./Ultimate.py --spec ../sv-benchmarks/c/properties/termination.prp --file ../sv-benchmarks/c/systemc/pipeline.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version 8be7027f Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerTermination.xml -i ../sv-benchmarks/c/systemc/pipeline.cil-1.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(F end) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 79bbe68806c3ba3852cd8c209d4ce80dca551636a131cc65daaf97524d927c63 --- Real Ultimate output --- This is Ultimate 0.2.5-wip.dk.perfect-tracechecks-8be7027-m [2024-11-12 21:44:40,574 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-12 21:44:40,653 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-32bit-Automizer_Default.epf [2024-11-12 21:44:40,660 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-12 21:44:40,661 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-12 21:44:40,691 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-12 21:44:40,692 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-12 21:44:40,692 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-12 21:44:40,693 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-12 21:44:40,696 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-12 21:44:40,697 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-12 21:44:40,697 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-12 21:44:40,697 INFO L153 SettingsManager]: * Use SBE=true [2024-11-12 21:44:40,698 INFO L151 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2024-11-12 21:44:40,698 INFO L153 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2024-11-12 21:44:40,699 INFO L153 SettingsManager]: * Use old map elimination=false [2024-11-12 21:44:40,699 INFO L153 SettingsManager]: * Use external solver (rank synthesis)=false [2024-11-12 21:44:40,699 INFO L153 SettingsManager]: * Use only trivial implications for array writes=true [2024-11-12 21:44:40,700 INFO L153 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2024-11-12 21:44:40,700 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-12 21:44:40,701 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2024-11-12 21:44:40,701 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-12 21:44:40,701 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-12 21:44:40,702 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-12 21:44:40,702 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-12 21:44:40,703 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2024-11-12 21:44:40,703 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2024-11-12 21:44:40,703 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2024-11-12 21:44:40,704 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-12 21:44:40,704 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-12 21:44:40,704 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-12 21:44:40,708 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-12 21:44:40,709 INFO L153 SettingsManager]: * Assume nondeterminstic values are in range=false [2024-11-12 21:44:40,709 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-12 21:44:40,709 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-12 21:44:40,709 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-12 21:44:40,710 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-12 21:44:40,710 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-12 21:44:40,710 INFO L151 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2024-11-12 21:44:40,711 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 79bbe68806c3ba3852cd8c209d4ce80dca551636a131cc65daaf97524d927c63 [2024-11-12 21:44:40,947 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-12 21:44:40,974 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-12 21:44:40,977 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-12 21:44:40,978 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-12 21:44:40,979 INFO L274 PluginConnector]: CDTParser initialized [2024-11-12 21:44:40,981 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/systemc/pipeline.cil-1.c [2024-11-12 21:44:42,532 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-12 21:44:42,753 INFO L384 CDTParser]: Found 1 translation units. [2024-11-12 21:44:42,754 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/systemc/pipeline.cil-1.c [2024-11-12 21:44:42,768 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6fe96f81c/caa4eab4cfe946c698a84c2640458a48/FLAG7d429e390 [2024-11-12 21:44:42,781 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6fe96f81c/caa4eab4cfe946c698a84c2640458a48 [2024-11-12 21:44:42,784 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-12 21:44:42,785 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-12 21:44:42,786 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-12 21:44:42,786 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-12 21:44:42,790 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-12 21:44:42,791 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 09:44:42" (1/1) ... [2024-11-12 21:44:42,792 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c6dce72 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 09:44:42, skipping insertion in model container [2024-11-12 21:44:42,792 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 09:44:42" (1/1) ... [2024-11-12 21:44:42,826 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-12 21:44:43,067 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-12 21:44:43,080 INFO L200 MainTranslator]: Completed pre-run [2024-11-12 21:44:43,137 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-12 21:44:43,164 INFO L204 MainTranslator]: Completed translation [2024-11-12 21:44:43,164 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 09:44:43 WrapperNode [2024-11-12 21:44:43,165 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-12 21:44:43,166 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-12 21:44:43,166 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-12 21:44:43,166 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-12 21:44:43,173 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 09:44:43" (1/1) ... [2024-11-12 21:44:43,182 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 09:44:43" (1/1) ... [2024-11-12 21:44:43,224 INFO L138 Inliner]: procedures = 20, calls = 18, calls flagged for inlining = 13, calls inlined = 25, statements flattened = 1052 [2024-11-12 21:44:43,224 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-12 21:44:43,225 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-12 21:44:43,225 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-12 21:44:43,225 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-12 21:44:43,237 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 09:44:43" (1/1) ... [2024-11-12 21:44:43,238 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 09:44:43" (1/1) ... [2024-11-12 21:44:43,252 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 09:44:43" (1/1) ... [2024-11-12 21:44:43,290 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-11-12 21:44:43,290 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 09:44:43" (1/1) ... [2024-11-12 21:44:43,290 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 09:44:43" (1/1) ... [2024-11-12 21:44:43,303 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 09:44:43" (1/1) ... [2024-11-12 21:44:43,317 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 09:44:43" (1/1) ... [2024-11-12 21:44:43,319 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 09:44:43" (1/1) ... [2024-11-12 21:44:43,323 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 09:44:43" (1/1) ... [2024-11-12 21:44:43,329 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-12 21:44:43,330 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-12 21:44:43,330 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-12 21:44:43,330 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-12 21:44:43,331 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 09:44:43" (1/1) ... [2024-11-12 21:44:43,345 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-12 21:44:43,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 21:44:43,373 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) [2024-11-12 21:44:43,379 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 [2024-11-12 21:44:43,442 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-12 21:44:43,443 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-12 21:44:43,443 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-12 21:44:43,443 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-12 21:44:43,579 INFO L238 CfgBuilder]: Building ICFG [2024-11-12 21:44:43,581 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-12 21:44:44,708 INFO L? ?]: Removed 76 outVars from TransFormulas that were not future-live. [2024-11-12 21:44:44,708 INFO L287 CfgBuilder]: Performing block encoding [2024-11-12 21:44:44,742 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-12 21:44:44,743 INFO L316 CfgBuilder]: Removed 7 assume(true) statements. [2024-11-12 21:44:44,743 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 09:44:44 BoogieIcfgContainer [2024-11-12 21:44:44,743 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-12 21:44:44,745 INFO L112 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2024-11-12 21:44:44,745 INFO L270 PluginConnector]: Initializing BuchiAutomizer... [2024-11-12 21:44:44,748 INFO L274 PluginConnector]: BuchiAutomizer initialized [2024-11-12 21:44:44,749 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2024-11-12 21:44:44,749 INFO L184 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 12.11 09:44:42" (1/3) ... [2024-11-12 21:44:44,750 INFO L204 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@be936e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 12.11 09:44:44, skipping insertion in model container [2024-11-12 21:44:44,750 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2024-11-12 21:44:44,750 INFO L184 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 09:44:43" (2/3) ... [2024-11-12 21:44:44,750 INFO L204 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@be936e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 12.11 09:44:44, skipping insertion in model container [2024-11-12 21:44:44,751 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2024-11-12 21:44:44,751 INFO L184 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 09:44:44" (3/3) ... [2024-11-12 21:44:44,752 INFO L332 chiAutomizerObserver]: Analyzing ICFG pipeline.cil-1.c [2024-11-12 21:44:44,822 INFO L301 stractBuchiCegarLoop]: Interprodecural is true [2024-11-12 21:44:44,822 INFO L302 stractBuchiCegarLoop]: Hoare is None [2024-11-12 21:44:44,823 INFO L303 stractBuchiCegarLoop]: Compute interpolants for ForwardPredicates [2024-11-12 21:44:44,823 INFO L304 stractBuchiCegarLoop]: Backedges is STRAIGHT_LINE [2024-11-12 21:44:44,823 INFO L305 stractBuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2024-11-12 21:44:44,823 INFO L306 stractBuchiCegarLoop]: Difference is false [2024-11-12 21:44:44,823 INFO L307 stractBuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2024-11-12 21:44:44,823 INFO L311 stractBuchiCegarLoop]: ======== Iteration 0 == of CEGAR loop == BuchiAutomatonCegarLoop ======== [2024-11-12 21:44:44,830 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 423 states, 422 states have (on average 1.8127962085308056) internal successors, (765), 422 states have internal predecessors, (765), 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) [2024-11-12 21:44:44,865 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 361 [2024-11-12 21:44:44,866 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2024-11-12 21:44:44,866 INFO L119 BuchiIsEmpty]: Starting construction of run [2024-11-12 21:44:44,874 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 21:44:44,874 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 21:44:44,874 INFO L333 stractBuchiCegarLoop]: ======== Iteration 1 ============ [2024-11-12 21:44:44,875 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 423 states, 422 states have (on average 1.8127962085308056) internal successors, (765), 422 states have internal predecessors, (765), 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) [2024-11-12 21:44:44,891 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 361 [2024-11-12 21:44:44,892 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2024-11-12 21:44:44,892 INFO L119 BuchiIsEmpty]: Starting construction of run [2024-11-12 21:44:44,897 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 21:44:44,898 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 21:44:44,907 INFO L747 eck$LassoCheckResult]: Stem: "assume { :begin_inline_ULTIMATE.init } true;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int#0(48, 1, 0, 1);call write~init~int#0(0, 1, 1, 1);call #Ultimate.allocInit(17, 2);call #Ultimate.allocInit(12, 3);~main_in1_val~0 := 0;~main_in1_val_t~0 := 0;~main_in1_ev~0 := 0;~main_in1_req_up~0 := 0;~main_in2_val~0 := 0;~main_in2_val_t~0 := 0;~main_in2_ev~0 := 0;~main_in2_req_up~0 := 0;~main_diff_val~0 := 0;~main_diff_val_t~0 := 0;~main_diff_ev~0 := 0;~main_diff_req_up~0 := 0;~main_sum_val~0 := 0;~main_sum_val_t~0 := 0;~main_sum_ev~0 := 0;~main_sum_req_up~0 := 0;~main_pres_val~0 := 0;~main_pres_val_t~0 := 0;~main_pres_ev~0 := 0;~main_pres_req_up~0 := 0;~main_dbl_val~0 := 0;~main_dbl_val_t~0 := 0;~main_dbl_ev~0 := 0;~main_dbl_req_up~0 := 0;~main_zero_val~0 := 0;~main_zero_val_t~0 := 0;~main_zero_ev~0 := 0;~main_zero_req_up~0 := 0;~main_clk_val~0 := 0;~main_clk_val_t~0 := 0;~main_clk_ev~0 := 0;~main_clk_req_up~0 := 0;~main_clk_pos_edge~0 := 0;~main_clk_neg_edge~0 := 0;~N_generate_st~0 := 0;~N_generate_i~0 := 0;~S1_addsub_st~0 := 0;~S1_addsub_i~0 := 0;~S2_presdbl_st~0 := 0;~S2_presdbl_i~0 := 0;~S3_zero_st~0 := 0;~S3_zero_i~0 := 0;~D_z~0 := 0;~D_print_st~0 := 0;~D_print_i~0 := 0;" "assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_~count~0#1, main_~__retres2~0#1;havoc main_~count~0#1;havoc main_~__retres2~0#1;~main_in1_ev~0 := 2;~main_in1_req_up~0 := 0;~main_in2_ev~0 := 2;~main_in2_req_up~0 := 0;~main_diff_ev~0 := 2;~main_diff_req_up~0 := 0;~main_sum_ev~0 := 2;~main_sum_req_up~0 := 0;~main_pres_ev~0 := 2;~main_pres_req_up~0 := 0;~main_dbl_ev~0 := 2;~main_dbl_req_up~0 := 0;~main_zero_ev~0 := 2;~main_zero_req_up~0 := 0;~main_clk_val~0 := 0;~main_clk_ev~0 := 2;~main_clk_req_up~0 := 0;~main_clk_pos_edge~0 := 2;~main_clk_neg_edge~0 := 2;main_~count~0#1 := 0;~N_generate_i~0 := 0;~S1_addsub_i~0 := 0;~S2_presdbl_i~0 := 0;~S3_zero_i~0 := 0;~D_print_i~0 := 0;assume { :begin_inline_start_simulation } true;havoc start_simulation_~kernel_st~0#1;havoc start_simulation_~kernel_st~0#1;start_simulation_~kernel_st~0#1 := 0;" "assume !(1 == ~main_in1_req_up~0);" "assume !(1 == ~main_in2_req_up~0);" "assume !(1 == ~main_sum_req_up~0);" "assume !(1 == ~main_diff_req_up~0);" "assume !(1 == ~main_pres_req_up~0);" "assume !(1 == ~main_dbl_req_up~0);" "assume !(1 == ~main_zero_req_up~0);" "assume !(1 == ~main_clk_req_up~0);" "assume !(1 == ~N_generate_i~0);~N_generate_st~0 := 2;" "assume !(1 == ~S1_addsub_i~0);~S1_addsub_st~0 := 2;" "assume 1 == ~S2_presdbl_i~0;~S2_presdbl_st~0 := 0;" "assume !(1 == ~S3_zero_i~0);~S3_zero_st~0 := 2;" "assume !(1 == ~D_print_i~0);~D_print_st~0 := 2;" "assume !(0 == ~main_in1_ev~0);" "assume !(0 == ~main_in2_ev~0);" "assume !(0 == ~main_sum_ev~0);" "assume !(0 == ~main_diff_ev~0);" "assume !(0 == ~main_pres_ev~0);" "assume 0 == ~main_dbl_ev~0;~main_dbl_ev~0 := 1;" "assume !(0 == ~main_zero_ev~0);" "assume !(0 == ~main_clk_ev~0);" "assume !(0 == ~main_clk_pos_edge~0);" "assume !(0 == ~main_clk_neg_edge~0);" "assume !(1 == ~main_clk_pos_edge~0);" "assume !(1 == ~main_clk_pos_edge~0);" "assume !(1 == ~main_clk_pos_edge~0);" "assume 1 == ~main_clk_pos_edge~0;~S3_zero_st~0 := 0;" "assume !(1 == ~main_clk_pos_edge~0);" "assume !(1 == ~main_in1_ev~0);" "assume !(1 == ~main_in2_ev~0);" "assume !(1 == ~main_sum_ev~0);" "assume !(1 == ~main_diff_ev~0);" "assume !(1 == ~main_pres_ev~0);" "assume !(1 == ~main_dbl_ev~0);" "assume 1 == ~main_zero_ev~0;~main_zero_ev~0 := 2;" "assume !(1 == ~main_clk_ev~0);" "assume !(1 == ~main_clk_pos_edge~0);" "assume !(1 == ~main_clk_neg_edge~0);" [2024-11-12 21:44:44,908 INFO L749 eck$LassoCheckResult]: Loop: "assume !false;" "start_simulation_~kernel_st~0#1 := 1;assume { :begin_inline_eval } true;havoc eval_#t~nondet4#1, eval_#t~nondet5#1, eval_#t~nondet6#1, eval_#t~nondet7#1, eval_#t~nondet8#1, eval_~tmp~0#1, eval_~tmp___0~0#1, eval_~tmp___1~0#1, eval_~tmp___2~0#1, eval_~tmp___3~0#1;havoc eval_~tmp~0#1;havoc eval_~tmp___0~0#1;havoc eval_~tmp___1~0#1;havoc eval_~tmp___2~0#1;havoc eval_~tmp___3~0#1;" "assume false;" "havoc eval_#t~nondet4#1, eval_#t~nondet5#1, eval_#t~nondet6#1, eval_#t~nondet7#1, eval_#t~nondet8#1, eval_~tmp~0#1, eval_~tmp___0~0#1, eval_~tmp___1~0#1, eval_~tmp___2~0#1, eval_~tmp___3~0#1;assume { :end_inline_eval } true;start_simulation_~kernel_st~0#1 := 2;" "assume !(1 == ~main_in1_req_up~0);" "assume !(1 == ~main_in2_req_up~0);" "assume !(1 == ~main_sum_req_up~0);" "assume !(1 == ~main_diff_req_up~0);" "assume !(1 == ~main_pres_req_up~0);" "assume !(1 == ~main_dbl_req_up~0);" "assume !(1 == ~main_zero_req_up~0);" "assume !(1 == ~main_clk_req_up~0);" "start_simulation_~kernel_st~0#1 := 3;" "assume !(0 == ~main_in1_ev~0);" "assume 0 == ~main_in2_ev~0;~main_in2_ev~0 := 1;" "assume 0 == ~main_sum_ev~0;~main_sum_ev~0 := 1;" "assume 0 == ~main_diff_ev~0;~main_diff_ev~0 := 1;" "assume 0 == ~main_pres_ev~0;~main_pres_ev~0 := 1;" "assume 0 == ~main_dbl_ev~0;~main_dbl_ev~0 := 1;" "assume 0 == ~main_zero_ev~0;~main_zero_ev~0 := 1;" "assume 0 == ~main_clk_ev~0;~main_clk_ev~0 := 1;" "assume !(0 == ~main_clk_pos_edge~0);" "assume 0 == ~main_clk_neg_edge~0;~main_clk_neg_edge~0 := 1;" "assume 1 == ~main_clk_pos_edge~0;~N_generate_st~0 := 0;" "assume 1 == ~main_clk_pos_edge~0;~S1_addsub_st~0 := 0;" "assume 1 == ~main_clk_pos_edge~0;~S2_presdbl_st~0 := 0;" "assume 1 == ~main_clk_pos_edge~0;~S3_zero_st~0 := 0;" "assume 1 == ~main_clk_pos_edge~0;~D_print_st~0 := 0;" "assume 1 == ~main_in1_ev~0;~main_in1_ev~0 := 2;" "assume !(1 == ~main_in2_ev~0);" "assume 1 == ~main_sum_ev~0;~main_sum_ev~0 := 2;" "assume 1 == ~main_diff_ev~0;~main_diff_ev~0 := 2;" "assume 1 == ~main_pres_ev~0;~main_pres_ev~0 := 2;" "assume 1 == ~main_dbl_ev~0;~main_dbl_ev~0 := 2;" "assume 1 == ~main_zero_ev~0;~main_zero_ev~0 := 2;" "assume 1 == ~main_clk_ev~0;~main_clk_ev~0 := 2;" "assume 1 == ~main_clk_pos_edge~0;~main_clk_pos_edge~0 := 2;" "assume !(1 == ~main_clk_neg_edge~0);" "assume 0 == ~N_generate_st~0;" [2024-11-12 21:44:44,914 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 21:44:44,914 INFO L85 PathProgramCache]: Analyzing trace with hash 1291793407, now seen corresponding path program 1 times [2024-11-12 21:44:44,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 21:44:44,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600066533] [2024-11-12 21:44:44,924 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 21:44:44,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 21:44:45,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 21:44:45,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 21:44:45,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600066533] [2024-11-12 21:44:45,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600066533] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 21:44:45,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672445788] [2024-11-12 21:44:45,377 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 21:44:45,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 21:44:45,378 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 21:44:45,380 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 21:44:45,382 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-12 21:44:45,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 21:44:45,504 INFO L256 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-12 21:44:45,510 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 21:44:45,592 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 21:44:45,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1672445788] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 21:44:45,655 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 21:44:45,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 6 [2024-11-12 21:44:45,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932455723] [2024-11-12 21:44:45,659 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 21:44:45,664 INFO L752 eck$LassoCheckResult]: stem already infeasible [2024-11-12 21:44:45,665 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 21:44:45,665 INFO L85 PathProgramCache]: Analyzing trace with hash -727719859, now seen corresponding path program 1 times [2024-11-12 21:44:45,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 21:44:45,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410777548] [2024-11-12 21:44:45,666 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 21:44:45,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 21:44:45,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 21:44:45,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 21:44:45,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410777548] [2024-11-12 21:44:45,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410777548] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 21:44:45,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338705324] [2024-11-12 21:44:45,698 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 21:44:45,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 21:44:45,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 21:44:45,720 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 21:44:45,724 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-12 21:44:45,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 21:44:45,787 INFO L256 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 1 conjuncts are in the unsatisfiable core [2024-11-12 21:44:45,788 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 21:44:45,791 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 21:44:45,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338705324] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 21:44:45,795 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 21:44:45,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 2 [2024-11-12 21:44:45,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993398998] [2024-11-12 21:44:45,796 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 21:44:45,797 INFO L764 eck$LassoCheckResult]: loop already infeasible [2024-11-12 21:44:45,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 21:44:45,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-12 21:44:45,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-12 21:44:45,831 INFO L87 Difference]: Start