./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread/triangular-2.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_1ca8fa43-8532-45d3-8274-5b21644e342d/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_1ca8fa43-8532-45d3-8274-5b21644e342d/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_1ca8fa43-8532-45d3-8274-5b21644e342d/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_1ca8fa43-8532-45d3-8274-5b21644e342d/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/pthread/triangular-2.i -s /tmp/vcloud-vcloud-master/worker/run_dir_1ca8fa43-8532-45d3-8274-5b21644e342d/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_1ca8fa43-8532-45d3-8274-5b21644e342d/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 39211c46f4aae13996ba33c19e2c7157964c8aaa ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-28 07:36:11,285 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-28 07:36:11,287 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-28 07:36:11,364 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-28 07:36:11,366 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-28 07:36:11,371 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-28 07:36:11,375 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-28 07:36:11,382 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-28 07:36:11,385 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-28 07:36:11,393 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-28 07:36:11,394 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-28 07:36:11,397 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-28 07:36:11,398 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-28 07:36:11,402 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-28 07:36:11,404 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-28 07:36:11,406 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-28 07:36:11,408 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-28 07:36:11,410 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-28 07:36:11,417 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-28 07:36:11,427 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-28 07:36:11,431 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-28 07:36:11,433 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-28 07:36:11,436 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-28 07:36:11,437 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-28 07:36:11,448 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-28 07:36:11,449 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-28 07:36:11,450 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-28 07:36:11,452 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-28 07:36:11,453 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-28 07:36:11,454 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-28 07:36:11,455 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-28 07:36:11,456 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-28 07:36:11,459 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-28 07:36:11,460 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-28 07:36:11,462 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-28 07:36:11,462 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-28 07:36:11,464 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-28 07:36:11,464 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-28 07:36:11,464 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-28 07:36:11,466 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-28 07:36:11,467 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-28 07:36:11,470 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_1ca8fa43-8532-45d3-8274-5b21644e342d/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-11-28 07:36:11,522 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-28 07:36:11,523 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-28 07:36:11,524 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-28 07:36:11,525 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-28 07:36:11,525 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-28 07:36:11,525 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-28 07:36:11,525 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-28 07:36:11,526 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-28 07:36:11,526 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-28 07:36:11,526 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-28 07:36:11,527 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-28 07:36:11,528 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-28 07:36:11,528 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-28 07:36:11,528 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-28 07:36:11,529 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-28 07:36:11,529 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-28 07:36:11,530 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-28 07:36:11,530 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-28 07:36:11,530 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-28 07:36:11,530 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-28 07:36:11,531 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-28 07:36:11,531 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-28 07:36:11,531 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-28 07:36:11,531 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-28 07:36:11,532 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-28 07:36:11,532 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-28 07:36:11,532 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-28 07:36:11,532 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-28 07:36:11,533 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-28 07:36:11,533 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-28 07:36:11,533 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-28 07:36:11,533 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 07:36:11,534 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-28 07:36:11,534 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-28 07:36:11,534 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-28 07:36:11,535 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-28 07:36:11,535 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-28 07:36:11,535 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-28 07:36:11,535 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-28 07:36:11,536 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-28 07:36:11,536 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_1ca8fa43-8532-45d3-8274-5b21644e342d/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_1ca8fa43-8532-45d3-8274-5b21644e342d/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 39211c46f4aae13996ba33c19e2c7157964c8aaa [2020-11-28 07:36:11,850 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-28 07:36:11,881 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-28 07:36:11,884 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-28 07:36:11,885 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-28 07:36:11,886 INFO L275 PluginConnector]: CDTParser initialized [2020-11-28 07:36:11,887 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_1ca8fa43-8532-45d3-8274-5b21644e342d/bin/utaipan/../../sv-benchmarks/c/pthread/triangular-2.i [2020-11-28 07:36:11,966 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_1ca8fa43-8532-45d3-8274-5b21644e342d/bin/utaipan/data/5922cd5dd/a95319d3c7384892b013945b717a1913/FLAG65bfd26b9 [2020-11-28 07:36:12,710 INFO L306 CDTParser]: Found 1 translation units. [2020-11-28 07:36:12,711 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_1ca8fa43-8532-45d3-8274-5b21644e342d/sv-benchmarks/c/pthread/triangular-2.i [2020-11-28 07:36:12,744 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_1ca8fa43-8532-45d3-8274-5b21644e342d/bin/utaipan/data/5922cd5dd/a95319d3c7384892b013945b717a1913/FLAG65bfd26b9 [2020-11-28 07:36:12,932 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_1ca8fa43-8532-45d3-8274-5b21644e342d/bin/utaipan/data/5922cd5dd/a95319d3c7384892b013945b717a1913 [2020-11-28 07:36:12,935 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-28 07:36:12,937 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-28 07:36:12,939 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-28 07:36:12,939 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-28 07:36:12,943 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-28 07:36:12,944 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 07:36:12" (1/1) ... [2020-11-28 07:36:12,958 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@719012be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:36:12, skipping insertion in model container [2020-11-28 07:36:12,958 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 07:36:12" (1/1) ... [2020-11-28 07:36:12,966 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-28 07:36:13,028 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-28 07:36:13,515 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 07:36:13,525 INFO L203 MainTranslator]: Completed pre-run [2020-11-28 07:36:13,601 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 07:36:13,697 INFO L208 MainTranslator]: Completed translation [2020-11-28 07:36:13,699 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:36:13 WrapperNode [2020-11-28 07:36:13,699 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-28 07:36:13,700 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-28 07:36:13,700 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-28 07:36:13,700 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-28 07:36:13,708 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:36:13" (1/1) ... [2020-11-28 07:36:13,727 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:36:13" (1/1) ... [2020-11-28 07:36:13,751 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-28 07:36:13,753 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-28 07:36:13,754 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-28 07:36:13,754 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-28 07:36:13,765 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:36:13" (1/1) ... [2020-11-28 07:36:13,765 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:36:13" (1/1) ... [2020-11-28 07:36:13,789 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:36:13" (1/1) ... [2020-11-28 07:36:13,789 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:36:13" (1/1) ... [2020-11-28 07:36:13,796 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:36:13" (1/1) ... [2020-11-28 07:36:13,801 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:36:13" (1/1) ... [2020-11-28 07:36:13,804 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:36:13" (1/1) ... [2020-11-28 07:36:13,808 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-28 07:36:13,819 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-28 07:36:13,819 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-28 07:36:13,819 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-28 07:36:13,822 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:36:13" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1ca8fa43-8532-45d3-8274-5b21644e342d/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 [2020-11-28 07:36:13,899 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-11-28 07:36:13,899 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-11-28 07:36:13,899 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-11-28 07:36:13,900 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-11-28 07:36:13,900 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-28 07:36:13,901 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-11-28 07:36:13,901 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-28 07:36:13,901 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-28 07:36:13,912 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-28 07:36:13,912 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-11-28 07:36:13,913 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-28 07:36:13,913 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-28 07:36:13,915 WARN L208 CfgBuilder]: User set CodeBlockSize to LoopFreeBlock but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-11-28 07:36:14,582 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-28 07:36:14,583 INFO L298 CfgBuilder]: Removed 8 assume(true) statements. [2020-11-28 07:36:14,586 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:36:14 BoogieIcfgContainer [2020-11-28 07:36:14,587 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-28 07:36:14,590 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-28 07:36:14,590 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-28 07:36:14,595 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-28 07:36:14,595 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 07:36:12" (1/3) ... [2020-11-28 07:36:14,596 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47a5a7a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 07:36:14, skipping insertion in model container [2020-11-28 07:36:14,596 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:36:13" (2/3) ... [2020-11-28 07:36:14,597 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47a5a7a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 07:36:14, skipping insertion in model container [2020-11-28 07:36:14,597 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:36:14" (3/3) ... [2020-11-28 07:36:14,599 INFO L111 eAbstractionObserver]: Analyzing ICFG triangular-2.i [2020-11-28 07:36:14,613 WARN L153 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-11-28 07:36:14,613 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-28 07:36:14,618 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-28 07:36:14,619 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-11-28 07:36:14,668 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:36:14,669 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:36:14,669 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:36:14,670 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:36:14,670 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:36:14,670 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:36:14,671 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:36:14,672 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:36:14,672 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:36:14,673 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:36:14,673 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:36:14,673 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:36:14,673 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:36:14,674 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:36:14,674 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:36:14,675 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:36:14,676 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:36:14,677 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:36:14,677 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:36:14,678 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:36:14,678 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:36:14,679 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:36:14,679 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:36:14,679 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:36:14,681 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:36:14,681 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:36:14,682 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:36:14,683 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:36:14,685 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:36:14,685 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:36:14,686 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:36:14,686 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:36:14,687 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:36:14,687 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:36:14,693 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:36:14,694 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:36:14,694 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:36:14,694 