/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/BuchiAutomizerBplInline.xml -s ../../../trunk/examples/settings/buchiAutomizer/concurrent-automaton-semanticLbe.epf -i ../../../trunk/examples/concurrent/bpl/concurrent_increment_nonterminating.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.fs.omega-petrinet-ed1a3e5-m [2022-09-29 14:47:43,814 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-09-29 14:47:43,816 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-09-29 14:47:43,839 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-09-29 14:47:43,839 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-09-29 14:47:43,841 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-09-29 14:47:43,845 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-09-29 14:47:43,849 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-09-29 14:47:43,851 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-09-29 14:47:43,856 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-09-29 14:47:43,858 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-09-29 14:47:43,859 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2022-09-29 14:47:43,878 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-09-29 14:47:43,879 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-09-29 14:47:43,879 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-09-29 14:47:43,883 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/buchiAutomizer/concurrent-automaton-semanticLbe.epf [2022-09-29 14:47:43,908 INFO L113 SettingsManager]: Loading preferences was successful [2022-09-29 14:47:43,908 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-09-29 14:47:43,908 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-09-29 14:47:43,908 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-09-29 14:47:43,909 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-09-29 14:47:43,909 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-09-29 14:47:43,909 INFO L138 SettingsManager]: * Use SBE=true [2022-09-29 14:47:43,909 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2022-09-29 14:47:43,909 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2022-09-29 14:47:43,909 INFO L138 SettingsManager]: * Use old map elimination=false [2022-09-29 14:47:43,909 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2022-09-29 14:47:43,909 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2022-09-29 14:47:43,910 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2022-09-29 14:47:43,910 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-09-29 14:47:43,910 INFO L138 SettingsManager]: * sizeof long=4 [2022-09-29 14:47:43,910 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-09-29 14:47:43,910 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-09-29 14:47:43,910 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-09-29 14:47:43,910 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-09-29 14:47:43,910 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2022-09-29 14:47:43,910 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2022-09-29 14:47:43,910 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2022-09-29 14:47:43,911 INFO L138 SettingsManager]: * sizeof long double=12 [2022-09-29 14:47:43,911 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-09-29 14:47:43,911 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2022-09-29 14:47:43,911 INFO L138 SettingsManager]: * Use constant arrays=true [2022-09-29 14:47:43,911 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2022-09-29 14:47:43,911 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-09-29 14:47:43,911 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-09-29 14:47:43,911 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-09-29 14:47:43,911 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-09-29 14:47:43,912 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-09-29 14:47:43,912 INFO L138 SettingsManager]: * TransformationType=MODULO_NEIGHBOR 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-09-29 14:47:44,098 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-09-29 14:47:44,122 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-09-29 14:47:44,124 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-09-29 14:47:44,124 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-09-29 14:47:44,125 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-09-29 14:47:44,126 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/concurrent_increment_nonterminating.bpl [2022-09-29 14:47:44,126 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/concurrent_increment_nonterminating.bpl' [2022-09-29 14:47:44,144 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-09-29 14:47:44,145 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-09-29 14:47:44,146 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-09-29 14:47:44,146 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-09-29 14:47:44,146 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-09-29 14:47:44,154 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "concurrent_increment_nonterminating.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 29.09 02:47:44" (1/1) ... [2022-09-29 14:47:44,159 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "concurrent_increment_nonterminating.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 29.09 02:47:44" (1/1) ... [2022-09-29 14:47:44,163 INFO L137 Inliner]: procedures = 3, calls = 2, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-09-29 14:47:44,164 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-09-29 14:47:44,165 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-09-29 14:47:44,165 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-09-29 14:47:44,166 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-09-29 14:47:44,171 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "concurrent_increment_nonterminating.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 29.09 02:47:44" (1/1) ... [2022-09-29 14:47:44,171 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "concurrent_increment_nonterminating.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 29.09 02:47:44" (1/1) ... [2022-09-29 14:47:44,172 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "concurrent_increment_nonterminating.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 29.09 02:47:44" (1/1) ... [2022-09-29 14:47:44,172 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "concurrent_increment_nonterminating.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 29.09 02:47:44" (1/1) ... [2022-09-29 14:47:44,174 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "concurrent_increment_nonterminating.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 29.09 02:47:44" (1/1) ... [2022-09-29 14:47:44,176 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "concurrent_increment_nonterminating.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 29.09 02:47:44" (1/1) ... [2022-09-29 14:47:44,176 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "concurrent_increment_nonterminating.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 29.09 02:47:44" (1/1) ... [2022-09-29 14:47:44,177 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-09-29 14:47:44,178 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-09-29 14:47:44,178 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-09-29 14:47:44,179 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-09-29 14:47:44,180 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "concurrent_increment_nonterminating.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 29.09 02:47:44" (1/1) ... [2022-09-29 14:47:44,184 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-09-29 14:47:44,189 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-29 14:47:44,200 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-09-29 14:47:44,202 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Waiting until timeout for monitored process [2022-09-29 14:47:44,236 INFO L124 BoogieDeclarations]: Specification and implementation of procedure dec given in one single declaration [2022-09-29 14:47:44,236 INFO L130 BoogieDeclarations]: Found specification of procedure dec [2022-09-29 14:47:44,236 INFO L138 BoogieDeclarations]: Found implementation of procedure dec [2022-09-29 14:47:44,236 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-09-29 14:47:44,237 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-09-29 14:47:44,237 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-09-29 14:47:44,237 INFO L124 BoogieDeclarations]: Specification and implementation of procedure inc given in one single declaration [2022-09-29 14:47:44,237 INFO L130 BoogieDeclarations]: Found specification of procedure inc [2022-09-29 14:47:44,237 INFO L138 BoogieDeclarations]: Found implementation of procedure inc [2022-09-29 14:47:44,238 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-09-29 14:47:44,268 INFO L234 CfgBuilder]: Building ICFG [2022-09-29 14:47:44,269 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-09-29 14:47:44,337 INFO L275 CfgBuilder]: Performing block encoding [2022-09-29 14:47:44,341 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-09-29 14:47:44,341 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-09-29 14:47:44,343 INFO L202 PluginConnector]: Adding new model concurrent_increment_nonterminating.