/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/default/automizer/svcomp-Termination-32bit-Automizer_Default.epf --buchiautomizer.automaton.type.for.concurrent.programs BUCHI_AUTOMATON -i ../../../trunk/examples/concurrent/bpl/ConcurrentTerminationBpl/concurrent_increment_nonterminating2.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.3-wip.fs.rabin-petrinet-4c29625-m [2023-10-12 17:12:11,528 INFO L172 SettingsManager]: Resetting all preferences to default values... [2023-10-12 17:12:11,598 INFO L100 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Termination-32bit-Automizer_Default.epf [2023-10-12 17:12:11,632 INFO L114 SettingsManager]: Preferences different from defaults after loading the file: [2023-10-12 17:12:11,633 INFO L135 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-10-12 17:12:11,634 INFO L137 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-10-12 17:12:11,635 INFO L135 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-10-12 17:12:11,635 INFO L137 SettingsManager]: * Create parallel compositions if possible=false [2023-10-12 17:12:11,635 INFO L137 SettingsManager]: * Use SBE=true [2023-10-12 17:12:11,639 INFO L135 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2023-10-12 17:12:11,639 INFO L137 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2023-10-12 17:12:11,639 INFO L137 SettingsManager]: * Use old map elimination=false [2023-10-12 17:12:11,640 INFO L137 SettingsManager]: * Use external solver (rank synthesis)=false [2023-10-12 17:12:11,641 INFO L137 SettingsManager]: * Use only trivial implications for array writes=true [2023-10-12 17:12:11,642 INFO L137 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2023-10-12 17:12:11,642 INFO L135 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-10-12 17:12:11,642 INFO L137 SettingsManager]: * sizeof long=4 [2023-10-12 17:12:11,642 INFO L137 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-10-12 17:12:11,642 INFO L137 SettingsManager]: * Overapproximate operations on floating types=true [2023-10-12 17:12:11,643 INFO L137 SettingsManager]: * sizeof POINTER=4 [2023-10-12 17:12:11,643 INFO L137 SettingsManager]: * Check division by zero=IGNORE [2023-10-12 17:12:11,643 INFO L137 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2023-10-12 17:12:11,644 INFO L137 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2023-10-12 17:12:11,644 INFO L137 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2023-10-12 17:12:11,644 INFO L137 SettingsManager]: * sizeof long double=12 [2023-10-12 17:12:11,644 INFO L137 SettingsManager]: * Check if freed pointer was valid=false [2023-10-12 17:12:11,644 INFO L137 SettingsManager]: * Assume nondeterminstic values are in range=false [2023-10-12 17:12:11,645 INFO L137 SettingsManager]: * Use constant arrays=true [2023-10-12 17:12:11,645 INFO L137 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2023-10-12 17:12:11,645 INFO L135 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-10-12 17:12:11,646 INFO L137 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-10-12 17:12:11,646 INFO L135 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-10-12 17:12:11,647 INFO L137 SettingsManager]: * Trace refinement strategy=CAMEL [2023-10-12 17:12:11,648 INFO L135 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2023-10-12 17:12:11,648 INFO L137 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer: Automaton type for concurrent programs -> BUCHI_AUTOMATON [2023-10-12 17:12:11,854 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-10-12 17:12:11,878 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-10-12 17:12:11,880 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-10-12 17:12:11,881 INFO L270 PluginConnector]: Initializing Boogie PL CUP Parser... [2023-10-12 17:12:11,882 INFO L274 PluginConnector]: Boogie PL CUP Parser initialized [2023-10-12 17:12:11,883 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/ConcurrentTerminationBpl/concurrent_increment_nonterminating2.bpl [2023-10-12 17:12:11,883 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/ConcurrentTerminationBpl/concurrent_increment_nonterminating2.bpl' [2023-10-12 17:12:11,903 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-10-12 17:12:11,904 INFO L133 ToolchainWalker]: Walking toolchain with 4 elements. [2023-10-12 17:12:11,906 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-10-12 17:12:11,906 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-10-12 17:12:11,906 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-10-12 17:12:11,918 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "concurrent_increment_nonterminating2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.10 05:12:11" (1/1) ... [2023-10-12 17:12:11,927 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "concurrent_increment_nonterminating2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.10 05:12:11" (1/1) ... [2023-10-12 17:12:11,934 INFO L138 Inliner]: procedures = 3, calls = 2, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2023-10-12 17:12:11,935 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-10-12 17:12:11,936 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-10-12 17:12:11,937 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-10-12 17:12:11,937 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-10-12 17:12:11,945 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "concurrent_increment_nonterminating2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.10 05:12:11" (1/1) ... [2023-10-12 17:12:11,945 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "concurrent_increment_nonterminating2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.10 05:12:11" (1/1) ... [2023-10-12 17:12:11,946 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "concurrent_increment_nonterminating2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.10 05:12:11" (1/1) ... [2023-10-12 17:12:11,946 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "concurrent_increment_nonterminating2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.10 05:12:11" (1/1) ... [2023-10-12 17:12:11,949 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "concurrent_increment_nonterminating2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.10 05:12:11" (1/1) ... [2023-10-12 17:12:11,952 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "concurrent_increment_nonterminating2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.10 05:12:11" (1/1) ... [2023-10-12 17:12:11,952 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "concurrent_increment_nonterminating2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.10 05:12:11" (1/1) ... [2023-10-12 17:12:11,953 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "concurrent_increment_nonterminating2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.10 05:12:11" (1/1) ... [2023-10-12 17:12:11,954 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-10-12 17:12:11,955 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-10-12 17:12:11,955 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-10-12 17:12:11,956 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-10-12 17:12:11,956 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "concurrent_increment_nonterminating2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.10 05:12:11" (1/1) ... [2023-10-12 17:12:11,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-10-12 17:12:11,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-10-12 17:12:11,990 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) [2023-10-12 17:12:12,012 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 [2023-10-12 17:12:12,026 INFO L124 BoogieDeclarations]: Specification and implementation of procedure dec given in one single declaration [2023-10-12 17:12:12,026 INFO L130 BoogieDeclarations]: Found specification of procedure dec [2023-10-12 17:12:12,026 INFO L138 BoogieDeclarations]: Found implementation of procedure dec [2023-10-12 17:12:12,026 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2023-10-12 17:12:12,026 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-10-12 17:12:12,026 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-10-12 17:12:12,027 INFO L124 BoogieDeclarations]: Specification and implementation of procedure inc given in one single declaration [2023-10-12 17:12:12,027 INFO L130 BoogieDeclarations]: Found specification of procedure inc [2023-10-12 17:12:12,027 INFO L138 BoogieDeclarations]: Found implementation of procedure inc [2023-10-12 17:12:12,028 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-10-12 17:12:12,073 INFO L236 CfgBuilder]: Building ICFG [2023-10-12 17:12:12,075 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-10-12 17:12:12,154 INFO L277 CfgBuilder]: Performing block encoding [2023-10-12 17:12:12,161 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-10-12 17:12:12,161 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-10-12 17:12:12,166 INFO L201 PluginConnector]: Adding new model concurrent_increment_nonterminating2.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 05:12:12 BoogieIcfgContainer [2023-10-12 17:12:12,167 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-10-12 17:12:12,168 INFO L112 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2023-10-12 17:12:12,168 INFO L270 PluginConnector]: Initializing BuchiAutomizer... [2023-10-12 17:12:12,172 INFO L274 PluginConnector]: BuchiAutomizer initialized [2023-10-12 17:12:12,172 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2023-10-12 17:12:12,172 INFO L184 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "concurrent_increment_nonterminating2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.10 05:12:11" (1/2) ... [2023-10-12 17:12:12,174 INFO L204 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@4d53b4b1 and model type concurrent_increment_nonterminating2.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 12.10 05:12:12, skipping insertion in model container [2023-10-12 17:12:12,174 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2023-10-12 17:12:12,175 INFO L184 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "concurrent_increment_nonterminating2.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 05:12:12" (2/2) ... [2023-10-12 17:12:12,178 INFO L332 chiAutomizerObserver]: Analyzing ICFG concurrent_increment_nonterminating2.bpl [2023-10-12 17:12:12,269 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-10-12 17:12:12,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 21 places, 18 transitions, 52 flow [2023-10-12 17:12:12,322 INFO L124 PetriNetUnfolderBase]: 2/14 cut-off events. [2023-10-12 17:12:12,322 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-10-12 17:12:12,327 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 13 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. [2023-10-12 17:12:12,327 INFO L82 GeneralOperation]: Start removeDead. Operand has 21 places, 18 transitions, 52 flow [2023-10-12 17:12:12,333 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 19 places, 14 transitions, 40 flow [2023-10-12 17:12:12,337 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-10-12 17:12:12,349 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 19 places, 14 transitions, 40 flow [2023-10-12 17:12:12,351 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 19 places, 14 transitions, 40 flow [2023-10-12 17:12:12,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 19 places, 14 transitions, 40 flow [2023-10-12 17:12:12,355 INFO L124 PetriNetUnfolderBase]: 2/14 cut-off events. [2023-10-12 17:12:12,355 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-10-12 17:12:12,356 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 13 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. [2023-10-12 17:12:12,356 INFO L119 LiptonReduction]: Number of co-enabled transitions 48 [2023-10-12 17:12:12,467 INFO L134 LiptonReduction]: Checked pairs total: 43 [2023-10-12 17:12:12,467 INFO L136 LiptonReduction]: Total number of compositions: 4 [2023-10-12 17:12:12,487 INFO L305 stractBuchiCegarLoop]: Interprodecural is true [2023-10-12 17:12:12,487 INFO L306 stractBuchiCegarLoop]: Hoare is false [2023-10-12 17:12:12,487 INFO L307 stractBuchiCegarLoop]: Compute interpolants for ForwardPredicates [2023-10-12 17:12:12,487 INFO L308 stractBuchiCegarLoop]: Backedges is STRAIGHT_LINE [2023-10-12 17:12:12,488 INFO L309 stractBuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2023-10-12 17:12:12,488 INFO L310 stractBuchiCegarLoop]: Difference is false [2023-10-12 17:12:12,488 INFO L311 stractBuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2023-10-12 17:12:12,488 INFO L315 stractBuchiCegarLoop]: ======== Iteration 0 == of CEGAR loop == BuchiAutomatonCegarLoop ======== [2023-10-12 17:12:12,489 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand currently 0 states, but on-demand construction may add more states [2023-10-12 17:12:12,511 INFO L131 ngComponentsAnalysis]: Automaton has 5 accepting balls. 