES| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-30 01:54:33,495 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_reach_error_#t~nondet2.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-30 01:54:33,495 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0___VERIFIER_atomic_thr1_~PR_CreateThread__RES not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-30 01:54:33,496 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~PR_CreateThread__RES~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-30 01:54:33,496 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_reach_error_#t~nondet2.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-30 01:54:33,497 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_reach_error_#t~nondet2.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-30 01:54:33,497 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_reach_error_#t~nondet2.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-30 01:54:33,497 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0___VERIFIER_atomic_thr1_#in~PR_CreateThread__RES| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-30 01:54:33,499 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0___VERIFIER_atomic_thr1_~PR_CreateThread__RES not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-30 01:54:33,500 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_reach_error_#t~nondet2.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-30 01:54:33,500 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-30 01:54:33,501 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-30 01:54:33,502 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-30 01:54:33,503 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-30 01:54:33,506 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-30 01:54:33,506 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-30 01:54:33,507 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-30 01:54:33,507 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-30 01:54:33,507 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_reach_error_#t~nondet2.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-30 01:54:33,508 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-30 01:54:33,509 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0___VERIFIER_atomic_thr1_#in~PR_CreateThread__RES| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-30 01:54:33,510 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~PR_CreateThread__RES~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-30 01:54:33,510 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-30 01:54:33,511 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0___VERIFIER_atomic_thr1_~PR_CreateThread__RES not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-30 01:54:33,511 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_reach_error_#t~nondet2.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-30 01:54:33,517 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2020-11-30 01:54:33,531 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2020-11-30 01:54:33,569 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-30 01:54:33,569 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-30 01:54:33,569 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-30 01:54:33,570 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-30 01:54:33,570 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-30 01:54:33,570 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-30 01:54:33,570 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-30 01:54:33,570 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-30 01:54:33,583 INFO L129 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-11-30 01:54:33,585 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 49 places, 47 transitions, 99 flow [2020-11-30 01:54:33,588 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 49 places, 47 transitions, 99 flow [2020-11-30 01:54:33,590 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 49 places, 47 transitions, 99 flow [2020-11-30 01:54:33,623 INFO L129 PetriNetUnfolder]: 2/46 cut-off events. [2020-11-30 01:54:33,624 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-11-30 01:54:33,627 INFO L80 FinitePrefix]: Finished finitePrefix Result has 50 conditions, 46 events. 2/46 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 20 event pairs, 0 based on Foata normal form. 0/42 useless extension candidates. Maximal degree in co-relation 30. Up to 2 conditions per place. [2020-11-30 01:54:33,629 INFO L116 LiptonReduction]: Number of co-enabled transitions 378 [2020-11-30 01:54:35,112 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 48 [2020-11-30 01:54:35,458 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 68 [2020-11-30 01:54:35,565 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-11-30 01:54:35,596 INFO L131 LiptonReduction]: Checked pairs total: 879 [2020-11-30 01:54:35,597 INFO L133 LiptonReduction]: Total number of compositions: 36 [2020-11-30 01:54:35,603 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 17 places, 14 transitions, 33 flow [2020-11-30 01:54:35,612 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 38 states. [2020-11-30 01:54:35,614 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states. [2020-11-30 01:54:35,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-11-30 01:54:35,619 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:54:35,620 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-11-30 01:54:35,620 INFO L429 AbstractCegarLoop]: === Iteration 1 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:54:35,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:54:35,627 INFO L82 PathProgramCache]: Analyzing trace with hash 11878376, now seen corresponding path program 1 times [2020-11-30 01:54:35,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 01:54:35,637 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492898436] [2020-11-30 01:54:35,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:54:35,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:54:35,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:54:35,858 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492898436] [2020-11-30 01:54:35,859 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 01:54:35,859 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-11-30 01:54:35,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146501747] [2020-11-30 01:54:35,865 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-30 01:54:35,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 01:54:35,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-30 01:54:35,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 01:54:35,892 INFO L87 Difference]: Start difference. First operand 38 states. Second operand 3 states. [2020-11-30 01:54:35,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:54:35,931 INFO L93 Difference]: Finished difference Result 29 states and 50 transitions. [2020-11-30 01:54:35,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-30 01:54:35,933 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-11-30 01:54:35,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:54:35,942 INFO L225 Difference]: With dead ends: 29 [2020-11-30 01:54:35,943 INFO L226 Difference]: Without dead ends: 22 [2020-11-30 01:54:35,945 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 [2020-11-30 01:54:35,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-11-30 