/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 RABIN_PETRI_NET -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/nonblocking-cntr-alt.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.3-wip.fs.rabin-petrinet-4c29625-m [2023-10-12 17:42:01,192 INFO L172 SettingsManager]: Resetting all preferences to default values... [2023-10-12 17:42:01,414 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 17:42:01,432 INFO L114 SettingsManager]: Preferences different from defaults after loading the file: [2023-10-12 17:42:01,433 INFO L135 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-10-12 17:42:01,433 INFO L137 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-10-12 17:42:01,434 INFO L135 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-10-12 17:42:01,434 INFO L137 SettingsManager]: * Create parallel compositions if possible=false [2023-10-12 17:42:01,435 INFO L137 SettingsManager]: * Use SBE=true [2023-10-12 17:42:01,435 INFO L135 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2023-10-12 17:42:01,435 INFO L137 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2023-10-12 17:42:01,436 INFO L137 SettingsManager]: * Use old map elimination=false [2023-10-12 17:42:01,436 INFO L137 SettingsManager]: * Use external solver (rank synthesis)=false [2023-10-12 17:42:01,436 INFO L137 SettingsManager]: * Use only trivial implications for array writes=true [2023-10-12 17:42:01,437 INFO L137 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2023-10-12 17:42:01,437 INFO L135 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-10-12 17:42:01,437 INFO L137 SettingsManager]: * sizeof long=4 [2023-10-12 17:42:01,438 INFO L137 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-10-12 17:42:01,438 INFO L137 SettingsManager]: * Overapproximate operations on floating types=true [2023-10-12 17:42:01,438 INFO L137 SettingsManager]: * sizeof POINTER=4 [2023-10-12 17:42:01,439 INFO L137 SettingsManager]: * Check division by zero=IGNORE [2023-10-12 17:42:01,441 INFO L137 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2023-10-12 17:42:01,442 INFO L137 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2023-10-12 17:42:01,442 INFO L137 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2023-10-12 17:42:01,442 INFO L137 SettingsManager]: * sizeof long double=12 [2023-10-12 17:42:01,443 INFO L137 SettingsManager]: * Check if freed pointer was valid=false [2023-10-12 17:42:01,443 INFO L137 SettingsManager]: * Assume nondeterminstic values are in range=false [2023-10-12 17:42:01,443 INFO L137 SettingsManager]: * Use constant arrays=true [2023-10-12 17:42:01,444 INFO L137 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2023-10-12 17:42:01,444 INFO L135 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-10-12 17:42:01,444 INFO L137 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-10-12 17:42:01,444 INFO L135 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-10-12 17:42:01,445 INFO L137 SettingsManager]: * Trace refinement strategy=CAMEL [2023-10-12 17:42:01,446 INFO L135 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2023-10-12 17:42:01,446 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer: Automaton type for concurrent programs -> RABIN_PETRI_NET [2023-10-12 17:42:01,678 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-10-12 17:42:01,702 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-10-12 17:42:01,704 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-10-12 17:42:01,706 INFO L270 PluginConnector]: Initializing Boogie PL CUP Parser... [2023-10-12 17:42:01,706 INFO L274 PluginConnector]: Boogie PL CUP Parser initialized [2023-10-12 17:42:01,707 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/nonblocking-cntr-alt.wvr.bpl [2023-10-12 17:42:01,708 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/nonblocking-cntr-alt.wvr.bpl' [2023-10-12 17:42:01,739 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-10-12 17:42:01,741 INFO L133 ToolchainWalker]: Walking toolchain with 4 elements. [2023-10-12 17:42:01,742 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-10-12 17:42:01,742 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-10-12 17:42:01,742 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-10-12 17:42:01,752 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "nonblocking-cntr-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.10 05:42:01" (1/1) ... [2023-10-12 17:42:01,760 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "nonblocking-cntr-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.10 05:42:01" (1/1) ... [2023-10-12 17:42:01,765 INFO L138 Inliner]: procedures = 3, calls = 2, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2023-10-12 17:42:01,766 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-10-12 17:42:01,768 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-10-12 17:42:01,768 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-10-12 17:42:01,769 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-10-12 17:42:01,774 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "nonblocking-cntr-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.10 