/root/.sdkman/candidates/java/current/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/automizer/svcomp-Termination-32bit-Automizer_Default.epf --buchiautomizer.automaton.type.for.concurrent.programs BUCHI_AUTOMATON -tc ../../../trunk/examples/toolchains/BuchiAutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/POPL2023/incr-decr-zero.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.3-?-9ecb849-m [2024-02-09 23:24:07,028 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-02-09 23:24:07,101 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Termination-32bit-Automizer_Default.epf [2024-02-09 23:24:07,106 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-02-09 23:24:07,107 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-02-09 23:24:07,107 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.Only consider context switches at boundaries of atomic blocks [2024-02-09 23:24:07,136 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-02-09 23:24:07,137 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-02-09 23:24:07,137 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-02-09 23:24:07,141 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-02-09 23:24:07,141 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-02-09 23:24:07,141 INFO L153 SettingsManager]: * Use SBE=true [2024-02-09 23:24:07,141 INFO L151 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2024-02-09 23:24:07,142 INFO L153 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2024-02-09 23:24:07,143 INFO L153 SettingsManager]: * Use old map elimination=false [2024-02-09 23:24:07,143 INFO L153 SettingsManager]: * Use external solver (rank synthesis)=false [2024-02-09 23:24:07,143 INFO L153 SettingsManager]: * Use only trivial implications for array writes=true [2024-02-09 23:24:07,143 INFO L153 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2024-02-09 23:24:07,143 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-02-09 23:24:07,144 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2024-02-09 23:24:07,144 INFO L153 SettingsManager]: * sizeof long=4 [2024-02-09 23:24:07,144 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-02-09 23:24:07,144 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-02-09 23:24:07,144 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-02-09 23:24:07,145 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2024-02-09 23:24:07,145 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2024-02-09 23:24:07,145 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2024-02-09 23:24:07,145 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-02-09 23:24:07,145 INFO L153 SettingsManager]: * sizeof long double=12 [2024-02-09 23:24:07,145 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-02-09 23:24:07,146 INFO L153 SettingsManager]: * Assume nondeterminstic values are in range=false [2024-02-09 23:24:07,146 INFO L153 SettingsManager]: * Use constant arrays=true [2024-02-09 23:24:07,146 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-02-09 23:24:07,147 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-02-09 23:24:07,147 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-02-09 23:24:07,147 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-02-09 23:24:07,147 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-02-09 23:24:07,148 INFO L151 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2024-02-09 23:24:07,148 INFO L153 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer: Automaton type for concurrent programs -> BUCHI_AUTOMATON [2024-02-09 23:24:07,413 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-02-09 23:24:07,437 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-02-09 23:24:07,441 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-02-09 23:24:07,442 INFO L270 PluginConnector]: Initializing Boogie PL CUP Parser... [2024-02-09 23:24:07,443 INFO L274 PluginConnector]: Boogie PL CUP Parser initialized [2024-02-09 23:24:07,444 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/POPL2023/incr-decr-zero.bpl [2024-02-09 23:24:07,444 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/POPL2023/incr-decr-zero.bpl' [2024-02-09 23:24:07,469 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-02-09 23:24:07,472 INFO L133 ToolchainWalker]: Walking toolchain with 4 elements. [2024-02-09 23:24:07,473 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-02-09 23:24:07,473 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-02-09 23:24:07,473 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-02-09 23:24:07,485 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "incr-decr-zero.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.02 11:24:07" (1/1) ... [2024-02-09 23:24:07,491 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "incr-decr-zero.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.02 11:24:07" (1/1) ... [2024-02-09 23:24:07,505 INFO L138 Inliner]: procedures = 3, calls = 2, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-02-09 23:24:07,506 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-02-09 23:24:07,508 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-02-09 23:24:07,509 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-02-09 23:24:07,509 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-02-09 23:24:07,548 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "incr-decr-zero.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.02 11:24:07" (1/1) ... [2024-02-09 23:24:07,548 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "incr-decr-zero.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.02 11:24:07" (1/1) ... [2024-02-09 23:24:07,548 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "incr-decr-zero.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.02 11:24:07" (1/1) ... [2024-02-09 23:24:07,548 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "incr-decr-zero.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.02 11:24:07" (1/1) ... [2024-02-09 23:24:07,550 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "incr-decr-zero.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.02 11:24:07" (1/1) ... [2024-02-09 23:24:07,552 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "incr-decr-zero.