difference. First operand has 423 states, 422 states have (on average 1.8127962085308056) internal successors, (765), 422 states have internal predecessors, (765), 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) Second operand has 2 states, 2 states have (on average 19.5) internal successors, (39), 2 states have internal predecessors, (39), 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) [2024-11-12 21:44:45,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-12 21:44:45,875 INFO L93 Difference]: Finished difference Result 417 states and 745 transitions. [2024-11-12 21:44:45,877 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 417 states and 745 transitions. [2024-11-12 21:44:45,884 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 358 [2024-11-12 21:44:45,894 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 417 states to 416 states and 744 transitions. [2024-11-12 21:44:45,896 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 416 [2024-11-12 21:44:45,898 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 416 [2024-11-12 21:44:45,899 INFO L73 IsDeterministic]: Start isDeterministic. Operand 416 states and 744 transitions. [2024-11-12 21:44:45,902 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2024-11-12 21:44:45,903 INFO L218 hiAutomatonCegarLoop]: Abstraction has 416 states and 744 transitions. [2024-11-12 21:44:45,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states and 744 transitions. [2024-11-12 21:44:45,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 416. [2024-11-12 21:44:45,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 416 states, 416 states have (on average 1.7884615384615385) internal successors, (744), 415 states have internal predecessors, (744), 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) [2024-11-12 21:44:45,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 744 transitions. [2024-11-12 21:44:45,947 INFO L240 hiAutomatonCegarLoop]: Abstraction has 416 states and 744 transitions. [2024-11-12 21:44:45,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-12 21:44:45,952 INFO L426 stractBuchiCegarLoop]: Abstraction has 416 states and 744 transitions. [2024-11-12 21:44:45,953 INFO L333 stractBuchiCegarLoop]: ======== Iteration 2 ============ [2024-11-12 21:44:45,953 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 416 states and 744 transitions. [2024-11-12 21:44:45,956 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 358 [2024-11-12 21:44:45,957 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2024-11-12 21:44:45,957 INFO L119 BuchiIsEmpty]: Starting construction of run [2024-11-12 21:44:45,958 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 21:44:45,959 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 21:44:45,959 INFO L747 eck$LassoCheckResult]: Stem: "assume { :begin_inline_ULTIMATE.init } true;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int#0(48, 1, 0, 1);call write~init~int#0(0, 1, 1, 1);call #Ultimate.allocInit(17, 2);call #Ultimate.allocInit(12, 3);~main_in1_val~0 := 0;~main_in1_val_t~0 := 0;~main_in1_ev~0 := 0;~main_in1_req_up~0 := 0;~main_in2_val~0 := 0;~main_in2_val_t~0 := 0;~main_in2_ev~0 := 0;~main_in2_req_up~0 := 0;~main_diff_val~0 := 0;~main_diff_val_t~0 := 0;~main_diff_ev~0 := 0;~main_diff_req_up~0 := 0;~main_sum_val~0 := 0;~main_sum_val_t~0 := 0;~main_sum_ev~0 := 0;~main_sum_req_up~0 := 0;~main_pres_val~0 := 0;~main_pres_val_t~0 := 0;~main_pres_ev~0 := 0;~main_pres_req_up~0 := 0;~main_dbl_val~0 := 0;~main_dbl_val_t~0 := 0;~main_dbl_ev~0 := 0;~main_dbl_req_up~0 := 0;~main_zero_val~0 := 0;~main_zero_val_t~0 := 0;~main_zero_ev~0 := 0;~main_zero_req_up~0 := 0;~main_clk_val~0 := 0;~main_clk_val_t~0 := 0;~main_clk_ev~0 := 0;~main_clk_req_up~0 := 0;~main_clk_pos_edge~0 := 0;~main_clk_neg_edge~0 := 0;~N_generate_st~0 := 0;~N_generate_i~0 := 0;~S1_addsub_st~0 := 0;~S1_addsub_i~0 := 0;~S2_presdbl_st~0 := 0;~S2_presdbl_i~0 := 0;~S3_zero_st~0 := 0;~S3_zero_i~0 := 0;~D_z~0 := 0;~D_print_st~0 := 0;~D_print_i~0 := 0;" "assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_~count~0#1, main_~__retres2~0#1;havoc main_~count~0#1;havoc main_~__retres2~0#1;~main_in1_ev~0 := 2;~main_in1_req_up~0 := 0;~main_in2_ev~0 := 2;~main_in2_req_up~0 := 0;~main_diff_ev~0 := 2;~main_diff_req_up~0 := 0;~main_sum_ev~0 := 2;~main_sum_req_up~0 := 0;~main_pres_ev~0 := 2;~main_pres_req_up~0 := 0;~main_dbl_ev~0 := 2;~main_dbl_req_up~0 := 0;~main_zero_ev~0 := 2;~main_zero_req_up~0 := 0;~main_clk_val~0 := 0;~main_clk_ev~0 := 2;~main_clk_req_up~0 := 0;~main_clk_pos_edge~0 := 2;~main_clk_neg_edge~0 := 2;main_~count~0#1 := 0;~N_generate_i~0 := 0;~S1_addsub_i~0 := 0;~S2_presdbl_i~0 := 0;~S3_zero_i~0 := 0;~D_print_i~0 := 0;assume { :begin_inline_start_simulation } true;havoc start_simulation_~kernel_st~0#1;havoc start_simulation_~kernel_st~0#1;start_simulation_~kernel_st~0#1 := 0;" "assume !(1 == ~main_in1_req_up~0);" "assume !(1 == ~main_in2_req_up~0);" "assume !(1 == ~main_sum_req_up~0);" "assume !(1 == ~main_diff_req_up~0);" "assume !(1 == ~main_pres_req_up~0);" "assume !(1 == ~main_dbl_req_up~0);" "assume !(1 == ~main_zero_req_up~0);" "assume !(1 == ~main_clk_req_up~0);" "assume !(1 == ~N_generate_i~0);~N_generate_st~0 := 2;" "assume !(1 == ~S1_addsub_i~0);~S1_addsub_st~0 := 2;" "assume 1 == ~S2_presdbl_i~0;~S2_presdbl_st~0 := 0;" "assume !(1 == ~S3_zero_i~0);~S3_zero_st~0 := 2;" "assume !(1 == ~D_print_i~0);~D_print_st~0 := 2;" "assume !(0 == ~main_in1_ev~0);" "assume !(0 == ~main_in2_ev~0);" "assume !(0 == ~main_sum_ev~0);" "assume !(0 == ~main_diff_ev~0);" "assume !(0 == ~main_pres_ev~0);" "assume 0 == ~main_dbl_ev~0;~main_dbl_ev~0 := 1;" "assume !(0 == ~main_zero_ev~0);" "assume !(0 == ~main_clk_ev~0);" "assume !(0 == ~main_clk_pos_edge~0);" "assume !(0 == ~main_clk_neg_edge~0);" "assume !(1 == ~main_clk_pos_edge~0);" "assume !(1 == ~main_clk_pos_edge~0);" "assume !(1 == ~main_clk_pos_edge~0);" "assume 1 == ~main_clk_pos_edge~0;~S3_zero_st~0 := 0;" "assume !(1 == ~main_clk_pos_edge~0);" "assume !(1 == ~main_in1_ev~0);" "assume !(1 == ~main_in2_ev~0);" "assume !(1 == ~main_sum_ev~0);" "assume !(1 == ~main_diff_ev~0);" "assume !(1 == ~main_pres_ev~0);" "assume !(1 == ~main_dbl_ev~0);" "assume 1 == ~main_zero_ev~0;~main_zero_ev~0 := 2;" "assume !(1 == ~main_clk_ev~0);" "assume !(1 == ~main_clk_pos_edge~0);" "assume !(1 == ~main_clk_neg_edge~0);" [2024-11-12 21:44:45,959 INFO L749 eck$LassoCheckResult]: Loop: "assume !false;" "start_simulation_~kernel_st~0#1 := 1;assume { :begin_inline_eval } true;havoc eval_#t~nondet4#1, eval_#t~nondet5#1, eval_#t~nondet6#1, eval_#t~nondet7#1, eval_#t~nondet8#1, eval_~tmp~0#1, eval_~tmp___0~0#1, eval_~tmp___1~0#1, eval_~tmp___2~0#1, eval_~tmp___3~0#1;havoc eval_~tmp~0#1;havoc eval_~tmp___0~0#1;havoc eval_~tmp___1~0#1;havoc eval_~tmp___2~0#1;havoc eval_~tmp___3~0#1;" "assume !false;" "assume !(0 == ~N_generate_st~0);" "assume !(0 == ~S1_addsub_st~0);" "assume !(0 == ~S2_presdbl_st~0);" "assume !(0 == ~S3_zero_st~0);" "assume !(0 == ~D_print_st~0);" "havoc eval_#t~nondet4#1, eval_#t~nondet5#1, eval_#t~nondet6#1, eval_#t~nondet7#1, eval_#t~nondet8#1, eval_~tmp~0#1, eval_~tmp___0~0#1, eval_~tmp___1~0#1, eval_~tmp___2~0#1, eval_~tmp___3~0#1;assume { :end_inline_eval } true;start_simulation_~kernel_st~0#1 := 2;" "assume !(1 == ~main_in1_req_up~0);" "assume !(1 == ~main_in2_req_up~0);" "assume !(1 == ~main_sum_req_up~0);" "assume !(1 == ~main_diff_req_up~0);" "assume !(1 == ~main_pres_req_up~0);" "assume !(1 == ~main_dbl_req_up~0);" "assume !(1 == ~main_zero_req_up~0);" "assume !(1 == ~main_clk_req_up~0);" "start_simulation_~kernel_st~0#1 := 3;" "assume !(0 == ~main_in1_ev~0);" "assume 0 == ~main_in2_ev~0;~main_in2_ev~0 := 1;" "assume 0 == ~main_sum_ev~0;~main_sum_ev~0 := 1;" "assume 0 == ~main_diff_ev~0;~main_diff_ev~0 := 1;" "assume 0 == ~main_pres_ev~0;~main_pres_ev~0 := 1;" "assume 0 == ~main_dbl_ev~0;~main_dbl_ev~0 := 1;" "assume 0 == ~main_zero_ev~0;~main_zero_ev~0 := 1;" "assume 0 == ~main_clk_ev~0;~main_clk_ev~0 := 1;" "assume !(0 == ~main_clk_pos_edge~0);" "assume 0 == ~main_clk_neg_edge~0;~main_clk_neg_edge~0 := 1;" "assume 1 == ~main_clk_pos_edge~0;~N_generate_st~0 := 0;" "assume 1 == ~main_clk_pos_edge~0;~S1_addsub_st~0 := 0;" "assume 1 == ~main_clk_pos_edge~0;~S2_presdbl_st~0 := 0;" "assume 1 == ~main_clk_pos_edge~0;~S3_zero_st~0 := 0;" "assume 1 == ~main_clk_pos_edge~0;~D_print_st~0 := 0;" "assume 1 == ~main_in1_ev~0;~main_in1_ev~0 := 2;" "assume !(1 == ~main_in2_ev~0);" "assume 1 == ~main_sum_ev~0;~main_sum_ev~0 := 2;" "assume 1 == ~main_diff_ev~0;~main_diff_ev~0 := 2;" "assume 1 == ~main_pres_ev~0;~main_pres_ev~0 := 2;" "assume 1 == ~main_dbl_ev~0;~main_dbl_ev~0 := 2;" "assume 1 == ~main_zero_ev~0;~main_zero_ev~0 := 2;" "assume 1 == ~main_clk_ev~0;~main_clk_ev~0 := 2;" "assume 1 == ~main_clk_pos_edge~0;~main_clk_pos_edge~0 := 2;" "assume !(1 == ~main_clk_neg_edge~0);" "assume 0 == ~N_generate_st~0;" [2024-11-12 21:44:45,960 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 21:44:45,960 INFO L85 PathProgramCache]: Analyzing trace with hash 1291793407, now seen corresponding path program 2 times [2024-11-12 21:44:45,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 21:44:45,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618908870] [2024-11-12 21:44:45,961 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 21:44:45,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 21:44:45,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 21:44:46,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 21:44:46,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618908870] [2024-11-12 21:44:46,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618908870] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 21:44:46,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772858467] [2024-11-12 21:44:46,092 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-12 21:44:46,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 21:44:46,092 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 21:44:46,096 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 21:44:46,098 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-12 21:44:46,164 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-12 21:44:46,165 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-12 21:44:46,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2024-11-12 21:44:46,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208583003] [2024-11-12 21:44:46,165 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-12 21:44:46,165 INFO L752 eck$LassoCheckResult]: stem already infeasible [2024-11-12 21:44:46,166 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 21:44:46,166 INFO L85 PathProgramCache]: Analyzing trace with hash 1802774254, now seen corresponding path program 1 times [2024-11-12 21:44:46,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 21:44:46,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224091642] [2024-11-12 21:44:46,166 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 21:44:46,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 21:44:46,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 21:44:46,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 21:44:46,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224091642] [2024-11-12 21:44:46,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224091642] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 21:44:46,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72207209] [2024-11-12 21:44:46,217 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 21:44:46,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 21:44:46,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 21:44:46,221 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 21:44:46,223 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-12 21:44:46,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 21:44:46,291 INFO L256 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-12 21:44:46,293 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 21:44:46,333 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 21:44:46,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [72207209] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 21:44:46,374 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 21:44:46,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 3 [2024-11-12 21:44:46,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909063535] [2024-11-12 21:44:46,374 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 21:44:46,375 INFO L764 eck$LassoCheckResult]: loop already infeasible [2024-11-12 21:44:46,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 21:44:46,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-12 21:44:46,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-12 21:44:46,376 INFO L87 Difference]: Start difference. First operand 416 states and 744 transitions. cyclomatic complexity: 330 Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 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) [2024-11-12 21:44:46,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-12 21:44:46,482 INFO L93 Difference]: Finished difference Result 760 states and 1352 transitions. [2024-11-12 21:44:46,482 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 760 states and 1352 transitions. [2024-11-12 21:44:46,488 INFO L131 ngComponentsAnalysis]: Automaton has 4 accepting balls. 703 [2024-11-12 21:44:46,493 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 760 states to 760 states and 1352 transitions. [2024-11-12 21:44:46,493 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 760 [2024-11-12 21:44:46,494 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 760 [2024-11-12 21:44:46,495 INFO L73 IsDeterministic]: Start isDeterministic. Operand 760 states and 1352 transitions. [2024-11-12 21:44:46,501 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2024-11-12 21:44:46,502 INFO L218 hiAutomatonCegarLoop]: Abstraction has 760 states and 1352 transitions. [2024-11-12 21:44:46,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 760 states and 1352 transitions. [2024-11-12 21:44:46,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 760 to 760. [2024-11-12 21:44:46,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 760 states, 760 states have (on average 1.7789473684210526) internal successors, (1352), 759 states have internal predecessors, (1352), 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) [2024-11-12 21:44:46,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 760 states to 760 states and 1352 transitions. [2024-11-12 21:44:46,529 INFO L240 hiAutomatonCegarLoop]: Abstraction has 760 states and 1352 transitions. [2024-11-12 21:44:46,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-12 21:44:46,530 INFO L426 stractBuchiCegarLoop]: Abstraction has 760 states and 1352 transitions. [2024-11-12 21:44:46,531 INFO L333 stractBuchiCegarLoop]: ======== Iteration 3 ============ [2024-11-12 21:44:46,531 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 760 states and 1352 transitions. [2024-11-12 21:44:46,535 INFO L131 ngComponentsAnalysis]: Automaton has 4 accepting balls. 703 [2024-11-12 21:44:46,535 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2024-11-12 21:44:46,535 INFO L119 BuchiIsEmpty]: Starting construction of run [2024-11-12 21:44:46,536 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 21:44:46,537 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 21:44:46,537 INFO L747 eck$LassoCheckResult]: Stem: "assume { :begin_inline_ULTIMATE.init } true;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int#0(48, 1, 0, 1);call write~init~int#0(0, 1, 1, 1);call #Ultimate.allocInit(17, 2);call #Ultimate.allocInit(12, 3);~main_in1_val~0 := 0;~main_in1_val_t~0 := 0;~main_in1_ev~0 := 0;~main_in1_req_up~0 := 0;~main_in2_val~0 := 0;~main_in2_val_t~0 := 0;~main_in2_ev~0 := 0;~main_in2_req_up~0 := 0;~main_diff_val~0 := 0;~main_diff_val_t~0 := 0;~main_diff_ev~0 := 0;~main_diff_req_up~0 := 0;~main_sum_val~0 := 0;~main_sum_val_t~0 := 0;~main_sum_ev~0 := 0;~main_sum_req_up~0 := 0;~main_pres_val~0 := 0;~main_pres_val_t~0 := 0;~main_pres_ev~0 := 0;~main_pres_req_up~0 := 0;~main_dbl_val~0 := 0;~main_dbl_val_t~0 := 0;~main_dbl_ev~0 := 0;~main_dbl_req_up~0 := 0;~main_zero_val~0 := 0;~main_zero_val_t~0 := 0;~main_zero_ev~0 := 0;~main_zero_req_up~0 := 0;~main_clk_val~0 := 0;~main_clk_val_t~0 := 0;~main_clk_ev~0 := 0;~main_clk_req_up~0 := 0;~main_clk_pos_edge~0 := 0;~main_clk_neg_edge~0 := 0;~N_generate_st~0 := 0;~N_generate_i~0 := 0;~S1_addsub_st~0 := 0;~S1_addsub_i~0 := 0;~S2_presdbl_st~0 := 0;~S2_presdbl_i~0 := 0;~S3_zero_st~0 := 0;~S3_zero_i~0 := 0;~D_z~0 := 0;~D_print_st~0 := 0;~D_print_i~0 := 0;" "assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_~count~0#1, main_~__retres2~0#1;havoc main_~count~0#1;havoc main_~__retres2~0#1;~main_in1_ev~0 := 2;~main_in1_req_up~0 := 0;~main_in2_ev~0 := 2;~main_in2_req_up~0 := 0;~main_diff_ev~0 := 2;~main_diff_req_up~0 := 0;~main_sum_ev~0 := 2;~main_sum_req_up~0 := 0;~main_pres_ev~0 := 2;~main_pres_req_up~0 := 0;~main_dbl_ev~0 := 2;~main_dbl_req_up~0 := 0;~main_zero_ev~0 := 2;~main_zero_req_up~0 := 0;~main_clk_val~0 := 0;~main_clk_ev~0 := 2;~main_clk_req_up~0 := 0;~main_clk_pos_edge~0 := 2;~main_clk_neg_edge~0 := 2;main_~count~0#1 := 0;~N_generate_i~0 := 0;~S1_addsub_i~0 := 0;~S2_presdbl_i~0 := 0;~S3_zero_i~0 := 0;~D_print_i~0 := 0;assume { :begin_inline_start_simulation } true;havoc start_simulation_~kernel_st~0#1;havoc start_simulation_~kernel_st~0#1;start_simulation_~kernel_st~0#1 := 0;" "assume !(1 == ~main_in1_req_up~0);" "assume !(1 == ~main_in2_req_up~0);" "assume !(1 == ~main_sum_req_up~0);" "assume !(1 == ~main_diff_req_up~0);" "assume !(1 == ~main_pres_req_up~0);" "assume !(1 == ~main_dbl_req_up~0);" "assume !(1 == ~main_zero_req_up~0);" "assume !(1 == ~main_clk_req_up~0);" "assume !(1 == ~N_generate_i~0);~N_generate_st~0 := 2;" "assume !(1 == ~S1_addsub_i~0);~S1_addsub_st~0 := 2;" "assume !(1 == ~S2_presdbl_i~0);~S2_presdbl_st~0 := 2;" "assume !(1 == ~S3_zero_i~0);~S3_zero_st~0 := 2;" "assume !(1 == ~D_print_i~0);~D_print_st~0 := 2;" "assume !(0 == ~main_in1_ev~0);" "assume !(0 == ~main_in2_ev~0);" "assume !(0 == ~main_sum_ev~0);" "assume !(0 == ~main_diff_ev~0);" "assume !(0 == ~main_pres_ev~0);" "assume 0 == ~main_dbl_ev~0;~main_dbl_ev~0 := 1;" "assume !(0 == ~main_zero_ev~0);" "assume !(0 == ~main_clk_ev~0);" "assume !(0 == ~main_clk_pos_edge~0);" "assume !(0 == ~main_clk_neg_edge~0);" "assume !(1 == ~main_clk_pos_edge~0);" "assume !(1 == ~main_clk_pos_edge~0);" "assume !(1 == ~main_clk_pos_edge~0);" "assume 1 == ~main_clk_pos_edge~0;~S3_zero_st~0 := 0;" "assume !(1 == ~main_clk_pos_edge~0);" "assume !(1 == ~main_in1_ev~0);" "assume !(1 == ~main_in2_ev~0);" "assume !(1 == ~main_sum_ev~0);" "assume !(1 == ~main_diff_ev~0);" "assume !(1 == ~main_pres_ev~0);" "assume !(1 == ~main_dbl_ev~0);" "assume 1 == ~main_zero_ev~0;~main_zero_ev~0 := 2;" "assume !(1 == ~main_clk_ev~0);" "assume !(1 == ~main_clk_pos_edge~0);" "assume !(1 == ~main_clk_neg_edge~0);" [2024-11-12 21:44:46,537 INFO L749 eck$LassoCheckResult]: Loop: "assume !false;" "start_simulation_~kernel_st~0#1 := 1;assume { :begin_inline_eval } true;havoc eval_#t~nondet4#1, eval_#t~nondet5#1, eval_#t~nondet6#1, eval_#t~nondet7#1, eval_#t~nondet8#1, eval_~tmp~0#1, eval_~tmp___0~0#1, eval_~tmp___1~0#1, eval_~tmp___2~0#1, eval_~tmp___3~0#1;havoc eval_~tmp~0#1;havoc eval_~tmp___0~0#1;havoc eval_~tmp___1~0#1;havoc eval_~tmp___2~0#1;havoc eval_~tmp___3~0#1;" "assume !false;" "assume !(0 == ~N_generate_st~0);" "assume !(0 == ~S1_addsub_st~0);" "assume !(0 == ~S2_presdbl_st~0);" "assume !(0 == ~S3_zero_st~0);" "assume !(0 == ~D_print_st~0);" "havoc eval_#t~nondet4#1, eval_#t~nondet5#1, eval_#t~nondet6#1, eval_#t~nondet7#1, eval_#t~nondet8#1, eval_~tmp~0#1, eval_~tmp___0~0#1, eval_~tmp___1~0#1, eval_~tmp___2~0#1, eval_~tmp___3~0#1;assume { :end_inline_eval } true;start_simulation_~kernel_st~0#1 := 2;" "assume !(1 == ~main_in1_req_up~0);" "assume !(1 == ~main_in2_req_up~0);" "assume !(1 == ~main_sum_req_up~0);" "assume !(1 == ~main_diff_req_up~0);" "assume !(1 == ~main_pres_req_up~0);" "assume !(1 == ~main_dbl_req_up~0);" "assume !(1 == ~main_zero_req_up~0);" "assume !(1 == ~main_clk_req_up~0);" "start_simulation_~kernel_st~0#1 := 3;" "assume !(0 == ~main_in1_ev~0);" "assume 0 == ~main_in2_ev~0;~main_in2_ev~0 := 1;" "assume 0 == ~main_sum_ev~0;~main_sum_ev~0 := 1;" "assume 0 == ~main_diff_ev~0;~main_diff_ev~0 := 1;" "assume 0 == ~main_pres_ev~0;~main_pres_ev~0 := 1;" "assume 0 == ~main_dbl_ev~0;~main_dbl_ev~0 := 1;" "assume 0 == ~main_zero_ev~0;~main_zero_ev~0 := 1;" "assume 0 == ~main_clk_ev~0;~main_clk_ev~0 := 1;" "assume !(0 == ~main_clk_pos_edge~0);" "assume 0 == ~main_clk_neg_edge~0;~main_clk_neg_edge~0 := 1;" "assume 1 == ~main_clk_pos_edge~0;~N_generate_st~0 := 0;" "assume 1 == ~main_clk_pos_edge~0;~S1_addsub_st~0 := 0;" "assume 1 == ~main_clk_pos_edge~0;~S2_presdbl_st~0 := 0;" "assume 1 == ~main_clk_pos_edge~0;~S3_zero_st~0 := 0;" "assume 1 == ~main_clk_pos_edge~0;~D_print_st~0 := 0;" "assume 1 == ~main_in1_ev~0;~main_in1_ev~0 := 2;" "assume !(1 == ~main_in2_ev~0);" "assume 1 == ~main_sum_ev~0;~main_sum_ev~0 := 2;" "assume 1 == ~main_diff_ev~0;~main_diff_ev~0 := 2;" "assume 1 == ~main_pres_ev~0;~main_pres_ev~0 := 2;" "assume 1 == ~main_dbl_ev~0;~main_dbl_ev~0 := 2;" "assume 1 == ~main_zero_ev~0;~main_zero_ev~0 := 2;" "assume 1 == ~main_clk_ev~0;~main_clk_ev~0 := 2;" "assume 1 == ~main_clk_pos_edge~0;~main_clk_pos_edge~0 := 2;" "assume !