05:42:01" (1/1) ... [2023-10-12 17:42:01,774 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "nonblocking-cntr-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.10 05:42:01" (1/1) ... [2023-10-12 17:42:01,774 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "nonblocking-cntr-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.10 05:42:01" (1/1) ... [2023-10-12 17:42:01,775 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "nonblocking-cntr-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.10 05:42:01" (1/1) ... [2023-10-12 17:42:01,776 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "nonblocking-cntr-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.10 05:42:01" (1/1) ... [2023-10-12 17:42:01,779 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "nonblocking-cntr-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.10 05:42:01" (1/1) ... [2023-10-12 17:42:01,779 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "nonblocking-cntr-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.10 05:42:01" (1/1) ... [2023-10-12 17:42:01,780 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "nonblocking-cntr-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.10 05:42:01" (1/1) ... [2023-10-12 17:42:01,781 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-10-12 17:42:01,782 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-10-12 17:42:01,782 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-10-12 17:42:01,782 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-10-12 17:42:01,783 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "nonblocking-cntr-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.10 05:42:01" (1/1) ... [2023-10-12 17:42:01,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-10-12 17:42:01,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-10-12 17:42:01,818 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 17:42:01,829 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 17:42:01,850 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2023-10-12 17:42:01,851 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-10-12 17:42:01,851 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-10-12 17:42:01,851 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2023-10-12 17:42:01,851 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-10-12 17:42:01,851 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-10-12 17:42:01,851 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2023-10-12 17:42:01,852 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-10-12 17:42:01,852 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-10-12 17:42:01,852 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 17:42:01,901 INFO L236 CfgBuilder]: Building ICFG [2023-10-12 17:42:01,902 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-10-12 17:42:01,977 INFO L277 CfgBuilder]: Performing block encoding [2023-10-12 17:42:01,989 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-10-12 17:42:01,989 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-10-12 17:42:01,990 INFO L201 PluginConnector]: Adding new model nonblocking-cntr-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 05:42:01 BoogieIcfgContainer [2023-10-12 17:42:01,991 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-10-12 17:42:01,991 INFO L112 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2023-10-12 17:42:01,992 INFO L270 PluginConnector]: Initializing BuchiAutomizer... [2023-10-12 17:42:01,995 INFO L274 PluginConnector]: BuchiAutomizer initialized [2023-10-12 17:42:01,995 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2023-10-12 17:42:01,995 INFO L184 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "nonblocking-cntr-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.10 05:42:01" (1/2) ... [2023-10-12 17:42:01,996 INFO L204 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@25a332a0 and model type nonblocking-cntr-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 12.10 05:42:01, skipping insertion in model container [2023-10-12 17:42:01,996 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2023-10-12 17:42:01,997 INFO L184 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "nonblocking-cntr-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 05:42:01" (2/2) ... [2023-10-12 17:42:01,998 INFO L332 chiAutomizerObserver]: Analyzing ICFG nonblocking-cntr-alt.wvr.bpl [2023-10-12 17:42:02,039 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-10-12 17:42:02,057 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 28 places, 25 transitions, 66 flow [2023-10-12 17:42:02,074 INFO L124 PetriNetUnfolderBase]: 2/21 cut-off events. [2023-10-12 17:42:02,074 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-10-12 17:42:02,077 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30 conditions, 21 events. 