./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe001_power.opt_pso.oepc_pso.opt_rmo.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/safe001_power.opt_pso.oepc_pso.opt_rmo.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb4cb34f Calling Ultimate with: /root/.sdkman/candidates/java/current/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/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe001_power.opt_pso.oepc_pso.opt_rmo.opt.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/safe001_power.opt_pso.oepc_pso.opt_rmo.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-eb4cb34-m [2024-06-21 19:21:31,677 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-21 19:21:31,760 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-21 19:21:31,766 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-21 19:21:31,766 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-21 19:21:31,787 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-21 19:21:31,788 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-21 19:21:31,788 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-21 19:21:31,789 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-21 19:21:31,792 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-21 19:21:31,792 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-21 19:21:31,792 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-21 19:21:31,793 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-21 19:21:31,794 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-21 19:21:31,794 INFO L153 SettingsManager]: * Use SBE=true [2024-06-21 19:21:31,794 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-21 19:21:31,795 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-21 19:21:31,795 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-21 19:21:31,795 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-21 19:21:31,795 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-21 19:21:31,795 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-21 19:21:31,796 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-21 19:21:31,796 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-21 19:21:31,796 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-21 19:21:31,796 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-21 19:21:31,797 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-21 19:21:31,797 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-21 19:21:31,797 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-21 19:21:31,797 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-21 19:21:31,798 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-21 19:21:31,798 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-21 19:21:31,799 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-21 19:21:31,799 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 19:21:31,799 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-21 19:21:31,799 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-21 19:21:31,799 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-21 19:21:31,799 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-21 19:21:31,800 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-21 19:21:31,800 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-21 19:21:31,800 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-21 19:21:31,800 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-21 19:21:31,800 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-21 19:21:31,801 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-21 19:21:31,801 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-21 19:21:32,013 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-21 19:21:32,027 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-21 19:21:32,031 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-21 19:21:32,031 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-21 19:21:32,032 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-21 19:21:32,033 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/safe001_power.opt_pso.oepc_pso.opt_rmo.opt.yml/witness.yml [2024-06-21 19:21:32,144 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-21 19:21:32,144 INFO L274 PluginConnector]: CDTParser initialized [2024-06-21 19:21:32,145 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe001_power.opt_pso.oepc_pso.opt_rmo.opt.i [2024-06-21 19:21:33,145 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-21 19:21:33,362 INFO L384 CDTParser]: Found 1 translation units. [2024-06-21 19:21:33,365 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe001_power.opt_pso.oepc_pso.opt_rmo.opt.i [2024-06-21 19:21:33,376 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/090211e3f/2c6e33cc61a0453dacf7fa77d7bcdcc7/FLAG0cb9d1e6c [2024-06-21 19:21:33,386 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/090211e3f/2c6e33cc61a0453dacf7fa77d7bcdcc7 [2024-06-21 19:21:33,386 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-21 19:21:33,387 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-21 19:21:33,388 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-21 19:21:33,388 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-21 19:21:33,392 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-21 19:21:33,397 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 07:21:32" (1/2) ... [2024-06-21 19:21:33,398 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@270cfb33 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 07:21:33, skipping insertion in model container [2024-06-21 19:21:33,398 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 07:21:32" (1/2) ... [2024-06-21 19:21:33,399 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@8c959a9 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 07:21:33, skipping insertion in model container [2024-06-21 19:21:33,399 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 07:21:33" (2/2) ... [2024-06-21 19:21:33,400 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@270cfb33 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 07:21:33, skipping insertion in model container [2024-06-21 19:21:33,400 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 07:21:33" (2/2) ... [2024-06-21 19:21:33,400 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-21 19:21:33,425 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-21 19:21:33,426 INFO L97 edCorrectnessWitness]: Location invariant before [L821-L821] ! multithreaded || ((((((((((((((0LL - (long long )x$r_buff0_thd2) + (long long )x$w_buff0 >= 0LL && (0LL - (long long )x$r_buff1_thd2) + (long long )x$w_buff0 >= 0LL) && (0LL - (long long )x$r_buff1_thd2) + (long long )x$w_buff1 >= 0LL) && (1LL - (long long )x) + (long long )x$r_buff0_thd2 >= 0LL) && (1LL - (long long )x) + (long long )x$w_buff0 >= 0LL) && (long long )x$r_buff0_thd2 - (long long )x$r_buff1_thd2 >= 0LL) && (long long )x$r_buff0_thd2 - (long long )x$w_buff0_used >= 0LL) && (long long )x$r_buff0_thd2 - (long long )x$w_buff1_used >= 0LL) && (long long )x$r_buff1_thd2 - (long long )x$w_buff1_used >= 0LL) && (long long )x$w_buff0 - (long long )x$w_buff0_used >= 0LL) && (long long )x$w_buff0 - (long long )x$w_buff1 >= 0LL) && (long long )x$w_buff0 - (long long )x$w_buff1_used >= 0LL) && (long long )x$w_buff0_used - (long long )x$w_buff1_used >= 0LL) && (long long )x$w_buff1 - (long long )x$w_buff1_used >= 0LL) [2024-06-21 19:21:33,426 INFO L97 edCorrectnessWitness]: Location invariant before [L824-L824] ! multithreaded || ((((((((((((((0LL - (long long )x$r_buff0_thd2) + (long long )x$w_buff0 >= 0LL && (0LL - (long long )x$r_buff1_thd2) + (long long )x$w_buff0 >= 0LL) && (0LL - (long long )x$r_buff1_thd2) + (long long )x$w_buff1 >= 0LL) && (1LL - (long long )x) + (long long )x$r_buff0_thd2 >= 0LL) && (1LL - (long long )x) + (long long )x$w_buff0 >= 0LL) && (long long )x$r_buff0_thd2 - (long long )x$r_buff1_thd2 >= 0LL) && (long long )x$r_buff0_thd2 - (long long )x$w_buff0_used >= 0LL) && (long long )x$r_buff0_thd2 - (long long )x$w_buff1_used >= 0LL) && (long long )x$r_buff1_thd2 - (long long )x$w_buff1_used >= 0LL) && (long long )x$w_buff0 - (long long )x$w_buff0_used >= 0LL) && (long long )x$w_buff0 - (long long )x$w_buff1 >= 0LL) && (long long )x$w_buff0 - (long long )x$w_buff1_used >= 0LL) && (long long )x$w_buff0_used - (long long )x$w_buff1_used >= 0LL) && (long long )x$w_buff1 - (long long )x$w_buff1_used >= 0LL) [2024-06-21 19:21:33,426 INFO L97 edCorrectnessWitness]: Location invariant before [L823-L823] ! multithreaded || ((((((((((((((0LL - (long long )x$r_buff0_thd2) + (long long )x$w_buff0 >= 0LL && (0LL - (long long )x$r_buff1_thd2) + (long long )x$w_buff0 >= 0LL) && (0LL - (long long )x$r_buff1_thd2) + (long long )x$w_buff1 >= 0LL) && (1LL - (long long )x) + (long long )x$r_buff0_thd2 >= 0LL) && (1LL - (long long )x) + (long long )x$w_buff0 >= 0LL) && (long long )x$r_buff0_thd2 - (long long )x$r_buff1_thd2 >= 0LL) && (long long )x$r_buff0_thd2 - (long long )x$w_buff0_used >= 0LL) && (long long )x$r_buff0_thd2 - (long long )x$w_buff1_used >= 0LL) && (long long )x$r_buff1_thd2 - (long long )x$w_buff1_used >= 0LL) && (long long )x$w_buff0 - (long long )x$w_buff0_used >= 0LL) && (long long )x$w_buff0 - (long long )x$w_buff1 >= 0LL) && (long long )x$w_buff0 - (long long )x$w_buff1_used >= 0LL) && (long long )x$w_buff0_used - (long long )x$w_buff1_used >= 0LL) && (long long )x$w_buff1 - (long long )x$w_buff1_used >= 0LL) [2024-06-21 19:21:33,426 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-21 19:21:33,427 INFO L106 edCorrectnessWitness]: ghost_update [L819-L819] multithreaded = 1; [2024-06-21 19:21:33,457 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-21 19:21:33,687 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 19:21:33,696 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-21 19:21:33,793 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 19:21:33,829 INFO L206 MainTranslator]: Completed translation [2024-06-21 19:21:33,830 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 07:21:33 WrapperNode [2024-06-21 19:21:33,830 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-21 19:21:33,831 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-21 19:21:33,831 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-21 19:21:33,831 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-21 19:21:33,846 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 07:21:33" (1/1) ... [2024-06-21 19:21:33,863 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 07:21:33" (1/1) ... [2024-06-21 19:21:33,897 INFO L138 Inliner]: procedures = 175, calls = 43, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 143 [2024-06-21 19:21:33,897 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-21 19:21:33,898 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-21 19:21:33,898 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-21 19:21:33,898 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-21 19:21:33,906 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 07:21:33" (1/1) ... [2024-06-21 19:21:33,907 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 07:21:33" (1/1) ... [2024-06-21 19:21:33,911 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 07:21:33" (1/1) ... [2024-06-21 19:21:33,924 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]. [2024-06-21 19:21:33,924 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 07:21:33" (1/1) ... [2024-06-21 19:21:33,925 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 07:21:33" (1/1) ... [2024-06-21 19:21:33,930 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 07:21:33" (1/1) ... [2024-06-21 19:21:33,932 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 07:21:33" (1/1) ... [2024-06-21 19:21:33,933 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 07:21:33" (1/1) ... [2024-06-21 19:21:33,934 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 07:21:33" (1/1) ... [2024-06-21 19:21:33,937 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-21 19:21:33,938 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-21 19:21:33,938 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-21 19:21:33,938 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-21 19:21:33,939 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 07:21:33" (1/1) ... [2024-06-21 19:21:33,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 19:21:33,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-21 19:21:34,001 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-21 19:21:34,040 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-21 19:21:34,055 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-21 19:21:34,055 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-21 19:21:34,056 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-21 19:21:34,056 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-21 19:21:34,056 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-21 19:21:34,056 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-21 19:21:34,056 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-21 19:21:34,057 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-21 19:21:34,057 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-21 19:21:34,057 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-21 19:21:34,057 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-21 19:21:34,058 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-21 19:21:34,059 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-21 19:21:34,178 INFO L244 CfgBuilder]: Building ICFG [2024-06-21 19:21:34,180 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-21 19:21:34,485 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-21 19:21:34,485 INFO L293 CfgBuilder]: Performing block encoding [2024-06-21 19:21:34,663 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-21 19:21:34,663 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-21 19:21:34,664 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 07:21:34 BoogieIcfgContainer [2024-06-21 19:21:34,664 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-21 19:21:34,666 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-21 19:21:34,666 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-21 19:21:34,669 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-21 19:21:34,669 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 07:21:32" (1/4) ... [2024-06-21 19:21:34,669 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40604083 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 07:21:34, skipping insertion in model container [2024-06-21 19:21:34,670 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.06 07:21:33" (2/4) ... [2024-06-21 19:21:34,670 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40604083 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 07:21:34, skipping insertion in model container [2024-06-21 19:21:34,670 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 07:21:33" (3/4) ... [2024-06-21 19:21:34,672 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40604083 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 07:21:34, skipping insertion in model container [2024-06-21 19:21:34,672 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 07:21:34" (4/4) ... [2024-06-21 19:21:34,675 INFO L112 eAbstractionObserver]: Analyzing ICFG safe001_power.opt_pso.oepc_pso.opt_rmo.opt.i [2024-06-21 19:21:34,688 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-21 19:21:34,688 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-21 19:21:34,688 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-21 19:21:34,733 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-21 19:21:34,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 50 places, 40 transitions, 92 flow [2024-06-21 19:21:34,792 INFO L124 PetriNetUnfolderBase]: 0/37 cut-off events. [2024-06-21 19:21:34,792 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 19:21:34,794 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47 conditions, 37 events. 0/37 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 63 event pairs, 0 based on Foata normal form. 0/34 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-21 19:21:34,794 INFO L82 GeneralOperation]: Start removeDead. Operand has 50 places, 40 transitions, 92 flow [2024-06-21 19:21:34,797 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 41 places, 31 transitions, 71 flow [2024-06-21 19:21:34,810 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-21 19:21:34,816 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@454565ff, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-21 19:21:34,816 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-21 19:21:34,821 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-21 19:21:34,822 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-21 19:21:34,822 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 19:21:34,822 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:21:34,823 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-21 19:21:34,823 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:21:34,831 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:21:34,831 INFO L85 PathProgramCache]: Analyzing trace with hash 368623954, now seen corresponding path program 1 times [2024-06-21 19:21:34,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:21:34,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561492988] [2024-06-21 19:21:34,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:21:34,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:21:35,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:21:35,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:21:35,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:21:35,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561492988] [2024-06-21 19:21:35,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561492988] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:21:35,302 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:21:35,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-21 19:21:35,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768702227] [2024-06-21 19:21:35,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:21:35,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-21 19:21:35,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:21:35,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-21 19:21:35,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-21 19:21:35,344 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 40 [2024-06-21 19:21:35,346 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 31 transitions, 71 flow. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 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) [2024-06-21 19:21:35,346 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:21:35,346 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 40 [2024-06-21 19:21:35,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:21:35,506 INFO L124 PetriNetUnfolderBase]: 362/676 cut-off events. [2024-06-21 19:21:35,506 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2024-06-21 19:21:35,511 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1305 conditions, 676 events. 362/676 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 3672 event pairs, 216 based on Foata normal form. 3/646 useless extension candidates. Maximal degree in co-relation 1293. Up to 568 conditions per place. [2024-06-21 19:21:35,516 INFO L140 encePairwiseOnDemand]: 34/40 looper letters, 28 selfloop transitions, 3 changer transitions 0/42 dead transitions. [2024-06-21 19:21:35,517 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 42 transitions, 161 flow [2024-06-21 19:21:35,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 19:21:35,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 19:21:35,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 82 transitions. [2024-06-21 19:21:35,527 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6833333333333333 [2024-06-21 19:21:35,528 INFO L175 Difference]: Start difference. First operand has 41 places, 31 transitions, 71 flow. Second operand 3 states and 82 transitions. [2024-06-21 19:21:35,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 42 transitions, 161 flow [2024-06-21 19:21:35,530 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 42 transitions, 156 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-21 19:21:35,532 INFO L231 Difference]: Finished difference. Result has 41 places, 33 transitions, 91 flow [2024-06-21 19:21:35,534 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=91, PETRI_PLACES=41, PETRI_TRANSITIONS=33} [2024-06-21 19:21:35,537 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 0 predicate places. [2024-06-21 19:21:35,538 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 33 transitions, 91 flow [2024-06-21 19:21:35,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 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) [2024-06-21 19:21:35,538 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:21:35,538 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:21:35,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-21 19:21:35,539 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:21:35,539 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:21:35,539 INFO L85 PathProgramCache]: Analyzing trace with hash -554505855, now seen corresponding path program 1 times [2024-06-21 19:21:35,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:21:35,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751470269] [2024-06-21 19:21:35,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:21:35,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:21:35,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:21:35,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:21:35,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:21:35,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751470269] [2024-06-21 19:21:35,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751470269] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:21:35,802 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:21:35,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 19:21:35,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626942060] [2024-06-21 19:21:35,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:21:35,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 19:21:35,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:21:35,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 19:21:35,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-21 19:21:35,820 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 40 [2024-06-21 19:21:35,821 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 33 transitions, 91 flow. Second operand has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 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) [2024-06-21 19:21:35,822 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:21:35,822 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 40 [2024-06-21 19:21:35,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:21:35,948 INFO L124 PetriNetUnfolderBase]: 334/621 cut-off events. [2024-06-21 19:21:35,949 INFO L125 PetriNetUnfolderBase]: For 118/118 co-relation queries the response was YES. [2024-06-21 19:21:35,950 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1363 conditions, 621 events. 334/621 cut-off events. For 118/118 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 3145 event pairs, 77 based on Foata normal form. 15/624 useless extension candidates. Maximal degree in co-relation 1351. Up to 450 conditions per place. [2024-06-21 19:21:35,952 INFO L140 encePairwiseOnDemand]: 34/40 looper letters, 34 selfloop transitions, 4 changer transitions 0/49 dead transitions. [2024-06-21 19:21:35,952 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 49 transitions, 203 flow [2024-06-21 19:21:35,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 19:21:35,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 19:21:35,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 105 transitions. [2024-06-21 19:21:35,956 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.65625 [2024-06-21 19:21:35,956 INFO L175 Difference]: Start difference. First operand has 41 places, 33 transitions, 91 flow. Second operand 4 states and 105 transitions. [2024-06-21 19:21:35,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 49 transitions, 203 flow [2024-06-21 19:21:35,967 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 49 transitions, 200 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-21 19:21:35,969 INFO L231 Difference]: Finished difference. Result has 43 places, 32 transitions, 98 flow [2024-06-21 19:21:35,969 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=98, PETRI_PLACES=43, PETRI_TRANSITIONS=32} [2024-06-21 19:21:35,970 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 2 predicate places. [2024-06-21 19:21:35,970 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 32 transitions, 98 flow [2024-06-21 19:21:35,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 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) [2024-06-21 19:21:35,971 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:21:35,971 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:21:35,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-21 19:21:35,973 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:21:35,974 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:21:35,974 INFO L85 PathProgramCache]: Analyzing trace with hash -546325912, now seen corresponding path program 1 times [2024-06-21 19:21:35,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:21:35,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695400603] [2024-06-21 19:21:35,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:21:35,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:21:36,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:21:36,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:21:36,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:21:36,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695400603] [2024-06-21 19:21:36,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695400603] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:21:36,253 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:21:36,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 19:21:36,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401702212] [2024-06-21 19:21:36,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:21:36,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 19:21:36,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:21:36,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 19:21:36,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-21 19:21:36,264 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 40 [2024-06-21 19:21:36,265 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 32 transitions, 98 flow. Second operand has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 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) [2024-06-21 19:21:36,266 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:21:36,266 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 40 [2024-06-21 19:21:36,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:21:36,369 INFO L124 PetriNetUnfolderBase]: 329/625 cut-off events. [2024-06-21 19:21:36,370 INFO L125 PetriNetUnfolderBase]: For 291/291 co-relation queries the response was YES. [2024-06-21 19:21:36,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1458 conditions, 625 events. 329/625 cut-off events. For 291/291 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 3336 event pairs, 177 based on Foata normal form. 2/621 useless extension candidates. Maximal degree in co-relation 1444. Up to 515 conditions per place. [2024-06-21 19:21:36,374 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 31 selfloop transitions, 7 changer transitions 0/49 dead transitions. [2024-06-21 19:21:36,374 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 49 transitions, 225 flow [2024-06-21 19:21:36,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 19:21:36,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 19:21:36,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 102 transitions. [2024-06-21 19:21:36,379 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6375 [2024-06-21 19:21:36,379 INFO L175 Difference]: Start difference. First operand has 43 places, 32 transitions, 98 flow. Second operand 4 states and 102 transitions. [2024-06-21 19:21:36,379 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 49 transitions, 225 flow [2024-06-21 19:21:36,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 49 transitions, 214 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-06-21 19:21:36,382 INFO L231 Difference]: Finished difference. Result has 46 places, 38 transitions, 146 flow [2024-06-21 19:21:36,382 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=146, PETRI_PLACES=46, PETRI_TRANSITIONS=38} [2024-06-21 19:21:36,383 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 5 predicate places. [2024-06-21 19:21:36,383 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 38 transitions, 146 flow [2024-06-21 19:21:36,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 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) [2024-06-21 19:21:36,383 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:21:36,383 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:21:36,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-21 19:21:36,384 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:21:36,384 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:21:36,384 INFO L85 PathProgramCache]: Analyzing trace with hash -1033138233, now seen corresponding path program 1 times [2024-06-21 19:21:36,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:21:36,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119219023] [2024-06-21 19:21:36,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:21:36,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:21:36,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:21:36,838 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:21:36,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:21:36,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119219023] [2024-06-21 19:21:36,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119219023] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:21:36,842 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:21:36,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 19:21:36,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969814801] [2024-06-21 19:21:36,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:21:36,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 19:21:36,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:21:36,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 19:21:36,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-06-21 19:21:36,857 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 40 [2024-06-21 19:21:36,858 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 38 transitions, 146 flow. Second operand has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 states have internal predecessors, (89), 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) [2024-06-21 19:21:36,858 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:21:36,859 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 40 [2024-06-21 19:21:36,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:21:37,044 INFO L124 PetriNetUnfolderBase]: 493/985 cut-off events. [2024-06-21 19:21:37,044 INFO L125 PetriNetUnfolderBase]: For 740/748 co-relation queries the response was YES. [2024-06-21 19:21:37,046 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2397 conditions, 985 events. 493/985 cut-off events. For 740/748 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 5840 event pairs, 102 based on Foata normal form. 34/1002 useless extension candidates. Maximal degree in co-relation 2381. Up to 375 conditions per place. [2024-06-21 19:21:37,050 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 47 selfloop transitions, 10 changer transitions 0/68 dead transitions. [2024-06-21 19:21:37,050 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 68 transitions, 354 flow [2024-06-21 19:21:37,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 19:21:37,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 19:21:37,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 132 transitions. [2024-06-21 19:21:37,052 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.66 [2024-06-21 19:21:37,052 INFO L175 Difference]: Start difference. First operand has 46 places, 38 transitions, 146 flow. Second operand 5 states and 132 transitions. [2024-06-21 19:21:37,052 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 68 transitions, 354 flow [2024-06-21 19:21:37,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 68 transitions, 352 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-06-21 19:21:37,057 INFO L231 Difference]: Finished difference. Result has 52 places, 42 transitions, 203 flow [2024-06-21 19:21:37,057 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=203, PETRI_PLACES=52, PETRI_TRANSITIONS=42} [2024-06-21 19:21:37,058 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 11 predicate places. [2024-06-21 19:21:37,058 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 42 transitions, 203 flow [2024-06-21 19:21:37,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 states have internal predecessors, (89), 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) [2024-06-21 19:21:37,059 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:21:37,059 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:21:37,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-21 19:21:37,059 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:21:37,060 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:21:37,060 INFO L85 PathProgramCache]: Analyzing trace with hash -1036702745, now seen corresponding path program 1 times [2024-06-21 19:21:37,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:21:37,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585539966] [2024-06-21 19:21:37,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:21:37,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:21:37,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:21:37,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:21:37,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:21:37,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585539966] [2024-06-21 19:21:37,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585539966] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:21:37,239 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:21:37,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 19:21:37,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157159741] [2024-06-21 19:21:37,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:21:37,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 19:21:37,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:21:37,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 19:21:37,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-21 19:21:37,268 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 40 [2024-06-21 19:21:37,268 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 42 transitions, 203 flow. Second operand has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 states have internal predecessors, (89), 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) [2024-06-21 19:21:37,268 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:21:37,268 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 40 [2024-06-21 19:21:37,269 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:21:37,420 INFO L124 PetriNetUnfolderBase]: 520/1009 cut-off events. [2024-06-21 19:21:37,420 INFO L125 PetriNetUnfolderBase]: For 1435/1478 co-relation queries the response was YES. [2024-06-21 19:21:37,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2991 conditions, 1009 events. 