5 [2023-10-12 17:12:12,511 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2023-10-12 17:12:12,511 INFO L119 BuchiIsEmpty]: Starting construction of run [2023-10-12 17:12:12,515 INFO L149 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1] [2023-10-12 17:12:12,515 INFO L150 hiAutomatonCegarLoop]: Counterexample loop histogram [1] [2023-10-12 17:12:12,516 INFO L337 stractBuchiCegarLoop]: ======== Iteration 1 ============ [2023-10-12 17:12:12,516 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand currently 11 states, but on-demand construction may add more states [2023-10-12 17:12:12,517 INFO L131 ngComponentsAnalysis]: Automaton has 5 accepting balls. 5 [2023-10-12 17:12:12,517 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2023-10-12 17:12:12,517 INFO L119 BuchiIsEmpty]: Starting construction of run [2023-10-12 17:12:12,518 INFO L149 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1] [2023-10-12 17:12:12,518 INFO L150 hiAutomatonCegarLoop]: Counterexample loop histogram [1] [2023-10-12 17:12:12,522 INFO L748 eck$LassoCheckResult]: Stem: 24#[$Ultimate##0]don't care [28] $Ultimate##0-->L15: Formula: (= (+ 2 v_x_5) 0) InVars {} OutVars{x=v_x_5} AuxVars[] AssignedVars[x] 27#[L15]don't care [44] L15-->L24: Formula: (= v_decThread1of1ForFork0_thidvar0_2 1) InVars {} OutVars{decThread1of1ForFork0_thidvar0=v_decThread1of1ForFork0_thidvar0_2} AuxVars[] AssignedVars[decThread1of1ForFork0_thidvar0] 29#[L24, L15-1]don't care [2023-10-12 17:12:12,522 INFO L750 eck$LassoCheckResult]: Loop: 29#[L24, L15-1]don't care [53] L24-->L24: Formula: (and (= v_x_35 (+ v_x_34 1)) (< 0 (+ v_x_35 1))) InVars {x=v_x_35} OutVars{x=v_x_34} AuxVars[] AssignedVars[x] 29#[L24, L15-1]don't care [2023-10-12 17:12:12,526 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-10-12 17:12:12,526 INFO L85 PathProgramCache]: Analyzing trace with hash 1873, now seen corresponding path program 1 times [2023-10-12 17:12:12,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-10-12 17:12:12,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156698441] [2023-10-12 17:12:12,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-10-12 17:12:12,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-10-12 17:12:12,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-10-12 17:12:12,622 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-10-12 17:12:12,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-10-12 17:12:12,648 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-10-12 17:12:12,651 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-10-12 17:12:12,651 INFO L85 PathProgramCache]: Analyzing trace with hash 84, now seen corresponding path program 1 times [2023-10-12 17:12:12,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-10-12 17:12:12,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403556081] [2023-10-12 17:12:12,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-10-12 17:12:12,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-10-12 17:12:12,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-10-12 17:12:12,661 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-10-12 17:12:12,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-10-12 17:12:12,665 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-10-12 17:12:12,667 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-10-12 17:12:12,667 INFO L85 PathProgramCache]: Analyzing trace with hash 58116, now seen corresponding path program 1 times [2023-10-12 17:12:12,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-10-12 17:12:12,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544298127] [2023-10-12 17:12:12,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-10-12 17:12:12,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-10-12 17:12:12,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-10-12 17:12:12,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-10-12 17:12:12,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-10-12 17:12:12,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544298127] [2023-10-12 17:12:12,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544298127] provided 1 perfect and 0 imperfect interpolant sequences [2023-10-12 17:12:12,716 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-10-12 17:12:12,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-10-12 17:12:12,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526531852] [2023-10-12 17:12:12,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-10-12 17:12:12,761 INFO L210 LassoAnalysis]: Preferences: [2023-10-12 17:12:12,761 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-10-12 17:12:12,762 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-10-12 17:12:12,762 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-10-12 17:12:12,762 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2023-10-12 17:12:12,762 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-10-12 17:12:12,762 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-10-12 17:12:12,762 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-10-12 17:12:12,762 INFO L133 ssoRankerPreferences]: Filename of dumped script: concurrent_increment_nonterminating2.bpl_BEv2_Iteration1_Loop [2023-10-12 17:12:12,763 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-10-12 17:12:12,763 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-10-12 17:12:12,777 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-10-12 17:12:12,809 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-10-12 17:12:12,810 INFO L404 LassoAnalysis]: Checking for nontermination... [2023-10-12 17:12:12,812 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-10-12 17:12:12,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-10-12 17:12:12,815 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) [2023-10-12 17:12:12,822 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-10-12 17:12:12,822 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-10-12 17:12:12,834 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 [2023-10-12 17:12:12,855 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 [2023-10-12 17:12:12,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-10-12 17:12:12,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-10-12 17:12:12,857 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) [2023-10-12 17:12:12,860 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 [2023-10-12 17:12:12,875 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2023-10-12 17:12:12,875 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-10-12 17:12:12,905 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2023-10-12 17:12:12,911 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 [2023-10-12 17:12:12,911 INFO L210 LassoAnalysis]: Preferences: [2023-10-12 17:12:12,911 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-10-12 17:12:12,911 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-10-12 17:12:12,911 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-10-12 17:12:12,912 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2023-10-12 17:12:12,912 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-10-12 17:12:12,912 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-10-12 17:12:12,912 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-10-12 17:12:12,912 INFO L133 ssoRankerPreferences]: Filename of dumped script: concurrent_increment_nonterminating2.bpl_BEv2_Iteration1_Loop [2023-10-12 17:12:12,912 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-10-12 17:12:12,912 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-10-12 17:12:12,913 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-10-12 17:12:12,945 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-10-12 17:12:12,949 INFO L490 LassoAnalysis]: Using template 'affine'. [2023-10-12 17:12:12,951 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-10-12 17:12:12,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-10-12 17:12:12,952 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) [2023-10-12 17:12:12,955 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 [2023-10-12 17:12:12,956 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 [2023-10-12 17:12:12,963 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-10-12 17:12:12,964 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-10-12 17:12:12,964 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-10-12 17:12:12,964 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-10-12 17:12:12,964 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-10-12 17:12:12,967 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-10-12 17:12:12,967 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-10-12 17:12:12,989 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2023-10-12 17:12:12,995 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2023-10-12 17:12:12,995 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. [2023-10-12 17:12:12,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-10-12 17:12:12,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-10-12 17:12:13,039 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) [2023-10-12 17:12:13,041 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 [2023-10-12 17:12:13,240 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2023-10-12 17:12:13,240 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2023-10-12 17:12:13,240 INFO L513 LassoAnalysis]: Proved termination. [2023-10-12 17:12:13,241 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(x) = 2*x + 1 Supporting invariants [] [2023-10-12 17:12:13,246 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 [2023-10-12 17:12:13,249 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2023-10-12 17:12:13,272 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-10-12 17:12:13,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-10-12 17:12:13,280 INFO L262 TraceCheckSpWp]: Trace formula consists of 6 conjuncts, 2 conjunts are in the unsatisfiable core [2023-10-12 17:12:13,281 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-10-12 17:12:13,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-10-12 17:12:13,293 WARN L260 TraceCheckSpWp]: Trace formula consists of 5 conjuncts, 4 conjunts are in the unsatisfiable core [2023-10-12 17:12:13,295 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-10-12 17:12:13,295 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-10-12 17:12:13,330 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 [2023-10-12 17:12:13,333 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) [2023-10-12 17:12:13,371 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. [2023-10-12 17:12:13,373 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 [2023-10-12 17:12:13,377 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) [2023-10-12 17:12:13,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 13 transitions. [2023-10-12 17:12:13,379 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 13 transitions. Stem has 2 letters. Loop has 1 letters. [2023-10-12 17:12:13,379 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-10-12 17:12:13,379 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 13 transitions. Stem has 3 letters. Loop has 1 letters. [2023-10-12 17:12:13,380 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-10-12 17:12:13,380 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 13 transitions. Stem has 2 letters. Loop has 2 letters. [2023-10-12 17:12:13,380 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-10-12 17:12:13,381 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 36 states and 69 transitions. [2023-10-12 17:12:13,384 INFO L131 ngComponentsAnalysis]: Automaton has 4 accepting balls. 4 [2023-10-12 17:12:13,387 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 36 states to 16 states and 34 transitions. [2023-10-12 17:12:13,388 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 9 [2023-10-12 17:12:13,389 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 13 [2023-10-12 17:12:13,389 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 34 transitions. [2023-10-12 17:12:13,389 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2023-10-12 17:12:13,390 INFO L219 hiAutomatonCegarLoop]: Abstraction has 16 states and 34 transitions. [2023-10-12 17:12:13,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states and 34 transitions. [2023-10-12 17:12:13,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 12. [2023-10-12 17:12:13,409 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) [2023-10-12 17:12:13,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 25 transitions. [2023-10-12 17:12:13,411 INFO L241 hiAutomatonCegarLoop]: Abstraction has 12 states and 25 transitions. [2023-10-12 17:12:13,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-10-12 17:12:13,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-10-12 17:12:13,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-10-12 17:12:13,414 INFO L87 Difference]: Start difference. First operand 12 states and 25 transitions. Second operand has 3 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) [2023-10-12 17:12:13,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-10-12 17:12:13,429 INFO L93 Difference]: Finished difference Result 12 states and 19 transitions. [2023-10-12 17:12:13,429 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 12 states and 19 transitions. [2023-10-12 17:12:13,430 INFO L131 ngComponentsAnalysis]: Automaton has 4 accepting balls. 