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.02 11:24:07" (1/1) ... [2024-02-09 23:24:07,552 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "incr-decr-zero.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.02 11:24:07" (1/1) ... [2024-02-09 23:24:07,553 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "incr-decr-zero.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.02 11:24:07" (1/1) ... [2024-02-09 23:24:07,553 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-02-09 23:24:07,554 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-02-09 23:24:07,554 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-02-09 23:24:07,554 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-02-09 23:24:07,575 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "incr-decr-zero.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.02 11:24:07" (1/1) ... [2024-02-09 23:24:07,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-02-09 23:24:07,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-09 23:24:07,611 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) [2024-02-09 23:24:07,626 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 [2024-02-09 23:24:07,656 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2024-02-09 23:24:07,656 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-02-09 23:24:07,656 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-02-09 23:24:07,656 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2024-02-09 23:24:07,656 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-02-09 23:24:07,657 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-02-09 23:24:07,657 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2024-02-09 23:24:07,657 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-02-09 23:24:07,657 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-02-09 23:24:07,658 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-02-09 23:24:07,701 INFO L236 CfgBuilder]: Building ICFG [2024-02-09 23:24:07,703 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2024-02-09 23:24:07,776 INFO L277 CfgBuilder]: Performing block encoding [2024-02-09 23:24:07,781 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-02-09 23:24:07,781 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2024-02-09 23:24:07,783 INFO L201 PluginConnector]: Adding new model incr-decr-zero.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.02 11:24:07 BoogieIcfgContainer [2024-02-09 23:24:07,783 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-02-09 23:24:07,786 INFO L112 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2024-02-09 23:24:07,786 INFO L270 PluginConnector]: Initializing BuchiAutomizer... [2024-02-09 23:24:07,789 INFO L274 PluginConnector]: BuchiAutomizer initialized [2024-02-09 23:24:07,794 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2024-02-09 23:24:07,794 INFO L184 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "incr-decr-zero.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.02 11:24:07" (1/2) ... [2024-02-09 23:24:07,795 INFO L204 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@5fc78c9 and model type incr-decr-zero.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 09.02 11:24:07, skipping insertion in model container [2024-02-09 23:24:07,795 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2024-02-09 23:24:07,796 INFO L184 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "incr-decr-zero.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.02 11:24:07" (2/2) ... [2024-02-09 23:24:07,798 INFO L332 chiAutomizerObserver]: Analyzing ICFG incr-decr-zero.bpl [2024-02-09 23:24:07,880 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-02-09 23:24:07,922 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 27 places, 24 transitions, 62 flow [2024-02-09 23:24:07,937 INFO L124 PetriNetUnfolderBase]: 2/20 cut-off events. [2024-02-09 23:24:07,938 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-02-09 23:24:07,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29 conditions, 20 events. 2/20 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 28 event pairs, 0 based on Foata normal form. 0/17 useless extension candidates. Maximal degree in co-relation 15. Up to 2 conditions per place. [2024-02-09 23:24:07,947 INFO L82 GeneralOperation]: Start removeDead. Operand has 27 places, 24 transitions, 62 flow [2024-02-09 23:24:07,950 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 25 places, 20 transitions, 52 flow [2024-02-09 23:24:07,960 INFO L303 stractBuchiCegarLoop]: Interprodecural is true [2024-02-09 23:24:07,960 INFO L304 stractBuchiCegarLoop]: Hoare is false [2024-02-09 23:24:07,960 INFO L305 stractBuchiCegarLoop]: Compute interpolants for ForwardPredicates [2024-02-09 23:24:07,960 INFO L306 stractBuchiCegarLoop]: Backedges is STRAIGHT_LINE [2024-02-09 23:24:07,960 INFO L307 stractBuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2024-02-09 23:24:07,972 INFO L308 stractBuchiCegarLoop]: Difference is false [2024-02-09 23:24:07,972 INFO L309 stractBuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2024-02-09 23:24:07,973 INFO L313 stractBuchiCegarLoop]: ======== Iteration 0 == of CEGAR loop == BuchiAutomatonCegarLoop ======== [2024-02-09 23:24:07,974 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand currently 0 states, but on-demand construction may add more states [2024-02-09 23:24:08,004 INFO L131 ngComponentsAnalysis]: Automaton has 9 accepting balls. 33 [2024-02-09 23:24:08,004 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2024-02-09 23:24:08,004 INFO L119 BuchiIsEmpty]: Starting construction of run [2024-02-09 23:24:08,007 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1] [2024-02-09 23:24:08,007 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1] [2024-02-09 23:24:08,008 INFO L335 stractBuchiCegarLoop]: ======== Iteration 1 ============ [2024-02-09 23:24:08,008 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand currently 53 states, but on-demand construction may add more states [2024-02-09 23:24:08,010 INFO L131 ngComponentsAnalysis]: Automaton has 9 accepting balls. 