01:54:35,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-11-30 01:54:35,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-11-30 01:54:35,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 38 transitions. [2020-11-30 01:54:35,984 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 38 transitions. Word has length 4 [2020-11-30 01:54:35,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:54:35,985 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 38 transitions. [2020-11-30 01:54:35,985 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-30 01:54:35,985 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 38 transitions. [2020-11-30 01:54:35,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-11-30 01:54:35,986 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:54:35,986 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-11-30 01:54:36,011 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-30 01:54:36,012 INFO L429 AbstractCegarLoop]: === Iteration 2 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:54:36,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:54:36,012 INFO L82 PathProgramCache]: Analyzing trace with hash 368238171, now seen corresponding path program 1 times [2020-11-30 01:54:36,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 01:54:36,013 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671653110] [2020-11-30 01:54:36,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:54:36,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:54:36,091 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:54:36,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671653110] [2020-11-30 01:54:36,091 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 01:54:36,092 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-30 01:54:36,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245437027] [2020-11-30 01:54:36,093 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-30 01:54:36,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 01:54:36,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-30 01:54:36,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 01:54:36,094 INFO L87 Difference]: Start difference. First operand 22 states and 38 transitions. Second operand 3 states. [2020-11-30 01:54:36,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:54:36,106 INFO L93 Difference]: Finished difference Result 21 states and 35 transitions. [2020-11-30 01:54:36,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-30 01:54:36,107 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2020-11-30 01:54:36,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:54:36,108 INFO L225 Difference]: With dead ends: 21 [2020-11-30 01:54:36,108 INFO L226 Difference]: Without dead ends: 18 [2020-11-30 01:54:36,109 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 01:54:36,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-11-30 01:54:36,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-11-30 01:54:36,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-11-30 01:54:36,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 27 transitions. [2020-11-30 01:54:36,116 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 27 transitions. Word has length 5 [2020-11-30 01:54:36,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:54:36,116 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 27 transitions. [2020-11-30 01:54:36,117 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-30 01:54:36,117 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 27 transitions. [2020-11-30 01:54:36,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-11-30 01:54:36,117 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:54:36,117 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:54:36,118 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-30 01:54:36,118 INFO L429 AbstractCegarLoop]: === Iteration 3 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:54:36,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:54:36,118 INFO L82 PathProgramCache]: Analyzing trace with hash 1689707517, now seen corresponding path program 1 times [2020-11-30 01:54:36,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 01:54:36,119 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792462035] [2020-11-30 01:54:36,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:54:36,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:54:36,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:54:36,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792462035] [2020-11-30 01:54:36,204 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 01:54:36,204 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-30 01:54:36,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88172446] [2020-11-30 01:54:36,205 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-30 01:54:36,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 01:54:36,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-30 01:54:36,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 01:54:36,206 INFO L87 Difference]: Start difference. First operand 18 states and 27 transitions. Second operand 3 states. [2020-11-30 01:54:36,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:54:36,224 INFO L93 Difference]: Finished difference Result 14 states and 19 transitions. [2020-11-30 01:54:36,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-30 01:54:36,226 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2020-11-30 01:54:36,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:54:36,226 INFO L225 Difference]: With dead ends: 14 [2020-11-30 01:54:36,227 INFO L226 Difference]: Without dead ends: 14 [2020-11-30 01:54:36,227 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 01:54:36,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-11-30 01:54:36,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-11-30 01:54:36,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-11-30 01:54:36,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 19 transitions. [2020-11-30 01:54:36,230 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 19 transitions. Word has length 7 [2020-11-30 01:54:36,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:54:36,230 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 19 transitions. [2020-11-30 01:54:36,230 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-30 01:54:36,230 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 19 transitions. [2020-11-30 01:54:36,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-11-30 01:54:36,231 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:54:36,231 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:54:36,231 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-30 01:54:36,231 INFO L429 AbstractCegarLoop]: === Iteration 4 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:54:36,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:54:36,232 INFO L82 PathProgramCache]: Analyzing trace with hash 310628894, now seen corresponding path program 1 times [2020-11-30 01:54:36,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 01:54:36,232 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593088661] [2020-11-30 01:54:36,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:54:36,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:54:36,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:54:36,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593088661] [2020-11-30 01:54:36,321 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 