(1 == ~main_clk_neg_edge~0);" "assume 0 == ~N_generate_st~0;" [2024-11-12 21:44:46,538 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 21:44:46,538 INFO L85 PathProgramCache]: Analyzing trace with hash 782320317, now seen corresponding path program 1 times [2024-11-12 21:44:46,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 21:44:46,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780881972] [2024-11-12 21:44:46,539 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 21:44:46,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 21:44:46,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 21:44:46,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 21:44:46,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780881972] [2024-11-12 21:44:46,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780881972] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 21:44:46,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955059663] [2024-11-12 21:44:46,653 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 21:44:46,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 21:44:46,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 21:44:46,656 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 21:44:46,658 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-12 21:44:46,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 21:44:46,762 INFO L256 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-12 21:44:46,763 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 21:44:46,802 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 21:44:46,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1955059663] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 21:44:46,854 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 21:44:46,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 6 [2024-11-12 21:44:46,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263597381] [2024-11-12 21:44:46,855 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 21:44:46,855 INFO L752 eck$LassoCheckResult]: stem already infeasible [2024-11-12 21:44:46,856 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 21:44:46,856 INFO L85 PathProgramCache]: Analyzing trace with hash 1802774254, now seen corresponding path program 2 times [2024-11-12 21:44:46,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 21:44:46,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897121294] [2024-11-12 21:44:46,856 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 21:44:46,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 21:44:46,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 21:44:46,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 21:44:46,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897121294] [2024-11-12 21:44:46,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897121294] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 21:44:46,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368344111] [2024-11-12 21:44:46,889 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-12 21:44:46,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 21:44:46,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 21:44:46,891 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 21:44:46,893 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-12 21:44:46,942 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-12 21:44:46,942 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-12 21:44:46,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3] total 3 [2024-11-12 21:44:46,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293148109] [2024-11-12 21:44:46,942 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-12 21:44:46,942 INFO L764 eck$LassoCheckResult]: loop already infeasible [2024-11-12 21:44:46,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 21:44:46,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-12 21:44:46,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-11-12 21:44:46,943 INFO L87 Difference]: Start difference. First operand 760 states and 1352 transitions. cyclomatic complexity: 596 Second operand has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 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) [2024-11-12 21:44:47,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-12 21:44:47,236 INFO L93 Difference]: Finished difference Result 2543 states and 4486 transitions. [2024-11-12 21:44:47,236 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 2543 states and 4486 transitions. [2024-11-12 21:44:47,256 INFO L131 ngComponentsAnalysis]: Automaton has 8 accepting balls. 2425 [2024-11-12 21:44:47,275 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 2543 states to 2543 states and 4486 transitions. [2024-11-12 21:44:47,275 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 2543 [2024-11-12 21:44:47,279 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 2543 [2024-11-12 21:44:47,279 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2543 states and 4486 transitions. [2024-11-12 21:44:47,283 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2024-11-12 21:44:47,283 INFO L218 hiAutomatonCegarLoop]: Abstraction has 2543 states and 4486 transitions. [2024-11-12 21:44:47,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2543 states and 4486 transitions. [2024-11-12 21:44:47,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2543 to 2543. [2024-11-12 21:44:47,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2543 states, 2543 states have (on average 1.7640581989775854) internal successors, (4486), 2542 states have internal predecessors, (4486), 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) [2024-11-12 21:44:47,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2543 states to 2543 states and 4486 transitions. [2024-11-12 21:44:47,341 INFO L240 hiAutomatonCegarLoop]: Abstraction has 2543 states and 4486 transitions. [2024-11-12 21:44:47,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-12 21:44:47,342 INFO L426 stractBuchiCegarLoop]: Abstraction has 2543 states and 4486 transitions. [2024-11-12 21:44:47,343 INFO L333 stractBuchiCegarLoop]: ======== Iteration 4 ============ [2024-11-12 21:44:47,343 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 2543 states and 4486 transitions. [2024-11-12 21:44:47,358 INFO L131 ngComponentsAnalysis]: Automaton has 8 accepting balls. 2425 [2024-11-12 21:44:47,359 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2024-11-12 21:44:47,359 INFO L119 BuchiIsEmpty]: Starting construction of run [2024-11-12 21:44:47,360 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 21:44:47,360 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 21:44:47,360 INFO L747 eck$LassoCheckResult]: Stem: "assume { :begin_inline_ULTIMATE.init } true;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int#0(48, 1, 0, 1);call write~init~int#0(0, 1, 1, 1);call #Ultimate.allocInit(17, 2);call #Ultimate.allocInit(12, 3);~main_in1_val~0 := 0;~main_in1_val_t~0 := 0;~main_in1_ev~0 := 0;~main_in1_req_up~0 := 0;~main_in2_val~0 := 0;~main_in2_val_t~0 := 0;~main_in2_ev~0 := 0;~main_in2_req_up~0 := 0;~main_diff_val~0 := 0;~main_diff_val_t~0 := 0;~main_diff_ev~0 := 0;~main_diff_req_up~0 := 0;~main_sum_val~0 := 0;~main_sum_val_t~0 := 0;~main_sum_ev~0 := 0;~main_sum_req_up~0 := 0;~main_pres_val~0 := 0;~main_pres_val_t~0 := 0;~main_pres_ev~0 := 0;~main_pres_req_up~0 := 0;~main_dbl_val~0 := 0;~main_dbl_val_t~0 := 0;~main_dbl_ev~0 := 0;~main_dbl_req_up~0 := 0;~main_zero_val~0 := 0;~main_zero_val_t~0 := 0;~main_zero_ev~0 := 0;~main_zero_req_up~0 := 0;~main_clk_val~0 := 0;~main_clk_val_t~0 := 0;~main_clk_ev~0 := 0;~main_clk_req_up~0 := 0;~main_clk_pos_edge~0 := 0;~main_clk_neg_edge~0 := 0;~N_generate_st~0 := 0;~N_generate_i~0 := 0;~S1_addsub_st~0 := 0;~S1_addsub_i~0 := 0;~S2_presdbl_st~0 := 0;~S2_presdbl_i~0 := 0;~S3_zero_st~0 := 0;~S3_zero_i~0 := 0;~D_z~0 := 0;~D_print_st~0 := 0;~D_print_i~0 := 0;" "assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_~count~0#1, main_~__retres2~0#1;havoc main_~count~0#1;havoc main_~__retres2~0#1;~main_in1_ev~0 := 2;~main_in1_req_up~0 := 0;~main_in2_ev~0 := 2;~main_in2_req_up~0 := 0;~main_diff_ev~0 := 2;~main_diff_req_up~0 := 0;~main_sum_ev~0 := 2;~main_sum_req_up~0 := 0;~main_pres_ev~0 := 2;~main_pres_req_up~0 := 0;~main_dbl_ev~0 := 2;~main_dbl_req_up~0 := 0;~main_zero_ev~0 := 2;~main_zero_req_up~0 := 0;~main_clk_val~0 := 0;~main_clk_ev~0 := 2;~main_clk_req_up~0 := 0;~main_clk_pos_edge~0 := 2;~main_clk_neg_edge~0 := 2;main_~count~0#1 := 0;~N_generate_i~0 := 0;~S1_addsub_i~0 := 0;~S2_presdbl_i~0 := 0;~S3_zero_i~0 := 0;~D_print_i~0 := 0;assume { :begin_inline_start_simulation } true;havoc start_simulation_~kernel_st~0#1;havoc start_simulation_~kernel_st~0#1;start_simulation_~kernel_st~0#1 := 0;" "assume !(1 == ~main_in1_req_up~0);" "assume !(1 == ~main_in2_req_up~0);" "assume !(1 == ~main_sum_req_up~0);" "assume !(1 == ~main_diff_req_up~0);" "assume !(1 == ~main_pres_req_up~0);" "assume !(1 == ~main_dbl_req_up~0);" "assume !(1 == ~main_zero_req_up~0);" "assume !(1 == ~main_clk_req_up~0);" "assume !(1 == ~N_generate_i~0);~N_generate_st~0 := 2;" "assume !(1 == ~S1_addsub_i~0);~S1_addsub_st~0 := 2;" "assume !(1 == ~S2_presdbl_i~0);~S2_presdbl_st~0 := 2;" "assume !(1 == ~S3_zero_i~0);~S3_zero_st~0 := 2;" "assume !(1 == ~D_print_i~0);~D_print_st~0 := 2;" "assume !(0 == ~main_in1_ev~0);" "assume !(0 == ~main_in2_ev~0);" "assume !(0 == ~main_sum_ev~0);" "assume !(0 == ~main_diff_ev~0);" "assume !(0 == ~main_pres_ev~0);" "assume !(0 == ~main_dbl_ev~0);" "assume !(0 == ~main_zero_ev~0);" "assume !(0 == ~main_clk_ev~0);" "assume !(0 == ~main_clk_pos_edge~0);" "assume !(0 == ~main_clk_neg_edge~0);" "assume !(1 == ~main_clk_pos_edge~0);" "assume !(1 == ~main_clk_pos_edge~0);" "assume !(1 == ~main_clk_pos_edge~0);" "assume 1 == ~main_clk_pos_edge~0;~S3_zero_st~0 := 0;" "assume !(1 == ~main_clk_pos_edge~0);" "assume !(1 == ~main_in1_ev~0);" "assume !(1 == ~main_in2_ev~0);" "assume !(1 == ~main_sum_ev~0);" "assume !(1 == ~main_diff_ev~0);" "assume !(1 == ~main_pres_ev~0);" "assume !(1 == ~main_dbl_ev~0);" "assume 1 == ~main_zero_ev~0;~main_zero_ev~0 := 2;" "assume !(1 == ~main_clk_ev~0);" "assume !(1 == ~main_clk_pos_edge~0);" "assume !(1 == ~main_clk_neg_edge~0);" [2024-11-12 21:44:47,360 INFO L749 eck$LassoCheckResult]: Loop: "assume !false;" "start_simulation_~kernel_st~0#1 := 1;assume { :begin_inline_eval } true;havoc eval_#t~nondet4#1, eval_#t~nondet5#1, eval_#t~nondet6#1, eval_#t~nondet7#1, eval_#t~nondet8#1, eval_~tmp~0#1, eval_~tmp___0~0#1, eval_~tmp___1~0#1, eval_~tmp___2~0#1, eval_~tmp___3~0#1;havoc eval_~tmp~0#1;havoc eval_~tmp___0~0#1;havoc eval_~tmp___1~0#1;havoc eval_~tmp___2~0#1;havoc eval_~tmp___3~0#1;" "assume !false;" "assume !(0 == ~N_generate_st~0);" "assume !(0 == ~S1_addsub_st~0);" "assume !(0 == ~S2_presdbl_st~0);" "assume !(0 == ~S3_zero_st~0);" "assume !(0 == ~D_print_st~0);" "havoc eval_#t~nondet4#1, eval_#t~nondet5#1, eval_#t~nondet6#1, eval_#t~nondet7#1, eval_#t~nondet8#1, eval_~tmp~0#1, eval_~tmp___0~0#1, eval_~tmp___1~0#1, eval_~tmp___2~0#1, eval_~tmp___3~0#1;assume { :end_inline_eval } true;start_simulation_~kernel_st~0#1 := 2;" "assume !(1 == ~main_in1_req_up~0);" "assume !(1 == ~main_in2_req_up~0);" "assume !(1 == ~main_sum_req_up~0);" "assume !(1 == ~main_diff_req_up~0);" "assume !(1 == ~main_pres_req_up~0);" "assume !(1 == ~main_dbl_req_up~0);" "assume !(1 == ~main_zero_req_up~0);" "assume !(1 == ~main_clk_req_up~0);" "start_simulation_~kernel_st~0#1 := 3;" "assume !(0 == ~main_in1_ev~0);" "assume 0 == ~main_in2_ev~0;~main_in2_ev~0 := 1;" "assume 0 == ~main_sum_ev~0;~main_sum_ev~0 := 1;" "assume 0 == ~main_diff_ev~0;~main_diff_ev~0 := 1;" "assume 0 == ~main_pres_ev~0;~main_pres_ev~0 := 1;" "assume !(0 == ~main_dbl_ev~0);" "assume 0 == ~main_zero_ev~0;~main_zero_ev~0 := 1;" "assume 0 == ~main_clk_ev~0;~main_clk_ev~0 := 1;" "assume !(0 == ~main_clk_pos_edge~0);" "assume 0 == ~main_clk_neg_edge~0;~main_clk_neg_edge~0 := 1;" "assume 1 == ~main_clk_pos_edge~0;~N_generate_st~0 := 0;" "assume 1 == ~main_clk_pos_edge~0;~S1_addsub_st~0 := 0;" "assume 1 == ~main_clk_pos_edge~0;~S2_presdbl_st~0 := 0;" "assume 1 == ~main_clk_pos_edge~0;~S3_zero_st~0 := 0;" "assume 1 == ~main_clk_pos_edge~0;~D_print_st~0 := 0;" "assume !(1 == ~main_in1_ev~0);" "assume !(1 == ~main_in2_ev~0);" "assume 1 == ~main_sum_ev~0;~main_sum_ev~0 := 2;" "assume 1 == ~main_diff_ev~0;~main_diff_ev~0 := 2;" "assume 1 == ~main_pres_ev~0;~main_pres_ev~0 := 2;" "assume !(1 == ~main_dbl_ev~0);" "assume 1 == ~main_zero_ev~0;~main_zero_ev~0 := 2;" "assume 1 == ~main_clk_ev~0;~main_clk_ev~0 := 2;" "assume 1 == ~main_clk_pos_edge~0;~main_clk_pos_edge~0 := 2;" "assume !(1 == ~main_clk_neg_edge~0);" "assume 0 == ~N_generate_st~0;" [2024-11-12 21:44:47,364 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 21:44:47,364 INFO L85 PathProgramCache]: Analyzing trace with hash -35328133, now seen corresponding path program 1 times [2024-11-12 21:44:47,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 21:44:47,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31038312] [2024-11-12 21:44:47,365 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 21:44:47,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 21:44:47,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 21:44:47,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 21:44:47,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31038312] [2024-11-12 21:44:47,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31038312] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 21:44:47,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579781368] [2024-11-12 21:44:47,413 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 21:44:47,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 21:44:47,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 21:44:47,417 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 21:44:47,419 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-12 21:44:47,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 21:44:47,491 INFO L256 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-12 21:44:47,531 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 21:44:47,584 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 21:44:47,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [579781368] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 21:44:47,639 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 21:44:47,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2024-11-12 21:44:47,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424163344] [2024-11-12 21:44:47,639 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 21:44:47,639 INFO L752 eck$LassoCheckResult]: stem already infeasible [2024-11-12 21:44:47,640 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 21:44:47,640 INFO L85 PathProgramCache]: Analyzing trace with hash -1311168336, now seen corresponding path program 1 times [2024-11-12 21:44:47,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 21:44:47,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402532235] [2024-11-12 21:44:47,640 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 21:44:47,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 21:44:47,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 21:44:47,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 21:44:47,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402532235] [2024-11-12 21:44:47,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402532235] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 21:44:47,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687554123] [2024-11-12 21:44:47,669 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 21:44:47,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 21:44:47,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 21:44:47,671 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 21:44:47,672 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-12 21:44:47,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 21:44:47,730 INFO L256 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-12 21:44:47,731 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 21:44:47,754 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 21:44:47,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1687554123] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 21:44:47,776 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 21:44:47,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 3 [2024-11-12 21:44:47,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308325859] [2024-11-12 21:44:47,776 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 21:44:47,777 INFO L764 eck$LassoCheckResult]: loop already infeasible [2024-11-12 21:44:47,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 21:44:47,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-12 21:44:47,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-12 21:44:47,778 INFO L87 Difference]: Start difference. First operand 2543 states and 4486 transitions. cyclomatic complexity: 1951 Second operand has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 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) [2024-11-12 21:44:48,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-12 21:44:48,214 INFO L93 Difference]: Finished difference Result 6293 states and 10726 transitions. [2024-11-12 21:44:48,215 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 6293 states and 10726 transitions. [2024-11-12 21:44:48,260 INFO L131 ngComponentsAnalysis]: Automaton has 8 accepting balls. 5990 [2024-11-12 21:44:48,294 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 6293 states to 6293 states and 10726 transitions. [2024-11-12 21:44:48,295 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 6293 [2024-11-12 21:44:48,304 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 6293 [2024-11-12 21:44:48,304 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6293 states and 10726 transitions. [2024-11-12 21:44:48,313 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2024-11-12 21:44:48,314 INFO L218 hiAutomatonCegarLoop]: Abstraction has 6293 states and 10726 transitions. [2024-11-12 21:44:48,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6293 states and 10726 transitions. [2024-11-12 21:44:48,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6293 to 6293. [2024-11-12 21:44:48,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6293 states, 6293 states have (on average 1.7044334975369457) internal successors, (10726), 6292 states have internal predecessors, (10726), 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) [2024-11-12 21:44:48,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6293 states to 6293 states and 10726 transitions. [2024-11-12 21:44:48,478 INFO L240 hiAutomatonCegarLoop]: Abstraction has 6293 states and 10726 transitions. [2024-11-12 21:44:48,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-12 21:44:48,479 INFO L426 stractBuchiCegarLoop]: Abstraction has 6293 states and 10726 transitions. [2024-11-12 21:44:48,479 INFO L333 stractBuchiCegarLoop]: ======== Iteration 5 ============ [2024-11-12 21:44:48,479 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 6293 states and 10726 transitions. [2024-11-12 21:44:48,512 INFO L131 ngComponentsAnalysis]: Automaton has 8 accepting balls. 5990 [2024-11-12 21:44:48,513 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2024-11-12 21:44:48,513 INFO L119 BuchiIsEmpty]: Starting construction of run [2024-11-12 21:44:48,514 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 21:44:48,514 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 21:44:48,515 INFO L747 eck$LassoCheckResult]: Stem: "assume { :begin_inline_ULTIMATE.init } true;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int#0(48, 1, 0, 1);call write~init~int#0(0, 1, 1, 1);call #Ultimate.allocInit(17, 2);call #Ultimate.allocInit(12, 3);~main_in1_val~0 := 0;~main_in1_val_t~0 := 0;~main_in1_ev~0 := 0;~main_in1_req_up~0 := 0;~main_in2_val~0 := 0;~main_in2_val_t~0 := 0;~main_in2_ev~0 := 0;~main_in2_req_up~0 := 0;~main_diff_val~0 := 0;~main_diff_val_t~0 := 0;~main_diff_ev~0 := 0;~main_diff_req_up~0 := 0;~main_sum_val~0 := 0;~main_sum_val_t~0 := 0;~main_sum_ev~0 := 0;~main_sum_req_up~0 := 0;~main_pres_val~0 := 0;~main_pres_val_t~0 := 0;~main_pres_ev~0 := 0;~main_pres_req_up~0 := 0;~main_dbl_val~0 := 0;~main_dbl_val_t~0 := 0;~main_dbl_ev~0 := 0;~main_dbl_req_up~0 := 0;~main_zero_val~0 := 0;~main_zero_val_t~0 := 0;~main_zero_ev~0 := 0;~main_zero_req_up~0 := 0;~main_clk_val~0 := 0;~main_clk_val_t~0 := 0;~main_clk_ev~0 := 0;~main_clk_req_up~0 := 0;~main_clk_pos_edge~0 := 0;~main_clk_neg_edge~0 := 0;~N_generate_st~0 := 0;~N_generate_i~0 := 0;~S1_addsub_st~0 := 0;~S1_addsub_i~0 := 0;~S2_presdbl_st~0 := 0;~S2_presdbl_i~0 := 0;~S3_zero_st~0 := 0;~S3_zero_i~0 := 0;~D_z~0 := 0;~D_print_st~0 := 0;~D_print_i~0 := 0;" "assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_~count~0#1, main_~__retres2~0#1;havoc main_~count~0#1;havoc main_~__retres2~0#1;~main_in1_ev~0 := 2;~main_in1_req_up~0 := 0;~main_in2_ev~0 := 2;~main_in2_req_up~0 := 0;~main_diff_ev~0 := 2;~main_diff_req_up~0 := 0;~main_sum_ev~0 := 2;~main_sum_req_up~0 := 0;~main_pres_ev~0 := 2;~main_pres_req_up~0 := 0;~main_dbl_ev~0 := 2;~main_dbl_req_up~0 := 0;~main_zero_ev~0 := 2;~main_zero_req_up~0 := 0;~main_clk_val~0 := 0;~main_clk_ev~0 := 2;~main_clk_req_up~0 := 0;~main_clk_pos_edge~0 := 2;~main_clk_neg_edge~0 := 2;main_~count~0#1 := 0;~N_generate_i~0 := 0;~S1_addsub_i~0 := 0;~S2_presdbl_i~0 := 0;~S3_zero_i~0 := 0;~D_print_i~0 := 0;assume { :begin_inline_start_simulation } true;havoc start_simulation_~kernel_st~0#1;havoc start_simulation_~kernel_st~0#1;start_simulation_~kernel_st~0#1 := 0;" "assume !(1 == ~main_in1_req_up~0);" "assume !(1 == ~main_in2_req_up~0);" "assume !(1 == ~main_sum_req_up~0);" "assume !(1 == ~main_diff_req_up~0);" "assume !(1 == ~main_pres_req_up~0);" "assume !(1 == ~main_dbl_req_up~0);" "assume !(1 == ~main_zero_req_up~0);" "assume !(1 == ~main_clk_req_up~0);" "assume !(1 == ~N_generate_i~0);~N_generate_st~0 := 2;" "assume !(1 == ~S1_addsub_i~0);~S1_addsub_st~0 := 2;" "assume !(1 == ~S2_presdbl_i~0);~S2_presdbl_st~0 := 2;" "assume !(1 == ~S3_zero_i~0);~S3_zero_st~0 := 2;" "assume !(1 == ~D_print_i~0);~D_print_st~0 := 2;" "assume !(0 == ~main_in1_ev~0);" "assume !(0 == ~main_in2_ev~0);" "assume !(0 == ~main_sum_ev~0);" "assume !(0 == ~main_diff_ev~0);" "assume !(0 == ~main_pres_ev~0);" "assume !(0 == ~main_dbl_ev~0);" "assume !(0 == ~main_zero_ev~0);" "assume !(0 == ~main_clk_ev~0);" "assume 0 == ~main_clk_pos_edge~0;~main_clk_pos_edge~0 := 1;" "assume !(0 == ~main_clk_neg_edge~0);" "assume 1 == ~main_clk_pos_edge~0;~N_generate_st~0 := 0;" "assume 1 == ~main_clk_pos_edge~0;~S1_addsub_st~0 := 0;" "assume 1 == ~main_clk_pos_edge~0;~S2_presdbl_st~0 := 0;" "assume !(1 == ~main_clk_pos_edge~0);" "assume !(1 == ~main_clk_pos_edge~0);" "assume !(1 == ~main_in1_ev~0);" "assume !(1 == ~main_in2_ev~0);" "assume !(1 == ~main_sum_ev~0);" "assume !(1 == ~main_diff_ev~0);" "assume !(1 == ~main_pres_ev~0);" "assume !(1 == ~main_dbl_ev~0);" "assume !(1 == ~main_zero_ev~0);" "assume !(1 == ~main_clk_ev~0);" "assume !(1 == ~main_clk_pos_edge~0);" "assume !(1 == ~main_clk_neg_edge~0);" [2024-11-12 21:44:48,515 INFO L749 eck$LassoCheckResult]: Loop: "assume !false;" "start_simulation_~kernel_st~0#1 := 1;assume { :begin_inline_eval } true;havoc eval_#t~nondet4#1, eval_#t~nondet5#1, eval_#t~nondet6#1, eval_#t~nondet7#1, eval_#t~nondet8#1, eval_~tmp~0#1, eval_~tmp___0~0#1, eval_~tmp___1~0#1, eval_~tmp___2~0#1, eval_~tmp___3~0#1;havoc eval_~tmp~0#1;havoc eval_~tmp___0~0#1;havoc eval_~tmp___1~0#1;havoc eval_~tmp___2~0#1;havoc eval_~tmp___3~0#1;" "assume !false;" "assume !(0 == ~N_generate_st~0);" "assume !(0 == ~S1_addsub_st~0);" "assume !(0 == ~S2_presdbl_st~0);" "assume !(0 == ~S3_zero_st~0);" "assume !(0 == ~D_print_st~0);" "havoc eval_#t~nondet4#1, eval_#t~nondet5#1, eval_#t~nondet6#1, eval_#t~nondet7#1, eval_#t~nondet8#1, eval_~tmp~0#1, eval_~tmp___0~0#1, eval_~tmp___1~0#1, eval_~tmp___2~0#1, eval_~tmp___3~0#1;assume { :end_inline_eval } true;start_simulation_~kernel_st~0#1 := 2;" "assume !(1 == ~main_in1_req_up~0);" "assume !(1 == ~main_in2_req_up~0);" "assume !(1 == ~main_sum_req_up~0);" "assume !(1 == ~main_diff_req_up~0);" "assume !