./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe031_power.opt_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/safe031_power.opt_pso.opt_rmo.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7724a2de 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/safe031_power.opt_pso.opt_rmo.opt.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/safe031_power.opt_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-7724a2d-m [2024-06-28 00:38:01,137 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-28 00:38:01,191 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-28 00:38:01,195 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-28 00:38:01,195 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-28 00:38:01,211 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-28 00:38:01,212 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-28 00:38:01,213 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-28 00:38:01,213 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-28 00:38:01,214 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-28 00:38:01,214 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-28 00:38:01,214 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-28 00:38:01,215 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-28 00:38:01,215 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-28 00:38:01,216 INFO L153 SettingsManager]: * Use SBE=true [2024-06-28 00:38:01,216 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-28 00:38:01,217 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-28 00:38:01,217 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-28 00:38:01,218 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-28 00:38:01,218 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-28 00:38:01,218 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-28 00:38:01,219 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-28 00:38:01,219 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-28 00:38:01,220 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-28 00:38:01,220 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-28 00:38:01,221 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-28 00:38:01,221 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-28 00:38:01,221 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-28 00:38:01,222 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-28 00:38:01,222 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-28 00:38:01,222 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-28 00:38:01,223 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-28 00:38:01,223 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-28 00:38:01,223 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-28 00:38:01,223 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-28 00:38:01,224 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-28 00:38:01,224 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-28 00:38:01,224 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-28 00:38:01,224 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-28 00:38:01,225 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-28 00:38:01,225 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-28 00:38:01,225 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-28 00:38:01,226 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-28 00:38:01,226 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-28 00:38:01,426 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-28 00:38:01,445 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-28 00:38:01,448 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-28 00:38:01,449 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-28 00:38:01,449 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-28 00:38:01,450 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/safe031_power.opt_pso.opt_rmo.opt.yml/witness.yml [2024-06-28 00:38:01,562 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-28 00:38:01,562 INFO L274 PluginConnector]: CDTParser initialized [2024-06-28 00:38:01,564 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe031_power.opt_pso.opt_rmo.opt.i [2024-06-28 00:38:02,799 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-28 00:38:03,094 INFO L384 CDTParser]: Found 1 translation units. [2024-06-28 00:38:03,095 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe031_power.opt_pso.opt_rmo.opt.i [2024-06-28 00:38:03,115 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5803094e1/8ef3563567ee4a179273140ecadc4190/FLAGcd8c9e540 [2024-06-28 00:38:03,125 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5803094e1/8ef3563567ee4a179273140ecadc4190 [2024-06-28 00:38:03,125 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-28 00:38:03,126 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-28 00:38:03,127 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-28 00:38:03,127 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-28 00:38:03,136 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-28 00:38:03,136 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 12:38:01" (1/2) ... [2024-06-28 00:38:03,137 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ec569e1 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:38:03, skipping insertion in model container [2024-06-28 00:38:03,138 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 12:38:01" (1/2) ... [2024-06-28 00:38:03,139 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@2c68134c and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:38:03, skipping insertion in model container [2024-06-28 00:38:03,140 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.06 12:38:03" (2/2) ... [2024-06-28 00:38:03,141 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ec569e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 12:38:03, skipping insertion in model container [2024-06-28 00:38:03,141 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.06 12:38:03" (2/2) ... [2024-06-28 00:38:03,142 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-28 00:38:03,164 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-28 00:38:03,165 INFO L97 edCorrectnessWitness]: Location invariant before [L818-L818] ! multithreaded || (((((((((((((0LL - (long long )__unbuffered_p0_EAX) + (long long )x >= 0LL && (0LL - (long long )y$r_buff0_thd3) + (long long )y$w_buff0 >= 0LL) && (0LL - (long long )y$r_buff1_thd3) + (long long )y$w_buff0 >= 0LL) && (0LL - (long long )y$r_buff1_thd3) + (long long )y$w_buff1 >= 0LL) && (long long )y$r_buff0_thd3 - (long long )y$r_buff1_thd3 >= 0LL) && (long long )y$r_buff0_thd3 - (long long )y$w_buff0_used >= 0LL) && (long long )y$r_buff0_thd3 - (long long )y$w_buff1_used >= 0LL) && (long long )y$r_buff1_thd3 - (long long )y$w_buff1_used >= 0LL) && (long long )y$w_buff0 - (long long )y$w_buff0_used >= 0LL) && (long long )y$w_buff0 - (long long )y$w_buff1 >= 0LL) && (long long )y$w_buff0 - (long long )y$w_buff1_used >= 0LL) && (long long )y$w_buff0_used - (long long )y$w_buff1_used >= 0LL) && (long long )y$w_buff1 - (long long )y$w_buff1_used >= 0LL) [2024-06-28 00:38:03,166 INFO L97 edCorrectnessWitness]: Location invariant before [L820-L820] ! multithreaded || (((((((((((((0LL - (long long )__unbuffered_p0_EAX) + (long long )x >= 0LL && (0LL - (long long )y$r_buff0_thd3) + (long long )y$w_buff0 >= 0LL) && (0LL - (long long )y$r_buff1_thd3) + (long long )y$w_buff0 >= 0LL) && (0LL - (long long )y$r_buff1_thd3) + (long long )y$w_buff1 >= 0LL) && (long long )y$r_buff0_thd3 - (long long )y$r_buff1_thd3 >= 0LL) && (long long )y$r_buff0_thd3 - (long long )y$w_buff0_used >= 0LL) && (long long )y$r_buff0_thd3 - (long long )y$w_buff1_used >= 0LL) && (long long )y$r_buff1_thd3 - (long long )y$w_buff1_used >= 0LL) && (long long )y$w_buff0 - (long long )y$w_buff0_used >= 0LL) && (long long )y$w_buff0 - (long long )y$w_buff1 >= 0LL) && (long long )y$w_buff0 - (long long )y$w_buff1_used >= 0LL) && (long long )y$w_buff0_used - (long long )y$w_buff1_used >= 0LL) && (long long )y$w_buff1 - (long long )y$w_buff1_used >= 0LL) [2024-06-28 00:38:03,166 INFO L97 edCorrectnessWitness]: Location invariant before [L821-L821] ! multithreaded || (((((((((((((0LL - (long long )__unbuffered_p0_EAX) + (long long )x >= 0LL && (0LL - (long long )y$r_buff0_thd3) + (long long )y$w_buff0 >= 0LL) && (0LL - (long long )y$r_buff1_thd3) + (long long )y$w_buff0 >= 0LL) && (0LL - (long long )y$r_buff1_thd3) + (long long )y$w_buff1 >= 0LL) && (long long )y$r_buff0_thd3 - (long long )y$r_buff1_thd3 >= 0LL) && (long long )y$r_buff0_thd3 - (long long )y$w_buff0_used >= 0LL) && (long long )y$r_buff0_thd3 - (long long )y$w_buff1_used >= 0LL) && (long long )y$r_buff1_thd3 - (long long )y$w_buff1_used >= 0LL) && (long long )y$w_buff0 - (long long )y$w_buff0_used >= 0LL) && (long long )y$w_buff0 - (long long )y$w_buff1 >= 0LL) && (long long )y$w_buff0 - (long long )y$w_buff1_used >= 0LL) && (long long )y$w_buff0_used - (long long )y$w_buff1_used >= 0LL) && (long long )y$w_buff1 - (long long )y$w_buff1_used >= 0LL) [2024-06-28 00:38:03,166 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-28 00:38:03,166 INFO L106 edCorrectnessWitness]: ghost_update [L816-L816] multithreaded = 1; [2024-06-28 00:38:03,202 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-28 00:38:03,569 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-28 00:38:03,583 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-28 00:38:03,700 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-28 00:38:03,756 INFO L206 MainTranslator]: Completed translation [2024-06-28 00:38:03,757 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 12:38:03 WrapperNode [2024-06-28 00:38:03,757 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-28 00:38:03,758 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-28 00:38:03,758 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-28 00:38:03,759 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-28 00:38:03,770 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 12:38:03" (1/1) ... [2024-06-28 00:38:03,789 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 12:38:03" (1/1) ... [2024-06-28 00:38:03,827 INFO L138 Inliner]: procedures = 175, calls = 45, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 143 [2024-06-28 00:38:03,828 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-28 00:38:03,829 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-28 00:38:03,829 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-28 00:38:03,829 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-28 00:38:03,838 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 12:38:03" (1/1) ... [2024-06-28 00:38:03,838 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 12:38:03" (1/1) ... [2024-06-28 00:38:03,841 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 12:38:03" (1/1) ... [2024-06-28 00:38:03,855 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]. [2024-06-28 00:38:03,855 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 12:38:03" (1/1) ... [2024-06-28 00:38:03,855 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 12:38:03" (1/1) ... [2024-06-28 00:38:03,862 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 12:38:03" (1/1) ... [2024-06-28 00:38:03,868 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 12:38:03" (1/1) ... [2024-06-28 00:38:03,869 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 12:38:03" (1/1) ... [2024-06-28 00:38:03,871 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 12:38:03" (1/1) ... [2024-06-28 00:38:03,873 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-28 00:38:03,874 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-28 00:38:03,874 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-28 00:38:03,874 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-28 00:38:03,875 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 12:38:03" (1/1) ... [2024-06-28 00:38:03,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-28 00:38:03,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 00:38:03,950 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) [2024-06-28 00:38:03,999 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 [2024-06-28 00:38:04,026 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-28 00:38:04,026 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-28 00:38:04,026 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-28 00:38:04,026 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-28 00:38:04,027 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-28 00:38:04,027 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-28 00:38:04,027 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-28 00:38:04,027 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-28 00:38:04,027 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-28 00:38:04,027 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-28 00:38:04,027 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-28 00:38:04,027 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-28 00:38:04,028 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-28 00:38:04,121 INFO L244 CfgBuilder]: Building ICFG [2024-06-28 00:38:04,123 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-28 00:38:04,444 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-28 00:38:04,444 INFO L293 CfgBuilder]: Performing block encoding [2024-06-28 00:38:04,625 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-28 00:38:04,626 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-28 00:38:04,626 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.06 12:38:04 BoogieIcfgContainer [2024-06-28 00:38:04,626 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-28 00:38:04,629 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-28 00:38:04,629 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-28 00:38:04,632 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-28 00:38:04,632 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 12:38:01" (1/4) ... [2024-06-28 00:38:04,663 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@96516de and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 28.06 12:38:04, skipping insertion in model container [2024-06-28 00:38:04,663 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.06 12:38:03" (2/4) ... [2024-06-28 00:38:04,664 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@96516de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.06 12:38:04, skipping insertion in model container [2024-06-28 00:38:04,664 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 12:38:03" (3/4) ... [2024-06-28 00:38:04,664 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@96516de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.06 12:38:04, skipping insertion in model container [2024-06-28 00:38:04,664 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.06 12:38:04" (4/4) ... [2024-06-28 00:38:04,665 INFO L112 eAbstractionObserver]: Analyzing ICFG safe031_power.opt_pso.opt_rmo.opt.i [2024-06-28 00:38:04,691 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-28 00:38:04,691 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-28 00:38:04,691 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-28 00:38:04,720 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-28 00:38:04,743 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 51 places, 41 transitions, 94 flow [2024-06-28 00:38:04,762 INFO L124 PetriNetUnfolderBase]: 0/38 cut-off events. [2024-06-28 00:38:04,762 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-28 00:38:04,764 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48 conditions, 38 events. 0/38 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 70 event pairs, 0 based on Foata normal form. 0/35 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-28 00:38:04,765 INFO L82 GeneralOperation]: Start removeDead. Operand has 51 places, 41 transitions, 94 flow [2024-06-28 00:38:04,767 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 42 places, 32 transitions, 73 flow [2024-06-28 00:38:04,773 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-28 00:38:04,778 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;@4d8c5a58, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-28 00:38:04,778 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-28 00:38:04,781 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-28 00:38:04,781 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-28 00:38:04,781 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-28 00:38:04,781 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:38:04,782 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-28 00:38:04,782 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)] === [2024-06-28 00:38:04,786 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:38:04,786 INFO L85 PathProgramCache]: Analyzing trace with hash 364147537, now seen corresponding path program 1 times [2024-06-28 00:38:04,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:38:04,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553076821] [2024-06-28 00:38:04,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:38:04,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:38:04,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:38:05,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:38:05,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:38:05,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553076821] [2024-06-28 00:38:05,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553076821] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:38:05,257 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:38:05,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-28 00:38:05,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600725756] [2024-06-28 00:38:05,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:38:05,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-28 00:38:05,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:38:05,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-28 00:38:05,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-28 00:38:05,304 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 41 [2024-06-28 00:38:05,307 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 32 transitions, 73 flow. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 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) [2024-06-28 00:38:05,308 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:38:05,308 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 41 [2024-06-28 00:38:05,309 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:38:05,445 INFO L124 PetriNetUnfolderBase]: 196/390 cut-off events. [2024-06-28 00:38:05,446 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-06-28 00:38:05,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 744 conditions, 390 events. 196/390 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 2251 event pairs, 73 based on Foata normal form. 2/371 useless extension candidates. Maximal degree in co-relation 732. Up to 304 conditions per place. [2024-06-28 00:38:05,452 INFO L140 encePairwiseOnDemand]: 35/41 looper letters, 22 selfloop transitions, 3 changer transitions 0/38 dead transitions. [2024-06-28 00:38:05,452 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 38 transitions, 138 flow [2024-06-28 00:38:05,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-28 00:38:05,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-28 00:38:05,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 82 transitions. [2024-06-28 00:38:05,466 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-06-28 00:38:05,468 INFO L175 Difference]: Start difference. First operand has 42 places, 32 transitions, 73 flow. Second operand 3 states and 82 transitions. [2024-06-28 00:38:05,468 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 38 transitions, 138 flow [2024-06-28 00:38:05,470 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 38 transitions, 134 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-28 00:38:05,471 INFO L231 Difference]: Finished difference. Result has 41 places, 33 transitions, 89 flow [2024-06-28 00:38:05,473 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, 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=89, PETRI_PLACES=41, PETRI_TRANSITIONS=33} [2024-06-28 00:38:05,475 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, -1 predicate places. [2024-06-28 00:38:05,476 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 33 transitions, 89 flow [2024-06-28 00:38:05,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 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) [2024-06-28 00:38:05,476 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:38:05,476 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:38:05,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-28 00:38:05,476 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:38:05,477 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:38:05,477 INFO L85 PathProgramCache]: Analyzing trace with hash 963480261, now seen corresponding path program 1 times [2024-06-28 00:38:05,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:38:05,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182638700] [2024-06-28 00:38:05,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:38:05,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:38:05,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:38:05,862 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:38:05,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:38:05,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182638700] [2024-06-28 00:38:05,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182638700] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:38:05,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:38:05,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 00:38:05,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82122377] [2024-06-28 00:38:05,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:38:05,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 00:38:05,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:38:05,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 00:38:05,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-28 00:38:05,889 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-28 00:38:05,891 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 33 transitions, 89 flow. Second operand has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 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) [2024-06-28 00:38:05,891 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:38:05,891 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-28 00:38:05,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:38:06,137 INFO L124 PetriNetUnfolderBase]: 313/615 cut-off events. [2024-06-28 00:38:06,137 INFO L125 PetriNetUnfolderBase]: For 81/81 co-relation queries the response was YES. [2024-06-28 00:38:06,139 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1297 conditions, 615 events. 