/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-RepeatedSemanticLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/regression/ThreadIdListTest-Safe.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-0e22065b97d0a1f8b3904e080cebe0f05e88d2b7-0e22065 [2021-06-11 09:25:33,590 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-11 09:25:33,593 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-11 09:25:33,631 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-06-11 09:25:33,632 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-06-11 09:25:33,634 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-06-11 09:25:33,637 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-06-11 09:25:33,642 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-06-11 09:25:33,644 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-06-11 09:25:33,648 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-06-11 09:25:33,649 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-06-11 09:25:33,650 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-06-11 09:25:33,650 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-06-11 09:25:33,652 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-06-11 09:25:33,653 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-06-11 09:25:33,654 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-06-11 09:25:33,657 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-06-11 09:25:33,657 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-06-11 09:25:33,660 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-06-11 09:25:33,665 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-06-11 09:25:33,666 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-06-11 09:25:33,667 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-06-11 09:25:33,668 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-06-11 09:25:33,670 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-06-11 09:25:33,676 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-06-11 09:25:33,684 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-06-11 09:25:33,685 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-06-11 09:25:33,686 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-06-11 09:25:33,689 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-RepeatedSemanticLbe.epf [2021-06-11 09:25:33,711 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-11 09:25:33,712 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-11 09:25:33,713 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-11 09:25:33,713 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-11 09:25:33,713 INFO L138 SettingsManager]: * Use SBE=true [2021-06-11 09:25:33,713 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-11 09:25:33,714 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-11 09:25:33,714 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-11 09:25:33,714 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-11 09:25:33,714 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-11 09:25:33,714 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-11 09:25:33,714 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-11 09:25:33,715 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-11 09:25:33,715 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-11 09:25:33,715 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-11 09:25:33,715 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-11 09:25:33,715 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-11 09:25:33,715 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-11 09:25:33,715 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-11 09:25:33,716 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-11 09:25:33,716 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-11 09:25:33,716 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-11 09:25:33,716 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-11 09:25:33,716 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-11 09:25:33,716 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-11 09:25:33,717 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-11 09:25:33,717 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-11 09:25:33,717 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-06-11 09:25:33,717 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-06-11 09:25:33,717 INFO L138 SettingsManager]: * Apply repeated Lipton Reduction=true WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-11 09:25:34,036 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-11 09:25:34,053 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-11 09:25:34,055 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-11 09:25:34,056 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-11 09:25:34,058 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-11 09:25:34,059 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/regression/ThreadIdListTest-Safe.bpl [2021-06-11 09:25:34,059 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/regression/ThreadIdListTest-Safe.bpl' [2021-06-11 09:25:34,094 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-11 09:25:34,096 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-11 09:25:34,097 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-11 09:25:34,098 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-11 09:25:34,098 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-11 09:25:34,109 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "ThreadIdListTest-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.06 09:25:34" (1/1) ... [2021-06-11 09:25:34,115 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "ThreadIdListTest-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.06 09:25:34" (1/1) ... [2021-06-11 09:25:34,123 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-11 09:25:34,124 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-11 09:25:34,125 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-11 09:25:34,125 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-11 09:25:34,132 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "ThreadIdListTest-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.06 09:25:34" (1/1) ... [2021-06-11 09:25:34,132 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "ThreadIdListTest-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.06 09:25:34" (1/1) ... [2021-06-11 09:25:34,133 