(1 == ~main_pres_req_up~0);" "assume !(1 == ~main_dbl_req_up~0);" "assume !(1 == ~main_zero_req_up~0);" "assume !(1 == ~main_clk_req_up~0);" "start_simulation_~kernel_st~0#1 := 3;" "assume !(0 == ~main_in1_ev~0);" "assume 0 == ~main_in2_ev~0;~main_in2_ev~0 := 1;" "assume 0 == ~main_sum_ev~0;~main_sum_ev~0 := 1;" "assume 0 == ~main_diff_ev~0;~main_diff_ev~0 := 1;" "assume 0 == ~main_pres_ev~0;~main_pres_ev~0 := 1;" "assume !(0 == ~main_dbl_ev~0);" "assume !(0 == ~main_zero_ev~0);" "assume 0 == ~main_clk_ev~0;~main_clk_ev~0 := 1;" "assume 0 == ~main_clk_pos_edge~0;~main_clk_pos_edge~0 := 1;" "assume 0 == ~main_clk_neg_edge~0;~main_clk_neg_edge~0 := 1;" "assume 1 == ~main_clk_pos_edge~0;~N_generate_st~0 := 0;" "assume 1 == ~main_clk_pos_edge~0;~S1_addsub_st~0 := 0;" "assume 1 == ~main_clk_pos_edge~0;~S2_presdbl_st~0 := 0;" "assume !(1 == ~main_clk_pos_edge~0);" "assume !(1 == ~main_clk_pos_edge~0);" "assume !(1 == ~main_in1_ev~0);" "assume !(1 == ~main_in2_ev~0);" "assume 1 == ~main_sum_ev~0;~main_sum_ev~0 := 2;" "assume 1 == ~main_diff_ev~0;~main_diff_ev~0 := 2;" "assume 1 == ~main_pres_ev~0;~main_pres_ev~0 := 2;" "assume !(1 == ~main_dbl_ev~0);" "assume !(1 == ~main_zero_ev~0);" "assume 1 == ~main_clk_ev~0;~main_clk_ev~0 := 2;" "assume !(1 == ~main_clk_pos_edge~0);" "assume !(1 == ~main_clk_neg_edge~0);" "assume 0 == ~N_generate_st~0;" [2024-11-12 21:44:48,515 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 21:44:48,516 INFO L85 PathProgramCache]: Analyzing trace with hash 394064435, now seen corresponding path program 1 times [2024-11-12 21:44:48,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 21:44:48,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292592723] [2024-11-12 21:44:48,516 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 21:44:48,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 21:44:48,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 21:44:48,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 21:44:48,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292592723] [2024-11-12 21:44:48,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292592723] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 21:44:48,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205558981] [2024-11-12 21:44:48,584 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 21:44:48,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 21:44:48,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 21:44:48,586 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 21:44:48,588 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-12 21:44:48,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 21:44:48,678 INFO L256 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-12 21:44:48,679 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 21:44:48,729 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 21:44:48,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1205558981] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 21:44:48,775 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 21:44:48,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 6 [2024-11-12 21:44:48,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467174851] [2024-11-12 21:44:48,775 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 21:44:48,776 INFO L752 eck$LassoCheckResult]: stem already infeasible [2024-11-12 21:44:48,776 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 21:44:48,776 INFO L85 PathProgramCache]: Analyzing trace with hash -461463692, now seen corresponding path program 1 times [2024-11-12 21:44:48,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 21:44:48,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816447473] [2024-11-12 21:44:48,777 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 21:44:48,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 21:44:48,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 21:44:48,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 21:44:48,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816447473] [2024-11-12 21:44:48,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816447473] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 21:44:48,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948352680] [2024-11-12 21:44:48,803 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 21:44:48,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 21:44:48,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 21:44:48,806 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 21:44:48,807 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-12 21:44:48,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 21:44:48,864 INFO L256 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-12 21:44:48,866 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 21:44:48,875 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 21:44:48,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1948352680] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 21:44:48,885 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 21:44:48,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 3 [2024-11-12 21:44:48,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427679837] [2024-11-12 21:44:48,885 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 21:44:48,885 INFO L764 eck$LassoCheckResult]: loop already infeasible [2024-11-12 21:44:48,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 21:44:48,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-12 21:44:48,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-11-12 21:44:48,886 INFO L87 Difference]: Start difference. First operand 6293 states and 10726 transitions. cyclomatic complexity: 4441 Second operand has 6 states, 6 states have (on average 14.333333333333334) internal successors, (86), 6 states have internal predecessors, (86), 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) [2024-11-12 21:44:49,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-12 21:44:49,429 INFO L93 Difference]: Finished difference Result 17349 states and 28680 transitions. [2024-11-12 21:44:49,429 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 17349 states and 28680 transitions. [2024-11-12 21:44:49,530 INFO L131 ngComponentsAnalysis]: Automaton has 16 accepting balls. 16618 [2024-11-12 21:44:49,604 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 17349 states to 17349 states and 28680 transitions. [2024-11-12 21:44:49,604 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 17349 [2024-11-12 21:44:49,620 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 17349 [2024-11-12 21:44:49,620 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17349 states and 28680 transitions. [2024-11-12 21:44:49,642 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2024-11-12 21:44:49,642 INFO L218 hiAutomatonCegarLoop]: Abstraction has 17349 states and 28680 transitions. [2024-11-12 21:44:49,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17349 states and 28680 transitions. [2024-11-12 21:44:49,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17349 to 12311. [2024-11-12 21:44:49,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12311 states, 12311 states have (on average 1.6585980017870197) internal successors, (20419), 12310 states have internal predecessors, (20419), 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) [2024-11-12 21:44:49,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12311 states to 12311 states and 20419 transitions. [2024-11-12 21:44:49,955 INFO L240 hiAutomatonCegarLoop]: Abstraction has 12311 states and 20419 transitions. [2024-11-12 21:44:49,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-12 21:44:49,956 INFO L426 stractBuchiCegarLoop]: Abstraction has 12311 states and 20419 transitions. [2024-11-12 21:44:49,956 INFO L333 stractBuchiCegarLoop]: ======== Iteration 6 ============ [2024-11-12 21:44:49,956 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 12311 states and 20419 transitions. [2024-11-12 21:44:50,000 INFO L131 ngComponentsAnalysis]: Automaton has 16 accepting balls. 11768 [2024-11-12 21:44:50,001 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2024-11-12 21:44:50,001 INFO L119 BuchiIsEmpty]: Starting construction of run [2024-11-12 21:44:50,003 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 21:44:50,003 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 21:44:50,003 INFO L747 eck$LassoCheckResult]: Stem: "assume { :begin_inline_ULTIMATE.init } true;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int#0(48, 1, 0, 1);call write~init~int#0(0, 1, 1, 1);call #Ultimate.allocInit(17, 2);call #Ultimate.allocInit(12, 3);~main_in1_val~0 := 0;~main_in1_val_t~0 := 0;~main_in1_ev~0 := 0;~main_in1_req_up~0 := 0;~main_in2_val~0 := 0;~main_in2_val_t~0 := 0;~main_in2_ev~0 := 0;~main_in2_req_up~0 := 0;~main_diff_val~0 := 0;~main_diff_val_t~0 := 0;~main_diff_ev~0 := 0;~main_diff_req_up~0 := 0;~main_sum_val~0 := 0;~main_sum_val_t~0 := 0;~main_sum_ev~0 := 0;~main_sum_req_up~0 := 0;~main_pres_val~0 := 0;~main_pres_val_t~0 := 0;~main_pres_ev~0 := 0;~main_pres_req_up~0 := 0;~main_dbl_val~0 := 0;~main_dbl_val_t~0 := 0;~main_dbl_ev~0 := 0;~main_dbl_req_up~0 := 0;~main_zero_val~0 := 0;~main_zero_val_t~0 := 0;~main_zero_ev~0 := 0;~main_zero_req_up~0 := 0;~main_clk_val~0 := 0;~main_clk_val_t~0 := 0;~main_clk_ev~0 := 0;~main_clk_req_up~0 := 0;~main_clk_pos_edge~0 := 0;~main_clk_neg_edge~0 := 0;~N_generate_st~0 := 0;~N_generate_i~0 := 0;~S1_addsub_st~0 := 0;~S1_addsub_i~0 := 0;~S2_presdbl_st~0 := 0;~S2_presdbl_i~0 := 0;~S3_zero_st~0 := 0;~S3_zero_i~0 := 0;~D_z~0 := 0;~D_print_st~0 := 0;~D_print_i~0 := 0;" "assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_~count~0#1, main_~__retres2~0#1;havoc main_~count~0#1;havoc main_~__retres2~0#1;~main_in1_ev~0 := 2;~main_in1_req_up~0 := 0;~main_in2_ev~0 := 2;~main_in2_req_up~0 := 0;~main_diff_ev~0 := 2;~main_diff_req_up~0 := 0;~main_sum_ev~0 := 2;~main_sum_req_up~0 := 0;~main_pres_ev~0 := 2;~main_pres_req_up~0 := 0;~main_dbl_ev~0 := 2;~main_dbl_req_up~0 := 0;~main_zero_ev~0 := 2;~main_zero_req_up~0 := 0;~main_clk_val~0 := 0;~main_clk_ev~0 := 2;~main_clk_req_up~0 := 0;~main_clk_pos_edge~0 := 2;~main_clk_neg_edge~0 := 2;main_~count~0#1 := 0;~N_generate_i~0 := 0;~S1_addsub_i~0 := 0;~S2_presdbl_i~0 := 0;~S3_zero_i~0 := 0;~D_print_i~0 := 0;assume { :begin_inline_start_simulation } true;havoc start_simulation_~kernel_st~0#1;havoc start_simulation_~kernel_st~0#1;start_simulation_~kernel_st~0#1 := 0;" "assume !(1 == ~main_in1_req_up~0);" "assume !(1 == ~main_in2_req_up~0);" "assume !(1 == ~main_sum_req_up~0);" "assume !(1 == ~main_diff_req_up~0);" "assume !(1 == ~main_pres_req_up~0);" "assume !(1 == ~main_dbl_req_up~0);" "assume !(1 == ~main_zero_req_up~0);" "assume !(1 == ~main_clk_req_up~0);" "assume !(1 == ~N_generate_i~0);~N_generate_st~0 := 2;" "assume !(1 == ~S1_addsub_i~0);~S1_addsub_st~0 := 2;" "assume !(1 == ~S2_presdbl_i~0);~S2_presdbl_st~0 := 2;" "assume !(1 == ~S3_zero_i~0);~S3_zero_st~0 := 2;" "assume !(1 == ~D_print_i~0);~D_print_st~0 := 2;" "assume !(0 == ~main_in1_ev~0);" "assume !(0 == ~main_in2_ev~0);" "assume !(0 == ~main_sum_ev~0);" "assume !(0 == ~main_diff_ev~0);" "assume !(0 == ~main_pres_ev~0);" "assume !(0 == ~main_dbl_ev~0);" "assume !(0 == ~main_zero_ev~0);" "assume !(0 == ~main_clk_ev~0);" "assume !(0 == ~main_clk_pos_edge~0);" "assume !(0 == ~main_clk_neg_edge~0);" "assume !(1 == ~main_clk_pos_edge~0);" "assume !(1 == ~main_clk_pos_edge~0);" "assume !(1 == ~main_clk_pos_edge~0);" "assume !(1 == ~main_clk_pos_edge~0);" "assume !(1 == ~main_clk_pos_edge~0);" "assume !(1 == ~main_in1_ev~0);" "assume !(1 == ~main_in2_ev~0);" "assume !(1 == ~main_sum_ev~0);" "assume !(1 == ~main_diff_ev~0);" "assume !(1 == ~main_pres_ev~0);" "assume !(1 == ~main_dbl_ev~0);" "assume !(1 == ~main_zero_ev~0);" "assume !(1 == ~main_clk_ev~0);" "assume !(1 == ~main_clk_pos_edge~0);" "assume !(1 == ~main_clk_neg_edge~0);" [2024-11-12 21:44:50,003 INFO L749 eck$LassoCheckResult]: Loop: "assume !false;" "start_simulation_~kernel_st~0#1 := 1;assume { :begin_inline_eval } true;havoc eval_#t~nondet4#1, eval_#t~nondet5#1, eval_#t~nondet6#1, eval_#t~nondet7#1, eval_#t~nondet8#1, eval_~tmp~0#1, eval_~tmp___0~0#1, eval_~tmp___1~0#1, eval_~tmp___2~0#1, eval_~tmp___3~0#1;havoc eval_~tmp~0#1;havoc eval_~tmp___0~0#1;havoc eval_~tmp___1~0#1;havoc eval_~tmp___2~0#1;havoc eval_~tmp___3~0#1;" "assume !false;" "assume !(0 == ~N_generate_st~0);" "assume !(0 == ~S1_addsub_st~0);" "assume !(0 == ~S2_presdbl_st~0);" "assume !(0 == ~S3_zero_st~0);" "assume !(0 == ~D_print_st~0);" "havoc eval_#t~nondet4#1, eval_#t~nondet5#1, eval_#t~nondet6#1, eval_#t~nondet7#1, eval_#t~nondet8#1, eval_~tmp~0#1, eval_~tmp___0~0#1, eval_~tmp___1~0#1, eval_~tmp___2~0#1, eval_~tmp___3~0#1;assume { :end_inline_eval } true;start_simulation_~kernel_st~0#1 := 2;" "assume !(1 == ~main_in1_req_up~0);" "assume !(1 == ~main_in2_req_up~0);" "assume !(1 == ~main_sum_req_up~0);" "assume !(1 == ~main_diff_req_up~0);" "assume !(1 == ~main_pres_req_up~0);" "assume !(1 == ~main_dbl_req_up~0);" "assume !(1 == ~main_zero_req_up~0);" "assume !(1 == ~main_clk_req_up~0);" "start_simulation_~kernel_st~0#1 := 3;" "assume !(0 == ~main_in1_ev~0);" "assume 0 == ~main_in2_ev~0;~main_in2_ev~0 := 1;" "assume 0 == ~main_sum_ev~0;~main_sum_ev~0 := 1;" "assume 0 == ~main_diff_ev~0;~main_diff_ev~0 := 1;" "assume 0 == ~main_pres_ev~0;~main_pres_ev~0 := 1;" "assume !(0 == ~main_dbl_ev~0);" "assume !(0 == ~main_zero_ev~0);" "assume 0 == ~main_clk_ev~0;~main_clk_ev~0 := 1;" "assume !(0 == ~main_clk_pos_edge~0);" "assume 0 == ~main_clk_neg_edge~0;~main_clk_neg_edge~0 := 1;" "assume !(1 == ~main_clk_pos_edge~0);" "assume !(1 == ~main_clk_pos_edge~0);" "assume !(1 == ~main_clk_pos_edge~0);" "assume !(1 == ~main_clk_pos_edge~0);" "assume !(1 == ~main_clk_pos_edge~0);" "assume !(1 == ~main_in1_ev~0);" "assume !(1 == ~main_in2_ev~0);" "assume 1 == ~main_sum_ev~0;~main_sum_ev~0 := 2;" "assume 1 == ~main_diff_ev~0;~main_diff_ev~0 := 2;" "assume 1 == ~main_pres_ev~0;~main_pres_ev~0 := 2;" "assume !(1 == ~main_dbl_ev~0);" "assume !(1 == ~main_zero_ev~0);" "assume 1 == ~main_clk_ev~0;~main_clk_ev~0 := 2;" "assume !(1 == ~main_clk_pos_edge~0);" "assume !(1 == ~main_clk_neg_edge~0);" "assume 0 == ~N_generate_st~0;" [2024-11-12 21:44:50,004 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 21:44:50,004 INFO L85 PathProgramCache]: Analyzing trace with hash 222896887, now seen corresponding path program 1 times [2024-11-12 21:44:50,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 21:44:50,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332830018] [2024-11-12 21:44:50,004 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 21:44:50,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 21:44:50,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-12 21:44:50,017 INFO L357 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-12 21:44:50,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-12 21:44:50,058 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-12 21:44:50,059 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 21:44:50,059 INFO L85 PathProgramCache]: Analyzing trace with hash -1472690384, now seen corresponding path program 1 times [2024-11-12 21:44:50,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 21:44:50,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252941950] [2024-11-12 21:44:50,059 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 21:44:50,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 21:44:50,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 21:44:50,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 21:44:50,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252941950] [2024-11-12 21:44:50,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252941950] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 21:44:50,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771318632] [2024-11-12 21:44:50,095 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 21:44:50,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 21:44:50,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 21:44:50,098 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 21:44:50,101 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-12 21:44:50,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 21:44:50,161 INFO L256 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-12 21:44:50,162 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 21:44:50,186 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 21:44:50,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [771318632] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 21:44:50,206 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 21:44:50,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 3 [2024-11-12 21:44:50,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619921006] [2024-11-12 21:44:50,206 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 21:44:50,207 INFO L764 eck$LassoCheckResult]: loop already infeasible [2024-11-12 21:44:50,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 21:44:50,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-12 21:44:50,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-12 21:44:50,208 INFO L87 Difference]: Start difference. First operand 12311 states and 20419 transitions. cyclomatic complexity: 8124 Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 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) [2024-11-12 21:44:50,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-12 21:44:50,367 INFO L93 Difference]: Finished difference Result 16157 states and 26376 transitions. [2024-11-12 21:44:50,367 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 16157 states and 26376 transitions. [2024-11-12 21:44:50,437 INFO L131 ngComponentsAnalysis]: Automaton has 16 accepting balls. 15368 [2024-11-12 21:44:50,556 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 16157 states to 16157 states and 26376 transitions. [2024-11-12 21:44:50,556 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 16157 [2024-11-12 21:44:50,583 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 16157 [2024-11-12 21:44:50,583 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16157 states and 26376 transitions. [2024-11-12 21:44:50,620 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2024-11-12 21:44:50,620 INFO L218 hiAutomatonCegarLoop]: Abstraction has 16157 states and 26376 transitions. [2024-11-12 21:44:50,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16157 states and 26376 transitions. [2024-11-12 21:44:50,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16157 to 16157. [2024-11-12 21:44:51,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16157 states, 16157 states have (on average 1.6324812774648758) internal successors, (26376), 16156 states have internal predecessors, (26376), 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) [2024-11-12 21:44:51,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16157 states to 16157 states and 26376 transitions. [2024-11-12 21:44:51,081 INFO L240 hiAutomatonCegarLoop]: Abstraction has 16157 states and 26376 transitions. [2024-11-12 21:44:51,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-12 21:44:51,082 INFO L426 stractBuchiCegarLoop]: Abstraction has 16157 states and 26376 transitions. [2024-11-12 21:44:51,084 INFO L333 stractBuchiCegarLoop]: ======== Iteration 7 ============ [2024-11-12 21:44:51,084 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 16157 states and 26376 transitions. [2024-11-12 21:44:51,255 INFO L131 ngComponentsAnalysis]: Automaton has 16 accepting balls. 15368 [2024-11-12 21:44:51,255 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2024-11-12 21:44:51,256 INFO L119 BuchiIsEmpty]: Starting construction of run [2024-11-12 21:44:51,256 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 21:44:51,256 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 21:44:51,257 INFO L747 eck$LassoCheckResult]: Stem: "assume { :begin_inline_ULTIMATE.init } true;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int#0(48, 1, 0, 1);call write~init~int#0(0, 1, 1, 1);call #Ultimate.allocInit(17, 2);call #Ultimate.allocInit(12, 3);~main_in1_val~0 := 0;~main_in1_val_t~0 := 0;~main_in1_ev~0 := 0;~main_in1_req_up~0 := 0;~main_in2_val~0 := 0;~main_in2_val_t~0 := 0;~main_in2_ev~0 := 0;~main_in2_req_up~0 := 0;~main_diff_val~0 := 0;~main_diff_val_t~0 := 0;~main_diff_ev~0 := 0;~main_diff_req_up~0 := 0;~main_sum_val~0 := 0;~main_sum_val_t~0 := 0;~main_sum_ev~0 := 0;~main_sum_req_up~0 := 0;~main_pres_val~0 := 0;~main_pres_val_t~0 := 0;~main_pres_ev~0 := 0;~main_pres_req_up~0 := 0;~main_dbl_val~0 := 0;~main_dbl_val_t~0 := 0;~main_dbl_ev~0 := 0;~main_dbl_req_up~0 := 0;~main_zero_val~0 := 0;~main_zero_val_t~0 := 0;~main_zero_ev~0 := 0;~main_zero_req_up~0 := 0;~main_clk_val~0 := 0;~main_clk_val_t~0 := 0;~main_clk_ev~0 := 0;~main_clk_req_up~0 := 0;~main_clk_pos_edge~0 := 0;~main_clk_neg_edge~0 := 0;~N_generate_st~0 := 0;~N_generate_i~0 := 0;~S1_addsub_st~0 := 0;~S1_addsub_i~0 := 0;~S2_presdbl_st~0 := 0;~S2_presdbl_i~0 := 0;~S3_zero_st~0 := 0;~S3_zero_i~0 := 0;~D_z~0 := 0;~D_print_st~0 := 0;~D_print_i~0 := 0;" "assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_~count~0#1, main_~__retres2~0#1;havoc main_~count~0#1;havoc main_~__retres2~0#1;~main_in1_ev~0 := 2;~main_in1_req_up~0 := 0;~main_in2_ev~0 := 2;~main_in2_req_up~0 := 0;~main_diff_ev~0 := 2;~main_diff_req_up~0 := 0;~main_sum_ev~0 := 2;~main_sum_req_up~0 := 0;~main_pres_ev~0 := 2;~main_pres_req_up~0 := 0;~main_dbl_ev~0 := 2;~main_dbl_req_up~0 := 0;~main_zero_ev~0 := 2;~main_zero_req_up~0 := 0;~main_clk_val~0 := 0;~main_clk_ev~0 := 2;~main_clk_req_up~0 := 0;~main_clk_pos_edge~0 := 2;~main_clk_neg_edge~0 := 2;main_~count~0#1 := 0;~N_generate_i~0 := 0;~S1_addsub_i~0 := 0;~S2_presdbl_i~0 := 0;~S3_zero_i~0 := 0;~D_print_i~0 := 0;assume { :begin_inline_start_simulation } true;havoc start_simulation_~kernel_st~0#1;havoc start_simulation_~kernel_st~0#1;start_simulation_~kernel_st~0#1 := 0;" "assume !(1 == ~main_in1_req_up~0);" "assume !(1 == ~main_in2_req_up~0);" "assume !(1 == ~main_sum_req_up~0);" "assume !(1 == ~main_diff_req_up~0);" "assume !(1 == ~main_pres_req_up~0);" "assume !(1 == ~main_dbl_req_up~0);" "assume !(1 == ~main_zero_req_up~0);" "assume !(1 == ~main_clk_req_up~0);" "assume !(1 == ~N_generate_i~0);~N_generate_st~0 := 2;" "assume !(1 == ~S1_addsub_i~0);~S1_addsub_st~0 := 2;" "assume !(1 == ~S2_presdbl_i~0);~S2_presdbl_st~0 := 2;" "assume !(1 == ~S3_zero_i~0);~S3_zero_st~0 := 2;" "assume !(1 == ~D_print_i~0);~D_print_st~0 := 2;" "assume !(0 == ~main_in1_ev~0);" "assume 0 == ~main_in2_ev~0;~main_in2_ev~0 := 1;" "assume !(0 == ~main_sum_ev~0);" "assume !(0 == ~main_diff_ev~0);" "assume !(0 == ~main_pres_ev~0);" "assume !(0 == ~main_dbl_ev~0);" "assume !(0 == ~main_zero_ev~0);" "assume !(0 == ~main_clk_ev~0);" "assume !