313/615 cut-off events. For 81/81 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 3397 event pairs, 131 based on Foata normal form. 6/609 useless extension candidates. Maximal degree in co-relation 1284. Up to 468 conditions per place. [2024-06-28 00:38:06,143 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 32 selfloop transitions, 9 changer transitions 0/52 dead transitions. [2024-06-28 00:38:06,144 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 52 transitions, 223 flow [2024-06-28 00:38:06,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 00:38:06,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 00:38:06,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 116 transitions. [2024-06-28 00:38:06,146 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5658536585365853 [2024-06-28 00:38:06,146 INFO L175 Difference]: Start difference. First operand has 41 places, 33 transitions, 89 flow. Second operand 5 states and 116 transitions. [2024-06-28 00:38:06,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 52 transitions, 223 flow [2024-06-28 00:38:06,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 52 transitions, 218 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-28 00:38:06,148 INFO L231 Difference]: Finished difference. Result has 47 places, 40 transitions, 150 flow [2024-06-28 00:38:06,149 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=150, PETRI_PLACES=47, PETRI_TRANSITIONS=40} [2024-06-28 00:38:06,149 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 5 predicate places. [2024-06-28 00:38:06,149 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 40 transitions, 150 flow [2024-06-28 00:38:06,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 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) [2024-06-28 00:38:06,150 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:38:06,150 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:38:06,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-28 00:38:06,151 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:38:06,151 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:38:06,151 INFO L85 PathProgramCache]: Analyzing trace with hash -555715092, now seen corresponding path program 1 times [2024-06-28 00:38:06,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:38:06,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056319032] [2024-06-28 00:38:06,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:38:06,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:38:06,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:38:06,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:38:06,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:38:06,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056319032] [2024-06-28 00:38:06,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056319032] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:38:06,429 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:38:06,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-28 00:38:06,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546412402] [2024-06-28 00:38:06,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:38:06,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-28 00:38:06,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:38:06,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-28 00:38:06,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-28 00:38:06,445 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 41 [2024-06-28 00:38:06,446 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 40 transitions, 150 flow. Second operand has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 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) [2024-06-28 00:38:06,446 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:38:06,446 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 41 [2024-06-28 00:38:06,447 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:38:06,553 INFO L124 PetriNetUnfolderBase]: 262/545 cut-off events. [2024-06-28 00:38:06,554 INFO L125 PetriNetUnfolderBase]: For 236/238 co-relation queries the response was YES. [2024-06-28 00:38:06,556 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1255 conditions, 545 events. 262/545 cut-off events. For 236/238 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2941 event pairs, 95 based on Foata normal form. 3/540 useless extension candidates. Maximal degree in co-relation 1237. Up to 393 conditions per place. [2024-06-28 00:38:06,559 INFO L140 encePairwiseOnDemand]: 36/41 looper letters, 26 selfloop transitions, 7 changer transitions 0/49 dead transitions. [2024-06-28 00:38:06,559 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 49 transitions, 238 flow [2024-06-28 00:38:06,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-28 00:38:06,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-28 00:38:06,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 102 transitions. [2024-06-28 00:38:06,561 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6219512195121951 [2024-06-28 00:38:06,561 INFO L175 Difference]: Start difference. First operand has 47 places, 40 transitions, 150 flow. Second operand 4 states and 102 transitions. [2024-06-28 00:38:06,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 49 transitions, 238 flow [2024-06-28 00:38:06,563 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 49 transitions, 238 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-06-28 00:38:06,564 INFO L231 Difference]: Finished difference. Result has 51 places, 42 transitions, 180 flow [2024-06-28 00:38:06,564 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=180, PETRI_PLACES=51, PETRI_TRANSITIONS=42} [2024-06-28 00:38:06,565 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 9 predicate places. [2024-06-28 00:38:06,565 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 42 transitions, 180 flow [2024-06-28 00:38:06,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 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) [2024-06-28 00:38:06,566 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:38:06,566 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:38:06,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-28 00:38:06,566 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)] === [2024-06-28 00:38:06,567 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:38:06,567 INFO L85 PathProgramCache]: Analyzing trace with hash 1372831047, now seen corresponding path program 1 times [2024-06-28 00:38:06,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:38:06,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913688030] [2024-06-28 00:38:06,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:38:06,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:38:06,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:38:06,878 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:38:06,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:38:06,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913688030] [2024-06-28 00:38:06,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913688030] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:38:06,879 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:38:06,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:38:06,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66785846] [2024-06-28 00:38:06,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:38:06,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:38:06,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:38:06,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:38:06,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:38:06,918 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-28 00:38:06,918 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 42 transitions, 180 flow. Second operand has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 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) [2024-06-28 00:38:06,919 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:38:06,919 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-28 00:38:06,919 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:38:07,168 INFO L124 PetriNetUnfolderBase]: 364/721 cut-off events. [2024-06-28 00:38:07,169 INFO L125 PetriNetUnfolderBase]: For 637/640 co-relation queries the response was YES. [2024-06-28 00:38:07,171 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1878 conditions, 721 events. 364/721 cut-off events. For 637/640 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 4145 event pairs, 103 based on Foata normal form. 14/727 useless extension candidates. Maximal degree in co-relation 1856. Up to 470 conditions per place. [2024-06-28 00:38:07,175 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 41 selfloop transitions, 12 changer transitions 0/64 dead transitions. [2024-06-28 00:38:07,175 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 64 transitions, 355 flow [2024-06-28 00:38:07,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:38:07,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:38:07,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 153 transitions. [2024-06-28 00:38:07,177 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5331010452961672 [2024-06-28 00:38:07,177 INFO L175 Difference]: Start difference. First operand has 51 places, 42 transitions, 180 flow. Second operand 7 states and 153 transitions. [2024-06-28 00:38:07,178 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 64 transitions, 355 flow [2024-06-28 00:38:07,180 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 64 transitions, 340 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-06-28 00:38:07,181 INFO L231 Difference]: Finished difference. Result has 56 places, 45 transitions, 220 flow [2024-06-28 00:38:07,181 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=220, PETRI_PLACES=56, PETRI_TRANSITIONS=45} [2024-06-28 00:38:07,182 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 14 predicate places. [2024-06-28 00:38:07,182 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 45 transitions, 220 flow [2024-06-28 00:38:07,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 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) [2024-06-28 00:38:07,183 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:38:07,183 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:38:07,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-28 00:38:07,183 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)] === [2024-06-28 00:38:07,184 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:38:07,184 INFO L85 PathProgramCache]: Analyzing trace with hash 1600909827, now seen corresponding path program 2 times [2024-06-28 00:38:07,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:38:07,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063412254] [2024-06-28 00:38:07,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:38:07,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:38:07,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:38:07,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:38:07,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:38:07,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063412254] [2024-06-28 00:38:07,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063412254] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:38:07,468 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:38:07,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:38:07,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824481395] [2024-06-28 00:38:07,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:38:07,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:38:07,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:38:07,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:38:07,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:38:07,489 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-28 00:38:07,490 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 45 transitions, 220 flow. Second operand has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 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) [2024-06-28 00:38:07,490 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:38:07,490 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-28 00:38:07,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:38:07,727 INFO L124 PetriNetUnfolderBase]: 405/810 cut-off events. [2024-06-28 00:38:07,727 INFO L125 PetriNetUnfolderBase]: For 962/965 co-relation queries the response was YES. [2024-06-28 00:38:07,730 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2176 conditions, 810 events. 405/810 cut-off events. For 962/965 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 4920 event pairs, 41 based on Foata normal form. 14/820 useless extension candidates. Maximal degree in co-relation 2152. Up to 345 conditions per place. [2024-06-28 00:38:07,734 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 38 selfloop transitions, 15 changer transitions 0/64 dead transitions. [2024-06-28 00:38:07,734 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 64 transitions, 382 flow [2024-06-28 00:38:07,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:38:07,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:38:07,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 136 transitions. [2024-06-28 00:38:07,736 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5528455284552846 [2024-06-28 00:38:07,736 INFO L175 Difference]: Start difference. First operand has 56 places, 45 transitions, 220 flow. Second operand 6 states and 136 transitions. [2024-06-28 00:38:07,736 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 64 transitions, 382 flow [2024-06-28 00:38:07,739 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 64 transitions, 355 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-28 00:38:07,740 INFO L231 Difference]: Finished difference. Result has 58 places, 46 transitions, 239 flow [2024-06-28 00:38:07,740 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=193, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=239, PETRI_PLACES=58, PETRI_TRANSITIONS=46} [2024-06-28 00:38:07,741 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 16 predicate places. [2024-06-28 00:38:07,741 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 46 transitions, 239 flow [2024-06-28 00:38:07,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 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) [2024-06-28 00:38:07,742 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:38:07,742 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:38:07,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-28 00:38:07,742 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)] === [2024-06-28 00:38:07,743 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:38:07,743 INFO L85 PathProgramCache]: Analyzing trace with hash -35001331, now seen corresponding path program 3 times [2024-06-28 00:38:07,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:38:07,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437155873] [2024-06-28 00:38:07,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:38:07,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:38:07,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:38:07,987 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:38:07,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:38:07,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437155873] [2024-06-28 00:38:07,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437155873] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:38:07,988 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:38:07,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:38:07,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419195171] [2024-06-28 00:38:07,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:38:07,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:38:07,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:38:07,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:38:07,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:38:08,008 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-28 00:38:08,009 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 46 transitions, 239 flow. Second operand has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 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) [2024-06-28 00:38:08,009 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:38:08,009 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-28 00:38:08,009 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:38:08,242 INFO L124 PetriNetUnfolderBase]: 385/776 cut-off events. [2024-06-28 00:38:08,243 INFO L125 PetriNetUnfolderBase]: For 1147/1150 co-relation queries the response was YES. [2024-06-28 00:38:08,245 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2116 conditions, 776 events. 385/776 cut-off events. For 1147/1150 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 4629 event pairs, 38 based on Foata normal form. 14/786 useless extension candidates. Maximal degree in co-relation 2091. Up to 413 conditions per place. [2024-06-28 00:38:08,249 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 33 selfloop transitions, 14 changer transitions 0/58 dead transitions. [2024-06-28 00:38:08,249 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 58 transitions, 353 flow [2024-06-28 00:38:08,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:38:08,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:38:08,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 130 transitions. [2024-06-28 00:38:08,251 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5284552845528455 [2024-06-28 00:38:08,251 INFO L175 Difference]: Start difference. First operand has 58 places, 46 transitions, 239 flow. Second operand 6 states and 130 transitions. [2024-06-28 00:38:08,251 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 58 transitions, 353 flow [2024-06-28 00:38:08,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 58 transitions, 328 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-28 00:38:08,255 INFO L231 Difference]: Finished difference. Result has 60 places, 45 transitions, 241 flow [2024-06-28 00:38:08,255 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=241, PETRI_PLACES=60, PETRI_TRANSITIONS=45} [2024-06-28 00:38:08,256 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 18 predicate places. [2024-06-28 00:38:08,256 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 45 transitions, 241 flow [2024-06-28 00:38:08,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 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) [2024-06-28 00:38:08,257 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:38:08,257 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:38:08,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-28 00:38:08,257 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:38:08,258 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:38:08,258 INFO L85 PathProgramCache]: Analyzing trace with hash 1631682401, now seen corresponding path program 1 times [2024-06-28 00:38:08,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:38:08,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829212579] [2024-06-28 00:38:08,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:38:08,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:38:08,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:38:08,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:38:08,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:38:08,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829212579] [2024-06-28 00:38:08,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829212579] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:38:08,503 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:38:08,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 00:38:08,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256342607] [2024-06-28 00:38:08,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:38:08,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 00:38:08,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:38:08,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 00:38:08,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-28 00:38:08,519 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 41 [2024-06-28 00:38:08,519 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 45 transitions, 241 flow. Second operand has 5 states, 5 states have (on average 19.4) internal successors, (97), 5 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) [2024-06-28 00:38:08,519 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:38:08,519 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 41 [2024-06-28 00:38:08,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:38:08,666 INFO L124 PetriNetUnfolderBase]: 398/799 cut-off events. [2024-06-28 00:38:08,667 INFO L125 PetriNetUnfolderBase]: For 1363/1366 co-relation queries the response was YES. [2024-06-28 00:38:08,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2247 conditions, 799 events. 