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:36:14,694 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:36:14,695 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:36:14,701 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2020-11-28 07:36:14,714 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-11-28 07:36:14,756 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-28 07:36:14,757 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-28 07:36:14,757 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-28 07:36:14,757 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-28 07:36:14,757 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-28 07:36:14,758 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-28 07:36:14,758 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-28 07:36:14,758 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-28 07:36:14,775 INFO L129 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-11-28 07:36:14,777 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 65 places, 64 transitions, 138 flow [2020-11-28 07:36:14,781 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 65 places, 64 transitions, 138 flow [2020-11-28 07:36:14,784 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 65 places, 64 transitions, 138 flow [2020-11-28 07:36:14,824 INFO L129 PetriNetUnfolder]: 6/62 cut-off events. [2020-11-28 07:36:14,824 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-11-28 07:36:14,828 INFO L80 FinitePrefix]: Finished finitePrefix Result has 69 conditions, 62 events. 6/62 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 86 event pairs, 0 based on Foata normal form. 0/55 useless extension candidates. Maximal degree in co-relation 46. Up to 2 conditions per place. [2020-11-28 07:36:14,831 INFO L116 LiptonReduction]: Number of co-enabled transitions 1144 [2020-11-28 07:36:16,067 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 35 [2020-11-28 07:36:16,613 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2020-11-28 07:36:16,733 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2020-11-28 07:36:17,215 WARN L193 SmtUtils]: Spent 429.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 89 [2020-11-28 07:36:17,396 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-11-28 07:36:17,421 INFO L131 LiptonReduction]: Checked pairs total: 1062 [2020-11-28 07:36:17,421 INFO L133 LiptonReduction]: Total number of compositions: 60 [2020-11-28 07:36:17,426 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 16 transitions, 42 flow [2020-11-28 07:36:17,435 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 44 states. [2020-11-28 07:36:17,437 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-11-28 07:36:17,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-11-28 07:36:17,442 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:36:17,442 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-11-28 07:36:17,443 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:36:17,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:36:17,447 INFO L82 PathProgramCache]: Analyzing trace with hash -720017533, now seen corresponding path program 1 times [2020-11-28 07:36:17,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:36:17,459 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910463528] [2020-11-28 07:36:17,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:36:17,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:36:17,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:36:17,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910463528] [2020-11-28 07:36:17,706 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:36:17,706 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-28 07:36:17,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774110639] [2020-11-28 07:36:17,711 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 07:36:17,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:36:17,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 07:36:17,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:36:17,734 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2020-11-28 07:36:17,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:36:17,863 INFO L93 Difference]: Finished difference Result 75 states and 190 transitions. [2020-11-28 07:36:17,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-28 07:36:17,866 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-11-28 07:36:17,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:36:17,877 INFO L225 Difference]: With dead ends: 75 [2020-11-28 07:36:17,877 INFO L226 Difference]: Without dead ends: 42 [2020-11-28 07:36:17,879 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-28 07:36:17,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-11-28 07:36:17,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-11-28 07:36:17,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-11-28 07:36:17,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 98 transitions. [2020-11-28 07:36:17,927 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 98 transitions. Word has length 6 [2020-11-28 07:36:17,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:36:17,928 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 98 transitions. [2020-11-28 07:36:17,928 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 07:36:17,928 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 98 transitions. [2020-11-28 07:36:17,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-11-28 07:36:17,929 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:36:17,930 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:36:17,930 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-28 07:36:17,930 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:36:17,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:36:17,931 INFO L82 PathProgramCache]: Analyzing trace with hash -447013893, now seen corresponding path program 1 times [2020-11-28 07:36:17,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:36:17,932 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149792953] [2020-11-28 07:36:17,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:36:17,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:36:18,074 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:36:18,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149792953] [2020-11-28 07:36:18,075 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:36:18,075 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 07:36:18,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566971750] [2020-11-28 07:36:18,077 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-28 07:36:18,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:36:18,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-28 07:36:18,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-28 07:36:18,078 INFO L87 Difference]: Start difference. First operand 42 states and 98 transitions. Second operand 5 states. [2020-11-28 07:36:18,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:36:18,134 INFO L93 Difference]: Finished difference Result 56 states and 130 transitions. [2020-11-28 07:36:18,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 07:36:18,135 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-11-28 07:36:18,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:36:18,137 INFO L225 Difference]: With dead ends: 56 [2020-11-28 07:36:18,137 INFO L226 Difference]: Without dead ends: 50 [2020-11-28 07:36:18,138 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-11-28 07:36:18,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-11-28 07:36:18,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2020-11-28 07:36:18,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-11-28 07:36:18,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 100 transitions. [2020-11-28 07:36:18,152 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 100 transitions. Word has length 8 [2020-11-28 07:36:18,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:36:18,153 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 100 transitions. [2020-11-28 