(0 == ~main_clk_pos_edge~0);" "assume !(0 == ~main_clk_neg_edge~0);" "assume !(1 == ~main_clk_pos_edge~0);" "assume !(1 == ~main_clk_pos_edge~0);" "assume !(1 == ~main_clk_pos_edge~0);" "assume !(1 == ~main_clk_pos_edge~0);" "assume !(1 == ~main_clk_pos_edge~0);" "assume !(1 == ~main_in1_ev~0);" "assume 1 == ~main_in2_ev~0;~main_in2_ev~0 := 2;" "assume !(1 == ~main_sum_ev~0);" "assume !(1 == ~main_diff_ev~0);" "assume !(1 == ~main_pres_ev~0);" "assume !(1 == ~main_dbl_ev~0);" "assume !(1 == ~main_zero_ev~0);" "assume !(1 == ~main_clk_ev~0);" "assume !(1 == ~main_clk_pos_edge~0);" "assume !(1 == ~main_clk_neg_edge~0);" [2024-11-12 21:44:51,257 INFO L749 eck$LassoCheckResult]: Loop: "assume !false;" "start_simulation_~kernel_st~0#1 := 1;assume { :begin_inline_eval } true;havoc eval_#t~nondet4#1, eval_#t~nondet5#1, eval_#t~nondet6#1, eval_#t~nondet7#1, eval_#t~nondet8#1, eval_~tmp~0#1, eval_~tmp___0~0#1, eval_~tmp___1~0#1, eval_~tmp___2~0#1, eval_~tmp___3~0#1;havoc eval_~tmp~0#1;havoc eval_~tmp___0~0#1;havoc eval_~tmp___1~0#1;havoc eval_~tmp___2~0#1;havoc eval_~tmp___3~0#1;" "assume !false;" "assume !(0 == ~N_generate_st~0);" "assume !(0 == ~S1_addsub_st~0);" "assume !(0 == ~S2_presdbl_st~0);" "assume !(0 == ~S3_zero_st~0);" "assume !(0 == ~D_print_st~0);" "havoc eval_#t~nondet4#1, eval_#t~nondet5#1, eval_#t~nondet6#1, eval_#t~nondet7#1, eval_#t~nondet8#1, eval_~tmp~0#1, eval_~tmp___0~0#1, eval_~tmp___1~0#1, eval_~tmp___2~0#1, eval_~tmp___3~0#1;assume { :end_inline_eval } true;start_simulation_~kernel_st~0#1 := 2;" "assume !(1 == ~main_in1_req_up~0);" "assume !(1 == ~main_in2_req_up~0);" "assume !(1 == ~main_sum_req_up~0);" "assume !(1 == ~main_diff_req_up~0);" "assume !(1 == ~main_pres_req_up~0);" "assume !(1 == ~main_dbl_req_up~0);" "assume !(1 == ~main_zero_req_up~0);" "assume !(1 == ~main_clk_req_up~0);" "start_simulation_~kernel_st~0#1 := 3;" "assume !(0 == ~main_in1_ev~0);" "assume 0 == ~main_in2_ev~0;~main_in2_ev~0 := 1;" "assume 0 == ~main_sum_ev~0;~main_sum_ev~0 := 1;" "assume 0 == ~main_diff_ev~0;~main_diff_ev~0 := 1;" "assume 0 == ~main_pres_ev~0;~main_pres_ev~0 := 1;" "assume !(0 == ~main_dbl_ev~0);" "assume !(0 == ~main_zero_ev~0);" "assume 0 == ~main_clk_ev~0;~main_clk_ev~0 := 1;" "assume !(0 == ~main_clk_pos_edge~0);" "assume 0 == ~main_clk_neg_edge~0;~main_clk_neg_edge~0 := 1;" "assume !(1 == ~main_clk_pos_edge~0);" "assume !(1 == ~main_clk_pos_edge~0);" "assume !(1 == ~main_clk_pos_edge~0);" "assume !(1 == ~main_clk_pos_edge~0);" "assume !(1 == ~main_clk_pos_edge~0);" "assume !(1 == ~main_in1_ev~0);" "assume 1 == ~main_in2_ev~0;~main_in2_ev~0 := 2;" "assume 1 == ~main_sum_ev~0;~main_sum_ev~0 := 2;" "assume 1 == ~main_diff_ev~0;~main_diff_ev~0 := 2;" "assume 1 == ~main_pres_ev~0;~main_pres_ev~0 := 2;" "assume !(1 == ~main_dbl_ev~0);" "assume !(1 == ~main_zero_ev~0);" "assume 1 == ~main_clk_ev~0;~main_clk_ev~0 := 2;" "assume !(1 == ~main_clk_pos_edge~0);" "assume !(1 == ~main_clk_neg_edge~0);" "assume 0 == ~N_generate_st~0;" [2024-11-12 21:44:51,257 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 21:44:51,257 INFO L85 PathProgramCache]: Analyzing trace with hash -323147977, now seen corresponding path program 1 times [2024-11-12 21:44:51,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 21:44:51,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723622279] [2024-11-12 21:44:51,258 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 21:44:51,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 21:44:51,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 21:44:51,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 21:44:51,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723622279] [2024-11-12 21:44:51,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723622279] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 21:44:51,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750143967] [2024-11-12 21:44:51,324 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 21:44:51,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 21:44:51,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 21:44:51,326 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 21:44:51,328 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-12 21:44:51,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 21:44:51,403 INFO L256 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-12 21:44:51,404 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 21:44:51,428 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 21:44:51,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1750143967] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 21:44:51,453 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 21:44:51,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 6 [2024-11-12 21:44:51,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98280818] [2024-11-12 21:44:51,454 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 21:44:51,454 INFO L752 eck$LassoCheckResult]: stem already infeasible [2024-11-12 21:44:51,454 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 21:44:51,454 INFO L85 PathProgramCache]: Analyzing trace with hash -1079663374, now seen corresponding path program 1 times [2024-11-12 21:44:51,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 21:44:51,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883260933] [2024-11-12 21:44:51,455 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 21:44:51,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 21:44:51,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 21:44:51,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 21:44:51,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883260933] [2024-11-12 21:44:51,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883260933] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 21:44:51,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854181986] [2024-11-12 21:44:51,483 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 21:44:51,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 21:44:51,483 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 21:44:51,485 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 21:44:51,486 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-12 21:44:51,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 21:44:51,543 INFO L256 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-12 21:44:51,544 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 21:44:51,567 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 21:44:51,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1854181986] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 21:44:51,590 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 21:44:51,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 3 [2024-11-12 21:44:51,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888211674] [2024-11-12 21:44:51,591 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 21:44:51,591 INFO L764 eck$LassoCheckResult]: loop already infeasible [2024-11-12 21:44:51,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 21:44:51,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-12 21:44:51,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-11-12 21:44:51,592 INFO L87 Difference]: Start difference. First operand 16157 states and 26376 transitions. cyclomatic complexity: 10235 Second operand has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 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) [2024-11-12 21:44:51,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-12 21:44:51,935 INFO L93 Difference]: Finished difference Result 44217 states and 71353 transitions. [2024-11-12 21:44:51,935 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 44217 states and 71353 transitions. [2024-11-12 21:44:52,077 INFO L131 ngComponentsAnalysis]: Automaton has 32 accepting balls. 42728 [2024-11-12 21:44:52,331 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 44217 states to 44217 states and 71353 transitions. [2024-11-12 21:44:52,331 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 44217 [2024-11-12 21:44:52,375 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 44217 [2024-11-12 21:44:52,375 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44217 states and 71353 transitions. [2024-11-12 21:44:52,422 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2024-11-12 21:44:52,422 INFO L218 hiAutomatonCegarLoop]: Abstraction has 44217 states and 71353 transitions. [2024-11-12 21:44:52,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44217 states and 71353 transitions. [2024-11-12 21:44:52,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44217 to 44217. [2024-11-12 21:44:53,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44217 states, 44217 states have (on average 1.6137006128864464) internal successors, (71353), 44216 states have internal predecessors, (71353), 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) [2024-11-12 21:44:53,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44217 states to 44217 states and 71353 transitions. [2024-11-12 21:44:53,131 INFO L240 hiAutomatonCegarLoop]: Abstraction has 44217 states and 71353 transitions. [2024-11-12 21:44:53,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-12 21:44:53,133 INFO L426 stractBuchiCegarLoop]: Abstraction has 44217 states and 71353 transitions. [2024-11-12 21:44:53,133 INFO L333 stractBuchiCegarLoop]: ======== Iteration 8 ============ [2024-11-12 21:44:53,133 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 44217 states and 71353 transitions. [2024-11-12 21:44:53,466 INFO L131 ngComponentsAnalysis]: Automaton has 32 accepting balls. 42728 [2024-11-12 21:44:53,467 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2024-11-12 21:44:53,467 INFO L119 BuchiIsEmpty]: Starting construction of run [2024-11-12 21:44:53,467 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 21:44:53,467 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 21:44:53,468 INFO L747 eck$LassoCheckResult]: Stem: "assume { :begin_inline_ULTIMATE.init } true;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int#0(48, 1, 0, 1);call write~init~int#0(0, 1, 1, 1);call #Ultimate.allocInit(17, 2);call #Ultimate.allocInit(12, 3);~main_in1_val~0 := 0;~main_in1_val_t~0 := 0;~main_in1_ev~0 := 0;~main_in1_req_up~0 := 0;~main_in2_val~0 := 0;~main_in2_val_t~0 := 0;~main_in2_ev~0 := 0;~main_in2_req_up~0 := 0;~main_diff_val~0 := 0;~main_diff_val_t~0 := 0;~main_diff_ev~0 := 0;~main_diff_req_up~0 := 0;~main_sum_val~0 := 0;~main_sum_val_t~0 := 0;~main_sum_ev~0 := 0;~main_sum_req_up~0 := 0;~main_pres_val~0 := 0;~main_pres_val_t~0 := 0;~main_pres_ev~0 := 0;~main_pres_req_up~0 := 0;~main_dbl_val~0 := 0;~main_dbl_val_t~0 := 0;~main_dbl_ev~0 := 0;~main_dbl_req_up~0 := 0;~main_zero_val~0 := 0;~main_zero_val_t~0 := 0;~main_zero_ev~0 := 0;~main_zero_req_up~0 := 0;~main_clk_val~0 := 0;~main_clk_val_t~0 := 0;~main_clk_ev~0 := 0;~main_clk_req_up~0 := 0;~main_clk_pos_edge~0 := 0;~main_clk_neg_edge~0 := 0;~N_generate_st~0 := 0;~N_generate_i~0 := 0;~S1_addsub_st~0 := 0;~S1_addsub_i~0 := 0;~S2_presdbl_st~0 := 0;~S2_presdbl_i~0 := 0;~S3_zero_st~0 := 0;~S3_zero_i~0 := 0;~D_z~0 := 0;~D_print_st~0 := 0;~D_print_i~0 := 0;" "assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_~count~0#1, main_~__retres2~0#1;havoc main_~count~0#1;havoc main_~__retres2~0#1;~main_in1_ev~0 := 2;~main_in1_req_up~0 := 0;~main_in2_ev~0 := 2;~main_in2_req_up~0 := 0;~main_diff_ev~0 := 2;~main_diff_req_up~0 := 0;~main_sum_ev~0 := 2;~main_sum_req_up~0 := 0;~main_pres_ev~0 := 2;~main_pres_req_up~0 := 0;~main_dbl_ev~0 := 2;~main_dbl_req_up~0 := 0;~main_zero_ev~0 := 2;~main_zero_req_up~0 := 0;~main_clk_val~0 := 0;~main_clk_ev~0 := 2;~main_clk_req_up~0 := 0;~main_clk_pos_edge~0 := 2;~main_clk_neg_edge~0 := 2;main_~count~0#1 := 0;~N_generate_i~0 := 0;~S1_addsub_i~0 := 0;~S2_presdbl_i~0 := 0;~S3_zero_i~0 := 0;~D_print_i~0 := 0;assume { :begin_inline_start_simulation } true;havoc start_simulation_~kernel_st~0#1;havoc start_simulation_~kernel_st~0#1;start_simulation_~kernel_st~0#1 := 0;" "assume !(1 == ~main_in1_req_up~0);" "assume !(1 == ~main_in2_req_up~0);" "assume !(1 == ~main_sum_req_up~0);" "assume !(1 == ~main_diff_req_up~0);" "assume !(1 == ~main_pres_req_up~0);" "assume !(1 == ~main_dbl_req_up~0);" "assume !(1 == ~main_zero_req_up~0);" "assume !(1 == ~main_clk_req_up~0);" "assume !(1 == ~N_generate_i~0);~N_generate_st~0 := 2;" "assume !(1 == ~S1_addsub_i~0);~S1_addsub_st~0 := 2;" "assume !(1 == ~S2_presdbl_i~0);~S2_presdbl_st~0 := 2;" "assume !(1 == ~S3_zero_i~0);~S3_zero_st~0 := 2;" "assume !(1 == ~D_print_i~0);~D_print_st~0 := 2;" "assume !(0 == ~main_in1_ev~0);" "assume !(0 == ~main_in2_ev~0);" "assume !(0 == ~main_sum_ev~0);" "assume !(0 == ~main_diff_ev~0);" "assume !(0 == ~main_pres_ev~0);" "assume !(0 == ~main_dbl_ev~0);" "assume !(0 == ~main_zero_ev~0);" "assume !(0 == ~main_clk_ev~0);" "assume !(0 == ~main_clk_pos_edge~0);" "assume !(0 == ~main_clk_neg_edge~0);" "assume !(1 == ~main_clk_pos_edge~0);" "assume !(1 == ~main_clk_pos_edge~0);" "assume !(1 == ~main_clk_pos_edge~0);" "assume !(1 == ~main_clk_pos_edge~0);" "assume !(1 == ~main_clk_pos_edge~0);" "assume !(1 == ~main_in1_ev~0);" "assume !(1 == ~main_in2_ev~0);" "assume !(1 == ~main_sum_ev~0);" "assume !(1 == ~main_diff_ev~0);" "assume !(1 == ~main_pres_ev~0);" "assume !(1 == ~main_dbl_ev~0);" "assume !(1 == ~main_zero_ev~0);" "assume !(1 == ~main_clk_ev~0);" "assume !(1 == ~main_clk_pos_edge~0);" "assume !(1 == ~main_clk_neg_edge~0);" [2024-11-12 21:44:53,468 INFO L749 eck$LassoCheckResult]: Loop: "assume !false;" "start_simulation_~kernel_st~0#1 := 1;assume { :begin_inline_eval } true;havoc eval_#t~nondet4#1, eval_#t~nondet5#1, eval_#t~nondet6#1, eval_#t~nondet7#1, eval_#t~nondet8#1, eval_~tmp~0#1, eval_~tmp___0~0#1, eval_~tmp___1~0#1, eval_~tmp___2~0#1, eval_~tmp___3~0#1;havoc eval_~tmp~0#1;havoc eval_~tmp___0~0#1;havoc eval_~tmp___1~0#1;havoc eval_~tmp___2~0#1;havoc eval_~tmp___3~0#1;" "assume !false;" "assume !(0 == ~N_generate_st~0);" "assume !(0 == ~S1_addsub_st~0);" "assume !(0 == ~S2_presdbl_st~0);" "assume !(0 == ~S3_zero_st~0);" "assume !(0 == ~D_print_st~0);" "havoc eval_#t~nondet4#1, eval_#t~nondet5#1, eval_#t~nondet6#1, eval_#t~nondet7#1, eval_#t~nondet8#1, eval_~tmp~0#1, eval_~tmp___0~0#1, eval_~tmp___1~0#1, eval_~tmp___2~0#1, eval_~tmp___3~0#1;assume { :end_inline_eval } true;start_simulation_~kernel_st~0#1 := 2;" "assume !(1 == ~main_in1_req_up~0);" "assume !(1 == ~main_in2_req_up~0);" "assume !(1 == ~main_sum_req_up~0);" "assume !(1 == ~main_diff_req_up~0);" "assume !(1 == ~main_pres_req_up~0);" "assume !(1 == ~main_dbl_req_up~0);" "assume !(1 == ~main_zero_req_up~0);" "assume !(1 == ~main_clk_req_up~0);" "start_simulation_~kernel_st~0#1 := 3;" "assume !(0 == ~main_in1_ev~0);" "assume !(0 == ~main_in2_ev~0);" "assume 0 == ~main_sum_ev~0;~main_sum_ev~0 := 1;" "assume 0 == ~main_diff_ev~0;~main_diff_ev~0 := 1;" "assume 0 == ~main_pres_ev~0;~main_pres_ev~0 := 1;" "assume !(0 == ~main_dbl_ev~0);" "assume !(0 == ~main_zero_ev~0);" "assume 0 == ~main_clk_ev~0;~main_clk_ev~0 := 1;" "assume !(0 == ~main_clk_pos_edge~0);" "assume 0 == ~main_clk_neg_edge~0;~main_clk_neg_edge~0 := 1;" "assume !(1 == ~main_clk_pos_edge~0);" "assume !(1 == ~main_clk_pos_edge~0);" "assume !(1 == ~main_clk_pos_edge~0);" "assume !(1 == ~main_clk_pos_edge~0);" "assume !(1 == ~main_clk_pos_edge~0);" "assume !(1 == ~main_in1_ev~0);" "assume !(1 == ~main_in2_ev~0);" "assume 1 == ~main_sum_ev~0;~main_sum_ev~0 := 2;" "assume 1 == ~main_diff_ev~0;~main_diff_ev~0 := 2;" "assume 1 == ~main_pres_ev~0;~main_pres_ev~0 := 2;" "assume !(1 == ~main_dbl_ev~0);" "assume !(1 == ~main_zero_ev~0);" "assume 1 == ~main_clk_ev~0;~main_clk_ev~0 := 2;" "assume !(1 == ~main_clk_pos_edge~0);" "assume !(1 == ~main_clk_neg_edge~0);" "assume 0 == ~N_generate_st~0;" [2024-11-12 21:44:53,468 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 21:44:53,468 INFO L85 PathProgramCache]: Analyzing trace with hash 222896887, now seen corresponding path program 2 times [2024-11-12 21:44:53,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 21:44:53,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822778822] [2024-11-12 21:44:53,468 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 21:44:53,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 21:44:53,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-12 21:44:53,488 INFO L357 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-12 21:44:53,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-12 21:44:53,504 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-12 21:44:53,505 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 21:44:53,505 INFO L85 PathProgramCache]: Analyzing trace with hash -1332141774, now seen corresponding path program 1 times [2024-11-12 21:44:53,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 21:44:53,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75923953] [2024-11-12 21:44:53,505 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 21:44:53,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 21:44:53,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 21:44:53,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 21:44:53,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75923953] [2024-11-12 21:44:53,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75923953] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 21:44:53,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494452800] [2024-11-12 21:44:53,537 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 21:44:53,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 21:44:53,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 21:44:53,539 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 21:44:53,541 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-12 21:44:53,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 21:44:53,597 INFO L256 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-12 21:44:53,597 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 21:44:53,616 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 21:44:53,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [494452800] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 21:44:53,642 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 21:44:53,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 3 [2024-11-12 21:44:53,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308598226] [2024-11-12 21:44:53,642 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 21:44:53,643 INFO L764 eck$LassoCheckResult]: loop already infeasible [2024-11-12 21:44:53,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 21:44:53,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-12 21:44:53,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-12 21:44:53,643 INFO L87 Difference]: Start difference. First operand 44217 states and 71353 transitions. cyclomatic complexity: 27168 Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 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) [2024-11-12 21:44:53,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-12 21:44:53,937 INFO L93 Difference]: Finished difference Result 56589 states and 89856 transitions. [2024-11-12 21:44:53,937 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 56589 states and 89856 transitions. [2024-11-12 21:44:54,136 INFO L131 ngComponentsAnalysis]: Automaton has 32 accepting balls. 54308 [2024-11-12 21:44:54,485 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 56589 states to 56589 states and 89856 transitions. [2024-11-12 21:44:54,486 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 56589 [2024-11-12 21:44:54,529 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 56589 [2024-11-12 21:44:54,529 INFO L73 IsDeterministic]: Start isDeterministic. Operand 56589 states and 89856 transitions. [2024-11-12 21:44:54,584 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2024-11-12 21:44:54,584 INFO L218 hiAutomatonCegarLoop]: Abstraction has 56589 states and 89856 transitions. [2024-11-12 21:44:54,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56589 states and 89856 transitions. [2024-11-12 21:44:55,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56589 to 56589. [2024-11-12 21:44:55,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56589 states, 56589 states have (on average 1.5878704341833219) internal successors, (89856), 56588 states have internal predecessors, (89856), 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) [2024-11-12 21:44:55,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56589 states to 56589 states and 89856 transitions. [2024-11-12 21:44:55,464 INFO L240 hiAutomatonCegarLoop]: Abstraction has 56589 states and 89856 transitions. [2024-11-12 21:44:55,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-12 21:44:55,465 INFO L426 stractBuchiCegarLoop]: Abstraction has 56589 states and 89856 transitions. [2024-11-12 21:44:55,465 INFO L333 stractBuchiCegarLoop]: ======== Iteration 9 ============ [2024-11-12 21:44:55,466 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 56589 states and 89856 transitions. [2024-11-12 21:44:55,794 INFO L131 ngComponentsAnalysis]: Automaton has 32 accepting balls. 54308 [2024-11-12 21:44:55,794 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2024-11-12 21:44:55,794 INFO L119 BuchiIsEmpty]: Starting construction of run [2024-11-12 21:44:55,797 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 21:44:55,798 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 21:44:55,798 INFO L747 eck$LassoCheckResult]: Stem: "assume { :begin_inline_ULTIMATE.init } true;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int#0(48, 1, 0, 1);call write~init~int#0(0, 1, 1, 1);call #Ultimate.allocInit(17, 2);call #Ultimate.allocInit(12, 3);~main_in1_val~0 := 0;~main_in1_val_t~0 := 0;~main_in1_ev~0 := 0;~main_in1_req_up~0 := 0;~main_in2_val~0 := 0;~main_in2_val_t~0 := 0;~main_in2_ev~0 := 0;~main_in2_req_up~0 := 0;~main_diff_val~0 := 0;~main_diff_val_t~0 := 0;~main_diff_ev~0 := 0;~main_diff_req_up~0 := 0;~main_sum_val~0 := 0;~main_sum_val_t~0 := 0;~main_sum_ev~0 := 0;~main_sum_req_up~0 := 0;~main_pres_val~0 := 0;~main_pres_val_t~0 := 0;~main_pres_ev~0 := 0;~main_pres_req_up~0 := 0;~main_dbl_val~0 := 0;~main_dbl_val_t~0 := 0;~main_dbl_ev~0 := 0;~main_dbl_req_up~0 := 0;~main_zero_val~0 := 0;~main_zero_val_t~0 := 0;~main_zero_ev~0 := 0;~main_zero_req_up~0 := 0;~main_clk_val~0 := 0;~main_clk_val_t~0 := 0;~main_clk_ev~0 := 0;~main_clk_req_up~0 := 0;~main_clk_pos_edge~0 := 0;~main_clk_neg_edge~0 := 0;~N_generate_st~0 := 0;~N_generate_i~0 := 0;~S1_addsub_st~0 := 0;~S1_addsub_i~0 := 0;~S2_presdbl_st~0 := 0;~S2_presdbl_i~0 := 0;~S3_zero_st~0 := 0;~S3_zero_i~0 := 0;~D_z~0 := 0;~D_print_st~0 := 0;~D_print_i~0 := 0;" "assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_~count~0#1, main_~__retres2~0#1;havoc main_~count~0#1;havoc main_~__retres2~0#1;~main_in1_ev~0 := 2;~main_in1_req_up~0 := 0;~main_in2_ev~0 := 2;~main_in2_req_up~0 := 0;~main_diff_ev~0 := 2;~main_diff_req_up~0 := 0;~main_sum_ev~0 := 2;~main_sum_req_up~0 := 0;~main_pres_ev~0 := 2;~main_pres_req_up~0 := 0;~main_dbl_ev~0 := 2;~main_dbl_req_up~0 := 0;~main_zero_ev~0 := 2;~main_zero_req_up~0 := 0;~main_clk_val~0 := 0;~main_clk_ev~0 := 2;~main_clk_req_up~0 := 0;~main_clk_pos_edge~0 := 2;~main_clk_neg_edge~0 := 2;main_~count~0#1 := 0;~N_generate_i~0 := 0;~S1_addsub_i~0 := 0;~S2_presdbl_i~0 := 0;~S3_zero_i~0 := 0;~D_print_i~0 := 0;assume { :begin_inline_start_simulation } true;havoc start_simulation_~kernel_st~0#1;havoc start_simulation_~kernel_st~0#1;start_simulation_~kernel_st~0#1 := 0;" "assume !