398/799 cut-off events. For 1363/1366 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 4772 event pairs, 150 based on Foata normal form. 3/793 useless extension candidates. Maximal degree in co-relation 2221. Up to 605 conditions per place. [2024-06-28 00:38:08,673 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 40 selfloop transitions, 10 changer transitions 0/62 dead transitions. [2024-06-28 00:38:08,673 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 62 transitions, 385 flow [2024-06-28 00:38:08,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 00:38:08,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 00:38:08,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 127 transitions. [2024-06-28 00:38:08,674 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6195121951219512 [2024-06-28 00:38:08,675 INFO L175 Difference]: Start difference. First operand has 60 places, 45 transitions, 241 flow. Second operand 5 states and 127 transitions. [2024-06-28 00:38:08,675 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 62 transitions, 385 flow [2024-06-28 00:38:08,678 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 62 transitions, 355 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-06-28 00:38:08,679 INFO L231 Difference]: Finished difference. Result has 60 places, 48 transitions, 253 flow [2024-06-28 00:38:08,679 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=211, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=253, PETRI_PLACES=60, PETRI_TRANSITIONS=48} [2024-06-28 00:38:08,680 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 18 predicate places. [2024-06-28 00:38:08,680 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 48 transitions, 253 flow [2024-06-28 00:38:08,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.4) internal successors, (97), 5 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) [2024-06-28 00:38:08,681 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:38:08,681 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:38:08,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-28 00:38:08,681 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:38:08,682 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:38:08,682 INFO L85 PathProgramCache]: Analyzing trace with hash 1637396321, now seen corresponding path program 2 times [2024-06-28 00:38:08,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:38:08,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891131674] [2024-06-28 00:38:08,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:38:08,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:38:08,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:38:08,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:38:08,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:38:08,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891131674] [2024-06-28 00:38:08,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891131674] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:38:08,951 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:38:08,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 00:38:08,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752495271] [2024-06-28 00:38:08,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:38:08,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 00:38:08,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:38:08,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 00:38:08,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-28 00:38:08,974 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 41 [2024-06-28 00:38:08,974 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 48 transitions, 253 flow. Second operand has 5 states, 5 states have (on average 19.4) internal successors, (97), 5 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) [2024-06-28 00:38:08,974 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:38:08,974 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 41 [2024-06-28 00:38:08,975 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:38:09,115 INFO L124 PetriNetUnfolderBase]: 395/790 cut-off events. [2024-06-28 00:38:09,115 INFO L125 PetriNetUnfolderBase]: For 1349/1352 co-relation queries the response was YES. [2024-06-28 00:38:09,118 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2328 conditions, 790 events. 395/790 cut-off events. For 1349/1352 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 4753 event pairs, 162 based on Foata normal form. 1/780 useless extension candidates. Maximal degree in co-relation 2302. Up to 595 conditions per place. [2024-06-28 00:38:09,121 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 38 selfloop transitions, 15 changer transitions 0/65 dead transitions. [2024-06-28 00:38:09,122 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 65 transitions, 417 flow [2024-06-28 00:38:09,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 00:38:09,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 00:38:09,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 126 transitions. [2024-06-28 00:38:09,123 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6146341463414634 [2024-06-28 00:38:09,123 INFO L175 Difference]: Start difference. First operand has 60 places, 48 transitions, 253 flow. Second operand 5 states and 126 transitions. [2024-06-28 00:38:09,123 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 65 transitions, 417 flow [2024-06-28 00:38:09,126 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 65 transitions, 395 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-28 00:38:09,127 INFO L231 Difference]: Finished difference. Result has 63 places, 54 transitions, 315 flow [2024-06-28 00:38:09,127 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=231, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=315, PETRI_PLACES=63, PETRI_TRANSITIONS=54} [2024-06-28 00:38:09,128 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 21 predicate places. [2024-06-28 00:38:09,128 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 54 transitions, 315 flow [2024-06-28 00:38:09,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.4) internal successors, (97), 5 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) [2024-06-28 00:38:09,128 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:38:09,128 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:38:09,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-28 00:38:09,129 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:38:09,129 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:38:09,129 INFO L85 PathProgramCache]: Analyzing trace with hash 1637404257, now seen corresponding path program 1 times [2024-06-28 00:38:09,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:38:09,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654606383] [2024-06-28 00:38:09,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:38:09,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:38:09,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:38:09,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:38:09,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:38:09,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654606383] [2024-06-28 00:38:09,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654606383] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:38:09,659 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:38:09,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:38:09,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705927720] [2024-06-28 00:38:09,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:38:09,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:38:09,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:38:09,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:38:09,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:38:09,692 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 41 [2024-06-28 00:38:09,692 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 54 transitions, 315 flow. Second operand has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 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) [2024-06-28 00:38:09,692 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:38:09,692 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 41 [2024-06-28 00:38:09,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:38:09,856 INFO L124 PetriNetUnfolderBase]: 344/707 cut-off events. [2024-06-28 00:38:09,856 INFO L125 PetriNetUnfolderBase]: For 1519/1528 co-relation queries the response was YES. [2024-06-28 00:38:09,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2136 conditions, 707 events. 344/707 cut-off events. For 1519/1528 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 4193 event pairs, 88 based on Foata normal form. 13/699 useless extension candidates. Maximal degree in co-relation 2108. Up to 462 conditions per place. [2024-06-28 00:38:09,860 INFO L140 encePairwiseOnDemand]: 35/41 looper letters, 33 selfloop transitions, 13 changer transitions 0/64 dead transitions. [2024-06-28 00:38:09,861 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 64 transitions, 429 flow [2024-06-28 00:38:09,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:38:09,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:38:09,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 135 transitions. [2024-06-28 00:38:09,862 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5487804878048781 [2024-06-28 00:38:09,862 INFO L175 Difference]: Start difference. First operand has 63 places, 54 transitions, 315 flow. Second operand 6 states and 135 transitions. [2024-06-28 00:38:09,862 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 64 transitions, 429 flow [2024-06-28 00:38:09,863 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 64 transitions, 403 flow, removed 7 selfloop flow, removed 2 redundant places. [2024-06-28 00:38:09,864 INFO L231 Difference]: Finished difference. Result has 67 places, 54 transitions, 320 flow [2024-06-28 00:38:09,864 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=289, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=320, PETRI_PLACES=67, PETRI_TRANSITIONS=54} [2024-06-28 00:38:09,865 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 25 predicate places. [2024-06-28 00:38:09,865 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 54 transitions, 320 flow [2024-06-28 00:38:09,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 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) [2024-06-28 00:38:09,865 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:38:09,865 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:38:09,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-28 00:38:09,866 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:38:09,866 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:38:09,866 INFO L85 PathProgramCache]: Analyzing trace with hash 380037058, now seen corresponding path program 1 times [2024-06-28 00:38:09,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:38:09,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855704501] [2024-06-28 00:38:09,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:38:09,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:38:09,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:38:10,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:38:10,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:38:10,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855704501] [2024-06-28 00:38:10,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855704501] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:38:10,406 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:38:10,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:38:10,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609007566] [2024-06-28 00:38:10,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:38:10,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:38:10,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:38:10,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:38:10,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:38:10,468 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 41 [2024-06-28 00:38:10,468 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 54 transitions, 320 flow. Second operand has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 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) [2024-06-28 00:38:10,468 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:38:10,468 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 41 [2024-06-28 00:38:10,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:38:10,630 INFO L124 PetriNetUnfolderBase]: 410/828 cut-off events. [2024-06-28 00:38:10,637 INFO L125 PetriNetUnfolderBase]: For 2033/2036 co-relation queries the response was YES. [2024-06-28 00:38:10,639 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2592 conditions, 828 events. 410/828 cut-off events. For 2033/2036 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 5011 event pairs, 153 based on Foata normal form. 8/827 useless extension candidates. Maximal degree in co-relation 2563. Up to 590 conditions per place. [2024-06-28 00:38:10,642 INFO L140 encePairwiseOnDemand]: 35/41 looper letters, 51 selfloop transitions, 12 changer transitions 0/75 dead transitions. [2024-06-28 00:38:10,656 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 75 transitions, 516 flow [2024-06-28 00:38:10,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:38:10,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:38:10,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-28 00:38:10,657 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-28 00:38:10,657 INFO L175 Difference]: Start difference. First operand has 67 places, 54 transitions, 320 flow. Second operand 6 states and 150 transitions. [2024-06-28 00:38:10,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 75 transitions, 516 flow [2024-06-28 00:38:10,660 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 75 transitions, 489 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-28 00:38:10,661 INFO L231 Difference]: Finished difference. Result has 70 places, 57 transitions, 353 flow [2024-06-28 00:38:10,661 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=293, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=353, PETRI_PLACES=70, PETRI_TRANSITIONS=57} [2024-06-28 00:38:10,661 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 28 predicate places. [2024-06-28 00:38:10,661 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 57 transitions, 353 flow [2024-06-28 00:38:10,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 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) [2024-06-28 00:38:10,661 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:38:10,661 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:38:10,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-28 00:38:10,662 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:38:10,662 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:38:10,662 INFO L85 PathProgramCache]: Analyzing trace with hash -296653590, now seen corresponding path program 2 times [2024-06-28 00:38:10,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:38:10,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138499677] [2024-06-28 00:38:10,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:38:10,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:38:10,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:38:11,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:38:11,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:38:11,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138499677] [2024-06-28 00:38:11,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138499677] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:38:11,307 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:38:11,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:38:11,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214147217] [2024-06-28 00:38:11,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:38:11,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:38:11,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:38:11,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:38:11,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:38:11,330 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 41 [2024-06-28 00:38:11,330 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 57 transitions, 353 flow. Second operand has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 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) [2024-06-28 00:38:11,331 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:38:11,331 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 41 [2024-06-28 00:38:11,331 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:38:11,500 INFO L124 PetriNetUnfolderBase]: 425/856 cut-off events. [2024-06-28 00:38:11,500 INFO L125 PetriNetUnfolderBase]: For 2761/2764 co-relation queries the response was YES. [2024-06-28 00:38:11,502 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2783 conditions, 856 events. 425/856 cut-off events. For 2761/2764 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 5253 event pairs, 170 based on Foata normal form. 8/853 useless extension candidates. Maximal degree in co-relation 2753. Up to 607 conditions per place. [2024-06-28 00:38:11,505 INFO L140 encePairwiseOnDemand]: 35/41 looper letters, 46 selfloop transitions, 18 changer transitions 0/76 dead transitions. [2024-06-28 00:38:11,506 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 76 transitions, 551 flow [2024-06-28 00:38:11,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:38:11,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:38:11,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-28 00:38:11,507 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-28 00:38:11,507 INFO L175 Difference]: Start difference. First operand has 70 places, 57 transitions, 353 flow. Second operand 6 states and 150 transitions. [2024-06-28 00:38:11,508 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 76 transitions, 551 flow [2024-06-28 00:38:11,510 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 76 transitions, 537 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-28 00:38:11,514 INFO L231 Difference]: Finished difference. Result has 75 places, 60 transitions, 417 flow [2024-06-28 00:38:11,514 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=339, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=417, PETRI_PLACES=75, PETRI_TRANSITIONS=60} [2024-06-28 00:38:11,514 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 33 predicate places. [2024-06-28 00:38:11,514 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 60 transitions, 417 flow [2024-06-28 00:38:11,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 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) [2024-06-28 00:38:11,515 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:38:11,515 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:38:11,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-28 00:38:11,516 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:38:11,516 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:38:11,516 INFO L85 PathProgramCache]: Analyzing trace with hash 1587490464, now seen corresponding path program 1 times [2024-06-28 00:38:11,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:38:11,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695492857] [2024-06-28 00:38:11,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:38:11,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:38:11,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:38:11,887 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:38:11,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:38:11,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695492857] [2024-06-28 00:38:11,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695492857] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:38:11,888 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:38:11,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:38:11,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536891944] [2024-06-28 00:38:11,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:38:11,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:38:11,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:38:11,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:38:11,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:38:11,909 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 41 [2024-06-28 00:38:11,910 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 60 transitions, 417 flow. Second operand has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 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) [2024-06-28 00:38:11,910 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:38:11,910 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 41 [2024-06-28 00:38:11,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:38:12,119 INFO L124 PetriNetUnfolderBase]: 436/885 cut-off events. [2024-06-28 00:38:12,120 INFO L125 PetriNetUnfolderBase]: For 3055/3058 co-relation queries the response was YES. [2024-06-28 00:38:12,122 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2968 conditions, 885 events. 