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.09 02:47:44 BoogieIcfgContainer [2022-09-29 14:47:44,343 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-09-29 14:47:44,344 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2022-09-29 14:47:44,344 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2022-09-29 14:47:44,346 INFO L275 PluginConnector]: BuchiAutomizer initialized [2022-09-29 14:47:44,347 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2022-09-29 14:47:44,347 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "concurrent_increment_nonterminating.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 29.09 02:47:44" (1/2) ... [2022-09-29 14:47:44,348 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@5e2a0e6d and model type concurrent_increment_nonterminating.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 29.09 02:47:44, skipping insertion in model container [2022-09-29 14:47:44,348 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2022-09-29 14:47:44,348 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "concurrent_increment_nonterminating.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.09 02:47:44" (2/2) ... [2022-09-29 14:47:44,349 INFO L322 chiAutomizerObserver]: Analyzing ICFG concurrent_increment_nonterminating.bpl [2022-09-29 14:47:44,382 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-09-29 14:47:44,401 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 21 places, 18 transitions, 52 flow [2022-09-29 14:47:44,413 INFO L175 PetriNetUnfolderBase]: Searched whole Unfolding. [2022-09-29 14:47:44,414 INFO L123 PetriNetUnfolderBase]: 2/14 cut-off events. [2022-09-29 14:47:44,414 INFO L124 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2022-09-29 14:47:44,416 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23 conditions, 14 events. 2/14 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 11 event pairs, 0 based on Foata normal form. 0/12 useless extension candidates. Maximal degree in co-relation 11. Up to 2 conditions per place. [2022-09-29 14:47:44,416 INFO L82 GeneralOperation]: Start removeDead. Operand has 21 places, 18 transitions, 52 flow [2022-09-29 14:47:44,420 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 19 places, 14 transitions, 40 flow [2022-09-29 14:47:44,422 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-09-29 14:47:44,441 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 19 places, 14 transitions, 40 flow [2022-09-29 14:47:44,446 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 19 places, 14 transitions, 40 flow [2022-09-29 14:47:44,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 19 places, 14 transitions, 40 flow [2022-09-29 14:47:44,454 INFO L175 PetriNetUnfolderBase]: Searched whole Unfolding. [2022-09-29 14:47:44,454 INFO L123 PetriNetUnfolderBase]: 2/14 cut-off events. [2022-09-29 14:47:44,454 INFO L124 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2022-09-29 14:47:44,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23 conditions, 14 events. 2/14 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 16 event pairs, 0 based on Foata normal form. 0/12 useless extension candidates. Maximal degree in co-relation 11. Up to 2 conditions per place. [2022-09-29 14:47:44,455 INFO L116 LiptonReduction]: Number of co-enabled transitions 48 [2022-09-29 14:47:44,589 INFO L131 LiptonReduction]: Checked pairs total: 43 [2022-09-29 14:47:44,589 INFO L133 LiptonReduction]: Total number of compositions: 4 [2022-09-29 14:47:44,602 INFO L303 stractBuchiCegarLoop]: Interprodecural is true [2022-09-29 14:47:44,602 INFO L304 stractBuchiCegarLoop]: Hoare is false [2022-09-29 14:47:44,603 INFO L305 stractBuchiCegarLoop]: Compute interpolants for ForwardPredicates [2022-09-29 14:47:44,603 INFO L306 stractBuchiCegarLoop]: Backedges is STRAIGHT_LINE [2022-09-29 14:47:44,603 INFO L307 stractBuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2022-09-29 14:47:44,603 INFO L308 stractBuchiCegarLoop]: Difference is false [2022-09-29 14:47:44,603 INFO L309 stractBuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2022-09-29 14:47:44,618 INFO L313 stractBuchiCegarLoop]: ======== Iteration 0 == of CEGAR loop == BuchiAutomatonCegarLoop ======== [2022-09-29 14:47:44,620 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand currently 0 states, but on-demand construction may add more states [2022-09-29 14:47:44,636 INFO L131 ngComponentsAnalysis]: Automaton has 5 accepting balls. 5 [2022-09-29 14:47:44,637 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2022-09-29 14:47:44,637 INFO L119 BuchiIsEmpty]: Starting construction of run [2022-09-29 14:47:44,640 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1] [2022-09-29 14:47:44,641 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1] [2022-09-29 14:47:44,641 INFO L335 stractBuchiCegarLoop]: ======== Iteration 1 ============ [2022-09-29 14:47:44,641 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand currently 11 states, but on-demand construction may add more states [2022-09-29 14:47:44,643 INFO L131 ngComponentsAnalysis]: Automaton has 5 accepting balls. 5 [2022-09-29 14:47:44,643 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2022-09-29 14:47:44,643 INFO L119 BuchiIsEmpty]: Starting construction of run [2022-09-29 14:47:44,643 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1] [2022-09-29 14:47:44,643 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1] [2022-09-29 14:47:44,646 INFO L733 eck$LassoCheckResult]: Stem: 24#[ULTIMATE.startENTRY]don't care [21] ULTIMATE.startENTRY-->L15: Formula: (= v_x_5 0) InVars {} OutVars{x=v_x_5} AuxVars[] AssignedVars[x] 27#[L15]don't care [44] L15-->L24: Formula: (= v_incThread1of1ForFork0_thidvar0_2 1) InVars {} OutVars{incThread1of1ForFork0_thidvar0=v_incThread1of1ForFork0_thidvar0_2} AuxVars[] AssignedVars[incThread1of1ForFork0_thidvar0] 29#[L15-1, L24]don't care [2022-09-29 14:47:44,647 INFO L735 eck$LassoCheckResult]: Loop: 29#[L15-1, L24]don't care [53] L24-->L24: Formula: (and (< v_x_35 v_n_9) (= v_x_34 (+ v_x_35 1))) InVars {n=v_n_9, x=v_x_35} OutVars{n=v_n_9, x=v_x_34} AuxVars[] AssignedVars[x] 29#[L15-1, L24]don't care [2022-09-29 14:47:44,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-29 14:47:44,650 INFO L85 PathProgramCache]: Analyzing trace with hash 1656, now seen corresponding path program 1 times [2022-09-29 14:47:44,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-29 14:47:44,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356198066] [2022-09-29 14:47:44,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-29 14:47:44,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-29 14:47:44,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-09-29 14:47:44,717 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-09-29 14:47:44,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-09-29 14:47:44,729 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-09-29 14:47:44,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-29 14:47:44,731 INFO L85 PathProgramCache]: Analyzing trace with hash 84, now seen corresponding path program 1 times [2022-09-29 14:47:44,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-29 14:47:44,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911457730] [2022-09-29 14:47:44,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-29 14:47:44,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-29 14:47:44,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-09-29 14:47:44,738 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-09-29 14:47:44,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-09-29 14:47:44,741 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-09-29 14:47:44,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-29 14:47:44,743 INFO L85 PathProgramCache]: Analyzing trace with hash 51389, now seen corresponding path program 1 times [2022-09-29 14:47:44,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-29 14:47:44,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380676872] [2022-09-29 14:47:44,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-29 14:47:44,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-29 14:47:44,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-09-29 14:47:44,748 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-09-29 14:47:44,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-09-29 14:47:44,752 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-09-29 