520/1009 cut-off events. For 1435/1478 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 5910 event pairs, 127 based on Foata normal form. 17/1011 useless extension candidates. Maximal degree in co-relation 2971. Up to 746 conditions per place. [2024-06-21 19:21:37,427 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 46 selfloop transitions, 11 changer transitions 1/69 dead transitions. [2024-06-21 19:21:37,427 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 69 transitions, 412 flow [2024-06-21 19:21:37,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 19:21:37,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 19:21:37,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 129 transitions. [2024-06-21 19:21:37,428 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.645 [2024-06-21 19:21:37,428 INFO L175 Difference]: Start difference. First operand has 52 places, 42 transitions, 203 flow. Second operand 5 states and 129 transitions. [2024-06-21 19:21:37,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 69 transitions, 412 flow [2024-06-21 19:21:37,436 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 69 transitions, 396 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-21 19:21:37,437 INFO L231 Difference]: Finished difference. Result has 56 places, 47 transitions, 260 flow [2024-06-21 19:21:37,437 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=260, PETRI_PLACES=56, PETRI_TRANSITIONS=47} [2024-06-21 19:21:37,437 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 15 predicate places. [2024-06-21 19:21:37,438 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 47 transitions, 260 flow [2024-06-21 19:21:37,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 states have internal predecessors, (89), 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) [2024-06-21 19:21:37,438 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:21:37,438 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:21:37,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-21 19:21:37,438 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:21:37,439 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:21:37,439 INFO L85 PathProgramCache]: Analyzing trace with hash -1962758695, now seen corresponding path program 2 times [2024-06-21 19:21:37,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:21:37,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886796337] [2024-06-21 19:21:37,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:21:37,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:21:37,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:21:37,581 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:21:37,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:21:37,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886796337] [2024-06-21 19:21:37,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886796337] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:21:37,582 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:21:37,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 19:21:37,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941485467] [2024-06-21 19:21:37,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:21:37,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 19:21:37,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:21:37,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 19:21:37,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-21 19:21:37,596 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 40 [2024-06-21 19:21:37,596 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 47 transitions, 260 flow. Second operand has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 states have internal predecessors, (89), 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) [2024-06-21 19:21:37,597 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:21:37,597 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 40 [2024-06-21 19:21:37,597 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:21:37,818 INFO L124 PetriNetUnfolderBase]: 513/1011 cut-off events. [2024-06-21 19:21:37,818 INFO L125 PetriNetUnfolderBase]: For 2082/2159 co-relation queries the response was YES. [2024-06-21 19:21:37,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3201 conditions, 1011 events. 513/1011 cut-off events. For 2082/2159 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 5953 event pairs, 122 based on Foata normal form. 19/1014 useless extension candidates. Maximal degree in co-relation 3179. Up to 631 conditions per place. [2024-06-21 19:21:37,824 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 44 selfloop transitions, 17 changer transitions 0/72 dead transitions. [2024-06-21 19:21:37,824 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 72 transitions, 492 flow [2024-06-21 19:21:37,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 19:21:37,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 19:21:37,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 130 transitions. [2024-06-21 19:21:37,826 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.65 [2024-06-21 19:21:37,826 INFO L175 Difference]: Start difference. First operand has 56 places, 47 transitions, 260 flow. Second operand 5 states and 130 transitions. [2024-06-21 19:21:37,826 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 72 transitions, 492 flow [2024-06-21 19:21:37,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 72 transitions, 478 flow, removed 4 selfloop flow, removed 1 redundant places. [2024-06-21 19:21:37,831 INFO L231 Difference]: Finished difference. Result has 61 places, 51 transitions, 336 flow [2024-06-21 19:21:37,831 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=246, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=336, PETRI_PLACES=61, PETRI_TRANSITIONS=51} [2024-06-21 19:21:37,833 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 20 predicate places. [2024-06-21 19:21:37,833 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 51 transitions, 336 flow [2024-06-21 19:21:37,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 states have internal predecessors, (89), 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) [2024-06-21 19:21:37,833 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:21:37,833 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:21:37,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-21 19:21:37,834 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:21:37,834 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:21:37,834 INFO L85 PathProgramCache]: Analyzing trace with hash -2037036400, now seen corresponding path program 1 times [2024-06-21 19:21:37,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:21:37,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805846229] [2024-06-21 19:21:37,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:21:37,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:21:37,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:21:38,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:21:38,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:21:38,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805846229] [2024-06-21 19:21:38,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805846229] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:21:38,089 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:21:38,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:21:38,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379295962] [2024-06-21 19:21:38,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:21:38,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:21:38,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:21:38,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:21:38,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:21:38,113 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 19:21:38,114 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 51 transitions, 336 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 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) [2024-06-21 19:21:38,114 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:21:38,114 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 19:21:38,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:21:38,330 INFO L124 PetriNetUnfolderBase]: 600/1176 cut-off events. [2024-06-21 19:21:38,330 INFO L125 PetriNetUnfolderBase]: For 3803/3874 co-relation queries the response was YES. [2024-06-21 19:21:38,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4076 conditions, 1176 events. 600/1176 cut-off events. For 3803/3874 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 7194 event pairs, 127 based on Foata normal form. 32/1190 useless extension candidates. Maximal degree in co-relation 4050. Up to 769 conditions per place. [2024-06-21 19:21:38,337 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 61 selfloop transitions, 20 changer transitions 3/94 dead transitions. [2024-06-21 19:21:38,337 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 94 transitions, 678 flow [2024-06-21 19:21:38,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:21:38,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:21:38,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-21 19:21:38,338 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5964285714285714 [2024-06-21 19:21:38,339 INFO L175 Difference]: Start difference. First operand has 61 places, 51 transitions, 336 flow. Second operand 7 states and 167 transitions. [2024-06-21 19:21:38,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 94 transitions, 678 flow [2024-06-21 19:21:38,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 94 transitions, 628 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-21 19:21:38,347 INFO L231 Difference]: Finished difference. Result has 66 places, 59 transitions, 413 flow [2024-06-21 19:21:38,347 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=296, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=413, PETRI_PLACES=66, PETRI_TRANSITIONS=59} [2024-06-21 19:21:38,347 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 25 predicate places. [2024-06-21 19:21:38,347 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 59 transitions, 413 flow [2024-06-21 19:21:38,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 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) [2024-06-21 19:21:38,348 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:21:38,348 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:21:38,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-21 19:21:38,348 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:21:38,348 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:21:38,349 INFO L85 PathProgramCache]: Analyzing trace with hash 53461030, now seen corresponding path program 2 times [2024-06-21 19:21:38,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:21:38,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469349529] [2024-06-21 19:21:38,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:21:38,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:21:38,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:21:38,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:21:38,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:21:38,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469349529] [2024-06-21 19:21:38,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469349529] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:21:38,567 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:21:38,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 19:21:38,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941460368] [2024-06-21 19:21:38,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:21:38,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 19:21:38,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:21:38,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 19:21:38,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 19:21:38,590 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 40 [2024-06-21 19:21:38,590 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 59 transitions, 413 flow. Second operand has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 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) [2024-06-21 19:21:38,590 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:21:38,591 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 40 [2024-06-21 19:21:38,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:21:38,757 INFO L124 PetriNetUnfolderBase]: 590/1178 cut-off events. [2024-06-21 19:21:38,757 INFO L125 PetriNetUnfolderBase]: For 4075/4139 co-relation queries the response was YES. [2024-06-21 19:21:38,760 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4036 conditions, 1178 events. 590/1178 cut-off events. For 4075/4139 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 7334 event pairs, 110 based on Foata normal form. 28/1190 useless extension candidates. Maximal degree in co-relation 4008. Up to 736 conditions per place. [2024-06-21 19:21:38,764 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 55 selfloop transitions, 18 changer transitions 1/85 dead transitions. [2024-06-21 19:21:38,764 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 85 transitions, 667 flow [2024-06-21 19:21:38,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 19:21:38,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 19:21:38,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 131 transitions. [2024-06-21 19:21:38,765 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.655 [2024-06-21 19:21:38,765 INFO L175 Difference]: Start difference. First operand has 66 places, 59 transitions, 413 flow. Second operand 5 states and 131 transitions. [2024-06-21 19:21:38,765 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 85 transitions, 667 flow [2024-06-21 19:21:38,774 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 85 transitions, 623 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-21 19:21:38,776 INFO L231 Difference]: Finished difference. Result has 69 places, 62 transitions, 461 flow [2024-06-21 19:21:38,776 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=374, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=461, PETRI_PLACES=69, PETRI_TRANSITIONS=62} [2024-06-21 19:21:38,776 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 28 predicate places. [2024-06-21 19:21:38,776 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 62 transitions, 461 flow [2024-06-21 19:21:38,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 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) [2024-06-21 19:21:38,777 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:21:38,777 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:21:38,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-21 19:21:38,777 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:21:38,777 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:21:38,778 INFO L85 PathProgramCache]: Analyzing trace with hash -1915804792, now seen corresponding path program 3 times [2024-06-21 19:21:38,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:21:38,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844279831] [2024-06-21 19:21:38,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:21:38,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:21:38,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:21:39,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:21:39,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:21:39,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844279831] [2024-06-21 19:21:39,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844279831] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:21:39,085 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:21:39,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 19:21:39,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042508294] [2024-06-21 19:21:39,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:21:39,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 19:21:39,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:21:39,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 19:21:39,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 19:21:39,099 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 40 [2024-06-21 19:21:39,099 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 62 transitions, 461 flow. Second operand has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 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) [2024-06-21 19:21:39,100 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:21:39,100 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 40 [2024-06-21 19:21:39,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:21:39,294 INFO L124 PetriNetUnfolderBase]: 601/1213 cut-off events. [2024-06-21 19:21:39,294 INFO L125 PetriNetUnfolderBase]: For 4514/4637 co-relation queries the response was YES. [2024-06-21 19:21:39,296 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4177 conditions, 1213 events. 