07:36:18,153 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-28 07:36:18,153 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 100 transitions. [2020-11-28 07:36:18,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-28 07:36:18,155 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:36:18,156 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:36:18,156 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-28 07:36:18,156 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:36:18,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:36:18,169 INFO L82 PathProgramCache]: Analyzing trace with hash -190894617, now seen corresponding path program 1 times [2020-11-28 07:36:18,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:36:18,169 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246990709] [2020-11-28 07:36:18,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:36:18,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:36:18,356 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:36:18,356 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246990709] [2020-11-28 07:36:18,356 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:36:18,356 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 07:36:18,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587465409] [2020-11-28 07:36:18,357 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-28 07:36:18,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:36:18,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-28 07:36:18,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-11-28 07:36:18,361 INFO L87 Difference]: Start difference. First operand 42 states and 100 transitions. Second operand 6 states. [2020-11-28 07:36:18,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:36:18,508 INFO L93 Difference]: Finished difference Result 54 states and 124 transitions. [2020-11-28 07:36:18,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-28 07:36:18,511 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-11-28 07:36:18,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:36:18,512 INFO L225 Difference]: With dead ends: 54 [2020-11-28 07:36:18,513 INFO L226 Difference]: Without dead ends: 47 [2020-11-28 07:36:18,513 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-11-28 07:36:18,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-11-28 07:36:18,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2020-11-28 07:36:18,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-11-28 07:36:18,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 106 transitions. [2020-11-28 07:36:18,519 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 106 transitions. Word has length 10 [2020-11-28 07:36:18,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:36:18,519 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 106 transitions. [2020-11-28 07:36:18,520 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-28 07:36:18,520 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 106 transitions. [2020-11-28 07:36:18,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-28 07:36:18,521 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:36:18,521 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:36:18,521 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-28 07:36:18,521 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:36:18,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:36:18,522 INFO L82 PathProgramCache]: Analyzing trace with hash -83647017, now seen corresponding path program 2 times [2020-11-28 07:36:18,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:36:18,523 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932502366] [2020-11-28 07:36:18,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:36:18,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:36:18,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:36:18,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932502366] [2020-11-28 07:36:18,656 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:36:18,656 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 07:36:18,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595822849] [2020-11-28 07:36:18,657 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-28 07:36:18,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:36:18,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-28 07:36:18,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-11-28 07:36:18,658 INFO L87 Difference]: Start difference. First operand 45 states and 106 transitions. Second operand 6 states. [2020-11-28 07:36:18,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:36:18,798 INFO L93 Difference]: Finished difference Result 84 states and 192 transitions. [2020-11-28 07:36:18,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-28 07:36:18,801 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-11-28 07:36:18,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:36:18,803 INFO L225 Difference]: With dead ends: 84 [2020-11-28 07:36:18,803 INFO L226 Difference]: Without dead ends: 77 [2020-11-28 07:36:18,803 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-11-28 07:36:18,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-11-28 07:36:18,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 47. [2020-11-28 07:36:18,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-11-28 07:36:18,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 115 transitions. [2020-11-28 07:36:18,828 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 115 transitions. Word has length 10 [2020-11-28 07:36:18,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:36:18,828 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 115 transitions. [2020-11-28 07:36:18,829 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-28 07:36:18,829 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 115 transitions. [2020-11-28 07:36:18,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-28 07:36:18,831 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:36:18,831 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:36:18,831 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-28 07:36:18,832 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:36:18,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:36:18,839 INFO L82 PathProgramCache]: Analyzing trace with hash -83970657, now seen corresponding path program 3 times [2020-11-28 07:36:18,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:36:18,839 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283335766] [2020-11-28 07:36:18,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:36:18,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:36:18,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:36:18,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283335766] [2020-11-28 07:36:18,944 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:36:18,944 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 07:36:18,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583646228] [2020-11-28 07:36:18,945 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-28 07:36:18,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:36:18,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-28 07:36:18,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-11-28 07:36:18,946 INFO L87 Difference]: Start difference. First operand 47 states and 115 transitions. Second operand 6 states. [2020-11-28 07:36:19,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:36:19,077 INFO L93 Difference]: Finished difference Result 61 states and 139 transitions. [2020-11-28 07:36:19,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-28 07:36:19,078 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-11-28 07:36:19,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:36:19,079 INFO L225 Difference]: With dead ends: 61 [2020-11-28 07:36:19,079 INFO L226 Difference]: Without dead ends: 50 [2020-11-28 07:36:19,080 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-11-28 07:36:19,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-11-28 07:36:19,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 