33 [2024-02-09 23:24:08,011 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2024-02-09 23:24:08,011 INFO L119 BuchiIsEmpty]: Starting construction of run [2024-02-09 23:24:08,011 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1] [2024-02-09 23:24:08,011 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1] [2024-02-09 23:24:08,015 INFO L748 eck$LassoCheckResult]: Stem: 30#[$Ultimate##0]don't care [41] $Ultimate##0-->L16: Formula: (= v_x_5 0) InVars {} OutVars{x=v_x_5} AuxVars[] AssignedVars[x] 33#[L16]don't care [62] L16-->$Ultimate##0: Formula: (= v_thread1Thread1of1ForFork0_thidvar0_2 1) InVars {} OutVars{thread1Thread1of1ForFork0_thidvar0=v_thread1Thread1of1ForFork0_thidvar0_2, thread1Thread1of1ForFork0_i=v_thread1Thread1of1ForFork0_i_12} AuxVars[] AssignedVars[thread1Thread1of1ForFork0_thidvar0, thread1Thread1of1ForFork0_i] 35#[L16-1, $Ultimate##0]don't care [48] $Ultimate##0-->L30-1: Formula: (= v_thread1Thread1of1ForFork0_i_1 0) InVars {} OutVars{thread1Thread1of1ForFork0_i=v_thread1Thread1of1ForFork0_i_1} AuxVars[] AssignedVars[thread1Thread1of1ForFork0_i] 37#[L16-1, L30-1]don't care [2024-02-09 23:24:08,015 INFO L750 eck$LassoCheckResult]: Loop: 37#[L16-1, L30-1]don't care [50] L30-1-->L31: Formula: (< v_thread1Thread1of1ForFork0_i_5 v_N_1) InVars {thread1Thread1of1ForFork0_i=v_thread1Thread1of1ForFork0_i_5, N=v_N_1} OutVars{thread1Thread1of1ForFork0_i=v_thread1Thread1of1ForFork0_i_5, N=v_N_1} AuxVars[] AssignedVars[] 45#[L31, L16-1]don't care [52] L31-->L32: Formula: (= v_x_1 (+ v_x_2 1)) InVars {x=v_x_2} OutVars{x=v_x_1} AuxVars[] AssignedVars[x] 57#[L16-1, L32]don't care [53] L32-->L30-1: Formula: (= (+ v_thread1Thread1of1ForFork0_i_7 1) v_thread1Thread1of1ForFork0_i_8) InVars {thread1Thread1of1ForFork0_i=v_thread1Thread1of1ForFork0_i_7} OutVars{thread1Thread1of1ForFork0_i=v_thread1Thread1of1ForFork0_i_8} AuxVars[] AssignedVars[thread1Thread1of1ForFork0_i] 37#[L16-1, L30-1]don't care [2024-02-09 23:24:08,019 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2024-02-09 23:24:08,019 INFO L85 PathProgramCache]: Analyzing trace with hash 71162, now seen corresponding path program 1 times [2024-02-09 23:24:08,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-09 23:24:08,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536177279] [2024-02-09 23:24:08,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-09 23:24:08,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-09 23:24:08,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-02-09 23:24:08,081 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-02-09 23:24:08,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-02-09 23:24:08,095 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-02-09 23:24:08,097 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2024-02-09 23:24:08,098 INFO L85 PathProgramCache]: Analyzing trace with hash 79506, now seen corresponding path program 1 times [2024-02-09 23:24:08,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-09 23:24:08,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630746764] [2024-02-09 23:24:08,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-09 23:24:08,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-09 23:24:08,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-02-09 23:24:08,107 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-02-09 23:24:08,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-02-09 23:24:08,119 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-02-09 23:24:08,121 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2024-02-09 23:24:08,121 INFO L85 PathProgramCache]: Analyzing trace with hash 2120036857, now seen corresponding path program 1 times [2024-02-09 23:24:08,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-09 23:24:08,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786853332] [2024-02-09 23:24:08,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-09 23:24:08,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-09 23:24:08,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-02-09 23:24:08,127 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-02-09 23:24:08,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-02-09 23:24:08,131 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-02-09 23:24:08,188 INFO L210 LassoAnalysis]: Preferences: [2024-02-09 23:24:08,189 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2024-02-09 23:24:08,189 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2024-02-09 23:24:08,189 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2024-02-09 23:24:08,189 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2024-02-09 23:24:08,189 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-02-09 23:24:08,189 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2024-02-09 23:24:08,189 INFO L132 ssoRankerPreferences]: Path of dumped script: [2024-02-09 23:24:08,189 INFO L133 ssoRankerPreferences]: Filename of dumped script: incr-decr-zero.bpl_BEv2_Iteration1_Loop [2024-02-09 23:24:08,189 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2024-02-09 23:24:08,189 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2024-02-09 23:24:08,202 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-02-09 23:24:08,210 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-02-09 23:24:08,243 INFO L294 LassoAnalysis]: Preprocessing complete. [2024-02-09 23:24:08,244 INFO L404 LassoAnalysis]: Checking for nontermination... [2024-02-09 23:24:08,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-02-09 23:24:08,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-09 23:24:08,248 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) [2024-02-09 23:24:08,252 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2024-02-09 23:24:08,252 INFO L160 nArgumentSynthesizer]: Using integer mode. [2024-02-09 23:24:08,255 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 [2024-02-09 23:24:08,269 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Ended with exit code 0 [2024-02-09 23:24:08,269 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-02-09 23:24:08,269 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-09 23:24:08,270 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) [2024-02-09 23:24:08,273 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 [2024-02-09 23:24:08,273 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2024-02-09 