436/885 cut-off events. For 3055/3058 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 5454 event pairs, 165 based on Foata normal form. 6/880 useless extension candidates. Maximal degree in co-relation 2935. Up to 588 conditions per place. [2024-06-28 00:38:12,125 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 51 selfloop transitions, 19 changer transitions 0/82 dead transitions. [2024-06-28 00:38:12,125 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 82 transitions, 641 flow [2024-06-28 00:38:12,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:38:12,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:38:12,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-28 00:38:12,140 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-28 00:38:12,141 INFO L175 Difference]: Start difference. First operand has 75 places, 60 transitions, 417 flow. Second operand 6 states and 150 transitions. [2024-06-28 00:38:12,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 82 transitions, 641 flow [2024-06-28 00:38:12,145 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 82 transitions, 604 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-06-28 00:38:12,146 INFO L231 Difference]: Finished difference. Result has 80 places, 64 transitions, 467 flow [2024-06-28 00:38:12,146 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=386, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=467, PETRI_PLACES=80, PETRI_TRANSITIONS=64} [2024-06-28 00:38:12,146 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 38 predicate places. [2024-06-28 00:38:12,147 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 64 transitions, 467 flow [2024-06-28 00:38:12,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 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) [2024-06-28 00:38:12,147 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:38:12,147 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:38:12,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-28 00:38:12,147 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:38:12,148 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:38:12,148 INFO L85 PathProgramCache]: Analyzing trace with hash -1386793511, now seen corresponding path program 1 times [2024-06-28 00:38:12,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:38:12,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875957897] [2024-06-28 00:38:12,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:38:12,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:38:12,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:38:12,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:38:12,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:38:12,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875957897] [2024-06-28 00:38:12,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875957897] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:38:12,448 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:38:12,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:38:12,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673726058] [2024-06-28 00:38:12,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:38:12,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:38:12,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:38:12,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:38:12,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:38:12,482 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 41 [2024-06-28 00:38:12,482 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 64 transitions, 467 flow. Second operand has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 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) [2024-06-28 00:38:12,482 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:38:12,482 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 41 [2024-06-28 00:38:12,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:38:12,710 INFO L124 PetriNetUnfolderBase]: 456/932 cut-off events. [2024-06-28 00:38:12,724 INFO L125 PetriNetUnfolderBase]: For 3350/3353 co-relation queries the response was YES. [2024-06-28 00:38:12,727 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3219 conditions, 932 events. 456/932 cut-off events. For 3350/3353 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 5822 event pairs, 44 based on Foata normal form. 6/933 useless extension candidates. Maximal degree in co-relation 3183. Up to 480 conditions per place. [2024-06-28 00:38:12,744 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 53 selfloop transitions, 16 changer transitions 0/81 dead transitions. [2024-06-28 00:38:12,744 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 81 transitions, 661 flow [2024-06-28 00:38:12,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 00:38:12,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 00:38:12,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 127 transitions. [2024-06-28 00:38:12,745 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6195121951219512 [2024-06-28 00:38:12,745 INFO L175 Difference]: Start difference. First operand has 80 places, 64 transitions, 467 flow. Second operand 5 states and 127 transitions. [2024-06-28 00:38:12,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 81 transitions, 661 flow [2024-06-28 00:38:12,750 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 81 transitions, 628 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-28 00:38:12,751 INFO L231 Difference]: Finished difference. Result has 82 places, 66 transitions, 498 flow [2024-06-28 00:38:12,752 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=434, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=498, PETRI_PLACES=82, PETRI_TRANSITIONS=66} [2024-06-28 00:38:12,752 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 40 predicate places. [2024-06-28 00:38:12,752 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 66 transitions, 498 flow [2024-06-28 00:38:12,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 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) [2024-06-28 00:38:12,753 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:38:12,753 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:38:12,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-28 00:38:12,768 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)] === [2024-06-28 00:38:12,769 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:38:12,769 INFO L85 PathProgramCache]: Analyzing trace with hash -2073397139, now seen corresponding path program 2 times [2024-06-28 00:38:12,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:38:12,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45264283] [2024-06-28 00:38:12,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:38:12,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:38:12,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:38:13,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:38:13,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:38:13,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45264283] [2024-06-28 00:38:13,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45264283] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:38:13,054 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:38:13,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:38:13,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894832244] [2024-06-28 00:38:13,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:38:13,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:38:13,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:38:13,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:38:13,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:38:13,090 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 41 [2024-06-28 00:38:13,090 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 66 transitions, 498 flow. Second operand has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 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) [2024-06-28 00:38:13,090 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:38:13,091 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 41 [2024-06-28 00:38:13,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:38:13,255 INFO L124 PetriNetUnfolderBase]: 472/964 cut-off events. [2024-06-28 00:38:13,256 INFO L125 PetriNetUnfolderBase]: For 3691/3694 co-relation queries the response was YES. [2024-06-28 00:38:13,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3464 conditions, 964 events. 472/964 cut-off events. For 3691/3694 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 6059 event pairs, 47 based on Foata normal form. 2/961 useless extension candidates. Maximal degree in co-relation 3427. Up to 478 conditions per place. [2024-06-28 00:38:13,265 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 49 selfloop transitions, 26 changer transitions 0/87 dead transitions. [2024-06-28 00:38:13,265 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 87 transitions, 728 flow [2024-06-28 00:38:13,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:38:13,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:38:13,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-28 00:38:13,267 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-28 00:38:13,267 INFO L175 Difference]: Start difference. First operand has 82 places, 66 transitions, 498 flow. Second operand 6 states and 150 transitions. [2024-06-28 00:38:13,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 87 transitions, 728 flow [2024-06-28 00:38:13,274 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 87 transitions, 696 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-28 00:38:13,276 INFO L231 Difference]: Finished difference. Result has 86 places, 70 transitions, 587 flow [2024-06-28 00:38:13,276 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=466, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=587, PETRI_PLACES=86, PETRI_TRANSITIONS=70} [2024-06-28 00:38:13,277 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 44 predicate places. [2024-06-28 00:38:13,277 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 70 transitions, 587 flow [2024-06-28 00:38:13,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 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) [2024-06-28 00:38:13,278 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:38:13,278 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:38:13,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-28 00:38:13,278 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)] === [2024-06-28 00:38:13,279 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:38:13,279 INFO L85 PathProgramCache]: Analyzing trace with hash -1246418027, now seen corresponding path program 3 times [2024-06-28 00:38:13,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:38:13,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602338461] [2024-06-28 00:38:13,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:38:13,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:38:13,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:38:13,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:38:13,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:38:13,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602338461] [2024-06-28 00:38:13,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602338461] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:38:13,486 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:38:13,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:38:13,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590254992] [2024-06-28 00:38:13,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:38:13,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:38:13,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:38:13,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:38:13,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:38:13,510 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 41 [2024-06-28 00:38:13,511 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 70 transitions, 587 flow. Second operand has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 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) [2024-06-28 00:38:13,511 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:38:13,511 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 41 [2024-06-28 00:38:13,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:38:13,687 INFO L124 PetriNetUnfolderBase]: 492/1008 cut-off events. [2024-06-28 00:38:13,688 INFO L125 PetriNetUnfolderBase]: For 5269/5272 co-relation queries the response was YES. [2024-06-28 00:38:13,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3827 conditions, 1008 events. 492/1008 cut-off events. For 5269/5272 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 6383 event pairs, 45 based on Foata normal form. 6/1008 useless extension candidates. Maximal degree in co-relation 3788. Up to 485 conditions per place. [2024-06-28 00:38:13,700 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 65 selfloop transitions, 14 changer transitions 0/91 dead transitions. [2024-06-28 00:38:13,701 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 91 transitions, 829 flow [2024-06-28 00:38:13,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:38:13,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:38:13,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 147 transitions. [2024-06-28 00:38:13,702 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5975609756097561 [2024-06-28 00:38:13,702 INFO L175 Difference]: Start difference. First operand has 86 places, 70 transitions, 587 flow. Second operand 6 states and 147 transitions. [2024-06-28 00:38:13,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 91 transitions, 829 flow [2024-06-28 00:38:13,712 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 91 transitions, 784 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-28 00:38:13,714 INFO L231 Difference]: Finished difference. Result has 89 places, 72 transitions, 605 flow [2024-06-28 00:38:13,714 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=542, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=605, PETRI_PLACES=89, PETRI_TRANSITIONS=72} [2024-06-28 00:38:13,715 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 47 predicate places. [2024-06-28 00:38:13,716 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 72 transitions, 605 flow [2024-06-28 00:38:13,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 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) [2024-06-28 00:38:13,716 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:38:13,716 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:38:13,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-28 00:38:13,717 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)] === [2024-06-28 00:38:13,717 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:38:13,717 INFO L85 PathProgramCache]: Analyzing trace with hash 1645301993, now seen corresponding path program 4 times [2024-06-28 00:38:13,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:38:13,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909164934] [2024-06-28 00:38:13,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:38:13,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:38:13,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:38:13,951 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:38:13,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:38:13,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909164934] [2024-06-28 00:38:13,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909164934] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:38:13,954 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:38:13,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:38:13,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551912809] [2024-06-28 00:38:13,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:38:13,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:38:13,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:38:13,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:38:13,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:38:13,981 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 41 [2024-06-28 00:38:13,981 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 72 transitions, 605 flow. Second operand has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 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) [2024-06-28 00:38:13,981 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:38:13,982 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 41 [2024-06-28 00:38:13,982 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:38:14,198 INFO L124 PetriNetUnfolderBase]: 512/1052 cut-off events. [2024-06-28 00:38:14,198 INFO L125 PetriNetUnfolderBase]: For 6563/6566 co-relation queries the response was YES. [2024-06-28 00:38:14,203 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4121 conditions, 1052 events. 512/1052 cut-off events. For 6563/6566 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 6757 event pairs, 67 based on Foata normal form. 6/1051 useless extension candidates. Maximal degree in co-relation 4081. Up to 444 conditions per place. [2024-06-28 00:38:14,208 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 57 selfloop transitions, 20 changer transitions 0/89 dead transitions. [2024-06-28 00:38:14,209 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 89 transitions, 831 flow [2024-06-28 00:38:14,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:38:14,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:38:14,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 145 transitions. [2024-06-28 00:38:14,210 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5894308943089431 [2024-06-28 00:38:14,210 INFO L175 Difference]: Start difference. First operand has 89 places, 72 transitions, 605 flow. Second operand 6 states and 145 transitions. [2024-06-28 00:38:14,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 89 transitions, 831 flow [2024-06-28 00:38:14,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 89 transitions, 778 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-28 00:38:14,228 INFO L231 Difference]: Finished difference. Result has 91 places, 74 transitions, 631 flow [2024-06-28 00:38:14,228 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=552, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=631, PETRI_PLACES=91, PETRI_TRANSITIONS=74} [2024-06-28 00:38:14,230 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 49 predicate places. [2024-06-28 00:38:14,230 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 74 transitions, 631 flow [2024-06-28 00:38:14,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 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) [2024-06-28 00:38:14,231 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:38:14,231 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:38:14,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-28 00:38:14,231 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)] === [2024-06-28 00:38:14,232 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:38:14,232 INFO L85 PathProgramCache]: Analyzing trace with hash -1321835711, now seen corresponding path program 5 times [2024-06-28 00:38:14,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:38:14,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187727868] [2024-06-28 00:38:14,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:38:14,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:38:14,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:38:14,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:38:14,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:38:14,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187727868] [2024-06-28 00:38:14,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187727868] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:38:14,471 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:38:14,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:38:14,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353457563] [2024-06-28 00:38:14,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:38:14,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:38:14,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:38:14,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:38:14,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:38:14,506 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 41 [2024-06-28 00:38:14,506 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 74 transitions, 631 flow. Second operand has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 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) [2024-06-28 00:38:14,506 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:38:14,506 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 41 [2024-06-28 00:38:14,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:38:14,669 INFO L124 PetriNetUnfolderBase]: 520/1068 cut-off events. [2024-06-28 00:38:14,669 INFO L125 PetriNetUnfolderBase]: For 6700/6703 co-relation queries the response was YES. [2024-06-28 00:38:14,672 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4245 conditions, 1068 events. 