/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-RepeatedVariableLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/regression/join_multiple_return_values.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-d5b4239aa45c8d22a30959944f2ef622f7386a6d-d5b4239 [2021-03-25 07:54:41,976 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-03-25 07:54:41,978 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-03-25 07:54:42,015 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-03-25 07:54:42,074 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-RepeatedVariableLbe.epf [2021-03-25 07:54:42,110 INFO L113 SettingsManager]: Loading preferences was successful [2021-03-25 07:54:42,110 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-03-25 07:54:42,113 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-03-25 07:54:42,113 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-03-25 07:54:42,113 INFO L138 SettingsManager]: * Use SBE=true [2021-03-25 07:54:42,113 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-03-25 07:54:42,113 INFO L138 SettingsManager]: * sizeof long=4 [2021-03-25 07:54:42,114 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-03-25 07:54:42,114 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-03-25 07:54:42,114 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-03-25 07:54:42,115 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-03-25 07:54:42,115 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-03-25 07:54:42,115 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-03-25 07:54:42,115 INFO L138 SettingsManager]: * sizeof long double=12 [2021-03-25 07:54:42,116 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-03-25 07:54:42,116 INFO L138 SettingsManager]: * Use constant arrays=true [2021-03-25 07:54:42,116 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-03-25 07:54:42,116 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-03-25 07:54:42,116 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-03-25 07:54:42,116 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-03-25 07:54:42,117 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-03-25 07:54:42,117 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-25 07:54:42,117 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-03-25 07:54:42,117 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-03-25 07:54:42,117 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-03-25 07:54:42,118 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-03-25 07:54:42,118 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-03-25 07:54:42,118 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=VARIABLE_BASED_MOVER_CHECK [2021-03-25 07:54:42,118 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-03-25 07:54:42,118 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-03-25 07:54:42,118 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-03-25 07:54:42,411 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-03-25 07:54:42,447 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-03-25 07:54:42,449 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-03-25 07:54:42,450 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-03-25 07:54:42,451 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-03-25 07:54:42,452 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/regression/join_multiple_return_values.bpl [2021-03-25 07:54:42,452 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/regression/join_multiple_return_values.bpl' [2021-03-25 07:54:42,495 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-03-25 07:54:42,497 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-03-25 07:54:42,498 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-03-25 07:54:42,498 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-03-25 07:54:42,498 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-03-25 07:54:42,508 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "join_multiple_return_values.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.03 07:54:42" (1/1) ... [2021-03-25 07:54:42,513 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "join_multiple_return_values.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.03 07:54:42" (1/1) ... [2021-03-25 07:54:42,518 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-03-25 07:54:42,520 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-03-25 07:54:42,520 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-03-25 07:54:42,521 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-03-25 07:54:42,526 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "join_multiple_return_values.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.03 07:54:42" (1/1) ... [2021-03-25 07:54:42,527 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "join_multiple_return_values.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.03 07:54:42" (1/1) ... [2021-03-25 07:54:42,527 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "join_multiple_return_values.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.03 07:54:42" (1/1) ... [2021-03-25 07:54:42,527 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "join_multiple_return_values.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.03 07:54:42" (1/1) ... [2021-03-25 07:54:42,529 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "join_multiple_return_values.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.03 07:54:42" (1/1) ... [2021-03-25 07:54:42,529 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "join_multiple_return_values.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.03 07:54:42" (1/1) ... [2021-03-25 07:54:42,530 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "join_multiple_return_values.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.03 07:54:42" (1/1) ... [2021-03-25 07:54:42,530 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-03-25 07:54:42,531 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-03-25 07:54:42,531 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-03-25 07:54:42,531 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-03-25 07:54:42,532 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "join_multiple_return_values.