601/1213 cut-off events. For 4514/4637 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 7675 event pairs, 131 based on Foata normal form. 40/1227 useless extension candidates. Maximal degree in co-relation 4147. Up to 797 conditions per place. [2024-06-21 19:21:39,300 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 55 selfloop transitions, 18 changer transitions 0/84 dead transitions. [2024-06-21 19:21:39,300 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 84 transitions, 681 flow [2024-06-21 19:21:39,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 19:21:39,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 19:21:39,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 130 transitions. [2024-06-21 19:21:39,301 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.65 [2024-06-21 19:21:39,301 INFO L175 Difference]: Start difference. First operand has 69 places, 62 transitions, 461 flow. Second operand 5 states and 130 transitions. [2024-06-21 19:21:39,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 84 transitions, 681 flow [2024-06-21 19:21:39,307 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 84 transitions, 666 flow, removed 3 selfloop flow, removed 1 redundant places. [2024-06-21 19:21:39,309 INFO L231 Difference]: Finished difference. Result has 73 places, 64 transitions, 511 flow [2024-06-21 19:21:39,309 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=446, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=511, PETRI_PLACES=73, PETRI_TRANSITIONS=64} [2024-06-21 19:21:39,310 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 32 predicate places. [2024-06-21 19:21:39,310 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 64 transitions, 511 flow [2024-06-21 19:21:39,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 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) [2024-06-21 19:21:39,310 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:21:39,310 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:21:39,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-21 19:21:39,310 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:21:39,311 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:21:39,311 INFO L85 PathProgramCache]: Analyzing trace with hash -715975898, now seen corresponding path program 4 times [2024-06-21 19:21:39,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:21:39,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386699004] [2024-06-21 19:21:39,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:21:39,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:21:39,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:21:39,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:21:39,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:21:39,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386699004] [2024-06-21 19:21:39,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386699004] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:21:39,586 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:21:39,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 19:21:39,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775898639] [2024-06-21 19:21:39,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:21:39,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 19:21:39,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:21:39,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 19:21:39,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 19:21:39,602 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 40 [2024-06-21 19:21:39,602 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 64 transitions, 511 flow. Second operand has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 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) [2024-06-21 19:21:39,602 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:21:39,602 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 40 [2024-06-21 19:21:39,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:21:39,786 INFO L124 PetriNetUnfolderBase]: 629/1283 cut-off events. [2024-06-21 19:21:39,786 INFO L125 PetriNetUnfolderBase]: For 5927/6116 co-relation queries the response was YES. [2024-06-21 19:21:39,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4558 conditions, 1283 events. 629/1283 cut-off events. For 5927/6116 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 8296 event pairs, 138 based on Foata normal form. 41/1297 useless extension candidates. Maximal degree in co-relation 4526. Up to 602 conditions per place. [2024-06-21 19:21:39,792 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 52 selfloop transitions, 24 changer transitions 0/87 dead transitions. [2024-06-21 19:21:39,793 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 87 transitions, 763 flow [2024-06-21 19:21:39,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 19:21:39,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 19:21:39,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 130 transitions. [2024-06-21 19:21:39,794 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.65 [2024-06-21 19:21:39,794 INFO L175 Difference]: Start difference. First operand has 73 places, 64 transitions, 511 flow. Second operand 5 states and 130 transitions. [2024-06-21 19:21:39,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 87 transitions, 763 flow [2024-06-21 19:21:39,800 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 87 transitions, 724 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-21 19:21:39,801 INFO L231 Difference]: Finished difference. Result has 75 places, 67 transitions, 562 flow [2024-06-21 19:21:39,802 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=472, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=562, PETRI_PLACES=75, PETRI_TRANSITIONS=67} [2024-06-21 19:21:39,802 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 34 predicate places. [2024-06-21 19:21:39,803 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 67 transitions, 562 flow [2024-06-21 19:21:39,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 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) [2024-06-21 19:21:39,803 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:21:39,803 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:21:39,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-21 19:21:39,804 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:21:39,804 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:21:39,804 INFO L85 PathProgramCache]: Analyzing trace with hash -1753860050, now seen corresponding path program 1 times [2024-06-21 19:21:39,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:21:39,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596873478] [2024-06-21 19:21:39,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:21:39,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:21:39,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:21:40,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:21:40,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:21:40,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596873478] [2024-06-21 19:21:40,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596873478] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:21:40,129 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:21:40,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 19:21:40,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234397629] [2024-06-21 19:21:40,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:21:40,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 19:21:40,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:21:40,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 19:21:40,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-21 19:21:40,148 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 40 [2024-06-21 19:21:40,148 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 67 transitions, 562 flow. Second operand has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 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) [2024-06-21 19:21:40,148 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:21:40,148 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 40 [2024-06-21 19:21:40,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:21:40,349 INFO L124 PetriNetUnfolderBase]: 681/1407 cut-off events. [2024-06-21 19:21:40,350 INFO L125 PetriNetUnfolderBase]: For 7530/7738 co-relation queries the response was YES. [2024-06-21 19:21:40,356 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5011 conditions, 1407 events. 681/1407 cut-off events. For 7530/7738 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 9374 event pairs, 139 based on Foata normal form. 64/1444 useless extension candidates. Maximal degree in co-relation 4978. Up to 429 conditions per place. [2024-06-21 19:21:40,360 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 56 selfloop transitions, 21 changer transitions 11/99 dead transitions. [2024-06-21 19:21:40,360 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 99 transitions, 872 flow [2024-06-21 19:21:40,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 19:21:40,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 19:21:40,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 156 transitions. [2024-06-21 19:21:40,361 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.65 [2024-06-21 19:21:40,361 INFO L175 Difference]: Start difference. First operand has 75 places, 67 transitions, 562 flow. Second operand 6 states and 156 transitions. [2024-06-21 19:21:40,362 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 99 transitions, 872 flow [2024-06-21 19:21:40,370 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 99 transitions, 840 flow, removed 9 selfloop flow, removed 2 redundant places. [2024-06-21 19:21:40,371 INFO L231 Difference]: Finished difference. Result has 79 places, 66 transitions, 567 flow [2024-06-21 19:21:40,371 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=532, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=567, PETRI_PLACES=79, PETRI_TRANSITIONS=66} [2024-06-21 19:21:40,371 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 38 predicate places. [2024-06-21 19:21:40,372 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 66 transitions, 567 flow [2024-06-21 19:21:40,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 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) [2024-06-21 19:21:40,372 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:21:40,372 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:21:40,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-21 19:21:40,372 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:21:40,373 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:21:40,373 INFO L85 PathProgramCache]: Analyzing trace with hash -1016125287, now seen corresponding path program 1 times [2024-06-21 19:21:40,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:21:40,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925927392] [2024-06-21 19:21:40,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:21:40,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:21:40,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:21:40,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:21:40,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:21:40,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925927392] [2024-06-21 19:21:40,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925927392] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:21:40,840 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:21:40,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:21:40,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235904310] [2024-06-21 19:21:40,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:21:40,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:21:40,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:21:40,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:21:40,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:21:40,862 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 40 [2024-06-21 19:21:40,863 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 66 transitions, 567 flow. Second operand has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 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) [2024-06-21 19:21:40,863 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:21:40,863 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 40 [2024-06-21 19:21:40,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:21:41,104 INFO L124 PetriNetUnfolderBase]: 658/1380 cut-off events. [2024-06-21 19:21:41,104 INFO L125 PetriNetUnfolderBase]: For 6792/6943 co-relation queries the response was YES. [2024-06-21 19:21:41,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4920 conditions, 1380 events. 658/1380 cut-off events. For 6792/6943 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 9312 event pairs, 149 based on Foata normal form. 48/1402 useless extension candidates. Maximal degree in co-relation 4886. Up to 828 conditions per place. [2024-06-21 19:21:41,111 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 55 selfloop transitions, 16 changer transitions 12/94 dead transitions. [2024-06-21 19:21:41,111 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 94 transitions, 823 flow [2024-06-21 19:21:41,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 19:21:41,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 19:21:41,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 154 transitions. [2024-06-21 19:21:41,112 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6416666666666667 [2024-06-21 19:21:41,113 INFO L175 Difference]: Start difference. First operand has 79 places, 66 transitions, 567 flow. Second operand 6 states and 154 transitions. [2024-06-21 19:21:41,113 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 94 transitions, 823 flow [2024-06-21 19:21:41,123 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 94 transitions, 780 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-06-21 19:21:41,124 INFO L231 Difference]: Finished difference. Result has 81 places, 64 transitions, 537 flow [2024-06-21 19:21:41,124 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=524, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=537, PETRI_PLACES=81, PETRI_TRANSITIONS=64} [2024-06-21 19:21:41,124 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 40 predicate places. [2024-06-21 19:21:41,125 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 64 transitions, 537 flow [2024-06-21 19:21:41,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 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) [2024-06-21 19:21:41,125 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:21:41,125 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:21:41,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-21 19:21:41,125 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:21:41,126 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:21:41,126 INFO L85 PathProgramCache]: Analyzing trace with hash -103940219, now seen corresponding path program 2 times [2024-06-21 19:21:41,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:21:41,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777911150] [2024-06-21 19:21:41,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:21:41,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:21:41,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:21:41,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:21:41,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:21:41,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777911150] [2024-06-21 19:21:41,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777911150] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:21:41,481 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:21:41,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 19:21:41,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061223815] [2024-06-21 19:21:41,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:21:41,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 19:21:41,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:21:41,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 19:21:41,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-21 19:21:41,505 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 40 [2024-06-21 19:21:41,505 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 64 transitions, 537 flow. Second operand has 6 states, 6 states have (on average 17.833333333333332) internal successors, (107), 6 states have internal predecessors, (107), 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) [2024-06-21 19:21:41,505 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:21:41,506 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 40 [2024-06-21 19:21:41,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:21:41,684 INFO L124 PetriNetUnfolderBase]: 572/1221 cut-off events. [2024-06-21 19:21:41,684 INFO L125 PetriNetUnfolderBase]: For 6248/6459 co-relation queries the response was YES. [2024-06-21 19:21:41,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4259 conditions, 1221 events. 572/1221 cut-off events. For 6248/6459 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 7943 event pairs, 107 based on Foata normal form. 49/1243 useless extension candidates. Maximal degree in co-relation 4224. Up to 316 conditions per place. [2024-06-21 19:21:41,695 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 45 selfloop transitions, 21 changer transitions 5/82 dead transitions. [2024-06-21 19:21:41,695 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 82 transitions, 733 flow [2024-06-21 19:21:41,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 19:21:41,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 19:21:41,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 126 transitions. [2024-06-21 19:21:41,697 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.63 [2024-06-21 19:21:41,697 INFO L175 Difference]: Start difference. First operand has 81 places, 64 transitions, 537 flow. Second operand 5 states and 126 transitions. [2024-06-21 19:21:41,697 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 82 transitions, 733 flow [2024-06-21 19:21:41,704 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 82 transitions, 697 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-21 19:21:41,705 INFO L231 Difference]: Finished difference. Result has 79 places, 62 transitions, 518 flow [2024-06-21 19:21:41,706 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=483, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=518, PETRI_PLACES=79, PETRI_TRANSITIONS=62} [2024-06-21 19:21:41,706 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 38 predicate places. [2024-06-21 19:21:41,706 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 62 transitions, 518 flow [2024-06-21 19:21:41,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.833333333333332) internal successors, (107), 6 states have internal predecessors, (107), 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) [2024-06-21 19:21:41,707 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:21:41,707 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:21:41,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-21 19:21:41,707 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:21:41,707 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:21:41,708 INFO L85 PathProgramCache]: Analyzing trace with hash 1688984271, now seen corresponding path program 1 times [2024-06-21 19:21:41,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:21:41,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188474487] [2024-06-21 19:21:41,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:21:41,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:21:41,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:21:42,022 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:21:42,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:21:42,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188474487] [2024-06-21 19:21:42,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188474487] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:21:42,023 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:21:42,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 19:21:42,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199907924] [2024-06-21 19:21:42,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:21:42,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 19:21:42,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:21:42,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 19:21:42,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-21 19:21:42,035 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 40 [2024-06-21 19:21:42,035 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 62 transitions, 518 flow. Second operand has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 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) [2024-06-21 19:21:42,035 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:21:42,035 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 40 [2024-06-21 19:21:42,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:21:42,174 INFO L124 PetriNetUnfolderBase]: 547/1197 cut-off events. [2024-06-21 19:21:42,175 INFO L125 PetriNetUnfolderBase]: For 5428/5454 co-relation queries the response was YES. [2024-06-21 19:21:42,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4135 conditions, 1197 events. 