14:47:44,786 INFO L210 LassoAnalysis]: Preferences: [2022-09-29 14:47:44,787 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-09-29 14:47:44,787 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-09-29 14:47:44,787 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-09-29 14:47:44,787 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2022-09-29 14:47:44,787 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-09-29 14:47:44,787 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-09-29 14:47:44,788 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-09-29 14:47:44,788 INFO L133 ssoRankerPreferences]: Filename of dumped script: concurrent_increment_nonterminating.bpl_BEv2_Iteration1_Loop [2022-09-29 14:47:44,788 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-09-29 14:47:44,788 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-09-29 14:47:44,841 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-09-29 14:47:44,881 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-09-29 14:47:44,882 INFO L404 LassoAnalysis]: Checking for nontermination... [2022-09-29 14:47:44,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-09-29 14:47:44,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-29 14:47:44,884 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-09-29 14:47:44,886 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Waiting until timeout for monitored process [2022-09-29 14:47:44,892 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-09-29 14:47:44,892 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-09-29 14:47:44,930 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Forceful destruction successful, exit code 0 [2022-09-29 14:47:44,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-09-29 14:47:44,931 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-29 14:47:44,932 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-09-29 14:47:44,980 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Waiting until timeout for monitored process [2022-09-29 14:47:44,981 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2022-09-29 14:47:44,981 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-09-29 14:47:45,123 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2022-09-29 14:47:45,126 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Forceful destruction successful, exit code 0 [2022-09-29 14:47:45,126 INFO L210 LassoAnalysis]: Preferences: [2022-09-29 14:47:45,127 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-09-29 14:47:45,127 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-09-29 14:47:45,127 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-09-29 14:47:45,127 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2022-09-29 14:47:45,127 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-09-29 14:47:45,127 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-09-29 14:47:45,127 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-09-29 14:47:45,127 INFO L133 ssoRankerPreferences]: Filename of dumped script: concurrent_increment_nonterminating.bpl_BEv2_Iteration1_Loop [2022-09-29 14:47:45,127 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-09-29 14:47:45,127 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-09-29 14:47:45,128 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-09-29 14:47:45,169 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-09-29 14:47:45,172 INFO L490 LassoAnalysis]: Using template 'affine'. [2022-09-29 14:47:45,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-09-29 14:47:45,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-29 14:47:45,188 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-09-29 14:47:45,189 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Waiting until timeout for monitored process [2022-09-29 14:47:45,189 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2022-09-29 14:47:45,198 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-09-29 14:47:45,198 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-09-29 14:47:45,199 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-09-29 14:47:45,199 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-09-29 14:47:45,199 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-09-29 14:47:45,202 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-09-29 14:47:45,202 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-09-29 14:47:45,216 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2022-09-29 14:47:45,220 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2022-09-29 14:47:45,220 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 0 variables to zero. [2022-09-29 14:47:45,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-09-29 14:47:45,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-29 14:47:45,236 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-09-29 14:47:45,238 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Waiting until timeout for monitored process [2022-09-29 14:47:45,239 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2022-09-29 14:47:45,239 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2022-09-29 14:47:45,239 INFO L513 LassoAnalysis]: Proved termination. [2022-09-29 14:47:45,240 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(x, n) = -1*x + 1*n Supporting invariants [] [2022-09-29 14:47:45,257 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Forceful destruction successful, exit code 0 [2022-09-29 14:47:45,260 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2022-09-29 14:47:45,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-29 14:47:45,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-29 14:47:45,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 6 conjuncts, 2 conjunts are in the unsatisfiable core [2022-09-29 14:47:45,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-29 14:47:45,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-29 14:47:45,287 WARN L261 TraceCheckSpWp]: Trace formula consists of 5 conjuncts, 4 conjunts are in the unsatisfiable core [2022-09-29 14:47:45,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-29 14:47:45,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-29 14:47:45,304 INFO L141 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 1 loop predicates [2022-09-29 14:47:45,306 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand currently 11 states, but on-demand construction may add more states Second operand has 2 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 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) [2022-09-29 14:47:45,336 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand currently 11 states, but on-demand construction may add more states. Second operand has 2 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 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) Result 36 states and 69 transitions. Complement of second has 5 states. [2022-09-29 14:47:45,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 3 states 1 stem states 1 non-accepting loop states 1 accepting loop states [2022-09-29 14:47:45,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 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) [2022-09-29 14:47:45,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 13 transitions. [2022-09-29 14:47:45,343 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 13 transitions. Stem has 2 letters. Loop has 1 letters. [2022-09-29 14:47:45,343 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-09-29 14:47:45,343 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 13 transitions. Stem has 3 letters. Loop has 1 letters. [2022-09-29 14:47:45,343 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-09-29 14:47:45,343 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 13 transitions. Stem has 2 letters. Loop has 2 letters. [2022-09-29 14:47:45,343 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-09-29 14:47:45,344 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 36 states and 69 transitions. [2022-09-29 14:47:45,346 INFO L131 ngComponentsAnalysis]: Automaton has 4 accepting balls. 4 [2022-09-29 14:47:45,349 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 36 states to 16 states and 34 transitions. [2022-09-29 14:47:45,349 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 9 [2022-09-29 14:47:45,350 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 13 [2022-09-29 14:47:45,350 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 34 transitions. [2022-09-29 14:47:45,350 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2022-09-29 14:47:45,350 INFO L218 hiAutomatonCegarLoop]: Abstraction has 16 states and 34 transitions. [2022-09-29 14:47:45,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states and 34 transitions. [2022-09-29 14:47:45,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 12. [2022-09-29 14:47:45,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 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) [2022-09-29 14:47:45,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 25 transitions. [2022-09-29 14:47:45,366 INFO L240 hiAutomatonCegarLoop]: Abstraction has 12 states and 25 transitions. [2022-09-29 14:47:45,366 INFO L428 stractBuchiCegarLoop]: Abstraction has 12 states and 25 transitions. [2022-09-29 14:47:45,366 INFO L335 stractBuchiCegarLoop]: ======== Iteration 2 ============ [2022-09-29 14:47:45,366 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 12 states and 25 transitions. [2022-09-29 14:47:45,367 INFO L131 ngComponentsAnalysis]: Automaton has 4 accepting balls. 