01:54:36,321 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-30 01:54:36,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574128360] [2020-11-30 01:54:36,321 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-30 01:54:36,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 01:54:36,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-30 01:54:36,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-30 01:54:36,322 INFO L87 Difference]: Start difference. First operand 14 states and 19 transitions. Second operand 4 states. [2020-11-30 01:54:36,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:54:36,330 INFO L93 Difference]: Finished difference Result 13 states and 18 transitions. [2020-11-30 01:54:36,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-30 01:54:36,330 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2020-11-30 01:54:36,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:54:36,331 INFO L225 Difference]: With dead ends: 13 [2020-11-30 01:54:36,331 INFO L226 Difference]: Without dead ends: 0 [2020-11-30 01:54:36,331 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-30 01:54:36,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-30 01:54:36,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-30 01:54:36,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-30 01:54:36,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-30 01:54:36,332 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 9 [2020-11-30 01:54:36,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:54:36,332 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-30 01:54:36,332 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-30 01:54:36,332 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-30 01:54:36,333 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-30 01:54:36,333 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-30 01:54:36,335 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.11 01:54:36 BasicIcfg [2020-11-30 01:54:36,336 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-30 01:54:36,337 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-30 01:54:36,337 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-30 01:54:36,337 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-30 01:54:36,338 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 01:54:33" (3/4) ... [2020-11-30 01:54:36,341 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-30 01:54:36,348 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure thr1 [2020-11-30 01:54:36,355 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 48 nodes and edges [2020-11-30 01:54:36,355 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 13 nodes and edges [2020-11-30 01:54:36,356 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2020-11-30 01:54:36,356 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-30 01:54:36,427 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_23843d54-92e8-4f67-ab82-4d5804013c87/bin/utaipan/witness.graphml [2020-11-30 01:54:36,427 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-30 01:54:36,429 INFO L168 Benchmark]: Toolchain (without parser) took 4486.75 ms. Allocated memory was 107.0 MB in the beginning and 134.2 MB in the end (delta: 27.3 MB). Free memory was 69.8 MB in the beginning and 86.6 MB in the end (delta: -16.8 MB). Peak memory consumption was 8.5 MB. Max. memory is 16.1 GB. [2020-11-30 01:54:36,432 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 107.0 MB. Free memory is still 87.4 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 01:54:36,434 INFO L168 Benchmark]: CACSL2BoogieTranslator took 538.65 ms. Allocated memory is still 107.0 MB. Free memory was 69.7 MB in the beginning and 64.1 MB in the end (delta: 5.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-30 01:54:36,435 INFO L168 Benchmark]: Boogie Procedure Inliner took 43.70 ms. Allocated memory is still 107.0 MB. Free memory was 64.1 MB in the beginning and 62.0 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-30 01:54:36,435 INFO L168 Benchmark]: Boogie Preprocessor took 27.59 ms. Allocated memory is still 107.0 MB. Free memory was 62.0 MB in the beginning and 60.8 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-30 01:54:36,435 INFO L168 Benchmark]: RCFGBuilder took 866.80 ms. Allocated memory is still 107.0 MB. Free memory was 60.8 MB in the beginning and 53.6 MB in the end (delta: 7.2 MB). Peak memory consumption was 20.9 MB. Max. memory is 16.1 GB. [2020-11-30 01:54:36,436 INFO L168 Benchmark]: TraceAbstraction took 2910.74 ms. Allocated memory was 107.0 MB in the beginning and 134.2 MB in the end (delta: 27.3 MB). Free memory was 53.4 MB in the beginning and 89.7 MB in the end (delta: -36.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 01:54:36,436 INFO L168 Benchmark]: Witness Printer took 90.07 ms. Allocated memory is still 134.2 MB. Free memory was 89.7 MB in the beginning and 86.6 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-30 01:54:36,438 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 107.0 MB. Free memory is still 87.4 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 538.65 ms. Allocated memory is still 107.0 MB. Free memory was 69.7 MB in the beginning and 64.1 MB in the end (delta: 5.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 43.70 ms. Allocated memory is still 107.0 MB. Free memory was 64.1 MB in the beginning and 62.0 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 27.59 ms. Allocated memory is still 107.0 MB. Free memory was 62.0 MB in the beginning and 60.8 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 866.80 ms. Allocated memory is still 107.0 MB. Free memory was 60.8 MB in the beginning and 53.6 MB in the end (delta: 7.2 MB). Peak memory consumption was 20.9 MB. Max. memory is 16.1 GB. * TraceAbstraction took 2910.74 ms. Allocated memory was 107.0 MB in the beginning and 134.2 MB in the end (delta: 27.3 MB). Free memory was 53.4 MB in the beginning and 89.7 MB in the end (delta: -36.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 90.07 ms. Allocated memory is still 134.2 MB. Free memory was 89.7 MB in the beginning and 86.6 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks 254 VarBasedMoverChecksPositive, 32 VarBasedMoverChecksNegative, 12 SemBasedMoverChecksPositive, 20 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.3s, 41 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 2.0s, 49 PlacesBefore, 17 PlacesAfterwards, 47 TransitionsBefore, 14 TransitionsAfterwards, 378 CoEnabledTransitionPairs, 5 FixpointIterations, 14 TrivialSequentialCompositions, 19 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 2 ConcurrentYvCompositions, 1 ChoiceCompositions, 36 TotalNumberOfCompositions, 879 MoverChecksTotal - PositiveResult [Line: 16]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 16]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 46 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 2.7s, OverallIterations: 4, TraceHistogramMax: 1, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.0s, HoareTripleCheckerStatistics: 40 SDtfs, 15 SDslu, 20 SDs, 0 SdLazy, 16 SolverSat, 3 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=38occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 25 NumberOfCodeBlocks, 25 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 21 ConstructedInterpolants, 0 QuantifiedInterpolants, 415 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 4 InterpolantComputations, 4 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...