547/1197 cut-off events. For 5428/5454 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 7782 event pairs, 264 based on Foata normal form. 11/1196 useless extension candidates. Maximal degree in co-relation 4100. Up to 952 conditions per place. [2024-06-21 19:21:42,183 INFO L140 encePairwiseOnDemand]: 34/40 looper letters, 58 selfloop transitions, 7 changer transitions 0/76 dead transitions. [2024-06-21 19:21:42,183 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 76 transitions, 704 flow [2024-06-21 19:21:42,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 19:21:42,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 19:21:42,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 101 transitions. [2024-06-21 19:21:42,184 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.63125 [2024-06-21 19:21:42,184 INFO L175 Difference]: Start difference. First operand has 79 places, 62 transitions, 518 flow. Second operand 4 states and 101 transitions. [2024-06-21 19:21:42,184 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 76 transitions, 704 flow [2024-06-21 19:21:42,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 76 transitions, 649 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-21 19:21:42,197 INFO L231 Difference]: Finished difference. Result has 77 places, 64 transitions, 507 flow [2024-06-21 19:21:42,197 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=463, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=507, PETRI_PLACES=77, PETRI_TRANSITIONS=64} [2024-06-21 19:21:42,199 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 36 predicate places. [2024-06-21 19:21:42,199 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 64 transitions, 507 flow [2024-06-21 19:21:42,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 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) [2024-06-21 19:21:42,199 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:21:42,199 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:21:42,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-21 19:21:42,200 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:21:42,200 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:21:42,201 INFO L85 PathProgramCache]: Analyzing trace with hash -1402254641, now seen corresponding path program 2 times [2024-06-21 19:21:42,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:21:42,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785557093] [2024-06-21 19:21:42,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:21:42,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:21:42,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:21:42,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:21:42,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:21:42,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785557093] [2024-06-21 19:21:42,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785557093] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:21:42,444 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:21:42,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 19:21:42,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579087094] [2024-06-21 19:21:42,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:21:42,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 19:21:42,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:21:42,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 19:21:42,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 19:21:42,466 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 19:21:42,466 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 64 transitions, 507 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 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) [2024-06-21 19:21:42,467 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:21:42,467 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 19:21:42,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:21:42,620 INFO L124 PetriNetUnfolderBase]: 523/1134 cut-off events. [2024-06-21 19:21:42,620 INFO L125 PetriNetUnfolderBase]: For 4848/4872 co-relation queries the response was YES. [2024-06-21 19:21:42,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3814 conditions, 1134 events. 523/1134 cut-off events. For 4848/4872 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 7261 event pairs, 226 based on Foata normal form. 11/1132 useless extension candidates. Maximal degree in co-relation 3779. Up to 896 conditions per place. [2024-06-21 19:21:42,626 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 52 selfloop transitions, 8 changer transitions 9/79 dead transitions. [2024-06-21 19:21:42,626 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 79 transitions, 715 flow [2024-06-21 19:21:42,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 19:21:42,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 19:21:42,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 110 transitions. [2024-06-21 19:21:42,627 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.55 [2024-06-21 19:21:42,627 INFO L175 Difference]: Start difference. First operand has 77 places, 64 transitions, 507 flow. Second operand 5 states and 110 transitions. [2024-06-21 19:21:42,627 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 79 transitions, 715 flow [2024-06-21 19:21:42,634 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 79 transitions, 697 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-21 19:21:42,635 INFO L231 Difference]: Finished difference. Result has 81 places, 60 transitions, 482 flow [2024-06-21 19:21:42,635 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=491, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=482, PETRI_PLACES=81, PETRI_TRANSITIONS=60} [2024-06-21 19:21:42,635 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 40 predicate places. [2024-06-21 19:21:42,635 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 60 transitions, 482 flow [2024-06-21 19:21:42,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 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) [2024-06-21 19:21:42,636 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:21:42,636 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:21:42,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-21 19:21:42,649 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:21:42,650 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:21:42,650 INFO L85 PathProgramCache]: Analyzing trace with hash -383732050, now seen corresponding path program 1 times [2024-06-21 19:21:42,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:21:42,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197007778] [2024-06-21 19:21:42,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:21:42,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:21:42,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:21:43,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:21:43,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:21:43,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197007778] [2024-06-21 19:21:43,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197007778] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:21:43,114 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:21:43,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 19:21:43,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602974515] [2024-06-21 19:21:43,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:21:43,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 19:21:43,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:21:43,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 19:21:43,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-21 19:21:43,128 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 40 [2024-06-21 19:21:43,129 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 60 transitions, 482 flow. Second operand has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 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) [2024-06-21 19:21:43,129 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:21:43,129 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 40 [2024-06-21 19:21:43,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:21:43,257 INFO L124 PetriNetUnfolderBase]: 381/840 cut-off events. [2024-06-21 19:21:43,257 INFO L125 PetriNetUnfolderBase]: For 4834/4857 co-relation queries the response was YES. [2024-06-21 19:21:43,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3000 conditions, 840 events. 381/840 cut-off events. For 4834/4857 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 4964 event pairs, 184 based on Foata normal form. 11/840 useless extension candidates. Maximal degree in co-relation 2963. Up to 640 conditions per place. [2024-06-21 19:21:43,262 INFO L140 encePairwiseOnDemand]: 35/40 looper letters, 55 selfloop transitions, 8 changer transitions 0/74 dead transitions. [2024-06-21 19:21:43,262 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 74 transitions, 646 flow [2024-06-21 19:21:43,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 19:21:43,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 19:21:43,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 119 transitions. [2024-06-21 19:21:43,263 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.595 [2024-06-21 19:21:43,263 INFO L175 Difference]: Start difference. First operand has 81 places, 60 transitions, 482 flow. Second operand 5 states and 119 transitions. [2024-06-21 19:21:43,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 74 transitions, 646 flow [2024-06-21 19:21:43,274 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 74 transitions, 613 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-21 19:21:43,276 INFO L231 Difference]: Finished difference. Result has 78 places, 60 transitions, 469 flow [2024-06-21 19:21:43,276 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=449, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=469, PETRI_PLACES=78, PETRI_TRANSITIONS=60} [2024-06-21 19:21:43,276 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 37 predicate places. [2024-06-21 19:21:43,277 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 60 transitions, 469 flow [2024-06-21 19:21:43,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 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) [2024-06-21 19:21:43,277 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:21:43,277 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:21:43,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-21 19:21:43,277 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:21:43,278 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:21:43,278 INFO L85 PathProgramCache]: Analyzing trace with hash 2054268942, now seen corresponding path program 1 times [2024-06-21 19:21:43,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:21:43,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030126321] [2024-06-21 19:21:43,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:21:43,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:21:43,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:21:43,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:21:43,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:21:43,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030126321] [2024-06-21 19:21:43,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030126321] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:21:43,569 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:21:43,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 19:21:43,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62775805] [2024-06-21 19:21:43,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:21:43,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 19:21:43,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:21:43,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 19:21:43,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 19:21:43,585 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 40 [2024-06-21 19:21:43,585 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 60 transitions, 469 flow. Second operand has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 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) [2024-06-21 19:21:43,585 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:21:43,586 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 40 [2024-06-21 19:21:43,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:21:43,719 INFO L124 PetriNetUnfolderBase]: 389/831 cut-off events. [2024-06-21 19:21:43,719 INFO L125 PetriNetUnfolderBase]: For 4411/4508 co-relation queries the response was YES. [2024-06-21 19:21:43,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2975 conditions, 831 events. 389/831 cut-off events. For 4411/4508 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 4750 event pairs, 123 based on Foata normal form. 21/829 useless extension candidates. Maximal degree in co-relation 2941. Up to 539 conditions per place. [2024-06-21 19:21:43,723 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 52 selfloop transitions, 17 changer transitions 0/80 dead transitions. [2024-06-21 19:21:43,723 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 80 transitions, 679 flow [2024-06-21 19:21:43,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 19:21:43,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 19:21:43,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 126 transitions. [2024-06-21 19:21:43,724 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.63 [2024-06-21 19:21:43,725 INFO L175 Difference]: Start difference. First operand has 78 places, 60 transitions, 469 flow. Second operand 5 states and 126 transitions. [2024-06-21 19:21:43,725 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 80 transitions, 679 flow [2024-06-21 19:21:43,730 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 80 transitions, 654 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-21 19:21:43,731 INFO L231 Difference]: Finished difference. Result has 79 places, 62 transitions, 507 flow [2024-06-21 19:21:43,731 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=444, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=507, PETRI_PLACES=79, PETRI_TRANSITIONS=62} [2024-06-21 19:21:43,732 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 38 predicate places. [2024-06-21 19:21:43,732 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 62 transitions, 507 flow [2024-06-21 19:21:43,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 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) [2024-06-21 19:21:43,732 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:21:43,732 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:21:43,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-21 19:21:43,733 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:21:43,733 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:21:43,733 INFO L85 PathProgramCache]: Analyzing trace with hash 2047815796, now seen corresponding path program 2 times [2024-06-21 19:21:43,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:21:43,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669912564] [2024-06-21 19:21:43,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:21:43,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:21:43,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:21:43,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:21:43,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:21:43,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669912564] [2024-06-21 19:21:43,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669912564] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:21:43,990 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:21:43,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:21:43,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11243] [2024-06-21 19:21:43,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:21:43,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:21:43,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:21:43,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:21:43,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:21:44,025 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 19:21:44,026 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 62 transitions, 507 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 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) [2024-06-21 19:21:44,026 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:21:44,026 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 19:21:44,026 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:21:44,242 INFO L124 PetriNetUnfolderBase]: 387/833 cut-off events. [2024-06-21 19:21:44,242 INFO L125 PetriNetUnfolderBase]: For 4790/4887 co-relation queries the response was YES. [2024-06-21 19:21:44,244 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3070 conditions, 833 events. 