520/1068 cut-off events. For 6700/6703 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 6859 event pairs, 117 based on Foata normal form. 2/1064 useless extension candidates. Maximal degree in co-relation 4205. Up to 767 conditions per place. [2024-06-28 00:38:14,680 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 59 selfloop transitions, 16 changer transitions 0/87 dead transitions. [2024-06-28 00:38:14,680 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 87 transitions, 839 flow [2024-06-28 00:38:14,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:38:14,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:38:14,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 142 transitions. [2024-06-28 00:38:14,682 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5772357723577236 [2024-06-28 00:38:14,682 INFO L175 Difference]: Start difference. First operand has 91 places, 74 transitions, 631 flow. Second operand 6 states and 142 transitions. [2024-06-28 00:38:14,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 87 transitions, 839 flow [2024-06-28 00:38:14,690 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 87 transitions, 776 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-28 00:38:14,691 INFO L231 Difference]: Finished difference. Result has 93 places, 76 transitions, 643 flow [2024-06-28 00:38:14,691 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=568, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=643, PETRI_PLACES=93, PETRI_TRANSITIONS=76} [2024-06-28 00:38:14,692 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 51 predicate places. [2024-06-28 00:38:14,692 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 76 transitions, 643 flow [2024-06-28 00:38:14,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 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) [2024-06-28 00:38:14,692 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:38:14,692 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:38:14,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-28 00:38:14,692 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)] === [2024-06-28 00:38:14,693 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:38:14,693 INFO L85 PathProgramCache]: Analyzing trace with hash 253742465, now seen corresponding path program 6 times [2024-06-28 00:38:14,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:38:14,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530969793] [2024-06-28 00:38:14,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:38:14,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:38:14,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:38:14,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:38:14,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:38:14,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530969793] [2024-06-28 00:38:14,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530969793] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:38:14,918 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:38:14,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:38:14,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337886899] [2024-06-28 00:38:14,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:38:14,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:38:14,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:38:14,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:38:14,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:38:14,938 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 41 [2024-06-28 00:38:14,939 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 76 transitions, 643 flow. Second operand has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 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) [2024-06-28 00:38:14,939 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:38:14,939 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 41 [2024-06-28 00:38:14,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:38:15,078 INFO L124 PetriNetUnfolderBase]: 515/1030 cut-off events. [2024-06-28 00:38:15,078 INFO L125 PetriNetUnfolderBase]: For 6804/6807 co-relation queries the response was YES. [2024-06-28 00:38:15,082 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4056 conditions, 1030 events. 515/1030 cut-off events. For 6804/6807 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 6714 event pairs, 178 based on Foata normal form. 2/1014 useless extension candidates. Maximal degree in co-relation 4015. Up to 403 conditions per place. [2024-06-28 00:38:15,085 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 46 selfloop transitions, 31 changer transitions 0/89 dead transitions. [2024-06-28 00:38:15,085 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 89 transitions, 871 flow [2024-06-28 00:38:15,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:38:15,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:38:15,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 143 transitions. [2024-06-28 00:38:15,087 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5813008130081301 [2024-06-28 00:38:15,087 INFO L175 Difference]: Start difference. First operand has 93 places, 76 transitions, 643 flow. Second operand 6 states and 143 transitions. [2024-06-28 00:38:15,087 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 89 transitions, 871 flow [2024-06-28 00:38:15,095 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 89 transitions, 776 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-28 00:38:15,099 INFO L231 Difference]: Finished difference. Result has 94 places, 78 transitions, 657 flow [2024-06-28 00:38:15,099 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=548, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=657, PETRI_PLACES=94, PETRI_TRANSITIONS=78} [2024-06-28 00:38:15,100 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 52 predicate places. [2024-06-28 00:38:15,100 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 78 transitions, 657 flow [2024-06-28 00:38:15,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 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) [2024-06-28 00:38:15,100 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:38:15,100 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] [2024-06-28 00:38:15,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-28 00:38:15,100 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)] === [2024-06-28 00:38:15,101 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:38:15,101 INFO L85 PathProgramCache]: Analyzing trace with hash 209918370, now seen corresponding path program 1 times [2024-06-28 00:38:15,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:38:15,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713856794] [2024-06-28 00:38:15,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:38:15,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:38:15,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:38:15,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:38:15,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:38:15,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713856794] [2024-06-28 00:38:15,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713856794] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:38:15,474 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:38:15,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:38:15,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363417521] [2024-06-28 00:38:15,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:38:15,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:38:15,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:38:15,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:38:15,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:38:15,496 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 41 [2024-06-28 00:38:15,497 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 78 transitions, 657 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 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) [2024-06-28 00:38:15,497 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:38:15,497 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 41 [2024-06-28 00:38:15,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:38:15,696 INFO L124 PetriNetUnfolderBase]: 555/1149 cut-off events. [2024-06-28 00:38:15,696 INFO L125 PetriNetUnfolderBase]: For 9854/9857 co-relation queries the response was YES. [2024-06-28 00:38:15,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4439 conditions, 1149 events. 555/1149 cut-off events. For 9854/9857 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 7573 event pairs, 64 based on Foata normal form. 16/1158 useless extension candidates. Maximal degree in co-relation 4398. Up to 509 conditions per place. [2024-06-28 00:38:15,705 INFO L140 encePairwiseOnDemand]: 35/41 looper letters, 64 selfloop transitions, 13 changer transitions 10/99 dead transitions. [2024-06-28 00:38:15,705 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 99 transitions, 931 flow [2024-06-28 00:38:15,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:38:15,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:38:15,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 151 transitions. [2024-06-28 00:38:15,706 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6138211382113821 [2024-06-28 00:38:15,706 INFO L175 Difference]: Start difference. First operand has 94 places, 78 transitions, 657 flow. Second operand 6 states and 151 transitions. [2024-06-28 00:38:15,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 99 transitions, 931 flow [2024-06-28 00:38:15,716 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 99 transitions, 838 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-06-28 00:38:15,717 INFO L231 Difference]: Finished difference. Result has 97 places, 72 transitions, 557 flow [2024-06-28 00:38:15,717 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=564, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=557, PETRI_PLACES=97, PETRI_TRANSITIONS=72} [2024-06-28 00:38:15,718 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 55 predicate places. [2024-06-28 00:38:15,718 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 72 transitions, 557 flow [2024-06-28 00:38:15,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 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) [2024-06-28 00:38:15,718 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:38:15,718 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] [2024-06-28 00:38:15,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-28 00:38:15,718 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)] === [2024-06-28 00:38:15,719 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:38:15,719 INFO L85 PathProgramCache]: Analyzing trace with hash -2088241182, now seen corresponding path program 2 times [2024-06-28 00:38:15,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:38:15,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940743059] [2024-06-28 00:38:15,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:38:15,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:38:15,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:38:16,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:38:16,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:38:16,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940743059] [2024-06-28 00:38:16,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940743059] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:38:16,053 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:38:16,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:38:16,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991546009] [2024-06-28 00:38:16,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:38:16,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:38:16,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:38:16,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:38:16,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:38:16,072 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 41 [2024-06-28 00:38:16,072 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 72 transitions, 557 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 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) [2024-06-28 00:38:16,072 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:38:16,072 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 41 [2024-06-28 00:38:16,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:38:16,255 INFO L124 PetriNetUnfolderBase]: 433/905 cut-off events. [2024-06-28 00:38:16,255 INFO L125 PetriNetUnfolderBase]: For 9701/9704 co-relation queries the response was YES. [2024-06-28 00:38:16,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3575 conditions, 905 events. 433/905 cut-off events. For 9701/9704 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 5583 event pairs, 80 based on Foata normal form. 16/914 useless extension candidates. Maximal degree in co-relation 3543. Up to 473 conditions per place. [2024-06-28 00:38:16,261 INFO L140 encePairwiseOnDemand]: 35/41 looper letters, 56 selfloop transitions, 21 changer transitions 6/95 dead transitions. [2024-06-28 00:38:16,261 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 95 transitions, 829 flow [2024-06-28 00:38:16,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:38:16,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:38:16,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-28 00:38:16,262 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6062717770034843 [2024-06-28 00:38:16,262 INFO L175 Difference]: Start difference. First operand has 97 places, 72 transitions, 557 flow. Second operand 7 states and 174 transitions. [2024-06-28 00:38:16,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 95 transitions, 829 flow [2024-06-28 00:38:16,271 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 95 transitions, 758 flow, removed 11 selfloop flow, removed 11 redundant places. [2024-06-28 00:38:16,272 INFO L231 Difference]: Finished difference. Result has 93 places, 69 transitions, 529 flow [2024-06-28 00:38:16,272 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=494, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=529, PETRI_PLACES=93, PETRI_TRANSITIONS=69} [2024-06-28 00:38:16,273 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 51 predicate places. [2024-06-28 00:38:16,273 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 69 transitions, 529 flow [2024-06-28 00:38:16,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 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) [2024-06-28 00:38:16,273 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:38:16,273 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] [2024-06-28 00:38:16,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-28 00:38:16,273 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)] === [2024-06-28 00:38:16,274 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:38:16,274 INFO L85 PathProgramCache]: Analyzing trace with hash 337831084, now seen corresponding path program 1 times [2024-06-28 00:38:16,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:38:16,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654855010] [2024-06-28 00:38:16,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:38:16,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:38:16,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:38:16,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:38:16,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:38:16,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654855010] [2024-06-28 00:38:16,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654855010] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:38:16,586 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:38:16,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:38:16,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612678997] [2024-06-28 00:38:16,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:38:16,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:38:16,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:38:16,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:38:16,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:38:16,625 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 41 [2024-06-28 00:38:16,626 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 69 transitions, 529 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 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) [2024-06-28 00:38:16,626 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:38:16,626 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 41 [2024-06-28 00:38:16,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:38:16,774 INFO L124 PetriNetUnfolderBase]: 421/887 cut-off events. [2024-06-28 00:38:16,775 INFO L125 PetriNetUnfolderBase]: For 7286/7289 co-relation queries the response was YES. [2024-06-28 00:38:16,777 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3304 conditions, 887 events. 421/887 cut-off events. For 7286/7289 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 5473 event pairs, 74 based on Foata normal form. 12/892 useless extension candidates. Maximal degree in co-relation 3274. Up to 441 conditions per place. [2024-06-28 00:38:16,780 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 53 selfloop transitions, 18 changer transitions 11/94 dead transitions. [2024-06-28 00:38:16,780 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 94 transitions, 793 flow [2024-06-28 00:38:16,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:38:16,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:38:16,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-28 00:38:16,781 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6062717770034843 [2024-06-28 00:38:16,781 INFO L175 Difference]: Start difference. First operand has 93 places, 69 transitions, 529 flow. Second operand 7 states and 174 transitions. [2024-06-28 00:38:16,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 94 transitions, 793 flow [2024-06-28 00:38:16,790 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 94 transitions, 716 flow, removed 9 selfloop flow, removed 10 redundant places. [2024-06-28 00:38:16,791 INFO L231 Difference]: Finished difference. Result has 91 places, 63 transitions, 464 flow [2024-06-28 00:38:16,791 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=458, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=464, PETRI_PLACES=91, PETRI_TRANSITIONS=63} [2024-06-28 00:38:16,791 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 49 predicate places. [2024-06-28 00:38:16,792 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 63 transitions, 464 flow [2024-06-28 00:38:16,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 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) [2024-06-28 00:38:16,793 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:38:16,793 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] [2024-06-28 00:38:16,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-28 00:38:16,793 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)] === [2024-06-28 00:38:16,794 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:38:16,794 INFO L85 PathProgramCache]: Analyzing trace with hash 488183444, now seen corresponding path program 3 times [2024-06-28 00:38:16,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:38:16,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160198238] [2024-06-28 00:38:16,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:38:16,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:38:16,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:38:17,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:38:17,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:38:17,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160198238] [2024-06-28 00:38:17,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160198238] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:38:17,176 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:38:17,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:38:17,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874591637] [2024-06-28 00:38:17,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:38:17,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:38:17,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:38:17,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:38:17,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:38:17,203 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 41 [2024-06-28 00:38:17,203 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 63 transitions, 464 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 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) [2024-06-28 00:38:17,203 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:38:17,203 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 41 [2024-06-28 00:38:17,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:38:17,355 INFO L124 PetriNetUnfolderBase]: 391/809 cut-off events. [2024-06-28 00:38:17,355 INFO L125 PetriNetUnfolderBase]: For 6985/6985 co-relation queries the response was YES. [2024-06-28 00:38:17,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3036 conditions, 809 events. 