4 [2023-10-12 17:12:13,430 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 12 states to 11 states and 18 transitions. [2023-10-12 17:12:13,430 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 11 [2023-10-12 17:12:13,431 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 11 [2023-10-12 17:12:13,431 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 18 transitions. [2023-10-12 17:12:13,431 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-10-12 17:12:13,431 INFO L219 hiAutomatonCegarLoop]: Abstraction has 11 states and 18 transitions. [2023-10-12 17:12:13,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states and 18 transitions. [2023-10-12 17:12:13,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 9. [2023-10-12 17:12:13,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 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) [2023-10-12 17:12:13,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 15 transitions. [2023-10-12 17:12:13,433 INFO L241 hiAutomatonCegarLoop]: Abstraction has 9 states and 15 transitions. [2023-10-12 17:12:13,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-10-12 17:12:13,434 INFO L430 stractBuchiCegarLoop]: Abstraction has 9 states and 15 transitions. [2023-10-12 17:12:13,434 INFO L337 stractBuchiCegarLoop]: ======== Iteration 2 ============ [2023-10-12 17:12:13,435 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 9 states and 15 transitions. [2023-10-12 17:12:13,438 INFO L131 ngComponentsAnalysis]: Automaton has 4 accepting balls. 4 [2023-10-12 17:12:13,438 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2023-10-12 17:12:13,438 INFO L119 BuchiIsEmpty]: Starting construction of run [2023-10-12 17:12:13,438 INFO L149 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1, 1] [2023-10-12 17:12:13,438 INFO L150 hiAutomatonCegarLoop]: Counterexample loop histogram [1] [2023-10-12 17:12:13,439 INFO L748 eck$LassoCheckResult]: Stem: 160#[$Ultimate##0]don't care [28] $Ultimate##0-->L15: Formula: (= (+ 2 v_x_5) 0) InVars {} OutVars{x=v_x_5} AuxVars[] AssignedVars[x] 162#[L15]don't care [44] L15-->L24: Formula: (= v_decThread1of1ForFork0_thidvar0_2 1) InVars {} OutVars{decThread1of1ForFork0_thidvar0=v_decThread1of1ForFork0_thidvar0_2} AuxVars[] AssignedVars[decThread1of1ForFork0_thidvar0] 158#[L24, L15-1]don't care [52] L24-->decEXIT: Formula: (<= (+ v_x_28 1) 0) InVars {x=v_x_28} OutVars{x=v_x_28} AuxVars[] AssignedVars[] 150#[decEXIT, L15-1]don't care [47] L15-1-->L32: Formula: (and (= 2 v_incThread1of1ForFork1_thidvar0_2) (= 2 v_incThread1of1ForFork1_thidvar1_2)) InVars {} OutVars{incThread1of1ForFork1_thidvar0=v_incThread1of1ForFork1_thidvar0_2, incThread1of1ForFork1_thidvar1=v_incThread1of1ForFork1_thidvar1_2} AuxVars[] AssignedVars[incThread1of1ForFork1_thidvar0, incThread1of1ForFork1_thidvar1] 152#[L16, L32, decEXIT]don't care [2023-10-12 17:12:13,439 INFO L750 eck$LassoCheckResult]: Loop: 152#[L16, L32, decEXIT]don't care [51] L32-->L32: Formula: (and (< v_x_21 0) (= (+ v_x_21 1) v_x_20)) InVars {x=v_x_21} OutVars{x=v_x_20} AuxVars[] AssignedVars[x] 152#[L16, L32, decEXIT]don't care [2023-10-12 17:12:13,440 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-10-12 17:12:13,440 INFO L85 PathProgramCache]: Analyzing trace with hash 1801612, now seen corresponding path program 1 times [2023-10-12 17:12:13,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-10-12 17:12:13,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031871916] [2023-10-12 17:12:13,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-10-12 17:12:13,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-10-12 17:12:13,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-10-12 17:12:13,457 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-10-12 17:12:13,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-10-12 17:12:13,460 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-10-12 17:12:13,461 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-10-12 17:12:13,461 INFO L85 PathProgramCache]: Analyzing trace with hash 82, now seen corresponding path program 1 times [2023-10-12 17:12:13,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-10-12 17:12:13,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613458370] [2023-10-12 17:12:13,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-10-12 17:12:13,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-10-12 17:12:13,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-10-12 17:12:13,466 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-10-12 17:12:13,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-10-12 17:12:13,477 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-10-12 17:12:13,477 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-10-12 17:12:13,478 INFO L85 PathProgramCache]: Analyzing trace with hash 55850023, now seen corresponding path program 1 times [2023-10-12 17:12:13,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-10-12 17:12:13,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070266461] [2023-10-12 17:12:13,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-10-12 17:12:13,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-10-12 17:12:13,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-10-12 17:12:13,494 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-10-12 17:12:13,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-10-12 17:12:13,504 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-10-12 17:12:13,530 INFO L210 LassoAnalysis]: Preferences: [2023-10-12 17:12:13,531 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-10-12 17:12:13,531 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-10-12 17:12:13,531 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-10-12 17:12:13,531 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2023-10-12 17:12:13,531 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-10-12 17:12:13,531 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-10-12 17:12:13,531 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-10-12 17:12:13,531 INFO L133 ssoRankerPreferences]: Filename of dumped script: concurrent_increment_nonterminating2.bpl_BEv2_Iteration2_Loop [2023-10-12 17:12:13,532 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-10-12 17:12:13,532 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-10-12 17:12:13,532 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-10-12 17:12:13,553 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-10-12 17:12:13,553 INFO L404 LassoAnalysis]: Checking for nontermination... [2023-10-12 17:12:13,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-10-12 17:12:13,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-10-12 17:12:13,557 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) [2023-10-12 17:12:13,560 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 [2023-10-12 17:12:13,562 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-10-12 17:12:13,562 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-10-12 17:12:13,589 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 [2023-10-12 17:12:13,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-10-12 17:12:13,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-10-12 17:12:13,593 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) [2023-10-12 17:12:13,602 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2023-10-12 17:12:13,602 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-10-12 17:12:13,617 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 [2023-10-12 17:12:13,633 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2023-10-12 17:12:13,639 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 [2023-10-12 17:12:13,640 INFO L210 LassoAnalysis]: Preferences: [2023-10-12 17:12:13,640 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-10-12 17:12:13,640 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-10-12 17:12:13,640 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-10-12 17:12:13,640 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2023-10-12 17:12:13,640 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-10-12 17:12:13,640 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-10-12 17:12:13,640 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-10-12 17:12:13,640 INFO L133 ssoRankerPreferences]: Filename of dumped script: concurrent_increment_nonterminating2.bpl_BEv2_Iteration2_Loop [2023-10-12 17:12:13,641 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-10-12 17:12:13,641 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-10-12 17:12:13,642 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-10-12 17:12:13,660 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-10-12 17:12:13,660 INFO L490 LassoAnalysis]: Using template 'affine'. [2023-10-12 17:12:13,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-10-12 17:12:13,660 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-10-12 17:12:13,665 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) [2023-10-12 17:12:13,668 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 [2023-10-12 17:12:13,708 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 [2023-10-12 17:12:13,714 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-10-12 17:12:13,715 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-10-12 17:12:13,715 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-10-12 17:12:13,715 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-10-12 17:12:13,715 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-10-12 17:12:13,716 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-10-12 17:12:13,716 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-10-12 17:12:13,718 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2023-10-12 17:12:13,721 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2023-10-12 17:12:13,721 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2023-10-12 17:12:13,721 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-10-12 17:12:13,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-10-12 17:12:13,725 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) [2023-10-12 17:12:13,727 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 [2023-10-12 17:12:13,728 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2023-10-12 17:12:13,729 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2023-10-12 17:12:13,729 INFO L513 LassoAnalysis]: Proved termination. [2023-10-12 17:12:13,729 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(x) = -1*x Supporting invariants [] [2023-10-12 17:12:13,732 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 [2023-10-12 17:12:13,734 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2023-10-12 17:12:13,749 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-10-12 17:12:13,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-10-12 17:12:13,757 INFO L262 TraceCheckSpWp]: Trace formula consists of 11 conjuncts, 2 conjunts are in the unsatisfiable core [2023-10-12 17:12:13,757 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-10-12 17:12:13,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-10-12 17:12:13,768 WARN L260 TraceCheckSpWp]: Trace formula consists of 5 conjuncts, 4 conjunts are in the unsatisfiable core [2023-10-12 17:12:13,769 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-10-12 17:12:13,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-10-12 17:12:13,769 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 [2023-10-12 17:12:13,770 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 9 states and 15 transitions. cyclomatic complexity: 10 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) [2023-10-12 17:12:13,796 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 9 states and 15 transitions. cyclomatic complexity: 10. 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 21 states and 38 transitions. Complement of second has 5 states. [2023-10-12 17:12:13,796 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 [2023-10-12 17:12:13,798 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) [2023-10-12 17:12:13,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 10 transitions. [2023-10-12 17:12:13,798 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 10 transitions. Stem has 4 letters. Loop has 1 letters. [2023-10-12 17:12:13,799 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-10-12 17:12:13,799 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 10 transitions. Stem has 5 letters. Loop has 1 letters. [2023-10-12 17:12:13,799 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-10-12 17:12:13,799 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 10 transitions. Stem has 4 letters. Loop has 2 letters. [2023-10-12 17:12:13,799 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-10-12 17:12:13,799 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 21 states and 38 transitions. [2023-10-12 17:12:13,802 INFO L131 ngComponentsAnalysis]: Automaton has 4 accepting balls. 