/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/ThreadIdListTest-Safe.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-d5b4239aa45c8d22a30959944f2ef622f7386a6d-d5b4239 [2021-03-25 07:54:19,895 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-03-25 07:54:19,896 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-03-25 07:54:19,930 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-03-25 07:54:19,930 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-03-25 07:54:19,933 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-03-25 07:54:19,936 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-03-25 07:54:19,942 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-03-25 07:54:19,944 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-03-25 07:54:19,947 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-03-25 07:54:19,948 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-03-25 07:54:19,949 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2021-03-25 07:54:19,985 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-03-25 07:54:19,986 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-03-25 07:54:19,986 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-03-25 07:54:19,987 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 07:54:20,026 INFO L113 SettingsManager]: Loading preferences was successful [2021-03-25 07:54:20,026 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-03-25 07:54:20,029 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-03-25 07:54:20,029 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-03-25 07:54:20,029 INFO L138 SettingsManager]: * Use SBE=true [2021-03-25 07:54:20,029 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-03-25 07:54:20,029 INFO L138 SettingsManager]: * sizeof long=4 [2021-03-25 07:54:20,030 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-03-25 07:54:20,030 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-03-25 07:54:20,030 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-03-25 07:54:20,031 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-03-25 07:54:20,031 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-03-25 07:54:20,031 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-03-25 07:54:20,031 INFO L138 SettingsManager]: * sizeof long double=12 [2021-03-25 07:54:20,031 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-03-25 07:54:20,031 INFO L138 SettingsManager]: * Use constant arrays=true [2021-03-25 07:54:20,032 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-03-25 07:54:20,032 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-03-25 07:54:20,032 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-03-25 07:54:20,032 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-03-25 07:54:20,032 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-03-25 07:54:20,033 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-25 07:54:20,033 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-03-25 07:54:20,033 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-03-25 07:54:20,033 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-03-25 07:54:20,033 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-03-25 07:54:20,033 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-03-25 07:54:20,033 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=VARIABLE_BASED_MOVER_CHECK [2021-03-25 07:54:20,034 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-03-25 07:54:20,034 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-03-25 07:54:20,034 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-03-25 07:54:20,315 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-03-25 07:54:20,333 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-03-25 07:54:20,335 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-03-25 07:54:20,336 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-03-25 07:54:20,337 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-03-25 07:54:20,338 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/regression/ThreadIdListTest-Safe.bpl [2021-03-25 07:54:20,338 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/regression/ThreadIdListTest-Safe.bpl' [2021-03-25 07:54:20,373 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-03-25 07:54:20,374 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-03-25 07:54:20,376 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-03-25 07:54:20,376 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-03-25 07:54:20,376 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-03-25 07:54:20,386 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "ThreadIdListTest-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.03 07:54:20" (1/1) ... [2021-03-25 07:54:20,391 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "ThreadIdListTest-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.03 07:54:20" (1/1) ... [2021-03-25 07:54:20,398 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-03-25 07:54:20,400 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-03-25 07:54:20,400 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-03-25 07:54:20,400 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-03-25 07:54:20,407 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "ThreadIdListTest-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.03 07:54:20" (1/1) ... [2021-03-25 07:54:20,407 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "ThreadIdListTest-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.03 