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "ThreadIdListTest-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.06 09:25:34" (1/1) ... [2021-06-11 09:25:34,133 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "ThreadIdListTest-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.06 09:25:34" (1/1) ... [2021-06-11 09:25:34,135 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "ThreadIdListTest-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.06 09:25:34" (1/1) ... [2021-06-11 09:25:34,136 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "ThreadIdListTest-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.06 09:25:34" (1/1) ... [2021-06-11 09:25:34,136 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "ThreadIdListTest-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.06 09:25:34" (1/1) ... [2021-06-11 09:25:34,137 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-11 09:25:34,138 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-11 09:25:34,138 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-11 09:25:34,138 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-11 09:25:34,139 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "ThreadIdListTest-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.06 09:25:34" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2021-06-11 09:25:34,206 INFO L130 BoogieDeclarations]: Found specification of procedure decrement [2021-06-11 09:25:34,206 INFO L138 BoogieDeclarations]: Found implementation of procedure decrement [2021-06-11 09:25:34,208 INFO L130 BoogieDeclarations]: Found specification of procedure increment [2021-06-11 09:25:34,208 INFO L138 BoogieDeclarations]: Found implementation of procedure increment [2021-06-11 09:25:34,209 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-11 09:25:34,209 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-11 09:25:34,211 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-11 09:25:34,312 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-11 09:25:34,312 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-11 09:25:34,314 INFO L202 PluginConnector]: Adding new model ThreadIdListTest-Safe.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.06 09:25:34 BoogieIcfgContainer [2021-06-11 09:25:34,314 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-11 09:25:34,315 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-11 09:25:34,315 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-11 09:25:34,318 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-11 09:25:34,318 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "ThreadIdListTest-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.06 09:25:34" (1/2) ... [2021-06-11 09:25:34,319 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46633b1a and model type ThreadIdListTest-Safe.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.06 09:25:34, skipping insertion in model container [2021-06-11 09:25:34,319 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "ThreadIdListTest-Safe.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.06 09:25:34" (2/2) ... [2021-06-11 09:25:34,320 INFO L111 eAbstractionObserver]: Analyzing ICFG ThreadIdListTest-Safe.bpl [2021-06-11 09:25:34,325 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-11 09:25:34,329 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-06-11 09:25:34,330 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-11 09:25:34,350 WARN L313 ript$VariableManager]: TermVariabe decrementThread1of1ForFork1_n not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-11 09:25:34,350 WARN L313 ript$VariableManager]: TermVariabe decrementThread1of1ForFork1_res not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-11 09:25:34,351 WARN L313 ript$VariableManager]: TermVariabe decrementThread1of1ForFork1_n not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-11 09:25:34,351 WARN L313 ript$VariableManager]: TermVariabe decrementThread1of1ForFork1_res not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-11 09:25:34,351 WARN L313 ript$VariableManager]: TermVariabe incrementThread1of1ForFork0_n not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-11 09:25:34,352 WARN L313 ript$VariableManager]: TermVariabe incrementThread1of1ForFork0_res not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-11 09:25:34,352 WARN L313 ript$VariableManager]: TermVariabe incrementThread1of1ForFork0_n not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-11 09:25:34,352 WARN L313 ript$VariableManager]: TermVariabe incrementThread1of1ForFork0_res not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-11 09:25:34,354 WARN L313 ript$VariableManager]: TermVariabe incrementThread1of1ForFork0_res not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-11 09:25:34,359 WARN L313 ript$VariableManager]: TermVariabe decrementThread1of1ForFork1_res not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-11 09:25:34,363 INFO L149 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2021-06-11 09:25:34,380 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-06-11 09:25:34,397 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-11 09:25:34,397 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-11 09:25:34,397 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-11 09:25:34,397 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-11 09:25:34,397 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-11 09:25:34,397 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-11 09:25:34,398 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-11 09:25:34,398 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-11 09:25:34,406 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 20 places, 13 transitions, 39 flow [2021-06-11 09:25:34,420 INFO L129 PetriNetUnfolder]: 0/11 cut-off events. [2021-06-11 09:25:34,420 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2021-06-11 09:25:34,422 INFO L84 FinitePrefix]: Finished finitePrefix Result has 19 conditions, 11 events. 