2/21 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 15 event pairs, 0 based on Foata normal form. 0/18 useless extension candidates. Maximal degree in co-relation 12. Up to 2 conditions per place. [2023-10-12 17:42:02,077 INFO L82 GeneralOperation]: Start removeDead. Operand has 28 places, 25 transitions, 66 flow [2023-10-12 17:42:02,081 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 26 places, 21 transitions, 54 flow [2023-10-12 17:42:02,083 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-10-12 17:42:02,095 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 26 places, 21 transitions, 54 flow [2023-10-12 17:42:02,111 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 26 places, 21 transitions, 54 flow [2023-10-12 17:42:02,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 26 places, 21 transitions, 54 flow [2023-10-12 17:42:02,117 INFO L124 PetriNetUnfolderBase]: 2/21 cut-off events. [2023-10-12 17:42:02,117 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-10-12 17:42:02,117 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30 conditions, 21 events. 2/21 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 15 event pairs, 0 based on Foata normal form. 0/18 useless extension candidates. Maximal degree in co-relation 12. Up to 2 conditions per place. [2023-10-12 17:42:02,118 INFO L119 LiptonReduction]: Number of co-enabled transitions 48 [2023-10-12 17:42:02,358 INFO L134 LiptonReduction]: Checked pairs total: 43 [2023-10-12 17:42:02,358 INFO L136 LiptonReduction]: Total number of compositions: 11 [2023-10-12 17:42:02,370 INFO L305 stractBuchiCegarLoop]: Interprodecural is true [2023-10-12 17:42:02,370 INFO L306 stractBuchiCegarLoop]: Hoare is false [2023-10-12 17:42:02,370 INFO L307 stractBuchiCegarLoop]: Compute interpolants for ForwardPredicates [2023-10-12 17:42:02,370 INFO L308 stractBuchiCegarLoop]: Backedges is STRAIGHT_LINE [2023-10-12 17:42:02,370 INFO L309 stractBuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2023-10-12 17:42:02,370 INFO L310 stractBuchiCegarLoop]: Difference is false [2023-10-12 17:42:02,370 INFO L311 stractBuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2023-10-12 17:42:02,370 INFO L315 stractBuchiCegarLoop]: ======== Iteration 0 == of CEGAR loop == RabinPetriNetCegarLoop ======== [2023-10-12 17:42:02,371 INFO L67 RabinIsEmpty]: Start rabinIsEmpty. Operand has 16 places, 11 transitions, 34 flow [2023-10-12 17:42:02,374 ERROR L47 etriNetUnfolderRabin]: [1:1A:[78] $Ultimate##0-->L45: Formula: (and (= v_j2_20 0) (= v_counter_32 0) (= v_j1_18 0) (< 0 v_M2_15) (< 0 v_M1_15)) InVars {counter=v_counter_32, j2=v_j2_20, j1=v_j1_18, M1=v_M1_15, M2=v_M2_15} OutVars{counter=v_counter_32, j2=v_j2_20, j1=v_j1_18, M1=v_M1_15, M2=v_M2_15} AuxVars[] AssignedVars[][10], 2:2A:[62] L45-->L19-1: Formula: (= v_thread1Thread1of1ForFork0_thidvar0_2 1) InVars {} OutVars{thread1Thread1of1ForFork0_thidvar0=v_thread1Thread1of1ForFork0_thidvar0_2} AuxVars[] AssignedVars[thread1Thread1of1ForFork0_thidvar0][2]][3:3A:[69] L19-1-->L19-1: Formula: (and (< v_j1_13 v_M1_7) (= v_counter_16 (+ v_counter_17 1)) (= (+ v_j1_13 1) v_j1_12)) InVars {counter=v_counter_17, j1=v_j1_13, M1=v_M1_7} OutVars{counter=v_counter_16, j1=v_j1_12, M1=v_M1_7} AuxVars[] AssignedVars[counter, j1][7]] [2023-10-12 17:42:02,375 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-10-12 17:42:02,376 INFO L124 PetriNetUnfolderBase]: 0/2 cut-off events. [2023-10-12 17:42:02,376 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-10-12 17:42:02,376 INFO L72 RabinIsEmpty]: Finished rabinIsEmpty language is not empty [2023-10-12 17:42:02,379 INFO L337 stractBuchiCegarLoop]: ======== Iteration 1 ============ [2023-10-12 17:42:02,379 INFO L67 RabinIsEmpty]: Start rabinIsEmpty. Operand has 16 places, 11 transitions, 34 flow [2023-10-12 17:42:02,380 ERROR L47 etriNetUnfolderRabin]: [1:1A:[78] $Ultimate##0-->L45: Formula: (and (= v_j2_20 0) (= v_counter_32 0) (= v_j1_18 0) (< 0 v_M2_15) (< 0 v_M1_15)) InVars {counter=v_counter_32, j2=v_j2_20, j1=v_j1_18, M1=v_M1_15, M2=v_M2_15} OutVars{counter=v_counter_32, j2=v_j2_20, j1=v_j1_18, M1=v_M1_15, M2=v_M2_15} AuxVars[] AssignedVars[][10], 2:2A:[62] L45-->L19-1: Formula: (= v_thread1Thread1of1ForFork0_thidvar0_2 1) InVars {} OutVars{thread1Thread1of1ForFork0_thidvar0=v_thread1Thread1of1ForFork0_thidvar0_2} AuxVars[] AssignedVars[thread1Thread1of1ForFork0_thidvar0][2]][3:3A:[69] L19-1-->L19-1: Formula: (and (< v_j1_13 v_M1_7) (= v_counter_16 (+ v_counter_17 1)) (= (+ v_j1_13 1) v_j1_12)) InVars {counter=v_counter_17, j1=v_j1_13, M1=v_M1_7} OutVars{counter=v_counter_16, j1=v_j1_12, M1=v_M1_7} AuxVars[] AssignedVars[counter, j1][7]] [2023-10-12 17:42:02,380 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-10-12 17:42:02,380 INFO L124 PetriNetUnfolderBase]: 0/2 cut-off events. [2023-10-12 17:42:02,380 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-10-12 17:42:02,380 INFO L72 RabinIsEmpty]: Finished rabinIsEmpty language is not empty [2023-10-12 17:42:02,384 INFO L748 eck$LassoCheckResult]: Stem: 32#[$Ultimate##0]true [78] $Ultimate##0-->L45: Formula: (and (= v_j2_20 0) (= v_counter_32 0) (= v_j1_18 0) (< 0 v_M2_15) (< 0 v_M1_15)) InVars {counter=v_counter_32, j2=v_j2_20, j1=v_j1_18, M1=v_M1_15, M2=v_M2_15} OutVars{counter=v_counter_32, j2=v_j2_20, j1=v_j1_18, M1=v_M1_15, M2=v_M2_15} AuxVars[] AssignedVars[] 34#[L45]true [62] L45-->L19-1: Formula: (= v_thread1Thread1of1ForFork0_thidvar0_2 