391/809 cut-off events. For 6985/6985 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 4814 event pairs, 56 based on Foata normal form. 16/813 useless extension candidates. Maximal degree in co-relation 3007. Up to 418 conditions per place. [2024-06-28 00:38:17,361 INFO L140 encePairwiseOnDemand]: 35/41 looper letters, 50 selfloop transitions, 4 changer transitions 20/86 dead transitions. [2024-06-28 00:38:17,361 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 86 transitions, 716 flow [2024-06-28 00:38:17,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:38:17,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:38:17,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-28 00:38:17,363 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5818815331010453 [2024-06-28 00:38:17,363 INFO L175 Difference]: Start difference. First operand has 91 places, 63 transitions, 464 flow. Second operand 7 states and 167 transitions. [2024-06-28 00:38:17,363 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 86 transitions, 716 flow [2024-06-28 00:38:17,370 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 86 transitions, 641 flow, removed 2 selfloop flow, removed 14 redundant places. [2024-06-28 00:38:17,372 INFO L231 Difference]: Finished difference. Result has 84 places, 59 transitions, 380 flow [2024-06-28 00:38:17,372 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=389, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=380, PETRI_PLACES=84, PETRI_TRANSITIONS=59} [2024-06-28 00:38:17,372 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 42 predicate places. [2024-06-28 00:38:17,372 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 59 transitions, 380 flow [2024-06-28 00:38:17,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 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) [2024-06-28 00:38:17,373 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:38:17,373 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] [2024-06-28 00:38:17,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-28 00:38:17,373 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)] === [2024-06-28 00:38:17,374 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:38:17,374 INFO L85 PathProgramCache]: Analyzing trace with hash 1753372308, now seen corresponding path program 4 times [2024-06-28 00:38:17,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:38:17,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665145515] [2024-06-28 00:38:17,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:38:17,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:38:17,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:38:17,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:38:17,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:38:17,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665145515] [2024-06-28 00:38:17,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665145515] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:38:17,783 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:38:17,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:38:17,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907991187] [2024-06-28 00:38:17,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:38:17,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:38:17,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:38:17,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:38:17,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:38:17,824 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 41 [2024-06-28 00:38:17,825 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 59 transitions, 380 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 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) [2024-06-28 00:38:17,825 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:38:17,825 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 41 [2024-06-28 00:38:17,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:38:17,998 INFO L124 PetriNetUnfolderBase]: 287/575 cut-off events. [2024-06-28 00:38:17,999 INFO L125 PetriNetUnfolderBase]: For 5073/5073 co-relation queries the response was YES. [2024-06-28 00:38:18,001 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2257 conditions, 575 events. 287/575 cut-off events. For 5073/5073 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 2983 event pairs, 50 based on Foata normal form. 4/573 useless extension candidates. Maximal degree in co-relation 2231. Up to 379 conditions per place. [2024-06-28 00:38:18,004 INFO L140 encePairwiseOnDemand]: 35/41 looper letters, 50 selfloop transitions, 10 changer transitions 0/72 dead transitions. [2024-06-28 00:38:18,004 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 72 transitions, 560 flow [2024-06-28 00:38:18,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:38:18,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:38:18,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 140 transitions. [2024-06-28 00:38:18,006 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5691056910569106 [2024-06-28 00:38:18,006 INFO L175 Difference]: Start difference. First operand has 84 places, 59 transitions, 380 flow. Second operand 6 states and 140 transitions. [2024-06-28 00:38:18,006 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 72 transitions, 560 flow [2024-06-28 00:38:18,012 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 72 transitions, 530 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-28 00:38:18,013 INFO L231 Difference]: Finished difference. Result has 78 places, 60 transitions, 402 flow [2024-06-28 00:38:18,014 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=356, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=402, PETRI_PLACES=78, PETRI_TRANSITIONS=60} [2024-06-28 00:38:18,014 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 36 predicate places. [2024-06-28 00:38:18,014 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 60 transitions, 402 flow [2024-06-28 00:38:18,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 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) [2024-06-28 00:38:18,015 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:38:18,015 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] [2024-06-28 00:38:18,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-28 00:38:18,015 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)] === [2024-06-28 00:38:18,016 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:38:18,016 INFO L85 PathProgramCache]: Analyzing trace with hash 2100030932, now seen corresponding path program 2 times [2024-06-28 00:38:18,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:38:18,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727332194] [2024-06-28 00:38:18,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:38:18,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:38:18,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:38:18,475 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:38:18,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:38:18,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727332194] [2024-06-28 00:38:18,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727332194] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:38:18,476 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:38:18,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:38:18,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138019167] [2024-06-28 00:38:18,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:38:18,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:38:18,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:38:18,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:38:18,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:38:18,505 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-28 00:38:18,506 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 60 transitions, 402 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 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) [2024-06-28 00:38:18,506 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:38:18,506 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-28 00:38:18,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:38:18,668 INFO L124 PetriNetUnfolderBase]: 315/655 cut-off events. [2024-06-28 00:38:18,668 INFO L125 PetriNetUnfolderBase]: For 4688/4688 co-relation queries the response was YES. [2024-06-28 00:38:18,671 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2381 conditions, 655 events. 315/655 cut-off events. For 4688/4688 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 3575 event pairs, 66 based on Foata normal form. 12/657 useless extension candidates. Maximal degree in co-relation 2358. Up to 393 conditions per place. [2024-06-28 00:38:18,673 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 50 selfloop transitions, 9 changer transitions 7/77 dead transitions. [2024-06-28 00:38:18,674 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 77 transitions, 590 flow [2024-06-28 00:38:18,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:38:18,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:38:18,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 164 transitions. [2024-06-28 00:38:18,675 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-28 00:38:18,675 INFO L175 Difference]: Start difference. First operand has 78 places, 60 transitions, 402 flow. Second operand 8 states and 164 transitions. [2024-06-28 00:38:18,675 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 77 transitions, 590 flow [2024-06-28 00:38:18,681 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 77 transitions, 560 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-28 00:38:18,682 INFO L231 Difference]: Finished difference. Result has 82 places, 59 transitions, 386 flow [2024-06-28 00:38:18,682 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=372, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=386, PETRI_PLACES=82, PETRI_TRANSITIONS=59} [2024-06-28 00:38:18,683 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 40 predicate places. [2024-06-28 00:38:18,683 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 59 transitions, 386 flow [2024-06-28 00:38:18,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 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) [2024-06-28 00:38:18,683 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:38:18,684 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] [2024-06-28 00:38:18,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-28 00:38:18,684 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)] === [2024-06-28 00:38:18,684 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:38:18,684 INFO L85 PathProgramCache]: Analyzing trace with hash -82271670, now seen corresponding path program 3 times [2024-06-28 00:38:18,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:38:18,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199094074] [2024-06-28 00:38:18,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:38:18,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:38:18,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:38:19,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:38:19,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:38:19,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199094074] [2024-06-28 00:38:19,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199094074] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:38:19,058 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:38:19,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:38:19,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129712393] [2024-06-28 00:38:19,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:38:19,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:38:19,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:38:19,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:38:19,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:38:19,075 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 41 [2024-06-28 00:38:19,076 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 59 transitions, 386 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 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) [2024-06-28 00:38:19,076 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:38:19,076 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 41 [2024-06-28 00:38:19,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:38:19,220 INFO L124 PetriNetUnfolderBase]: 303/649 cut-off events. [2024-06-28 00:38:19,220 INFO L125 PetriNetUnfolderBase]: For 4751/4751 co-relation queries the response was YES. [2024-06-28 00:38:19,222 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2288 conditions, 649 events. 303/649 cut-off events. For 4751/4751 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 3710 event pairs, 72 based on Foata normal form. 12/653 useless extension candidates. Maximal degree in co-relation 2264. Up to 355 conditions per place. [2024-06-28 00:38:19,224 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 46 selfloop transitions, 6 changer transitions 14/78 dead transitions. [2024-06-28 00:38:19,224 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 78 transitions, 588 flow [2024-06-28 00:38:19,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:38:19,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:38:19,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-06-28 00:38:19,226 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5679442508710801 [2024-06-28 00:38:19,226 INFO L175 Difference]: Start difference. First operand has 82 places, 59 transitions, 386 flow. Second operand 7 states and 163 transitions. [2024-06-28 00:38:19,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 78 transitions, 588 flow [2024-06-28 00:38:19,231 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 78 transitions, 568 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-28 00:38:19,232 INFO L231 Difference]: Finished difference. Result has 81 places, 57 transitions, 359 flow [2024-06-28 00:38:19,232 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=366, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=359, PETRI_PLACES=81, PETRI_TRANSITIONS=57} [2024-06-28 00:38:19,233 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 39 predicate places. [2024-06-28 00:38:19,233 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 57 transitions, 359 flow [2024-06-28 00:38:19,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 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) [2024-06-28 00:38:19,233 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:38:19,234 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] [2024-06-28 00:38:19,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-28 00:38:19,234 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)] === [2024-06-28 00:38:19,234 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:38:19,234 INFO L85 PathProgramCache]: Analyzing trace with hash -82975064, now seen corresponding path program 5 times [2024-06-28 00:38:19,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:38:19,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988418386] [2024-06-28 00:38:19,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:38:19,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:38:19,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:38:19,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:38:19,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:38:19,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988418386] [2024-06-28 00:38:19,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988418386] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:38:19,763 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:38:19,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:38:19,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072903895] [2024-06-28 00:38:19,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:38:19,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:38:19,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:38:19,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:38:19,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:38:19,811 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 41 [2024-06-28 00:38:19,812 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 57 transitions, 359 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 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) [2024-06-28 00:38:19,812 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:38:19,812 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 41 [2024-06-28 00:38:19,812 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:38:19,946 INFO L124 PetriNetUnfolderBase]: 289/617 cut-off events. [2024-06-28 00:38:19,946 INFO L125 PetriNetUnfolderBase]: For 5275/5275 co-relation queries the response was YES. [2024-06-28 00:38:19,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2193 conditions, 617 events. 289/617 cut-off events. For 5275/5275 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 3533 event pairs, 78 based on Foata normal form. 16/629 useless extension candidates. Maximal degree in co-relation 2169. Up to 390 conditions per place. [2024-06-28 00:38:19,950 INFO L140 encePairwiseOnDemand]: 35/41 looper letters, 42 selfloop transitions, 7 changer transitions 12/73 dead transitions. [2024-06-28 00:38:19,950 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 73 transitions, 543 flow [2024-06-28 00:38:19,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:38:19,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:38:19,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-06-28 00:38:19,951 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5679442508710801 [2024-06-28 00:38:19,951 INFO L175 Difference]: Start difference. First operand has 81 places, 57 transitions, 359 flow. Second operand 7 states and 163 transitions. [2024-06-28 00:38:19,951 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 73 transitions, 543 flow [2024-06-28 00:38:19,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 73 transitions, 518 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-28 00:38:19,957 INFO L231 Difference]: Finished difference. Result has 81 places, 54 transitions, 340 flow [2024-06-28 00:38:19,958 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=334, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=340, PETRI_PLACES=81, PETRI_TRANSITIONS=54} [2024-06-28 00:38:19,958 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 39 predicate places. [2024-06-28 00:38:19,958 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 54 transitions, 340 flow [2024-06-28 00:38:19,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 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) [2024-06-28 00:38:19,959 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:38:19,959 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] [2024-06-28 00:38:19,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-28 00:38:19,959 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)] === [2024-06-28 00:38:19,960 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:38:19,961 INFO L85 PathProgramCache]: Analyzing trace with hash 1290461420, now seen corresponding path program 6 times [2024-06-28 00:38:19,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:38:19,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119560272] [2024-06-28 00:38:19,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:38:19,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:38:19,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:38:20,342 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:38:20,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:38:20,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119560272] [2024-06-28 00:38:20,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119560272] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:38:20,343 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:38:20,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:38:20,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673555458] [2024-06-28 00:38:20,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:38:20,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:38:20,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:38:20,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:38:20,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:38:20,362 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 41 [2024-06-28 00:38:20,363 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 54 transitions, 340 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 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) [2024-06-28 00:38:20,363 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:38:20,363 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 41 [2024-06-28 00:38:20,363 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:38:20,467 INFO L124 PetriNetUnfolderBase]: 257/542 cut-off events. [2024-06-28 00:38:20,468 INFO L125 PetriNetUnfolderBase]: For 5077/5077 co-relation queries the response was YES. [2024-06-28 00:38:20,470 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1860 conditions, 542 events. 