40. [2020-11-28 07:36:19,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-11-28 07:36:19,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 96 transitions. [2020-11-28 07:36:19,093 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 96 transitions. Word has length 10 [2020-11-28 07:36:19,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:36:19,094 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 96 transitions. [2020-11-28 07:36:19,094 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-28 07:36:19,094 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 96 transitions. [2020-11-28 07:36:19,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-28 07:36:19,095 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:36:19,095 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:36:19,095 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-28 07:36:19,095 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:36:19,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:36:19,096 INFO L82 PathProgramCache]: Analyzing trace with hash -118912617, now seen corresponding path program 4 times [2020-11-28 07:36:19,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:36:19,096 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371592442] [2020-11-28 07:36:19,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:36:19,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:36:19,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:36:19,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371592442] [2020-11-28 07:36:19,199 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:36:19,199 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 07:36:19,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315589810] [2020-11-28 07:36:19,199 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-28 07:36:19,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:36:19,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-28 07:36:19,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-11-28 07:36:19,201 INFO L87 Difference]: Start difference. First operand 40 states and 96 transitions. Second operand 6 states. [2020-11-28 07:36:19,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:36:19,317 INFO L93 Difference]: Finished difference Result 55 states and 129 transitions. [2020-11-28 07:36:19,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-28 07:36:19,323 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-11-28 07:36:19,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:36:19,324 INFO L225 Difference]: With dead ends: 55 [2020-11-28 07:36:19,324 INFO L226 Difference]: Without dead ends: 49 [2020-11-28 07:36:19,325 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2020-11-28 07:36:19,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-11-28 07:36:19,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 41. [2020-11-28 07:36:19,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-11-28 07:36:19,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 99 transitions. [2020-11-28 07:36:19,334 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 99 transitions. Word has length 10 [2020-11-28 07:36:19,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:36:19,334 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 99 transitions. [2020-11-28 07:36:19,334 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-28 07:36:19,334 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 99 transitions. [2020-11-28 07:36:19,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-28 07:36:19,335 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:36:19,335 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:36:19,336 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-28 07:36:19,336 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:36:19,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:36:19,336 INFO L82 PathProgramCache]: Analyzing trace with hash 1691902418, now seen corresponding path program 5 times [2020-11-28 07:36:19,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:36:19,337 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300543006] [2020-11-28 07:36:19,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:36:19,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:36:19,444 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:36:19,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300543006] [2020-11-28 07:36:19,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223041195] [2020-11-28 07:36:19,445 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1ca8fa43-8532-45d3-8274-5b21644e342d/bin/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:36:19,525 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-11-28 07:36:19,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 07:36:19,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-28 07:36:19,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:36:19,621 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 07:36:19,664 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:36:19,664 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:36:19,669 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-28 07:36:19,669 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-28 07:36:19,719 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-28 07:36:19,719 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-28 07:36:19,787 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-28 07:36:19,835 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:36:19,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1628868504] [2020-11-28 07:36:19,840 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:294) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:269) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1603) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:234) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:213) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:111) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:289) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:189) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:179) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:511) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:142) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:360) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:182) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:134) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2020-11-28 07:36:19,842 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-28 07:36:19,842 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2020-11-28 07:36:19,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661161386] [2020-11-28 07:36:19,843 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-28 07:36:19,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:36:19,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-28 07:36:19,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-11-28 07:36:19,844 INFO L87 Difference]: Start difference. First operand 41 states and 99 transitions. Second operand 13 states. [2020-11-28 07:36:20,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:36:20,127 INFO L93 Difference]: Finished difference Result 82 states and 197 transitions. [2020-11-28 07:36:20,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-11-28 07:36:20,129 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-11-28 07:36:20,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:36:20,130 INFO L225 Difference]: With dead ends: 82 [2020-11-28 07:36:20,130 INFO L226 Difference]: Without dead ends: 56 [2020-11-28 07:36:20,130 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=184, Invalid=368, Unknown=0, NotChecked=0, Total=552 [2020-11-28 07:36:20,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-11-28 07:36:20,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 40. [2020-11-28 07:36:20,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-11-28 07:36:20,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 97 transitions. [2020-11-28 07:36:20,135 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 97 