1) InVars {} OutVars{thread1Thread1of1ForFork0_thidvar0=v_thread1Thread1of1ForFork0_thidvar0_2} AuxVars[] AssignedVars[thread1Thread1of1ForFork0_thidvar0] 36#[L19-1, L45-1]true [2023-10-12 17:42:02,385 INFO L750 eck$LassoCheckResult]: Loop: 36#[L19-1, L45-1]true [69] L19-1-->L19-1: Formula: (and (< v_j1_13 v_M1_7) (= v_counter_16 (+ v_counter_17 1)) (= (+ v_j1_13 1) v_j1_12)) InVars {counter=v_counter_17, j1=v_j1_13, M1=v_M1_7} OutVars{counter=v_counter_16, j1=v_j1_12, M1=v_M1_7} AuxVars[] AssignedVars[counter, j1] 36#[L19-1, L45-1]true [2023-10-12 17:42:02,388 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-10-12 17:42:02,389 INFO L85 PathProgramCache]: Analyzing trace with hash 3441, now seen corresponding path program 1 times [2023-10-12 17:42:02,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-10-12 17:42:02,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343937439] [2023-10-12 17:42:02,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-10-12 17:42:02,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-10-12 17:42:02,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-10-12 17:42:02,450 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-10-12 17:42:02,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-10-12 17:42:02,464 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-10-12 17:42:02,467 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-10-12 17:42:02,467 INFO L85 PathProgramCache]: Analyzing trace with hash 100, now seen corresponding path program 1 times [2023-10-12 17:42:02,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-10-12 17:42:02,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441511955] [2023-10-12 17:42:02,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-10-12 17:42:02,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-10-12 17:42:02,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-10-12 17:42:02,475 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-10-12 17:42:02,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-10-12 17:42:02,480 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-10-12 17:42:02,481 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-10-12 17:42:02,481 INFO L85 PathProgramCache]: Analyzing trace with hash 106740, now seen corresponding path program 1 times [2023-10-12 17:42:02,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-10-12 17:42:02,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477232381] [2023-10-12 17:42:02,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-10-12 17:42:02,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-10-12 17:42:02,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-10-12 17:42:02,489 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-10-12 17:42:02,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-10-12 17:42:02,494 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-10-12 17:42:02,564 INFO L210 LassoAnalysis]: Preferences: [2023-10-12 17:42:02,565 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-10-12 17:42:02,565 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-10-12 17:42:02,565 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-10-12 17:42:02,565 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2023-10-12 17:42:02,566 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-10-12 17:42:02,566 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-10-12 17:42:02,566 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-10-12 17:42:02,566 INFO L133 ssoRankerPreferences]: Filename of dumped script: nonblocking-cntr-alt.wvr.bpl_BEv2_Iteration1_Loop [2023-10-12 17:42:02,566 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-10-12 17:42:02,566 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-10-12 17:42:02,578 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 17:42:02,590 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 17:42:02,628 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-10-12 17:42:02,629 INFO L404 LassoAnalysis]: Checking for nontermination... [2023-10-12 17:42:02,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-10-12 17:42:02,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-10-12 17:42:02,724 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 17:42:02,726 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 17:42:02,727 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-10-12 17:42:02,727 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-10-12 17:42:02,741 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 17:42:02,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-10-12 17:42:02,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-10-12 17:42:02,743 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 17:42:02,744 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 17:42:02,746 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2023-10-12 17:42:02,746 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-10-12 17:42:02,780 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-10-12 17:42:02,781 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {counter=0} Honda state: {counter=0} Generalized