4 [2022-09-29 14:47:45,367 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2022-09-29 14:47:45,367 INFO L119 BuchiIsEmpty]: Starting construction of run [2022-09-29 14:47:45,367 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1, 1] [2022-09-29 14:47:45,367 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1] [2022-09-29 14:47:45,367 INFO L733 eck$LassoCheckResult]: Stem: 117#[ULTIMATE.startENTRY]don't care [21] ULTIMATE.startENTRY-->L15: Formula: (= v_x_5 0) InVars {} OutVars{x=v_x_5} AuxVars[] AssignedVars[x] 119#[L15]don't care [44] L15-->L24: Formula: (= v_incThread1of1ForFork0_thidvar0_2 1) InVars {} OutVars{incThread1of1ForFork0_thidvar0=v_incThread1of1ForFork0_thidvar0_2} AuxVars[] AssignedVars[incThread1of1ForFork0_thidvar0] 125#[L15-1, L24]don't care [52] L24-->incEXIT: Formula: (not (< v_x_28 v_n_5)) InVars {n=v_n_5, x=v_x_28} OutVars{n=v_n_5, x=v_x_28} AuxVars[] AssignedVars[] 121#[L15-1, incEXIT]don't care [47] L15-1-->L32: Formula: (and (= v_decThread1of1ForFork1_thidvar1_2 2) (= v_decThread1of1ForFork1_thidvar0_2 2)) InVars {} OutVars{decThread1of1ForFork1_thidvar0=v_decThread1of1ForFork1_thidvar0_2, decThread1of1ForFork1_thidvar1=v_decThread1of1ForFork1_thidvar1_2} AuxVars[] AssignedVars[decThread1of1ForFork1_thidvar0, decThread1of1ForFork1_thidvar1] 123#[L16, L32, incEXIT]don't care [2022-09-29 14:47:45,368 INFO L735 eck$LassoCheckResult]: Loop: 123#[L16, L32, incEXIT]don't care [51] L32-->L32: Formula: (and (= (+ (- 1) v_x_21) v_x_20) (< 0 v_x_21)) InVars {x=v_x_21} OutVars{x=v_x_20} AuxVars[] AssignedVars[x] 123#[L16, L32, incEXIT]don't care [2022-09-29 14:47:45,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-29 14:47:45,368 INFO L85 PathProgramCache]: Analyzing trace with hash 1593075, now seen corresponding path program 1 times [2022-09-29 14:47:45,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-29 14:47:45,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271268386] [2022-09-29 14:47:45,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-29 14:47:45,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-29 14:47:45,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-09-29 14:47:45,372 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-09-29 14:47:45,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-09-29 14:47:45,375 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-09-29 14:47:45,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-29 14:47:45,375 INFO L85 PathProgramCache]: Analyzing trace with hash 82, now seen corresponding path program 1 times [2022-09-29 14:47:45,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-29 14:47:45,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159434942] [2022-09-29 14:47:45,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-29 14:47:45,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-29 14:47:45,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-09-29 14:47:45,378 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-09-29 14:47:45,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-09-29 14:47:45,379 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-09-29 14:47:45,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-29 14:47:45,380 INFO L85 PathProgramCache]: Analyzing trace with hash 49385376, now seen corresponding path program 1 times [2022-09-29 14:47:45,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-29 14:47:45,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2147258417] [2022-09-29 14:47:45,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-29 14:47:45,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-29 14:47:45,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-29 14:47:45,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-29 14:47:45,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-29 14:47:45,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2147258417] [2022-09-29 14:47:45,402 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2147258417] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-29 14:47:45,402 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-29 14:47:45,402 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-09-29 14:47:45,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723812934] [2022-09-29 14:47:45,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-29 14:47:45,413 INFO L210 LassoAnalysis]: Preferences: [2022-09-29 14:47:45,413 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-09-29 14:47:45,413 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-09-29 14:47:45,413 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-09-29 14:47:45,413 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2022-09-29 14:47:45,413 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-09-29 14:47:45,413 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-09-29 14:47:45,413 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-09-29 14:47:45,413 INFO L133 ssoRankerPreferences]: Filename of dumped script: concurrent_increment_nonterminating.bpl_BEv2_Iteration2_Loop [2022-09-29 14:47:45,413 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-09-29 14:47:45,413 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-09-29 14:47:45,414 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-09-29 14:47:45,427 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-09-29 14:47:45,427 INFO L404 LassoAnalysis]: Checking for nontermination... [2022-09-29 14:47:45,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-09-29 14:47:45,427 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-29 14:47:45,428 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-09-29 14:47:45,429 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Waiting until timeout for monitored process [2022-09-29 14:47:45,431 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-09-29 14:47:45,431 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-09-29 14:47:45,469 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Forceful destruction successful, exit code 0 [2022-09-29 14:47:45,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-09-29 14:47:45,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-29 14:47:45,471 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-09-29 14:47:45,472 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Waiting until timeout for monitored process [2022-09-29 14:47:45,474 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2022-09-29 14:47:45,474 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-09-29 14:47:45,523 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2022-09-29 14:47:45,529 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Forceful destruction successful, exit code 0 [2022-09-29 14:47:45,529 INFO L210 LassoAnalysis]: Preferences: [2022-09-29 14:47:45,529 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-09-29 14:47:45,530 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-09-29 14:47:45,530 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-09-29 14:47:45,530 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2022-09-29 14:47:45,530 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-09-29 14:47:45,530 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-09-29 14:47:45,530 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-09-29 14:47:45,530 INFO L133 ssoRankerPreferences]: Filename of dumped script: concurrent_increment_nonterminating.bpl_BEv2_Iteration2_Loop [2022-09-29 14:47:45,530 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-09-29 14:47:45,530 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-09-29 14:47:45,531 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-09-29 14:47:45,545 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-09-29 14:47:45,545 INFO L490 LassoAnalysis]: Using template 'affine'. [2022-09-29 14:47:45,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-09-29 14:47:45,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-29 14:47:45,551 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-09-29 14:47:45,552 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Waiting until timeout for monitored process [2022-09-29 14:47:45,553 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2022-09-29 14:47:45,559 