4 [2023-10-12 17:12:13,803 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 21 states to 11 states and 20 transitions. [2023-10-12 17:12:13,804 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 8 [2023-10-12 17:12:13,805 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 10 [2023-10-12 17:12:13,805 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 20 transitions. [2023-10-12 17:12:13,805 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-10-12 17:12:13,805 INFO L219 hiAutomatonCegarLoop]: Abstraction has 11 states and 20 transitions. [2023-10-12 17:12:13,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states and 20 transitions. [2023-10-12 17:12:13,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 9. [2023-10-12 17:12:13,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 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) [2023-10-12 17:12:13,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 15 transitions. [2023-10-12 17:12:13,807 INFO L241 hiAutomatonCegarLoop]: Abstraction has 9 states and 15 transitions. [2023-10-12 17:12:13,808 INFO L430 stractBuchiCegarLoop]: Abstraction has 9 states and 15 transitions. [2023-10-12 17:12:13,808 INFO L337 stractBuchiCegarLoop]: ======== Iteration 3 ============ [2023-10-12 17:12:13,808 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 9 states and 15 transitions. [2023-10-12 17:12:13,809 INFO L131 ngComponentsAnalysis]: Automaton has 4 accepting balls. 4 [2023-10-12 17:12:13,809 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2023-10-12 17:12:13,809 INFO L119 BuchiIsEmpty]: Starting construction of run [2023-10-12 17:12:13,809 INFO L149 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1] [2023-10-12 17:12:13,809 INFO L150 hiAutomatonCegarLoop]: Counterexample loop histogram [1] [2023-10-12 17:12:13,810 INFO L748 eck$LassoCheckResult]: Stem: 235#[$Ultimate##0]don't care [28] $Ultimate##0-->L15: Formula: (= (+ 2 v_x_5) 0) InVars {} OutVars{x=v_x_5} AuxVars[] AssignedVars[x] 237#[L15]don't care [44] L15-->L24: Formula: (= v_decThread1of1ForFork0_thidvar0_2 1) InVars {} OutVars{decThread1of1ForFork0_thidvar0=v_decThread1of1ForFork0_thidvar0_2} AuxVars[] AssignedVars[decThread1of1ForFork0_thidvar0] 231#[L24, L15-1]don't care [47] L15-1-->L32: Formula: (and (= 2 v_incThread1of1ForFork1_thidvar0_2) (= 2 v_incThread1of1ForFork1_thidvar1_2)) InVars {} OutVars{incThread1of1ForFork1_thidvar0=v_incThread1of1ForFork1_thidvar0_2, incThread1of1ForFork1_thidvar1=v_incThread1of1ForFork1_thidvar1_2} AuxVars[] AssignedVars[incThread1of1ForFork1_thidvar0, incThread1of1ForFork1_thidvar1] 233#[L16, L32, L24]don't care [51] L32-->L32: Formula: (and (< v_x_21 0) (= (+ v_x_21 1) v_x_20)) InVars {x=v_x_21} OutVars{x=v_x_20} AuxVars[] AssignedVars[x] 229#[L16, L32, L24]don't care [50] L32-->incEXIT: Formula: (<= 0 v_x_14) InVars {x=v_x_14} OutVars{x=v_x_14} AuxVars[] AssignedVars[] 225#[L16, incEXIT, L24]don't care [2023-10-12 17:12:13,810 INFO L750 eck$LassoCheckResult]: Loop: 225#[L16, incEXIT, L24]don't care [53] L24-->L24: Formula: (and (= v_x_35 (+ v_x_34 1)) (< 0 (+ v_x_35 1))) InVars {x=v_x_35} OutVars{x=v_x_34} AuxVars[] AssignedVars[x] 225#[L16, incEXIT, L24]don't care [2023-10-12 17:12:13,811 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-10-12 17:12:13,811 INFO L85 PathProgramCache]: Analyzing trace with hash 55845341, now seen corresponding path program 1 times [2023-10-12 17:12:13,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-10-12 17:12:13,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023677101] [2023-10-12 17:12:13,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-10-12 17:12:13,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-10-12 17:12:13,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-10-12 17:12:13,861 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-10-12 17:12:13,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-10-12 17:12:13,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023677101] [2023-10-12 17:12:13,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023677101] provided 0 perfect and 1 imperfect interpolant sequences [2023-10-12 17:12:13,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869380477] [2023-10-12 17:12:13,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-10-12 17:12:13,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-10-12 17:12:13,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-10-12 17:12:13,865 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-10-12 17:12:13,867 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-10-12 17:12:13,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-10-12 17:12:13,890 INFO L262 TraceCheckSpWp]: Trace formula consists of 14 conjuncts, 3 conjunts are in the unsatisfiable core [2023-10-12 17:12:13,890 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-10-12 17:12:13,922 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-10-12 17:12:13,922 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-10-12 17:12:13,941 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-10-12 17:12:13,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [869380477] provided 0 perfect and 2 imperfect interpolant sequences [2023-10-12 17:12:13,942 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-10-12 17:12:13,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 2 [2023-10-12 17:12:13,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60902895] [2023-10-12 17:12:13,942 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-10-12 17:12:13,943 INFO L753 eck$LassoCheckResult]: stem already infeasible [2023-10-12 17:12:13,943 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-10-12 17:12:13,944 INFO L85 PathProgramCache]: Analyzing trace with hash 84, now seen corresponding path program 2 times [2023-10-12 17:12:13,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-10-12 17:12:13,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652207569] [2023-10-12 17:12:13,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-10-12 17:12:13,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-10-12 17:12:13,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-10-12 17:12:13,952 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-10-12 17:12:13,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-10-12 17:12:13,959 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-10-12 17:12:13,975 INFO L210 LassoAnalysis]: Preferences: [2023-10-12 17:12:13,975 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-10-12 17:12:13,975 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-10-12 17:12:13,975 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-10-12 17:12:13,975 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2023-10-12 17:12:13,975 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-10-12 17:12:13,975 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-10-12 17:12:13,975 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-10-12 17:12:13,975 INFO L133 ssoRankerPreferences]: Filename of dumped script: concurrent_increment_nonterminating2.bpl_BEv2_Iteration3_Loop [2023-10-12 17:12:13,975 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-10-12 17:12:13,976 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-10-12 17:12:13,976 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-10-12 17:12:13,997 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-10-12 17:12:13,997 INFO L404 LassoAnalysis]: Checking for nontermination... [2023-10-12 17:12:13,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-10-12 17:12:13,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-10-12 17:12:14,005 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) [2023-10-12 17:12:14,010 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-10-12 17:12:14,010 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-10-12 17:12:14,020 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 [2023-10-12 17:12:14,027 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 [2023-10-12 17:12:14,028 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-10-12 17:12:14,028 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-10-12 17:12:14,029 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) [2023-10-12 17:12:14,030 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 [2023-10-12 17:12:14,032 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2023-10-12 17:12:14,032 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-10-12 17:12:14,045 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2023-10-12 17:12:14,051 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Forceful destruction successful, exit code 0 [2023-10-12 17:12:14,051 INFO L210 LassoAnalysis]: Preferences: [2023-10-12 17:12:14,051 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-10-12 17:12:14,052 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-10-12 17:12:14,052 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-10-12 17:12:14,052 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2023-10-12 17:12:14,052 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-10-12 17:12:14,052 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-10-12 17:12:14,052 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-10-12 17:12:14,052 INFO L133 ssoRankerPreferences]: Filename of dumped script: concurrent_increment_nonterminating2.bpl_BEv2_Iteration3_Loop [2023-10-12 17:12:14,052 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-10-12 17:12:14,052 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-10-12 17:12:14,053 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-10-12 17:12:14,071 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-10-12 17:12:14,071 INFO L490 LassoAnalysis]: Using template 'affine'. [2023-10-12 17:12:14,072 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-10-12 17:12:14,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-10-12 17:12:14,073 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) [2023-10-12 17:12:14,074 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 [2023-10-12 17:12:14,077 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 [2023-10-12 17:12:14,083 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-10-12 17:12:14,083 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-10-12 17:12:14,083 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-10-12 17:12:14,084 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-10-12 17:12:14,084 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-10-12 17:12:14,085 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-10-12 17:12:14,085 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-10-12 17:12:14,087 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2023-10-12 17:12:14,105 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2023-10-12 17:12:14,106 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. [2023-10-12 17:12:14,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-10-12 17:12:14,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-10-12 17:12:14,107 INFO L229 MonitoredProcess]: Starting monitored process 14 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) [2023-10-12 17:12:14,109 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (14)] Waiting until timeout for monitored process [2023-10-12 17:12:14,110 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2023-10-12 17:12:14,110 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2023-10-12 17:12:14,111 INFO L513 LassoAnalysis]: Proved termination. [2023-10-12 17:12:14,111 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(x) = 2*x + 1 Supporting invariants [] [2023-10-12 17:12:14,120 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 [2023-10-12 17:12:14,122 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2023-10-12 17:12:14,137 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-10-12 17:12:14,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-10-12 17:12:14,144 INFO L262 TraceCheckSpWp]: Trace formula consists of 14 conjuncts, 2 conjunts are in the unsatisfiable core [2023-10-12 17:12:14,145 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-10-12 17:12:14,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-10-12 17:12:14,155 WARN L260 TraceCheckSpWp]: Trace formula consists of 5 conjuncts, 4 conjunts are in the unsatisfiable core [2023-10-12 17:12:14,155 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-10-12 17:12:14,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-10-12 17:12:14,156 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 [2023-10-12 17:12:14,156 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 9 states and 15 transitions. cyclomatic complexity: 11 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) [2023-10-12 17:12:14,168 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 9 states and 15 transitions. cyclomatic complexity: 11. 