eigenvectors: [{counter=1}, {counter=-2}, {counter=2}] Lambdas: [1, 2, 1] Nus: [0, 1] [2023-10-12 17:42:02,798 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 17:42:02,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-10-12 17:42:02,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-10-12 17:42:02,825 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 17:42:02,826 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 17:42:02,829 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-10-12 17:42:02,829 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-10-12 17:42:02,851 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 17:42:02,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-10-12 17:42:02,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-10-12 17:42:02,853 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 17:42:02,854 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 17:42:02,856 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2023-10-12 17:42:02,856 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-10-12 17:42:02,964 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2023-10-12 17:42:02,969 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 17:42:02,969 INFO L210 LassoAnalysis]: Preferences: [2023-10-12 17:42:02,970 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-10-12 17:42:02,970 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-10-12 17:42:02,970 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-10-12 17:42:02,970 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2023-10-12 17:42:02,970 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-10-12 17:42:02,970 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-10-12 17:42:02,970 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-10-12 17:42:02,970 INFO L133 ssoRankerPreferences]: Filename of dumped script: nonblocking-cntr-alt.wvr.bpl_BEv2_Iteration1_Loop [2023-10-12 17:42:02,970 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-10-12 17:42:02,970 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-10-12 17:42:02,971 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 17:42:02,976 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 17:42:03,012 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-10-12 17:42:03,017 INFO L490 LassoAnalysis]: Using template 'affine'. [2023-10-12 17:42:03,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-10-12 17:42:03,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-10-12 17:42:03,019 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 17:42:03,032 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 17:42:03,040 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 17:42:03,041 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-10-12 17:42:03,041 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-10-12 17:42:03,042 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-10-12 17:42:03,042 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-10-12 17:42:03,042 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-10-12 17:42:03,043 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-10-12 17:42:03,043 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-10-12 17:42:03,053 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-10-12 17:42:03,059 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 17:42:03,059 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-10-12 17:42:03,059 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-10-12 17:42:03,061 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 17:42:03,067 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 17:42:03,067 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 17:42:03,074 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-10-12 17:42:03,074 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-10-12 17:42:03,074 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-10-12 17:42:03,075 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-10-12 17:42:03,075 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-10-12 17:42:03,076 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-10-12 17:42:03,076 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-10-12 17:42:03,091 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2023-10-12 17:42:03,094 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2023-10-12 17:42:03,094 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 0 variables to zero. [2023-10-12 17:42:03,095 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-10-12 17:42:03,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-10-12 17:42:03,097 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 17:42:03,098 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 17:42:03,099 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2023-10-12 17:42:03,099 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2023-10-12 17:42:03,099 INFO L513 LassoAnalysis]: Proved termination. [2023-10-12 17:42:03,100 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(M1, j1) = 1*M1 - 1*j1 Supporting invariants [] [2023-10-12 17:42:03,105 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Ended