0/11 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 6 event pairs, 0 based on Foata normal form. 0/10 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2021-06-11 09:25:34,422 INFO L82 GeneralOperation]: Start removeDead. Operand has 20 places, 13 transitions, 39 flow [2021-06-11 09:25:34,424 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 16 places, 9 transitions, 27 flow [2021-06-11 09:25:34,426 INFO L168 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-06-11 09:25:34,438 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 16 places, 9 transitions, 27 flow [2021-06-11 09:25:34,441 INFO L138 LiptonReduction]: Starting Lipton reduction on Petri net that has 16 places, 9 transitions, 27 flow [2021-06-11 09:25:34,442 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 16 places, 9 transitions, 27 flow [2021-06-11 09:25:34,446 INFO L129 PetriNetUnfolder]: 0/9 cut-off events. [2021-06-11 09:25:34,446 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2021-06-11 09:25:34,446 INFO L84 FinitePrefix]: Finished finitePrefix Result has 17 conditions, 9 events. 0/9 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 5 event pairs, 0 based on Foata normal form. 0/9 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2021-06-11 09:25:34,448 INFO L151 LiptonReduction]: Number of co-enabled transitions 20 [2021-06-11 09:25:34,505 INFO L163 LiptonReduction]: Checked pairs total: 7 [2021-06-11 09:25:34,506 INFO L165 LiptonReduction]: Total number of compositions: 2 [2021-06-11 09:25:34,508 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 83 [2021-06-11 09:25:34,516 INFO L129 PetriNetUnfolder]: 0/6 cut-off events. [2021-06-11 09:25:34,517 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2021-06-11 09:25:34,517 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-11 09:25:34,518 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2021-06-11 09:25:34,518 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-11 09:25:34,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-11 09:25:34,522 INFO L82 PathProgramCache]: Analyzing trace with hash 1428659103, now seen corresponding path program 1 times [2021-06-11 09:25:34,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-11 09:25:34,538 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811703417] [2021-06-11 09:25:34,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-11 09:25:34,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-11 09:25:34,708 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-11 09:25:34,717 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-11 09:25:34,725 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-11 09:25:34,726 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-11 09:25:34,734 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-11 09:25:34,735 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-11 09:25:34,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-11 09:25:34,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811703417] [2021-06-11 09:25:34,738 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-11 09:25:34,738 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-11 09:25:34,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790528742] [2021-06-11 09:25:34,746 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-11 09:25:34,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-11 09:25:34,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-11 09:25:34,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-11 09:25:34,774 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 15 [2021-06-11 09:25:34,775 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 14 places, 7 transitions, 23 flow. Second operand has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-11 09:25:34,775 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-11 09:25:34,775 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 15 [2021-06-11 09:25:34,776 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-11 09:25:34,781 INFO L129 PetriNetUnfolder]: 0/5 cut-off events. [2021-06-11 09:25:34,781 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2021-06-11 09:25:34,781 INFO L84 FinitePrefix]: Finished finitePrefix Result has 14 conditions, 5 events. 0/5 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 2 event pairs, 0 based on Foata normal form. 1/6 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2021-06-11 09:25:34,782 INFO L132 encePairwiseOnDemand]: 13/15 looper letters, 0 selfloop transitions, 0 changer transitions 5/5 dead transitions. [2021-06-11 09:25:34,782 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 14 places, 5 transitions, 18 flow [2021-06-11 09:25:34,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-11 09:25:34,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-11 09:25:34,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 38 transitions. [2021-06-11 09:25:34,794 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.8444444444444444 [2021-06-11 09:25:34,794 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 38 transitions. [2021-06-11 09:25:34,795 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 38 transitions. [2021-06-11 09:25:34,795 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-11 09:25:34,797 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 38 transitions. [2021-06-11 09:25:34,798 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-11 09:25:34,802 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-11 09:25:34,803 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-11 09:25:34,804 INFO L185 Difference]: Start difference. First operand has 14 places, 7 transitions, 23 flow. Second operand 3 states and 38 transitions. [2021-06-11 09:25:34,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 14 places, 5 transitions, 18 flow [2021-06-11 09:25:34,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 12 places, 5 transitions, 16 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-06-11 09:25:34,809 INFO L241 Difference]: Finished difference. Result has 12 places, 0 transitions, 0 flow [2021-06-11 09:25:34,810 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=15, PETRI_DIFFERENCE_MINUEND_FLOW=14, PETRI_DIFFERENCE_MINUEND_PLACES=10, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=5, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=5, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=0, PETRI_PLACES=12, PETRI_TRANSITIONS=0} [2021-06-11 09:25:34,811 INFO L343 CegarLoopForPetriNet]: 14 programPoint places, -2 predicate places. [2021-06-11 09:25:34,811 INFO L168 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-06-11 09:25:34,811 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 12 places, 0 transitions, 0 flow [2021-06-11 09:25:34,813 INFO L138 LiptonReduction]: Starting Lipton reduction on Petri net that has 12 places, 0 transitions, 0 flow [2021-06-11 09:25:34,813 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 0 places, 0 transitions, 0 flow [2021-06-11 09:25:34,814 INFO L129 PetriNetUnfolder]: 0/0 cut-off events. [2021-06-11 09:25:34,814 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-11 09:25:34,814 INFO L84 FinitePrefix]: Finished finitePrefix Result has 0 conditions, 0 events. 