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 10 states and 16 transitions. Complement of second has 2 states. [2023-10-12 17:12:14,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 2 states 1 stem states 0 non-accepting loop states 1 accepting loop states [2023-10-12 17:12:14,169 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) [2023-10-12 17:12:14,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 9 transitions. [2023-10-12 17:12:14,170 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 2 states and 9 transitions. Stem has 5 letters. Loop has 1 letters. [2023-10-12 17:12:14,170 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-10-12 17:12:14,170 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 2 states and 9 transitions. Stem has 6 letters. Loop has 1 letters. [2023-10-12 17:12:14,170 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-10-12 17:12:14,170 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 2 states and 9 transitions. Stem has 5 letters. Loop has 2 letters. [2023-10-12 17:12:14,171 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-10-12 17:12:14,171 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 10 states and 16 transitions. [2023-10-12 17:12:14,171 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 3 [2023-10-12 17:12:14,171 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 10 states to 8 states and 12 transitions. [2023-10-12 17:12:14,172 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 7 [2023-10-12 17:12:14,172 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 7 [2023-10-12 17:12:14,172 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 12 transitions. [2023-10-12 17:12:14,172 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-10-12 17:12:14,172 INFO L219 hiAutomatonCegarLoop]: Abstraction has 8 states and 12 transitions. [2023-10-12 17:12:14,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states and 12 transitions. [2023-10-12 17:12:14,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2023-10-12 17:12:14,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 8 states have (on average 1.5) internal successors, (12), 7 states have internal predecessors, (12), 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) [2023-10-12 17:12:14,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 12 transitions. [2023-10-12 17:12:14,174 INFO L241 hiAutomatonCegarLoop]: Abstraction has 8 states and 12 transitions. [2023-10-12 17:12:14,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-10-12 17:12:14,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-10-12 17:12:14,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-10-12 17:12:14,175 INFO L87 Difference]: Start difference. First operand 8 states and 12 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 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) [2023-10-12 17:12:14,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-10-12 17:12:14,193 INFO L93 Difference]: Finished difference Result 11 states and 16 transitions. [2023-10-12 17:12:14,193 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 11 states and 16 transitions. [2023-10-12 17:12:14,195 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 3 [2023-10-12 17:12:14,195 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 11 states to 11 states and 16 transitions. [2023-10-12 17:12:14,195 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 9 [2023-10-12 17:12:14,195 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 9 [2023-10-12 17:12:14,196 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 16 transitions. [2023-10-12 17:12:14,196 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-10-12 17:12:14,196 INFO L219 hiAutomatonCegarLoop]: Abstraction has 11 states and 16 transitions. [2023-10-12 17:12:14,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states and 16 transitions. [2023-10-12 17:12:14,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 9. [2023-10-12 17:12:14,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 8 states have internal predecessors, (13), 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) [2023-10-12 17:12:14,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 13 transitions. [2023-10-12 17:12:14,198 INFO L241 hiAutomatonCegarLoop]: Abstraction has 9 states and 13 transitions. [2023-10-12 17:12:14,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-10-12 17:12:14,201 INFO L430 stractBuchiCegarLoop]: Abstraction has 9 states and 13 transitions. [2023-10-12 17:12:14,201 INFO L337 stractBuchiCegarLoop]: ======== Iteration 4 ============ [2023-10-12 17:12:14,201 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 9 states and 13 transitions. [2023-10-12 17:12:14,202 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 3 [2023-10-12 17:12:14,202 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2023-10-12 17:12:14,202 INFO L119 BuchiIsEmpty]: Starting construction of run [2023-10-12 17:12:14,203 INFO L149 hiAutomatonCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1] [2023-10-12 17:12:14,203 INFO L150 hiAutomatonCegarLoop]: Counterexample loop histogram [1] [2023-10-12 17:12:14,204 INFO L748 eck$LassoCheckResult]: Stem: 347#[$Ultimate##0]don't care [28] $Ultimate##0-->L15: Formula: (= (+ 2 v_x_5) 0) InVars {} OutVars{x=v_x_5} AuxVars[] AssignedVars[x] 349#[L15]don't care [44] L15-->L24: Formula: (= v_decThread1of1ForFork0_thidvar0_2 1) InVars {} OutVars{decThread1of1ForFork0_thidvar0=v_decThread1of1ForFork0_thidvar0_2} AuxVars[] AssignedVars[decThread1of1ForFork0_thidvar0] 343#[L24, L15-1]don't care [47] L15-1-->L32: Formula: (and (= 2 v_incThread1of1ForFork1_thidvar0_2) (= 2 v_incThread1of1ForFork1_thidvar1_2)) InVars {} OutVars{incThread1of1ForFork1_thidvar0=v_incThread1of1ForFork1_thidvar0_2, incThread1of1ForFork1_thidvar1=v_incThread1of1ForFork1_thidvar1_2} AuxVars[] AssignedVars[incThread1of1ForFork1_thidvar0, incThread1of1ForFork1_thidvar1] 345#[L16, L32, L24]don't care [51] L32-->L32: Formula: (and (< v_x_21 0) (= (+ v_x_21 1) v_x_20)) InVars {x=v_x_21} OutVars{x=v_x_20} AuxVars[] AssignedVars[x] 339#[L16, L32, L24]don't care [51] L32-->L32: Formula: (and (< v_x_21 0) (= (+ v_x_21 1) v_x_20)) InVars {x=v_x_21} OutVars{x=v_x_20} AuxVars[] AssignedVars[x] 341#[L16, L32, L24]don't care [53] L24-->L24: Formula: (and (= v_x_35 (+ v_x_34 1)) (< 0 (+ v_x_35 1))) InVars {x=v_x_35} OutVars{x=v_x_34} AuxVars[] AssignedVars[x] 335#[L16, L32, L24]don't care [2023-10-12 17:12:14,233 INFO L750 eck$LassoCheckResult]: Loop: 335#[L16, L32, L24]don't care [51] L32-->L32: Formula: (and (< v_x_21 0) (= (+ v_x_21 1) v_x_20)) InVars {x=v_x_21} OutVars{x=v_x_20} AuxVars[] AssignedVars[x] 335#[L16, L32, L24]don't care [2023-10-12 17:12:14,234 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-10-12 17:12:14,234 INFO L85 PathProgramCache]: Analyzing trace with hash 1731205655, now seen corresponding path program 1 times [2023-10-12 17:12:14,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-10-12 17:12:14,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802483137] [2023-10-12 17:12:14,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-10-12 17:12:14,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-10-12 17:12:14,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-10-12 17:12:14,274 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-10-12 17:12:14,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-10-12 17:12:14,282 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-10-12 17:12:14,282 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-10-12 17:12:14,282 INFO L85 PathProgramCache]: Analyzing trace with hash 82, now seen corresponding path program 2 times [2023-10-12 17:12:14,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-10-12 17:12:14,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352763821] [2023-10-12 17:12:14,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-10-12 17:12:14,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-10-12 17:12:14,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-10-12 17:12:14,286 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-10-12 17:12:14,287 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 [2023-10-12 17:12:14,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-10-12 17:12:14,291 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-10-12 17:12:14,291 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-10-12 17:12:14,291 INFO L85 PathProgramCache]: Analyzing trace with hash 2127767804, now seen corresponding path program 2 times [2023-10-12 17:12:14,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-10-12 17:12:14,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383421562] [2023-10-12 17:12:14,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-10-12 17:12:14,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-10-12 17:12:14,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-10-12 17:12:14,297 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-10-12 17:12:14,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-10-12 17:12:14,306 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-10-12 17:12:14,316 INFO L210 LassoAnalysis]: Preferences: [2023-10-12 17:12:14,317 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-10-12 17:12:14,317 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-10-12 17:12:14,317 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-10-12 17:12:14,317 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2023-10-12 17:12:14,317 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-10-12 17:12:14,317 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-10-12 17:12:14,317 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-10-12 17:12:14,317 INFO L133 ssoRankerPreferences]: Filename of dumped script: concurrent_increment_nonterminating2.bpl_BEv2_Iteration4_Loop [2023-10-12 17:12:14,317 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-10-12 17:12:14,317 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-10-12 17:12:14,318 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-10-12 17:12:14,320 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 [2023-10-12 17:12:14,331 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (14)] Ended with exit code 0 [2023-10-12 17:12:14,346 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-10-12 17:12:14,346 INFO L404 LassoAnalysis]: Checking for nontermination... [2023-10-12 17:12:14,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-10-12 17:12:14,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-10-12 17:12:14,348 INFO L229 MonitoredProcess]: Starting monitored process 15 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) [2023-10-12 17:12:14,350 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Waiting until timeout for monitored process [2023-10-12 17:12:14,351 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-10-12 17:12:14,352 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-10-12 17:12:14,378 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Forceful destruction successful, exit code 0 [2023-10-12 17:12:14,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-10-12 17:12:14,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-10-12 17:12:14,381 INFO L229 MonitoredProcess]: Starting monitored process 16 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) [2023-10-12 17:12:14,388 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (16)] Waiting until timeout for monitored process [2023-10-12 17:12:14,390 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2023-10-12 17:12:14,390 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-10-12 17:12:14,429 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2023-10-12 17:12:14,436 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (16)] Forceful destruction successful, exit code 0 [2023-10-12 17:12:14,436 INFO L210 LassoAnalysis]: Preferences: [2023-10-12 17:12:14,436 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-10-12 17:12:14,436 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-10-12 17:12:14,436 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-10-12 17:12:14,436 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2023-10-12 17:12:14,436 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-10-12 17:12:14,437 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-10-12 17:12:14,437 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-10-12 17:12:14,437 INFO L133 ssoRankerPreferences]: Filename of dumped script: concurrent_increment_nonterminating2.bpl_BEv2_Iteration4_Loop [2023-10-12 17:12:14,437 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-10-12 17:12:14,437 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-10-12 17:12:14,438 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-10-12 17:12:14,454 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-10-12 17:12:14,455 INFO L490 LassoAnalysis]: Using template 'affine'. [2023-10-12 17:12:14,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-10-12 17:12:14,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-10-12 