with exit code 0 [2023-10-12 17:42:03,109 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2023-10-12 17:42:03,131 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-10-12 17:42:03,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-10-12 17:42:03,141 INFO L262 TraceCheckSpWp]: Trace formula consists of 12 conjuncts, 2 conjunts are in the unsatisfiable core [2023-10-12 17:42:03,142 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-10-12 17:42:03,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-10-12 17:42:03,154 WARN L260 TraceCheckSpWp]: Trace formula consists of 7 conjuncts, 4 conjunts are in the unsatisfiable core [2023-10-12 17:42:03,154 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-10-12 17:42:03,155 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 17:42:03,180 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 17:42:03,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 1 non-accepting loop states 1 accepting loop states [2023-10-12 17:42:03,250 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 17:42:03,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 144 transitions. [2023-10-12 17:42:03,254 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 144 transitions. Stem has 2 letters. Loop has 1 letters. [2023-10-12 17:42:03,255 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-10-12 17:42:03,255 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 144 transitions. Stem has 3 letters. Loop has 1 letters. [2023-10-12 17:42:03,255 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-10-12 17:42:03,255 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 144 transitions. Stem has 2 letters. Loop has 2 letters. [2023-10-12 17:42:03,255 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-10-12 17:42:03,255 INFO L430 stractBuchiCegarLoop]: Abstraction has has 20 places, 44 transitions, 224 flow [2023-10-12 17:42:03,255 INFO L337 stractBuchiCegarLoop]: ======== Iteration 2 ============ [2023-10-12 17:42:03,256 INFO L67 RabinIsEmpty]: Start rabinIsEmpty. Operand has 20 places, 44 transitions, 224 flow [2023-10-12 17:42:03,257 ERROR L47 etriNetUnfolderRabin]: [1:1A:[78] $Ultimate##0-->L45: Formula: (and (= v_j2_20 0) (= v_counter_32 0) (= v_j1_18 0) (< 0 v_M2_15) (< 0 v_M1_15)) InVars {counter=v_counter_32, j2=v_j2_20, j1=v_j1_18, M1=v_M1_15, M2=v_M2_15} OutVars{counter=v_counter_32, j2=v_j2_20, j1=v_j1_18, M1=v_M1_15, M2=v_M2_15} AuxVars[] AssignedVars[][40], 2:2A:[62] L45-->L19-1: Formula: (= v_thread1Thread1of1ForFork0_thidvar0_2 1) InVars {} OutVars{thread1Thread1of1ForFork0_thidvar0=v_thread1Thread1of1ForFork0_thidvar0_2} AuxVars[] AssignedVars[thread1Thread1of1ForFork0_thidvar0][8], 4:3A:[65] L45-1-->L30-1: Formula: (and (= 2 v_thread2Thread1of1ForFork1_thidvar1_2) (= 2 v_thread2Thread1of1ForFork1_thidvar0_2)) InVars {} OutVars{thread2Thread1of1ForFork1_thidvar0=v_thread2Thread1of1ForFork1_thidvar0_2, thread2Thread1of1ForFork1_thidvar1=v_thread2Thread1of1ForFork1_thidvar1_2} AuxVars[] AssignedVars[thread2Thread1of1ForFork1_thidvar0, thread2Thread1of1ForFork1_thidvar1][14]][5:4A:[72] L30-1-->L30-1: Formula: (let ((.cse0 (< 0 v_counter_21))) (and (= v_counter_20 (ite .cse0 (+ v_counter_21 (- 1)) v_counter_21)) (= v_j2_12 (ite .cse0 (+ v_j2_13 1) v_j2_13)) (< v_j2_13 v_M2_9))) InVars {counter=v_counter_21, j2=v_j2_13, M2=v_M2_9} OutVars{counter=v_counter_20, j2=v_j2_12, M2=v_M2_9} AuxVars[] AssignedVars[counter, j2][35]] [2023-10-12 17:42:03,257 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-10-12 17:42:03,258 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2023-10-12 17:42:03,258 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-10-12 17:42:03,258 INFO L72 RabinIsEmpty]: Finished rabinIsEmpty language is not empty [2023-10-12 17:42:03,258 INFO L748 eck$LassoCheckResult]: Stem: 32#[$Ultimate##0]true [78] $Ultimate##0-->L45: Formula: (and (= v_j2_20 0) (= v_counter_32 0) (= v_j1_18 0) (< 0 v_M2_15) (< 0 v_M1_15)) InVars {counter=v_counter_32, j2=v_j2_20, j1=v_j1_18, M1=v_M1_15, M2=v_M2_15} OutVars{counter=v_counter_32, j2=v_j2_20, j1=v_j1_18, M1=v_M1_15, M2=v_M2_15} AuxVars[] AssignedVars[] 34#[L45]true [62] L45-->L19-1: Formula: (= v_thread1Thread1of1ForFork0_thidvar0_2 1) InVars {} OutVars{thread1Thread1of1ForFork0_thidvar0=v_thread1Thread1of1ForFork0_thidvar0_2} AuxVars[] AssignedVars[thread1Thread1of1ForFork0_thidvar0] 36#[L19-1, L45-1]true [65] L45-1-->L30-1: Formula: (and (= 2 v_thread2Thread1of1ForFork1_thidvar1_2) (= 2 v_thread2Thread1of1ForFork1_thidvar0_2)) InVars {} OutVars{thread2Thread1of1ForFork1_thidvar0=v_thread2Thread1of1ForFork1_thidvar0_2, thread2Thread1of1ForFork1_thidvar1=v_thread2Thread1of1ForFork1_thidvar1_2} AuxVars[] AssignedVars[thread2Thread1of1ForFork1_thidvar0, thread2Thread1of1ForFork1_thidvar1] 71#[L19-1, L46, L30-1]true [2023-10-12 17:42:03,259 INFO L750 eck$LassoCheckResult]: Loop: 71#[L19-1, L46, L30-1]true [72] L30-1-->L30-1: Formula: (let ((.cse0 (< 0 v_counter_21))) (and (= v_counter_20 (ite .cse0 (+ v_counter_21 (- 1)) v_counter_21)) (= v_j2_12 (ite .cse0 (+ v_j2_13 1) v_j2_13)) (< v_j2_13 v_M2_9))) InVars {counter=v_counter_21, j2=v_j2_13, M2=v_M2_9} OutVars{counter=v_counter_20, j2=v_j2_12, M2=v_M2_9} AuxVars[] AssignedVars[counter, j2] 71#[L19-1, L46, L30-1]true [2023-10-12 17:42:03,259 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-10-12 17:42:03,259 INFO L85 PathProgramCache]: Analyzing trace with hash 106736, now seen corresponding path program 1 times [2023-10-12 17:42:03,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-10-12 17:42:03,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822073958] [2023-10-12 17:42:03,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-10-12 17:42:03,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-10-12 17:42:03,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-10-12 17:42:03,264 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-10-12 17:42:03,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-10-12 17:42:03,268 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-10-12 17:42:03,269 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-10-12 17:42:03,269 INFO L85 PathProgramCache]: Analyzing trace with hash 103, now seen corresponding path program 1 times [2023-10-12 17:42:03,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-10-12 17:42:03,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656667865] [2023-10-12 17:42:03,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-10-12 17:42:03,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-10-12 17:42:03,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-10-12 17:42:03,275 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-10-12 17:42:03,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-10-12 17:42:03,281 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-10-12 17:42:03,282 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-10-12 17:42:03,282 INFO L85 PathProgramCache]: Analyzing trace with hash 3308888, now seen corresponding path program 1 times [2023-10-12 17:42:03,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-10-12 17:42:03,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482784888] [2023-10-12 17:42:03,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-10-12 17:42:03,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-10-12 17:42:03,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-10-12 17:42:03,289 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-10-12 17:42:03,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-10-12 17:42:03,296 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-10-12 17:42:03,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-10-12 17:42:03,409 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-10-12 17:42:03,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-10-12 17:42:03,429 INFO L201 PluginConnector]: Adding new model nonblocking-cntr-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 12.10 05:42:03 BoogieIcfgContainer [2023-10-12 17:42:03,430 INFO L131 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2023-10-12 17:42:03,431 INFO L158 Benchmark]: Toolchain (without parser) took 1689.72ms. Allocated memory was 186.6MB in the beginning and 285.2MB in the end (delta: 98.6MB). Free memory was 141.3MB in the beginning and 197.6MB in the end (delta: -56.4MB). Peak memory consumption was 42.1MB. Max. memory is 8.0GB. [2023-10-12 17:42:03,431 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.25ms. Allocated memory is still 186.6MB. Free memory is still 142.4MB. There was no memory consumed. Max. memory is 8.0GB. [2023-10-12 17:42:03,431 INFO L158 Benchmark]: Boogie Procedure Inliner took 24.98ms. Allocated memory is still 186.6MB. Free memory was 141.3MB in the beginning and 139.7MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-10-12 17:42:03,432 INFO L158 Benchmark]: Boogie Preprocessor took 12.89ms. Allocated memory is still 186.6MB. Free memory was 139.7MB in the beginning and 138.6MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2023-10-12 17:42:03,432 INFO L158 Benchmark]: RCFGBuilder took 208.82ms. Allocated memory is still 186.6MB. Free memory was 138.6MB in the beginning and 129.0MB in the end (delta: 9.6MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2023-10-12 17:42:03,433 INFO L158 Benchmark]: BuchiAutomizer took 1438.41ms. Allocated memory was 186.6MB in the beginning and 285.2MB in the end (delta: 98.6MB). Free memory was 129.0MB in the beginning and 197.6MB in the end (delta: -68.6MB). Peak memory consumption was 29.5MB. Max. memory is 8.0GB. [2023-10-12 17:42:03,435 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 0.25ms. Allocated memory is still 186.6MB. Free memory is still 142.4MB. There was no memory consumed. Max. memory is 8.0GB. * Boogie Procedure Inliner took 24.98ms. Allocated memory is still 186.6MB. Free memory was 141.3MB in the beginning and 139.7MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 12.89ms. Allocated memory is still 186.6MB. Free memory was 139.7MB in the beginning and 138.6MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 208.82ms. Allocated memory is still 186.6MB. Free memory was 138.6MB in the beginning and 129.0MB in the end (delta: 9.6MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * BuchiAutomizer took 1438.41ms. Allocated memory was 186.6MB in the beginning and 285.2MB in the end (delta: 98.6MB). Free memory was 129.0MB in the beginning and 197.6MB in the end (delta: -68.6MB). Peak memory consumption was 29.5MB. 