transitions. Word has length 11 [2020-11-28 07:36:20,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:36:20,135 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 97 transitions. [2020-11-28 07:36:20,135 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-11-28 07:36:20,136 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 97 transitions. [2020-11-28 07:36:20,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-28 07:36:20,136 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:36:20,136 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:36:20,343 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-11-28 07:36:20,343 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:36:20,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:36:20,344 INFO L82 PathProgramCache]: Analyzing trace with hash -1230025166, now seen corresponding path program 6 times [2020-11-28 07:36:20,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:36:20,344 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136135684] [2020-11-28 07:36:20,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:36:20,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:36:20,465 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-28 07:36:20,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136135684] [2020-11-28 07:36:20,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349647623] [2020-11-28 07:36:20,466 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1ca8fa43-8532-45d3-8274-5b21644e342d/bin/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:36:20,533 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-28 07:36:20,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 07:36:20,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-28 07:36:20,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:36:20,560 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-28 07:36:20,560 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:36:20,562 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-28 07:36:20,562 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-28 07:36:20,647 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-28 07:36:20,671 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-28 07:36:20,701 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-28 07:36:20,731 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-28 07:36:20,763 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-28 07:36:20,805 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-28 07:36:20,805 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-28 07:36:20,843 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-28 07:36:20,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [258711684] [2020-11-28 07:36:20,846 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:294) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:269) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1603) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:234) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:213) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:111) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:289) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:189) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:179) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:511) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:142) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:360) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:182) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:134) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2020-11-28 07:36:20,846 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-28 07:36:20,846 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2020-11-28 07:36:20,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503924250] [2020-11-28 07:36:20,847 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-28 07:36:20,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:36:20,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-28 07:36:20,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-11-28 07:36:20,848 INFO L87 Difference]: Start difference. First operand 40 states and 97 transitions. Second operand 16 states. [2020-11-28 07:36:21,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:36:21,160 INFO L93 Difference]: Finished difference Result 91 states and 202 transitions. [2020-11-28 07:36:21,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-28 07:36:21,160 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 14 [2020-11-28 07:36:21,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:36:21,161 INFO L225 Difference]: With dead ends: 91 [2020-11-28 07:36:21,161 INFO L226 Difference]: Without dead ends: 66 [2020-11-28 07:36:21,162 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=227, Invalid=475, Unknown=0, NotChecked=0, Total=702 [2020-11-28 07:36:21,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-11-28 07:36:21,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 58. [2020-11-28 07:36:21,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-11-28 07:36:21,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 136 transitions. [2020-11-28 07:36:21,168 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 136 transitions. Word has length 14 [2020-11-28 07:36:21,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:36:21,168 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 136 transitions. [2020-11-28 07:36:21,168 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-11-28 07:36:21,169 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 136 transitions. [2020-11-28 07:36:21,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-28 07:36:21,169 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:36:21,169 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:36:21,398 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:36:21,399 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:36:21,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:36:21,399 INFO L82 PathProgramCache]: Analyzing trace with hash 415819444, now seen corresponding path program 7 times [2020-11-28 07:36:21,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:36:21,399 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516510847] [2020-11-28 07:36:21,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:36:21,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:36:21,549 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-28 07:36:21,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516510847] [2020-11-28 07:36:21,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041211713] [2020-11-28 07:36:21,550 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1ca8fa43-8532-45d3-8274-5b21644e342d/bin/utaipan/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:36:21,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:36:21,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-28 07:36:21,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:36:21,692 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-28 07:36:21,724 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-28 07:36:21,724 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:36:21,725 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-28 07:36:21,726 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-28 07:36:21,747 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-28 07:36:21,747 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-28 07:36:21,766 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-28 07:36:21,843 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-28 07:36:21,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1908266205] [2020-11-28 07:36:21,844 