257/542 cut-off events. For 5077/5077 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 2978 event pairs, 62 based on Foata normal form. 16/552 useless extension candidates. Maximal degree in co-relation 1836. Up to 245 conditions per place. [2024-06-28 00:38:20,471 INFO L140 encePairwiseOnDemand]: 35/41 looper letters, 33 selfloop transitions, 10 changer transitions 15/70 dead transitions. [2024-06-28 00:38:20,471 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 70 transitions, 508 flow [2024-06-28 00:38:20,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:38:20,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:38:20,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 164 transitions. [2024-06-28 00:38:20,472 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-28 00:38:20,472 INFO L175 Difference]: Start difference. First operand has 81 places, 54 transitions, 340 flow. Second operand 7 states and 164 transitions. [2024-06-28 00:38:20,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 70 transitions, 508 flow [2024-06-28 00:38:20,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 70 transitions, 478 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-28 00:38:20,476 INFO L231 Difference]: Finished difference. Result has 79 places, 49 transitions, 295 flow [2024-06-28 00:38:20,476 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=314, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=295, PETRI_PLACES=79, PETRI_TRANSITIONS=49} [2024-06-28 00:38:20,477 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 37 predicate places. [2024-06-28 00:38:20,477 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 49 transitions, 295 flow [2024-06-28 00:38:20,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 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) [2024-06-28 00:38:20,477 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:38:20,477 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] [2024-06-28 00:38:20,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-28 00:38:20,478 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)] === [2024-06-28 00:38:20,478 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:38:20,478 INFO L85 PathProgramCache]: Analyzing trace with hash 207578156, now seen corresponding path program 4 times [2024-06-28 00:38:20,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:38:20,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983151733] [2024-06-28 00:38:20,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:38:20,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:38:20,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:38:20,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:38:20,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:38:20,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983151733] [2024-06-28 00:38:20,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983151733] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:38:20,803 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:38:20,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:38:20,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470282469] [2024-06-28 00:38:20,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:38:20,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:38:20,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:38:20,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:38:20,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:38:20,847 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 41 [2024-06-28 00:38:20,847 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 49 transitions, 295 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 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) [2024-06-28 00:38:20,847 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:38:20,847 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 41 [2024-06-28 00:38:20,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:38:20,967 INFO L124 PetriNetUnfolderBase]: 243/547 cut-off events. [2024-06-28 00:38:20,968 INFO L125 PetriNetUnfolderBase]: For 3487/3487 co-relation queries the response was YES. [2024-06-28 00:38:20,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1724 conditions, 547 events. 243/547 cut-off events. For 3487/3487 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 3060 event pairs, 68 based on Foata normal form. 12/555 useless extension candidates. Maximal degree in co-relation 1701. Up to 336 conditions per place. [2024-06-28 00:38:20,970 INFO L140 encePairwiseOnDemand]: 35/41 looper letters, 35 selfloop transitions, 5 changer transitions 13/65 dead transitions. [2024-06-28 00:38:20,971 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 65 transitions, 447 flow [2024-06-28 00:38:20,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:38:20,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:38:20,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 160 transitions. [2024-06-28 00:38:20,972 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5574912891986062 [2024-06-28 00:38:20,972 INFO L175 Difference]: Start difference. First operand has 79 places, 49 transitions, 295 flow. Second operand 7 states and 160 transitions. [2024-06-28 00:38:20,972 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 65 transitions, 447 flow [2024-06-28 00:38:20,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 65 transitions, 417 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-28 00:38:20,976 INFO L231 Difference]: Finished difference. Result has 77 places, 47 transitions, 269 flow [2024-06-28 00:38:20,976 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=267, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=269, PETRI_PLACES=77, PETRI_TRANSITIONS=47} [2024-06-28 00:38:20,976 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 35 predicate places. [2024-06-28 00:38:20,976 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 47 transitions, 269 flow [2024-06-28 00:38:20,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 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) [2024-06-28 00:38:20,977 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:38:20,977 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] [2024-06-28 00:38:20,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-28 00:38:20,977 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)] === [2024-06-28 00:38:20,977 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:38:20,977 INFO L85 PathProgramCache]: Analyzing trace with hash 1562541406, now seen corresponding path program 5 times [2024-06-28 00:38:20,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:38:20,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816982926] [2024-06-28 00:38:20,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:38:20,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:38:20,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:38:21,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:38:21,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:38:21,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816982926] [2024-06-28 00:38:21,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816982926] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:38:21,343 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:38:21,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:38:21,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677690658] [2024-06-28 00:38:21,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:38:21,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:38:21,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:38:21,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:38:21,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:38:21,373 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-28 00:38:21,373 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 47 transitions, 269 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) [2024-06-28 00:38:21,373 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:38:21,374 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-28 00:38:21,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:38:21,506 INFO L124 PetriNetUnfolderBase]: 296/649 cut-off events. [2024-06-28 00:38:21,506 INFO L125 PetriNetUnfolderBase]: For 3505/3505 co-relation queries the response was YES. [2024-06-28 00:38:21,508 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1941 conditions, 649 events. 296/649 cut-off events. For 3505/3505 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 3747 event pairs, 98 based on Foata normal form. 16/657 useless extension candidates. Maximal degree in co-relation 1919. Up to 349 conditions per place. [2024-06-28 00:38:21,510 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 39 selfloop transitions, 9 changer transitions 13/72 dead transitions. [2024-06-28 00:38:21,510 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 72 transitions, 476 flow [2024-06-28 00:38:21,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:38:21,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:38:21,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 162 transitions. [2024-06-28 00:38:21,511 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5644599303135889 [2024-06-28 00:38:21,511 INFO L175 Difference]: Start difference. First operand has 77 places, 47 transitions, 269 flow. Second operand 7 states and 162 transitions. [2024-06-28 00:38:21,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 72 transitions, 476 flow [2024-06-28 00:38:21,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 72 transitions, 462 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-28 00:38:21,516 INFO L231 Difference]: Finished difference. Result has 77 places, 49 transitions, 292 flow [2024-06-28 00:38:21,516 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=255, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=292, PETRI_PLACES=77, PETRI_TRANSITIONS=49} [2024-06-28 00:38:21,518 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 35 predicate places. [2024-06-28 00:38:21,518 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 49 transitions, 292 flow [2024-06-28 00:38:21,518 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) [2024-06-28 00:38:21,518 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:38:21,518 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] [2024-06-28 00:38:21,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-28 00:38:21,518 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:38:21,518 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:38:21,519 INFO L85 PathProgramCache]: Analyzing trace with hash -773620248, now seen corresponding path program 6 times [2024-06-28 00:38:21,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:38:21,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640028740] [2024-06-28 00:38:21,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:38:21,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:38:21,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:38:21,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:38:21,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:38:21,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640028740] [2024-06-28 00:38:21,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640028740] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:38:21,891 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:38:21,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:38:21,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173180234] [2024-06-28 00:38:21,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:38:21,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:38:21,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:38:21,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:38:21,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:38:21,942 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 41 [2024-06-28 00:38:21,943 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 49 transitions, 292 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 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) [2024-06-28 00:38:21,943 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:38:21,943 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 41 [2024-06-28 00:38:21,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:38:22,053 INFO L124 PetriNetUnfolderBase]: 240/547 cut-off events. [2024-06-28 00:38:22,053 INFO L125 PetriNetUnfolderBase]: For 3509/3509 co-relation queries the response was YES. [2024-06-28 00:38:22,055 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1730 conditions, 547 events. 240/547 cut-off events. For 3509/3509 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 3126 event pairs, 62 based on Foata normal form. 12/557 useless extension candidates. Maximal degree in co-relation 1707. Up to 147 conditions per place. [2024-06-28 00:38:22,057 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 34 selfloop transitions, 11 changer transitions 10/68 dead transitions. [2024-06-28 00:38:22,057 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 68 transitions, 480 flow [2024-06-28 00:38:22,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:38:22,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:38:22,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 164 transitions. [2024-06-28 00:38:22,059 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-28 00:38:22,059 INFO L175 Difference]: Start difference. First operand has 77 places, 49 transitions, 292 flow. Second operand 7 states and 164 transitions. [2024-06-28 00:38:22,059 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 68 transitions, 480 flow [2024-06-28 00:38:22,063 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 68 transitions, 454 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-28 00:38:22,065 INFO L231 Difference]: Finished difference. Result has 78 places, 47 transitions, 278 flow [2024-06-28 00:38:22,066 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=268, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=278, PETRI_PLACES=78, PETRI_TRANSITIONS=47} [2024-06-28 00:38:22,066 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 36 predicate places. [2024-06-28 00:38:22,066 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 47 transitions, 278 flow [2024-06-28 00:38:22,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 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) [2024-06-28 00:38:22,067 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:38:22,067 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] [2024-06-28 00:38:22,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-28 00:38:22,067 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:38:22,067 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:38:22,068 INFO L85 PathProgramCache]: Analyzing trace with hash 1405296104, now seen corresponding path program 7 times [2024-06-28 00:38:22,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:38:22,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660745785] [2024-06-28 00:38:22,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:38:22,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:38:22,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:38:22,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:38:22,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:38:22,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660745785] [2024-06-28 00:38:22,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660745785] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:38:22,354 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:38:22,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:38:22,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920344600] [2024-06-28 00:38:22,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:38:22,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:38:22,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:38:22,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:38:22,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:38:22,394 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 41 [2024-06-28 00:38:22,395 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 47 transitions, 278 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 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) [2024-06-28 00:38:22,395 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:38:22,395 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 41 [2024-06-28 00:38:22,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:38:22,500 INFO L124 PetriNetUnfolderBase]: 168/408 cut-off events. [2024-06-28 00:38:22,500 INFO L125 PetriNetUnfolderBase]: For 2253/2253 co-relation queries the response was YES. [2024-06-28 00:38:22,501 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1194 conditions, 408 events. 168/408 cut-off events. For 2253/2253 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 2125 event pairs, 46 based on Foata normal form. 12/418 useless extension candidates. Maximal degree in co-relation 1172. Up to 219 conditions per place. [2024-06-28 00:38:22,501 INFO L140 encePairwiseOnDemand]: 35/41 looper letters, 31 selfloop transitions, 4 changer transitions 14/62 dead transitions. [2024-06-28 00:38:22,502 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 62 transitions, 414 flow [2024-06-28 00:38:22,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:38:22,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:38:22,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 158 transitions. [2024-06-28 00:38:22,502 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5505226480836237 [2024-06-28 00:38:22,502 INFO L175 Difference]: Start difference. First operand has 78 places, 47 transitions, 278 flow. Second operand 7 states and 158 transitions. [2024-06-28 00:38:22,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 62 transitions, 414 flow [2024-06-28 00:38:22,505 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 62 transitions, 389 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-28 00:38:22,505 INFO L231 Difference]: Finished difference. Result has 77 places, 43 transitions, 233 flow [2024-06-28 00:38:22,505 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=253, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=233, PETRI_PLACES=77, PETRI_TRANSITIONS=43} [2024-06-28 00:38:22,506 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 35 predicate places. [2024-06-28 00:38:22,506 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 43 transitions, 233 flow [2024-06-28 00:38:22,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 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) [2024-06-28 00:38:22,506 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:38:22,506 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] [2024-06-28 00:38:22,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-28 00:38:22,506 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:38:22,506 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:38:22,506 INFO L85 PathProgramCache]: Analyzing trace with hash -322248125, now seen corresponding path program 1 times [2024-06-28 00:38:22,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:38:22,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168381509] [2024-06-28 00:38:22,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:38:22,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:38:22,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:38:23,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:38:23,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:38:23,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168381509] [2024-06-28 00:38:23,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168381509] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:38:23,048 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:38:23,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:38:23,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796362568] [2024-06-28 00:38:23,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:38:23,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:38:23,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:38:23,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:38:23,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:38:23,088 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-28 00:38:23,088 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 43 transitions, 233 flow. Second operand has 9 states, 9 states have (on average 17.77777777777778) internal successors, (160), 9 states have internal predecessors, (160), 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) [2024-06-28 00:38:23,088 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:38:23,089 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-28 00:38:23,089 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:38:23,202 INFO L124 PetriNetUnfolderBase]: 150/343 cut-off events. [2024-06-28 00:38:23,203 INFO L125 PetriNetUnfolderBase]: For 1600/1600 co-relation queries the response was YES. [2024-06-28 00:38:23,203 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1003 conditions, 343 events. 