(1 == ~main_in1_req_up~0);" "assume !(1 == ~main_in2_req_up~0);" "assume !(1 == ~main_sum_req_up~0);" "assume !(1 == ~main_diff_req_up~0);" "assume !(1 == ~main_pres_req_up~0);" "assume !(1 == ~main_dbl_req_up~0);" "assume !(1 == ~main_zero_req_up~0);" "assume !(1 == ~main_clk_req_up~0);" "assume !(1 == ~N_generate_i~0);~N_generate_st~0 := 2;" "assume !(1 == ~S1_addsub_i~0);~S1_addsub_st~0 := 2;" "assume !(1 == ~S2_presdbl_i~0);~S2_presdbl_st~0 := 2;" "assume !(1 == ~S3_zero_i~0);~S3_zero_st~0 := 2;" "assume !(1 == ~D_print_i~0);~D_print_st~0 := 2;" "assume !(0 == ~main_in1_ev~0);" "assume !(0 == ~main_in2_ev~0);" "assume !(0 == ~main_sum_ev~0);" "assume !(0 == ~main_diff_ev~0);" "assume !(0 == ~main_pres_ev~0);" "assume !(0 == ~main_dbl_ev~0);" "assume !(0 == ~main_zero_ev~0);" "assume !(0 == ~main_clk_ev~0);" "assume !(0 == ~main_clk_pos_edge~0);" "assume 0 == ~main_clk_neg_edge~0;~main_clk_neg_edge~0 := 1;" "assume !(1 == ~main_clk_pos_edge~0);" "assume !(1 == ~main_clk_pos_edge~0);" "assume !(1 == ~main_clk_pos_edge~0);" "assume !(1 == ~main_clk_pos_edge~0);" "assume !(1 == ~main_clk_pos_edge~0);" "assume !(1 == ~main_in1_ev~0);" "assume !(1 == ~main_in2_ev~0);" "assume !(1 == ~main_sum_ev~0);" "assume !(1 == ~main_diff_ev~0);" "assume !(1 == ~main_pres_ev~0);" "assume !(1 == ~main_dbl_ev~0);" "assume !(1 == ~main_zero_ev~0);" "assume !(1 == ~main_clk_ev~0);" "assume !(1 == ~main_clk_pos_edge~0);" "assume 1 == ~main_clk_neg_edge~0;~main_clk_neg_edge~0 := 2;" [2024-11-12 21:44:55,798 INFO L749 eck$LassoCheckResult]: Loop: "assume !false;" "start_simulation_~kernel_st~0#1 := 1;assume { :begin_inline_eval } true;havoc eval_#t~nondet4#1, eval_#t~nondet5#1, eval_#t~nondet6#1, eval_#t~nondet7#1, eval_#t~nondet8#1, eval_~tmp~0#1, eval_~tmp___0~0#1, eval_~tmp___1~0#1, eval_~tmp___2~0#1, eval_~tmp___3~0#1;havoc eval_~tmp~0#1;havoc eval_~tmp___0~0#1;havoc eval_~tmp___1~0#1;havoc eval_~tmp___2~0#1;havoc eval_~tmp___3~0#1;" "assume !false;" "assume !(0 == ~N_generate_st~0);" "assume !(0 == ~S1_addsub_st~0);" "assume !(0 == ~S2_presdbl_st~0);" "assume !(0 == ~S3_zero_st~0);" "assume !(0 == ~D_print_st~0);" "havoc eval_#t~nondet4#1, eval_#t~nondet5#1, eval_#t~nondet6#1, eval_#t~nondet7#1, eval_#t~nondet8#1, eval_~tmp~0#1, eval_~tmp___0~0#1, eval_~tmp___1~0#1, eval_~tmp___2~0#1, eval_~tmp___3~0#1;assume { :end_inline_eval } true;start_simulation_~kernel_st~0#1 := 2;" "assume !(1 == ~main_in1_req_up~0);" "assume !(1 == ~main_in2_req_up~0);" "assume !(1 == ~main_sum_req_up~0);" "assume !(1 == ~main_diff_req_up~0);" "assume !(1 == ~main_pres_req_up~0);" "assume !(1 == ~main_dbl_req_up~0);" "assume !(1 == ~main_zero_req_up~0);" "assume !(1 == ~main_clk_req_up~0);" "start_simulation_~kernel_st~0#1 := 3;" "assume !(0 == ~main_in1_ev~0);" "assume !(0 == ~main_in2_ev~0);" "assume 0 == ~main_sum_ev~0;~main_sum_ev~0 := 1;" "assume 0 == ~main_diff_ev~0;~main_diff_ev~0 := 1;" "assume 0 == ~main_pres_ev~0;~main_pres_ev~0 := 1;" "assume !(0 == ~main_dbl_ev~0);" "assume !(0 == ~main_zero_ev~0);" "assume 0 == ~main_clk_ev~0;~main_clk_ev~0 := 1;" "assume !(0 == ~main_clk_pos_edge~0);" "assume 0 == ~main_clk_neg_edge~0;~main_clk_neg_edge~0 := 1;" "assume !(1 == ~main_clk_pos_edge~0);" "assume !(1 == ~main_clk_pos_edge~0);" "assume !(1 == ~main_clk_pos_edge~0);" "assume !(1 == ~main_clk_pos_edge~0);" "assume !(1 == ~main_clk_pos_edge~0);" "assume !(1 == ~main_in1_ev~0);" "assume !(1 == ~main_in2_ev~0);" "assume 1 == ~main_sum_ev~0;~main_sum_ev~0 := 2;" "assume 1 == ~main_diff_ev~0;~main_diff_ev~0 := 2;" "assume 1 == ~main_pres_ev~0;~main_pres_ev~0 := 2;" "assume !(1 == ~main_dbl_ev~0);" "assume !(1 == ~main_zero_ev~0);" "assume 1 == ~main_clk_ev~0;~main_clk_ev~0 := 2;" "assume !(1 == ~main_clk_pos_edge~0);" "assume 1 == ~main_clk_neg_edge~0;~main_clk_neg_edge~0 := 2;" "assume 0 == ~N_generate_st~0;" [2024-11-12 21:44:55,798 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 21:44:55,798 INFO L85 PathProgramCache]: Analyzing trace with hash 1243965239, now seen corresponding path program 1 times [2024-11-12 21:44:55,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 21:44:55,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921314248] [2024-11-12 21:44:55,799 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 21:44:55,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 21:44:55,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 21:44:55,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 21:44:55,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921314248] [2024-11-12 21:44:55,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921314248] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 21:44:55,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666580686] [2024-11-12 21:44:55,857 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 21:44:55,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 21:44:55,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 21:44:55,860 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 21:44:55,861 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-12 21:44:55,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 21:44:55,937 INFO L256 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-12 21:44:55,938 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 21:44:55,969 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 21:44:56,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [666580686] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 21:44:56,005 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 21:44:56,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 6 [2024-11-12 21:44:56,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034368834] [2024-11-12 21:44:56,005 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 21:44:56,006 INFO L752 eck$LassoCheckResult]: stem already infeasible [2024-11-12 21:44:56,006 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 21:44:56,006 INFO L85 PathProgramCache]: Analyzing trace with hash -1332141836, now seen corresponding path program 1 times [2024-11-12 21:44:56,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 21:44:56,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261694466] [2024-11-12 21:44:56,006 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 21:44:56,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 21:44:56,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 21:44:56,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 21:44:56,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261694466] [2024-11-12 21:44:56,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261694466] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 21:44:56,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903454729] [2024-11-12 21:44:56,027 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 21:44:56,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 21:44:56,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 21:44:56,029 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 21:44:56,031 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-12 21:44:56,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 21:44:56,085 INFO L256 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-12 21:44:56,086 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 21:44:56,134 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 21:44:56,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [903454729] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 21:44:56,182 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 21:44:56,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 2 [2024-11-12 21:44:56,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239399359] [2024-11-12 21:44:56,182 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 21:44:56,182 INFO L764 eck$LassoCheckResult]: loop already infeasible [2024-11-12 21:44:56,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 21:44:56,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-12 21:44:56,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-11-12 21:44:56,183 INFO L87 Difference]: Start difference. First operand 56589 states and 89856 transitions. cyclomatic complexity: 33299 Second operand has 6 states, 6 states have (on average 14.666666666666666) internal successors, (88), 6 states have internal predecessors, (88), 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) [2024-11-12 21:44:56,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-12 21:44:56,722 INFO L93 Difference]: Finished difference Result 70881 states and 111257 transitions. [2024-11-12 21:44:56,722 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 70881 states and 111257 transitions. [2024-11-12 21:44:57,016 INFO L131 ngComponentsAnalysis]: Automaton has 32 accepting balls. 68478 [2024-11-12 21:44:57,200 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 70881 states to 70881 states and 111257 transitions. [2024-11-12 21:44:57,200 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 70881 [2024-11-12 21:44:57,247 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 70881 [2024-11-12 21:44:57,248 INFO L73 IsDeterministic]: Start isDeterministic. Operand 70881 states and 111257 transitions. [2024-11-12 21:44:57,326 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2024-11-12 21:44:57,326 INFO L218 hiAutomatonCegarLoop]: Abstraction has 70881 states and 111257 transitions. [2024-11-12 21:44:57,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70881 states and 111257 transitions. [2024-11-12 21:44:58,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70881 to 70241. [2024-11-12 21:44:58,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70241 states, 70241 states have (on average 1.565709485912786) internal successors, (109977), 70240 states have internal predecessors, (109977), 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) [2024-11-12 21:44:58,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70241 states to 70241 states and 109977 transitions. [2024-11-12 21:44:58,368 INFO L240 hiAutomatonCegarLoop]: Abstraction has 70241 states and 109977 transitions. [2024-11-12 21:44:58,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-12 21:44:58,370 INFO L426 stractBuchiCegarLoop]: Abstraction has 70241 states and 109977 transitions. [2024-11-12 21:44:58,370 INFO L333 stractBuchiCegarLoop]: ======== Iteration 10 ============ [2024-11-12 21:44:58,370 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 70241 states and 109977 transitions. [2024-11-12 21:44:58,550 INFO L131 ngComponentsAnalysis]: Automaton has 32 accepting balls. 68158 [2024-11-12 21:44:58,550 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2024-11-12 21:44:58,550 INFO L119 BuchiIsEmpty]: Starting construction of run [2024-11-12 21:44:58,551 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 21:44:58,551 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 21:44:58,551 INFO L747 eck$LassoCheckResult]: Stem: "assume { :begin_inline_ULTIMATE.init } true;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int#0(48, 1, 0, 1);call write~init~int#0(0, 1, 1, 1);call #Ultimate.allocInit(17, 2);call #Ultimate.allocInit(12, 3);~main_in1_val~0 := 0;~main_in1_val_t~0 := 0;~main_in1_ev~0 := 0;~main_in1_req_up~0 := 0;~main_in2_val~0 := 0;~main_in2_val_t~0 := 0;~main_in2_ev~0 := 0;~main_in2_req_up~0 := 0;~main_diff_val~0 := 0;~main_diff_val_t~0 := 0;~main_diff_ev~0 := 0;~main_diff_req_up~0 := 0;~main_sum_val~0 := 0;~main_sum_val_t~0 := 0;~main_sum_ev~0 := 0;~main_sum_req_up~0 := 0;~main_pres_val~0 := 0;~main_pres_val_t~0 := 0;~main_pres_ev~0 := 0;~main_pres_req_up~0 := 0;~main_dbl_val~0 := 0;~main_dbl_val_t~0 := 0;~main_dbl_ev~0 := 0;~main_dbl_req_up~0 := 0;~main_zero_val~0 := 0;~main_zero_val_t~0 := 0;~main_zero_ev~0 := 0;~main_zero_req_up~0 := 0;~main_clk_val~0 := 0;~main_clk_val_t~0 := 0;~main_clk_ev~0 := 0;~main_clk_req_up~0 := 0;~main_clk_pos_edge~0 := 0;~main_clk_neg_edge~0 := 0;~N_generate_st~0 := 0;~N_generate_i~0 := 0;~S1_addsub_st~0 := 0;~S1_addsub_i~0 := 0;~S2_presdbl_st~0 := 0;~S2_presdbl_i~0 := 0;~S3_zero_st~0 := 0;~S3_zero_i~0 := 0;~D_z~0 := 0;~D_print_st~0 := 0;~D_print_i~0 := 0;" "assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_~count~0#1, main_~__retres2~0#1;havoc main_~count~0#1;havoc main_~__retres2~0#1;~main_in1_ev~0 := 2;~main_in1_req_up~0 := 0;~main_in2_ev~0 := 2;~main_in2_req_up~0 := 0;~main_diff_ev~0 := 2;~main_diff_req_up~0 := 0;~main_sum_ev~0 := 2;~main_sum_req_up~0 := 0;~main_pres_ev~0 := 2;~main_pres_req_up~0 := 0;~main_dbl_ev~0 := 2;~main_dbl_req_up~0 := 0;~main_zero_ev~0 := 2;~main_zero_req_up~0 := 0;~main_clk_val~0 := 0;~main_clk_ev~0 := 2;~main_clk_req_up~0 := 0;~main_clk_pos_edge~0 := 2;~main_clk_neg_edge~0 := 2;main_~count~0#1 := 0;~N_generate_i~0 := 0;~S1_addsub_i~0 := 0;~S2_presdbl_i~0 := 0;~S3_zero_i~0 := 0;~D_print_i~0 := 0;assume { :begin_inline_start_simulation } true;havoc start_simulation_~kernel_st~0#1;havoc start_simulation_~kernel_st~0#1;start_simulation_~kernel_st~0#1 := 0;" "assume !(1 == ~main_in1_req_up~0);" "assume !(1 == ~main_in2_req_up~0);" "assume !(1 == ~main_sum_req_up~0);" "assume !(1 == ~main_diff_req_up~0);" "assume !(1 == ~main_pres_req_up~0);" "assume !(1 == ~main_dbl_req_up~0);" "assume !(1 == ~main_zero_req_up~0);" "assume !(1 == ~main_clk_req_up~0);" "assume !(1 == ~N_generate_i~0);~N_generate_st~0 := 2;" "assume !(1 == ~S1_addsub_i~0);~S1_addsub_st~0 := 2;" "assume !(1 == ~S2_presdbl_i~0);~S2_presdbl_st~0 := 2;" "assume !(1 == ~S3_zero_i~0);~S3_zero_st~0 := 2;" "assume !(1 == ~D_print_i~0);~D_print_st~0 := 2;" "assume !(0 == ~main_in1_ev~0);" "assume !(0 == ~main_in2_ev~0);" "assume !(0 == ~main_sum_ev~0);" "assume !(0 == ~main_diff_ev~0);" "assume !(0 == ~main_pres_ev~0);" "assume !(0 == ~main_dbl_ev~0);" "assume !(0 == ~main_zero_ev~0);" "assume !(0 == ~main_clk_ev~0);" "assume !(0 == ~main_clk_pos_edge~0);" "assume !(0 == ~main_clk_neg_edge~0);" "assume !(1 == ~main_clk_pos_edge~0);" "assume !(1 == ~main_clk_pos_edge~0);" "assume !(1 == ~main_clk_pos_edge~0);" "assume !(1 == ~main_clk_pos_edge~0);" "assume !(1 == ~main_clk_pos_edge~0);" "assume !(1 == ~main_in1_ev~0);" "assume !(1 == ~main_in2_ev~0);" "assume !(1 == ~main_sum_ev~0);" "assume !(1 == ~main_diff_ev~0);" "assume !(1 == ~main_pres_ev~0);" "assume !(1 == ~main_dbl_ev~0);" "assume !(1 == ~main_zero_ev~0);" "assume !(1 == ~main_clk_ev~0);" "assume !(1 == ~main_clk_pos_edge~0);" "assume !(1 == ~main_clk_neg_edge~0);" [2024-11-12 21:44:58,551 INFO L749 eck$LassoCheckResult]: Loop: "assume !false;" "start_simulation_~kernel_st~0#1 := 1;assume { :begin_inline_eval } true;havoc eval_#t~nondet4#1, eval_#t~nondet5#1, eval_#t~nondet6#1, eval_#t~nondet7#1, eval_#t~nondet8#1, eval_~tmp~0#1, eval_~tmp___0~0#1, eval_~tmp___1~0#1, eval_~tmp___2~0#1, eval_~tmp___3~0#1;havoc eval_~tmp~0#1;havoc eval_~tmp___0~0#1;havoc eval_~tmp___1~0#1;havoc eval_~tmp___2~0#1;havoc eval_~tmp___3~0#1;" "assume !false;" "assume !(0 == ~N_generate_st~0);" "assume !(0 == ~S1_addsub_st~0);" "assume !(0 == ~S2_presdbl_st~0);" "assume !(0 == ~S3_zero_st~0);" "assume !(0 == ~D_print_st~0);" "havoc eval_#t~nondet4#1, eval_#t~nondet5#1, eval_#t~nondet6#1, eval_#t~nondet7#1, eval_#t~nondet8#1, eval_~tmp~0#1, eval_~tmp___0~0#1, eval_~tmp___1~0#1, eval_~tmp___2~0#1, eval_~tmp___3~0#1;assume { :end_inline_eval } true;start_simulation_~kernel_st~0#1 := 2;" "assume !(1 == ~main_in1_req_up~0);" "assume !(1 == ~main_in2_req_up~0);" "assume !(1 == ~main_sum_req_up~0);" "assume !(1 == ~main_diff_req_up~0);" "assume !(1 == ~main_pres_req_up~0);" "assume !(1 == ~main_dbl_req_up~0);" "assume !(1 == ~main_zero_req_up~0);" "assume !(1 == ~main_clk_req_up~0);" "start_simulation_~kernel_st~0#1 := 3;" "assume !(0 == ~main_in1_ev~0);" "assume !(0 == ~main_in2_ev~0);" "assume 0 == ~main_sum_ev~0;~main_sum_ev~0 := 1;" "assume 0 == ~main_diff_ev~0;~main_diff_ev~0 := 1;" "assume 0 == ~main_pres_ev~0;~main_pres_ev~0 := 1;" "assume !(0 == ~main_dbl_ev~0);" "assume !(0 == ~main_zero_ev~0);" "assume 0 == ~main_clk_ev~0;~main_clk_ev~0 := 1;" "assume !(0 == ~main_clk_pos_edge~0);" "assume !(0 == ~main_clk_neg_edge~0);" "assume !(1 == ~main_clk_pos_edge~0);" "assume !(1 == ~main_clk_pos_edge~0);" "assume !(1 == ~main_clk_pos_edge~0);" "assume !(1 == ~main_clk_pos_edge~0);" "assume !(1 == ~main_clk_pos_edge~0);" "assume !(1 == ~main_in1_ev~0);" "assume !(1 == ~main_in2_ev~0);" "assume 1 == ~main_sum_ev~0;~main_sum_ev~0 := 2;" "assume 1 == ~main_diff_ev~0;~main_diff_ev~0 := 2;" "assume 1 == ~main_pres_ev~0;~main_pres_ev~0 := 2;" "assume !(1 == ~main_dbl_ev~0);" "assume !(1 == ~main_zero_ev~0);" "assume 1 == ~main_clk_ev~0;~main_clk_ev~0 := 2;" "assume !(1 == ~main_clk_pos_edge~0);" "assume !(1 == ~main_clk_neg_edge~0);" "assume 0 == ~N_generate_st~0;" [2024-11-12 21:44:58,551 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 21:44:58,551 INFO L85 PathProgramCache]: Analyzing trace with hash 222896887, now seen corresponding path program 3 times [2024-11-12 21:44:58,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 21:44:58,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071058109] [2024-11-12 21:44:58,552 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 21:44:58,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 21:44:58,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-12 21:44:58,561 INFO L357 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-12 21:44:58,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-12 21:44:58,579 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-12 21:44:58,579 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 21:44:58,579 INFO L85 PathProgramCache]: Analyzing trace with hash 1374477620, now seen corresponding path program 1 times [2024-11-12 21:44:58,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 21:44:58,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465627409] [2024-11-12 21:44:58,580 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 21:44:58,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 21:44:58,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 21:44:58,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 21:44:58,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465627409] [2024-11-12 21:44:58,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465627409] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 21:44:58,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478925814] [2024-11-12 21:44:58,617 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 21:44:58,617 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 21:44:58,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 21:44:58,620 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 21:44:58,622 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-12 21:44:58,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 21:44:58,678 INFO L256 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-12 21:44:58,679 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 21:44:59,046 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 21:44:59,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [478925814] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 21:44:59,105 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 21:44:59,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 2 [2024-11-12 21:44:59,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888952253] [2024-11-12 21:44:59,106 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 21:44:59,106 INFO L764 eck$LassoCheckResult]: loop already infeasible [2024-11-12 21:44:59,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 21:44:59,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-12 21:44:59,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-12 21:44:59,107 INFO L87 Difference]: Start difference. First operand 70241 states and 109977 transitions. cyclomatic complexity: 39768 Second operand has 3 states, 2 states have (on average 22.0) internal successors, (44), 3 states have internal predecessors, (44), 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) [2024-11-12 21:44:59,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-12 21:44:59,365 INFO L93 Difference]: Finished difference Result 94157 states and 145466 transitions. [2024-11-12 21:44:59,365 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 94157 states and 145466 transitions. [2024-11-12 21:45:00,053 INFO L131 ngComponentsAnalysis]: Automaton has 68 accepting balls. 90346 [2024-11-12 21:45:00,328 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 94157 states to 94157 states and 145466 transitions. [2024-11-12 21:45:00,328 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 94157 [2024-11-12 21:45:00,400 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 94157 [2024-11-12 21:45:00,400 INFO L73 IsDeterministic]: Start isDeterministic. Operand 94157 states and 145466 transitions. [2024-11-12 21:45:00,458 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2024-11-12 21:45:00,458 INFO L218 hiAutomatonCegarLoop]: Abstraction has 94157 states and 145466 transitions. [2024-11-12 21:45:00,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94157 states and 145466 transitions. [2024-11-12 21:45:01,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94157 to 94157. [2024-11-12 21:45:01,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94157 states, 94157 states have (on average 1.5449302760283357) internal successors, (145466), 94156 states have internal predecessors, (145466), 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) [2024-11-12 21:45:01,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94157 states to 94157 states and 145466 transitions. [2024-11-12 21:45:01,848 INFO L240 hiAutomatonCegarLoop]: Abstraction has 94157 states and 145466 transitions. [2024-11-12 21:45:01,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-12 21:45:01,849 INFO L426 stractBuchiCegarLoop]: Abstraction has 94157 states and 145466 transitions. [2024-11-12 21:45:01,849 INFO L333 stractBuchiCegarLoop]: ======== Iteration 11 ============ [2024-11-12 21:45:01,849 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 94157 states and 145466 transitions. [2024-11-12 21:45:02,105 INFO L131 ngComponentsAnalysis]: Automaton has 68 accepting balls. 