23:24:08,274 INFO L160 nArgumentSynthesizer]: Using integer mode. [2024-02-09 23:24:08,303 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2024-02-09 23:24:08,303 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {x=0} Honda state: {x=0} Generalized eigenvectors: [{x=2}, {x=5}, {x=-6}] Lambdas: [1, 1, 1] Nus: [0, 0] [2024-02-09 23:24:08,307 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Ended with exit code 0 [2024-02-09 23:24:08,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-02-09 23:24:08,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-09 23:24:08,308 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) [2024-02-09 23:24:08,309 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 [2024-02-09 23:24:08,311 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2024-02-09 23:24:08,311 INFO L160 nArgumentSynthesizer]: Using integer mode. [2024-02-09 23:24:08,330 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 [2024-02-09 23:24:08,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-02-09 23:24:08,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-09 23:24:08,332 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) [2024-02-09 23:24:08,332 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 [2024-02-09 23:24:08,334 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2024-02-09 23:24:08,334 INFO L160 nArgumentSynthesizer]: Using integer mode. [2024-02-09 23:24:08,477 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2024-02-09 23:24:08,484 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 [2024-02-09 23:24:08,485 INFO L210 LassoAnalysis]: Preferences: [2024-02-09 23:24:08,485 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2024-02-09 23:24:08,485 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2024-02-09 23:24:08,485 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2024-02-09 23:24:08,485 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2024-02-09 23:24:08,485 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-02-09 23:24:08,485 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2024-02-09 23:24:08,485 INFO L132 ssoRankerPreferences]: Path of dumped script: [2024-02-09 23:24:08,485 INFO L133 ssoRankerPreferences]: Filename of dumped script: incr-decr-zero.bpl_BEv2_Iteration1_Loop [2024-02-09 23:24:08,485 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2024-02-09 23:24:08,485 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2024-02-09 23:24:08,486 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-02-09 23:24:08,504 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-02-09 23:24:08,541 INFO L294 LassoAnalysis]: Preprocessing complete. [2024-02-09 23:24:08,544 INFO L490 LassoAnalysis]: Using template 'affine'. [2024-02-09 23:24:08,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-02-09 23:24:08,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-09 23:24:08,546 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) [2024-02-09 23:24:08,549 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 [2024-02-09 23:24:08,550 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 [2024-02-09 23:24:08,556 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2024-02-09 23:24:08,557 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2024-02-09 23:24:08,558 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2024-02-09 23:24:08,558 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2024-02-09 23:24:08,558 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2024-02-09 23:24:08,560 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2024-02-09 23:24:08,560 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2024-02-09 23:24:08,562 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2024-02-09 23:24:08,565 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 [2024-02-09 23:24:08,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-02-09 23:24:08,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-09 23:24:08,567 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) [2024-02-09 23:24:08,568 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 [2024-02-09 23:24:08,569 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 [2024-02-09 23:24:08,576 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2024-02-09 23:24:08,576 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2024-02-09 23:24:08,577 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2024-02-09 23:24:08,577 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2024-02-09 23:24:08,577 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2024-02-09 23:24:08,578 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2024-02-09 23:24:08,578 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2024-02-09 23:24:08,587 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2024-02-09 23:24:08,599 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2024-02-09 23:24:08,599 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 0 variables to zero. [2024-02-09 23:24:08,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-02-09 23:24:08,601 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-09 23:24:08,602 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) [2024-02-09 23:24:08,605 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 [2024-02-09 23:24:08,605 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2024-02-09 23:24:08,607 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2024-02-09 23:24:08,607 INFO L513 LassoAnalysis]: Proved termination. [2024-02-09 23:24:08,607 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(thread1Thread1of1ForFork0_i, N) = -1*thread1Thread1of1ForFork0_i + 1*N Supporting invariants [] [2024-02-09 23:24:08,616 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 [2024-02-09 23:24:08,619 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2024-02-09 23:24:08,643 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2024-02-09 23:24:08,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-09 23:24:08,656 INFO L262 TraceCheckSpWp]: Trace formula consists of 8 conjuncts, 2 conjunts are in the unsatisfiable core [2024-02-09 23:24:08,657 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-09 23:24:08,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-09 23:24:08,672 WARN L260 TraceCheckSpWp]: Trace formula consists of 7 conjuncts, 4 conjunts are in the unsatisfiable core [2024-02-09 23:24:08,673 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-09 23:24:08,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-09 23:24:08,744 INFO L141 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 2 loop predicates [2024-02-09 23:24:08,746 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand currently 53 states, but on-demand construction may add more states Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-09 23:24:08,823 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand currently 53 states, but on-demand construction may add more states. Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 128 states and 298 transitions. Complement of second has 6 states. [2024-02-09 23:24:08,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2024-02-09 23:24:08,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-09 23:24:08,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 43 transitions. [2024-02-09 23:24:08,831 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 43 transitions. Stem has 3 letters. Loop has 3 letters. [2024-02-09 23:24:08,832 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2024-02-09 23:24:08,832 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 43 transitions. Stem has 6 letters. Loop has 3 letters. [2024-02-09 23:24:08,832 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2024-02-09 23:24:08,832 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 43 transitions. Stem has 3 letters. Loop has 6 letters. [2024-02-09 23:24:08,832 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2024-02-09 23:24:08,833 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 128 states and 298 transitions. [2024-02-09 23:24:08,838 INFO L131 ngComponentsAnalysis]: Automaton has 7 accepting balls. 21 [2024-02-09 23:24:08,842 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 128 states to 70 states and 165 transitions. [2024-02-09 23:24:08,842 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 37 [2024-02-09 23:24:08,843 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 51 [2024-02-09 23:24:08,843 INFO L73 IsDeterministic]: Start isDeterministic. Operand 70 states and 165 transitions. [2024-02-09 23:24:08,843 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2024-02-09 23:24:08,843 INFO L218 hiAutomatonCegarLoop]: Abstraction has 70 states and 165 transitions. [2024-02-09 23:24:08,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states and 165 transitions. [2024-02-09 23:24:08,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 59. [2024-02-09 23:24:08,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 59 states have (on average 2.3728813559322033) internal successors, (140), 58 states have internal predecessors, (140), 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) [2024-02-09 23:24:08,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 140 transitions. [2024-02-09 23:24:08,866 INFO L240 hiAutomatonCegarLoop]: Abstraction has 59 states and 140 transitions. [2024-02-09 23:24:08,866 INFO L428 stractBuchiCegarLoop]: Abstraction has 59 states and 140 transitions. [2024-02-09 23:24:08,866 INFO L335 stractBuchiCegarLoop]: ======== Iteration 2 ============ [2024-02-09 23:24:08,866 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 59 states and 140 transitions. [2024-02-09 23:24:08,868 INFO L131 ngComponentsAnalysis]: Automaton has 7 accepting balls. 21 [2024-02-09 23:24:08,868 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2024-02-09 23:24:08,868 INFO L119 BuchiIsEmpty]: Starting construction of run [2024-02-09 23:24:08,868 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1, 1] [2024-02-09 23:24:08,868 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1] [2024-02-09 23:24:08,869 INFO L748 eck$LassoCheckResult]: Stem: 419#[$Ultimate##0]don't care [41] $Ultimate##0-->L16: Formula: (= v_x_5 0) InVars {} OutVars{x=v_x_5} AuxVars[] AssignedVars[x] 307#[L16]don't care [62] L16-->$Ultimate##0: Formula: (= v_thread1Thread1of1ForFork0_thidvar0_2 1) InVars {} OutVars{thread1Thread1of1ForFork0_thidvar0=v_thread1Thread1of1ForFork0_thidvar0_2, thread1Thread1of1ForFork0_i=v_thread1Thread1of1ForFork0_i_12} AuxVars[] AssignedVars[thread1Thread1of1ForFork0_thidvar0, thread1Thread1of1ForFork0_i] 309#[L16-1, $Ultimate##0]don't care [65] L16-1-->$Ultimate##0: Formula: (and (= 2 v_thread2Thread1of1ForFork1_thidvar1_2) (= 2 v_thread2Thread1of1ForFork1_thidvar0_2)) InVars {} OutVars{thread2Thread1of1ForFork1_j=v_thread2Thread1of1ForFork1_j_12, thread2Thread1of1ForFork1_thidvar0=v_thread2Thread1of1ForFork1_thidvar0_2, thread2Thread1of1ForFork1_thidvar1=v_thread2Thread1of1ForFork1_thidvar1_2} AuxVars[] AssignedVars[thread2Thread1of1ForFork1_j, thread2Thread1of1ForFork1_thidvar0, thread2Thread1of1ForFork1_thidvar1] 389#[L17, $Ultimate##0, $Ultimate##0]don't care [54] $Ultimate##0-->L42-1: Formula: (= v_thread2Thread1of1ForFork1_j_1 0) InVars {} OutVars{thread2Thread1of1ForFork1_j=v_thread2Thread1of1ForFork1_j_1} AuxVars[] AssignedVars[thread2Thread1of1ForFork1_j] 391#[L42-1, $Ultimate##0, L17]don't care [2024-02-09 23:24:08,869 INFO L750 eck$LassoCheckResult]: Loop: 391#[L42-1, $Ultimate##0, L17]don't care [56] L42-1-->L43: Formula: (< v_thread2Thread1of1ForFork1_j_5 v_N_4) InVars {thread2Thread1of1ForFork1_j=v_thread2Thread1of1ForFork1_j_5, N=v_N_4} OutVars{thread2Thread1of1ForFork1_j=v_thread2Thread1of1ForFork1_j_5, N=v_N_4} AuxVars[] AssignedVars[] 395#[L43, $Ultimate##0, L17]don't care [58] L43-->L44: Formula: (= v_x_4 (+ v_x_3 1)) InVars {x=v_x_4} OutVars{x=v_x_3} AuxVars[] AssignedVars[x] 411#[L44, $Ultimate##0, L17]don't care [59] L44-->L42-1: Formula: (= (+ v_thread2Thread1of1ForFork1_j_7 1) v_thread2Thread1of1ForFork1_j_8) InVars {thread2Thread1of1ForFork1_j=v_thread2Thread1of1ForFork1_j_7} OutVars{thread2Thread1of1ForFork1_j=v_thread2Thread1of1ForFork1_j_8} AuxVars[] AssignedVars[thread2Thread1of1ForFork1_j] 391#[L42-1, $Ultimate##0, L17]don't care [2024-02-09 23:24:08,869 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2024-02-09 23:24:08,869 INFO L85 PathProgramCache]: Analyzing trace with hash 