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-09-29 14:47:45,559 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-09-29 14:47:45,559 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-09-29 14:47:45,560 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-09-29 14:47:45,560 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-09-29 14:47:45,562 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-09-29 14:47:45,562 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-09-29 14:47:45,578 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2022-09-29 14:47:45,588 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2022-09-29 14:47:45,588 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2022-09-29 14:47:45,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-09-29 14:47:45,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-29 14:47:45,620 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-09-29 14:47:45,621 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Waiting until timeout for monitored process [2022-09-29 14:47:45,642 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2022-09-29 14:47:45,642 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2022-09-29 14:47:45,642 INFO L513 LassoAnalysis]: Proved termination. [2022-09-29 14:47:45,642 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(x) = 1*x Supporting invariants [] [2022-09-29 14:47:45,659 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Forceful destruction successful, exit code 0 [2022-09-29 14:47:45,660 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2022-09-29 14:47:45,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-29 14:47:45,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-29 14:47:45,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 11 conjuncts, 2 conjunts are in the unsatisfiable core [2022-09-29 14:47:45,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-29 14:47:45,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-29 14:47:45,696 WARN L261 TraceCheckSpWp]: Trace formula consists of 5 conjuncts, 4 conjunts are in the unsatisfiable core [2022-09-29 14:47:45,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-29 14:47:45,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-29 14:47:45,697 INFO L141 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 1 loop predicates [2022-09-29 14:47:45,697 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 12 states and 25 transitions. cyclomatic complexity: 19 Second operand has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 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) [2022-09-29 14:47:45,717 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 12 states and 25 transitions. cyclomatic complexity: 19. Second operand has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 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) Result 24 states and 48 transitions. Complement of second has 5 states. [2022-09-29 14:47:45,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 3 states 1 stem states 1 non-accepting loop states 1 accepting loop states [2022-09-29 14:47:45,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 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) [2022-09-29 14:47:45,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 11 transitions. [2022-09-29 14:47:45,719 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 11 transitions. Stem has 4 letters. Loop has 1 letters. [2022-09-29 14:47:45,719 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-09-29 14:47:45,719 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 11 transitions. Stem has 5 letters. Loop has 1 letters. [2022-09-29 14:47:45,719 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-09-29 14:47:45,719 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 11 transitions. Stem has 4 letters. Loop has 2 letters. [2022-09-29 14:47:45,719 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-09-29 14:47:45,720 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 24 states and 48 transitions. [2022-09-29 14:47:45,721 INFO L131 ngComponentsAnalysis]: Automaton has 4 accepting balls. 4 [2022-09-29 14:47:45,722 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 24 states to 14 states and 29 transitions. [2022-09-29 14:47:45,724 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 8 [2022-09-29 14:47:45,724 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 10 [2022-09-29 14:47:45,724 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 29 transitions. [2022-09-29 14:47:45,724 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2022-09-29 14:47:45,724 INFO L218 hiAutomatonCegarLoop]: Abstraction has 14 states and 29 transitions. [2022-09-29 14:47:45,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states and 29 transitions. [2022-09-29 14:47:45,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 12. [2022-09-29 14:47:45,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 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) [2022-09-29 14:47:45,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 24 transitions. [2022-09-29 14:47:45,726 INFO L240 hiAutomatonCegarLoop]: Abstraction has 12 states and 24 transitions. [2022-09-29 14:47:45,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-29 14:47:45,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-09-29 14:47:45,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-09-29 14:47:45,728 INFO L87 Difference]: Start difference. First operand 12 states and 24 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 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) [2022-09-29 14:47:45,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-09-29 14:47:45,743 INFO L93 Difference]: Finished difference Result 15 states and 26 transitions. [2022-09-29 14:47:45,743 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 15 states and 26 transitions. [2022-09-29 14:47:45,747 INFO L131 ngComponentsAnalysis]: Automaton has 4 accepting balls. 4 [2022-09-29 14:47:45,749 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 15 states to 14 states and 25 transitions. [2022-09-29 14:47:45,749 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 9 [2022-09-29 14:47:45,749 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 9 [2022-09-29 14:47:45,749 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 25 transitions. [2022-09-29 14:47:45,749 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2022-09-29 14:47:45,750 INFO L218 hiAutomatonCegarLoop]: Abstraction has 14 states and 25 transitions. [2022-09-29 14:47:45,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states and 25 transitions. [2022-09-29 14:47:45,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 12. [2022-09-29 14:47:45,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 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) [2022-09-29 14:47:45,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 23 transitions. [2022-09-29 14:47:45,751 INFO L240 hiAutomatonCegarLoop]: Abstraction has 12 states and 23 transitions. [2022-09-29 14:47:45,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-09-29 14:47:45,754 INFO L428 stractBuchiCegarLoop]: Abstraction has 12 states and 23 transitions. [2022-09-29 14:47:45,754 INFO L335 stractBuchiCegarLoop]: ======== Iteration 3 ============ [2022-09-29 14:47:45,754 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 12 states and 23 transitions. [2022-09-29 14:47:45,754 INFO L131 ngComponentsAnalysis]: Automaton has 4 accepting balls. 4 [2022-09-29 14:47:45,755 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2022-09-29 14:47:45,755 INFO L119 BuchiIsEmpty]: Starting construction of run [2022-09-29 14:47:45,755 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1] [2022-09-29 14:47:45,755 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1] [2022-09-29 14:47:45,756 INFO L733 eck$LassoCheckResult]: Stem: 239#[ULTIMATE.startENTRY]don't care [21] ULTIMATE.startENTRY-->L15: Formula: (= v_x_5 0) InVars {} OutVars{x=v_x_5} AuxVars[] AssignedVars[x] 241#[L15]don't care [44] L15-->L24: Formula: (= v_incThread1of1ForFork0_thidvar0_2 1) InVars {} OutVars{incThread1of1ForFork0_thidvar0=v_incThread1of1ForFork0_thidvar0_2} AuxVars[] AssignedVars[incThread1of1ForFork0_thidvar0] 243#[L15-1, L24]don't care [47] L15-1-->L32: Formula: (and (= v_decThread1of1ForFork1_thidvar1_2 2) (= v_decThread1of1ForFork1_thidvar0_2 2)) InVars {} OutVars{decThread1of1ForFork1_thidvar0=v_decThread1of1ForFork1_thidvar0_2, decThread1of1ForFork1_thidvar1=v_decThread1of1ForFork1_thidvar1_2} AuxVars[] AssignedVars[decThread1of1ForFork1_thidvar0, decThread1of1ForFork1_thidvar1] 249#[L24, L16, L32]don't care [53] L24-->L24: Formula: (and (< v_x_35 v_n_9) (= v_x_34 (+ v_x_35 1))) InVars {n=v_n_9, x=v_x_35} OutVars{n=v_n_9, x=v_x_34} AuxVars[] AssignedVars[x] 257#[L24, L16, L32]don't care [51] L32-->L32: Formula: (and (= (+ (- 1) v_x_21) v_x_20) (< 0 v_x_21)) InVars {x=v_x_21} OutVars{x=v_x_20} AuxVars[] AssignedVars[x] 255#[L24, L16, L32]don't care [2022-09-29 14:47:45,756 INFO L735 eck$LassoCheckResult]: Loop: 255#[L24, L16, L32]don't care [51] L32-->L32: Formula: (and (= (+ (- 1) v_x_21) v_x_20) (< 0 v_x_21)) InVars {x=v_x_21} OutVars{x=v_x_20} AuxVars[] AssignedVars[x] 255#[L24, L16, L32]don't care [2022-09-29 14:47:45,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-29 14:47:45,756 INFO L85 PathProgramCache]: Analyzing trace with hash 49380757, now seen corresponding path program 1 times [2022-09-29 14:47:45,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-29 14:47:45,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553044973] [2022-09-29 14:47:45,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-29 14:47:45,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-29 14:47:45,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-09-29 14:47:45,764 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-09-29 14:47:45,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-09-29 14:47:45,768 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-09-29 14:47:45,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-29 14:47:45,768 INFO L85 PathProgramCache]: Analyzing trace with hash 82, now seen corresponding path program 2 times [2022-09-29 14:47:45,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-29 14:47:45,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214134956] [2022-09-29 14:47:45,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-29 14:47:45,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-29 14:47:45,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-09-29 14:47:45,770 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-09-29 14:47:45,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-09-29 14:47:45,777 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-09-29 14:47:45,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-29 14:47:45,778 INFO L85 PathProgramCache]: Analyzing trace with hash 1530803518, now seen corresponding path program 2 times [2022-09-29 14:47:45,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-29 14:47:45,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815161804] [2022-09-29 14:47:45,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-29 14:47:45,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-29 14:47:45,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-29 14:47:45,798 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-29 14:47:45,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-29 14:47:45,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815161804] [2022-09-29 14:47:45,798 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815161804] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-29 14:47:45,798 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-29 14:47:45,798 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-09-29 14:47:45,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861104190] [2022-09-29 14:47:45,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-29 14:47:45,810 INFO L210 LassoAnalysis]: Preferences: [2022-09-29 14:47:45,810 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-09-29 14:47:45,810 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-09-29 14:47:45,810 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-09-29 14:47:45,810 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2022-09-29 14:47:45,810 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-09-29 14:47:45,810 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-09-29 14:47:45,810 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-09-29 14:47:45,810 INFO L133 ssoRankerPreferences]: Filename of dumped script: concurrent_increment_nonterminating.bpl_BEv2_Iteration3_Loop [2022-09-29 14:47:45,810 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-09-29 14:47:45,810 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-09-29 14:47:45,811 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-09-29 14:47:45,823 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-09-29 14:47:45,823 INFO L404 LassoAnalysis]: Checking for nontermination... [2022-09-29 14:47:45,823 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-09-29 14:47:45,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-29 14:47:45,825 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-09-29 14:47:45,826 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Waiting until timeout for monitored process [2022-09-29 14:47:45,827 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-09-29 14:47:45,827 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-09-29 14:47:45,864 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Forceful destruction successful, exit code 0 [2022-09-29 14:47:45,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-09-29 14:47:45,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-29 14:47:45,866 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-09-29 14:47:45,867 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Waiting until timeout for monitored process [2022-09-29 14:47:45,868 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2022-09-29 14:47:45,868 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-09-29 14:47:45,896 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2022-09-29 14:47:45,900 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Forceful destruction successful, exit code 0 [2022-09-29 14:47:45,901 INFO L210 LassoAnalysis]: Preferences: [2022-09-29 14:47:45,901 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-09-29 14:47:45,901 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-09-29 14:47:45,901 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-09-29 14:47:45,901 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2022-09-29 14:47:45,901 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-09-29 14:47:45,901 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-09-29 14:47:45,901 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-09-29 14:47:45,901 INFO L133 ssoRankerPreferences]: Filename of dumped script: concurrent_increment_nonterminating.bpl_BEv2_Iteration3_Loop [2022-09-29 14:47:45,901 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-09-29 14:47:45,901 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-09-29 14:47:45,902 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-09-29 14:47:45,918 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-09-29 14:47:45,918 INFO L490 LassoAnalysis]: Using template 'affine'. [2022-09-29 14:47:45,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-09-29 14:47:45,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-29 14:47:45,919 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-09-29 14:47:45,936 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Waiting until timeout for monitored process [2022-09-29 14:47:45,939 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2022-09-29 14:47:45,945 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-09-29 14:47:45,945 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-09-29 14:47:45,945 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-09-29 14:47:45,945 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-09-29 14:47:45,945 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-09-29 14:47:45,946 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-09-29 14:47:45,946 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-09-29 14:47:45,947 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2022-09-29 14:47:45,956 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2022-09-29 14:47:45,956 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2022-09-29 14:47:45,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-09-29 14:47:45,957 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-29 14:47:45,958 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-09-29 14:47:45,959 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Waiting until timeout for monitored process [2022-09-29 14:47:45,961 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2022-09-29 14:47:45,961 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2022-09-29 14:47:45,961 INFO L513 LassoAnalysis]: Proved termination. [2022-09-29 14:47:45,961 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(x) = 1*x Supporting invariants [] [2022-09-29 14:47:45,976 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Ended with exit code 0 [2022-09-29 14:47:45,977 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2022-09-29 14:47:45,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-29 14:47:45,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-29 14:47:45,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 16 conjuncts, 2 conjunts are in the unsatisfiable core [2022-09-29 14:47:45,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-29 14:47:46,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-29 14:47:46,001 WARN L261 TraceCheckSpWp]: Trace formula consists of 5 conjuncts, 4 conjunts are in the unsatisfiable core [2022-09-29 14:47:46,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-29 14:47:46,001 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-29 14:47:46,002 INFO L141 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 1 loop predicates [2022-09-29 14:47:46,002 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 12 states and 23 transitions. cyclomatic complexity: 18 Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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) [2022-09-29 14:47:46,016 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 12 states and 23 transitions. cyclomatic complexity: 18. Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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) Result 30 states and 57 transitions. Complement of second has 5 states. [2022-09-29 14:47:46,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 3 states 1 stem states 1 non-accepting loop states 1 accepting loop states [2022-09-29 14:47:46,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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) [2022-09-29 14:47:46,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 13 transitions. [2022-09-29 14:47:46,017 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 13 transitions. Stem has 5 letters. Loop has 1 letters. [2022-09-29 14:47:46,017 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-09-29 14:47:46,017 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 13 transitions. Stem has 6 letters. Loop has 1 letters. [2022-09-29 14:47:46,017 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-09-29 14:47:46,017 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 13 transitions. Stem has 5 letters. Loop has 2 letters. [2022-09-29 14:47:46,017 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-09-29 14:47:46,017 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 30 states and 57 transitions. [2022-09-29 14:47:46,018 INFO L131 ngComponentsAnalysis]: Automaton has 4 accepting balls. 4 [2022-09-29 14:47:46,018 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 30 states to 17 states and 34 transitions. [2022-09-29 14:47:46,019 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 10 [2022-09-29 14:47:46,019 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 12 [2022-09-29 14:47:46,019 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 34 transitions. [2022-09-29 14:47:46,019 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2022-09-29 14:47:46,019 INFO L218 hiAutomatonCegarLoop]: Abstraction has 17 states and 34 transitions. [2022-09-29 14:47:46,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states and 34 transitions. [2022-09-29 14:47:46,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 13. [2022-09-29 14:47:46,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 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) [2022-09-29 14:47:46,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 25 transitions. [2022-09-29 14:47:46,021 INFO L240 hiAutomatonCegarLoop]: Abstraction has 13 states and 25 transitions. [2022-09-29 14:47:46,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-29 14:47:46,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-09-29 14:47:46,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-09-29 14:47:46,021 INFO L87 Difference]: Start difference. First operand 13 states and 25 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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) [2022-09-29 14:47:46,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-09-29 14:47:46,037 INFO L93 Difference]: Finished difference Result 28 states and 50 transitions. [2022-09-29 14:47:46,037 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 28 states and 50 transitions. [2022-09-29 14:47:46,038 INFO L131 ngComponentsAnalysis]: Automaton has 5 accepting balls. 6 [2022-09-29 14:47:46,038 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 28 states to 24 states and 44 transitions. [2022-09-29 14:47:46,038 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 15 [2022-09-29 14:47:46,038 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 16 [2022-09-29 14:47:46,038 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 44 transitions. [2022-09-29 14:47:46,039 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2022-09-29 14:47:46,039 INFO L218 hiAutomatonCegarLoop]: Abstraction has 24 states and 44 transitions. [2022-09-29 14:47:46,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states and 44 transitions. [2022-09-29 14:47:46,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 19. [2022-09-29 14:47:46,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 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) [2022-09-29 14:47:46,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 37 transitions. [2022-09-29 14:47:46,040 INFO L240 hiAutomatonCegarLoop]: Abstraction has 19 states and 37 transitions. [2022-09-29 14:47:46,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-09-29 14:47:46,041 INFO L428 stractBuchiCegarLoop]: Abstraction has 19 states and 37 transitions. [2022-09-29 14:47:46,041 INFO L335 stractBuchiCegarLoop]: ======== Iteration 4 ============ [2022-09-29 14:47:46,041 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 19 states and 37 transitions. [2022-09-29 14:47:46,042 INFO L131 ngComponentsAnalysis]: Automaton has 5 accepting balls. 6 [2022-09-29 14:47:46,042 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2022-09-29 14:47:46,042 INFO L119 BuchiIsEmpty]: Starting construction of run [2022-09-29 14:47:46,042 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1] [2022-09-29 14:47:46,042 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1] [2022-09-29 14:47:46,042 INFO L733 eck$LassoCheckResult]: Stem: 386#[ULTIMATE.startENTRY]don't care [21] ULTIMATE.startENTRY-->L15: Formula: (= v_x_5 0) InVars {} OutVars{x=v_x_5} AuxVars[] AssignedVars[x] 388#[L15]don't care [44] L15-->L24: Formula: (= v_incThread1of1ForFork0_thidvar0_2 1) InVars {} OutVars{incThread1of1ForFork0_thidvar0=v_incThread1of1ForFork0_thidvar0_2} AuxVars[] AssignedVars[incThread1of1ForFork0_thidvar0] 390#[L15-1, L24]don't care [53] L24-->L24: Formula: (and (< v_x_35 v_n_9) (= v_x_34 (+ v_x_35 1))) InVars {n=v_n_9, x=v_x_35} OutVars{n=v_n_9, x=v_x_34} AuxVars[] AssignedVars[x] 394#[L15-1, L24]don't care [47] L15-1-->L32: Formula: (and (= v_decThread1of1ForFork1_thidvar1_2 2) (= v_decThread1of1ForFork1_thidvar0_2 2)) InVars {} OutVars{decThread1of1ForFork1_thidvar0=v_decThread1of1ForFork1_thidvar0_2, decThread1of1ForFork1_thidvar1=v_decThread1of1ForFork1_thidvar1_2} AuxVars[] AssignedVars[decThread1of1ForFork1_thidvar0, decThread1of1ForFork1_thidvar1] 400#[L24, L16, L32]don't care [51] L32-->L32: Formula: (and (= (+ (- 1) v_x_21) v_x_20) (< 0 v_x_21)) InVars {x=v_x_21} OutVars{x=v_x_20} AuxVars[] AssignedVars[x] 404#[L24, L16, L32]don't care [2022-09-29 14:47:46,042 INFO L735 eck$LassoCheckResult]: Loop: 404#[L24, L16, L32]don't care [53] L24-->L24: Formula: (and (< v_x_35 v_n_9) (= v_x_34 (+ v_x_35 1))) InVars {n=v_n_9, x=v_x_35} OutVars{n=v_n_9, x=v_x_34} AuxVars[] AssignedVars[x] 410#[L24, L16, L32]don't care [51] L32-->L32: Formula: (and (= (+ (- 1) v_x_21) v_x_20) (< 0 v_x_21)) InVars {x=v_x_21} OutVars{x=v_x_20} AuxVars[] AssignedVars[x] 404#[L24, L16, L32]don't care [2022-09-29 14:47:46,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-29 14:47:46,043 INFO L85 PathProgramCache]: Analyzing trace with hash 49386337, now seen corresponding path program 3 times [2022-09-29 14:47:46,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-29 14:47:46,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295957111] [2022-09-29 14:47:46,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-29 14:47:46,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-29 14:47:46,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-09-29 14:47:46,047 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-09-29 14:47:46,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-09-29 14:47:46,049 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-09-29 14:47:46,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-29 14:47:46,050 INFO L85 PathProgramCache]: Analyzing trace with hash 2655, now seen corresponding path program 1 times [2022-09-29 14:47:46,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-29 14:47:46,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509492665] [2022-09-29 14:47:46,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-29 14:47:46,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-29 14:47:46,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-09-29 14:47:46,052 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-09-29 14:47:46,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-09-29 14:47:46,054 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-09-29 14:47:46,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-29 14:47:46,054 INFO L85 PathProgramCache]: Analyzing trace with hash 215631295, now seen corresponding path program 4 times [2022-09-29 14:47:46,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-29 14:47:46,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242500362] [2022-09-29 14:47:46,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-29 14:47:46,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-29 14:47:46,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-09-29 14:47:46,058 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-09-29 14:47:46,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-09-29 14:47:46,061 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-09-29 14:47:46,130 INFO L202 PluginConnector]: Adding new model concurrent_increment_nonterminating.