17:12:14,457 INFO L229 MonitoredProcess]: Starting monitored process 17 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) [2023-10-12 17:12:14,467 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (17)] Waiting until timeout for monitored process [2023-10-12 17:12:14,468 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 [2023-10-12 17:12:14,475 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-10-12 17:12:14,475 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-10-12 17:12:14,476 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-10-12 17:12:14,476 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-10-12 17:12:14,476 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-10-12 17:12:14,478 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-10-12 17:12:14,478 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-10-12 17:12:14,492 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2023-10-12 17:12:14,494 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2023-10-12 17:12:14,494 INFO L444 ModelExtractionUtils]: 1 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. [2023-10-12 17:12:14,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-10-12 17:12:14,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-10-12 17:12:14,497 INFO L229 MonitoredProcess]: Starting monitored process 18 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) [2023-10-12 17:12:14,508 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2023-10-12 17:12:14,509 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2023-10-12 17:12:14,509 INFO L513 LassoAnalysis]: Proved termination. [2023-10-12 17:12:14,509 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(x) = -1*x Supporting invariants [] [2023-10-12 17:12:14,512 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (18)] Waiting until timeout for monitored process [2023-10-12 17:12:14,514 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (17)] Forceful destruction successful, exit code 0 [2023-10-12 17:12:14,515 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2023-10-12 17:12:14,526 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-10-12 17:12:14,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-10-12 17:12:14,535 INFO L262 TraceCheckSpWp]: Trace formula consists of 19 conjuncts, 2 conjunts are in the unsatisfiable core [2023-10-12 17:12:14,535 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-10-12 17:12:14,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-10-12 17:12:14,547 WARN L260 TraceCheckSpWp]: Trace formula consists of 5 conjuncts, 4 conjunts are in the unsatisfiable core [2023-10-12 17:12:14,547 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-10-12 17:12:14,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-10-12 17:12:14,549 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 [2023-10-12 17:12:14,549 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 9 states and 13 transitions. cyclomatic complexity: 8 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) [2023-10-12 17:12:14,573 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 9 states and 13 transitions. cyclomatic complexity: 8. 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 19 states and 32 transitions. Complement of second has 5 states. [2023-10-12 17:12:14,573 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 [2023-10-12 17:12:14,575 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) [2023-10-12 17:12:14,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 10 transitions. [2023-10-12 17:12:14,575 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 10 transitions. Stem has 6 letters. Loop has 1 letters. [2023-10-12 17:12:14,575 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-10-12 17:12:14,575 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 10 transitions. Stem has 7 letters. Loop has 1 letters. [2023-10-12 17:12:14,576 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-10-12 17:12:14,576 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 10 transitions. Stem has 6 letters. Loop has 2 letters. [2023-10-12 17:12:14,576 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-10-12 17:12:14,576 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 19 states and 32 transitions. [2023-10-12 17:12:14,577 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 3 [2023-10-12 17:12:14,577 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 19 states to 12 states and 20 transitions. [2023-10-12 17:12:14,577 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 8 [2023-10-12 17:12:14,577 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 9 [2023-10-12 17:12:14,577 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 20 transitions. [2023-10-12 17:12:14,578 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-10-12 17:12:14,578 INFO L219 hiAutomatonCegarLoop]: Abstraction has 12 states and 20 transitions. [2023-10-12 17:12:14,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states and 20 transitions. [2023-10-12 17:12:14,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 11. [2023-10-12 17:12:14,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 10 states have internal predecessors, (17), 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) [2023-10-12 17:12:14,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 17 transitions. [2023-10-12 17:12:14,580 INFO L241 hiAutomatonCegarLoop]: Abstraction has 11 states and 17 transitions. [2023-10-12 17:12:14,580 INFO L430 stractBuchiCegarLoop]: Abstraction has 11 states and 17 transitions. [2023-10-12 17:12:14,581 INFO L337 stractBuchiCegarLoop]: ======== Iteration 5 ============ [2023-10-12 17:12:14,581 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 11 states and 17 transitions. [2023-10-12 17:12:14,581 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 3 [2023-10-12 17:12:14,581 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2023-10-12 17:12:14,581 INFO L119 BuchiIsEmpty]: Starting construction of run [2023-10-12 17:12:14,582 INFO L149 hiAutomatonCegarLoop]: Counterexample stem histogram [2, 2, 1, 1, 1] [2023-10-12 17:12:14,582 INFO L150 hiAutomatonCegarLoop]: Counterexample loop histogram [1] [2023-10-12 17:12:14,582 INFO L748 eck$LassoCheckResult]: Stem: 420#[$Ultimate##0]don't care [28] $Ultimate##0-->L15: Formula: (= (+ 2 v_x_5) 0) InVars {} OutVars{x=v_x_5} AuxVars[] AssignedVars[x] 422#[L15]don't care [44] L15-->L24: Formula: (= v_decThread1of1ForFork0_thidvar0_2 1) InVars {} OutVars{decThread1of1ForFork0_thidvar0=v_decThread1of1ForFork0_thidvar0_2} AuxVars[] AssignedVars[decThread1of1ForFork0_thidvar0] 418#[L24, L15-1]don't care [47] L15-1-->L32: Formula: (and (= 2 v_incThread1of1ForFork1_thidvar0_2) (= 2 v_incThread1of1ForFork1_thidvar1_2)) InVars {} OutVars{incThread1of1ForFork1_thidvar0=v_incThread1of1ForFork1_thidvar0_2, incThread1of1ForFork1_thidvar1=v_incThread1of1ForFork1_thidvar1_2} AuxVars[] AssignedVars[incThread1of1ForFork1_thidvar0, incThread1of1ForFork1_thidvar1] 412#[L16, L32, L24]don't care [51] L32-->L32: Formula: (and (< v_x_21 0) (= (+ v_x_21 1) v_x_20)) InVars {x=v_x_21} OutVars{x=v_x_20} AuxVars[] AssignedVars[x] 414#[L16, L32, L24]don't care [51] L32-->L32: Formula: (and (< v_x_21 0) (= (+ v_x_21 1) v_x_20)) InVars {x=v_x_21} OutVars{x=v_x_20} AuxVars[] AssignedVars[x] 416#[L16, L32, L24]don't care [53] L24-->L24: Formula: (and (= v_x_35 (+ v_x_34 1)) (< 0 (+ v_x_35 1))) InVars {x=v_x_35} OutVars{x=v_x_34} AuxVars[] AssignedVars[x] 432#[L16, L32, L24]don't care [53] L24-->L24: Formula: (and (= v_x_35 (+ v_x_34 1)) (< 0 (+ v_x_35 1))) InVars {x=v_x_35} OutVars{x=v_x_34} AuxVars[] AssignedVars[x] 428#[L16, L32, L24]don't care [2023-10-12 17:12:14,582 INFO L750 eck$LassoCheckResult]: Loop: 428#[L16, L32, L24]don't care [51] L32-->L32: Formula: (and (< v_x_21 0) (= (+ v_x_21 1) v_x_20)) InVars {x=v_x_21} OutVars{x=v_x_20} AuxVars[] AssignedVars[x] 428#[L16, L32, L24]don't care [2023-10-12 17:12:14,583 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-10-12 17:12:14,583 INFO L85 PathProgramCache]: Analyzing trace with hash 2127767806, now seen corresponding path program 3 times [2023-10-12 17:12:14,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-10-12 17:12:14,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884492578] [2023-10-12 17:12:14,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-10-12 17:12:14,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-10-12 17:12:14,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-10-12 17:12:14,636 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-10-12 17:12:14,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-10-12 17:12:14,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884492578] [2023-10-12 17:12:14,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884492578] provided 1 perfect and 0 imperfect interpolant sequences [2023-10-12 17:12:14,637 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-10-12 17:12:14,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-10-12 17:12:14,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271349744] [2023-10-12 17:12:14,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-10-12 17:12:14,637 INFO L753 eck$LassoCheckResult]: stem already infeasible [2023-10-12 17:12:14,638 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-10-12 17:12:14,638 INFO L85 PathProgramCache]: Analyzing trace with hash 82, now seen corresponding path program 3 times [2023-10-12 17:12:14,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-10-12 17:12:14,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549073815] [2023-10-12 17:12:14,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-10-12 17:12:14,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-10-12 17:12:14,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-10-12 17:12:14,641 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-10-12 17:12:14,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-10-12 17:12:14,642 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-10-12 17:12:14,653 INFO L210 LassoAnalysis]: Preferences: [2023-10-12 17:12:14,653 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-10-12 17:12:14,653 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-10-12 17:12:14,653 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-10-12 17:12:14,653 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2023-10-12 17:12:14,653 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-10-12 17:12:14,654 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-10-12 17:12:14,654 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-10-12 17:12:14,654 INFO L133 ssoRankerPreferences]: Filename of dumped script: concurrent_increment_nonterminating2.bpl_BEv2_Iteration5_Loop [2023-10-12 17:12:14,654 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-10-12 17:12:14,654 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-10-12 17:12:14,654 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-10-12 17:12:14,669 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-10-12 17:12:14,669 INFO L404 LassoAnalysis]: Checking for nontermination... [2023-10-12 17:12:14,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-10-12 17:12:14,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-10-12 17:12:14,671 INFO L229 MonitoredProcess]: Starting monitored process 19 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) [2023-10-12 17:12:14,682 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-10-12 17:12:14,683 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-10-12 17:12:14,692 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (19)] Waiting until timeout for monitored process [2023-10-12 17:12:14,710 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (19)] Forceful destruction successful, exit code 0 [2023-10-12 17:12:14,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-10-12 17:12:14,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-10-12 17:12:14,712 INFO L229 MonitoredProcess]: Starting monitored process 20 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) [2023-10-12 17:12:14,715 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (20)] Waiting until timeout for monitored process [2023-10-12 17:12:14,716 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2023-10-12 17:12:14,716 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-10-12 17:12:14,746 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2023-10-12 17:12:14,752 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (20)] Forceful destruction successful, exit code 0 [2023-10-12 17:12:14,753 INFO L210 LassoAnalysis]: Preferences: [2023-10-12 17:12:14,753 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-10-12 17:12:14,753 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-10-12 17:12:14,753 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-10-12 17:12:14,753 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2023-10-12 17:12:14,753 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-10-12 17:12:14,753 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-10-12 17:12:14,753 