0/0 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 0. Compared 0 event pairs, 0 based on Foata normal form. 0/0 useless extension candidates. Maximal degree in co-relation 0. Up to 0 conditions per place. [2021-06-11 09:25:34,815 INFO L151 LiptonReduction]: Number of co-enabled transitions 0 [2021-06-11 09:25:34,815 INFO L163 LiptonReduction]: Checked pairs total: 0 [2021-06-11 09:25:34,815 INFO L165 LiptonReduction]: Total number of compositions: 0 [2021-06-11 09:25:34,815 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 4 [2021-06-11 09:25:34,817 INFO L480 AbstractCegarLoop]: Abstraction has has 0 places, 0 transitions, 0 flow [2021-06-11 09:25:34,817 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-11 09:25:34,818 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-11 09:25:34,822 INFO L202 PluginConnector]: Adding new model ThreadIdListTest-Safe.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.06 09:25:34 BasicIcfg [2021-06-11 09:25:34,822 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-11 09:25:34,825 INFO L168 Benchmark]: Toolchain (without parser) took 727.77 ms. Allocated memory is still 356.5 MB. Free memory was 336.8 MB in the beginning and 324.2 MB in the end (delta: 12.6 MB). Peak memory consumption was 15.0 MB. Max. memory is 16.0 GB. [2021-06-11 09:25:34,826 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.14 ms. Allocated memory is still 356.5 MB. Free memory was 337.8 MB in the beginning and 337.7 MB in the end (delta: 76.3 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-11 09:25:34,827 INFO L168 Benchmark]: Boogie Procedure Inliner took 25.71 ms. Allocated memory is still 356.5 MB. Free memory was 336.7 MB in the beginning and 335.2 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-11 09:25:34,829 INFO L168 Benchmark]: Boogie Preprocessor took 13.10 ms. Allocated memory is still 356.5 MB. Free memory was 335.2 MB in the beginning and 334.4 MB in the end (delta: 819.6 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-11 09:25:34,829 INFO L168 Benchmark]: RCFGBuilder took 175.90 ms. Allocated memory is still 356.5 MB. Free memory was 334.3 MB in the beginning and 326.0 MB in the end (delta: 8.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.0 GB. [2021-06-11 09:25:34,834 INFO L168 Benchmark]: TraceAbstraction took 507.68 ms. Allocated memory is still 356.5 MB. Free memory was 325.5 MB in the beginning and 324.2 MB in the end (delta: 1.3 MB). Peak memory consumption was 4.5 MB. Max. memory is 16.0 GB. [2021-06-11 09:25:34,838 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.14 ms. Allocated memory is still 356.5 MB. Free memory was 337.8 MB in the beginning and 337.7 MB in the end (delta: 76.3 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 25.71 ms. Allocated memory is still 356.5 MB. Free memory was 336.7 MB in the beginning and 335.2 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 13.10 ms. Allocated memory is still 356.5 MB. Free memory was 335.2 MB in the beginning and 334.4 MB in the end (delta: 819.6 kB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 175.90 ms. Allocated memory is still 356.5 MB. Free memory was 334.3 MB in the beginning and 326.0 MB in the end (delta: 8.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.0 GB. * TraceAbstraction took 507.68 ms. Allocated memory is still 356.5 MB. Free memory was 325.5 MB in the beginning and 324.2 MB in the end (delta: 1.3 MB). Peak memory consumption was 4.5 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 64.8ms, 16 PlacesBefore, 14 PlacesAfterwards, 9 TransitionsBefore, 7 TransitionsAfterwards, 20 CoEnabledTransitionPairs, 2 FixpointIterations, 0 TrivialSequentialCompositions, 2 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 2 TotalNumberOfCompositions, 7 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 7, positive: 7, positive conditional: 0, positive unconditional: 7, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 7, positive: 7, positive conditional: 0, positive unconditional: 7, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 7, positive: 7, positive conditional: 0, positive unconditional: 7, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 7, positive: 7, positive conditional: 0, positive unconditional: 7, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 7, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 7, unknown conditional: 0, unknown unconditional: 7] , Statistics on independence cache: Total cache size (in pairs): 9, Positive cache size: 9, Positive conditional cache size: 0, Positive unconditional cache size: 9, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.2ms, 12 PlacesBefore, 0 PlacesAfterwards, 0 TransitionsBefore, 0 TransitionsAfterwards, 0 CoEnabledTransitionPairs, 1 FixpointIterations, 0 TrivialSequentialCompositions, 0 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 0 TotalNumberOfCompositions, 0 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Statistics on independence cache: Total cache size (in pairs): 9, Positive cache size: 9, Positive conditional cache size: 0, Positive unconditional cache size: 9, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0 - PositiveResult [Line: 22]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 14 locations, 1 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 3.4ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: SAFE, OverallTime: 425.6ms, OverallIterations: 1, TraceHistogramMax: 1, EmptinessCheckTime: 0.0ms, AutomataDifference: 52.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 115.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 1 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=23occurred in iteration=0, InterpolantAutomatonStates: 3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 3.2ms SsaConstructionTime, 22.0ms SatisfiabilityAnalysisTime, 71.9ms InterpolantComputationTime, 6 NumberOfCodeBlocks, 6 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 5 ConstructedInterpolants, 0 QuantifiedInterpolants, 11 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! Received shutdown request...