07:54:20" (1/1) ... [2021-03-25 07:54:20,408 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "ThreadIdListTest-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.03 07:54:20" (1/1) ... [2021-03-25 07:54:20,408 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "ThreadIdListTest-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.03 07:54:20" (1/1) ... [2021-03-25 07:54:20,409 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "ThreadIdListTest-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.03 07:54:20" (1/1) ... [2021-03-25 07:54:20,410 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "ThreadIdListTest-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.03 07:54:20" (1/1) ... [2021-03-25 07:54:20,410 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "ThreadIdListTest-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.03 07:54:20" (1/1) ... [2021-03-25 07:54:20,411 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-03-25 07:54:20,412 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-03-25 07:54:20,412 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-03-25 07:54:20,412 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-03-25 07:54:20,413 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "ThreadIdListTest-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.03 07:54:20" (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 07:54:20,470 INFO L130 BoogieDeclarations]: Found specification of procedure decrement [2021-03-25 07:54:20,470 INFO L138 BoogieDeclarations]: Found implementation of procedure decrement [2021-03-25 07:54:20,471 INFO L130 BoogieDeclarations]: Found specification of procedure increment [2021-03-25 07:54:20,471 INFO L138 BoogieDeclarations]: Found implementation of procedure increment [2021-03-25 07:54:20,471 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-03-25 07:54:20,471 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-03-25 07:54:20,472 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 07:54:20,559 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-03-25 07:54:20,559 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-03-25 07:54:20,560 INFO L202 PluginConnector]: Adding new model ThreadIdListTest-Safe.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.03 07:54:20 BoogieIcfgContainer [2021-03-25 07:54:20,560 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-03-25 07:54:20,562 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-03-25 07:54:20,562 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-03-25 07:54:20,581 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-03-25 07:54:20,581 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "ThreadIdListTest-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.03 07:54:20" (1/2) ... [2021-03-25 07:54:20,582 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5277f9ab and model type ThreadIdListTest-Safe.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.03 07:54:20, skipping insertion in model container [2021-03-25 07:54:20,582 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "ThreadIdListTest-Safe.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.03 07:54:20" (2/2) ... [2021-03-25 07:54:20,584 INFO L111 eAbstractionObserver]: Analyzing ICFG ThreadIdListTest-Safe.bpl [2021-03-25 07:54:20,589 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-03-25 07:54:20,592 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-03-25 07:54:20,592 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-03-25 07:54:20,612 WARN L313 ript$VariableManager]: TermVariabe decrementThread1of1ForFork1_n not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-25 07:54:20,612 WARN L313 ript$VariableManager]: TermVariabe decrementThread1of1ForFork1_res not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-25 07:54:20,613 WARN L313 ript$VariableManager]: TermVariabe decrementThread1of1ForFork1_n not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-25 07:54:20,613 WARN L313 ript$VariableManager]: TermVariabe decrementThread1of1ForFork1_res not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-25 07:54:20,613 WARN L313 ript$VariableManager]: TermVariabe incrementThread1of1ForFork0_n not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-25 07:54:20,613 WARN L313 ript$VariableManager]: TermVariabe incrementThread1of1ForFork0_res not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-25 07:54:20,614 WARN L313 ript$VariableManager]: TermVariabe incrementThread1of1ForFork0_n not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-25 07:54:20,614 WARN L313 ript$VariableManager]: TermVariabe incrementThread1of1ForFork0_res not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-25 07:54:20,616 WARN L313 ript$VariableManager]: TermVariabe incrementThread1of1ForFork0_res not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-25 07:54:20,619 WARN L313 ript$VariableManager]: TermVariabe decrementThread1of1ForFork1_res not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-25 07:54:20,623 INFO L149 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2021-03-25 07:54:20,637 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-03-25 07:54:20,655 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-25 07:54:20,655 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-25 07:54:20,655 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-25 07:54:20,655 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-25 