90346 [2024-11-12 21:45:02,105 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2024-11-12 21:45:02,105 INFO L119 BuchiIsEmpty]: Starting construction of run [2024-11-12 21:45:02,106 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 21:45:02,106 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 21:45:02,106 INFO L747 eck$LassoCheckResult]: Stem: "assume { :begin_inline_ULTIMATE.init } true;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int#0(48, 1, 0, 1);call write~init~int#0(0, 1, 1, 1);call #Ultimate.allocInit(17, 2);call #Ultimate.allocInit(12, 3);~main_in1_val~0 := 0;~main_in1_val_t~0 := 0;~main_in1_ev~0 := 0;~main_in1_req_up~0 := 0;~main_in2_val~0 := 0;~main_in2_val_t~0 := 0;~main_in2_ev~0 := 0;~main_in2_req_up~0 := 0;~main_diff_val~0 := 0;~main_diff_val_t~0 := 0;~main_diff_ev~0 := 0;~main_diff_req_up~0 := 0;~main_sum_val~0 := 0;~main_sum_val_t~0 := 0;~main_sum_ev~0 := 0;~main_sum_req_up~0 := 0;~main_pres_val~0 := 0;~main_pres_val_t~0 := 0;~main_pres_ev~0 := 0;~main_pres_req_up~0 := 0;~main_dbl_val~0 := 0;~main_dbl_val_t~0 := 0;~main_dbl_ev~0 := 0;~main_dbl_req_up~0 := 0;~main_zero_val~0 := 0;~main_zero_val_t~0 := 0;~main_zero_ev~0 := 0;~main_zero_req_up~0 := 0;~main_clk_val~0 := 0;~main_clk_val_t~0 := 0;~main_clk_ev~0 := 0;~main_clk_req_up~0 := 0;~main_clk_pos_edge~0 := 0;~main_clk_neg_edge~0 := 0;~N_generate_st~0 := 0;~N_generate_i~0 := 0;~S1_addsub_st~0 := 0;~S1_addsub_i~0 := 0;~S2_presdbl_st~0 := 0;~S2_presdbl_i~0 := 0;~S3_zero_st~0 := 0;~S3_zero_i~0 := 0;~D_z~0 := 0;~D_print_st~0 := 0;~D_print_i~0 := 0;" "assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_~count~0#1, main_~__retres2~0#1;havoc main_~count~0#1;havoc main_~__retres2~0#1;~main_in1_ev~0 := 2;~main_in1_req_up~0 := 0;~main_in2_ev~0 := 2;~main_in2_req_up~0 := 0;~main_diff_ev~0 := 2;~main_diff_req_up~0 := 0;~main_sum_ev~0 := 2;~main_sum_req_up~0 := 0;~main_pres_ev~0 := 2;~main_pres_req_up~0 := 0;~main_dbl_ev~0 := 2;~main_dbl_req_up~0 := 0;~main_zero_ev~0 := 2;~main_zero_req_up~0 := 0;~main_clk_val~0 := 0;~main_clk_ev~0 := 2;~main_clk_req_up~0 := 0;~main_clk_pos_edge~0 := 2;~main_clk_neg_edge~0 := 2;main_~count~0#1 := 0;~N_generate_i~0 := 0;~S1_addsub_i~0 := 0;~S2_presdbl_i~0 := 0;~S3_zero_i~0 := 0;~D_print_i~0 := 0;assume { :begin_inline_start_simulation } true;havoc start_simulation_~kernel_st~0#1;havoc start_simulation_~kernel_st~0#1;start_simulation_~kernel_st~0#1 := 0;" "assume !(1 == ~main_in1_req_up~0);" "assume !(1 == ~main_in2_req_up~0);" "assume !(1 == ~main_sum_req_up~0);" "assume !(1 == ~main_diff_req_up~0);" "assume !(1 == ~main_pres_req_up~0);" "assume !(1 == ~main_dbl_req_up~0);" "assume !(1 == ~main_zero_req_up~0);" "assume !(1 == ~main_clk_req_up~0);" "assume !(1 == ~N_generate_i~0);~N_generate_st~0 := 2;" "assume !(1 == ~S1_addsub_i~0);~S1_addsub_st~0 := 2;" "assume !(1 == ~S2_presdbl_i~0);~S2_presdbl_st~0 := 2;" "assume !(1 == ~S3_zero_i~0);~S3_zero_st~0 := 2;" "assume !(1 == ~D_print_i~0);~D_print_st~0 := 2;" "assume !(0 == ~main_in1_ev~0);" "assume !(0 == ~main_in2_ev~0);" "assume !(0 == ~main_sum_ev~0);" "assume !(0 == ~main_diff_ev~0);" "assume !(0 == ~main_pres_ev~0);" "assume !(0 == ~main_dbl_ev~0);" "assume !(0 == ~main_zero_ev~0);" "assume !(0 == ~main_clk_ev~0);" "assume !(0 == ~main_clk_pos_edge~0);" "assume !(0 == ~main_clk_neg_edge~0);" "assume !(1 == ~main_clk_pos_edge~0);" "assume !(1 == ~main_clk_pos_edge~0);" "assume !(1 == ~main_clk_pos_edge~0);" "assume !(1 == ~main_clk_pos_edge~0);" "assume !(1 == ~main_clk_pos_edge~0);" "assume !(1 == ~main_in1_ev~0);" "assume !(1 == ~main_in2_ev~0);" "assume !(1 == ~main_sum_ev~0);" "assume !(1 == ~main_diff_ev~0);" "assume !(1 == ~main_pres_ev~0);" "assume !(1 == ~main_dbl_ev~0);" "assume !(1 == ~main_zero_ev~0);" "assume !(1 == ~main_clk_ev~0);" "assume !(1 == ~main_clk_pos_edge~0);" "assume !(1 == ~main_clk_neg_edge~0);" [2024-11-12 21:45:02,107 INFO L749 eck$LassoCheckResult]: Loop: "assume !false;" "start_simulation_~kernel_st~0#1 := 1;assume { :begin_inline_eval } true;havoc eval_#t~nondet4#1, eval_#t~nondet5#1, eval_#t~nondet6#1, eval_#t~nondet7#1, eval_#t~nondet8#1, eval_~tmp~0#1, eval_~tmp___0~0#1, eval_~tmp___1~0#1, eval_~tmp___2~0#1, eval_~tmp___3~0#1;havoc eval_~tmp~0#1;havoc eval_~tmp___0~0#1;havoc eval_~tmp___1~0#1;havoc eval_~tmp___2~0#1;havoc eval_~tmp___3~0#1;" "assume !false;" "assume !(0 == ~N_generate_st~0);" "assume !(0 == ~S1_addsub_st~0);" "assume !(0 == ~S2_presdbl_st~0);" "assume !(0 == ~S3_zero_st~0);" "assume !(0 == ~D_print_st~0);" "havoc eval_#t~nondet4#1, eval_#t~nondet5#1, eval_#t~nondet6#1, eval_#t~nondet7#1, eval_#t~nondet8#1, eval_~tmp~0#1, eval_~tmp___0~0#1, eval_~tmp___1~0#1, eval_~tmp___2~0#1, eval_~tmp___3~0#1;assume { :end_inline_eval } true;start_simulation_~kernel_st~0#1 := 2;" "assume !(1 == ~main_in1_req_up~0);" "assume !(1 == ~main_in2_req_up~0);" "assume !(1 == ~main_sum_req_up~0);" "assume !(1 == ~main_diff_req_up~0);" "assume !(1 == ~main_pres_req_up~0);" "assume !(1 == ~main_dbl_req_up~0);" "assume !(1 == ~main_zero_req_up~0);" "assume !(1 == ~main_clk_req_up~0);" "start_simulation_~kernel_st~0#1 := 3;" "assume !(0 == ~main_in1_ev~0);" "assume !(0 == ~main_in2_ev~0);" "assume 0 == ~main_sum_ev~0;~main_sum_ev~0 := 1;" "assume 0 == ~main_diff_ev~0;~main_diff_ev~0 := 1;" "assume 0 == ~main_pres_ev~0;~main_pres_ev~0 := 1;" "assume !(0 == ~main_dbl_ev~0);" "assume !(0 == ~main_zero_ev~0);" "assume 0 == ~main_clk_ev~0;~main_clk_ev~0 := 1;" "assume !(0 == ~main_clk_pos_edge~0);" "assume !(0 == ~main_clk_neg_edge~0);" "assume !(1 == ~main_clk_pos_edge~0);" "assume !(1 == ~main_clk_pos_edge~0);" "assume !(1 == ~main_clk_pos_edge~0);" "assume !(1 == ~main_clk_pos_edge~0);" "assume !(1 == ~main_clk_pos_edge~0);" "assume !(1 == ~main_in1_ev~0);" "assume !(1 == ~main_in2_ev~0);" "assume 1 == ~main_sum_ev~0;~main_sum_ev~0 := 2;" "assume 1 == ~main_diff_ev~0;~main_diff_ev~0 := 2;" "assume 1 == ~main_pres_ev~0;~main_pres_ev~0 := 2;" "assume !(1 == ~main_dbl_ev~0);" "assume !(1 == ~main_zero_ev~0);" "assume 1 == ~main_clk_ev~0;~main_clk_ev~0 := 2;" "assume !(1 == ~main_clk_pos_edge~0);" "assume !(1 == ~main_clk_neg_edge~0);" "assume !(0 == ~N_generate_st~0);" "assume 0 == ~S1_addsub_st~0;" [2024-11-12 21:45:02,107 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 21:45:02,107 INFO L85 PathProgramCache]: Analyzing trace with hash 222896887, now seen corresponding path program 4 times [2024-11-12 21:45:02,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 21:45:02,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498823919] [2024-11-12 21:45:02,108 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 21:45:02,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 21:45:02,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-12 21:45:02,116 INFO L357 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-12 21:45:02,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-12 21:45:02,131 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-12 21:45:02,131 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 21:45:02,131 INFO L85 PathProgramCache]: Analyzing trace with hash -340865996, now seen corresponding path program 1 times [2024-11-12 21:45:02,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 21:45:02,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577138788] [2024-11-12 21:45:02,132 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 21:45:02,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 21:45:02,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 21:45:02,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 21:45:02,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577138788] [2024-11-12 21:45:02,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577138788] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 21:45:02,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620657676] [2024-11-12 21:45:02,155 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 21:45:02,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 21:45:02,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 21:45:02,158 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 21:45:02,159 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-12 21:45:02,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 21:45:02,216 INFO L256 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-12 21:45:02,217 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 21:45:02,261 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 21:45:02,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [620657676] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 21:45:02,311 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 21:45:02,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 2 [2024-11-12 21:45:02,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032998878] [2024-11-12 21:45:02,311 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 21:45:02,311 INFO L764 eck$LassoCheckResult]: loop already infeasible [2024-11-12 21:45:02,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 21:45:02,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-12 21:45:02,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-12 21:45:02,312 INFO L87 Difference]: Start difference. First operand 94157 states and 145466 transitions. cyclomatic complexity: 51377 Second operand has 3 states, 2 states have (on average 22.5) internal successors, (45), 3 states have internal predecessors, (45), 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) [2024-11-12 21:45:03,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-12 21:45:03,177 INFO L93 Difference]: Finished difference Result 138809 states and 211728 transitions. [2024-11-12 21:45:03,177 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 138809 states and 211728 transitions. [2024-11-12 21:45:03,705 INFO L131 ngComponentsAnalysis]: Automaton has 176 accepting balls. 131500 [2024-11-12 21:45:04,573 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 138809 states to 138809 states and 211728 transitions. [2024-11-12 21:45:04,573 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 138809 [2024-11-12 21:45:04,676 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 138809 [2024-11-12 21:45:04,677 INFO L73 IsDeterministic]: Start isDeterministic. Operand 138809 states and 211728 transitions. [2024-11-12 21:45:04,756 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2024-11-12 21:45:04,756 INFO L218 hiAutomatonCegarLoop]: Abstraction has 138809 states and 211728 transitions. [2024-11-12 21:45:04,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138809 states and 211728 transitions. [2024-11-12 21:45:06,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138809 to 138809. [2024-11-12 21:45:06,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138809 states, 138809 states have (on average 1.5253189634677866) internal successors, (211728), 138808 states have internal predecessors, (211728), 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) [2024-11-12 21:45:06,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138809 states to 138809 states and 211728 transitions. [2024-11-12 21:45:06,572 INFO L240 hiAutomatonCegarLoop]: Abstraction has 138809 states and 211728 transitions. [2024-11-12 21:45:06,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-12 21:45:06,573 INFO L426 stractBuchiCegarLoop]: Abstraction has 138809 states and 211728 transitions. [2024-11-12 21:45:06,573 INFO L333 stractBuchiCegarLoop]: ======== Iteration 12 ============ [2024-11-12 21:45:06,573 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 138809 states and 211728 transitions. [2024-11-12 21:45:07,641 INFO L131 ngComponentsAnalysis]: Automaton has 176 accepting balls. 131500 [2024-11-12 21:45:07,641 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2024-11-12 21:45:07,641 INFO L119 BuchiIsEmpty]: Starting construction of run [2024-11-12 21:45:07,642 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 21:45:07,642 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 21:45:07,642 INFO L747 eck$LassoCheckResult]: Stem: "assume { :begin_inline_ULTIMATE.init } true;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int#0(48, 1, 0, 1);call write~init~int#0(0, 1, 1, 1);call #Ultimate.allocInit(17, 2);call #Ultimate.allocInit(12, 3);~main_in1_val~0 := 0;~main_in1_val_t~0 := 0;~main_in1_ev~0 := 0;~main_in1_req_up~0 := 0;~main_in2_val~0 := 0;~main_in2_val_t~0 := 0;~main_in2_ev~0 := 0;~main_in2_req_up~0 := 0;~main_diff_val~0 := 0;~main_diff_val_t~0 := 0;~main_diff_ev~0 := 0;~main_diff_req_up~0 := 0;~main_sum_val~0 := 0;~main_sum_val_t~0 := 0;~main_sum_ev~0 := 0;~main_sum_req_up~0 := 0;~main_pres_val~0 := 0;~main_pres_val_t~0 := 0;~main_pres_ev~0 := 0;~main_pres_req_up~0 := 0;~main_dbl_val~0 := 0;~main_dbl_val_t~0 := 0;~main_dbl_ev~0 := 0;~main_dbl_req_up~0 := 0;~main_zero_val~0 := 0;~main_zero_val_t~0 := 0;~main_zero_ev~0 := 0;~main_zero_req_up~0 := 0;~main_clk_val~0 := 0;~main_clk_val_t~0 := 0;~main_clk_ev~0 := 0;~main_clk_req_up~0 := 0;~main_clk_pos_edge~0 := 0;~main_clk_neg_edge~0 := 0;~N_generate_st~0 := 0;~N_generate_i~0 := 0;~S1_addsub_st~0 := 0;~S1_addsub_i~0 := 0;~S2_presdbl_st~0 := 0;~S2_presdbl_i~0 := 0;~S3_zero_st~0 := 0;~S3_zero_i~0 := 0;~D_z~0 := 0;~D_print_st~0 := 0;~D_print_i~0 := 0;" "assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_~count~0#1, main_~__retres2~0#1;havoc main_~count~0#1;havoc main_~__retres2~0#1;~main_in1_ev~0 := 2;~main_in1_req_up~0 := 0;~main_in2_ev~0 := 2;~main_in2_req_up~0 := 0;~main_diff_ev~0 := 2;~main_diff_req_up~0 := 0;~main_sum_ev~0 := 2;~main_sum_req_up~0 := 0;~main_pres_ev~0 := 2;~main_pres_req_up~0 := 0;~main_dbl_ev~0 := 2;~main_dbl_req_up~0 := 0;~main_zero_ev~0 := 2;~main_zero_req_up~0 := 0;~main_clk_val~0 := 0;~main_clk_ev~0 := 2;~main_clk_req_up~0 := 0;~main_clk_pos_edge~0 := 2;~main_clk_neg_edge~0 := 2;main_~count~0#1 := 0;~N_generate_i~0 := 0;~S1_addsub_i~0 := 0;~S2_presdbl_i~0 := 0;~S3_zero_i~0 := 0;~D_print_i~0 := 0;assume { :begin_inline_start_simulation } true;havoc start_simulation_~kernel_st~0#1;havoc start_simulation_~kernel_st~0#1;start_simulation_~kernel_st~0#1 := 0;" "assume !(1 == ~main_in1_req_up~0);" "assume !(1 == ~main_in2_req_up~0);" "assume !(1 == ~main_sum_req_up~0);" "assume !(1 == ~main_diff_req_up~0);" "assume !(1 == ~main_pres_req_up~0);" "assume !(1 == ~main_dbl_req_up~0);" "assume !(1 == ~main_zero_req_up~0);" "assume !(1 == ~main_clk_req_up~0);" "assume !(1 == ~N_generate_i~0);~N_generate_st~0 := 2;" "assume !(1 == ~S1_addsub_i~0);~S1_addsub_st~0 := 2;" "assume !(1 == ~S2_presdbl_i~0);~S2_presdbl_st~0 := 2;" "assume !(1 == ~S3_zero_i~0);~S3_zero_st~0 := 2;" "assume !(1 == ~D_print_i~0);~D_print_st~0 := 2;" "assume !(0 == ~main_in1_ev~0);" "assume !(0 == ~main_in2_ev~0);" "assume !(0 == ~main_sum_ev~0);" "assume !(0 == ~main_diff_ev~0);" "assume !(0 == ~main_pres_ev~0);" "assume !(0 == ~main_dbl_ev~0);" "assume !(0 == ~main_zero_ev~0);" "assume !(0 == ~main_clk_ev~0);" "assume !(0 == ~main_clk_pos_edge~0);" "assume !(0 == ~main_clk_neg_edge~0);" "assume !(1 == ~main_clk_pos_edge~0);" "assume !(1 == ~main_clk_pos_edge~0);" "assume !(1 == ~main_clk_pos_edge~0);" "assume !(1 == ~main_clk_pos_edge~0);" "assume !(1 == ~main_clk_pos_edge~0);" "assume !(1 == ~main_in1_ev~0);" "assume !(1 == ~main_in2_ev~0);" "assume !(1 == ~main_sum_ev~0);" "assume !(1 == ~main_diff_ev~0);" "assume !(1 == ~main_pres_ev~0);" "assume !(1 == ~main_dbl_ev~0);" "assume !(1 == ~main_zero_ev~0);" "assume !(1 == ~main_clk_ev~0);" "assume !(1 == ~main_clk_pos_edge~0);" "assume !(1 == ~main_clk_neg_edge~0);" [2024-11-12 21:45:07,642 INFO L749 eck$LassoCheckResult]: Loop: "assume !false;" "start_simulation_~kernel_st~0#1 := 1;assume { :begin_inline_eval } true;havoc eval_#t~nondet4#1, eval_#t~nondet5#1, eval_#t~nondet6#1, eval_#t~nondet7#1, eval_#t~nondet8#1, eval_~tmp~0#1, eval_~tmp___0~0#1, eval_~tmp___1~0#1, eval_~tmp___2~0#1, eval_~tmp___3~0#1;havoc eval_~tmp~0#1;havoc eval_~tmp___0~0#1;havoc eval_~tmp___1~0#1;havoc eval_~tmp___2~0#1;havoc eval_~tmp___3~0#1;" "assume !false;" "assume !(0 == ~N_generate_st~0);" "assume !(0 == ~S1_addsub_st~0);" "assume !(0 == ~S2_presdbl_st~0);" "assume !(0 == ~S3_zero_st~0);" "assume !(0 == ~D_print_st~0);" "havoc eval_#t~nondet4#1, eval_#t~nondet5#1, eval_#t~nondet6#1, eval_#t~nondet7#1, eval_#t~nondet8#1, eval_~tmp~0#1, eval_~tmp___0~0#1, eval_~tmp___1~0#1, eval_~tmp___2~0#1, eval_~tmp___3~0#1;assume { :end_inline_eval } true;start_simulation_~kernel_st~0#1 := 2;" "assume !(1 == ~main_in1_req_up~0);" "assume !(1 == ~main_in2_req_up~0);" "assume !(1 == ~main_sum_req_up~0);" "assume !(1 == ~main_diff_req_up~0);" "assume !(1 == ~main_pres_req_up~0);" "assume !(1 == ~main_dbl_req_up~0);" "assume !(1 == ~main_zero_req_up~0);" "assume !(1 == ~main_clk_req_up~0);" "start_simulation_~kernel_st~0#1 := 3;" "assume !(0 == ~main_in1_ev~0);" "assume !(0 == ~main_in2_ev~0);" "assume 0 == ~main_sum_ev~0;~main_sum_ev~0 := 1;" "assume 0 == ~main_diff_ev~0;~main_diff_ev~0 := 1;" "assume 0 == ~main_pres_ev~0;~main_pres_ev~0 := 1;" "assume !(0 == ~main_dbl_ev~0);" "assume !(0 == ~main_zero_ev~0);" "assume 0 == ~main_clk_ev~0;~main_clk_ev~0 := 1;" "assume !(0 == ~main_clk_pos_edge~0);" "assume !(0 == ~main_clk_neg_edge~0);" "assume !(1 == ~main_clk_pos_edge~0);" "assume !(1 == ~main_clk_pos_edge~0);" "assume !(1 == ~main_clk_pos_edge~0);" "assume !(1 == ~main_clk_pos_edge~0);" "assume !(1 == ~main_clk_pos_edge~0);" "assume !(1 == ~main_in1_ev~0);" "assume !(1 == ~main_in2_ev~0);" "assume 1 == ~main_sum_ev~0;~main_sum_ev~0 := 2;" "assume 1 == ~main_diff_ev~0;~main_diff_ev~0 := 2;" "assume 1 == ~main_pres_ev~0;~main_pres_ev~0 := 2;" "assume !(1 == ~main_dbl_ev~0);" "assume !(1 == ~main_zero_ev~0);" "assume 1 == ~main_clk_ev~0;~main_clk_ev~0 := 2;" "assume !(1 == ~main_clk_pos_edge~0);" "assume !(1 == ~main_clk_neg_edge~0);" "assume !(0 == ~N_generate_st~0);" "assume !(0 == ~S1_addsub_st~0);" "assume 0 == ~S2_presdbl_st~0;" [2024-11-12 21:45:07,642 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 21:45:07,643 INFO L85 PathProgramCache]: Analyzing trace with hash 222896887, now seen corresponding path program 5 times [2024-11-12 21:45:07,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 21:45:07,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565405489] [2024-11-12 21:45:07,643 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 21:45:07,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 21:45:07,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-12 21:45:07,652 INFO L357 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-12 21:45:07,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-12 21:45:07,665 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-12 21:45:07,665 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 21:45:07,666 INFO L85 PathProgramCache]: Analyzing trace with hash -1976910535, now seen corresponding path program 1 times [2024-11-12 21:45:07,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 21:45:07,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017297291] [2024-11-12 21:45:07,666 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 21:45:07,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 21:45:07,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 21:45:07,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 21:45:07,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017297291] [2024-11-12 21:45:07,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017297291] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 21:45:07,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527973089] [2024-11-12 21:45:07,692 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 21:45:07,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 21:45:07,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 21:45:07,696 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 21:45:07,703 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-12 21:45:07,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 21:45:07,760 INFO L256 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-12 21:45:07,761 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 21:45:07,809 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 21:45:07,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [527973089] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 21:45:07,857 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 21:45:07,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 2 [2024-11-12 21:45:07,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712224659] [2024-11-12 21:45:07,858 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 21:45:07,858 INFO L764 eck$LassoCheckResult]: loop already infeasible [2024-11-12 21:45:07,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 21:45:07,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-12 21:45:07,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-12 21:45:07,859 INFO L87 Difference]: Start difference. First operand 138809 states and 211728 transitions. cyclomatic complexity: 73095 Second operand has 3 states, 2 states have (on average 23.0) internal successors, (46), 3 states have internal predecessors, (46), 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) [2024-11-12 21:45:08,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-12 21:45:08,238 INFO L93 Difference]: Finished difference Result 146867 states and 222379 transitions. [2024-11-12 21:45:08,238 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 146867 states and 222379 transitions. [2024-11-12 21:45:09,417 INFO L131 ngComponentsAnalysis]: Automaton has 176 accepting balls. 139360 [2024-11-12 21:45:09,659 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 146867 states to 146867 states and 222379 transitions. [2024-11-12 21:45:09,659 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 146867 [2024-11-12 21:45:09,721 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 146867 [2024-11-12 21:45:09,721 INFO L73 IsDeterministic]: Start isDeterministic. Operand 146867 states and 222379 transitions. [2024-11-12 21:45:09,779 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2024-11-12 21:45:09,779 INFO L218 hiAutomatonCegarLoop]: Abstraction has 146867 states and 222379 transitions. [2024-11-12 21:45:09,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146867 states and 222379 transitions. [2024-11-12 21:45:11,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146867 to 146867. [2024-11-12 21:45:11,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146867 states, 146867 states have (on average 1.5141522602082156) internal successors, (222379), 146866 states have internal predecessors, (222379), 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) [2024-11-12 21:45:11,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146867 states to 146867 states and 222379 transitions. [2024-11-12 21:45:11,457 INFO L240 hiAutomatonCegarLoop]: Abstraction has 146867 states and 222379 transitions. [2024-11-12 21:45:12,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-12 21:45:12,036 INFO L426 stractBuchiCegarLoop]: Abstraction has 146867 states and 222379 transitions. [2024-11-12 21:45:12,037 INFO L333 stractBuchiCegarLoop]: ======== Iteration 13 ============ [2024-11-12 21:45:12,037 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 146867 states and 222379 transitions. [2024-11-12 21:45:12,553 INFO L131 ngComponentsAnalysis]: Automaton has 176 accepting balls. 139360 [2024-11-12 21:45:12,553 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2024-11-12 21:45:12,553 INFO L119 BuchiIsEmpty]: Starting construction of run [2024-11-12 21:45:12,554 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 21:45:12,554 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 21:45:12,554 INFO L747 eck$LassoCheckResult]: Stem: "assume { :begin_inline_ULTIMATE.init } true;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int#0(48, 1, 0, 1);call write~init~int#0(0, 1, 1, 1);call #Ultimate.allocInit(17, 2);call #Ultimate.allocInit(12, 3);~main_in1_val~0 := 0;~main_in1_val_t~0 := 0;~main_in1_ev~0 := 0;~main_in1_req_up~0 := 0;~main_in2_val~0 := 0;~main_in2_val_t~0 := 0;~main_in2_ev~0 := 0;~main_in2_req_up~0 := 0;~main_diff_val~0 := 0;~main_diff_val_t~0 := 0;~main_diff_ev~0 := 0;~main_diff_req_up~0 := 0;~main_sum_val~0 := 0;~main_sum_val_t~0 := 0;~main_sum_ev~0 := 0;~main_sum_req_up~0 := 0;~main_pres_val~0 := 0;~main_pres_val_t~0 := 0;~main_pres_ev~0 := 0;~main_pres_req_up~0 := 0;~main_dbl_val~0 := 0;~main_dbl_val_t~0 := 0;~main_dbl_ev~0 := 0;~main_dbl_req_up~0 := 0;~main_zero_val~0 := 0;~main_zero_val_t~0 := 0;~main_zero_ev~0 := 0;~main_zero_req_up~0 := 0;~main_clk_val~0 := 0;~main_clk_val_t~0 := 0;~main_clk_ev~0 := 0;~main_clk_req_up~0 := 0;~main_clk_pos_edge~0 := 0;~main_clk_neg_edge~0 := 0;~N_generate_st~0 := 0;~N_generate_i~0 := 0;~S1_addsub_st~0 := 0;~S1_addsub_i~0 := 0;~S2_presdbl_st~0 := 0;~S2_presdbl_i~0 := 0;~S3_zero_st~0 := 0;~S3_zero_i~0 := 0;~D_z~0 := 0;~D_print_st~0 := 0;~D_print_i~0 := 0;" "assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_~count~0#1, main_~__retres2~0#1;havoc main_~count~0#1;havoc main_~__retres2~0#1;~main_in1_ev~0 := 2;~main_in1_req_up~0 := 0;~main_in2_ev~0 := 2;~main_in2_req_up~0 := 0;~main_diff_ev~0 := 2;~main_diff_req_up~0 := 0;~main_sum_ev~0 := 2;~main_sum_req_up~0 := 0;~main_pres_ev~0 := 2;~main_pres_req_up~0 := 0;~main_dbl_ev~0 := 2;~main_dbl_req_up~0 := 0;~main_zero_ev~0 := 2;~main_zero_req_up~0 := 0;~main_clk_val~0 := 0;~main_clk_ev~0 := 2;~main_clk_req_up~0 := 0;~main_clk_pos_edge~0 := 2;~main_clk_neg_edge~0 := 2;main_~count~0#1 := 0;~N_generate_i~0 := 0;~S1_addsub_i~0 := 0;~S2_presdbl_i~0 := 0;~S3_zero_i~0 := 0;~D_print_i~0 := 0;assume { :begin_inline_start_simulation } true;havoc start_simulation_~kernel_st~0#1;havoc start_simulation_~kernel_st~0#1;start_simulation_~kernel_st~0#1 := 0;" "assume !(1 == ~main_in1_req_up~0);" "assume !(1 == ~main_in2_req_up~0);" "assume !(1 == ~main_sum_req_up~0);" "assume !(1 == ~main_diff_req_up~0);" "assume !(1 == ~main_pres_req_up~0);" "assume !(1 == ~main_dbl_req_up~0);" "assume !(1 == ~main_zero_req_up~0);" "assume !(1 == ~main_clk_req_up~0);" "assume !(1 == ~N_generate_i~0);~N_generate_st~0 := 2;" "assume !(1 == ~S1_addsub_i~0);~S1_addsub_st~0 := 2;" "assume !(1 == ~S2_presdbl_i~0);~S2_presdbl_st~0 := 2;" "assume !(1 == ~S3_zero_i~0);~S3_zero_st~0 := 2;" "assume !(1 == ~D_print_i~0);~D_print_st~0 := 2;" "assume !(0 == ~main_in1_ev~0);" "assume !(0 == ~main_in2_ev~0);" "assume !(0 == ~main_sum_ev~0);" "assume !(0 == ~main_diff_ev~0);" "assume !(0 == ~main_pres_ev~0);" "assume !(0 == ~main_dbl_ev~0);" "assume !(0 == ~main_zero_ev~0);" "assume !(0 == ~main_clk_ev~0);" "assume !(0 == ~main_clk_pos_edge~0);" "assume !(0 == ~main_clk_neg_edge~0);" "assume !(1 == ~main_clk_pos_edge~0);" "assume !(1 == ~main_clk_pos_edge~0);" "assume !(1 == ~main_clk_pos_edge~0);" "assume !(1 == ~main_clk_pos_edge~0);" "assume !(1 == ~main_clk_pos_edge~0);" "assume !(1 == ~main_in1_ev~0);" "assume !(1 == ~main_in2_ev~0);" "assume !(1 == ~main_sum_ev~0);" "assume !(1 == ~main_diff_ev~0);" "assume !(1 == ~main_pres_ev~0);" "assume !(1 == ~main_dbl_ev~0);" "assume !(1 == ~main_zero_ev~0);" "assume !(1 == ~main_clk_ev~0);" "assume !(1 == ~main_clk_pos_edge~0);" "assume !(1 == ~main_clk_neg_edge~0);" [2024-11-12 21:45:12,554 INFO L749 eck$LassoCheckResult]: Loop: "assume !false;" "start_simulation_~kernel_st~0#1 := 1;assume { :begin_inline_eval } true;havoc eval_#t~nondet4#1, eval_#t~nondet5#1, eval_#t~nondet6#1, eval_#t~nondet7#1, eval_#t~nondet8#1, eval_~tmp~0#1, eval_~tmp___0~0#1, eval_~tmp___1~0#1, eval_~tmp___2~0#1, eval_~tmp___3~0#1;havoc eval_~tmp~0#1;havoc eval_~tmp___0~0#1;havoc eval_~tmp___1~0#1;havoc eval_~tmp___2~0#1;havoc eval_~tmp___3~0#1;" "assume !false;" "assume !(0 == ~N_generate_st~0);" "assume !(0 == ~S1_addsub_st~0);" "assume !(0 == ~S2_presdbl_st~0);" "assume !(0 == ~S3_zero_st~0);" "assume !(0 == ~D_print_st~0);" "havoc eval_#t~nondet4#1, eval_#t~nondet5#1, eval_#t~nondet6#1, eval_#t~nondet7#1, eval_#t~nondet8#1, eval_~tmp~0#1, eval_~tmp___0~0#1, eval_~tmp___1~0#1, eval_~tmp___2~0#1, eval_~tmp___3~0#1;assume { :end_inline_eval } true;start_simulation_~kernel_st~0#1 := 2;" "assume !(1 == ~main_in1_req_up~0);" "assume !(1 == ~main_in2_req_up~0);" "assume !(1 == ~main_sum_req_up~0);" "assume !(1 == ~main_diff_req_up~0);" "assume !(1 == ~main_pres_req_up~0);" "assume !(1 == ~main_dbl_req_up~0);" "assume !(1 == ~main_zero_req_up~0);" "assume !(1 == ~main_clk_req_up~0);" "start_simulation_~kernel_st~0#1 := 3;" "assume !(0 == ~main_in1_ev~0);" "assume !(0 == ~main_in2_ev~0);" "assume 0 == ~main_sum_ev~0;~main_sum_ev~0 := 1;" "assume 0 == ~main_diff_ev~0;~main_diff_ev~0 := 1;" "assume 0 == ~main_pres_ev~0;~main_pres_ev~0 := 1;" "assume !(0 == ~main_dbl_ev~0);" "assume !(0 == ~main_zero_ev~0);" "assume 0 == ~main_clk_ev~0;~main_clk_ev~0 := 1;" "assume !(0 == ~main_clk_pos_edge~0);" "assume !(0 == ~main_clk_neg_edge~0);" "assume !(1 == ~main_clk_pos_edge~0);" "assume !(1 == ~main_clk_pos_edge~0);" "assume !(1 == ~main_clk_pos_edge~0);" "assume !(1 == ~main_clk_pos_edge~0);" "assume !(1 == ~main_clk_pos_edge~0);" "assume !(1 == ~main_in1_ev~0);" "assume !(1 == ~main_in2_ev~0);" "assume 1 == ~main_sum_ev~0;~main_sum_ev~0 := 2;" "assume 1 == ~main_diff_ev~0;~main_diff_ev~0 := 2;" "assume 1 == ~main_pres_ev~0;~main_pres_ev~0 := 2;" "assume !(1 == ~main_dbl_ev~0);" "assume !(1 == ~main_zero_ev~0);" "assume 1 == ~main_clk_ev~0;~main_clk_ev~0 := 2;" "assume !(1 == ~main_clk_pos_edge~0);" "assume !(1 == ~main_clk_neg_edge~0);" "assume !(0 == ~N_generate_st~0);" "assume !(0 == ~S1_addsub_st~0);" "assume !(0 == ~S2_presdbl_st~0);" "assume 0 == ~S3_zero_st~0;" [2024-11-12 21:45:12,554 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 21:45:12,554 INFO L85 PathProgramCache]: Analyzing trace with hash 222896887, now seen corresponding path program 6 times [2024-11-12 21:45:12,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 21:45:12,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124692791] [2024-11-12 21:45:12,555 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 21:45:12,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 21:45:12,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-12 21:45:12,566 INFO L357 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-12 21:45:12,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-12 21:45:12,580 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-12 21:45:12,581 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 21:45:12,581 INFO L85 PathProgramCache]: Analyzing trace with hash -1154683687, now seen corresponding path program 1 times [2024-11-12 21:45:12,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 21:45:12,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721277131] [2024-11-12 21:45:12,581 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 21:45:12,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 21:45:12,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 21:45:12,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 21:45:12,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721277131] [2024-11-12 21:45:12,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721277131] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 21:45:12,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426193209] [2024-11-12 21:45:12,608 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 21:45:12,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 21:45:12,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 21:45:12,611 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 21:45:12,613 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-12 21:45:12,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 21:45:12,672 INFO L256 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-12 21:45:12,673 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 21:45:12,723 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 21:45:12,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1426193209] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 21:45:12,776 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 21:45:12,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 2 [2024-11-12 21:45:12,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437650970] [2024-11-12 21:45:12,776 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 21:45:12,776 INFO L764 eck$LassoCheckResult]: loop already infeasible [2024-11-12 21:45:12,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 21:45:12,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-12 21:45:12,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-12 21:45:12,777 INFO L87 Difference]: Start difference. First operand 146867 states and 222379 transitions. cyclomatic complexity: 75688 Second operand has 3 states, 2 states have (on average 23.5) internal successors, (47), 3 states have internal predecessors, (47), 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) [2024-11-12 21:45:13,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-12 21:45:13,443 INFO L93 Difference]: Finished difference Result 233593 states and 349794 transitions. [2024-11-12 21:45:13,443 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 233593 states and 349794 transitions. [2024-11-12 21:45:15,212 INFO L131 ngComponentsAnalysis]: Automaton has 392 accepting balls. 218832 [2024-11-12 21:45:15,722 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 233593 states to 233593 states and 349794 transitions. [2024-11-12 21:45:15,723 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 233593 [2024-11-12 21:45:15,851 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 233593 [2024-11-12 21:45:15,852 INFO L73 IsDeterministic]: Start isDeterministic. Operand 233593 states and 349794 transitions. [2024-11-12 21:45:15,958 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2024-11-12 21:45:15,958 INFO L218 hiAutomatonCegarLoop]: Abstraction has 233593 states and 349794 transitions. [2024-11-12 21:45:16,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233593 states and 349794 transitions. [2024-11-12 21:45:18,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233593 to 233593. [2024-11-12 21:45:18,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233593 states, 233593 states have (on average 1.4974506941560748) internal successors, (349794), 233592 states have internal predecessors, (349794), 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) [2024-11-12 21:45:19,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233593 states to 233593 states and 349794 transitions. [2024-11-12 21:45:19,495 INFO L240 hiAutomatonCegarLoop]: Abstraction has 233593 states and 349794 transitions. [2024-11-12 21:45:19,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-12 21:45:19,497 INFO L426 stractBuchiCegarLoop]: Abstraction has 233593 states and 349794 transitions. [2024-11-12 21:45:19,497 INFO L333 stractBuchiCegarLoop]: ======== Iteration 14 ============ [2024-11-12 21:45:19,497 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 233593 states and 349794 transitions. [2024-11-12 21:45:20,327 INFO L131 ngComponentsAnalysis]: Automaton has 392 accepting balls. 218832 [2024-11-12 21:45:20,327 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2024-11-12 21:45:20,327 INFO L119 BuchiIsEmpty]: Starting construction of run [2024-11-12 21:45:20,328 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 21:45:20,328 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 21:45:20,328 INFO L747 eck$LassoCheckResult]: Stem: "assume { :begin_inline_ULTIMATE.init } true;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int#0(48, 1, 0, 1);call write~init~int#0(0, 1, 1, 1);call #Ultimate.allocInit(17, 2);call #Ultimate.allocInit(12, 3);~main_in1_val~0 := 0;~main_in1_val_t~0 := 0;~main_in1_ev~0 := 0;~main_in1_req_up~0 := 0;~main_in2_val~0 := 0;~main_in2_val_t~0 := 0;~main_in2_ev~0 := 0;~main_in2_req_up~0 := 0;~main_diff_val~0 := 0;~main_diff_val_t~0 := 0;~main_diff_ev~0 := 0;~main_diff_req_up~0 := 0;~main_sum_val~0 := 0;~main_sum_val_t~0 := 0;~main_sum_ev~0 := 0;~main_sum_req_up~0 := 0;~main_pres_val~0 := 0;~main_pres_val_t~0 := 0;~main_pres_ev~0 := 0;~main_pres_req_up~0 := 0;~main_dbl_val~0 := 0;~main_dbl_val_t~0 := 0;~main_dbl_ev~0 := 0;~main_dbl_req_up~0 := 0;~main_zero_val~0 := 0;~main_zero_val_t~0 := 0;~main_zero_ev~0 := 0;~main_zero_req_up~0 := 0;~main_clk_val~0 := 0;~main_clk_val_t~0 := 0;~main_clk_ev~0 := 0;~main_clk_req_up~0 := 0;~main_clk_pos_edge~0 := 0;~main_clk_neg_edge~0 := 0;~N_generate_st~0 := 0;~N_generate_i~0 := 0;~S1_addsub_st~0 := 0;~S1_addsub_i~0 := 0;~S2_presdbl_st~0 := 0;~S2_presdbl_i~0 := 0;~S3_zero_st~0 := 0;~S3_zero_i~0 := 0;~D_z~0 := 0;~D_print_st~0 := 0;~D_print_i~0 := 0;" "assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_~count~0#1, main_~__retres2~0#1;havoc main_~count~0#1;havoc main_~__retres2~0#1;~main_in1_ev~0 := 2;~main_in1_req_up~0 := 0;~main_in2_ev~0 := 2;~main_in2_req_up~0 := 0;~main_diff_ev~0 := 2;~main_diff_req_up~0 := 0;~main_sum_ev~0 := 2;~main_sum_req_up~0 := 0;~main_pres_ev~0 := 2;~main_pres_req_up~0 := 0;~main_dbl_ev~0 := 2;~main_dbl_req_up~0 := 0;~main_zero_ev~0 := 2;~main_zero_req_up~0 := 0;~main_clk_val~0 := 0;~main_clk_ev~0 := 2;~main_clk_req_up~0 := 0;~main_clk_pos_edge~0 := 2;~main_clk_neg_edge~0 := 2;main_~count~0#1 := 0;~N_generate_i~0 := 0;~S1_addsub_i~0 := 0;~S2_presdbl_i~0 := 0;~S3_zero_i~0 := 0;~D_print_i~0 := 0;assume { :begin_inline_start_simulation } true;havoc start_simulation_~kernel_st~0#1;havoc start_simulation_~kernel_st~0#1;start_simulation_~kernel_st~0#1 := 0;" "assume !(1 == ~main_in1_req_up~0);" "assume !(1 == ~main_in2_req_up~0);" "assume !(1 == ~main_sum_req_up~0);" "assume !(1 == ~main_diff_req_up~0);" "assume !(1 == ~main_pres_req_up~0);" "assume !(1 == ~main_dbl_req_up~0);" "assume !(1 == ~main_zero_req_up~0);" "assume !(1 == ~main_clk_req_up~0);" "assume !(1 == ~N_generate_i~0);~N_generate_st~0 := 2;" "assume !(1 == ~S1_addsub_i~0);~S1_addsub_st~0 := 2;" "assume !(1 == ~S2_presdbl_i~0);~S2_presdbl_st~0 := 2;" "assume !(1 == ~S3_zero_i~0);~S3_zero_st~0 := 2;" "assume !(1 == ~D_print_i~0);~D_print_st~0 := 2;" "assume !(0 == ~main_in1_ev~0);" "assume !(0 == ~main_in2_ev~0);" "assume !(0 == ~main_sum_ev~0);" "assume !(0 == ~main_diff_ev~0);" "assume !(0 == ~main_pres_ev~0);" "assume !(0 == ~main_dbl_ev~0);" "assume !(0 == ~main_zero_ev~0);" "assume !(0 == ~main_clk_ev~0);" "assume !(0 == ~main_clk_pos_edge~0);" "assume !(0 == ~main_clk_neg_edge~0);" "assume !(1 == ~main_clk_pos_edge~0);" "assume !(1 == ~main_clk_pos_edge~0);" "assume !(1 == ~main_clk_pos_edge~0);" "assume !(1 == ~main_clk_pos_edge~0);" "assume !(1 == ~main_clk_pos_edge~0);" "assume !(1 == ~main_in1_ev~0);" "assume !(1 == ~main_in2_ev~0);" "assume !(1 == ~main_sum_ev~0);" "assume !(1 == ~main_diff_ev~0);" "assume !(1 == ~main_pres_ev~0);" "assume !(1 == ~main_dbl_ev~0);" "assume !(1 == ~main_zero_ev~0);" "assume !(1 == ~main_clk_ev~0);" "assume !(1 == ~main_clk_pos_edge~0);" "assume !(1 == ~main_clk_neg_edge~0);" [2024-11-12 21:45:20,328 INFO L749 eck$LassoCheckResult]: Loop: "assume !false;" "start_simulation_~kernel_st~0#1 := 1;assume { :begin_inline_eval } true;havoc eval_#t~nondet4#1, eval_#t~nondet5#1, eval_#t~nondet6#1, eval_#t~nondet7#1, eval_#t~nondet8#1, eval_~tmp~0#1, eval_~tmp___0~0#1, eval_~tmp___1~0#1, eval_~tmp___2~0#1, eval_~tmp___3~0#1;havoc eval_~tmp~0#1;havoc eval_~tmp___0~0#1;havoc eval_~tmp___1~0#1;havoc eval_~tmp___2~0#1;havoc eval_~tmp___3~0#1;" "assume !false;" "assume !(0 == ~N_generate_st~0);" "assume !(0 == ~S1_addsub_st~0);" "assume !(0 == ~S2_presdbl_st~0);" "assume !(0 == ~S3_zero_st~0);" "assume !(0 == ~D_print_st~0);" "havoc eval_#t~nondet4#1, eval_#t~nondet5#1, eval_#t~nondet6#1, eval_#t~nondet7#1, eval_#t~nondet8#1, eval_~tmp~0#1, eval_~tmp___0~0#1, eval_~tmp___1~0#1, eval_~tmp___2~0#1, eval_~tmp___3~0#1;assume { :end_inline_eval } true;start_simulation_~kernel_st~0#1 := 2;" "assume !(1 == ~main_in1_req_up~0);" "assume !(1 == ~main_in2_req_up~0);" "assume !(1 == ~main_sum_req_up~0);" "assume !(1 == ~main_diff_req_up~0);" "assume !(1 == ~main_pres_req_up~0);" "assume !(1 == ~main_dbl_req_up~0);" "assume !(1 == ~main_zero_req_up~0);" "assume !(1 == ~main_clk_req_up~0);" "start_simulation_~kernel_st~0#1 := 3;" "assume !(0 == ~main_in1_ev~0);" "assume !(0 == ~main_in2_ev~0);" "assume 0 == ~main_sum_ev~0;~main_sum_ev~0 := 1;" "assume 0 == ~main_diff_ev~0;~main_diff_ev~0 := 1;" "assume 0 == ~main_pres_ev~0;~main_pres_ev~0 := 1;" "assume !(0 == ~main_dbl_ev~0);" "assume !(0 == ~main_zero_ev~0);" "assume 0 == ~main_clk_ev~0;~main_clk_ev~0 := 1;" "assume !(0 == ~main_clk_pos_edge~0);" "assume !(0 == ~main_clk_neg_edge~0);" "assume !(1 == ~main_clk_pos_edge~0);" "assume !(1 == ~main_clk_pos_edge~0);" "assume !(1 == ~main_clk_pos_edge~0);" "assume !(1 == ~main_clk_pos_edge~0);" "assume !(1 == ~main_clk_pos_edge~0);" "assume !(1 == ~main_in1_ev~0);" "assume !(1 == ~main_in2_ev~0);" "assume 1 == ~main_sum_ev~0;~main_sum_ev~0 := 2;" "assume 1 == ~main_diff_ev~0;~main_diff_ev~0 := 2;" "assume 1 == ~main_pres_ev~0;~main_pres_ev~0 := 2;" "assume !(1 == ~main_dbl_ev~0);" "assume !(1 == ~main_zero_ev~0);" "assume 1 == ~main_clk_ev~0;~main_clk_ev~0 := 2;" "assume !(1 == ~main_clk_pos_edge~0);" "assume !(1 == ~main_clk_neg_edge~0);" "assume !(0 == ~N_generate_st~0);" "assume !(0 == ~S1_addsub_st~0);" "assume !(0 == ~S2_presdbl_st~0);" "assume !(0 == ~S3_zero_st~0);" "assume 0 == ~D_print_st~0;" [2024-11-12 21:45:20,329 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 21:45:20,329 INFO L85 PathProgramCache]: Analyzing trace with hash 222896887, now seen corresponding path program 7 times [2024-11-12 21:45:20,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 21:45:20,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411749268] [2024-11-12 21:45:20,329 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 21:45:20,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 21:45:20,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-12 21:45:20,338 INFO L357 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-12 21:45:20,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-12 21:45:20,349 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-12 21:45:20,349 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 21:45:20,349 INFO L85 PathProgramCache]: Analyzing trace with hash -1435455170, now seen corresponding path program 1 times [2024-11-12 21:45:20,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 21:45:20,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521428817] [2024-11-12 21:45:20,350 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 21:45:20,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 21:45:20,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 21:45:20,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 21:45:20,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521428817] [2024-11-12 21:45:20,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521428817] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 21:45:20,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257112701] [2024-11-12 21:45:20,373 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 21:45:20,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 21:45:20,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 21:45:20,376 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 21:45:20,377 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-12 21:45:20,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 21:45:20,439 INFO L256 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-12 21:45:20,440 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 21:45:20,490 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 21:45:20,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [257112701] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 21:45:20,541 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 21:45:20,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 2 [2024-11-12 21:45:20,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548202535] [2024-11-12 21:45:20,541 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 21:45:20,542 INFO L764 eck$LassoCheckResult]: loop already infeasible [2024-11-12 21:45:20,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 21:45:20,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-12 21:45:20,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-12 21:45:20,542 INFO L87 Difference]: Start difference. First operand 233593 states and 349794 transitions. cyclomatic complexity: 116593 Second operand has 3 states, 2 states have (on average 24.0) internal successors, (48), 3 states have internal predecessors, (48), 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) [2024-11-12 21:45:22,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-12 21:45:22,342 INFO L93 Difference]: Finished difference Result 394991 states and 582772 transitions. [2024-11-12 21:45:22,342 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 394991 states and 582772 transitions. [2024-11-12 21:45:24,747 INFO L131 ngComponentsAnalysis]: Automaton has 816 accepting balls. 355788 [2024-11-12 21:45:25,492 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 394991 states to 394991 states and 582772 transitions. [2024-11-12 21:45:25,492 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 394991 [2024-11-12 21:45:25,691 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 394991 [2024-11-12 21:45:25,691 INFO L73 IsDeterministic]: Start isDeterministic. Operand 394991 states and 582772 transitions. [2024-11-12 21:45:25,862 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2024-11-12 21:45:25,862 INFO L218 hiAutomatonCegarLoop]: Abstraction has 394991 states and 582772 transitions. [2024-11-12 21:45:26,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394991 states and 582772 transitions.