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.03 07:54:42" (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 [2021-03-25 07:54:42,585 INFO L130 BoogieDeclarations]: Found specification of procedure foo [2021-03-25 07:54:42,586 INFO L138 BoogieDeclarations]: Found implementation of procedure foo [2021-03-25 07:54:42,586 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-03-25 07:54:42,586 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-03-25 07:54:42,587 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-03-25 07:54:42,698 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-03-25 07:54:42,698 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-03-25 07:54:42,700 INFO L202 PluginConnector]: Adding new model join_multiple_return_values.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.03 07:54:42 BoogieIcfgContainer [2021-03-25 07:54:42,700 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-03-25 07:54:42,716 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-03-25 07:54:42,717 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-03-25 07:54:42,719 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-03-25 07:54:42,719 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "join_multiple_return_values.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.03 07:54:42" (1/2) ... [2021-03-25 07:54:42,720 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17d073f9 and model type join_multiple_return_values.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.03 07:54:42, skipping insertion in model container [2021-03-25 07:54:42,720 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "join_multiple_return_values.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.03 07:54:42" (2/2) ... [2021-03-25 07:54:42,721 INFO L111 eAbstractionObserver]: Analyzing ICFG join_multiple_return_values.bpl [2021-03-25 07:54:42,725 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-03-25 07:54:42,728 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-03-25 07:54:42,729 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-03-25 07:54:42,755 WARN L313 ript$VariableManager]: TermVariabe fooThread1of1ForFork0_num not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-25 07:54:42,755 WARN L313 ript$VariableManager]: TermVariabe fooThread1of1ForFork0_num not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-25 07:54:42,756 WARN L313 ript$VariableManager]: TermVariabe fooThread1of1ForFork0_num not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-25 07:54:42,756 WARN L313 ript$VariableManager]: TermVariabe fooThread1of1ForFork0_num not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-25 07:54:42,757 WARN L313 ript$VariableManager]: TermVariabe fooThread1of1ForFork0_num not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-25 07:54:42,758 WARN L313 ript$VariableManager]: TermVariabe fooThread1of1ForFork0_ret not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-25 07:54:42,758 WARN L313 ript$VariableManager]: TermVariabe fooThread1of1ForFork0_num not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-25 07:54:42,758 WARN L313 ript$VariableManager]: TermVariabe fooThread1of1ForFork0_ret not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-25 07:54:42,759 WARN L313 ript$VariableManager]: TermVariabe fooThread1of1ForFork0_ret not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-25 07:54:42,759 WARN L313 ript$VariableManager]: TermVariabe fooThread1of1ForFork0_ret not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-25 07:54:42,759 WARN L313 ript$VariableManager]: TermVariabe fooThread1of1ForFork0_ret_bool not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-25 07:54:42,760 WARN L313 ript$VariableManager]: TermVariabe fooThread1of1ForFork0_ret_bool not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-25 07:54:42,760 WARN L313 ript$VariableManager]: TermVariabe fooThread1of1ForFork0_ret_bool not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-25 07:54:42,761 WARN L313 ript$VariableManager]: TermVariabe fooThread1of1ForFork0_ret_bool not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-25 07:54:42,764 WARN L313 ript$VariableManager]: TermVariabe fooThread1of1ForFork0_ret_bool not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-25 07:54:42,765 WARN L313 ript$VariableManager]: TermVariabe fooThread1of1ForFork0_ret not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-25 07:54:42,773 INFO L149 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2021-03-25 07:54:42,788 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-03-25 07:54:42,821 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-25 07:54:42,821 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-25 07:54:42,821 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-25 07:54:42,821 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-25 07:54:42,821 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-25 07:54:42,821 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-25 07:54:42,821 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-25 07:54:42,821 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-25 07:54:42,831 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 18 places, 15 transitions, 38 flow [2021-03-25 07:54:42,851 INFO L129 PetriNetUnfolder]: 1/14 cut-off events. [2021-03-25 07:54:42,852 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2021-03-25 07:54:42,855 INFO L84 FinitePrefix]: Finished finitePrefix Result has 19 conditions, 14 events. 1/14 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 8 event pairs, 0 based on Foata normal form. 0/12 useless extension candidates. Maximal degree in co-relation 8. Up to 2 conditions per place. [2021-03-25 07:54:42,855 INFO L82 GeneralOperation]: Start removeDead. Operand has 18 places, 15 transitions, 38 flow [2021-03-25 07:54:42,857 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 15 places, 12 transitions, 30 flow [2021-03-25 07:54:42,859 INFO L174 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2021-03-25 07:54:42,866 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 15 places, 12 transitions, 30 flow [2021-03-25 07:54:42,870 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 15 places, 12 transitions, 30 flow [2021-03-25 07:54:42,872 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 15 places, 12 transitions, 30 flow [2021-03-25 07:54:42,878 INFO L129 PetriNetUnfolder]: 1/12 cut-off events. [2021-03-25 07:54:42,878 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2021-03-25 07:54:42,879 INFO L84 FinitePrefix]: Finished finitePrefix Result has 17 conditions, 12 events. 