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-10-12 17:12:14,753 INFO L133 ssoRankerPreferences]: Filename of dumped script: concurrent_increment_nonterminating2.bpl_BEv2_Iteration5_Loop [2023-10-12 17:12:14,753 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-10-12 17:12:14,753 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-10-12 17:12:14,754 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-10-12 17:12:14,773 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-10-12 17:12:14,773 INFO L490 LassoAnalysis]: Using template 'affine'. [2023-10-12 17:12:14,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-10-12 17:12:14,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-10-12 17:12:14,775 INFO L229 MonitoredProcess]: Starting monitored process 21 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) [2023-10-12 17:12:14,786 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 [2023-10-12 17:12:14,793 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-10-12 17:12:14,793 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-10-12 17:12:14,793 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-10-12 17:12:14,793 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-10-12 17:12:14,793 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-10-12 17:12:14,794 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-10-12 17:12:14,794 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-10-12 17:12:14,797 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (21)] Waiting until timeout for monitored process [2023-10-12 17:12:14,801 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2023-10-12 17:12:14,803 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2023-10-12 17:12:14,803 INFO L444 ModelExtractionUtils]: 1 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. [2023-10-12 17:12:14,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-10-12 17:12:14,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-10-12 17:12:14,804 INFO L229 MonitoredProcess]: Starting monitored process 22 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) [2023-10-12 17:12:14,819 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2023-10-12 17:12:14,819 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2023-10-12 17:12:14,819 INFO L513 LassoAnalysis]: Proved termination. [2023-10-12 17:12:14,819 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(x) = -1*x Supporting invariants [] [2023-10-12 17:12:14,822 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (22)] Waiting until timeout for monitored process [2023-10-12 17:12:14,823 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (21)] Forceful destruction successful, exit code 0 [2023-10-12 17:12:14,823 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2023-10-12 17:12:14,837 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-10-12 17:12:14,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-10-12 17:12:14,846 INFO L262 TraceCheckSpWp]: Trace formula consists of 22 conjuncts, 2 conjunts are in the unsatisfiable core [2023-10-12 17:12:14,847 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-10-12 17:12:14,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-10-12 17:12:14,866 WARN L260 TraceCheckSpWp]: Trace formula consists of 5 conjuncts, 4 conjunts are in the unsatisfiable core [2023-10-12 17:12:14,866 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-10-12 17:12:14,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-10-12 17:12:14,867 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 [2023-10-12 17:12:14,868 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 11 states and 17 transitions. cyclomatic complexity: 11 Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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) [2023-10-12 17:12:14,883 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 11 states and 17 transitions. cyclomatic complexity: 11. Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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 12 states and 20 transitions. Complement of second has 3 states. [2023-10-12 17:12:14,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 2 states 1 stem states 0 non-accepting loop states 1 accepting loop states [2023-10-12 17:12:14,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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) [2023-10-12 17:12:14,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 6 transitions. [2023-10-12 17:12:14,886 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 2 states and 6 transitions. Stem has 7 letters. Loop has 1 letters. [2023-10-12 17:12:14,887 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-10-12 17:12:14,887 INFO L682 stractBuchiCegarLoop]: Bad chosen interpolant automaton: word not accepted [2023-10-12 17:12:14,900 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-10-12 17:12:14,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-10-12 17:12:14,909 INFO L262 TraceCheckSpWp]: Trace formula consists of 22 conjuncts, 2 conjunts are in the unsatisfiable core [2023-10-12 17:12:14,910 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-10-12 17:12:14,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-10-12 17:12:14,941 WARN L260 TraceCheckSpWp]: Trace formula consists of 5 conjuncts, 4 conjunts are in the unsatisfiable core [2023-10-12 17:12:14,941 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-10-12 17:12:14,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-10-12 17:12:14,942 INFO L141 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.1 stem predicates 1 loop predicates [2023-10-12 17:12:14,942 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 11 states and 17 transitions. cyclomatic complexity: 11 Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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) [2023-10-12 17:12:14,952 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 11 states and 17 transitions. cyclomatic complexity: 11. Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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 12 states and 20 transitions. Complement of second has 3 states. [2023-10-12 17:12:14,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 2 states 1 stem states 0 non-accepting loop states 1 accepting loop states [2023-10-12 17:12:14,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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) [2023-10-12 17:12:14,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 6 transitions. [2023-10-12 17:12:14,955 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 2 states and 6 transitions. Stem has 7 letters. Loop has 1 letters. [2023-10-12 17:12:14,956 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-10-12 17:12:14,956 INFO L682 stractBuchiCegarLoop]: Bad chosen interpolant automaton: word not accepted [2023-10-12 17:12:14,965 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-10-12 17:12:14,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-10-12 17:12:14,972 INFO L262 TraceCheckSpWp]: Trace formula consists of 22 conjuncts, 2 conjunts are in the unsatisfiable core [2023-10-12 17:12:14,972 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-10-12 17:12:14,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-10-12 17:12:14,985 WARN L260 TraceCheckSpWp]: Trace formula consists of 5 conjuncts, 4 conjunts are in the unsatisfiable core [2023-10-12 17:12:14,986 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-10-12 17:12:14,986 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-10-12 17:12:14,986 INFO L141 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.1 stem predicates 1 loop predicates [2023-10-12 17:12:14,986 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 11 states and 17 transitions. cyclomatic complexity: 11 Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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) [2023-10-12 17:12:15,008 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 11 states and 17 transitions. cyclomatic complexity: 11. Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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 20 states and 34 transitions. Complement of second has 5 states. [2023-10-12 17:12:15,008 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 [2023-10-12 17:12:15,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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) [2023-10-12 17:12:15,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 13 transitions. [2023-10-12 17:12:15,010 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 13 transitions. Stem has 7 letters. Loop has 1 letters. [2023-10-12 17:12:15,010 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-10-12 17:12:15,011 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 13 transitions. Stem has 8 letters. Loop has 1 letters. [2023-10-12 17:12:15,011 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-10-12 17:12:15,011 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 13 transitions. Stem has 7 letters. Loop has 2 letters. [2023-10-12 17:12:15,011 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-10-12 17:12:15,011 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 20 states and 34 transitions. [2023-10-12 17:12:15,013 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2023-10-12 17:12:15,014 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 20 states to 11 states and 17 transitions. [2023-10-12 17:12:15,014 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 6 [2023-10-12 17:12:15,014 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 7 [2023-10-12 17:12:15,014 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 17 transitions. [2023-10-12 17:12:15,015 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-10-12 17:12:15,015 INFO L219 hiAutomatonCegarLoop]: Abstraction has 11 states and 17 transitions. [2023-10-12 17:12:15,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states and 17 transitions. [2023-10-12 17:12:15,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 9. [2023-10-12 17:12:15,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 8 states have internal predecessors, (13), 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) [2023-10-12 17:12:15,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 13 transitions. [2023-10-12 17:12:15,017 INFO L241 hiAutomatonCegarLoop]: Abstraction has 9 states and 13 transitions. [2023-10-12 17:12:15,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-10-12 17:12:15,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-10-12 17:12:15,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-10-12 17:12:15,017 INFO L87 Difference]: Start difference. First operand 9 states and 13 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 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) [2023-10-12 17:12:15,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-10-12 17:12:15,027 INFO L93 Difference]: Finished difference Result 10 states and 13 transitions. [2023-10-12 17:12:15,027 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 10 states and 13 transitions. [2023-10-12 17:12:15,029 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2023-10-12 17:12:15,030 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 10 states to 10 states and 13 transitions. [2023-10-12 17:12:15,030 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 7 [2023-10-12 17:12:15,030 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 7 [2023-10-12 17:12:15,030 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 13 transitions. [2023-10-12 17:12:15,031 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-10-12 17:12:15,031 INFO L219 hiAutomatonCegarLoop]: Abstraction has 10 states and 13 transitions. [2023-10-12 17:12:15,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states and 13 transitions. [2023-10-12 17:12:15,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2023-10-12 17:12:15,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 10 states have (on average 1.3) internal successors, (13), 9 states have internal predecessors, (13), 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) [2023-10-12 17:12:15,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 13 transitions. [2023-10-12 17:12:15,033 INFO L241 hiAutomatonCegarLoop]: Abstraction has 10 states and 13 transitions. [2023-10-12 17:12:15,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-10-12 17:12:15,034 INFO L430 stractBuchiCegarLoop]: Abstraction has 10 states and 13 transitions. [2023-10-12 17:12:15,034 INFO L337 stractBuchiCegarLoop]: ======== Iteration 6 ============ [2023-10-12 17:12:15,034 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 10 states and 13 transitions. [2023-10-12 17:12:15,034 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2023-10-12 17:12:15,035 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2023-10-12 17:12:15,035 INFO L119 BuchiIsEmpty]: Starting construction of run [2023-10-12 17:12:15,035 INFO L149 hiAutomatonCegarLoop]: Counterexample stem histogram [3, 2, 1, 1, 1] [2023-10-12 17:12:15,035 INFO