2206603, now seen corresponding path program 1 times [2024-02-09 23:24:08,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-09 23:24:08,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678982594] [2024-02-09 23:24:08,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-09 23:24:08,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-09 23:24:08,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-02-09 23:24:08,873 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-02-09 23:24:08,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-02-09 23:24:08,876 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-02-09 23:24:08,876 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2024-02-09 23:24:08,876 INFO L85 PathProgramCache]: Analyzing trace with hash 85464, now seen corresponding path program 1 times [2024-02-09 23:24:08,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-09 23:24:08,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543838983] [2024-02-09 23:24:08,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-09 23:24:08,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-09 23:24:08,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-02-09 23:24:08,880 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-02-09 23:24:08,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-02-09 23:24:08,882 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-02-09 23:24:08,882 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2024-02-09 23:24:08,882 INFO L85 PathProgramCache]: Analyzing trace with hash 1312456206, now seen corresponding path program 1 times [2024-02-09 23:24:08,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-09 23:24:08,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201338691] [2024-02-09 23:24:08,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-09 23:24:08,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-09 23:24:08,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-02-09 23:24:08,887 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-02-09 23:24:08,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-02-09 23:24:08,890 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-02-09 23:24:08,906 INFO L210 LassoAnalysis]: Preferences: [2024-02-09 23:24:08,906 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2024-02-09 23:24:08,906 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2024-02-09 23:24:08,906 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2024-02-09 23:24:08,906 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2024-02-09 23:24:08,906 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-02-09 23:24:08,906 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2024-02-09 23:24:08,906 INFO L132 ssoRankerPreferences]: Path of dumped script: [2024-02-09 23:24:08,906 INFO L133 ssoRankerPreferences]: Filename of dumped script: incr-decr-zero.bpl_BEv2_Iteration2_Loop [2024-02-09 23:24:08,906 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2024-02-09 23:24:08,906 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2024-02-09 23:24:08,907 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-02-09 23:24:08,909 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-02-09 23:24:08,943 INFO L294 LassoAnalysis]: Preprocessing complete. [2024-02-09 23:24:08,943 INFO L404 LassoAnalysis]: Checking for nontermination... [2024-02-09 23:24:08,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-02-09 23:24:08,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-09 23:24:08,944 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) [2024-02-09 23:24:08,961 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 [2024-02-09 23:24:08,962 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2024-02-09 23:24:08,963 INFO L160 nArgumentSynthesizer]: Using integer mode. [2024-02-09 23:24:08,962 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Ended with exit code 0 [2024-02-09 23:24:08,988 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 [2024-02-09 23:24:08,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-02-09 23:24:08,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-09 23:24:08,989 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2024-02-09 23:24:08,994 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Waiting until timeout for monitored process [2024-02-09 23:24:08,996 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2024-02-09 23:24:08,996 INFO L160 nArgumentSynthesizer]: Using integer mode. [2024-02-09 23:24:09,024 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2024-02-09 23:24:09,024 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {x=0} Honda state: {x=0} Generalized eigenvectors: [{x=1}, {x=3}, {x=-5}] Lambdas: [1, 1, 1] Nus: [0, 0] [2024-02-09 23:24:09,030 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Forceful destruction successful, exit code 0 [2024-02-09 23:24:09,031 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-02-09 23:24:09,031 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-09 23:24:09,032 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) [2024-02-09 23:24:09,034 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 [2024-02-09 23:24:09,035 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2024-02-09 23:24:09,035 INFO L160 nArgumentSynthesizer]: Using integer mode. [2024-02-09 23:24:09,047 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 [2024-02-09 23:24:09,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-02-09 23:24:09,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-09 23:24:09,049 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) [2024-02-09 23:24:09,050 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 [2024-02-09 23:24:09,051 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2024-02-09 23:24:09,051 INFO L160 nArgumentSynthesizer]: Using integer mode. [2024-02-09 23:24:09,181 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2024-02-09 23:24:09,184 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 [2024-02-09 23:24:09,185 INFO L210 LassoAnalysis]: Preferences: [2024-02-09 23:24:09,186 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2024-02-09 23:24:09,186 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2024-02-09 23:24:09,186 