387/833 cut-off events. For 4790/4887 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 4758 event pairs, 113 based on Foata normal form. 21/832 useless extension candidates. Maximal degree in co-relation 3035. Up to 514 conditions per place. [2024-06-21 19:21:44,245 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 54 selfloop transitions, 27 changer transitions 2/93 dead transitions. [2024-06-21 19:21:44,246 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 93 transitions, 832 flow [2024-06-21 19:21:44,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:21:44,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:21:44,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 170 transitions. [2024-06-21 19:21:44,247 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.53125 [2024-06-21 19:21:44,247 INFO L175 Difference]: Start difference. First operand has 79 places, 62 transitions, 507 flow. Second operand 8 states and 170 transitions. [2024-06-21 19:21:44,247 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 93 transitions, 832 flow [2024-06-21 19:21:44,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 93 transitions, 786 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-21 19:21:44,258 INFO L231 Difference]: Finished difference. Result has 86 places, 68 transitions, 617 flow [2024-06-21 19:21:44,258 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=472, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=617, PETRI_PLACES=86, PETRI_TRANSITIONS=68} [2024-06-21 19:21:44,259 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 45 predicate places. [2024-06-21 19:21:44,259 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 68 transitions, 617 flow [2024-06-21 19:21:44,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 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) [2024-06-21 19:21:44,260 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:21:44,260 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:21:44,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-21 19:21:44,260 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:21:44,261 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:21:44,261 INFO L85 PathProgramCache]: Analyzing trace with hash -855954512, now seen corresponding path program 3 times [2024-06-21 19:21:44,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:21:44,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41101282] [2024-06-21 19:21:44,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:21:44,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:21:44,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:21:44,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:21:44,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:21:44,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41101282] [2024-06-21 19:21:44,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41101282] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:21:44,532 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:21:44,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 19:21:44,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279362098] [2024-06-21 19:21:44,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:21:44,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 19:21:44,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:21:44,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 19:21:44,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 19:21:44,548 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 40 [2024-06-21 19:21:44,548 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 68 transitions, 617 flow. Second operand has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 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) [2024-06-21 19:21:44,548 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:21:44,548 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 40 [2024-06-21 19:21:44,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:21:44,671 INFO L124 PetriNetUnfolderBase]: 374/819 cut-off events. [2024-06-21 19:21:44,671 INFO L125 PetriNetUnfolderBase]: For 5582/5724 co-relation queries the response was YES. [2024-06-21 19:21:44,673 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3159 conditions, 819 events. 374/819 cut-off events. For 5582/5724 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 4757 event pairs, 73 based on Foata normal form. 29/829 useless extension candidates. Maximal degree in co-relation 3120. Up to 353 conditions per place. [2024-06-21 19:21:44,675 INFO L140 encePairwiseOnDemand]: 34/40 looper letters, 55 selfloop transitions, 23 changer transitions 0/89 dead transitions. [2024-06-21 19:21:44,675 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 89 transitions, 883 flow [2024-06-21 19:21:44,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 19:21:44,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 19:21:44,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 127 transitions. [2024-06-21 19:21:44,676 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.635 [2024-06-21 19:21:44,676 INFO L175 Difference]: Start difference. First operand has 86 places, 68 transitions, 617 flow. Second operand 5 states and 127 transitions. [2024-06-21 19:21:44,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 89 transitions, 883 flow [2024-06-21 19:21:44,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 89 transitions, 868 flow, removed 3 selfloop flow, removed 1 redundant places. [2024-06-21 19:21:44,685 INFO L231 Difference]: Finished difference. Result has 90 places, 71 transitions, 697 flow [2024-06-21 19:21:44,685 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=602, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=697, PETRI_PLACES=90, PETRI_TRANSITIONS=71} [2024-06-21 19:21:44,686 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 49 predicate places. [2024-06-21 19:21:44,686 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 71 transitions, 697 flow [2024-06-21 19:21:44,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 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) [2024-06-21 19:21:44,686 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:21:44,686 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:21:44,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-21 19:21:44,686 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:21:44,687 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:21:44,687 INFO L85 PathProgramCache]: Analyzing trace with hash -224712737, now seen corresponding path program 1 times [2024-06-21 19:21:44,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:21:44,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496220956] [2024-06-21 19:21:44,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:21:44,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:21:44,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:21:45,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:21:45,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:21:45,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496220956] [2024-06-21 19:21:45,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496220956] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:21:45,116 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:21:45,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:21:45,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268771804] [2024-06-21 19:21:45,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:21:45,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:21:45,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:21:45,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:21:45,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:21:45,141 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 19:21:45,142 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 71 transitions, 697 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 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) [2024-06-21 19:21:45,142 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:21:45,142 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 19:21:45,142 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:21:45,305 INFO L124 PetriNetUnfolderBase]: 427/951 cut-off events. [2024-06-21 19:21:45,306 INFO L125 PetriNetUnfolderBase]: For 7622/7905 co-relation queries the response was YES. [2024-06-21 19:21:45,308 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3739 conditions, 951 events. 427/951 cut-off events. For 7622/7905 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 5834 event pairs, 60 based on Foata normal form. 48/975 useless extension candidates. Maximal degree in co-relation 3697. Up to 479 conditions per place. [2024-06-21 19:21:45,311 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 53 selfloop transitions, 33 changer transitions 0/96 dead transitions. [2024-06-21 19:21:45,311 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 96 transitions, 999 flow [2024-06-21 19:21:45,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 19:21:45,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 19:21:45,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 121 transitions. [2024-06-21 19:21:45,312 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.605 [2024-06-21 19:21:45,312 INFO L175 Difference]: Start difference. First operand has 90 places, 71 transitions, 697 flow. Second operand 5 states and 121 transitions. [2024-06-21 19:21:45,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 96 transitions, 999 flow [2024-06-21 19:21:45,323 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 96 transitions, 973 flow, removed 7 selfloop flow, removed 1 redundant places. [2024-06-21 19:21:45,324 INFO L231 Difference]: Finished difference. Result has 96 places, 76 transitions, 855 flow [2024-06-21 19:21:45,324 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=673, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=855, PETRI_PLACES=96, PETRI_TRANSITIONS=76} [2024-06-21 19:21:45,324 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 55 predicate places. [2024-06-21 19:21:45,324 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 76 transitions, 855 flow [2024-06-21 19:21:45,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 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) [2024-06-21 19:21:45,325 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:21:45,325 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:21:45,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-21 19:21:45,325 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:21:45,325 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:21:45,326 INFO L85 PathProgramCache]: Analyzing trace with hash -229067295, now seen corresponding path program 2 times [2024-06-21 19:21:45,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:21:45,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638212699] [2024-06-21 19:21:45,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:21:45,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:21:45,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:21:45,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:21:45,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:21:45,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638212699] [2024-06-21 19:21:45,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638212699] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:21:45,791 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:21:45,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:21:45,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180480606] [2024-06-21 19:21:45,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:21:45,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:21:45,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:21:45,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:21:45,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:21:45,805 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 19:21:45,805 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 76 transitions, 855 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 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) [2024-06-21 19:21:45,806 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:21:45,806 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 19:21:45,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:21:46,076 INFO L124 PetriNetUnfolderBase]: 471/1029 cut-off events. [2024-06-21 19:21:46,076 INFO L125 PetriNetUnfolderBase]: For 9641/9860 co-relation queries the response was YES. [2024-06-21 19:21:46,080 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4422 conditions, 1029 events. 471/1029 cut-off events. For 9641/9860 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 6357 event pairs, 104 based on Foata normal form. 55/1058 useless extension candidates. Maximal degree in co-relation 4374. Up to 474 conditions per place. [2024-06-21 19:21:46,082 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 61 selfloop transitions, 27 changer transitions 5/103 dead transitions. [2024-06-21 19:21:46,082 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 103 transitions, 1195 flow [2024-06-21 19:21:46,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:21:46,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:21:46,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 164 transitions. [2024-06-21 19:21:46,084 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5125 [2024-06-21 19:21:46,084 INFO L175 Difference]: Start difference. First operand has 96 places, 76 transitions, 855 flow. Second operand 8 states and 164 transitions. [2024-06-21 19:21:46,085 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 103 transitions, 1195 flow [2024-06-21 19:21:46,098 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 103 transitions, 1177 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-06-21 19:21:46,099 INFO L231 Difference]: Finished difference. Result has 103 places, 76 transitions, 936 flow [2024-06-21 19:21:46,099 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=839, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=936, PETRI_PLACES=103, PETRI_TRANSITIONS=76} [2024-06-21 19:21:46,099 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 62 predicate places. [2024-06-21 19:21:46,100 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 76 transitions, 936 flow [2024-06-21 19:21:46,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 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) [2024-06-21 19:21:46,100 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:21:46,100 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:21:46,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-21 19:21:46,100 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:21:46,101 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:21:46,101 INFO L85 PathProgramCache]: Analyzing trace with hash 1470862385, now seen corresponding path program 3 times [2024-06-21 19:21:46,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:21:46,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868790494] [2024-06-21 19:21:46,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:21:46,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:21:46,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:21:46,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:21:46,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:21:46,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868790494] [2024-06-21 19:21:46,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868790494] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:21:46,525 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:21:46,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:21:46,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015426905] [2024-06-21 19:21:46,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:21:46,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:21:46,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:21:46,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:21:46,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:21:46,542 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 40 [2024-06-21 19:21:46,543 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 76 transitions, 936 flow. Second operand has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 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) [2024-06-21 19:21:46,543 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:21:46,543 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 40 [2024-06-21 19:21:46,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:21:46,761 INFO L124 PetriNetUnfolderBase]: 447/1010 cut-off events. [2024-06-21 19:21:46,762 INFO L125 PetriNetUnfolderBase]: For 11021/11210 co-relation queries the response was YES. [2024-06-21 19:21:46,765 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4391 conditions, 1010 events. 