L150 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1] [2023-10-12 17:12:15,035 INFO L748 eck$LassoCheckResult]: Stem: 611#[$Ultimate##0]don't care [28] $Ultimate##0-->L15: Formula: (= (+ 2 v_x_5) 0) InVars {} OutVars{x=v_x_5} AuxVars[] AssignedVars[x] 613#[L15]don't care [44] L15-->L24: Formula: (= v_decThread1of1ForFork0_thidvar0_2 1) InVars {} OutVars{decThread1of1ForFork0_thidvar0=v_decThread1of1ForFork0_thidvar0_2} AuxVars[] AssignedVars[decThread1of1ForFork0_thidvar0] 607#[L24, L15-1]don't care [47] L15-1-->L32: Formula: (and (= 2 v_incThread1of1ForFork1_thidvar0_2) (= 2 v_incThread1of1ForFork1_thidvar1_2)) InVars {} OutVars{incThread1of1ForFork1_thidvar0=v_incThread1of1ForFork1_thidvar0_2, incThread1of1ForFork1_thidvar1=v_incThread1of1ForFork1_thidvar1_2} AuxVars[] AssignedVars[incThread1of1ForFork1_thidvar0, incThread1of1ForFork1_thidvar1] 609#[L16, L32, L24]don't care [51] L32-->L32: Formula: (and (< v_x_21 0) (= (+ v_x_21 1) v_x_20)) InVars {x=v_x_21} OutVars{x=v_x_20} AuxVars[] AssignedVars[x] 603#[L16, L32, L24]don't care [51] L32-->L32: Formula: (and (< v_x_21 0) (= (+ v_x_21 1) v_x_20)) InVars {x=v_x_21} OutVars{x=v_x_20} AuxVars[] AssignedVars[x] 605#[L16, L32, L24]don't care [53] L24-->L24: Formula: (and (= v_x_35 (+ v_x_34 1)) (< 0 (+ v_x_35 1))) InVars {x=v_x_35} OutVars{x=v_x_34} AuxVars[] AssignedVars[x] 617#[L16, L32, L24]don't care [51] L32-->L32: Formula: (and (< v_x_21 0) (= (+ v_x_21 1) v_x_20)) InVars {x=v_x_21} OutVars{x=v_x_20} AuxVars[] AssignedVars[x] 615#[L16, L32, L24]don't care [53] L24-->L24: Formula: (and (= v_x_35 (+ v_x_34 1)) (< 0 (+ v_x_35 1))) InVars {x=v_x_35} OutVars{x=v_x_34} AuxVars[] AssignedVars[x] 599#[L16, L32, L24]don't care [2023-10-12 17:12:15,036 INFO L750 eck$LassoCheckResult]: Loop: 599#[L16, L32, L24]don't care [51] L32-->L32: Formula: (and (< v_x_21 0) (= (+ v_x_21 1) v_x_20)) InVars {x=v_x_21} OutVars{x=v_x_20} AuxVars[] AssignedVars[x] 601#[L16, L32, L24]don't care [53] L24-->L24: Formula: (and (= v_x_35 (+ v_x_34 1)) (< 0 (+ v_x_35 1))) InVars {x=v_x_35} OutVars{x=v_x_34} AuxVars[] AssignedVars[x] 599#[L16, L32, L24]don't care [2023-10-12 17:12:15,036 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-10-12 17:12:15,036 INFO L85 PathProgramCache]: Analyzing trace with hash 1536292537, now seen corresponding path program 4 times [2023-10-12 17:12:15,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-10-12 17:12:15,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262833508] [2023-10-12 17:12:15,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-10-12 17:12:15,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-10-12 17:12:15,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-10-12 17:12:15,041 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-10-12 17:12:15,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-10-12 17:12:15,046 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-10-12 17:12:15,046 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-10-12 17:12:15,046 INFO L85 PathProgramCache]: Analyzing trace with hash 2595, now seen corresponding path program 1 times [2023-10-12 17:12:15,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-10-12 17:12:15,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384193597] [2023-10-12 17:12:15,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-10-12 17:12:15,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-10-12 17:12:15,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-10-12 17:12:15,050 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-10-12 17:12:15,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-10-12 17:12:15,052 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-10-12 17:12:15,052 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-10-12 17:12:15,052 INFO L85 PathProgramCache]: Analyzing trace with hash -1091620133, now seen corresponding path program 5 times [2023-10-12 17:12:15,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-10-12 17:12:15,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601283895] [2023-10-12 17:12:15,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-10-12 17:12:15,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-10-12 17:12:15,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-10-12 17:12:15,057 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-10-12 17:12:15,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-10-12 17:12:15,061 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-10-12 17:12:15,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-10-12 17:12:15,161 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-10-12 17:12:15,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-10-12 17:12:15,188 INFO L201 PluginConnector]: Adding new model concurrent_increment_nonterminating2.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 12.10 05:12:15 BoogieIcfgContainer [2023-10-12 17:12:15,188 INFO L131 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2023-10-12 17:12:15,190 INFO L158 Benchmark]: Toolchain (without parser) took 3284.17ms. Allocated memory was 187.7MB in the beginning and 268.4MB in the end (delta: 80.7MB). Free memory was 140.1MB in the beginning and 183.3MB in the end (delta: -43.2MB). Peak memory consumption was 36.8MB. Max. memory is 8.0GB. [2023-10-12 17:12:15,191 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.28ms. Allocated memory is still 187.7MB. Free memory is still 141.0MB. There was no memory consumed. Max. memory is 8.0GB. [2023-10-12 17:12:15,191 INFO L158 Benchmark]: Boogie Procedure Inliner took 29.40ms. Allocated memory is still 187.7MB. Free memory was 139.9MB in the beginning and 138.5MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2023-10-12 17:12:15,191 INFO L158 Benchmark]: Boogie Preprocessor took 17.22ms. Allocated memory is still 187.7MB. Free memory was 138.3MB in the beginning and 137.3MB in the end (delta: 970.9kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2023-10-12 17:12:15,192 INFO L158 Benchmark]: RCFGBuilder took 211.53ms. Allocated memory is still 187.7MB. Free memory was 137.3MB in the beginning and 128.9MB in the end (delta: 8.5MB). Peak memory consumption was 8.4MB. Max. memory is 8.0GB. [2023-10-12 17:12:15,192 INFO L158 Benchmark]: BuchiAutomizer took 3020.08ms. Allocated memory was 187.7MB in the beginning and 268.4MB in the end (delta: 80.7MB). Free memory was 128.7MB in the beginning and 183.3MB in the end (delta: -54.6MB). Peak memory consumption was 25.3MB. Max. memory is 8.0GB. [2023-10-12 17:12:15,195 INFO L338 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 0.28ms. Allocated memory is still 187.7MB. Free memory is still 141.0MB. There was no memory consumed. Max. memory is 8.0GB. * Boogie Procedure Inliner took 29.40ms. Allocated memory is still 187.7MB. Free memory was 139.9MB in the beginning and 138.5MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 17.22ms. Allocated memory is still 187.7MB. Free memory was 138.3MB in the beginning and 137.3MB in the end (delta: 970.9kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 211.53ms. Allocated memory is still 187.7MB. Free memory was 137.3MB in the beginning and 128.9MB in the end (delta: 8.5MB). Peak memory consumption was 8.4MB. Max. memory is 8.0GB. * BuchiAutomizer took 3020.08ms. Allocated memory was 187.7MB in the beginning and 268.4MB in the end (delta: 80.7MB). Free memory was 128.7MB in the beginning and 183.3MB in the end (delta: -54.6MB). Peak memory consumption was 25.3MB. 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 8 terminating modules (3 trivial, 4 deterministic, 1 nondeterministic) and one nonterminating remainder module.One deterministic module has affine ranking function 2 * x + 1 and consists of 3 locations. One deterministic module has affine ranking function -1 * x and consists of 3 locations. One deterministic module has affine ranking function 2 * x + 1 and consists of 2 locations. One deterministic module has affine ranking function -1 * x and consists of 3 locations. One nondeterministic module has affine ranking function -1 * x and consists of 3 locations. 3 modules have a trivial ranking function, the largest among these consists of 4 locations. The remainder module has 10 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 2.8s and 6 iterations. TraceHistogramMax:3. Analysis of lassos took 2.0s. Construction of modules took 0.0s. Büchi inclusion checks took 0.4s. Highest rank in rank-based complementation 3. Minimization of det autom 7. Minimization of nondet autom 1. Automata minimization 0.0s AutomataMinimizationTime, 8 MinimizatonAttempts, 13 StatesRemovedByMinimization, 6 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 [4, 0, 1, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/0 HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 58 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 51 mSDsluCounter, 12 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1 mSDsCounter, 12 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 107 IncrementalHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 12 mSolverCounterUnsat, 11 mSDtfsCounter, 107 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown LassoAnalysisResults: nont1 unkn0 SFLI0 SFLT2 conc0 concLT1 SILN0 SILU0 SILI0 SILT2 lasso0 LassoPreprocessingBenchmarks: Lassos: inital10 mio100 ax100 hnf100 lsp100 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq156 hnf94 smp100 dnf100 smp100 tf112 neg100 sie111 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: sat Degree: 0 Time: 290ms VariablesStem: 0 VariablesLoop: 2 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 0 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 5 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 0.3s InitialAbstractionConstructionTime: 0.1s - TerminationAnalysisResult: Nontermination possible Buchi Automizer proved that your program is nonterminating for some inputs - LassoShapedNonTerminationArgument [Line: 32]: Nontermination argument in form of an infinite program execution. Nontermination argument in form of an infinite program execution. Stem: [L13] 0 x := -2; VAL [x=-2] [L15] FORK 0 fork 1 dec(); VAL [x=-2] [L16] FORK 0 fork 2, 2 inc(); VAL [x=-2] [L32] COND TRUE 2 x < 0 [L33] 2 x := x + 1; VAL [x=-1] [L32] COND TRUE 2 x < 0 [L33] 2 x := x + 1; VAL [x=0] [L24] COND TRUE 1 x > -1 [L25] 1 x := x - 1; VAL [x=-1] [L32] COND TRUE 2 x < 0 [L33] 2 x := x + 1; VAL [x=0] [L24] COND TRUE 1 x > -1 [L25] 1 x := x - 1; VAL [x=-1] Loop: [L32] COND TRUE x < 0 [L33] x := x + 1; [L24] COND TRUE x > -1 [L25] x := x - 1; End of lasso representation. - StatisticsResult: NonterminationArgumentStatistics Fixpoint - NonterminatingLassoResult [Line: 32]: Nonterminating execution Found a nonterminating execution for the following lasso shaped sequence of statements. Stem: [L13] 0 x := -2; VAL [x=-2] [L15] FORK 0 fork 1 dec(); VAL [x=-2] [L16] FORK 0 fork 2, 2 inc(); VAL [x=-2] [L32] COND TRUE 2 x < 0 [L33] 2 x := x + 1; VAL [x=-1] [L32] COND TRUE 2 x < 0 [L33] 2 x := x + 1; VAL [x=0] [L24] COND TRUE 1 x > -1 [L25] 1 x := x - 1; VAL [x=-1] [L32] COND TRUE 2 x < 0 [L33] 2 x := x + 1; VAL [x=0] [L24] COND TRUE 1 x > -1 [L25] 1 x := x - 1; VAL [x=-1] Loop: [L32] COND TRUE x < 0 [L33] x := x + 1; [L24] COND TRUE x > -1 [L25] 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: 41, independent: 37, independent conditional: 0, independent unconditional: 37, dependent: 4, dependent conditional: 0, dependent unconditional: 4, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 34, independent: 30, independent conditional: 0, independent unconditional: 30, dependent: 4, dependent conditional: 0, dependent unconditional: 4, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 34, independent: 28, independent conditional: 0, independent unconditional: 28, dependent: 6, dependent conditional: 0, dependent unconditional: 6, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 6, independent: 2, independent conditional: 0, independent unconditional: 2, dependent: 4, dependent conditional: 0, dependent unconditional: 4, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 27, independent: 5, independent conditional: 0, independent unconditional: 5, dependent: 22, dependent conditional: 0, dependent unconditional: 22, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 41, independent: 7, independent conditional: 0, independent unconditional: 7, dependent: 0, dependent conditional: 0, dependent 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, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 RESULT: Ultimate proved your program to be incorrect! [2023-10-12 17:12:15,227 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (22)] Forceful destruction successful, exit code 0 [2023-10-12 17:12:15,454 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (18)] Forceful destruction successful, exit code 0 [2023-10-12 17:12:15,628 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-10-12 17:12:15,828 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Ended with exit code 0 Received shutdown request...