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:294) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:269) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1603) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:234) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:213) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:111) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:289) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:189) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:179) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:511) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:142) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:360) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:182) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:134) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2020-11-28 07:36:21,844 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-28 07:36:21,845 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2020-11-28 07:36:21,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988400498] [2020-11-28 07:36:21,845 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-28 07:36:21,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:36:21,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-28 07:36:21,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2020-11-28 07:36:21,847 INFO L87 Difference]: Start difference. First operand 58 states and 136 transitions. Second operand 17 states. [2020-11-28 07:36:22,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:36:22,451 INFO L93 Difference]: Finished difference Result 157 states and 377 transitions. [2020-11-28 07:36:22,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-11-28 07:36:22,451 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-11-28 07:36:22,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:36:22,452 INFO L225 Difference]: With dead ends: 157 [2020-11-28 07:36:22,453 INFO L226 Difference]: Without dead ends: 108 [2020-11-28 07:36:22,454 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 388 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=478, Invalid=1004, Unknown=0, NotChecked=0, Total=1482 [2020-11-28 07:36:22,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-11-28 07:36:22,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 65. [2020-11-28 07:36:22,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-11-28 07:36:22,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 161 transitions. [2020-11-28 07:36:22,460 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 161 transitions. Word has length 14 [2020-11-28 07:36:22,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:36:22,460 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 161 transitions. [2020-11-28 07:36:22,460 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-11-28 07:36:22,461 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 161 transitions. [2020-11-28 07:36:22,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-11-28 07:36:22,461 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:36:22,461 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:36:22,685 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:36:22,686 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:36:22,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:36:22,686 INFO L82 PathProgramCache]: Analyzing trace with hash 1483738395, now seen corresponding path program 8 times [2020-11-28 07:36:22,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:36:22,686 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310645361] [2020-11-28 07:36:22,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:36:22,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:36:22,833 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:36:22,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310645361] [2020-11-28 07:36:22,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643732995] [2020-11-28 07:36:22,834 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1ca8fa43-8532-45d3-8274-5b21644e342d/bin/utaipan/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:36:22,903 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-11-28 07:36:22,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 07:36:22,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-28 07:36:22,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:36:22,949 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:36:22,949 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:36:22,951 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-28 07:36:22,951 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-28 07:36:22,972 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-28 07:36:22,973 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-28 07:36:23,025 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:36:23,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1988199081] [2020-11-28 07:36:23,028 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:294) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:269) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1603) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:234) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:213) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:111) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:289) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:189) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:179) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:511) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:142) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:360) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:182) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:134) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2020-11-28 07:36:23,030 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-28 07:36:23,030 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 14 [2020-11-28 07:36:23,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324893332] [2020-11-28 07:36:23,031 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-28 07:36:23,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:36:23,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-28 07:36:23,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2020-11-28 07:36:23,032 INFO L87 Difference]: Start difference. First operand 65 states and 161 transitions. Second operand 16 states. [2020-11-28 07:36:23,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:36:23,524 INFO L93 Difference]: Finished difference Result 124 states and 303 transitions. [2020-11-28 07:36:23,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-11-28 07:36:23,525 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 17 [2020-11-28 07:36:23,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:36:23,526 INFO L225 Difference]: With dead ends: 124 [2020-11-28 07:36:23,526 INFO L226 Difference]: Without dead ends: 104 [2020-11-28 07:36:23,527 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=358, Invalid=832, Unknown=0, NotChecked=0, Total=1190 [2020-11-28 07:36:23,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-11-28 07:36:23,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 66. [2020-11-28 07:36:23,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-11-28 07:36:23,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 164 transitions. [2020-11-28 07:36:23,534 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 164 transitions. Word has length 17 [2020-11-28 07:36:23,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:36:23,534 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 164 transitions. [2020-11-28 07:36:23,534 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-11-28 07:36:23,535 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 164 transitions. [2020-11-28 07:36:23,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-11-28 07:36:23,536 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:36:23,536 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:36:23,750 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:36:23,750 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:36:23,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:36:23,751 INFO L82 PathProgramCache]: Analyzing trace with hash 832673395, now seen corresponding path program 9 times [2020-11-28 07:36:23,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:36:23,751 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057196160] [2020-11-28 