1/12 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 9 event pairs, 0 based on Foata normal form. 0/11 useless extension candidates. Maximal degree in co-relation 8. Up to 2 conditions per place. [2021-03-25 07:54:42,880 INFO L142 LiptonReduction]: Number of co-enabled transitions 14 [2021-03-25 07:54:43,037 INFO L154 LiptonReduction]: Checked pairs total: 6 [2021-03-25 07:54:43,038 INFO L156 LiptonReduction]: Total number of compositions: 7 [2021-03-25 07:54:43,039 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 181 [2021-03-25 07:54:43,045 INFO L129 PetriNetUnfolder]: 0/5 cut-off events. [2021-03-25 07:54:43,046 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2021-03-25 07:54:43,046 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-25 07:54:43,046 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2021-03-25 07:54:43,046 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-25 07:54:43,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-25 07:54:43,050 INFO L82 PathProgramCache]: Analyzing trace with hash 1698882082, now seen corresponding path program 1 times [2021-03-25 07:54:43,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-25 07:54:43,057 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301180041] [2021-03-25 07:54:43,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-25 07:54:43,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-25 07:54:43,190 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 07:54:43,193 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 07:54:43,213 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 07:54:43,215 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 07:54:43,238 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 07:54:43,239 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-25 07:54:43,281 INFO L142 QuantifierPusher]: treesize reduction 9, result has 50.0 percent of original size [2021-03-25 07:54:43,281 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-25 07:54:43,292 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-25 07:54:43,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301180041] [2021-03-25 07:54:43,293 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-25 07:54:43,293 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-25 07:54:43,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136670373] [2021-03-25 07:54:43,300 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-25 07:54:43,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-25 07:54:43,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-25 07:54:43,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-03-25 07:54:43,325 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2021-03-25 07:54:43,326 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 10 places, 6 transitions, 18 flow. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 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) [2021-03-25 07:54:43,326 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-25 07:54:43,327 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2021-03-25 07:54:43,327 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-25 07:54:43,396 INFO L129 PetriNetUnfolder]: 1/7 cut-off events. [2021-03-25 07:54:43,396 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2021-03-25 07:54:43,396 INFO L84 FinitePrefix]: Finished finitePrefix Result has 20 conditions, 7 events. 1/7 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 3 event pairs, 0 based on Foata normal form. 1/8 useless extension candidates. Maximal degree in co-relation 8. Up to 2 conditions per place. [2021-03-25 07:54:43,397 INFO L132 encePairwiseOnDemand]: 16/22 looper letters, 0 selfloop transitions, 0 changer transitions 7/7 dead transitions. [2021-03-25 07:54:43,397 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 16 places, 7 transitions, 34 flow [2021-03-25 07:54:43,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-25 07:54:43,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-03-25 07:54:43,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 32 transitions. [2021-03-25 07:54:43,415 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.18181818181818182 [2021-03-25 07:54:43,415 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 32 transitions. [2021-03-25 07:54:43,416 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 32 transitions. [2021-03-25 07:54:43,417 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-25 07:54:43,419 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 32 transitions. [2021-03-25 07:54:43,421 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 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) [2021-03-25 07:54:43,426 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 22.0) internal successors, (198), 9 states have internal predecessors, (198), 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) [2021-03-25 07:54:43,426 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 22.0) internal successors, (198), 9 states have internal predecessors, (198), 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) [2021-03-25 07:54:43,427 INFO L185 Difference]: Start difference. First operand has 10 places, 6 transitions, 18 flow. Second operand 8 states and 32 transitions. [2021-03-25 07:54:43,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 16 places, 7 transitions, 34 flow [2021-03-25 07:54:43,430 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 14 places, 7 transitions, 30 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-03-25 07:54:43,431 INFO L241 Difference]: Finished difference. Result has 14 places, 0 transitions, 0 flow [2021-03-25 07:54:43,432 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=12, PETRI_DIFFERENCE_MINUEND_PLACES=7, 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=8, PETRI_FLOW=0, PETRI_PLACES=14, PETRI_TRANSITIONS=0} [2021-03-25 07:54:43,433 INFO L343 CegarLoopForPetriNet]: 10 programPoint places, 4 predicate places. [2021-03-25 07:54:43,433 INFO L174 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2021-03-25 07:54:43,433 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 14 places, 0 transitions, 0 flow [2021-03-25 07:54:43,434 