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2024-02-09 23:24:09,186 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2024-02-09 23:24:09,186 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-02-09 23:24:09,186 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2024-02-09 23:24:09,186 INFO L132 ssoRankerPreferences]: Path of dumped script: [2024-02-09 23:24:09,186 INFO L133 ssoRankerPreferences]: Filename of dumped script: incr-decr-zero.bpl_BEv2_Iteration2_Loop [2024-02-09 23:24:09,186 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2024-02-09 23:24:09,186 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2024-02-09 23:24:09,187 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-02-09 23:24:09,191 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-02-09 23:24:09,214 INFO L294 LassoAnalysis]: Preprocessing complete. [2024-02-09 23:24:09,215 INFO L490 LassoAnalysis]: Using template 'affine'. [2024-02-09 23:24:09,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-02-09 23:24:09,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-09 23:24:09,216 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) [2024-02-09 23:24:09,219 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 [2024-02-09 23:24:09,219 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 [2024-02-09 23:24:09,226 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2024-02-09 23:24:09,226 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2024-02-09 23:24:09,226 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2024-02-09 23:24:09,226 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2024-02-09 23:24:09,226 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2024-02-09 23:24:09,227 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2024-02-09 23:24:09,227 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2024-02-09 23:24:09,229 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2024-02-09 23:24:09,245 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 [2024-02-09 23:24:09,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-02-09 23:24:09,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-09 23:24:09,247 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) [2024-02-09 23:24:09,266 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 [2024-02-09 23:24:09,275 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2024-02-09 23:24:09,275 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2024-02-09 23:24:09,275 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2024-02-09 23:24:09,275 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2024-02-09 23:24:09,275 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2024-02-09 23:24:09,276 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2024-02-09 23:24:09,276 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2024-02-09 23:24:09,278 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 [2024-02-09 23:24:09,287 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2024-02-09 23:24:09,297 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2024-02-09 23:24:09,297 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 0 variables to zero. [2024-02-09 23:24:09,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-02-09 23:24:09,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-09 23:24:09,298 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) [2024-02-09 23:24:09,300 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 [2024-02-09 23:24:09,301 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2024-02-09 23:24:09,301 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2024-02-09 23:24:09,301 INFO L513 LassoAnalysis]: Proved termination. [2024-02-09 23:24:09,301 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(thread2Thread1of1ForFork1_j, N) = -1*thread2Thread1of1ForFork1_j + 1*N Supporting invariants [] [2024-02-09 23:24:09,305 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 [2024-02-09 23:24:09,306 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2024-02-09 23:24:09,328 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2024-02-09 23:24:09,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-09 23:24:09,336 INFO L262 TraceCheckSpWp]: Trace formula consists of 12 conjuncts, 2 conjunts are in the unsatisfiable core [2024-02-09 23:24:09,337 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-09 23:24:09,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-09 23:24:09,347 WARN L260 TraceCheckSpWp]: Trace formula consists of 7 conjuncts, 4 conjunts are in the unsatisfiable core [2024-02-09 23:24:09,349 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-09 23:24:09,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-09 23:24:09,381 INFO L141 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 2 loop predicates [2024-02-09 23:24:09,381 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 59 states and 140 transitions. cyclomatic complexity: 91 Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 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) [2024-02-09 23:24:09,436 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 59 states and 140 transitions. cyclomatic complexity: 91. Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 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 145 states and 358 transitions. Complement of second has 6 states. [2024-02-09 23:24:09,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2024-02-09 23:24:09,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 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) [2024-02-09 23:24:09,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 35 transitions. [2024-02-09 23:24:09,438 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 35 transitions. Stem has 4 letters. Loop has 3 letters. [2024-02-09 23:24:09,438 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2024-02-09 23:24:09,438 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 35 transitions. Stem has 7 letters. Loop has 3 letters. [2024-02-09 23:24:09,438 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2024-02-09 23:24:09,438 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 35 transitions. Stem has 4 letters. Loop has 6 letters. [2024-02-09 23:24:09,438 