07:54:20,655 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-25 07:54:20,655 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-25 07:54:20,656 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-25 07:54:20,656 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-25 07:54:20,663 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 20 places, 13 transitions, 39 flow [2021-03-25 07:54:20,677 INFO L129 PetriNetUnfolder]: 0/11 cut-off events. [2021-03-25 07:54:20,677 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2021-03-25 07:54:20,679 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. [2021-03-25 07:54:20,679 INFO L82 GeneralOperation]: Start removeDead. Operand has 20 places, 13 transitions, 39 flow [2021-03-25 07:54:20,682 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 16 places, 9 transitions, 27 flow [2021-03-25 07:54:20,683 INFO L174 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2021-03-25 07:54:20,690 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 16 places, 9 transitions, 27 flow [2021-03-25 07:54:20,693 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 16 places, 9 transitions, 27 flow [2021-03-25 07:54:20,693 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 16 places, 9 transitions, 27 flow [2021-03-25 07:54:20,697 INFO L129 PetriNetUnfolder]: 0/9 cut-off events. [2021-03-25 07:54:20,697 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2021-03-25 07:54:20,697 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. [2021-03-25 07:54:20,699 INFO L142 LiptonReduction]: Number of co-enabled transitions 20 [2021-03-25 07:54:20,726 INFO L154 LiptonReduction]: Checked pairs total: 7 [2021-03-25 07:54:20,726 INFO L156 LiptonReduction]: Total number of compositions: 2 [2021-03-25 07:54:20,728 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 46 [2021-03-25 07:54:20,735 INFO L129 PetriNetUnfolder]: 0/6 cut-off events. [2021-03-25 07:54:20,735 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2021-03-25 07:54:20,735 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-25 07:54:20,736 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2021-03-25 07:54:20,736 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-25 07:54:20,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-25 07:54:20,740 INFO L82 PathProgramCache]: Analyzing trace with hash 1428659103, now seen corresponding path program 1 times [2021-03-25 07:54:20,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-25 07:54:20,746 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804114581] [2021-03-25 07:54:20,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-25 07:54:20,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-25 07:54:20,834 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 07:54:20,834 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-25 07:54:20,840 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 07:54:20,840 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-25 07:54:20,847 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 07:54:20,847 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-25 07:54:20,848 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 07:54:20,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804114581] [2021-03-25 07:54:20,849 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-25 07:54:20,849 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-25 07:54:20,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253495755] [2021-03-25 07:54:20,856 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-25 07:54:20,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-25 07:54:20,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-25 07:54:20,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-25 07:54:20,884 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 15 [2021-03-25 07:54:20,885 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) [2021-03-25 07:54:20,885 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-25 07:54:20,886 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 15 [2021-03-25 07:54:20,886 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-25 07:54:20,891 INFO L129 PetriNetUnfolder]: 0/5 cut-off events. [2021-03-25 07:54:20,891 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2021-03-25 07:54:20,891 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. [2021-03-25 07:54:20,892 INFO L132 encePairwiseOnDemand]: 13/15 looper letters, 0 selfloop transitions, 0 changer transitions 5/5 dead transitions. [2021-03-25 07:54:20,892 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 14 places, 5 transitions, 18 flow [2021-03-25 07:54:20,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-25 07:54:20,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-03-25 07:54:20,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 38 transitions. [2021-03-25 07:54:20,917 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.8444444444444444 [2021-03-25 07:54:20,918 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 38 transitions. [2021-03-25 07:54:20,919 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 38 transitions. [2021-03-25 07:54:20,919 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-25 07:54:20,921 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 38 transitions. [2021-03-25 07:54:20,922 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) [2021-03-25 07:54:20,933 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) [2021-03-25 07:54:20,933 