07:36:23,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:36:23,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 07:36:23,775 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 07:36:23,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 07:36:23,792 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 07:36:23,813 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2020-11-28 07:36:23,813 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-28 07:36:23,814 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-11-28 07:36:23,865 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 07:36:23 BasicIcfg [2020-11-28 07:36:23,865 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-28 07:36:23,866 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-28 07:36:23,866 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-28 07:36:23,866 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-28 07:36:23,867 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:36:14" (3/4) ... [2020-11-28 07:36:23,869 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-28 07:36:23,993 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_1ca8fa43-8532-45d3-8274-5b21644e342d/bin/utaipan/witness.graphml [2020-11-28 07:36:23,993 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-28 07:36:23,994 INFO L168 Benchmark]: Toolchain (without parser) took 11057.06 ms. Allocated memory was 94.4 MB in the beginning and 163.6 MB in the end (delta: 69.2 MB). Free memory was 64.8 MB in the beginning and 75.4 MB in the end (delta: -10.7 MB). Peak memory consumption was 58.4 MB. Max. memory is 16.1 GB. [2020-11-28 07:36:23,995 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 94.4 MB. Free memory was 52.2 MB in the beginning and 52.2 MB in the end (delta: 15.6 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 07:36:23,995 INFO L168 Benchmark]: CACSL2BoogieTranslator took 760.03 ms. Allocated memory is still 94.4 MB. Free memory was 64.8 MB in the beginning and 52.6 MB in the end (delta: 12.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-28 07:36:23,996 INFO L168 Benchmark]: Boogie Procedure Inliner took 51.65 ms. Allocated memory is still 94.4 MB. Free memory was 52.6 MB in the beginning and 50.9 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 07:36:23,996 INFO L168 Benchmark]: Boogie Preprocessor took 64.55 ms. Allocated memory is still 94.4 MB. Free memory was 50.9 MB in the beginning and 49.5 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 07:36:23,997 INFO L168 Benchmark]: RCFGBuilder took 768.14 ms. Allocated memory was 94.4 MB in the beginning and 113.2 MB in the end (delta: 18.9 MB). Free memory was 49.2 MB in the beginning and 75.8 MB in the end (delta: -26.6 MB). Peak memory consumption was 7.8 MB. Max. memory is 16.1 GB. [2020-11-28 07:36:23,997 INFO L168 Benchmark]: TraceAbstraction took 9275.31 ms. Allocated memory was 113.2 MB in the beginning and 163.6 MB in the end (delta: 50.3 MB). Free memory was 75.8 MB in the beginning and 80.7 MB in the end (delta: -4.9 MB). Peak memory consumption was 44.9 MB. Max. memory is 16.1 GB. [2020-11-28 07:36:23,997 INFO L168 Benchmark]: Witness Printer took 127.54 ms. Allocated memory is still 163.6 MB. Free memory was 80.7 MB in the beginning and 75.4 MB in the end (delta: 5.2 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2020-11-28 07:36:24,002 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 94.4 MB. Free memory was 52.2 MB in the beginning and 52.2 MB in the end (delta: 15.6 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 760.03 ms. Allocated memory is still 94.4 MB. Free memory was 64.8 MB in the beginning and 52.6 MB in the end (delta: 12.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 51.65 ms. Allocated memory is still 94.4 MB. Free memory was 52.6 MB in the beginning and 50.9 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 64.55 ms. Allocated memory is still 94.4 MB. Free memory was 50.9 MB in the beginning and 49.5 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 768.14 ms. Allocated memory was 94.4 MB in the beginning and 113.2 MB in the end (delta: 18.9 MB). Free memory was 49.2 MB in the beginning and 75.8 MB in the end (delta: -26.6 MB). Peak memory consumption was 7.8 MB. Max. memory is 16.1 GB. * TraceAbstraction took 9275.31 ms. Allocated memory was 113.2 MB in the beginning and 163.6 MB in the end (delta: 50.3 MB). Free memory was 75.8 MB in the beginning and 80.7 MB in the end (delta: -4.9 MB). Peak memory consumption was 44.9 MB. Max. memory is 16.1 GB. * Witness Printer took 127.54 ms. Allocated memory is still 163.6 MB. Free memory was 80.7 MB in the beginning and 75.4 MB in the end (delta: 5.2 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks 751 VarBasedMoverChecksPositive, 13 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 13 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.1s, 10 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 2.6s, 65 PlacesBefore, 20 PlacesAfterwards, 64 TransitionsBefore, 16 TransitionsAfterwards, 1144 CoEnabledTransitionPairs, 5 FixpointIterations, 16 TrivialSequentialCompositions, 30 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 11 ConcurrentYvCompositions, 3 ChoiceCompositions, 60 TotalNumberOfCompositions, 1062 MoverChecksTotal - CounterExampleResult [Line: 693]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L694] 0 int i = 3, j = 6; [L712] 0 pthread_t id1, id2; [L713] FCALL, FORK 0 pthread_create(&id1, ((void *)0), t1, ((void *)0)) VAL [arg={0:0}, i=3, j=6] [L714] FCALL, FORK 0 pthread_create(&id2, ((void *)0), t2, ((void *)0)) VAL [arg={0:0}, arg={0:0}, i=3, j=6] [L716] 0 int condI = i >= (2*5 +6); VAL [arg={0:0}, arg={0:0}, i=3, j=6] [L696] 1 int k = 0; VAL [arg={0:0}, arg={0:0}, arg={0:0}, i=3, j=6, k=0] [L696] COND TRUE 1 k < 5 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=1] [L704] 2 int k = 0; VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=0, k=1] [L704] COND TRUE 2 k < 5 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=8, k=1, k=1] [L696] COND TRUE 1 k < 5 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=8, k=2, k=1] [L704] COND TRUE 2 k < 5 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=10, k=2, k=2] [L696] COND TRUE 1 k < 5 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=10, k=2, k=3] [L704] COND TRUE 2 k < 5 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=12, k=3, k=3] [L696] COND TRUE 1 k < 5 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=12, k=4, k=3] [L704] COND TRUE 2 k < 5 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=14, k=4, k=4] [L696] COND TRUE 1 k < 5 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=14, k=5, k=4] [L704] COND TRUE 2 k < 5 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=5, k=5] [L719] 0 int condJ = j >= (2*5 +6); [L721] COND TRUE 0 condI || condJ [L693] COND FALSE 0 !(0) [L693] 0 __assert_fail ("0", "triangular-2.c", 8, __extension__ __PRETTY_FUNCTION__) VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=5, k=5] - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 59 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 9.0s, OverallIterations: 11, TraceHistogramMax: 5, AutomataDifference: 2.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.6s, HoareTripleCheckerStatistics: 147 SDtfs, 493 SDslu, 474 SDs, 0 SdLazy, 487 SolverSat, 234 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 232 GetRequests, 75 SyntacticMatches, 5 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 906 ImplicationChecksByTransitivity, 2.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=66occurred in iteration=10, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 10 MinimizatonAttempts, 163 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 1.9s InterpolantComputationTime, 184 NumberOfCodeBlocks, 184 NumberOfCodeBlocksAsserted, 21 NumberOfCheckSat, 204 ConstructedInterpolants, 0 QuantifiedInterpolants, 10590 SizeOfPredicates, 22 NumberOfNonLiveVariables, 432 ConjunctsInSsa, 39 ConjunctsInUnsatCore, 18 InterpolantComputations, 6 PerfectInterpolantSequences, 6/93 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 incorrect! Received shutdown request...