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 1 terminating modules (0 trivial, 1 deterministic, 0 nondeterministic) and one nonterminating remainder module.One deterministic module has affine ranking function -1 * j1 + M1 and consists of 4 locations. The remainder module has 224 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 1.3s and 2 iterations. TraceHistogramMax:0. Analysis of lassos took 0.8s. Construction of modules took 0.0s. Büchi inclusion checks took 0.1s. Highest rank in rank-based complementation 0. Minimization of det autom 0. Minimization of nondet autom 0. Automata minimization No data available. 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 [1, 0, 0, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/0 HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 64 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 63 mSDsluCounter, 44 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 13 mSDsCounter, 2 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 54 IncrementalHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 2 mSolverCounterUnsat, 31 mSDtfsCounter, 54 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown LassoAnalysisResults: nont1 unkn0 SFLI0 SFLT1 conc0 concLT0 SILN0 SILU0 SILI0 SILT0 lasso0 LassoPreprocessingBenchmarks: Lassos: inital15 mio100 ax100 hnf100 lsp66 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq160 hnf93 smp100 dnf100 smp100 tf113 neg100 sie111 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 35ms VariablesStem: 0 VariablesLoop: 2 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 0 LassoNonterminationAnalysisSatUnbounded: 1 LassoNonterminationAnalysisUnsat: 1 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 0.3s InitialAbstractionConstructionTime: 0.3s - TerminationAnalysisResult: Nontermination possible Buchi Automizer proved that your program is nonterminating for some inputs - LassoShapedNonTerminationArgument [Line: 29]: Nontermination argument in form of an infinite program execution. Nontermination argument in form of an infinite program execution. Stem: [L40] 0 assume j1 == 0; [L41] 0 assume j2 == 0; [L42] 0 assume counter == 0; [L43] 0 assume 0 < M1; [L44] 0 assume 0 < M2; VAL [M1=1, M2=1, counter=0, j1=0, j2=0] [L45] FORK 0 fork 1 thread1(); VAL [M1=1, M2=1, counter=0, j1=0, j2=0] [L46] FORK 0 fork 2, 2 thread2(); VAL [M1=1, M2=1, counter=0, j1=0, j2=0] Loop: [L29] COND TRUE j2 < M2 [L31] j2 := (if 0 < counter then j2 + 1 else j2); [L32] counter := (if 0 < counter then counter - 1 else counter); End of lasso representation. - StatisticsResult: NonterminationArgumentStatistics Fixpoint - NonterminatingLassoResult [Line: 29]: Nonterminating execution Found a nonterminating execution for the following lasso shaped sequence of statements. Stem: [L40] 0 assume j1 == 0; [L41] 0 assume j2 == 0; [L42] 0 assume counter == 0; [L43] 0 assume 0 < M1; [L44] 0 assume 0 < M2; VAL [M1=1, M2=1, counter=0, j1=0, j2=0] [L45] FORK 0 fork 1 thread1(); VAL [M1=1, M2=1, counter=0, j1=0, j2=0] [L46] FORK 0 fork 2, 2 thread2(); VAL [M1=1, M2=1, counter=0, j1=0, j2=0] Loop: [L29] COND TRUE j2 < M2 [L31] j2 := (if 0 < counter then j2 + 1 else j2); [L32] counter := (if 0 < counter then counter - 1 else counter); End of lasso representation. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 0.2s, 26 PlacesBefore, 16 PlacesAfterwards, 21 TransitionsBefore, 11 TransitionsAfterwards, 48 CoEnabledTransitionPairs, 3 FixpointIterations, 7 TrivialSequentialCompositions, 4 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 11 TotalNumberOfCompositions, 43 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 43, independent: 43, independent conditional: 0, independent unconditional: 43, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 28, independent: 28, independent conditional: 0, independent unconditional: 28, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 28, independent: 28, independent conditional: 0, independent unconditional: 28, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 0, independent: 0, independent conditional: 0, independent unconditional: 0, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 0, independent: 0, independent conditional: 0, independent unconditional: 0, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 43, independent: 15, independent conditional: 0, independent unconditional: 15, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 28, unknown conditional: 0, unknown unconditional: 28] , Statistics on independence cache: Total cache size (in pairs): 6, Positive cache size: 6, Positive conditional cache size: 0, Positive unconditional cache size: 6, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0, 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 17:42:03,453 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 17:42:03,655 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...