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) [2021-03-25 07:54:20,934 INFO L185 Difference]: Start difference. First operand has 14 places, 7 transitions, 23 flow. Second operand 3 states and 38 transitions. [2021-03-25 07:54:20,935 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 14 places, 5 transitions, 18 flow [2021-03-25 07:54:20,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 12 places, 5 transitions, 16 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-03-25 07:54:20,939 INFO L241 Difference]: Finished difference. Result has 12 places, 0 transitions, 0 flow [2021-03-25 07:54:20,940 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} [2021-03-25 07:54:20,941 INFO L343 CegarLoopForPetriNet]: 14 programPoint places, -2 predicate places. [2021-03-25 07:54:20,941 INFO L174 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2021-03-25 07:54:20,941 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 12 places, 0 transitions, 0 flow [2021-03-25 07:54:20,943 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 12 places, 0 transitions, 0 flow [2021-03-25 07:54:20,943 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 0 places, 0 transitions, 0 flow [2021-03-25 07:54:20,943 INFO L129 PetriNetUnfolder]: 0/0 cut-off events. [2021-03-25 07:54:20,943 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-25 07:54:20,943 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 07:54:20,943 INFO L142 LiptonReduction]: Number of co-enabled transitions 0 [2021-03-25 07:54:20,944 INFO L154 LiptonReduction]: Checked pairs total: 0 [2021-03-25 07:54:20,945 INFO L156 LiptonReduction]: Total number of compositions: 0 [2021-03-25 07:54:20,945 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 4 [2021-03-25 07:54:20,947 INFO L480 AbstractCegarLoop]: Abstraction has has 0 places, 0 transitions, 0 flow [2021-03-25 07:54:20,947 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) [2021-03-25 07:54:20,948 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-03-25 07:54:20,951 INFO L202 PluginConnector]: Adding new model ThreadIdListTest-Safe.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.03 07:54:20 BasicIcfg [2021-03-25 07:54:20,951 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-03-25 07:54:20,954 INFO L168 Benchmark]: Toolchain (without parser) took 578.07 ms. Allocated memory is still 255.9 MB. Free memory was 236.6 MB in the beginning and 216.5 MB in the end (delta: 20.2 MB). Peak memory consumption was 21.7 MB. Max. memory is 16.0 GB. [2021-03-25 07:54:20,954 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.56 ms. Allocated memory is still 255.9 MB. Free memory is still 237.6 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-03-25 07:54:20,955 INFO L168 Benchmark]: Boogie Procedure Inliner took 23.23 ms. Allocated memory is still 255.9 MB. Free memory was 236.5 MB in the beginning and 235.1 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-25 07:54:20,956 INFO L168 Benchmark]: Boogie Preprocessor took 11.22 ms. Allocated memory is still 255.9 MB. Free memory was 235.1 MB in the beginning and 234.2 MB in the end (delta: 841.5 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-25 07:54:20,957 INFO L168 Benchmark]: RCFGBuilder took 148.78 ms. Allocated memory is still 255.9 MB. Free memory was 234.1 MB in the beginning and 226.2 MB in the end (delta: 8.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.0 GB. [2021-03-25 07:54:20,958 INFO L168 Benchmark]: TraceAbstraction took 389.90 ms. Allocated memory is still 255.9 MB. Free memory was 225.7 MB in the beginning and 216.5 MB in the end (delta: 9.2 MB). Peak memory consumption was 11.2 MB. Max. memory is 16.0 GB. [2021-03-25 07:54:20,964 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 0.56 ms. Allocated memory is still 255.9 MB. Free memory is still 237.6 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 23.23 ms. Allocated memory is still 255.9 MB. Free memory was 236.5 MB in the beginning and 235.1 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 11.22 ms. Allocated memory is still 255.9 MB. Free memory was 235.1 MB in the beginning and 234.2 MB in the end (delta: 841.5 kB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 148.78 ms. Allocated memory is still 255.9 MB. Free memory was 234.1 MB in the beginning and 226.2 MB in the end (delta: 8.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.0 GB. * TraceAbstraction took 389.90 ms. Allocated memory is still 255.9 MB. Free memory was 225.7 MB in the beginning and 216.5 MB in the end (delta: 9.2 MB). Peak memory consumption was 11.2 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 33.7ms, 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: 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: 7, positive: 1, positive conditional: 0, positive unconditional: 1, 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: 1.9ms, 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: 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: 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: 3.1ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: SAFE, OverallTime: 296.8ms, OverallIterations: 1, TraceHistogramMax: 1, EmptinessCheckTime: 0.0ms, AutomataDifference: 77.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 76.0ms, 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: 3.1ms SsaConstructionTime, 12.1ms SatisfiabilityAnalysisTime, 41.1ms 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...