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 29.09 02:47:46 BoogieIcfgContainer [2022-09-29 14:47:46,131 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2022-09-29 14:47:46,131 INFO L158 Benchmark]: Toolchain (without parser) took 1985.97ms. Allocated memory was 186.6MB in the beginning and 249.6MB in the end (delta: 62.9MB). Free memory was 145.7MB in the beginning and 222.8MB in the end (delta: -77.1MB). Peak memory consumption was 48.9MB. Max. memory is 8.0GB. [2022-09-29 14:47:46,131 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.12ms. Allocated memory is still 186.6MB. Free memory is still 146.6MB. There was no memory consumed. Max. memory is 8.0GB. [2022-09-29 14:47:46,131 INFO L158 Benchmark]: Boogie Procedure Inliner took 18.97ms. Allocated memory is still 186.6MB. Free memory was 145.6MB in the beginning and 144.0MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-09-29 14:47:46,132 INFO L158 Benchmark]: Boogie Preprocessor took 11.51ms. Allocated memory is still 186.6MB. Free memory was 144.0MB in the beginning and 143.1MB in the end (delta: 921.6kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-09-29 14:47:46,132 INFO L158 Benchmark]: RCFGBuilder took 165.23ms. Allocated memory is still 186.6MB. Free memory was 143.1MB in the beginning and 163.3MB in the end (delta: -20.2MB). Peak memory consumption was 14.0MB. Max. memory is 8.0GB. [2022-09-29 14:47:46,132 INFO L158 Benchmark]: BuchiAutomizer took 1787.01ms. Allocated memory was 186.6MB in the beginning and 249.6MB in the end (delta: 62.9MB). Free memory was 163.3MB in the beginning and 222.8MB in the end (delta: -59.5MB). Peak memory consumption was 65.3MB. Max. memory is 8.0GB. [2022-09-29 14:47:46,133 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 0.12ms. Allocated memory is still 186.6MB. Free memory is still 146.6MB. There was no memory consumed. Max. memory is 8.0GB. * Boogie Procedure Inliner took 18.97ms. Allocated memory is still 186.6MB. Free memory was 145.6MB in the beginning and 144.0MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 11.51ms. Allocated memory is still 186.6MB. Free memory was 144.0MB in the beginning and 143.1MB in the end (delta: 921.6kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 165.23ms. Allocated memory is still 186.6MB. Free memory was 143.1MB in the beginning and 163.3MB in the end (delta: -20.2MB). Peak memory consumption was 14.0MB. Max. memory is 8.0GB. * BuchiAutomizer took 1787.01ms. Allocated memory was 186.6MB in the beginning and 249.6MB in the end (delta: 62.9MB). Free memory was 163.3MB in the beginning and 222.8MB in the end (delta: -59.5MB). Peak memory consumption was 65.3MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 5 terminating modules (2 trivial, 3 deterministic, 0 nondeterministic) and one nonterminating remainder module.One deterministic module has affine ranking function -1 * x + n and consists of 3 locations. One deterministic module has affine ranking function x and consists of 3 locations. One deterministic module has affine ranking function x and consists of 3 locations. 2 modules have a trivial ranking function, the largest among these consists of 4 locations. The remainder module has 19 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 1.7s and 4 iterations. TraceHistogramMax:1. Analysis of lassos took 1.2s. Construction of modules took 0.0s. Büchi inclusion checks took 0.1s. Highest rank in rank-based complementation 3. Minimization of det autom 0. Minimization of nondet autom 5. Automata minimization 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 17 StatesRemovedByMinimization, 5 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had -1 states and ocurred in iteration -1. Nontrivial modules had stage [3, 0, 0, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/0 HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 34 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 31 mSDsluCounter, 7 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 12 mSDsCounter, 7 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 76 IncrementalHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 7 mSolverCounterUnsat, 6 mSDtfsCounter, 76 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown LassoAnalysisResults: nont1 unkn0 SFLI0 SFLT1 conc0 concLT2 SILN0 SILU0 SILI0 SILT0 lasso0 LassoPreprocessingBenchmarks: Lassos: inital10 mio100 ax100 hnf100 lsp100 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq160 hnf93 smp100 dnf100 smp100 tf113 neg100 sie111 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: sat Degree: 0 Time: 66ms VariablesStem: 0 VariablesLoop: 3 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 0 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 3 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 0.4s InitialAbstractionConstructionTime: 0.2s - TerminationAnalysisResult: Nontermination possible Buchi Automizer proved that your program is nonterminating for some inputs - FixpointNonTerminationResult [Line: 24]: Nontermination argument in form of an infinite program execution. Nontermination argument in form of an infinite execution State at position 0 is {n=1} State at position 1 is {n=1, x=0} - StatisticsResult: NonterminationArgumentStatistics Fixpoint - NonterminatingLassoResult [Line: 24]: Nonterminating execution Found a nonterminating execution for the following lasso shaped sequence of statements. Stem: [L13] 0 x := 0; [L15] FORK 0 fork 1 inc(); [L24] COND TRUE 1 x < n [L25] 1 x := x + 1; [L16] FORK 0 fork 2, 2 dec(); [L32] COND TRUE 2 x > 0 [L33] 2 x := x - 1; Loop: [L24] COND TRUE x < n [L25] x := x + 1; [L32] COND TRUE x > 0 [L33] x := x - 1; End of lasso representation. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 0.1s, 19 PlacesBefore, 15 PlacesAfterwards, 14 TransitionsBefore, 10 TransitionsAfterwards, 48 CoEnabledTransitionPairs, 1 FixpointIterations, 0 TrivialSequentialCompositions, 4 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 4 TotalNumberOfCompositions, 43 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 39, positive: 35, positive conditional: 0, positive unconditional: 35, negative: 4, negative conditional: 0, negative unconditional: 4, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 34, positive: 30, positive conditional: 0, positive unconditional: 30, negative: 4, negative conditional: 0, negative unconditional: 4, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 34, positive: 28, positive conditional: 0, positive unconditional: 28, negative: 6, negative conditional: 0, negative unconditional: 6, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 6, positive: 2, positive conditional: 0, positive unconditional: 2, negative: 4, negative conditional: 0, negative unconditional: 4, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 54, positive: 16, positive conditional: 0, positive unconditional: 16, negative: 38, negative conditional: 0, negative unconditional: 38, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 39, positive: 5, positive conditional: 0, positive unconditional: 5, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 34, unknown conditional: 0, unknown unconditional: 34] , Statistics on independence cache: Total cache size (in pairs): 6, Positive cache size: 4, Positive conditional cache size: 0, Positive unconditional cache size: 4, Negative cache size: 2, Negative conditional cache size: 0, Negative unconditional cache size: 2 RESULT: Ultimate proved your program to be incorrect! [2022-09-29 14:47:46,152 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Forceful destruction successful, exit code 0 [2022-09-29 14:47:46,176 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Forceful destruction successful, exit code 0 [2022-09-29 14:47:46,328 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Forceful destruction successful, exit code 0 [2022-09-29 14:47:46,368 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...