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 14 places, 0 transitions, 0 flow [2021-03-25 07:54:43,434 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 0 places, 0 transitions, 0 flow [2021-03-25 07:54:43,434 INFO L129 PetriNetUnfolder]: 0/0 cut-off events. [2021-03-25 07:54:43,434 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-25 07:54:43,434 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. [2021-03-25 07:54:43,435 INFO L142 LiptonReduction]: Number of co-enabled transitions 0 [2021-03-25 07:54:43,435 INFO L154 LiptonReduction]: Checked pairs total: 0 [2021-03-25 07:54:43,435 INFO L156 LiptonReduction]: Total number of compositions: 0 [2021-03-25 07:54:43,435 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 2 [2021-03-25 07:54:43,436 INFO L480 AbstractCegarLoop]: Abstraction has has 0 places, 0 transitions, 0 flow [2021-03-25 07:54:43,436 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 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) [2021-03-25 07:54:43,436 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-03-25 07:54:43,440 INFO L202 PluginConnector]: Adding new model join_multiple_return_values.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.03 07:54:43 BasicIcfg [2021-03-25 07:54:43,440 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-03-25 07:54:43,441 INFO L168 Benchmark]: Toolchain (without parser) took 943.82 ms. Allocated memory was 255.9 MB in the beginning and 352.3 MB in the end (delta: 96.5 MB). Free memory was 236.7 MB in the beginning and 334.0 MB in the end (delta: -97.3 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-25 07:54:43,441 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.45 ms. Allocated memory is still 255.9 MB. Free memory is still 237.7 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-03-25 07:54:43,442 INFO L168 Benchmark]: Boogie Procedure Inliner took 20.72 ms. Allocated memory is still 255.9 MB. Free memory was 236.7 MB in the beginning and 235.2 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-25 07:54:43,442 INFO L168 Benchmark]: Boogie Preprocessor took 10.68 ms. Allocated memory is still 255.9 MB. Free memory was 235.2 MB in the beginning and 234.3 MB in the end (delta: 870.2 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-25 07:54:43,443 INFO L168 Benchmark]: RCFGBuilder took 169.54 ms. Allocated memory is still 255.9 MB. Free memory was 234.3 MB in the beginning and 225.6 MB in the end (delta: 8.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.0 GB. [2021-03-25 07:54:43,444 INFO L168 Benchmark]: TraceAbstraction took 723.59 ms. Allocated memory was 255.9 MB in the beginning and 352.3 MB in the end (delta: 96.5 MB). Free memory was 241.0 MB in the beginning and 334.0 MB in the end (delta: -93.0 MB). Peak memory consumption was 2.3 MB. Max. memory is 16.0 GB. [2021-03-25 07:54:43,446 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 0.45 ms. Allocated memory is still 255.9 MB. Free memory is still 237.7 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 20.72 ms. Allocated memory is still 255.9 MB. Free memory was 236.7 MB in the beginning and 235.2 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 10.68 ms. Allocated memory is still 255.9 MB. Free memory was 235.2 MB in the beginning and 234.3 MB in the end (delta: 870.2 kB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 169.54 ms. Allocated memory is still 255.9 MB. Free memory was 234.3 MB in the beginning and 225.6 MB in the end (delta: 8.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.0 GB. * TraceAbstraction took 723.59 ms. Allocated memory was 255.9 MB in the beginning and 352.3 MB in the end (delta: 96.5 MB). Free memory was 241.0 MB in the beginning and 334.0 MB in the end (delta: -93.0 MB). Peak memory consumption was 2.3 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 167.5ms, 15 PlacesBefore, 10 PlacesAfterwards, 12 TransitionsBefore, 6 TransitionsAfterwards, 14 CoEnabledTransitionPairs, 3 FixpointIterations, 0 TrivialSequentialCompositions, 4 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 2 ConcurrentYvCompositions, 1 ChoiceCompositions, 7 TotalNumberOfCompositions, 6 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 6, positive: 6, positive conditional: 0, positive unconditional: 6, 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: 6, positive: 6, positive conditional: 0, positive unconditional: 6, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 6, positive: 6, positive conditional: 0, positive unconditional: 6, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 6, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 6, unknown conditional: 0, unknown unconditional: 6] , Statistics on independence cache: Total cache size (in pairs): 0, Positive cache size: 0, Positive conditional cache size: 0, Positive unconditional cache size: 0, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 1.2ms, 14 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: 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] , 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): 0, Positive cache size: 0, Positive conditional cache size: 0, Positive unconditional cache size: 0, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0 - PositiveResult [Line: 23]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 15 locations, 1 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 2.3ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: SAFE, OverallTime: 625.5ms, OverallIterations: 1, TraceHistogramMax: 1, EmptinessCheckTime: 0.0ms, AutomataDifference: 113.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 221.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 3 SDtfs, 7 SDslu, 3 SDs, 0 SdLazy, 10 SolverSat, 1 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 8.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 8 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 128.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=18occurred in iteration=0, InterpolantAutomatonStates: 8, 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: 6.0ms SsaConstructionTime, 23.4ms SatisfiabilityAnalysisTime, 155.8ms InterpolantComputationTime, 6 NumberOfCodeBlocks, 6 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 5 ConstructedInterpolants, 0 QuantifiedInterpolants, 41 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...