447/1010 cut-off events. For 11021/11210 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 6377 event pairs, 137 based on Foata normal form. 35/1009 useless extension candidates. Maximal degree in co-relation 4341. Up to 576 conditions per place. [2024-06-21 19:21:46,767 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 60 selfloop transitions, 24 changer transitions 0/95 dead transitions. [2024-06-21 19:21:46,768 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 95 transitions, 1176 flow [2024-06-21 19:21:46,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 19:21:46,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 19:21:46,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 126 transitions. [2024-06-21 19:21:46,769 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.63 [2024-06-21 19:21:46,769 INFO L175 Difference]: Start difference. First operand has 103 places, 76 transitions, 936 flow. Second operand 5 states and 126 transitions. [2024-06-21 19:21:46,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 95 transitions, 1176 flow [2024-06-21 19:21:46,782 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 95 transitions, 1113 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-21 19:21:46,783 INFO L231 Difference]: Finished difference. Result has 102 places, 77 transitions, 946 flow [2024-06-21 19:21:46,783 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=873, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=946, PETRI_PLACES=102, PETRI_TRANSITIONS=77} [2024-06-21 19:21:46,784 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 61 predicate places. [2024-06-21 19:21:46,784 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 77 transitions, 946 flow [2024-06-21 19:21:46,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 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) [2024-06-21 19:21:46,785 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:21:46,785 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:21:46,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-21 19:21:46,785 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:21:46,785 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:21:46,786 INFO L85 PathProgramCache]: Analyzing trace with hash -500473599, now seen corresponding path program 4 times [2024-06-21 19:21:46,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:21:46,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314561949] [2024-06-21 19:21:46,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:21:46,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:21:46,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:21:47,157 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:21:47,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:21:47,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314561949] [2024-06-21 19:21:47,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314561949] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:21:47,158 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:21:47,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:21:47,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914205697] [2024-06-21 19:21:47,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:21:47,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:21:47,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:21:47,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:21:47,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:21:47,176 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 40 [2024-06-21 19:21:47,177 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 77 transitions, 946 flow. Second operand has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 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) [2024-06-21 19:21:47,177 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:21:47,177 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 40 [2024-06-21 19:21:47,177 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:21:47,353 INFO L124 PetriNetUnfolderBase]: 435/981 cut-off events. [2024-06-21 19:21:47,354 INFO L125 PetriNetUnfolderBase]: For 11118/11307 co-relation queries the response was YES. [2024-06-21 19:21:47,356 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4204 conditions, 981 events. 435/981 cut-off events. For 11118/11307 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 6173 event pairs, 114 based on Foata normal form. 35/981 useless extension candidates. Maximal degree in co-relation 4157. Up to 542 conditions per place. [2024-06-21 19:21:47,359 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 56 selfloop transitions, 19 changer transitions 10/96 dead transitions. [2024-06-21 19:21:47,359 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 96 transitions, 1174 flow [2024-06-21 19:21:47,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 19:21:47,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 19:21:47,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 127 transitions. [2024-06-21 19:21:47,360 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.635 [2024-06-21 19:21:47,360 INFO L175 Difference]: Start difference. First operand has 102 places, 77 transitions, 946 flow. Second operand 5 states and 127 transitions. [2024-06-21 19:21:47,360 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 96 transitions, 1174 flow [2024-06-21 19:21:47,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 96 transitions, 1127 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-21 19:21:47,377 INFO L231 Difference]: Finished difference. Result has 104 places, 69 transitions, 826 flow [2024-06-21 19:21:47,377 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=899, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=826, PETRI_PLACES=104, PETRI_TRANSITIONS=69} [2024-06-21 19:21:47,377 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 63 predicate places. [2024-06-21 19:21:47,377 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 69 transitions, 826 flow [2024-06-21 19:21:47,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 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) [2024-06-21 19:21:47,378 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:21:47,378 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:21:47,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-21 19:21:47,378 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:21:47,378 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:21:47,378 INFO L85 PathProgramCache]: Analyzing trace with hash -1132292763, now seen corresponding path program 5 times [2024-06-21 19:21:47,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:21:47,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14329013] [2024-06-21 19:21:47,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:21:47,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:21:47,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:21:47,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:21:47,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:21:47,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14329013] [2024-06-21 19:21:47,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14329013] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:21:47,793 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:21:47,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:21:47,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744371982] [2024-06-21 19:21:47,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:21:47,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:21:47,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:21:47,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:21:47,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:21:47,828 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 40 [2024-06-21 19:21:47,829 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 69 transitions, 826 flow. Second operand has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 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) [2024-06-21 19:21:47,829 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:21:47,829 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 40 [2024-06-21 19:21:47,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:21:47,985 INFO L124 PetriNetUnfolderBase]: 377/869 cut-off events. [2024-06-21 19:21:47,985 INFO L125 PetriNetUnfolderBase]: For 10645/10877 co-relation queries the response was YES. [2024-06-21 19:21:47,987 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3718 conditions, 869 events. 377/869 cut-off events. For 10645/10877 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 5347 event pairs, 75 based on Foata normal form. 36/878 useless extension candidates. Maximal degree in co-relation 3670. Up to 255 conditions per place. [2024-06-21 19:21:47,989 INFO L140 encePairwiseOnDemand]: 35/40 looper letters, 52 selfloop transitions, 22 changer transitions 0/85 dead transitions. [2024-06-21 19:21:47,989 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 85 transitions, 1050 flow [2024-06-21 19:21:47,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 19:21:47,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 19:21:47,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 123 transitions. [2024-06-21 19:21:47,991 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.615 [2024-06-21 19:21:47,992 INFO L175 Difference]: Start difference. First operand has 104 places, 69 transitions, 826 flow. Second operand 5 states and 123 transitions. [2024-06-21 19:21:47,992 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 85 transitions, 1050 flow [2024-06-21 19:21:48,004 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 85 transitions, 970 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-21 19:21:48,005 INFO L231 Difference]: Finished difference. Result has 101 places, 69 transitions, 800 flow [2024-06-21 19:21:48,005 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=750, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=800, PETRI_PLACES=101, PETRI_TRANSITIONS=69} [2024-06-21 19:21:48,006 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 60 predicate places. [2024-06-21 19:21:48,006 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 69 transitions, 800 flow [2024-06-21 19:21:48,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 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) [2024-06-21 19:21:48,006 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:21:48,006 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:21:48,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-21 19:21:48,006 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:21:48,007 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:21:48,007 INFO L85 PathProgramCache]: Analyzing trace with hash -785655777, now seen corresponding path program 6 times [2024-06-21 19:21:48,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:21:48,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606627958] [2024-06-21 19:21:48,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:21:48,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:21:48,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:21:48,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:21:48,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:21:48,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606627958] [2024-06-21 19:21:48,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606627958] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:21:48,358 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:21:48,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:21:48,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874423925] [2024-06-21 19:21:48,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:21:48,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:21:48,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:21:48,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:21:48,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:21:48,371 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 19:21:48,371 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 69 transitions, 800 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 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) [2024-06-21 19:21:48,372 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:21:48,372 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 19:21:48,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:21:48,535 INFO L124 PetriNetUnfolderBase]: 365/830 cut-off events. [2024-06-21 19:21:48,535 INFO L125 PetriNetUnfolderBase]: For 9380/9400 co-relation queries the response was YES. [2024-06-21 19:21:48,537 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3481 conditions, 830 events. 365/830 cut-off events. For 9380/9400 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 5065 event pairs, 84 based on Foata normal form. 10/817 useless extension candidates. Maximal degree in co-relation 3433. Up to 351 conditions per place. [2024-06-21 19:21:48,539 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 51 selfloop transitions, 21 changer transitions 5/87 dead transitions. [2024-06-21 19:21:48,539 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 87 transitions, 1010 flow [2024-06-21 19:21:48,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 19:21:48,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 19:21:48,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 132 transitions. [2024-06-21 19:21:48,541 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.55 [2024-06-21 19:21:48,541 INFO L175 Difference]: Start difference. First operand has 101 places, 69 transitions, 800 flow. Second operand 6 states and 132 transitions. [2024-06-21 19:21:48,541 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 87 transitions, 1010 flow [2024-06-21 19:21:48,551 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 87 transitions, 955 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-21 19:21:48,553 INFO L231 Difference]: Finished difference. Result has 103 places, 66 transitions, 766 flow [2024-06-21 19:21:48,553 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=745, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=766, PETRI_PLACES=103, PETRI_TRANSITIONS=66} [2024-06-21 19:21:48,553 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 62 predicate places. [2024-06-21 19:21:48,553 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 66 transitions, 766 flow [2024-06-21 19:21:48,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 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) [2024-06-21 19:21:48,554 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:21:48,554 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:21:48,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-21 19:21:48,554 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:21:48,554 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:21:48,554 INFO L85 PathProgramCache]: Analyzing trace with hash -582219893, now seen corresponding path program 1 times [2024-06-21 19:21:48,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:21:48,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505370228] [2024-06-21 19:21:48,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:21:48,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:21:48,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:21:49,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:21:49,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:21:49,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505370228] [2024-06-21 19:21:49,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505370228] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:21:49,003 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:21:49,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:21:49,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704340501] [2024-06-21 19:21:49,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:21:49,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:21:49,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:21:49,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:21:49,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:21:49,036 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 40 [2024-06-21 19:21:49,036 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 66 transitions, 766 flow. Second operand has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 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) [2024-06-21 19:21:49,036 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:21:49,037 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 40 [2024-06-21 19:21:49,037 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:21:49,195 INFO L124 PetriNetUnfolderBase]: 333/778 cut-off events. [2024-06-21 19:21:49,195 INFO L125 PetriNetUnfolderBase]: For 10124/10284 co-relation queries the response was YES. [2024-06-21 19:21:49,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3248 conditions, 778 events. 333/778 cut-off events. For 10124/10284 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 4709 event pairs, 70 based on Foata normal form. 32/790 useless extension candidates. Maximal degree in co-relation 3200. Up to 414 conditions per place. [2024-06-21 19:21:49,199 INFO L140 encePairwiseOnDemand]: 34/40 looper letters, 52 selfloop transitions, 18 changer transitions 6/87 dead transitions. [2024-06-21 19:21:49,200 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 87 transitions, 990 flow [2024-06-21 19:21:49,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 19:21:49,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 19:21:49,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 143 transitions. [2024-06-21 19:21:49,201 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5958333333333333 [2024-06-21 19:21:49,201 INFO L175 Difference]: Start difference. First operand has 103 places, 66 transitions, 766 flow. Second operand 6 states and 143 transitions. [2024-06-21 19:21:49,201 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 87 transitions, 990 flow [2024-06-21 19:21:49,211 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 87 transitions, 902 flow, removed 5 selfloop flow, removed 9 redundant places. [2024-06-21 19:21:49,212 INFO L231 Difference]: Finished difference. Result has 99 places, 65 transitions, 698 flow [2024-06-21 19:21:49,212 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=678, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=698, PETRI_PLACES=99, PETRI_TRANSITIONS=65} [2024-06-21 19:21:49,212 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 58 predicate places. [2024-06-21 19:21:49,212 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 65 transitions, 698 flow [2024-06-21 19:21:49,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 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) [2024-06-21 19:21:49,213 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:21:49,213 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:21:49,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-21 19:21:49,213 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:21:49,213 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:21:49,213 INFO L85 PathProgramCache]: Analyzing trace with hash 2061456207, now seen corresponding path program 2 times [2024-06-21 19:21:49,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:21:49,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416720444] [2024-06-21 19:21:49,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:21:49,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:21:49,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:21:49,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:21:49,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:21:49,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416720444] [2024-06-21 19:21:49,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416720444] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:21:49,566 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:21:49,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 19:21:49,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996620558] [2024-06-21 19:21:49,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:21:49,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 19:21:49,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:21:49,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 19:21:49,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-21 19:21:49,601 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 40 [2024-06-21 19:21:49,602 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 65 transitions, 698 flow. Second operand has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 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) [2024-06-21 19:21:49,602 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:21:49,602 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 40 [2024-06-21 19:21:49,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:21:49,726 INFO L124 PetriNetUnfolderBase]: 329/771 cut-off events. [2024-06-21 19:21:49,726 INFO L125 PetriNetUnfolderBase]: For 7675/7812 co-relation queries the response was YES. [2024-06-21 19:21:49,728 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3054 conditions, 771 events. 