150/343 cut-off events. For 1600/1600 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1638 event pairs, 32 based on Foata normal form. 8/341 useless extension candidates. Maximal degree in co-relation 982. Up to 176 conditions per place. [2024-06-28 00:38:23,204 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 36 selfloop transitions, 7 changer transitions 11/65 dead transitions. [2024-06-28 00:38:23,204 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 65 transitions, 416 flow [2024-06-28 00:38:23,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:38:23,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:38:23,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 175 transitions. [2024-06-28 00:38:23,205 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5335365853658537 [2024-06-28 00:38:23,206 INFO L175 Difference]: Start difference. First operand has 77 places, 43 transitions, 233 flow. Second operand 8 states and 175 transitions. [2024-06-28 00:38:23,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 65 transitions, 416 flow [2024-06-28 00:38:23,207 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 65 transitions, 398 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-28 00:38:23,208 INFO L231 Difference]: Finished difference. Result has 76 places, 43 transitions, 243 flow [2024-06-28 00:38:23,208 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=215, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=243, PETRI_PLACES=76, PETRI_TRANSITIONS=43} [2024-06-28 00:38:23,209 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 34 predicate places. [2024-06-28 00:38:23,209 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 43 transitions, 243 flow [2024-06-28 00:38:23,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.77777777777778) internal successors, (160), 9 states have internal predecessors, (160), 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) [2024-06-28 00:38:23,209 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:38:23,209 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] [2024-06-28 00:38:23,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-28 00:38:23,210 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:38:23,210 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:38:23,210 INFO L85 PathProgramCache]: Analyzing trace with hash -1510313975, now seen corresponding path program 2 times [2024-06-28 00:38:23,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:38:23,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074047901] [2024-06-28 00:38:23,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:38:23,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:38:23,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:38:23,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:38:23,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:38:23,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074047901] [2024-06-28 00:38:23,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074047901] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:38:23,719 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:38:23,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:38:23,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311404491] [2024-06-28 00:38:23,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:38:23,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:38:23,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:38:23,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:38:23,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:38:23,757 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-28 00:38:23,757 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 43 transitions, 243 flow. Second operand has 9 states, 9 states have (on average 17.77777777777778) internal successors, (160), 9 states have internal predecessors, (160), 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) [2024-06-28 00:38:23,758 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:38:23,758 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-28 00:38:23,758 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:38:23,857 INFO L124 PetriNetUnfolderBase]: 144/353 cut-off events. [2024-06-28 00:38:23,857 INFO L125 PetriNetUnfolderBase]: For 1286/1286 co-relation queries the response was YES. [2024-06-28 00:38:23,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1015 conditions, 353 events. 144/353 cut-off events. For 1286/1286 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1769 event pairs, 40 based on Foata normal form. 8/355 useless extension candidates. Maximal degree in co-relation 993. Up to 89 conditions per place. [2024-06-28 00:38:23,859 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 33 selfloop transitions, 6 changer transitions 9/60 dead transitions. [2024-06-28 00:38:23,859 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 60 transitions, 393 flow [2024-06-28 00:38:23,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:38:23,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:38:23,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 171 transitions. [2024-06-28 00:38:23,861 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5213414634146342 [2024-06-28 00:38:23,861 INFO L175 Difference]: Start difference. First operand has 76 places, 43 transitions, 243 flow. Second operand 8 states and 171 transitions. [2024-06-28 00:38:23,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 60 transitions, 393 flow [2024-06-28 00:38:23,864 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 60 transitions, 371 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-28 00:38:23,864 INFO L231 Difference]: Finished difference. Result has 76 places, 38 transitions, 196 flow [2024-06-28 00:38:23,865 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=223, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=196, PETRI_PLACES=76, PETRI_TRANSITIONS=38} [2024-06-28 00:38:23,865 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 34 predicate places. [2024-06-28 00:38:23,865 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 38 transitions, 196 flow [2024-06-28 00:38:23,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.77777777777778) internal successors, (160), 9 states have internal predecessors, (160), 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) [2024-06-28 00:38:23,865 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:38:23,865 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] [2024-06-28 00:38:23,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-28 00:38:23,866 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:38:23,866 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:38:23,866 INFO L85 PathProgramCache]: Analyzing trace with hash -1212556771, now seen corresponding path program 3 times [2024-06-28 00:38:23,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:38:23,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150673193] [2024-06-28 00:38:23,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:38:23,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:38:23,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:38:24,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:38:24,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:38:24,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150673193] [2024-06-28 00:38:24,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150673193] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:38:24,371 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:38:24,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:38:24,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549608897] [2024-06-28 00:38:24,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:38:24,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:38:24,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:38:24,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:38:24,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:38:24,412 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-28 00:38:24,412 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 38 transitions, 196 flow. Second operand has 9 states, 9 states have (on average 17.77777777777778) internal successors, (160), 9 states have internal predecessors, (160), 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) [2024-06-28 00:38:24,412 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:38:24,412 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-28 00:38:24,413 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:38:24,536 INFO L124 PetriNetUnfolderBase]: 93/240 cut-off events. [2024-06-28 00:38:24,536 INFO L125 PetriNetUnfolderBase]: For 844/844 co-relation queries the response was YES. [2024-06-28 00:38:24,537 INFO L83 FinitePrefix]: Finished finitePrefix Result has 680 conditions, 240 events. 93/240 cut-off events. For 844/844 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1058 event pairs, 36 based on Foata normal form. 8/242 useless extension candidates. Maximal degree in co-relation 659. Up to 89 conditions per place. [2024-06-28 00:38:24,537 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 17 selfloop transitions, 3 changer transitions 21/52 dead transitions. [2024-06-28 00:38:24,537 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 52 transitions, 306 flow [2024-06-28 00:38:24,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:38:24,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:38:24,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 168 transitions. [2024-06-28 00:38:24,538 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5121951219512195 [2024-06-28 00:38:24,539 INFO L175 Difference]: Start difference. First operand has 76 places, 38 transitions, 196 flow. Second operand 8 states and 168 transitions. [2024-06-28 00:38:24,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 52 transitions, 306 flow [2024-06-28 00:38:24,540 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 52 transitions, 272 flow, removed 5 selfloop flow, removed 11 redundant places. [2024-06-28 00:38:24,540 INFO L231 Difference]: Finished difference. Result has 70 places, 30 transitions, 118 flow [2024-06-28 00:38:24,541 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=118, PETRI_PLACES=70, PETRI_TRANSITIONS=30} [2024-06-28 00:38:24,541 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 28 predicate places. [2024-06-28 00:38:24,541 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 30 transitions, 118 flow [2024-06-28 00:38:24,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.77777777777778) internal successors, (160), 9 states have internal predecessors, (160), 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) [2024-06-28 00:38:24,541 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:38:24,541 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] [2024-06-28 00:38:24,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-28 00:38:24,541 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:38:24,542 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:38:24,542 INFO L85 PathProgramCache]: Analyzing trace with hash -393188835, now seen corresponding path program 4 times [2024-06-28 00:38:24,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:38:24,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286777769] [2024-06-28 00:38:24,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:38:24,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:38:24,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:38:25,036 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:38:25,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:38:25,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286777769] [2024-06-28 00:38:25,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286777769] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:38:25,036 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:38:25,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:38:25,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567867771] [2024-06-28 00:38:25,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:38:25,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:38:25,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:38:25,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:38:25,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:38:25,065 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 41 [2024-06-28 00:38:25,066 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 30 transitions, 118 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 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) [2024-06-28 00:38:25,066 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:38:25,066 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 41 [2024-06-28 00:38:25,066 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:38:25,118 INFO L124 PetriNetUnfolderBase]: 36/109 cut-off events. [2024-06-28 00:38:25,119 INFO L125 PetriNetUnfolderBase]: For 298/298 co-relation queries the response was YES. [2024-06-28 00:38:25,119 INFO L83 FinitePrefix]: Finished finitePrefix Result has 253 conditions, 109 events. 36/109 cut-off events. For 298/298 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 309 event pairs, 0 based on Foata normal form. 8/117 useless extension candidates. Maximal degree in co-relation 236. Up to 40 conditions per place. [2024-06-28 00:38:25,119 INFO L140 encePairwiseOnDemand]: 35/41 looper letters, 0 selfloop transitions, 0 changer transitions 36/36 dead transitions. [2024-06-28 00:38:25,119 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 36 transitions, 162 flow [2024-06-28 00:38:25,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:38:25,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:38:25,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 144 transitions. [2024-06-28 00:38:25,120 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5017421602787456 [2024-06-28 00:38:25,120 INFO L175 Difference]: Start difference. First operand has 70 places, 30 transitions, 118 flow. Second operand 7 states and 144 transitions. [2024-06-28 00:38:25,121 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 36 transitions, 162 flow [2024-06-28 00:38:25,121 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 36 transitions, 136 flow, removed 1 selfloop flow, removed 12 redundant places. [2024-06-28 00:38:25,121 INFO L231 Difference]: Finished difference. Result has 52 places, 0 transitions, 0 flow [2024-06-28 00:38:25,122 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=0, PETRI_PLACES=52, PETRI_TRANSITIONS=0} [2024-06-28 00:38:25,122 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 10 predicate places. [2024-06-28 00:38:25,122 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 0 transitions, 0 flow [2024-06-28 00:38:25,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 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) [2024-06-28 00:38:25,125 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (5 of 6 remaining) [2024-06-28 00:38:25,125 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (4 of 6 remaining) [2024-06-28 00:38:25,125 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 6 remaining) [2024-06-28 00:38:25,125 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 6 remaining) [2024-06-28 00:38:25,126 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 6 remaining) [2024-06-28 00:38:25,126 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 6 remaining) [2024-06-28 00:38:25,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-28 00:38:25,126 INFO L445 BasicCegarLoop]: Path program histogram: [7, 6, 6, 4, 3, 2, 2, 1, 1, 1, 1, 1] [2024-06-28 00:38:25,129 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-06-28 00:38:25,129 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2024-06-28 00:38:25,132 INFO L507 ceAbstractionStarter]: Automizer considered 3 witness invariants [2024-06-28 00:38:25,133 INFO L508 ceAbstractionStarter]: WitnessConsidered=3 [2024-06-28 00:38:25,133 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.06 12:38:25 BasicIcfg [2024-06-28 00:38:25,134 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-06-28 00:38:25,134 INFO L158 Benchmark]: Toolchain (without parser) took 22007.85ms. Allocated memory was 167.8MB in the beginning and 658.5MB in the end (delta: 490.7MB). Free memory was 139.8MB in the beginning and 594.1MB in the end (delta: -454.3MB). Peak memory consumption was 36.4MB. Max. memory is 16.1GB. [2024-06-28 00:38:25,134 INFO L158 Benchmark]: Witness Parser took 0.16ms. Allocated memory is still 121.6MB. Free memory is still 72.3MB. There was no memory consumed. Max. memory is 16.1GB. [2024-06-28 00:38:25,134 INFO L158 Benchmark]: CDTParser took 0.76ms. Allocated memory is still 121.6MB. Free memory was 93.1MB in the beginning and 93.0MB in the end (delta: 111.0kB). There was no memory consumed. Max. memory is 16.1GB. [2024-06-28 00:38:25,135 INFO L158 Benchmark]: CACSL2BoogieTranslator took 630.59ms. Allocated memory is still 167.8MB. Free memory was 138.8MB in the beginning and 109.4MB in the end (delta: 29.4MB). Peak memory consumption was 29.4MB. Max. memory is 16.1GB. [2024-06-28 00:38:25,135 INFO L158 Benchmark]: Boogie Procedure Inliner took 69.71ms. Allocated memory is still 167.8MB. Free memory was 109.4MB in the beginning and 105.2MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2024-06-28 00:38:25,135 INFO L158 Benchmark]: Boogie Preprocessor took 44.82ms. Allocated memory is still 167.8MB. Free memory was 105.2MB in the beginning and 102.1MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-06-28 00:38:25,135 INFO L158 Benchmark]: RCFGBuilder took 752.42ms. Allocated memory is still 167.8MB. Free memory was 102.1MB in the beginning and 136.0MB in the end (delta: -33.9MB). Peak memory consumption was 61.4MB. Max. memory is 16.1GB. [2024-06-28 00:38:25,136 INFO L158 Benchmark]: TraceAbstraction took 20504.52ms. Allocated memory was 167.8MB in the beginning and 658.5MB in the end (delta: 490.7MB). Free memory was 136.0MB in the beginning and 594.1MB in the end (delta: -458.1MB). Peak memory consumption was 31.7MB. Max. memory is 16.1GB. [2024-06-28 00:38:25,137 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 0.16ms. Allocated memory is still 121.6MB. Free memory is still 72.3MB. There was no memory consumed. Max. memory is 16.1GB. * CDTParser took 0.76ms. Allocated memory is still 121.6MB. Free memory was 93.1MB in the beginning and 93.0MB in the end (delta: 111.0kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 630.59ms. Allocated memory is still 167.8MB. Free memory was 138.8MB in the beginning and 109.4MB in the end (delta: 29.4MB). Peak memory consumption was 29.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 69.71ms. Allocated memory is still 167.8MB. Free memory was 109.4MB in the beginning and 105.2MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 44.82ms. Allocated memory is still 167.8MB. Free memory was 105.2MB in the beginning and 102.1MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 752.42ms. Allocated memory is still 167.8MB. Free memory was 102.1MB in the beginning and 136.0MB in the end (delta: -33.9MB). Peak memory consumption was 61.4MB. Max. memory is 16.1GB. * TraceAbstraction took 20504.52ms. Allocated memory was 167.8MB in the beginning and 658.5MB in the end (delta: 490.7MB). Free memory was 136.0MB in the beginning and 594.1MB in the end (delta: -458.1MB). Peak memory consumption was 31.7MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 818]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 820]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 821]: 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, 67 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: 20.4s, OverallIterations: 35, TraceHistogramMax: 1, PathProgramHistogramMax: 7, EmptinessCheckTime: 0.0s, AutomataDifference: 7.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1157 SdHoareTripleChecker+Valid, 3.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 966 mSDsluCounter, 198 SdHoareTripleChecker+Invalid, 3.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 128 mSDsCounter, 219 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 5014 IncrementalHoareTripleChecker+Invalid, 5233 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 219 mSolverCounterUnsat, 70 mSDtfsCounter, 5014 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 180 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 180 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 2.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=657occurred in iteration=18, InterpolantAutomatonStates: 221, 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: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 12.3s InterpolantComputationTime, 645 NumberOfCodeBlocks, 645 NumberOfCodeBlocksAsserted, 35 NumberOfCheckSat, 610 ConstructedInterpolants, 0 QuantifiedInterpolants, 12962 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 35 InterpolantComputations, 35 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! [2024-06-28 00:38:25,162 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