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2024-02-09 23:24:09,438 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 145 states and 358 transitions. [2024-02-09 23:24:09,441 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2024-02-09 23:24:09,441 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 145 states to 0 states and 0 transitions. [2024-02-09 23:24:09,441 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2024-02-09 23:24:09,442 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2024-02-09 23:24:09,442 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2024-02-09 23:24:09,442 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2024-02-09 23:24:09,442 INFO L218 hiAutomatonCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-02-09 23:24:09,442 INFO L240 hiAutomatonCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-02-09 23:24:09,442 INFO L428 stractBuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-02-09 23:24:09,442 INFO L335 stractBuchiCegarLoop]: ======== Iteration 3 ============ [2024-02-09 23:24:09,442 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2024-02-09 23:24:09,442 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2024-02-09 23:24:09,442 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2024-02-09 23:24:09,452 INFO L201 PluginConnector]: Adding new model incr-decr-zero.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 09.02 11:24:09 BoogieIcfgContainer [2024-02-09 23:24:09,452 INFO L131 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2024-02-09 23:24:09,453 INFO L158 Benchmark]: Toolchain (without parser) took 1981.22ms. Allocated memory was 185.6MB in the beginning and 252.7MB in the end (delta: 67.1MB). Free memory was 128.7MB in the beginning and 201.9MB in the end (delta: -73.2MB). There was no memory consumed. Max. memory is 8.0GB. [2024-02-09 23:24:09,453 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.10ms. Allocated memory is still 185.6MB. Free memory is still 129.9MB. There was no memory consumed. Max. memory is 8.0GB. [2024-02-09 23:24:09,453 INFO L158 Benchmark]: Boogie Procedure Inliner took 33.60ms. Allocated memory is still 185.6MB. Free memory was 128.7MB in the beginning and 162.1MB in the end (delta: -33.3MB). Peak memory consumption was 10.7MB. Max. memory is 8.0GB. [2024-02-09 23:24:09,454 INFO L158 Benchmark]: Boogie Preprocessor took 45.17ms. Allocated memory is still 185.6MB. Free memory was 162.1MB in the beginning and 162.4MB in the end (delta: -333.7kB). Peak memory consumption was 5.3MB. Max. memory is 8.0GB. [2024-02-09 23:24:09,455 INFO L158 Benchmark]: RCFGBuilder took 228.78ms. Allocated memory is still 185.6MB. Free memory was 162.4MB in the beginning and 153.3MB in the end (delta: 9.0MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2024-02-09 23:24:09,455 INFO L158 Benchmark]: BuchiAutomizer took 1666.25ms. Allocated memory was 185.6MB in the beginning and 252.7MB in the end (delta: 67.1MB). Free memory was 153.2MB in the beginning and 201.9MB in the end (delta: -48.8MB). Peak memory consumption was 18.7MB. Max. memory is 8.0GB. [2024-02-09 23:24:09,458 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 0.10ms. Allocated memory is still 185.6MB. Free memory is still 129.9MB. There was no memory consumed. Max. memory is 8.0GB. * Boogie Procedure Inliner took 33.60ms. Allocated memory is still 185.6MB. Free memory was 128.7MB in the beginning and 162.1MB in the end (delta: -33.3MB). Peak memory consumption was 10.7MB. Max. memory is 8.0GB. * Boogie Preprocessor took 45.17ms. Allocated memory is still 185.6MB. Free memory was 162.1MB in the beginning and 162.4MB in the end (delta: -333.7kB). Peak memory consumption was 5.3MB. Max. memory is 8.0GB. * RCFGBuilder took 228.78ms. Allocated memory is still 185.6MB. Free memory was 162.4MB in the beginning and 153.3MB in the end (delta: 9.0MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * BuchiAutomizer took 1666.25ms. Allocated memory was 185.6MB in the beginning and 252.7MB in the end (delta: 67.1MB). Free memory was 153.2MB in the beginning and 201.9MB in the end (delta: -48.8MB). Peak memory consumption was 18.7MB. 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 2 terminating modules (0 trivial, 2 deterministic, 0 nondeterministic). One deterministic module has affine ranking function -1 * i + N and consists of 4 locations. One deterministic module has affine ranking function N + -1 * j and consists of 4 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 1.5s and 3 iterations. TraceHistogramMax:1. Analysis of lassos took 1.0s. Construction of modules took 0.0s. Büchi inclusion checks took 0.3s. Highest rank in rank-based complementation 3. Minimization of det autom 1. Minimization of nondet autom 1. Automata minimization 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 11 StatesRemovedByMinimization, 1 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 [2, 0, 0, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/0 HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 60 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 58 mSDsluCounter, 72 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 34 mSDsCounter, 4 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 50 IncrementalHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 4 mSolverCounterUnsat, 38 mSDtfsCounter, 50 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown LassoAnalysisResults: nont0 unkn0 SFLI0 SFLT2 conc0 concLT0 SILN0 SILU0 SILI0 SILT0 lasso0 LassoPreprocessingBenchmarks: Lassos: inital17 mio100 ax100 hnf100 lsp70 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq150 hnf94 smp100 dnf100 smp100 tf111 neg100 sie100 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 17ms VariablesStem: 0 VariablesLoop: 2 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 0 LassoNonterminationAnalysisSatUnbounded: 2 LassoNonterminationAnalysisUnsat: 2 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 0.4s InitialAbstractionConstructionTime: 0.0s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! [2024-02-09 23:24:09,472 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Ended with exit code 0 [2024-02-09 23:24:09,674 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...