329/771 cut-off events. For 7675/7812 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 4670 event pairs, 71 based on Foata normal form. 38/794 useless extension candidates. Maximal degree in co-relation 3008. Up to 208 conditions per place. [2024-06-21 19:21:49,729 INFO L140 encePairwiseOnDemand]: 34/40 looper letters, 38 selfloop transitions, 11 changer transitions 21/81 dead transitions. [2024-06-21 19:21:49,730 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 81 transitions, 892 flow [2024-06-21 19:21:49,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 19:21:49,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 19:21:49,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 121 transitions. [2024-06-21 19:21:49,749 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.605 [2024-06-21 19:21:49,749 INFO L175 Difference]: Start difference. First operand has 99 places, 65 transitions, 698 flow. Second operand 5 states and 121 transitions. [2024-06-21 19:21:49,749 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 81 transitions, 892 flow [2024-06-21 19:21:49,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 81 transitions, 854 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-06-21 19:21:49,758 INFO L231 Difference]: Finished difference. Result has 98 places, 48 transitions, 460 flow [2024-06-21 19:21:49,758 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=660, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=460, PETRI_PLACES=98, PETRI_TRANSITIONS=48} [2024-06-21 19:21:49,758 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 57 predicate places. [2024-06-21 19:21:49,758 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 48 transitions, 460 flow [2024-06-21 19:21:49,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 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) [2024-06-21 19:21:49,759 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:21:49,759 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:21:49,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-21 19:21:49,759 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:21:49,759 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:21:49,760 INFO L85 PathProgramCache]: Analyzing trace with hash 1209942965, now seen corresponding path program 3 times [2024-06-21 19:21:49,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:21:49,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518569569] [2024-06-21 19:21:49,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:21:49,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:21:49,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:21:50,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:21:50,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:21:50,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518569569] [2024-06-21 19:21:50,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518569569] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:21:50,166 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:21:50,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:21:50,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749529426] [2024-06-21 19:21:50,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:21:50,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:21:50,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:21:50,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:21:50,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:21:50,178 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 40 [2024-06-21 19:21:50,178 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 48 transitions, 460 flow. Second operand has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 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) [2024-06-21 19:21:50,179 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:21:50,179 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 40 [2024-06-21 19:21:50,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:21:50,315 INFO L124 PetriNetUnfolderBase]: 163/379 cut-off events. [2024-06-21 19:21:50,316 INFO L125 PetriNetUnfolderBase]: For 4213/4245 co-relation queries the response was YES. [2024-06-21 19:21:50,317 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1528 conditions, 379 events. 163/379 cut-off events. For 4213/4245 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1777 event pairs, 17 based on Foata normal form. 17/391 useless extension candidates. Maximal degree in co-relation 1482. Up to 98 conditions per place. [2024-06-21 19:21:50,317 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 33 selfloop transitions, 12 changer transitions 7/63 dead transitions. [2024-06-21 19:21:50,318 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 63 transitions, 606 flow [2024-06-21 19:21:50,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:21:50,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:21:50,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 152 transitions. [2024-06-21 19:21:50,318 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5428571428571428 [2024-06-21 19:21:50,319 INFO L175 Difference]: Start difference. First operand has 98 places, 48 transitions, 460 flow. Second operand 7 states and 152 transitions. [2024-06-21 19:21:50,319 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 63 transitions, 606 flow [2024-06-21 19:21:50,323 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 63 transitions, 458 flow, removed 7 selfloop flow, removed 27 redundant places. [2024-06-21 19:21:50,323 INFO L231 Difference]: Finished difference. Result has 78 places, 45 transitions, 313 flow [2024-06-21 19:21:50,323 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=316, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=313, PETRI_PLACES=78, PETRI_TRANSITIONS=45} [2024-06-21 19:21:50,328 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 37 predicate places. [2024-06-21 19:21:50,328 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 45 transitions, 313 flow [2024-06-21 19:21:50,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 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) [2024-06-21 19:21:50,328 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:21:50,328 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:21:50,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-21 19:21:50,328 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:21:50,329 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:21:50,329 INFO L85 PathProgramCache]: Analyzing trace with hash -1868618718, now seen corresponding path program 1 times [2024-06-21 19:21:50,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:21:50,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193921747] [2024-06-21 19:21:50,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:21:50,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:21:50,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:21:50,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:21:50,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:21:50,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193921747] [2024-06-21 19:21:50,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193921747] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:21:50,817 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:21:50,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:21:50,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037664320] [2024-06-21 19:21:50,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:21:50,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:21:50,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:21:50,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:21:50,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:21:50,846 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 40 [2024-06-21 19:21:50,847 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 45 transitions, 313 flow. Second operand has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 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) [2024-06-21 19:21:50,847 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:21:50,847 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 40 [2024-06-21 19:21:50,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:21:50,908 INFO L124 PetriNetUnfolderBase]: 107/271 cut-off events. [2024-06-21 19:21:50,908 INFO L125 PetriNetUnfolderBase]: For 1369/1401 co-relation queries the response was YES. [2024-06-21 19:21:50,909 INFO L83 FinitePrefix]: Finished finitePrefix Result has 973 conditions, 271 events. 107/271 cut-off events. For 1369/1401 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 1160 event pairs, 13 based on Foata normal form. 11/277 useless extension candidates. Maximal degree in co-relation 952. Up to 133 conditions per place. [2024-06-21 19:21:50,909 INFO L140 encePairwiseOnDemand]: 36/40 looper letters, 0 selfloop transitions, 0 changer transitions 51/51 dead transitions. [2024-06-21 19:21:50,909 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 51 transitions, 391 flow [2024-06-21 19:21:50,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 19:21:50,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 19:21:50,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 106 transitions. [2024-06-21 19:21:50,910 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.53 [2024-06-21 19:21:50,910 INFO L175 Difference]: Start difference. First operand has 78 places, 45 transitions, 313 flow. Second operand 5 states and 106 transitions. [2024-06-21 19:21:50,910 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 51 transitions, 391 flow [2024-06-21 19:21:50,911 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 51 transitions, 312 flow, removed 3 selfloop flow, removed 15 redundant places. [2024-06-21 19:21:50,912 INFO L231 Difference]: Finished difference. Result has 64 places, 0 transitions, 0 flow [2024-06-21 19:21:50,912 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=64, PETRI_TRANSITIONS=0} [2024-06-21 19:21:50,914 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 23 predicate places. [2024-06-21 19:21:50,914 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 0 transitions, 0 flow [2024-06-21 19:21:50,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 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) [2024-06-21 19:21:50,919 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (5 of 6 remaining) [2024-06-21 19:21:50,920 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (4 of 6 remaining) [2024-06-21 19:21:50,921 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 6 remaining) [2024-06-21 19:21:50,922 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 6 remaining) [2024-06-21 19:21:50,922 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 6 remaining) [2024-06-21 19:21:50,922 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 6 remaining) [2024-06-21 19:21:50,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-21 19:21:50,922 INFO L445 BasicCegarLoop]: Path program histogram: [6, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:21:50,926 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-06-21 19:21:50,926 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2024-06-21 19:21:50,929 INFO L507 ceAbstractionStarter]: Automizer considered 3 witness invariants [2024-06-21 19:21:50,929 INFO L508 ceAbstractionStarter]: WitnessConsidered=3 [2024-06-21 19:21:50,930 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.06 07:21:50 BasicIcfg [2024-06-21 19:21:50,930 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-06-21 19:21:50,930 INFO L158 Benchmark]: Toolchain (without parser) took 17542.91ms. Allocated memory was 165.7MB in the beginning and 723.5MB in the end (delta: 557.8MB). Free memory was 128.3MB in the beginning and 463.7MB in the end (delta: -335.5MB). Peak memory consumption was 222.4MB. Max. memory is 16.1GB. [2024-06-21 19:21:50,930 INFO L158 Benchmark]: Witness Parser took 0.18ms. Allocated memory is still 125.8MB. Free memory is still 88.1MB. There was no memory consumed. Max. memory is 16.1GB. [2024-06-21 19:21:50,930 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 125.8MB. Free memory is still 97.5MB. There was no memory consumed. Max. memory is 16.1GB. [2024-06-21 19:21:50,931 INFO L158 Benchmark]: CACSL2BoogieTranslator took 441.78ms. Allocated memory is still 165.7MB. Free memory was 128.3MB in the beginning and 98.0MB in the end (delta: 30.2MB). Peak memory consumption was 29.4MB. Max. memory is 16.1GB. [2024-06-21 19:21:50,931 INFO L158 Benchmark]: Boogie Procedure Inliner took 66.69ms. Allocated memory is still 165.7MB. Free memory was 98.0MB in the beginning and 94.8MB in the end (delta: 3.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2024-06-21 19:21:50,931 INFO L158 Benchmark]: Boogie Preprocessor took 39.60ms. Allocated memory is still 165.7MB. Free memory was 94.8MB in the beginning and 91.6MB in the end (delta: 3.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-06-21 19:21:50,932 INFO L158 Benchmark]: RCFGBuilder took 726.20ms. Allocated memory is still 165.7MB. Free memory was 91.6MB in the beginning and 122.8MB in the end (delta: -31.2MB). Peak memory consumption was 59.0MB. Max. memory is 16.1GB. [2024-06-21 19:21:50,932 INFO L158 Benchmark]: TraceAbstraction took 16263.80ms. Allocated memory was 165.7MB in the beginning and 723.5MB in the end (delta: 557.8MB). Free memory was 122.8MB in the beginning and 463.7MB in the end (delta: -340.9MB). Peak memory consumption was 218.0MB. Max. memory is 16.1GB. [2024-06-21 19:21:50,933 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Witness Parser took 0.18ms. Allocated memory is still 125.8MB. Free memory is still 88.1MB. There was no memory consumed. Max. memory is 16.1GB. * CDTParser took 0.13ms. Allocated memory is still 125.8MB. Free memory is still 97.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 441.78ms. Allocated memory is still 165.7MB. Free memory was 128.3MB in the beginning and 98.0MB in the end (delta: 30.2MB). Peak memory consumption was 29.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 66.69ms. Allocated memory is still 165.7MB. Free memory was 98.0MB in the beginning and 94.8MB in the end (delta: 3.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 39.60ms. Allocated memory is still 165.7MB. Free memory was 94.8MB in the beginning and 91.6MB in the end (delta: 3.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 726.20ms. Allocated memory is still 165.7MB. Free memory was 91.6MB in the beginning and 122.8MB in the end (delta: -31.2MB). Peak memory consumption was 59.0MB. Max. memory is 16.1GB. * TraceAbstraction took 16263.80ms. Allocated memory was 165.7MB in the beginning and 723.5MB in the end (delta: 557.8MB). Free memory was 122.8MB in the beginning and 463.7MB in the end (delta: -340.9MB). Peak memory consumption was 218.0MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 821]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 823]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 824]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 65 locations, 6 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 16.2s, OverallIterations: 29, TraceHistogramMax: 1, PathProgramHistogramMax: 6, EmptinessCheckTime: 0.0s, AutomataDifference: 6.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1009 SdHoareTripleChecker+Valid, 2.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 869 mSDsluCounter, 146 SdHoareTripleChecker+Invalid, 2.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 82 mSDsCounter, 215 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 3994 IncrementalHoareTripleChecker+Invalid, 4209 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 215 mSolverCounterUnsat, 64 mSDtfsCounter, 3994 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 130 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 1.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=946occurred in iteration=22, InterpolantAutomatonStates: 154, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 9.2s InterpolantComputationTime, 492 NumberOfCodeBlocks, 492 NumberOfCodeBlocksAsserted, 29 NumberOfCheckSat, 463 ConstructedInterpolants, 0 QuantifiedInterpolants, 8316 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 29 InterpolantComputations, 29 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 3 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2024-06-21 19:21:50,975 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE