./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix035.oepc.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/protection/mix035.oepc.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/mix035.oepc.i ./goblint.2024-06-19_11-23-25.files/protection/mix035.oepc.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 [2024-06-27 20:20:38,279 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 20:20:38,339 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 20:20:38,344 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 20:20:38,344 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 20:20:38,391 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 20:20:38,396 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 20:20:38,397 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 20:20:38,397 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 20:20:38,402 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 20:20:38,403 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 20:20:38,403 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 20:20:38,404 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 20:20:38,406 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 20:20:38,406 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 20:20:38,406 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 20:20:38,406 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 20:20:38,407 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 20:20:38,407 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 20:20:38,407 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 20:20:38,407 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 20:20:38,408 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 20:20:38,408 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 20:20:38,408 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 20:20:38,409 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 20:20:38,409 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 20:20:38,409 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 20:20:38,409 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 20:20:38,410 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 20:20:38,410 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 20:20:38,411 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 20:20:38,411 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 20:20:38,412 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 20:20:38,412 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 20:20:38,412 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 20:20:38,412 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 20:20:38,412 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 20:20:38,413 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 20:20:38,413 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 20:20:38,413 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 20:20:38,413 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 20:20:38,414 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 20:20:38,414 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 20:20:38,414 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-27 20:20:38,656 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 20:20:38,677 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 20:20:38,680 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 20:20:38,681 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 20:20:38,682 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 20:20:38,683 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/mix035.oepc.yml/witness.yml [2024-06-27 20:20:38,857 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 20:20:38,858 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 20:20:38,858 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix035.oepc.i [2024-06-27 20:20:39,989 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 20:20:40,237 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 20:20:40,238 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix035.oepc.i [2024-06-27 20:20:40,252 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f9efeb1ba/65c84ef7945f41d0a398e98a631b1cd0/FLAGa4f404319 [2024-06-27 20:20:40,264 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f9efeb1ba/65c84ef7945f41d0a398e98a631b1cd0 [2024-06-27 20:20:40,265 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 20:20:40,266 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 20:20:40,267 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 20:20:40,267 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 20:20:40,272 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 20:20:40,272 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 08:20:38" (1/2) ... [2024-06-27 20:20:40,273 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@50462682 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:20:40, skipping insertion in model container [2024-06-27 20:20:40,274 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 08:20:38" (1/2) ... [2024-06-27 20:20:40,275 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@57ecda37 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:20:40, skipping insertion in model container [2024-06-27 20:20:40,275 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 08:20:40" (2/2) ... [2024-06-27 20:20:40,275 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@50462682 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:20:40, skipping insertion in model container [2024-06-27 20:20:40,276 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 08:20:40" (2/2) ... [2024-06-27 20:20:40,276 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 20:20:40,376 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 20:20:40,378 INFO L97 edCorrectnessWitness]: Location invariant before [L851-L851] ((((((((((((((((((((! multithreaded || a$r_buff0_thd2 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || a$flush_delayed == (_Bool)0)) && (! multithreaded || a$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (a$mem_tmp == 0 || a$mem_tmp == 1))) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || a$read_delayed_var == 0)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || a$read_delayed == (_Bool)0)) && (! multithreaded || (a$w_buff0 == 0 || a$w_buff0 == 1))) && (! multithreaded || (a$w_buff1 == 0 || a$w_buff1 == 1))) && (! multithreaded || a$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || a$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || a$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || a$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) [2024-06-27 20:20:40,378 INFO L97 edCorrectnessWitness]: Location invariant before [L850-L850] ((((((((((((((((((((! multithreaded || a$r_buff0_thd2 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || a$flush_delayed == (_Bool)0)) && (! multithreaded || a$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (a$mem_tmp == 0 || a$mem_tmp == 1))) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || a$read_delayed_var == 0)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || a$read_delayed == (_Bool)0)) && (! multithreaded || (a$w_buff0 == 0 || a$w_buff0 == 1))) && (! multithreaded || (a$w_buff1 == 0 || a$w_buff1 == 1))) && (! multithreaded || a$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || a$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || a$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || a$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) [2024-06-27 20:20:40,379 INFO L97 edCorrectnessWitness]: Location invariant before [L848-L848] ((((((((((((((((((((! multithreaded || a$r_buff0_thd2 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || a$flush_delayed == (_Bool)0)) && (! multithreaded || a$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (a$mem_tmp == 0 || a$mem_tmp == 1))) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || a$read_delayed_var == 0)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || a$read_delayed == (_Bool)0)) && (! multithreaded || (a$w_buff0 == 0 || a$w_buff0 == 1))) && (! multithreaded || (a$w_buff1 == 0 || a$w_buff1 == 1))) && (! multithreaded || a$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || a$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || a$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || a$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) [2024-06-27 20:20:40,379 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 20:20:40,379 INFO L106 edCorrectnessWitness]: ghost_update [L846-L846] multithreaded = 1; [2024-06-27 20:20:40,429 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 20:20:40,860 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 20:20:40,869 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 20:20:41,008 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 20:20:41,043 INFO L206 MainTranslator]: Completed translation [2024-06-27 20:20:41,044 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:20:41 WrapperNode [2024-06-27 20:20:41,044 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 20:20:41,045 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 20:20:41,045 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 20:20:41,045 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 20:20:41,051 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:20:41" (1/1) ... [2024-06-27 20:20:41,066 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:20:41" (1/1) ... [2024-06-27 20:20:41,105 INFO L138 Inliner]: procedures = 175, calls = 47, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 128 [2024-06-27 20:20:41,105 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 20:20:41,106 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 20:20:41,106 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 20:20:41,106 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 20:20:41,123 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:20:41" (1/1) ... [2024-06-27 20:20:41,123 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:20:41" (1/1) ... [2024-06-27 20:20:41,142 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:20:41" (1/1) ... [2024-06-27 20:20:41,163 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]. [2024-06-27 20:20:41,169 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:20:41" (1/1) ... [2024-06-27 20:20:41,169 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:20:41" (1/1) ... [2024-06-27 20:20:41,178 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:20:41" (1/1) ... [2024-06-27 20:20:41,188 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:20:41" (1/1) ... [2024-06-27 20:20:41,193 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:20:41" (1/1) ... [2024-06-27 20:20:41,197 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:20:41" (1/1) ... [2024-06-27 20:20:41,201 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 20:20:41,206 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 20:20:41,207 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 20:20:41,207 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 20:20:41,208 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:20:41" (1/1) ... [2024-06-27 20:20:41,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 20:20:41,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 20:20:41,241 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) [2024-06-27 20:20:41,273 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 [2024-06-27 20:20:41,291 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 20:20:41,291 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 20:20:41,291 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-27 20:20:41,291 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-27 20:20:41,291 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-27 20:20:41,292 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-27 20:20:41,292 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-27 20:20:41,292 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-27 20:20:41,292 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 20:20:41,293 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 20:20:41,293 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 20:20:41,293 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 20:20:41,294 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-27 20:20:41,435 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 20:20:41,437 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 20:20:41,844 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 20:20:41,846 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 20:20:42,041 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 20:20:42,041 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-27 20:20:42,042 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 08:20:42 BoogieIcfgContainer [2024-06-27 20:20:42,042 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 20:20:42,045 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 20:20:42,046 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 20:20:42,049 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 20:20:42,049 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 08:20:38" (1/4) ... [2024-06-27 20:20:42,050 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74233ff3 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 08:20:42, skipping insertion in model container [2024-06-27 20:20:42,050 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 08:20:40" (2/4) ... [2024-06-27 20:20:42,050 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74233ff3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 08:20:42, skipping insertion in model container [2024-06-27 20:20:42,050 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:20:41" (3/4) ... [2024-06-27 20:20:42,051 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74233ff3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 08:20:42, skipping insertion in model container [2024-06-27 20:20:42,051 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 08:20:42" (4/4) ... [2024-06-27 20:20:42,052 INFO L112 eAbstractionObserver]: Analyzing ICFG mix035.oepc.i [2024-06-27 20:20:42,069 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 20:20:42,070 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-27 20:20:42,070 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 20:20:42,121 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 20:20:42,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 42 transitions, 96 flow [2024-06-27 20:20:42,187 INFO L124 PetriNetUnfolderBase]: 0/39 cut-off events. [2024-06-27 20:20:42,187 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 20:20:42,189 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49 conditions, 39 events. 0/39 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 64 event pairs, 0 based on Foata normal form. 0/36 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-27 20:20:42,189 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 42 transitions, 96 flow [2024-06-27 20:20:42,193 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 43 places, 33 transitions, 75 flow [2024-06-27 20:20:42,207 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 20:20:42,214 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;@bee63fa, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 20:20:42,214 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-27 20:20:42,220 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 20:20:42,221 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-27 20:20:42,221 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 20:20:42,221 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:20:42,222 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-27 20:20:42,222 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)] === [2024-06-27 20:20:42,228 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:20:42,228 INFO L85 PathProgramCache]: Analyzing trace with hash 380730443, now seen corresponding path program 1 times [2024-06-27 20:20:42,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:20:42,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606131515] [2024-06-27 20:20:42,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:20:42,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:20:42,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:20:43,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:20:43,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:20:43,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606131515] [2024-06-27 20:20:43,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606131515] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:20:43,549 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:20:43,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 20:20:43,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819816979] [2024-06-27 20:20:43,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:20:43,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 20:20:43,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:20:43,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 20:20:43,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 20:20:43,630 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 42 [2024-06-27 20:20:43,632 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 33 transitions, 75 flow. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 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) [2024-06-27 20:20:43,632 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:20:43,632 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 42 [2024-06-27 20:20:43,633 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:20:44,023 INFO L124 PetriNetUnfolderBase]: 1286/2001 cut-off events. [2024-06-27 20:20:44,023 INFO L125 PetriNetUnfolderBase]: For 29/29 co-relation queries the response was YES. [2024-06-27 20:20:44,031 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3997 conditions, 2001 events. 1286/2001 cut-off events. For 29/29 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 9705 event pairs, 892 based on Foata normal form. 1/1938 useless extension candidates. Maximal degree in co-relation 3985. Up to 1921 conditions per place. [2024-06-27 20:20:44,043 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 32 selfloop transitions, 4 changer transitions 0/43 dead transitions. [2024-06-27 20:20:44,044 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 43 transitions, 173 flow [2024-06-27 20:20:44,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 20:20:44,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 20:20:44,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 78 transitions. [2024-06-27 20:20:44,055 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-06-27 20:20:44,057 INFO L175 Difference]: Start difference. First operand has 43 places, 33 transitions, 75 flow. Second operand 3 states and 78 transitions. [2024-06-27 20:20:44,058 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 43 transitions, 173 flow [2024-06-27 20:20:44,060 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 43 transitions, 168 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-27 20:20:44,063 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 102 flow [2024-06-27 20:20:44,065 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=43, PETRI_TRANSITIONS=36} [2024-06-27 20:20:44,070 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 0 predicate places. [2024-06-27 20:20:44,070 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 102 flow [2024-06-27 20:20:44,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 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) [2024-06-27 20:20:44,070 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:20:44,071 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:20:44,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 20:20:44,071 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:20:44,072 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:20:44,072 INFO L85 PathProgramCache]: Analyzing trace with hash 810521078, now seen corresponding path program 1 times [2024-06-27 20:20:44,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:20:44,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474506278] [2024-06-27 20:20:44,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:20:44,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:20:44,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:20:45,041 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:20:45,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:20:45,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474506278] [2024-06-27 20:20:45,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474506278] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:20:45,042 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:20:45,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 20:20:45,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982365391] [2024-06-27 20:20:45,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:20:45,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 20:20:45,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:20:45,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 20:20:45,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-27 20:20:45,136 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 42 [2024-06-27 20:20:45,137 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 36 transitions, 102 flow. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 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) [2024-06-27 20:20:45,137 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:20:45,138 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 42 [2024-06-27 20:20:45,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:20:45,477 INFO L124 PetriNetUnfolderBase]: 1280/2000 cut-off events. [2024-06-27 20:20:45,477 INFO L125 PetriNetUnfolderBase]: For 384/384 co-relation queries the response was YES. [2024-06-27 20:20:45,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4521 conditions, 2000 events. 1280/2000 cut-off events. For 384/384 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 9691 event pairs, 750 based on Foata normal form. 3/1972 useless extension candidates. Maximal degree in co-relation 4509. Up to 1897 conditions per place. [2024-06-27 20:20:45,491 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 39 selfloop transitions, 7 changer transitions 0/53 dead transitions. [2024-06-27 20:20:45,491 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 53 transitions, 240 flow [2024-06-27 20:20:45,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 20:20:45,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 20:20:45,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 101 transitions. [2024-06-27 20:20:45,495 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6011904761904762 [2024-06-27 20:20:45,495 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 102 flow. Second operand 4 states and 101 transitions. [2024-06-27 20:20:45,495 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 53 transitions, 240 flow [2024-06-27 20:20:45,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 53 transitions, 236 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 20:20:45,499 INFO L231 Difference]: Finished difference. Result has 46 places, 39 transitions, 138 flow [2024-06-27 20:20:45,499 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=138, PETRI_PLACES=46, PETRI_TRANSITIONS=39} [2024-06-27 20:20:45,500 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 3 predicate places. [2024-06-27 20:20:45,500 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 39 transitions, 138 flow [2024-06-27 20:20:45,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 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) [2024-06-27 20:20:45,501 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:20:45,501 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:20:45,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 20:20:45,504 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:20:45,504 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:20:45,505 INFO L85 PathProgramCache]: Analyzing trace with hash 1521713301, now seen corresponding path program 1 times [2024-06-27 20:20:45,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:20:45,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442620373] [2024-06-27 20:20:45,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:20:45,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:20:45,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:20:47,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:20:47,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:20:47,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442620373] [2024-06-27 20:20:47,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442620373] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:20:47,067 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:20:47,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 20:20:47,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619951532] [2024-06-27 20:20:47,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:20:47,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 20:20:47,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:20:47,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 20:20:47,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-27 20:20:47,157 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 20:20:47,158 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 39 transitions, 138 flow. Second operand has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 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) [2024-06-27 20:20:47,158 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:20:47,158 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 20:20:47,158 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:20:47,628 INFO L124 PetriNetUnfolderBase]: 1552/2399 cut-off events. [2024-06-27 20:20:47,628 INFO L125 PetriNetUnfolderBase]: For 1253/1253 co-relation queries the response was YES. [2024-06-27 20:20:47,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6001 conditions, 2399 events. 1552/2399 cut-off events. For 1253/1253 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 11700 event pairs, 697 based on Foata normal form. 3/2365 useless extension candidates. Maximal degree in co-relation 5987. Up to 2262 conditions per place. [2024-06-27 20:20:47,644 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 54 selfloop transitions, 13 changer transitions 0/73 dead transitions. [2024-06-27 20:20:47,645 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 73 transitions, 374 flow [2024-06-27 20:20:47,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:20:47,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:20:47,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 142 transitions. [2024-06-27 20:20:47,650 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5634920634920635 [2024-06-27 20:20:47,650 INFO L175 Difference]: Start difference. First operand has 46 places, 39 transitions, 138 flow. Second operand 6 states and 142 transitions. [2024-06-27 20:20:47,650 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 73 transitions, 374 flow [2024-06-27 20:20:47,653 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 73 transitions, 354 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-27 20:20:47,654 INFO L231 Difference]: Finished difference. Result has 51 places, 45 transitions, 196 flow [2024-06-27 20:20:47,654 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=196, PETRI_PLACES=51, PETRI_TRANSITIONS=45} [2024-06-27 20:20:47,656 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 8 predicate places. [2024-06-27 20:20:47,656 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 45 transitions, 196 flow [2024-06-27 20:20:47,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 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) [2024-06-27 20:20:47,656 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:20:47,656 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:20:47,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 20:20:47,657 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:20:47,657 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:20:47,657 INFO L85 PathProgramCache]: Analyzing trace with hash -927427979, now seen corresponding path program 1 times [2024-06-27 20:20:47,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:20:47,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474143043] [2024-06-27 20:20:47,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:20:47,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:20:47,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:20:49,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:20:49,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:20:49,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474143043] [2024-06-27 20:20:49,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474143043] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:20:49,447 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:20:49,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:20:49,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595103055] [2024-06-27 20:20:49,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:20:49,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:20:49,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:20:49,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:20:49,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:20:49,606 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 20:20:49,607 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 45 transitions, 196 flow. Second operand has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:20:49,607 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:20:49,607 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 20:20:49,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:20:50,138 INFO L124 PetriNetUnfolderBase]: 1543/2382 cut-off events. [2024-06-27 20:20:50,138 INFO L125 PetriNetUnfolderBase]: For 2475/2475 co-relation queries the response was YES. [2024-06-27 20:20:50,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6652 conditions, 2382 events. 1543/2382 cut-off events. For 2475/2475 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 11548 event pairs, 534 based on Foata normal form. 6/2351 useless extension candidates. Maximal degree in co-relation 6636. Up to 2217 conditions per place. [2024-06-27 20:20:50,154 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 58 selfloop transitions, 15 changer transitions 0/79 dead transitions. [2024-06-27 20:20:50,154 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 79 transitions, 434 flow [2024-06-27 20:20:50,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:20:50,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:20:50,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 160 transitions. [2024-06-27 20:20:50,157 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.54421768707483 [2024-06-27 20:20:50,157 INFO L175 Difference]: Start difference. First operand has 51 places, 45 transitions, 196 flow. Second operand 7 states and 160 transitions. [2024-06-27 20:20:50,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 79 transitions, 434 flow [2024-06-27 20:20:50,161 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 79 transitions, 406 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-27 20:20:50,163 INFO L231 Difference]: Finished difference. Result has 54 places, 46 transitions, 217 flow [2024-06-27 20:20:50,163 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=217, PETRI_PLACES=54, PETRI_TRANSITIONS=46} [2024-06-27 20:20:50,165 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 11 predicate places. [2024-06-27 20:20:50,165 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 46 transitions, 217 flow [2024-06-27 20:20:50,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:20:50,165 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:20:50,165 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:20:50,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 20:20:50,166 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)] === [2024-06-27 20:20:50,166 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:20:50,166 INFO L85 PathProgramCache]: Analyzing trace with hash -1592252480, now seen corresponding path program 1 times [2024-06-27 20:20:50,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:20:50,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842529524] [2024-06-27 20:20:50,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:20:50,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:20:50,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:20:50,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:20:50,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:20:50,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842529524] [2024-06-27 20:20:50,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842529524] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:20:50,844 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:20:50,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 20:20:50,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181351354] [2024-06-27 20:20:50,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:20:50,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 20:20:50,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:20:50,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 20:20:50,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-27 20:20:50,903 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:20:50,903 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 46 transitions, 217 flow. Second operand has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:20:50,903 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:20:50,903 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:20:50,903 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:20:51,462 INFO L124 PetriNetUnfolderBase]: 1533/2402 cut-off events. [2024-06-27 20:20:51,462 INFO L125 PetriNetUnfolderBase]: For 3736/3736 co-relation queries the response was YES. [2024-06-27 20:20:51,468 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7070 conditions, 2402 events. 1533/2402 cut-off events. For 3736/3736 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 11848 event pairs, 610 based on Foata normal form. 4/2397 useless extension candidates. Maximal degree in co-relation 7052. Up to 2260 conditions per place. [2024-06-27 20:20:51,481 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 48 selfloop transitions, 8 changer transitions 0/61 dead transitions. [2024-06-27 20:20:51,481 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 61 transitions, 375 flow [2024-06-27 20:20:51,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 20:20:51,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 20:20:51,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 97 transitions. [2024-06-27 20:20:51,483 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46190476190476193 [2024-06-27 20:20:51,483 INFO L175 Difference]: Start difference. First operand has 54 places, 46 transitions, 217 flow. Second operand 5 states and 97 transitions. [2024-06-27 20:20:51,484 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 61 transitions, 375 flow [2024-06-27 20:20:51,491 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 61 transitions, 336 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-27 20:20:51,492 INFO L231 Difference]: Finished difference. Result has 54 places, 49 transitions, 224 flow [2024-06-27 20:20:51,493 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=224, PETRI_PLACES=54, PETRI_TRANSITIONS=49} [2024-06-27 20:20:51,495 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 11 predicate places. [2024-06-27 20:20:51,495 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 49 transitions, 224 flow [2024-06-27 20:20:51,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:20:51,496 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:20:51,496 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:20:51,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 20:20:51,497 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)] === [2024-06-27 20:20:51,497 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:20:51,497 INFO L85 PathProgramCache]: Analyzing trace with hash -80306019, now seen corresponding path program 1 times [2024-06-27 20:20:51,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:20:51,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563447165] [2024-06-27 20:20:51,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:20:51,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:20:51,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:20:52,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:20:52,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:20:52,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563447165] [2024-06-27 20:20:52,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563447165] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:20:52,486 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:20:52,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:20:52,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925568723] [2024-06-27 20:20:52,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:20:52,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:20:52,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:20:52,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:20:52,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:20:52,584 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:20:52,584 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 49 transitions, 224 flow. Second operand has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:20:52,585 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:20:52,585 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:20:52,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:20:53,005 INFO L124 PetriNetUnfolderBase]: 1571/2452 cut-off events. [2024-06-27 20:20:53,005 INFO L125 PetriNetUnfolderBase]: For 5193/5193 co-relation queries the response was YES. [2024-06-27 20:20:53,010 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7739 conditions, 2452 events. 1571/2452 cut-off events. For 5193/5193 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 12097 event pairs, 574 based on Foata normal form. 4/2444 useless extension candidates. Maximal degree in co-relation 7719. Up to 2267 conditions per place. [2024-06-27 20:20:53,024 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 59 selfloop transitions, 16 changer transitions 0/80 dead transitions. [2024-06-27 20:20:53,025 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 80 transitions, 510 flow [2024-06-27 20:20:53,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:20:53,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:20:53,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 122 transitions. [2024-06-27 20:20:53,026 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48412698412698413 [2024-06-27 20:20:53,026 INFO L175 Difference]: Start difference. First operand has 54 places, 49 transitions, 224 flow. Second operand 6 states and 122 transitions. [2024-06-27 20:20:53,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 80 transitions, 510 flow [2024-06-27 20:20:53,032 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 80 transitions, 476 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-06-27 20:20:53,034 INFO L231 Difference]: Finished difference. Result has 58 places, 58 transitions, 310 flow [2024-06-27 20:20:53,034 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=310, PETRI_PLACES=58, PETRI_TRANSITIONS=58} [2024-06-27 20:20:53,038 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 15 predicate places. [2024-06-27 20:20:53,038 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 58 transitions, 310 flow [2024-06-27 20:20:53,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:20:53,038 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:20:53,038 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:20:53,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 20:20:53,039 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:20:53,040 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:20:53,040 INFO L85 PathProgramCache]: Analyzing trace with hash -1134632039, now seen corresponding path program 2 times [2024-06-27 20:20:53,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:20:53,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196039255] [2024-06-27 20:20:53,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:20:53,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:20:53,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:20:53,836 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:20:53,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:20:53,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196039255] [2024-06-27 20:20:53,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196039255] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:20:53,840 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:20:53,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:20:53,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782104291] [2024-06-27 20:20:53,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:20:53,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:20:53,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:20:53,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:20:53,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:20:53,937 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:20:53,937 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 58 transitions, 310 flow. Second operand has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:20:53,938 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:20:53,938 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:20:53,938 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:20:54,431 INFO L124 PetriNetUnfolderBase]: 1561/2441 cut-off events. [2024-06-27 20:20:54,432 INFO L125 PetriNetUnfolderBase]: For 7111/7111 co-relation queries the response was YES. [2024-06-27 20:20:54,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8433 conditions, 2441 events. 1561/2441 cut-off events. For 7111/7111 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 12082 event pairs, 586 based on Foata normal form. 4/2434 useless extension candidates. Maximal degree in co-relation 8411. Up to 2292 conditions per place. [2024-06-27 20:20:54,456 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 58 selfloop transitions, 11 changer transitions 0/74 dead transitions. [2024-06-27 20:20:54,456 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 74 transitions, 490 flow [2024-06-27 20:20:54,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:20:54,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:20:54,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 114 transitions. [2024-06-27 20:20:54,461 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-27 20:20:54,461 INFO L175 Difference]: Start difference. First operand has 58 places, 58 transitions, 310 flow. Second operand 6 states and 114 transitions. [2024-06-27 20:20:54,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 74 transitions, 490 flow [2024-06-27 20:20:54,467 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 74 transitions, 462 flow, removed 13 selfloop flow, removed 1 redundant places. [2024-06-27 20:20:54,469 INFO L231 Difference]: Finished difference. Result has 63 places, 58 transitions, 312 flow [2024-06-27 20:20:54,469 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=282, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=312, PETRI_PLACES=63, PETRI_TRANSITIONS=58} [2024-06-27 20:20:54,470 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 20 predicate places. [2024-06-27 20:20:54,470 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 58 transitions, 312 flow [2024-06-27 20:20:54,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:20:54,471 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:20:54,471 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:20:54,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 20:20:54,471 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:20:54,472 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:20:54,472 INFO L85 PathProgramCache]: Analyzing trace with hash -1180460917, now seen corresponding path program 1 times [2024-06-27 20:20:54,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:20:54,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523574158] [2024-06-27 20:20:54,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:20:54,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:20:54,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:20:55,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:20:55,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:20:55,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523574158] [2024-06-27 20:20:55,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523574158] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:20:55,643 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:20:55,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:20:55,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749968311] [2024-06-27 20:20:55,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:20:55,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:20:55,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:20:55,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:20:55,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:20:55,773 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:20:55,773 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 58 transitions, 312 flow. Second operand has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 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) [2024-06-27 20:20:55,773 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:20:55,773 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:20:55,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:20:56,352 INFO L124 PetriNetUnfolderBase]: 1583/2465 cut-off events. [2024-06-27 20:20:56,353 INFO L125 PetriNetUnfolderBase]: For 8491/8491 co-relation queries the response was YES. [2024-06-27 20:20:56,359 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8665 conditions, 2465 events. 1583/2465 cut-off events. For 8491/8491 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 12110 event pairs, 579 based on Foata normal form. 4/2454 useless extension candidates. Maximal degree in co-relation 8640. Up to 2303 conditions per place. [2024-06-27 20:20:56,369 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 68 selfloop transitions, 14 changer transitions 0/87 dead transitions. [2024-06-27 20:20:56,369 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 87 transitions, 568 flow [2024-06-27 20:20:56,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:20:56,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:20:56,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 137 transitions. [2024-06-27 20:20:56,370 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46598639455782315 [2024-06-27 20:20:56,371 INFO L175 Difference]: Start difference. First operand has 63 places, 58 transitions, 312 flow. Second operand 7 states and 137 transitions. [2024-06-27 20:20:56,371 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 87 transitions, 568 flow [2024-06-27 20:20:56,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 87 transitions, 532 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-27 20:20:56,379 INFO L231 Difference]: Finished difference. Result has 64 places, 61 transitions, 342 flow [2024-06-27 20:20:56,379 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=276, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=342, PETRI_PLACES=64, PETRI_TRANSITIONS=61} [2024-06-27 20:20:56,381 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 21 predicate places. [2024-06-27 20:20:56,381 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 61 transitions, 342 flow [2024-06-27 20:20:56,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 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) [2024-06-27 20:20:56,381 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:20:56,381 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:20:56,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 20:20:56,382 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:20:56,382 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:20:56,382 INFO L85 PathProgramCache]: Analyzing trace with hash 1805481561, now seen corresponding path program 2 times [2024-06-27 20:20:56,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:20:56,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228677452] [2024-06-27 20:20:56,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:20:56,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:20:56,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:20:57,475 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:20:57,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:20:57,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228677452] [2024-06-27 20:20:57,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228677452] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:20:57,475 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:20:57,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:20:57,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004185200] [2024-06-27 20:20:57,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:20:57,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:20:57,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:20:57,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:20:57,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:20:57,582 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:20:57,582 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 61 transitions, 342 flow. Second operand has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 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) [2024-06-27 20:20:57,582 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:20:57,582 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:20:57,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:20:58,077 INFO L124 PetriNetUnfolderBase]: 1621/2517 cut-off events. [2024-06-27 20:20:58,078 INFO L125 PetriNetUnfolderBase]: For 10846/10846 co-relation queries the response was YES. [2024-06-27 20:20:58,083 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9468 conditions, 2517 events. 1621/2517 cut-off events. For 10846/10846 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 12329 event pairs, 551 based on Foata normal form. 4/2505 useless extension candidates. Maximal degree in co-relation 9444. Up to 2261 conditions per place. [2024-06-27 20:20:58,091 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 63 selfloop transitions, 26 changer transitions 0/94 dead transitions. [2024-06-27 20:20:58,092 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 94 transitions, 684 flow [2024-06-27 20:20:58,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:20:58,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:20:58,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 142 transitions. [2024-06-27 20:20:58,093 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48299319727891155 [2024-06-27 20:20:58,093 INFO L175 Difference]: Start difference. First operand has 64 places, 61 transitions, 342 flow. Second operand 7 states and 142 transitions. [2024-06-27 20:20:58,093 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 94 transitions, 684 flow [2024-06-27 20:20:58,100 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 94 transitions, 642 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-27 20:20:58,102 INFO L231 Difference]: Finished difference. Result has 66 places, 67 transitions, 426 flow [2024-06-27 20:20:58,102 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=300, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=426, PETRI_PLACES=66, PETRI_TRANSITIONS=67} [2024-06-27 20:20:58,103 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 23 predicate places. [2024-06-27 20:20:58,103 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 67 transitions, 426 flow [2024-06-27 20:20:58,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 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) [2024-06-27 20:20:58,103 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:20:58,103 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:20:58,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 20:20:58,104 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:20:58,104 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:20:58,104 INFO L85 PathProgramCache]: Analyzing trace with hash -813853987, now seen corresponding path program 3 times [2024-06-27 20:20:58,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:20:58,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631200337] [2024-06-27 20:20:58,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:20:58,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:20:58,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:20:58,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:20:58,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:20:59,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631200337] [2024-06-27 20:20:59,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631200337] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:20:59,000 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:20:59,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:20:59,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309700307] [2024-06-27 20:20:59,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:20:59,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:20:59,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:20:59,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:20:59,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:20:59,117 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:20:59,118 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 67 transitions, 426 flow. Second operand has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 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) [2024-06-27 20:20:59,118 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:20:59,118 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:20:59,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:20:59,597 INFO L124 PetriNetUnfolderBase]: 1611/2506 cut-off events. [2024-06-27 20:20:59,598 INFO L125 PetriNetUnfolderBase]: For 13676/13676 co-relation queries the response was YES. [2024-06-27 20:20:59,604 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9961 conditions, 2506 events. 1611/2506 cut-off events. For 13676/13676 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 12324 event pairs, 581 based on Foata normal form. 4/2495 useless extension candidates. Maximal degree in co-relation 9936. Up to 2342 conditions per place. [2024-06-27 20:20:59,613 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 69 selfloop transitions, 14 changer transitions 0/88 dead transitions. [2024-06-27 20:20:59,613 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 88 transitions, 648 flow [2024-06-27 20:20:59,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:20:59,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:20:59,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-27 20:20:59,615 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4489795918367347 [2024-06-27 20:20:59,615 INFO L175 Difference]: Start difference. First operand has 66 places, 67 transitions, 426 flow. Second operand 7 states and 132 transitions. [2024-06-27 20:20:59,615 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 88 transitions, 648 flow [2024-06-27 20:20:59,625 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 88 transitions, 592 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-06-27 20:20:59,629 INFO L231 Difference]: Finished difference. Result has 70 places, 67 transitions, 406 flow [2024-06-27 20:20:59,630 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=370, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=406, PETRI_PLACES=70, PETRI_TRANSITIONS=67} [2024-06-27 20:20:59,631 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 27 predicate places. [2024-06-27 20:20:59,631 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 67 transitions, 406 flow [2024-06-27 20:20:59,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 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) [2024-06-27 20:20:59,631 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:20:59,631 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:20:59,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 20:20:59,632 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:20:59,632 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:20:59,632 INFO L85 PathProgramCache]: Analyzing trace with hash 1404626615, now seen corresponding path program 1 times [2024-06-27 20:20:59,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:20:59,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633448727] [2024-06-27 20:20:59,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:20:59,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:20:59,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:21:01,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:21:01,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:21:01,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633448727] [2024-06-27 20:21:01,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633448727] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:21:01,012 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:21:01,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:21:01,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304805044] [2024-06-27 20:21:01,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:21:01,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:21:01,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:21:01,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:21:01,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:21:01,108 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:21:01,108 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 67 transitions, 406 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 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) [2024-06-27 20:21:01,108 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:21:01,108 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:21:01,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:21:01,789 INFO L124 PetriNetUnfolderBase]: 1962/2995 cut-off events. [2024-06-27 20:21:01,790 INFO L125 PetriNetUnfolderBase]: For 18161/18161 co-relation queries the response was YES. [2024-06-27 20:21:01,798 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11865 conditions, 2995 events. 1962/2995 cut-off events. For 18161/18161 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 14250 event pairs, 723 based on Foata normal form. 4/2979 useless extension candidates. Maximal degree in co-relation 11838. Up to 2853 conditions per place. [2024-06-27 20:21:01,810 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 73 selfloop transitions, 15 changer transitions 0/92 dead transitions. [2024-06-27 20:21:01,811 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 92 transitions, 679 flow [2024-06-27 20:21:01,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:21:01,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:21:01,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-27 20:21:01,812 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42517006802721086 [2024-06-27 20:21:01,812 INFO L175 Difference]: Start difference. First operand has 70 places, 67 transitions, 406 flow. Second operand 7 states and 125 transitions. [2024-06-27 20:21:01,812 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 92 transitions, 679 flow [2024-06-27 20:21:01,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 92 transitions, 630 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-27 20:21:01,828 INFO L231 Difference]: Finished difference. Result has 72 places, 72 transitions, 451 flow [2024-06-27 20:21:01,828 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=362, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=451, PETRI_PLACES=72, PETRI_TRANSITIONS=72} [2024-06-27 20:21:01,829 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 29 predicate places. [2024-06-27 20:21:01,829 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 72 transitions, 451 flow [2024-06-27 20:21:01,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 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) [2024-06-27 20:21:01,829 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:21:01,830 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:21:01,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-27 20:21:01,830 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)] === [2024-06-27 20:21:01,830 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:21:01,830 INFO L85 PathProgramCache]: Analyzing trace with hash 875555837, now seen corresponding path program 1 times [2024-06-27 20:21:01,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:21:01,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88419830] [2024-06-27 20:21:01,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:21:01,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:21:01,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:21:02,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:21:02,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:21:02,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88419830] [2024-06-27 20:21:02,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88419830] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:21:02,420 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:21:02,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 20:21:02,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515022041] [2024-06-27 20:21:02,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:21:02,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 20:21:02,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:21:02,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 20:21:02,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-27 20:21:02,483 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:21:02,484 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 72 transitions, 451 flow. Second operand has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:21:02,484 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:21:02,484 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:21:02,484 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:21:02,937 INFO L124 PetriNetUnfolderBase]: 1799/2813 cut-off events. [2024-06-27 20:21:02,938 INFO L125 PetriNetUnfolderBase]: For 21116/21122 co-relation queries the response was YES. [2024-06-27 20:21:02,946 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11762 conditions, 2813 events. 1799/2813 cut-off events. For 21116/21122 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 13854 event pairs, 723 based on Foata normal form. 7/2809 useless extension candidates. Maximal degree in co-relation 11733. Up to 2667 conditions per place. [2024-06-27 20:21:02,958 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 67 selfloop transitions, 8 changer transitions 0/83 dead transitions. [2024-06-27 20:21:02,958 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 83 transitions, 641 flow [2024-06-27 20:21:02,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 20:21:02,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 20:21:02,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 92 transitions. [2024-06-27 20:21:02,959 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4380952380952381 [2024-06-27 20:21:02,959 INFO L175 Difference]: Start difference. First operand has 72 places, 72 transitions, 451 flow. Second operand 5 states and 92 transitions. [2024-06-27 20:21:02,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 83 transitions, 641 flow [2024-06-27 20:21:02,973 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 83 transitions, 596 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-27 20:21:02,975 INFO L231 Difference]: Finished difference. Result has 73 places, 75 transitions, 454 flow [2024-06-27 20:21:02,975 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=406, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=454, PETRI_PLACES=73, PETRI_TRANSITIONS=75} [2024-06-27 20:21:02,976 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 30 predicate places. [2024-06-27 20:21:02,976 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 75 transitions, 454 flow [2024-06-27 20:21:02,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:21:02,976 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:21:02,976 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:21:02,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-27 20:21:02,977 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:21:02,977 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:21:02,977 INFO L85 PathProgramCache]: Analyzing trace with hash -613800298, now seen corresponding path program 1 times [2024-06-27 20:21:02,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:21:02,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406124428] [2024-06-27 20:21:02,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:21:02,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:21:02,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:21:04,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:21:04,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:21:04,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406124428] [2024-06-27 20:21:04,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406124428] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:21:04,314 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:21:04,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:21:04,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413772617] [2024-06-27 20:21:04,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:21:04,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:21:04,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:21:04,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:21:04,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:21:04,449 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:21:04,449 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 75 transitions, 454 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 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) [2024-06-27 20:21:04,449 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:21:04,449 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:21:04,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:21:05,188 INFO L124 PetriNetUnfolderBase]: 1897/2928 cut-off events. [2024-06-27 20:21:05,188 INFO L125 PetriNetUnfolderBase]: For 24175/24175 co-relation queries the response was YES. [2024-06-27 20:21:05,195 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12649 conditions, 2928 events. 1897/2928 cut-off events. For 24175/24175 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 14561 event pairs, 682 based on Foata normal form. 4/2926 useless extension candidates. Maximal degree in co-relation 12619. Up to 2693 conditions per place. [2024-06-27 20:21:05,207 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 93 selfloop transitions, 23 changer transitions 0/122 dead transitions. [2024-06-27 20:21:05,207 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 122 transitions, 908 flow [2024-06-27 20:21:05,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:21:05,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:21:05,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 179 transitions. [2024-06-27 20:21:05,209 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47354497354497355 [2024-06-27 20:21:05,209 INFO L175 Difference]: Start difference. First operand has 73 places, 75 transitions, 454 flow. Second operand 9 states and 179 transitions. [2024-06-27 20:21:05,209 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 122 transitions, 908 flow [2024-06-27 20:21:05,229 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 122 transitions, 882 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-27 20:21:05,231 INFO L231 Difference]: Finished difference. Result has 79 places, 81 transitions, 556 flow [2024-06-27 20:21:05,231 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=428, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=556, PETRI_PLACES=79, PETRI_TRANSITIONS=81} [2024-06-27 20:21:05,232 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 36 predicate places. [2024-06-27 20:21:05,232 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 81 transitions, 556 flow [2024-06-27 20:21:05,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 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) [2024-06-27 20:21:05,232 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:21:05,232 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:21:05,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 20:21:05,233 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:21:05,233 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:21:05,233 INFO L85 PathProgramCache]: Analyzing trace with hash -613710088, now seen corresponding path program 2 times [2024-06-27 20:21:05,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:21:05,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472098141] [2024-06-27 20:21:05,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:21:05,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:21:05,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:21:06,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:21:06,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:21:06,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472098141] [2024-06-27 20:21:06,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472098141] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:21:06,588 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:21:06,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:21:06,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984233379] [2024-06-27 20:21:06,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:21:06,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:21:06,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:21:06,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:21:06,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:21:06,719 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:21:06,720 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 81 transitions, 556 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 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) [2024-06-27 20:21:06,720 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:21:06,720 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:21:06,720 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:21:07,294 INFO L124 PetriNetUnfolderBase]: 1887/2914 cut-off events. [2024-06-27 20:21:07,295 INFO L125 PetriNetUnfolderBase]: For 28078/28078 co-relation queries the response was YES. [2024-06-27 20:21:07,300 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13231 conditions, 2914 events. 1887/2914 cut-off events. For 28078/28078 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 14487 event pairs, 684 based on Foata normal form. 4/2912 useless extension candidates. Maximal degree in co-relation 13200. Up to 2718 conditions per place. [2024-06-27 20:21:07,312 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 89 selfloop transitions, 17 changer transitions 0/112 dead transitions. [2024-06-27 20:21:07,312 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 112 transitions, 850 flow [2024-06-27 20:21:07,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:21:07,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:21:07,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-27 20:21:07,314 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46130952380952384 [2024-06-27 20:21:07,314 INFO L175 Difference]: Start difference. First operand has 79 places, 81 transitions, 556 flow. Second operand 8 states and 155 transitions. [2024-06-27 20:21:07,314 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 112 transitions, 850 flow [2024-06-27 20:21:07,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 112 transitions, 780 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-27 20:21:07,337 INFO L231 Difference]: Finished difference. Result has 82 places, 81 transitions, 528 flow [2024-06-27 20:21:07,337 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=486, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=528, PETRI_PLACES=82, PETRI_TRANSITIONS=81} [2024-06-27 20:21:07,338 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 39 predicate places. [2024-06-27 20:21:07,338 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 81 transitions, 528 flow [2024-06-27 20:21:07,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 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) [2024-06-27 20:21:07,338 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:21:07,339 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:21:07,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-27 20:21:07,339 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:21:07,339 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:21:07,339 INFO L85 PathProgramCache]: Analyzing trace with hash -609991018, now seen corresponding path program 3 times [2024-06-27 20:21:07,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:21:07,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415110404] [2024-06-27 20:21:07,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:21:07,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:21:07,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:21:08,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:21:08,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:21:08,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415110404] [2024-06-27 20:21:08,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415110404] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:21:08,530 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:21:08,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:21:08,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483902569] [2024-06-27 20:21:08,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:21:08,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:21:08,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:21:08,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:21:08,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:21:08,682 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:21:08,682 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 81 transitions, 528 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 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) [2024-06-27 20:21:08,682 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:21:08,682 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:21:08,682 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:21:09,264 INFO L124 PetriNetUnfolderBase]: 1909/2948 cut-off events. [2024-06-27 20:21:09,265 INFO L125 PetriNetUnfolderBase]: For 31493/31493 co-relation queries the response was YES. [2024-06-27 20:21:09,272 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13599 conditions, 2948 events. 1909/2948 cut-off events. For 31493/31493 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 14769 event pairs, 622 based on Foata normal form. 4/2949 useless extension candidates. Maximal degree in co-relation 13566. Up to 2621 conditions per place. [2024-06-27 20:21:09,284 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 78 selfloop transitions, 36 changer transitions 0/120 dead transitions. [2024-06-27 20:21:09,284 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 120 transitions, 982 flow [2024-06-27 20:21:09,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:21:09,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:21:09,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 161 transitions. [2024-06-27 20:21:09,287 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4791666666666667 [2024-06-27 20:21:09,287 INFO L175 Difference]: Start difference. First operand has 82 places, 81 transitions, 528 flow. Second operand 8 states and 161 transitions. [2024-06-27 20:21:09,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 120 transitions, 982 flow [2024-06-27 20:21:09,307 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 120 transitions, 940 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-27 20:21:09,309 INFO L231 Difference]: Finished difference. Result has 84 places, 87 transitions, 673 flow [2024-06-27 20:21:09,310 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=486, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=673, PETRI_PLACES=84, PETRI_TRANSITIONS=87} [2024-06-27 20:21:09,311 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 41 predicate places. [2024-06-27 20:21:09,311 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 87 transitions, 673 flow [2024-06-27 20:21:09,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 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) [2024-06-27 20:21:09,311 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:21:09,311 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:21:09,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-27 20:21:09,312 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:21:09,312 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:21:09,312 INFO L85 PathProgramCache]: Analyzing trace with hash 540331064, now seen corresponding path program 4 times [2024-06-27 20:21:09,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:21:09,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15657704] [2024-06-27 20:21:09,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:21:09,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:21:09,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:21:10,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:21:10,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:21:10,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15657704] [2024-06-27 20:21:10,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15657704] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:21:10,504 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:21:10,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:21:10,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847794090] [2024-06-27 20:21:10,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:21:10,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:21:10,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:21:10,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:21:10,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:21:10,648 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:21:10,648 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 87 transitions, 673 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 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) [2024-06-27 20:21:10,648 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:21:10,648 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:21:10,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:21:11,238 INFO L124 PetriNetUnfolderBase]: 1902/2941 cut-off events. [2024-06-27 20:21:11,238 INFO L125 PetriNetUnfolderBase]: For 36561/36561 co-relation queries the response was YES. [2024-06-27 20:21:11,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14382 conditions, 2941 events. 1902/2941 cut-off events. For 36561/36561 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 14659 event pairs, 658 based on Foata normal form. 4/2939 useless extension candidates. Maximal degree in co-relation 14347. Up to 2694 conditions per place. [2024-06-27 20:21:11,255 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 90 selfloop transitions, 27 changer transitions 0/123 dead transitions. [2024-06-27 20:21:11,255 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 123 transitions, 1191 flow [2024-06-27 20:21:11,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:21:11,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:21:11,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-27 20:21:11,256 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46130952380952384 [2024-06-27 20:21:11,257 INFO L175 Difference]: Start difference. First operand has 84 places, 87 transitions, 673 flow. Second operand 8 states and 155 transitions. [2024-06-27 20:21:11,257 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 123 transitions, 1191 flow [2024-06-27 20:21:11,284 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 123 transitions, 1133 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-06-27 20:21:11,286 INFO L231 Difference]: Finished difference. Result has 89 places, 93 transitions, 785 flow [2024-06-27 20:21:11,286 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=615, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=785, PETRI_PLACES=89, PETRI_TRANSITIONS=93} [2024-06-27 20:21:11,287 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 46 predicate places. [2024-06-27 20:21:11,287 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 93 transitions, 785 flow [2024-06-27 20:21:11,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 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) [2024-06-27 20:21:11,287 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:21:11,287 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:21:11,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-27 20:21:11,288 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:21:11,288 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:21:11,288 INFO L85 PathProgramCache]: Analyzing trace with hash -465885286, now seen corresponding path program 1 times [2024-06-27 20:21:11,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:21:11,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851915712] [2024-06-27 20:21:11,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:21:11,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:21:11,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:21:12,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:21:12,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:21:12,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851915712] [2024-06-27 20:21:12,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851915712] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:21:12,412 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:21:12,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:21:12,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603434033] [2024-06-27 20:21:12,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:21:12,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:21:12,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:21:12,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:21:12,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:21:12,574 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:21:12,575 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 93 transitions, 785 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 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) [2024-06-27 20:21:12,575 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:21:12,575 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:21:12,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:21:13,266 INFO L124 PetriNetUnfolderBase]: 2063/3147 cut-off events. [2024-06-27 20:21:13,266 INFO L125 PetriNetUnfolderBase]: For 42173/42173 co-relation queries the response was YES. [2024-06-27 20:21:13,273 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16068 conditions, 3147 events. 2063/3147 cut-off events. For 42173/42173 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 14984 event pairs, 714 based on Foata normal form. 2/3148 useless extension candidates. Maximal degree in co-relation 16030. Up to 2993 conditions per place. [2024-06-27 20:21:13,282 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 93 selfloop transitions, 19 changer transitions 0/116 dead transitions. [2024-06-27 20:21:13,282 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 116 transitions, 1095 flow [2024-06-27 20:21:13,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:21:13,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:21:13,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-27 20:21:13,283 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-27 20:21:13,283 INFO L175 Difference]: Start difference. First operand has 89 places, 93 transitions, 785 flow. Second operand 7 states and 126 transitions. [2024-06-27 20:21:13,284 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 116 transitions, 1095 flow [2024-06-27 20:21:13,309 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 116 transitions, 970 flow, removed 35 selfloop flow, removed 5 redundant places. [2024-06-27 20:21:13,311 INFO L231 Difference]: Finished difference. Result has 91 places, 96 transitions, 750 flow [2024-06-27 20:21:13,311 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=664, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=750, PETRI_PLACES=91, PETRI_TRANSITIONS=96} [2024-06-27 20:21:13,312 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 48 predicate places. [2024-06-27 20:21:13,312 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 96 transitions, 750 flow [2024-06-27 20:21:13,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 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) [2024-06-27 20:21:13,312 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:21:13,312 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:21:13,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-27 20:21:13,313 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)] === [2024-06-27 20:21:13,313 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:21:13,313 INFO L85 PathProgramCache]: Analyzing trace with hash 1372428667, now seen corresponding path program 1 times [2024-06-27 20:21:13,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:21:13,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969920251] [2024-06-27 20:21:13,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:21:13,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:21:13,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:21:13,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:21:13,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:21:13,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969920251] [2024-06-27 20:21:13,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969920251] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:21:13,994 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:21:13,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:21:13,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705720158] [2024-06-27 20:21:13,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:21:13,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:21:13,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:21:13,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:21:13,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:21:14,053 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:21:14,053 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 96 transitions, 750 flow. Second operand has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:21:14,053 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:21:14,053 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:21:14,053 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:21:14,587 INFO L124 PetriNetUnfolderBase]: 2145/3233 cut-off events. [2024-06-27 20:21:14,587 INFO L125 PetriNetUnfolderBase]: For 52658/52678 co-relation queries the response was YES. [2024-06-27 20:21:14,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17087 conditions, 3233 events. 2145/3233 cut-off events. For 52658/52678 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 15386 event pairs, 821 based on Foata normal form. 7/3225 useless extension candidates. Maximal degree in co-relation 17048. Up to 3168 conditions per place. [2024-06-27 20:21:14,607 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 88 selfloop transitions, 11 changer transitions 0/108 dead transitions. [2024-06-27 20:21:14,607 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 108 transitions, 994 flow [2024-06-27 20:21:14,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:21:14,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:21:14,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 101 transitions. [2024-06-27 20:21:14,608 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4007936507936508 [2024-06-27 20:21:14,609 INFO L175 Difference]: Start difference. First operand has 91 places, 96 transitions, 750 flow. Second operand 6 states and 101 transitions. [2024-06-27 20:21:14,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 108 transitions, 994 flow [2024-06-27 20:21:14,637 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 108 transitions, 952 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-27 20:21:14,639 INFO L231 Difference]: Finished difference. Result has 91 places, 99 transitions, 766 flow [2024-06-27 20:21:14,639 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=708, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=766, PETRI_PLACES=91, PETRI_TRANSITIONS=99} [2024-06-27 20:21:14,640 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 48 predicate places. [2024-06-27 20:21:14,640 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 99 transitions, 766 flow [2024-06-27 20:21:14,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:21:14,640 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:21:14,640 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:21:14,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-27 20:21:14,640 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:21:14,641 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:21:14,641 INFO L85 PathProgramCache]: Analyzing trace with hash -217127242, now seen corresponding path program 1 times [2024-06-27 20:21:14,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:21:14,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51236740] [2024-06-27 20:21:14,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:21:14,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:21:14,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:21:16,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:21:16,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:21:16,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51236740] [2024-06-27 20:21:16,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51236740] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:21:16,130 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:21:16,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:21:16,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486372904] [2024-06-27 20:21:16,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:21:16,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:21:16,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:21:16,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:21:16,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:21:16,362 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:21:16,362 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 99 transitions, 766 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:21:16,362 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:21:16,362 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:21:16,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:21:17,192 INFO L124 PetriNetUnfolderBase]: 2214/3406 cut-off events. [2024-06-27 20:21:17,192 INFO L125 PetriNetUnfolderBase]: For 64507/64507 co-relation queries the response was YES. [2024-06-27 20:21:17,201 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18874 conditions, 3406 events. 2214/3406 cut-off events. For 64507/64507 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 17595 event pairs, 586 based on Foata normal form. 16/3408 useless extension candidates. Maximal degree in co-relation 18834. Up to 2867 conditions per place. [2024-06-27 20:21:17,211 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 121 selfloop transitions, 26 changer transitions 0/154 dead transitions. [2024-06-27 20:21:17,211 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 154 transitions, 1352 flow [2024-06-27 20:21:17,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:21:17,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:21:17,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 201 transitions. [2024-06-27 20:21:17,213 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4785714285714286 [2024-06-27 20:21:17,213 INFO L175 Difference]: Start difference. First operand has 91 places, 99 transitions, 766 flow. Second operand 10 states and 201 transitions. [2024-06-27 20:21:17,213 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 154 transitions, 1352 flow [2024-06-27 20:21:17,259 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 154 transitions, 1316 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-27 20:21:17,261 INFO L231 Difference]: Finished difference. Result has 97 places, 101 transitions, 842 flow [2024-06-27 20:21:17,261 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=730, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=842, PETRI_PLACES=97, PETRI_TRANSITIONS=101} [2024-06-27 20:21:17,262 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 54 predicate places. [2024-06-27 20:21:17,262 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 101 transitions, 842 flow [2024-06-27 20:21:17,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:21:17,262 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:21:17,262 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:21:17,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-27 20:21:17,262 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:21:17,263 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:21:17,263 INFO L85 PathProgramCache]: Analyzing trace with hash 285210566, now seen corresponding path program 2 times [2024-06-27 20:21:17,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:21:17,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210820814] [2024-06-27 20:21:17,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:21:17,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:21:17,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:21:18,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:21:18,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:21:18,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210820814] [2024-06-27 20:21:18,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210820814] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:21:18,713 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:21:18,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:21:18,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043675365] [2024-06-27 20:21:18,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:21:18,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:21:18,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:21:18,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:21:18,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:21:18,862 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:21:18,863 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 101 transitions, 842 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:21:18,863 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:21:18,863 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:21:18,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:21:19,638 INFO L124 PetriNetUnfolderBase]: 2285/3535 cut-off events. [2024-06-27 20:21:19,638 INFO L125 PetriNetUnfolderBase]: For 73507/73507 co-relation queries the response was YES. [2024-06-27 20:21:19,647 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20030 conditions, 3535 events. 2285/3535 cut-off events. For 73507/73507 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 18506 event pairs, 725 based on Foata normal form. 20/3545 useless extension candidates. Maximal degree in co-relation 19989. Up to 3167 conditions per place. [2024-06-27 20:21:19,658 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 119 selfloop transitions, 24 changer transitions 0/150 dead transitions. [2024-06-27 20:21:19,659 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 150 transitions, 1304 flow [2024-06-27 20:21:19,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:21:19,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:21:19,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 197 transitions. [2024-06-27 20:21:19,660 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46904761904761905 [2024-06-27 20:21:19,661 INFO L175 Difference]: Start difference. First operand has 97 places, 101 transitions, 842 flow. Second operand 10 states and 197 transitions. [2024-06-27 20:21:19,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 150 transitions, 1304 flow [2024-06-27 20:21:19,695 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 150 transitions, 1266 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-27 20:21:19,696 INFO L231 Difference]: Finished difference. Result has 101 places, 102 transitions, 889 flow [2024-06-27 20:21:19,697 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=804, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=889, PETRI_PLACES=101, PETRI_TRANSITIONS=102} [2024-06-27 20:21:19,697 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 58 predicate places. [2024-06-27 20:21:19,697 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 102 transitions, 889 flow [2024-06-27 20:21:19,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:21:19,697 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:21:19,697 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:21:19,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-27 20:21:19,697 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:21:19,698 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:21:19,698 INFO L85 PathProgramCache]: Analyzing trace with hash -1845142628, now seen corresponding path program 3 times [2024-06-27 20:21:19,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:21:19,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940246106] [2024-06-27 20:21:19,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:21:19,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:21:19,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:21:21,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:21:21,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:21:21,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940246106] [2024-06-27 20:21:21,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940246106] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:21:21,306 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:21:21,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:21:21,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214144081] [2024-06-27 20:21:21,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:21:21,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:21:21,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:21:21,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:21:21,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:21:21,470 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:21:21,470 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 102 transitions, 889 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:21:21,470 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:21:21,470 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:21:21,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:21:22,216 INFO L124 PetriNetUnfolderBase]: 2246/3480 cut-off events. [2024-06-27 20:21:22,216 INFO L125 PetriNetUnfolderBase]: For 76180/76180 co-relation queries the response was YES. [2024-06-27 20:21:22,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19718 conditions, 3480 events. 2246/3480 cut-off events. For 76180/76180 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 18128 event pairs, 695 based on Foata normal form. 20/3492 useless extension candidates. Maximal degree in co-relation 19675. Up to 3139 conditions per place. [2024-06-27 20:21:22,238 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 117 selfloop transitions, 18 changer transitions 0/142 dead transitions. [2024-06-27 20:21:22,238 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 142 transitions, 1285 flow [2024-06-27 20:21:22,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:21:22,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:21:22,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-27 20:21:22,240 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46296296296296297 [2024-06-27 20:21:22,240 INFO L175 Difference]: Start difference. First operand has 101 places, 102 transitions, 889 flow. Second operand 9 states and 175 transitions. [2024-06-27 20:21:22,240 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 142 transitions, 1285 flow [2024-06-27 20:21:22,275 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 142 transitions, 1226 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-27 20:21:22,276 INFO L231 Difference]: Finished difference. Result has 102 places, 102 transitions, 873 flow [2024-06-27 20:21:22,277 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=830, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=873, PETRI_PLACES=102, PETRI_TRANSITIONS=102} [2024-06-27 20:21:22,277 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 59 predicate places. [2024-06-27 20:21:22,277 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 102 transitions, 873 flow [2024-06-27 20:21:22,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:21:22,277 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:21:22,277 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:21:22,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-27 20:21:22,278 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:21:22,278 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:21:22,278 INFO L85 PathProgramCache]: Analyzing trace with hash -1729851458, now seen corresponding path program 4 times [2024-06-27 20:21:22,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:21:22,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977649326] [2024-06-27 20:21:22,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:21:22,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:21:22,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:21:23,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:21:23,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:21:23,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977649326] [2024-06-27 20:21:23,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977649326] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:21:23,617 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:21:23,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:21:23,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631519069] [2024-06-27 20:21:23,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:21:23,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:21:23,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:21:23,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:21:23,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:21:23,831 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:21:23,832 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 102 transitions, 873 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:21:23,832 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:21:23,832 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:21:23,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:21:24,524 INFO L124 PetriNetUnfolderBase]: 2318/3604 cut-off events. [2024-06-27 20:21:24,524 INFO L125 PetriNetUnfolderBase]: For 83096/83096 co-relation queries the response was YES. [2024-06-27 20:21:24,533 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20498 conditions, 3604 events. 2318/3604 cut-off events. For 83096/83096 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 19088 event pairs, 642 based on Foata normal form. 20/3621 useless extension candidates. Maximal degree in co-relation 20454. Up to 3102 conditions per place. [2024-06-27 20:21:24,545 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 96 selfloop transitions, 41 changer transitions 0/144 dead transitions. [2024-06-27 20:21:24,545 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 144 transitions, 1385 flow [2024-06-27 20:21:24,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:21:24,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:21:24,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 181 transitions. [2024-06-27 20:21:24,546 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47883597883597884 [2024-06-27 20:21:24,546 INFO L175 Difference]: Start difference. First operand has 102 places, 102 transitions, 873 flow. Second operand 9 states and 181 transitions. [2024-06-27 20:21:24,546 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 144 transitions, 1385 flow [2024-06-27 20:21:24,576 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 144 transitions, 1339 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-27 20:21:24,578 INFO L231 Difference]: Finished difference. Result has 103 places, 103 transitions, 946 flow [2024-06-27 20:21:24,578 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=827, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=946, PETRI_PLACES=103, PETRI_TRANSITIONS=103} [2024-06-27 20:21:24,578 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 60 predicate places. [2024-06-27 20:21:24,578 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 103 transitions, 946 flow [2024-06-27 20:21:24,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:21:24,579 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:21:24,579 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:21:24,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-27 20:21:24,579 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:21:24,580 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:21:24,580 INFO L85 PathProgramCache]: Analyzing trace with hash -546893394, now seen corresponding path program 1 times [2024-06-27 20:21:24,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:21:24,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719167351] [2024-06-27 20:21:24,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:21:24,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:21:24,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:21:26,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:21:26,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:21:26,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719167351] [2024-06-27 20:21:26,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719167351] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:21:26,054 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:21:26,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:21:26,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360035332] [2024-06-27 20:21:26,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:21:26,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:21:26,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:21:26,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:21:26,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:21:26,161 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:21:26,161 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 103 transitions, 946 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 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) [2024-06-27 20:21:26,161 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:21:26,161 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:21:26,162 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:21:26,738 INFO L124 PetriNetUnfolderBase]: 2500/3844 cut-off events. [2024-06-27 20:21:26,738 INFO L125 PetriNetUnfolderBase]: For 88060/88062 co-relation queries the response was YES. [2024-06-27 20:21:26,749 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21982 conditions, 3844 events. 2500/3844 cut-off events. For 88060/88062 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 19570 event pairs, 798 based on Foata normal form. 4/3847 useless extension candidates. Maximal degree in co-relation 21937. Up to 3601 conditions per place. [2024-06-27 20:21:26,763 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 107 selfloop transitions, 26 changer transitions 0/138 dead transitions. [2024-06-27 20:21:26,763 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 138 transitions, 1350 flow [2024-06-27 20:21:26,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:21:26,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:21:26,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-27 20:21:26,764 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44345238095238093 [2024-06-27 20:21:26,764 INFO L175 Difference]: Start difference. First operand has 103 places, 103 transitions, 946 flow. Second operand 8 states and 149 transitions. [2024-06-27 20:21:26,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 138 transitions, 1350 flow [2024-06-27 20:21:26,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 138 transitions, 1257 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-27 20:21:26,868 INFO L231 Difference]: Finished difference. Result has 105 places, 108 transitions, 980 flow [2024-06-27 20:21:26,868 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=857, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=980, PETRI_PLACES=105, PETRI_TRANSITIONS=108} [2024-06-27 20:21:26,868 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 62 predicate places. [2024-06-27 20:21:26,869 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 108 transitions, 980 flow [2024-06-27 20:21:26,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 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) [2024-06-27 20:21:26,869 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:21:26,869 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:21:26,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-27 20:21:26,869 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)] === [2024-06-27 20:21:26,870 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:21:26,870 INFO L85 PathProgramCache]: Analyzing trace with hash -859114564, now seen corresponding path program 1 times [2024-06-27 20:21:26,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:21:26,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889935829] [2024-06-27 20:21:26,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:21:26,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:21:26,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:21:27,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:21:27,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:21:27,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889935829] [2024-06-27 20:21:27,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889935829] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:21:27,650 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:21:27,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:21:27,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610040330] [2024-06-27 20:21:27,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:21:27,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:21:27,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:21:27,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:21:27,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:21:27,761 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:21:27,761 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 108 transitions, 980 flow. Second operand has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 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) [2024-06-27 20:21:27,762 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:21:27,762 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:21:27,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:21:28,240 INFO L124 PetriNetUnfolderBase]: 2429/3771 cut-off events. [2024-06-27 20:21:28,240 INFO L125 PetriNetUnfolderBase]: For 92831/92853 co-relation queries the response was YES. [2024-06-27 20:21:28,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22023 conditions, 3771 events. 2429/3771 cut-off events. For 92831/92853 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 19459 event pairs, 868 based on Foata normal form. 6/3769 useless extension candidates. Maximal degree in co-relation 21976. Up to 3538 conditions per place. [2024-06-27 20:21:28,263 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 99 selfloop transitions, 18 changer transitions 0/130 dead transitions. [2024-06-27 20:21:28,263 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 130 transitions, 1356 flow [2024-06-27 20:21:28,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:21:28,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:21:28,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 115 transitions. [2024-06-27 20:21:28,264 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45634920634920634 [2024-06-27 20:21:28,264 INFO L175 Difference]: Start difference. First operand has 105 places, 108 transitions, 980 flow. Second operand 6 states and 115 transitions. [2024-06-27 20:21:28,264 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 130 transitions, 1356 flow [2024-06-27 20:21:28,316 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 130 transitions, 1275 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-27 20:21:28,317 INFO L231 Difference]: Finished difference. Result has 106 places, 114 transitions, 1004 flow [2024-06-27 20:21:28,317 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=899, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1004, PETRI_PLACES=106, PETRI_TRANSITIONS=114} [2024-06-27 20:21:28,318 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 63 predicate places. [2024-06-27 20:21:28,318 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 114 transitions, 1004 flow [2024-06-27 20:21:28,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 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) [2024-06-27 20:21:28,318 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:21:28,318 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:21:28,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-27 20:21:28,318 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:21:28,318 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:21:28,318 INFO L85 PathProgramCache]: Analyzing trace with hash 989814718, now seen corresponding path program 5 times [2024-06-27 20:21:28,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:21:28,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140989948] [2024-06-27 20:21:28,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:21:28,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:21:28,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:21:29,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:21:29,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:21:29,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140989948] [2024-06-27 20:21:29,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140989948] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:21:29,551 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:21:29,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:21:29,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773472380] [2024-06-27 20:21:29,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:21:29,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:21:29,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:21:29,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:21:29,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:21:29,703 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:21:29,703 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 114 transitions, 1004 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:21:29,703 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:21:29,703 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:21:29,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:21:30,366 INFO L124 PetriNetUnfolderBase]: 2406/3741 cut-off events. [2024-06-27 20:21:30,367 INFO L125 PetriNetUnfolderBase]: For 102969/102973 co-relation queries the response was YES. [2024-06-27 20:21:30,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22237 conditions, 3741 events. 2406/3741 cut-off events. For 102969/102973 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 19865 event pairs, 764 based on Foata normal form. 24/3759 useless extension candidates. Maximal degree in co-relation 22189. Up to 3254 conditions per place. [2024-06-27 20:21:30,391 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 113 selfloop transitions, 31 changer transitions 0/152 dead transitions. [2024-06-27 20:21:30,391 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 152 transitions, 1532 flow [2024-06-27 20:21:30,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:21:30,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:21:30,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-27 20:21:30,393 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4576719576719577 [2024-06-27 20:21:30,393 INFO L175 Difference]: Start difference. First operand has 106 places, 114 transitions, 1004 flow. Second operand 9 states and 173 transitions. [2024-06-27 20:21:30,393 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 152 transitions, 1532 flow [2024-06-27 20:21:30,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 152 transitions, 1502 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-06-27 20:21:30,460 INFO L231 Difference]: Finished difference. Result has 113 places, 115 transitions, 1077 flow [2024-06-27 20:21:30,460 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=974, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1077, PETRI_PLACES=113, PETRI_TRANSITIONS=115} [2024-06-27 20:21:30,460 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 70 predicate places. [2024-06-27 20:21:30,460 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 115 transitions, 1077 flow [2024-06-27 20:21:30,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:21:30,461 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:21:30,461 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:21:30,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-27 20:21:30,461 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:21:30,461 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:21:30,461 INFO L85 PathProgramCache]: Analyzing trace with hash -1557540876, now seen corresponding path program 2 times [2024-06-27 20:21:30,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:21:30,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674813769] [2024-06-27 20:21:30,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:21:30,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:21:30,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:21:31,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:21:31,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:21:31,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674813769] [2024-06-27 20:21:31,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674813769] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:21:31,704 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:21:31,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:21:31,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503903127] [2024-06-27 20:21:31,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:21:31,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:21:31,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:21:31,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:21:31,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:21:31,821 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:21:31,821 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 115 transitions, 1077 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 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) [2024-06-27 20:21:31,821 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:21:31,821 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:21:31,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:21:32,547 INFO L124 PetriNetUnfolderBase]: 2601/3992 cut-off events. [2024-06-27 20:21:32,548 INFO L125 PetriNetUnfolderBase]: For 107819/107819 co-relation queries the response was YES. [2024-06-27 20:21:32,560 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23974 conditions, 3992 events. 2601/3992 cut-off events. For 107819/107819 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 20312 event pairs, 842 based on Foata normal form. 4/3995 useless extension candidates. Maximal degree in co-relation 23924. Up to 3796 conditions per place. [2024-06-27 20:21:32,571 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 116 selfloop transitions, 21 changer transitions 0/142 dead transitions. [2024-06-27 20:21:32,572 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 142 transitions, 1457 flow [2024-06-27 20:21:32,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:21:32,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:21:32,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-27 20:21:32,573 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4226190476190476 [2024-06-27 20:21:32,573 INFO L175 Difference]: Start difference. First operand has 113 places, 115 transitions, 1077 flow. Second operand 8 states and 142 transitions. [2024-06-27 20:21:32,573 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 142 transitions, 1457 flow [2024-06-27 20:21:32,640 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 142 transitions, 1384 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-27 20:21:32,642 INFO L231 Difference]: Finished difference. Result has 114 places, 117 transitions, 1100 flow [2024-06-27 20:21:32,642 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1004, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1100, PETRI_PLACES=114, PETRI_TRANSITIONS=117} [2024-06-27 20:21:32,642 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 71 predicate places. [2024-06-27 20:21:32,643 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 117 transitions, 1100 flow [2024-06-27 20:21:32,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 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) [2024-06-27 20:21:32,643 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:21:32,643 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:21:32,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-27 20:21:32,643 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:21:32,644 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:21:32,644 INFO L85 PathProgramCache]: Analyzing trace with hash 73339840, now seen corresponding path program 3 times [2024-06-27 20:21:32,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:21:32,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569787592] [2024-06-27 20:21:32,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:21:32,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:21:32,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:21:33,729 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:21:33,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:21:33,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569787592] [2024-06-27 20:21:33,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569787592] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:21:33,730 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:21:33,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:21:33,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744287155] [2024-06-27 20:21:33,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:21:33,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:21:33,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:21:33,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:21:33,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:21:33,875 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:21:33,876 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 117 transitions, 1100 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 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) [2024-06-27 20:21:33,876 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:21:33,876 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:21:33,876 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:21:34,540 INFO L124 PetriNetUnfolderBase]: 2618/4019 cut-off events. [2024-06-27 20:21:34,541 INFO L125 PetriNetUnfolderBase]: For 113349/113349 co-relation queries the response was YES. [2024-06-27 20:21:34,554 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24274 conditions, 4019 events. 2618/4019 cut-off events. For 113349/113349 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 20455 event pairs, 823 based on Foata normal form. 4/4022 useless extension candidates. Maximal degree in co-relation 24223. Up to 3832 conditions per place. [2024-06-27 20:21:34,568 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 122 selfloop transitions, 17 changer transitions 0/144 dead transitions. [2024-06-27 20:21:34,568 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 144 transitions, 1486 flow [2024-06-27 20:21:34,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:21:34,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:21:34,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-27 20:21:34,569 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41964285714285715 [2024-06-27 20:21:34,569 INFO L175 Difference]: Start difference. First operand has 114 places, 117 transitions, 1100 flow. Second operand 8 states and 141 transitions. [2024-06-27 20:21:34,569 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 144 transitions, 1486 flow [2024-06-27 20:21:34,630 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 144 transitions, 1410 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-27 20:21:34,632 INFO L231 Difference]: Finished difference. Result has 116 places, 119 transitions, 1115 flow [2024-06-27 20:21:34,632 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1024, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1115, PETRI_PLACES=116, PETRI_TRANSITIONS=119} [2024-06-27 20:21:34,633 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 73 predicate places. [2024-06-27 20:21:34,633 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 119 transitions, 1115 flow [2024-06-27 20:21:34,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 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) [2024-06-27 20:21:34,633 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:21:34,633 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:21:34,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-27 20:21:34,633 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:21:34,633 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:21:34,633 INFO L85 PathProgramCache]: Analyzing trace with hash 1572669912, now seen corresponding path program 1 times [2024-06-27 20:21:34,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:21:34,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967584987] [2024-06-27 20:21:34,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:21:34,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:21:34,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:21:35,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:21:35,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:21:35,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967584987] [2024-06-27 20:21:35,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967584987] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:21:35,725 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:21:35,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:21:35,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611492667] [2024-06-27 20:21:35,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:21:35,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:21:35,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:21:35,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:21:35,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:21:35,874 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:21:35,875 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 119 transitions, 1115 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 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) [2024-06-27 20:21:35,875 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:21:35,875 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:21:35,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:21:36,612 INFO L124 PetriNetUnfolderBase]: 2620/4011 cut-off events. [2024-06-27 20:21:36,612 INFO L125 PetriNetUnfolderBase]: For 119391/119391 co-relation queries the response was YES. [2024-06-27 20:21:36,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24491 conditions, 4011 events. 2620/4011 cut-off events. For 119391/119391 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 20318 event pairs, 878 based on Foata normal form. 2/4012 useless extension candidates. Maximal degree in co-relation 24439. Up to 3806 conditions per place. [2024-06-27 20:21:36,634 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 117 selfloop transitions, 25 changer transitions 0/147 dead transitions. [2024-06-27 20:21:36,634 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 147 transitions, 1491 flow [2024-06-27 20:21:36,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:21:36,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:21:36,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-27 20:21:36,635 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4255952380952381 [2024-06-27 20:21:36,635 INFO L175 Difference]: Start difference. First operand has 116 places, 119 transitions, 1115 flow. Second operand 8 states and 143 transitions. [2024-06-27 20:21:36,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 147 transitions, 1491 flow [2024-06-27 20:21:36,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 147 transitions, 1396 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-06-27 20:21:36,725 INFO L231 Difference]: Finished difference. Result has 118 places, 122 transitions, 1114 flow [2024-06-27 20:21:36,725 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1020, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1114, PETRI_PLACES=118, PETRI_TRANSITIONS=122} [2024-06-27 20:21:36,726 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 75 predicate places. [2024-06-27 20:21:36,726 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 122 transitions, 1114 flow [2024-06-27 20:21:36,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 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) [2024-06-27 20:21:36,726 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:21:36,726 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:21:36,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-27 20:21:36,726 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:21:36,727 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:21:36,727 INFO L85 PathProgramCache]: Analyzing trace with hash 989999416, now seen corresponding path program 4 times [2024-06-27 20:21:36,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:21:36,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379660150] [2024-06-27 20:21:36,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:21:36,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:21:36,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:21:37,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:21:37,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:21:37,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379660150] [2024-06-27 20:21:37,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379660150] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:21:37,815 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:21:37,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:21:37,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248378608] [2024-06-27 20:21:37,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:21:37,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:21:37,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:21:37,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:21:37,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:21:37,915 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:21:37,915 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 122 transitions, 1114 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 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) [2024-06-27 20:21:37,915 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:21:37,915 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:21:37,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:21:38,570 INFO L124 PetriNetUnfolderBase]: 2612/3999 cut-off events. [2024-06-27 20:21:38,570 INFO L125 PetriNetUnfolderBase]: For 125444/125444 co-relation queries the response was YES. [2024-06-27 20:21:38,584 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24535 conditions, 3999 events. 2612/3999 cut-off events. For 125444/125444 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 20273 event pairs, 851 based on Foata normal form. 4/4002 useless extension candidates. Maximal degree in co-relation 24482. Up to 3799 conditions per place. [2024-06-27 20:21:38,598 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 127 selfloop transitions, 21 changer transitions 0/153 dead transitions. [2024-06-27 20:21:38,598 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 153 transitions, 1556 flow [2024-06-27 20:21:38,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:21:38,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:21:38,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-27 20:21:38,599 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-27 20:21:38,599 INFO L175 Difference]: Start difference. First operand has 118 places, 122 transitions, 1114 flow. Second operand 8 states and 144 transitions. [2024-06-27 20:21:38,599 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 153 transitions, 1556 flow [2024-06-27 20:21:38,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 153 transitions, 1501 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-27 20:21:38,676 INFO L231 Difference]: Finished difference. Result has 120 places, 127 transitions, 1200 flow [2024-06-27 20:21:38,676 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1060, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1200, PETRI_PLACES=120, PETRI_TRANSITIONS=127} [2024-06-27 20:21:38,676 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 77 predicate places. [2024-06-27 20:21:38,676 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 127 transitions, 1200 flow [2024-06-27 20:21:38,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 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) [2024-06-27 20:21:38,677 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:21:38,677 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:21:38,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-27 20:21:38,677 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)] === [2024-06-27 20:21:38,677 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:21:38,677 INFO L85 PathProgramCache]: Analyzing trace with hash -404396644, now seen corresponding path program 2 times [2024-06-27 20:21:38,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:21:38,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888317122] [2024-06-27 20:21:38,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:21:38,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:21:38,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:21:39,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:21:39,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:21:39,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888317122] [2024-06-27 20:21:39,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888317122] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:21:39,333 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:21:39,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:21:39,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443005567] [2024-06-27 20:21:39,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:21:39,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:21:39,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:21:39,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:21:39,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:21:39,432 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:21:39,433 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 127 transitions, 1200 flow. Second operand has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 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) [2024-06-27 20:21:39,433 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:21:39,433 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:21:39,433 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:21:39,975 INFO L124 PetriNetUnfolderBase]: 2453/3828 cut-off events. [2024-06-27 20:21:39,976 INFO L125 PetriNetUnfolderBase]: For 131269/131279 co-relation queries the response was YES. [2024-06-27 20:21:39,990 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23989 conditions, 3828 events. 2453/3828 cut-off events. For 131269/131279 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 19911 event pairs, 850 based on Foata normal form. 2/3815 useless extension candidates. Maximal degree in co-relation 23934. Up to 3608 conditions per place. [2024-06-27 20:21:40,003 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 108 selfloop transitions, 11 changer transitions 0/136 dead transitions. [2024-06-27 20:21:40,003 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 136 transitions, 1460 flow [2024-06-27 20:21:40,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:21:40,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:21:40,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 106 transitions. [2024-06-27 20:21:40,004 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-06-27 20:21:40,004 INFO L175 Difference]: Start difference. First operand has 120 places, 127 transitions, 1200 flow. Second operand 6 states and 106 transitions. [2024-06-27 20:21:40,004 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 136 transitions, 1460 flow [2024-06-27 20:21:40,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 136 transitions, 1353 flow, removed 35 selfloop flow, removed 5 redundant places. [2024-06-27 20:21:40,077 INFO L231 Difference]: Finished difference. Result has 121 places, 127 transitions, 1121 flow [2024-06-27 20:21:40,077 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1093, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1121, PETRI_PLACES=121, PETRI_TRANSITIONS=127} [2024-06-27 20:21:40,077 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 78 predicate places. [2024-06-27 20:21:40,078 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 127 transitions, 1121 flow [2024-06-27 20:21:40,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 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) [2024-06-27 20:21:40,078 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:21:40,078 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:21:40,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-27 20:21:40,078 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)] === [2024-06-27 20:21:40,078 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:21:40,078 INFO L85 PathProgramCache]: Analyzing trace with hash 1420116408, now seen corresponding path program 1 times [2024-06-27 20:21:40,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:21:40,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037167767] [2024-06-27 20:21:40,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:21:40,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:21:40,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:21:40,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:21:40,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:21:40,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037167767] [2024-06-27 20:21:40,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037167767] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:21:40,623 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:21:40,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:21:40,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069640086] [2024-06-27 20:21:40,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:21:40,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:21:40,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:21:40,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:21:40,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:21:40,708 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:21:40,709 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 127 transitions, 1121 flow. Second operand has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:21:40,709 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:21:40,709 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:21:40,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:21:41,330 INFO L124 PetriNetUnfolderBase]: 2611/3998 cut-off events. [2024-06-27 20:21:41,330 INFO L125 PetriNetUnfolderBase]: For 139332/139332 co-relation queries the response was YES. [2024-06-27 20:21:41,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25126 conditions, 3998 events. 2611/3998 cut-off events. For 139332/139332 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 20225 event pairs, 870 based on Foata normal form. 1/3998 useless extension candidates. Maximal degree in co-relation 25070. Up to 3860 conditions per place. [2024-06-27 20:21:41,360 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 125 selfloop transitions, 16 changer transitions 0/146 dead transitions. [2024-06-27 20:21:41,360 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 146 transitions, 1547 flow [2024-06-27 20:21:41,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:21:41,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:21:41,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 107 transitions. [2024-06-27 20:21:41,361 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4246031746031746 [2024-06-27 20:21:41,361 INFO L175 Difference]: Start difference. First operand has 121 places, 127 transitions, 1121 flow. Second operand 6 states and 107 transitions. [2024-06-27 20:21:41,361 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 146 transitions, 1547 flow [2024-06-27 20:21:41,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 146 transitions, 1511 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-27 20:21:41,468 INFO L231 Difference]: Finished difference. Result has 122 places, 133 transitions, 1181 flow [2024-06-27 20:21:41,468 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1085, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1181, PETRI_PLACES=122, PETRI_TRANSITIONS=133} [2024-06-27 20:21:41,468 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 79 predicate places. [2024-06-27 20:21:41,468 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 133 transitions, 1181 flow [2024-06-27 20:21:41,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:21:41,468 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:21:41,468 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:21:41,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-27 20:21:41,469 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)] === [2024-06-27 20:21:41,469 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:21:41,469 INFO L85 PathProgramCache]: Analyzing trace with hash -388908982, now seen corresponding path program 2 times [2024-06-27 20:21:41,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:21:41,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289340737] [2024-06-27 20:21:41,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:21:41,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:21:41,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:21:42,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:21:42,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:21:42,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289340737] [2024-06-27 20:21:42,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289340737] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:21:42,025 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:21:42,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:21:42,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226101097] [2024-06-27 20:21:42,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:21:42,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:21:42,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:21:42,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:21:42,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:21:42,076 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:21:42,076 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 133 transitions, 1181 flow. Second operand has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:21:42,076 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:21:42,076 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:21:42,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:21:42,757 INFO L124 PetriNetUnfolderBase]: 2608/3995 cut-off events. [2024-06-27 20:21:42,758 INFO L125 PetriNetUnfolderBase]: For 148115/148117 co-relation queries the response was YES. [2024-06-27 20:21:42,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25744 conditions, 3995 events. 2608/3995 cut-off events. For 148115/148117 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 20246 event pairs, 873 based on Foata normal form. 3/3997 useless extension candidates. Maximal degree in co-relation 25687. Up to 3857 conditions per place. [2024-06-27 20:21:42,794 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 121 selfloop transitions, 16 changer transitions 0/142 dead transitions. [2024-06-27 20:21:42,794 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 142 transitions, 1477 flow [2024-06-27 20:21:42,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:21:42,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:21:42,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 103 transitions. [2024-06-27 20:21:42,795 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4087301587301587 [2024-06-27 20:21:42,795 INFO L175 Difference]: Start difference. First operand has 122 places, 133 transitions, 1181 flow. Second operand 6 states and 103 transitions. [2024-06-27 20:21:42,795 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 142 transitions, 1477 flow [2024-06-27 20:21:42,891 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 142 transitions, 1431 flow, removed 19 selfloop flow, removed 2 redundant places. [2024-06-27 20:21:42,892 INFO L231 Difference]: Finished difference. Result has 126 places, 133 transitions, 1173 flow [2024-06-27 20:21:42,892 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1135, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1173, PETRI_PLACES=126, PETRI_TRANSITIONS=133} [2024-06-27 20:21:42,893 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 83 predicate places. [2024-06-27 20:21:42,893 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 133 transitions, 1173 flow [2024-06-27 20:21:42,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:21:42,893 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:21:42,893 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:21:42,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-27 20:21:42,894 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)] === [2024-06-27 20:21:42,894 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:21:42,894 INFO L85 PathProgramCache]: Analyzing trace with hash -404382756, now seen corresponding path program 1 times [2024-06-27 20:21:42,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:21:42,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564684285] [2024-06-27 20:21:42,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:21:42,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:21:42,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:21:43,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:21:43,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:21:43,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564684285] [2024-06-27 20:21:43,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564684285] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:21:43,543 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:21:43,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:21:43,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86192495] [2024-06-27 20:21:43,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:21:43,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:21:43,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:21:43,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:21:43,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:21:43,611 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:21:43,611 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 133 transitions, 1173 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:21:43,611 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:21:43,612 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:21:43,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:21:44,310 INFO L124 PetriNetUnfolderBase]: 2571/3949 cut-off events. [2024-06-27 20:21:44,310 INFO L125 PetriNetUnfolderBase]: For 152356/152361 co-relation queries the response was YES. [2024-06-27 20:21:44,325 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25236 conditions, 3949 events. 2571/3949 cut-off events. For 152356/152361 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 20019 event pairs, 878 based on Foata normal form. 3/3944 useless extension candidates. Maximal degree in co-relation 25177. Up to 3833 conditions per place. [2024-06-27 20:21:44,338 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 119 selfloop transitions, 14 changer transitions 0/148 dead transitions. [2024-06-27 20:21:44,338 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 148 transitions, 1499 flow [2024-06-27 20:21:44,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:21:44,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:21:44,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-27 20:21:44,341 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3945578231292517 [2024-06-27 20:21:44,341 INFO L175 Difference]: Start difference. First operand has 126 places, 133 transitions, 1173 flow. Second operand 7 states and 116 transitions. [2024-06-27 20:21:44,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 148 transitions, 1499 flow [2024-06-27 20:21:44,440 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 148 transitions, 1455 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-27 20:21:44,442 INFO L231 Difference]: Finished difference. Result has 127 places, 136 transitions, 1201 flow [2024-06-27 20:21:44,442 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1129, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1201, PETRI_PLACES=127, PETRI_TRANSITIONS=136} [2024-06-27 20:21:44,442 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 84 predicate places. [2024-06-27 20:21:44,442 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 136 transitions, 1201 flow [2024-06-27 20:21:44,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:21:44,442 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:21:44,443 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:21:44,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-27 20:21:44,443 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:21:44,443 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:21:44,443 INFO L85 PathProgramCache]: Analyzing trace with hash 1088241536, now seen corresponding path program 1 times [2024-06-27 20:21:44,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:21:44,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65956190] [2024-06-27 20:21:44,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:21:44,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:21:44,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:21:45,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:21:45,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:21:45,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65956190] [2024-06-27 20:21:45,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65956190] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:21:45,740 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:21:45,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:21:45,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812690498] [2024-06-27 20:21:45,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:21:45,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:21:45,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:21:45,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:21:45,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:21:45,848 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:21:45,848 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 136 transitions, 1201 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 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) [2024-06-27 20:21:45,848 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:21:45,848 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:21:45,848 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:21:46,659 INFO L124 PetriNetUnfolderBase]: 2619/4008 cut-off events. [2024-06-27 20:21:46,659 INFO L125 PetriNetUnfolderBase]: For 162455/162455 co-relation queries the response was YES. [2024-06-27 20:21:46,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26411 conditions, 4008 events. 2619/4008 cut-off events. For 162455/162455 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 20265 event pairs, 830 based on Foata normal form. 4/4009 useless extension candidates. Maximal degree in co-relation 26352. Up to 3818 conditions per place. [2024-06-27 20:21:46,687 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 152 selfloop transitions, 19 changer transitions 0/176 dead transitions. [2024-06-27 20:21:46,687 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 176 transitions, 1709 flow [2024-06-27 20:21:46,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:21:46,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:21:46,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-27 20:21:46,688 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4312169312169312 [2024-06-27 20:21:46,688 INFO L175 Difference]: Start difference. First operand has 127 places, 136 transitions, 1201 flow. Second operand 9 states and 163 transitions. [2024-06-27 20:21:46,688 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 176 transitions, 1709 flow [2024-06-27 20:21:46,790 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 176 transitions, 1659 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-27 20:21:46,792 INFO L231 Difference]: Finished difference. Result has 132 places, 141 transitions, 1282 flow [2024-06-27 20:21:46,792 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1151, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1282, PETRI_PLACES=132, PETRI_TRANSITIONS=141} [2024-06-27 20:21:46,792 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 89 predicate places. [2024-06-27 20:21:46,792 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 141 transitions, 1282 flow [2024-06-27 20:21:46,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 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) [2024-06-27 20:21:46,792 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:21:46,792 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:21:46,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-27 20:21:46,793 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:21:46,793 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:21:46,793 INFO L85 PathProgramCache]: Analyzing trace with hash 220603194, now seen corresponding path program 2 times [2024-06-27 20:21:46,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:21:46,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610840060] [2024-06-27 20:21:46,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:21:46,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:21:46,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:21:48,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:21:48,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:21:48,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610840060] [2024-06-27 20:21:48,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610840060] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:21:48,192 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:21:48,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:21:48,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329303594] [2024-06-27 20:21:48,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:21:48,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:21:48,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:21:48,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:21:48,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:21:48,361 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:21:48,361 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 141 transitions, 1282 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:21:48,361 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:21:48,361 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:21:48,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:21:49,012 INFO L124 PetriNetUnfolderBase]: 2658/4072 cut-off events. [2024-06-27 20:21:49,012 INFO L125 PetriNetUnfolderBase]: For 173286/173288 co-relation queries the response was YES. [2024-06-27 20:21:49,028 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27349 conditions, 4072 events. 2658/4072 cut-off events. For 173286/173288 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 20638 event pairs, 762 based on Foata normal form. 4/4075 useless extension candidates. Maximal degree in co-relation 27288. Up to 3677 conditions per place. [2024-06-27 20:21:49,041 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 134 selfloop transitions, 44 changer transitions 0/183 dead transitions. [2024-06-27 20:21:49,041 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 183 transitions, 1827 flow [2024-06-27 20:21:49,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:21:49,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:21:49,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-27 20:21:49,042 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-27 20:21:49,042 INFO L175 Difference]: Start difference. First operand has 132 places, 141 transitions, 1282 flow. Second operand 9 states and 171 transitions. [2024-06-27 20:21:49,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 183 transitions, 1827 flow [2024-06-27 20:21:49,135 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 183 transitions, 1740 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-27 20:21:49,137 INFO L231 Difference]: Finished difference. Result has 136 places, 147 transitions, 1387 flow [2024-06-27 20:21:49,137 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1195, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1387, PETRI_PLACES=136, PETRI_TRANSITIONS=147} [2024-06-27 20:21:49,137 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 93 predicate places. [2024-06-27 20:21:49,137 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 147 transitions, 1387 flow [2024-06-27 20:21:49,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:21:49,137 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:21:49,137 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:21:49,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-27 20:21:49,138 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:21:49,138 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:21:49,138 INFO L85 PathProgramCache]: Analyzing trace with hash -2080068594, now seen corresponding path program 3 times [2024-06-27 20:21:49,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:21:49,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349346176] [2024-06-27 20:21:49,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:21:49,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:21:49,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:21:50,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:21:50,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:21:50,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349346176] [2024-06-27 20:21:50,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349346176] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:21:50,428 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:21:50,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:21:50,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293183288] [2024-06-27 20:21:50,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:21:50,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:21:50,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:21:50,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:21:50,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:21:50,636 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:21:50,636 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 147 transitions, 1387 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:21:50,636 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:21:50,636 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:21:50,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:21:51,463 INFO L124 PetriNetUnfolderBase]: 2675/4099 cut-off events. [2024-06-27 20:21:51,464 INFO L125 PetriNetUnfolderBase]: For 185912/185914 co-relation queries the response was YES. [2024-06-27 20:21:51,480 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28214 conditions, 4099 events. 2675/4099 cut-off events. For 185912/185914 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 20768 event pairs, 727 based on Foata normal form. 4/4102 useless extension candidates. Maximal degree in co-relation 28151. Up to 3704 conditions per place. [2024-06-27 20:21:51,493 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 134 selfloop transitions, 47 changer transitions 0/186 dead transitions. [2024-06-27 20:21:51,493 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 186 transitions, 1930 flow [2024-06-27 20:21:51,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:21:51,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:21:51,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-27 20:21:51,494 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470899470899471 [2024-06-27 20:21:51,494 INFO L175 Difference]: Start difference. First operand has 136 places, 147 transitions, 1387 flow. Second operand 9 states and 169 transitions. [2024-06-27 20:21:51,494 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 186 transitions, 1930 flow [2024-06-27 20:21:51,656 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 186 transitions, 1783 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-27 20:21:51,658 INFO L231 Difference]: Finished difference. Result has 139 places, 151 transitions, 1424 flow [2024-06-27 20:21:51,659 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1244, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1424, PETRI_PLACES=139, PETRI_TRANSITIONS=151} [2024-06-27 20:21:51,659 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 96 predicate places. [2024-06-27 20:21:51,659 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 151 transitions, 1424 flow [2024-06-27 20:21:51,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:21:51,659 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:21:51,660 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:21:51,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-27 20:21:51,660 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:21:51,660 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:21:51,660 INFO L85 PathProgramCache]: Analyzing trace with hash -2080061154, now seen corresponding path program 4 times [2024-06-27 20:21:51,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:21:51,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194013073] [2024-06-27 20:21:51,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:21:51,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:21:51,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:21:53,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:21:53,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:21:53,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194013073] [2024-06-27 20:21:53,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194013073] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:21:53,017 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:21:53,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:21:53,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159595228] [2024-06-27 20:21:53,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:21:53,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:21:53,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:21:53,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:21:53,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:21:53,195 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:21:53,195 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 151 transitions, 1424 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:21:53,195 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:21:53,195 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:21:53,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:21:53,913 INFO L124 PetriNetUnfolderBase]: 2692/4126 cut-off events. [2024-06-27 20:21:53,913 INFO L125 PetriNetUnfolderBase]: For 196822/196824 co-relation queries the response was YES. [2024-06-27 20:21:53,929 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28719 conditions, 4126 events. 2692/4126 cut-off events. For 196822/196824 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 20953 event pairs, 738 based on Foata normal form. 4/4129 useless extension candidates. Maximal degree in co-relation 28655. Up to 3654 conditions per place. [2024-06-27 20:21:53,941 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 129 selfloop transitions, 54 changer transitions 0/188 dead transitions. [2024-06-27 20:21:53,941 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 188 transitions, 1954 flow [2024-06-27 20:21:53,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:21:53,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:21:53,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-27 20:21:53,942 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470899470899471 [2024-06-27 20:21:53,942 INFO L175 Difference]: Start difference. First operand has 139 places, 151 transitions, 1424 flow. Second operand 9 states and 169 transitions. [2024-06-27 20:21:53,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 188 transitions, 1954 flow [2024-06-27 20:21:54,064 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 188 transitions, 1821 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-27 20:21:54,066 INFO L231 Difference]: Finished difference. Result has 143 places, 153 transitions, 1474 flow [2024-06-27 20:21:54,066 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1291, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1474, PETRI_PLACES=143, PETRI_TRANSITIONS=153} [2024-06-27 20:21:54,067 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 100 predicate places. [2024-06-27 20:21:54,067 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 153 transitions, 1474 flow [2024-06-27 20:21:54,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:21:54,067 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:21:54,067 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:21:54,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-27 20:21:54,067 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:21:54,068 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:21:54,068 INFO L85 PathProgramCache]: Analyzing trace with hash -862746212, now seen corresponding path program 1 times [2024-06-27 20:21:54,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:21:54,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040170433] [2024-06-27 20:21:54,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:21:54,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:21:54,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:21:54,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:21:54,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:21:54,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040170433] [2024-06-27 20:21:54,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040170433] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:21:54,863 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:21:54,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:21:54,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588644525] [2024-06-27 20:21:54,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:21:54,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:21:54,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:21:54,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:21:54,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:21:54,950 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:21:54,950 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 153 transitions, 1474 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:21:54,950 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:21:54,950 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:21:54,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:21:55,496 INFO L124 PetriNetUnfolderBase]: 2662/4084 cut-off events. [2024-06-27 20:21:55,497 INFO L125 PetriNetUnfolderBase]: For 204508/204515 co-relation queries the response was YES. [2024-06-27 20:21:55,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28769 conditions, 4084 events. 2662/4084 cut-off events. For 204508/204515 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 20892 event pairs, 857 based on Foata normal form. 4/4073 useless extension candidates. Maximal degree in co-relation 28704. Up to 3926 conditions per place. [2024-06-27 20:21:55,529 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 136 selfloop transitions, 25 changer transitions 0/176 dead transitions. [2024-06-27 20:21:55,529 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 176 transitions, 1996 flow [2024-06-27 20:21:55,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:21:55,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:21:55,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-27 20:21:55,530 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42517006802721086 [2024-06-27 20:21:55,530 INFO L175 Difference]: Start difference. First operand has 143 places, 153 transitions, 1474 flow. Second operand 7 states and 125 transitions. [2024-06-27 20:21:55,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 176 transitions, 1996 flow [2024-06-27 20:21:55,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 176 transitions, 1831 flow, removed 30 selfloop flow, removed 7 redundant places. [2024-06-27 20:21:55,656 INFO L231 Difference]: Finished difference. Result has 143 places, 159 transitions, 1455 flow [2024-06-27 20:21:55,656 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1309, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1455, PETRI_PLACES=143, PETRI_TRANSITIONS=159} [2024-06-27 20:21:55,656 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 100 predicate places. [2024-06-27 20:21:55,656 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 159 transitions, 1455 flow [2024-06-27 20:21:55,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:21:55,656 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:21:55,657 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:21:55,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-27 20:21:55,657 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:21:55,657 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:21:55,657 INFO L85 PathProgramCache]: Analyzing trace with hash 619640048, now seen corresponding path program 5 times [2024-06-27 20:21:55,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:21:55,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594392692] [2024-06-27 20:21:55,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:21:55,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:21:55,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:21:56,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:21:56,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:21:56,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594392692] [2024-06-27 20:21:56,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594392692] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:21:56,975 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:21:56,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:21:56,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22621787] [2024-06-27 20:21:56,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:21:56,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:21:56,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:21:56,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:21:56,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:21:57,111 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:21:57,111 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 159 transitions, 1455 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:21:57,111 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:21:57,111 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:21:57,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:21:57,964 INFO L124 PetriNetUnfolderBase]: 2751/4221 cut-off events. [2024-06-27 20:21:57,964 INFO L125 PetriNetUnfolderBase]: For 218494/218494 co-relation queries the response was YES. [2024-06-27 20:21:57,981 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29956 conditions, 4221 events. 2751/4221 cut-off events. For 218494/218494 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 21642 event pairs, 1333 based on Foata normal form. 4/4224 useless extension candidates. Maximal degree in co-relation 29890. Up to 3933 conditions per place. [2024-06-27 20:21:57,995 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 158 selfloop transitions, 32 changer transitions 0/197 dead transitions. [2024-06-27 20:21:57,995 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 197 transitions, 2039 flow [2024-06-27 20:21:57,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:21:57,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:21:57,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 172 transitions. [2024-06-27 20:21:57,996 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4095238095238095 [2024-06-27 20:21:57,996 INFO L175 Difference]: Start difference. First operand has 143 places, 159 transitions, 1455 flow. Second operand 10 states and 172 transitions. [2024-06-27 20:21:57,996 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 197 transitions, 2039 flow [2024-06-27 20:21:58,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 197 transitions, 1987 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-27 20:21:58,156 INFO L231 Difference]: Finished difference. Result has 152 places, 167 transitions, 1619 flow [2024-06-27 20:21:58,156 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1404, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1619, PETRI_PLACES=152, PETRI_TRANSITIONS=167} [2024-06-27 20:21:58,157 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 109 predicate places. [2024-06-27 20:21:58,157 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 167 transitions, 1619 flow [2024-06-27 20:21:58,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:21:58,157 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:21:58,157 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:21:58,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-27 20:21:58,157 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:21:58,158 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:21:58,158 INFO L85 PathProgramCache]: Analyzing trace with hash -1876292178, now seen corresponding path program 6 times [2024-06-27 20:21:58,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:21:58,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826115273] [2024-06-27 20:21:58,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:21:58,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:21:58,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:21:59,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:21:59,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:21:59,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826115273] [2024-06-27 20:21:59,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826115273] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:21:59,438 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:21:59,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:21:59,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987472979] [2024-06-27 20:21:59,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:21:59,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:21:59,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:21:59,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:21:59,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:21:59,588 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:21:59,588 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 167 transitions, 1619 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:21:59,589 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:21:59,589 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:21:59,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:22:00,427 INFO L124 PetriNetUnfolderBase]: 2768/4248 cut-off events. [2024-06-27 20:22:00,427 INFO L125 PetriNetUnfolderBase]: For 233029/233029 co-relation queries the response was YES. [2024-06-27 20:22:00,447 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31000 conditions, 4248 events. 2768/4248 cut-off events. For 233029/233029 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 21819 event pairs, 1343 based on Foata normal form. 4/4251 useless extension candidates. Maximal degree in co-relation 30930. Up to 3960 conditions per place. [2024-06-27 20:22:00,462 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 162 selfloop transitions, 32 changer transitions 0/201 dead transitions. [2024-06-27 20:22:00,463 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 201 transitions, 2187 flow [2024-06-27 20:22:00,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:22:00,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:22:00,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-27 20:22:00,464 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4312169312169312 [2024-06-27 20:22:00,464 INFO L175 Difference]: Start difference. First operand has 152 places, 167 transitions, 1619 flow. Second operand 9 states and 163 transitions. [2024-06-27 20:22:00,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 201 transitions, 2187 flow [2024-06-27 20:22:00,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 201 transitions, 2044 flow, removed 41 selfloop flow, removed 6 redundant places. [2024-06-27 20:22:00,656 INFO L231 Difference]: Finished difference. Result has 155 places, 171 transitions, 1651 flow [2024-06-27 20:22:00,656 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1480, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1651, PETRI_PLACES=155, PETRI_TRANSITIONS=171} [2024-06-27 20:22:00,657 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 112 predicate places. [2024-06-27 20:22:00,657 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 171 transitions, 1651 flow [2024-06-27 20:22:00,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:22:00,657 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:22:00,657 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:22:00,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-27 20:22:00,658 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:22:00,658 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:22:00,658 INFO L85 PathProgramCache]: Analyzing trace with hash 2072187174, now seen corresponding path program 7 times [2024-06-27 20:22:00,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:22:00,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529077249] [2024-06-27 20:22:00,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:22:00,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:22:00,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:22:01,834 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:22:01,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:22:01,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529077249] [2024-06-27 20:22:01,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529077249] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:22:01,835 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:22:01,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:22:01,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372264597] [2024-06-27 20:22:01,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:22:01,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:22:01,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:22:01,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:22:01,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:22:01,964 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:22:01,965 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 171 transitions, 1651 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 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) [2024-06-27 20:22:01,965 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:22:01,965 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:22:01,965 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:22:02,721 INFO L124 PetriNetUnfolderBase]: 2785/4275 cut-off events. [2024-06-27 20:22:02,721 INFO L125 PetriNetUnfolderBase]: For 245127/245127 co-relation queries the response was YES. [2024-06-27 20:22:02,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31475 conditions, 4275 events. 2785/4275 cut-off events. For 245127/245127 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 22017 event pairs, 1343 based on Foata normal form. 4/4278 useless extension candidates. Maximal degree in co-relation 31404. Up to 3928 conditions per place. [2024-06-27 20:22:02,755 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 159 selfloop transitions, 37 changer transitions 0/203 dead transitions. [2024-06-27 20:22:02,755 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 203 transitions, 2199 flow [2024-06-27 20:22:02,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:22:02,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:22:02,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-27 20:22:02,756 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4312169312169312 [2024-06-27 20:22:02,756 INFO L175 Difference]: Start difference. First operand has 155 places, 171 transitions, 1651 flow. Second operand 9 states and 163 transitions. [2024-06-27 20:22:02,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 203 transitions, 2199 flow [2024-06-27 20:22:02,965 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 203 transitions, 2078 flow, removed 38 selfloop flow, removed 5 redundant places. [2024-06-27 20:22:02,967 INFO L231 Difference]: Finished difference. Result has 159 places, 173 transitions, 1693 flow [2024-06-27 20:22:02,967 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1530, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1693, PETRI_PLACES=159, PETRI_TRANSITIONS=173} [2024-06-27 20:22:02,967 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 116 predicate places. [2024-06-27 20:22:02,968 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 173 transitions, 1693 flow [2024-06-27 20:22:02,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 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) [2024-06-27 20:22:02,968 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:22:02,968 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:22:02,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-27 20:22:02,968 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:22:02,968 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:22:02,968 INFO L85 PathProgramCache]: Analyzing trace with hash -1046283326, now seen corresponding path program 8 times [2024-06-27 20:22:02,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:22:02,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800404412] [2024-06-27 20:22:02,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:22:02,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:22:02,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:22:04,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:22:04,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:22:04,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800404412] [2024-06-27 20:22:04,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800404412] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:22:04,115 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:22:04,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:22:04,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922036115] [2024-06-27 20:22:04,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:22:04,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:22:04,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:22:04,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:22:04,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:22:04,264 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:22:04,264 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 173 transitions, 1693 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 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) [2024-06-27 20:22:04,264 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:22:04,264 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:22:04,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:22:05,046 INFO L124 PetriNetUnfolderBase]: 2802/4302 cut-off events. [2024-06-27 20:22:05,046 INFO L125 PetriNetUnfolderBase]: For 257848/257848 co-relation queries the response was YES. [2024-06-27 20:22:05,067 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32032 conditions, 4302 events. 2802/4302 cut-off events. For 257848/257848 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 22152 event pairs, 1348 based on Foata normal form. 4/4305 useless extension candidates. Maximal degree in co-relation 31960. Up to 4091 conditions per place. [2024-06-27 20:22:05,084 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 177 selfloop transitions, 20 changer transitions 0/204 dead transitions. [2024-06-27 20:22:05,084 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 204 transitions, 2245 flow [2024-06-27 20:22:05,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:22:05,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:22:05,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-27 20:22:05,085 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41798941798941797 [2024-06-27 20:22:05,085 INFO L175 Difference]: Start difference. First operand has 159 places, 173 transitions, 1693 flow. Second operand 9 states and 158 transitions. [2024-06-27 20:22:05,085 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 204 transitions, 2245 flow [2024-06-27 20:22:05,306 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 204 transitions, 2100 flow, removed 37 selfloop flow, removed 7 redundant places. [2024-06-27 20:22:05,309 INFO L231 Difference]: Finished difference. Result has 161 places, 175 transitions, 1681 flow [2024-06-27 20:22:05,309 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1548, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1681, PETRI_PLACES=161, PETRI_TRANSITIONS=175} [2024-06-27 20:22:05,309 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 118 predicate places. [2024-06-27 20:22:05,309 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 175 transitions, 1681 flow [2024-06-27 20:22:05,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 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) [2024-06-27 20:22:05,310 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:22:05,310 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:22:05,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-27 20:22:05,310 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:22:05,310 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:22:05,311 INFO L85 PathProgramCache]: Analyzing trace with hash -899787264, now seen corresponding path program 9 times [2024-06-27 20:22:05,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:22:05,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151332125] [2024-06-27 20:22:05,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:22:05,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:22:05,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:22:06,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:22:06,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:22:06,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151332125] [2024-06-27 20:22:06,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151332125] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:22:06,418 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:22:06,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:22:06,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304487723] [2024-06-27 20:22:06,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:22:06,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:22:06,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:22:06,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:22:06,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:22:06,548 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:22:06,548 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 175 transitions, 1681 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 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) [2024-06-27 20:22:06,548 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:22:06,548 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:22:06,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:22:07,369 INFO L124 PetriNetUnfolderBase]: 2836/4356 cut-off events. [2024-06-27 20:22:07,369 INFO L125 PetriNetUnfolderBase]: For 271081/271081 co-relation queries the response was YES. [2024-06-27 20:22:07,387 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32540 conditions, 4356 events. 2836/4356 cut-off events. For 271081/271081 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 22531 event pairs, 1353 based on Foata normal form. 4/4359 useless extension candidates. Maximal degree in co-relation 32467. Up to 4104 conditions per place. [2024-06-27 20:22:07,400 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 178 selfloop transitions, 23 changer transitions 0/208 dead transitions. [2024-06-27 20:22:07,400 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 208 transitions, 2251 flow [2024-06-27 20:22:07,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:22:07,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:22:07,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-27 20:22:07,401 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-06-27 20:22:07,402 INFO L175 Difference]: Start difference. First operand has 161 places, 175 transitions, 1681 flow. Second operand 9 states and 159 transitions. [2024-06-27 20:22:07,402 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 208 transitions, 2251 flow [2024-06-27 20:22:07,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 208 transitions, 2142 flow, removed 39 selfloop flow, removed 5 redundant places. [2024-06-27 20:22:07,615 INFO L231 Difference]: Finished difference. Result has 166 places, 179 transitions, 1733 flow [2024-06-27 20:22:07,615 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1572, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1733, PETRI_PLACES=166, PETRI_TRANSITIONS=179} [2024-06-27 20:22:07,616 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 123 predicate places. [2024-06-27 20:22:07,616 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 179 transitions, 1733 flow [2024-06-27 20:22:07,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 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) [2024-06-27 20:22:07,616 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:22:07,617 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:22:07,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-27 20:22:07,617 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:22:07,617 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:22:07,617 INFO L85 PathProgramCache]: Analyzing trace with hash -643294194, now seen corresponding path program 10 times [2024-06-27 20:22:07,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:22:07,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703567871] [2024-06-27 20:22:07,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:22:07,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:22:07,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:22:08,915 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:22:08,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:22:08,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703567871] [2024-06-27 20:22:08,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703567871] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:22:08,916 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:22:08,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:22:08,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004373694] [2024-06-27 20:22:08,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:22:08,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:22:08,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:22:08,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:22:08,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:22:09,051 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:22:09,051 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 179 transitions, 1733 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:22:09,051 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:22:09,051 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:22:09,051 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:22:09,981 INFO L124 PetriNetUnfolderBase]: 2853/4383 cut-off events. [2024-06-27 20:22:09,981 INFO L125 PetriNetUnfolderBase]: For 284513/284513 co-relation queries the response was YES. [2024-06-27 20:22:10,004 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33140 conditions, 4383 events. 2853/4383 cut-off events. For 284513/284513 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 22706 event pairs, 1343 based on Foata normal form. 4/4386 useless extension candidates. Maximal degree in co-relation 33065. Up to 4127 conditions per place. [2024-06-27 20:22:10,022 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 173 selfloop transitions, 30 changer transitions 0/210 dead transitions. [2024-06-27 20:22:10,022 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 210 transitions, 2305 flow [2024-06-27 20:22:10,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:22:10,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:22:10,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-27 20:22:10,023 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-06-27 20:22:10,023 INFO L175 Difference]: Start difference. First operand has 166 places, 179 transitions, 1733 flow. Second operand 9 states and 159 transitions. [2024-06-27 20:22:10,024 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 210 transitions, 2305 flow [2024-06-27 20:22:10,259 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 210 transitions, 2186 flow, removed 41 selfloop flow, removed 6 redundant places. [2024-06-27 20:22:10,261 INFO L231 Difference]: Finished difference. Result has 169 places, 181 transitions, 1778 flow [2024-06-27 20:22:10,261 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1614, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1778, PETRI_PLACES=169, PETRI_TRANSITIONS=181} [2024-06-27 20:22:10,261 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 126 predicate places. [2024-06-27 20:22:10,262 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 181 transitions, 1778 flow [2024-06-27 20:22:10,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:22:10,262 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:22:10,262 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:22:10,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-27 20:22:10,262 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:22:10,262 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:22:10,262 INFO L85 PathProgramCache]: Analyzing trace with hash -643286754, now seen corresponding path program 11 times [2024-06-27 20:22:10,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:22:10,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078465113] [2024-06-27 20:22:10,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:22:10,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:22:10,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:22:11,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:22:11,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:22:11,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078465113] [2024-06-27 20:22:11,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078465113] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:22:11,486 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:22:11,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:22:11,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138881913] [2024-06-27 20:22:11,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:22:11,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:22:11,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:22:11,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:22:11,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:22:11,630 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:22:11,630 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 181 transitions, 1778 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:22:11,630 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:22:11,630 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:22:11,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:22:12,512 INFO L124 PetriNetUnfolderBase]: 2870/4410 cut-off events. [2024-06-27 20:22:12,512 INFO L125 PetriNetUnfolderBase]: For 298790/298790 co-relation queries the response was YES. [2024-06-27 20:22:12,537 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33720 conditions, 4410 events. 2870/4410 cut-off events. For 298790/298790 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 22880 event pairs, 1358 based on Foata normal form. 4/4413 useless extension candidates. Maximal degree in co-relation 33644. Up to 4072 conditions per place. [2024-06-27 20:22:12,554 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 169 selfloop transitions, 36 changer transitions 0/212 dead transitions. [2024-06-27 20:22:12,555 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 212 transitions, 2356 flow [2024-06-27 20:22:12,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:22:12,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:22:12,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-27 20:22:12,556 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42328042328042326 [2024-06-27 20:22:12,556 INFO L175 Difference]: Start difference. First operand has 169 places, 181 transitions, 1778 flow. Second operand 9 states and 160 transitions. [2024-06-27 20:22:12,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 212 transitions, 2356 flow [2024-06-27 20:22:12,844 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 212 transitions, 2208 flow, removed 47 selfloop flow, removed 7 redundant places. [2024-06-27 20:22:12,847 INFO L231 Difference]: Finished difference. Result has 171 places, 183 transitions, 1810 flow [2024-06-27 20:22:12,847 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1634, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1810, PETRI_PLACES=171, PETRI_TRANSITIONS=183} [2024-06-27 20:22:12,847 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 128 predicate places. [2024-06-27 20:22:12,847 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 183 transitions, 1810 flow [2024-06-27 20:22:12,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:22:12,848 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:22:12,848 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:22:12,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-27 20:22:12,848 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:22:12,848 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:22:12,848 INFO L85 PathProgramCache]: Analyzing trace with hash -634089984, now seen corresponding path program 12 times [2024-06-27 20:22:12,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:22:12,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179111667] [2024-06-27 20:22:12,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:22:12,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:22:12,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:22:14,022 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:22:14,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:22:14,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179111667] [2024-06-27 20:22:14,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179111667] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:22:14,023 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:22:14,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:22:14,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468838822] [2024-06-27 20:22:14,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:22:14,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:22:14,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:22:14,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:22:14,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:22:14,242 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:22:14,243 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 183 transitions, 1810 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:22:14,243 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:22:14,243 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:22:14,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:22:15,087 INFO L124 PetriNetUnfolderBase]: 2862/4398 cut-off events. [2024-06-27 20:22:15,087 INFO L125 PetriNetUnfolderBase]: For 292610/292610 co-relation queries the response was YES. [2024-06-27 20:22:15,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33232 conditions, 4398 events. 2862/4398 cut-off events. For 292610/292610 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 22706 event pairs, 1337 based on Foata normal form. 4/4401 useless extension candidates. Maximal degree in co-relation 33155. Up to 4173 conditions per place. [2024-06-27 20:22:15,121 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 187 selfloop transitions, 20 changer transitions 0/214 dead transitions. [2024-06-27 20:22:15,122 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 214 transitions, 2390 flow [2024-06-27 20:22:15,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:22:15,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:22:15,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-27 20:22:15,123 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41534391534391535 [2024-06-27 20:22:15,123 INFO L175 Difference]: Start difference. First operand has 171 places, 183 transitions, 1810 flow. Second operand 9 states and 157 transitions. [2024-06-27 20:22:15,123 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 214 transitions, 2390 flow [2024-06-27 20:22:15,374 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 214 transitions, 2230 flow, removed 47 selfloop flow, removed 7 redundant places. [2024-06-27 20:22:15,376 INFO L231 Difference]: Finished difference. Result has 173 places, 185 transitions, 1795 flow [2024-06-27 20:22:15,376 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1654, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1795, PETRI_PLACES=173, PETRI_TRANSITIONS=185} [2024-06-27 20:22:15,376 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 130 predicate places. [2024-06-27 20:22:15,376 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 185 transitions, 1795 flow [2024-06-27 20:22:15,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:22:15,377 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:22:15,377 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:22:15,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-27 20:22:15,377 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:22:15,377 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:22:15,377 INFO L85 PathProgramCache]: Analyzing trace with hash -508067462, now seen corresponding path program 2 times [2024-06-27 20:22:15,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:22:15,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815472299] [2024-06-27 20:22:15,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:22:15,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:22:15,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:22:16,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:22:16,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:22:16,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815472299] [2024-06-27 20:22:16,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815472299] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:22:16,025 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:22:16,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:22:16,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798055160] [2024-06-27 20:22:16,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:22:16,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:22:16,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:22:16,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:22:16,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:22:16,086 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:22:16,087 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 185 transitions, 1795 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:22:16,087 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:22:16,087 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:22:16,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:22:16,846 INFO L124 PetriNetUnfolderBase]: 2765/4255 cut-off events. [2024-06-27 20:22:16,846 INFO L125 PetriNetUnfolderBase]: For 288478/288501 co-relation queries the response was YES. [2024-06-27 20:22:16,867 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32167 conditions, 4255 events. 2765/4255 cut-off events. For 288478/288501 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 22242 event pairs, 1374 based on Foata normal form. 9/4217 useless extension candidates. Maximal degree in co-relation 32089. Up to 4126 conditions per place. [2024-06-27 20:22:16,882 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 166 selfloop transitions, 15 changer transitions 0/197 dead transitions. [2024-06-27 20:22:16,883 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 197 transitions, 2227 flow [2024-06-27 20:22:16,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:22:16,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:22:16,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 114 transitions. [2024-06-27 20:22:16,883 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3877551020408163 [2024-06-27 20:22:16,884 INFO L175 Difference]: Start difference. First operand has 173 places, 185 transitions, 1795 flow. Second operand 7 states and 114 transitions. [2024-06-27 20:22:16,884 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 197 transitions, 2227 flow [2024-06-27 20:22:17,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 197 transitions, 2104 flow, removed 43 selfloop flow, removed 7 redundant places. [2024-06-27 20:22:17,138 INFO L231 Difference]: Finished difference. Result has 173 places, 188 transitions, 1762 flow [2024-06-27 20:22:17,138 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1672, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1762, PETRI_PLACES=173, PETRI_TRANSITIONS=188} [2024-06-27 20:22:17,139 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 130 predicate places. [2024-06-27 20:22:17,139 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 188 transitions, 1762 flow [2024-06-27 20:22:17,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:22:17,139 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:22:17,139 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:22:17,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-27 20:22:17,139 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:22:17,139 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:22:17,140 INFO L85 PathProgramCache]: Analyzing trace with hash 348607420, now seen corresponding path program 3 times [2024-06-27 20:22:17,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:22:17,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894340728] [2024-06-27 20:22:17,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:22:17,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:22:17,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:22:17,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:22:17,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:22:17,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894340728] [2024-06-27 20:22:17,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894340728] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:22:17,866 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:22:17,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:22:17,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712744991] [2024-06-27 20:22:17,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:22:17,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:22:17,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:22:17,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:22:17,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:22:17,922 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:22:17,922 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 188 transitions, 1762 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:22:17,922 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:22:17,922 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:22:17,922 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:22:18,618 INFO L124 PetriNetUnfolderBase]: 2761/4244 cut-off events. [2024-06-27 20:22:18,618 INFO L125 PetriNetUnfolderBase]: For 294867/294890 co-relation queries the response was YES. [2024-06-27 20:22:18,641 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31980 conditions, 4244 events. 2761/4244 cut-off events. For 294867/294890 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 22170 event pairs, 1373 based on Foata normal form. 8/4199 useless extension candidates. Maximal degree in co-relation 31901. Up to 4115 conditions per place. [2024-06-27 20:22:18,655 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 161 selfloop transitions, 20 changer transitions 0/197 dead transitions. [2024-06-27 20:22:18,656 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 197 transitions, 2146 flow [2024-06-27 20:22:18,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:22:18,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:22:18,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-27 20:22:18,656 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3945578231292517 [2024-06-27 20:22:18,657 INFO L175 Difference]: Start difference. First operand has 173 places, 188 transitions, 1762 flow. Second operand 7 states and 116 transitions. [2024-06-27 20:22:18,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 197 transitions, 2146 flow [2024-06-27 20:22:18,900 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 197 transitions, 2060 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-06-27 20:22:18,903 INFO L231 Difference]: Finished difference. Result has 175 places, 188 transitions, 1722 flow [2024-06-27 20:22:18,903 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1676, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1722, PETRI_PLACES=175, PETRI_TRANSITIONS=188} [2024-06-27 20:22:18,903 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 132 predicate places. [2024-06-27 20:22:18,903 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 188 transitions, 1722 flow [2024-06-27 20:22:18,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:22:18,904 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:22:18,904 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:22:18,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-27 20:22:18,904 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:22:18,904 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:22:18,904 INFO L85 PathProgramCache]: Analyzing trace with hash 1073817028, now seen corresponding path program 1 times [2024-06-27 20:22:18,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:22:18,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676199323] [2024-06-27 20:22:18,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:22:18,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:22:18,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:22:19,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:22:19,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:22:19,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676199323] [2024-06-27 20:22:19,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676199323] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:22:19,570 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:22:19,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:22:19,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940532118] [2024-06-27 20:22:19,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:22:19,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:22:19,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:22:19,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:22:19,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:22:19,646 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:22:19,646 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 188 transitions, 1722 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:22:19,646 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:22:19,646 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:22:19,647 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:22:20,571 INFO L124 PetriNetUnfolderBase]: 2876/4418 cut-off events. [2024-06-27 20:22:20,571 INFO L125 PetriNetUnfolderBase]: For 306505/306505 co-relation queries the response was YES. [2024-06-27 20:22:20,595 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33111 conditions, 4418 events. 2876/4418 cut-off events. For 306505/306505 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 22890 event pairs, 1366 based on Foata normal form. 2/4419 useless extension candidates. Maximal degree in co-relation 33031. Up to 4247 conditions per place. [2024-06-27 20:22:20,612 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 182 selfloop transitions, 17 changer transitions 0/207 dead transitions. [2024-06-27 20:22:20,612 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 207 transitions, 2202 flow [2024-06-27 20:22:20,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:22:20,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:22:20,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-27 20:22:20,613 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41496598639455784 [2024-06-27 20:22:20,613 INFO L175 Difference]: Start difference. First operand has 175 places, 188 transitions, 1722 flow. Second operand 7 states and 122 transitions. [2024-06-27 20:22:20,614 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 207 transitions, 2202 flow [2024-06-27 20:22:20,992 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 207 transitions, 2131 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-27 20:22:20,995 INFO L231 Difference]: Finished difference. Result has 176 places, 191 transitions, 1738 flow [2024-06-27 20:22:20,995 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1651, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1738, PETRI_PLACES=176, PETRI_TRANSITIONS=191} [2024-06-27 20:22:20,996 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 133 predicate places. [2024-06-27 20:22:20,996 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 191 transitions, 1738 flow [2024-06-27 20:22:20,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:22:20,996 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:22:20,996 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:22:20,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-27 20:22:20,997 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:22:20,997 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:22:20,997 INFO L85 PathProgramCache]: Analyzing trace with hash -685430366, now seen corresponding path program 2 times [2024-06-27 20:22:20,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:22:20,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634613008] [2024-06-27 20:22:20,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:22:20,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:22:21,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:22:21,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:22:21,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:22:21,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634613008] [2024-06-27 20:22:21,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634613008] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:22:21,641 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:22:21,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:22:21,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757420239] [2024-06-27 20:22:21,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:22:21,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:22:21,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:22:21,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:22:21,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:22:21,713 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:22:21,713 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 191 transitions, 1738 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:22:21,713 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:22:21,713 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:22:21,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:22:22,604 INFO L124 PetriNetUnfolderBase]: 2886/4432 cut-off events. [2024-06-27 20:22:22,604 INFO L125 PetriNetUnfolderBase]: For 318463/318463 co-relation queries the response was YES. [2024-06-27 20:22:22,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33801 conditions, 4432 events. 2886/4432 cut-off events. For 318463/318463 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 22965 event pairs, 1367 based on Foata normal form. 2/4433 useless extension candidates. Maximal degree in co-relation 33720. Up to 4237 conditions per place. [2024-06-27 20:22:22,639 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 176 selfloop transitions, 29 changer transitions 0/213 dead transitions. [2024-06-27 20:22:22,639 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 213 transitions, 2378 flow [2024-06-27 20:22:22,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:22:22,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:22:22,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-27 20:22:22,640 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42517006802721086 [2024-06-27 20:22:22,640 INFO L175 Difference]: Start difference. First operand has 176 places, 191 transitions, 1738 flow. Second operand 7 states and 125 transitions. [2024-06-27 20:22:22,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 213 transitions, 2378 flow [2024-06-27 20:22:22,893 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 213 transitions, 2315 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-27 20:22:22,895 INFO L231 Difference]: Finished difference. Result has 178 places, 197 transitions, 1837 flow [2024-06-27 20:22:22,896 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1675, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1837, PETRI_PLACES=178, PETRI_TRANSITIONS=197} [2024-06-27 20:22:22,896 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 135 predicate places. [2024-06-27 20:22:22,896 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 197 transitions, 1837 flow [2024-06-27 20:22:22,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:22:22,896 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:22:22,896 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:22:22,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-27 20:22:22,896 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:22:22,897 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:22:22,897 INFO L85 PathProgramCache]: Analyzing trace with hash 1073937184, now seen corresponding path program 1 times [2024-06-27 20:22:22,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:22:22,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115343052] [2024-06-27 20:22:22,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:22:22,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:22:22,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:22:23,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:22:23,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:22:23,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115343052] [2024-06-27 20:22:23,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115343052] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:22:23,541 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:22:23,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:22:23,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021236172] [2024-06-27 20:22:23,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:22:23,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:22:23,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:22:23,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:22:23,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:22:23,618 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:22:23,618 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 197 transitions, 1837 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 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) [2024-06-27 20:22:23,618 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:22:23,618 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:22:23,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:22:24,513 INFO L124 PetriNetUnfolderBase]: 3013/4561 cut-off events. [2024-06-27 20:22:24,513 INFO L125 PetriNetUnfolderBase]: For 330674/330674 co-relation queries the response was YES. [2024-06-27 20:22:24,534 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35116 conditions, 4561 events. 3013/4561 cut-off events. For 330674/330674 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 23142 event pairs, 1426 based on Foata normal form. 1/4561 useless extension candidates. Maximal degree in co-relation 35034. Up to 4506 conditions per place. [2024-06-27 20:22:24,548 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 189 selfloop transitions, 24 changer transitions 0/216 dead transitions. [2024-06-27 20:22:24,548 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 216 transitions, 2471 flow [2024-06-27 20:22:24,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:22:24,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:22:24,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-27 20:22:24,549 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3945578231292517 [2024-06-27 20:22:24,549 INFO L175 Difference]: Start difference. First operand has 178 places, 197 transitions, 1837 flow. Second operand 7 states and 116 transitions. [2024-06-27 20:22:24,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 216 transitions, 2471 flow [2024-06-27 20:22:24,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 216 transitions, 2409 flow, removed 22 selfloop flow, removed 3 redundant places. [2024-06-27 20:22:24,862 INFO L231 Difference]: Finished difference. Result has 182 places, 203 transitions, 1915 flow [2024-06-27 20:22:24,863 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1775, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1915, PETRI_PLACES=182, PETRI_TRANSITIONS=203} [2024-06-27 20:22:24,863 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 139 predicate places. [2024-06-27 20:22:24,863 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 203 transitions, 1915 flow [2024-06-27 20:22:24,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 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) [2024-06-27 20:22:24,863 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:22:24,863 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:22:24,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-27 20:22:24,863 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:22:24,863 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:22:24,864 INFO L85 PathProgramCache]: Analyzing trace with hash 819794152, now seen corresponding path program 2 times [2024-06-27 20:22:24,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:22:24,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565734683] [2024-06-27 20:22:24,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:22:24,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:22:24,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:22:25,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:22:25,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:22:25,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565734683] [2024-06-27 20:22:25,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565734683] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:22:25,502 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:22:25,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:22:25,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551993652] [2024-06-27 20:22:25,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:22:25,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:22:25,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:22:25,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:22:25,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:22:25,555 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:22:25,556 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 203 transitions, 1915 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 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) [2024-06-27 20:22:25,556 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:22:25,556 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:22:25,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:22:26,435 INFO L124 PetriNetUnfolderBase]: 3018/4569 cut-off events. [2024-06-27 20:22:26,435 INFO L125 PetriNetUnfolderBase]: For 344647/344649 co-relation queries the response was YES. [2024-06-27 20:22:26,551 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35793 conditions, 4569 events. 3018/4569 cut-off events. For 344647/344649 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 23201 event pairs, 1428 based on Foata normal form. 3/4571 useless extension candidates. Maximal degree in co-relation 35709. Up to 4512 conditions per place. [2024-06-27 20:22:26,563 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 185 selfloop transitions, 28 changer transitions 0/216 dead transitions. [2024-06-27 20:22:26,564 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 216 transitions, 2509 flow [2024-06-27 20:22:26,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:22:26,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:22:26,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 112 transitions. [2024-06-27 20:22:26,565 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-27 20:22:26,565 INFO L175 Difference]: Start difference. First operand has 182 places, 203 transitions, 1915 flow. Second operand 7 states and 112 transitions. [2024-06-27 20:22:26,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 216 transitions, 2509 flow [2024-06-27 20:22:26,814 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 216 transitions, 2436 flow, removed 29 selfloop flow, removed 3 redundant places. [2024-06-27 20:22:26,816 INFO L231 Difference]: Finished difference. Result has 186 places, 206 transitions, 1950 flow [2024-06-27 20:22:26,816 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1854, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1950, PETRI_PLACES=186, PETRI_TRANSITIONS=206} [2024-06-27 20:22:26,817 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 143 predicate places. [2024-06-27 20:22:26,817 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 206 transitions, 1950 flow [2024-06-27 20:22:26,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 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) [2024-06-27 20:22:26,817 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:22:26,817 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:22:26,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-27 20:22:26,817 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:22:26,818 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:22:26,818 INFO L85 PathProgramCache]: Analyzing trace with hash 1521868894, now seen corresponding path program 3 times [2024-06-27 20:22:26,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:22:26,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862333808] [2024-06-27 20:22:26,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:22:26,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:22:26,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:22:27,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:22:27,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:22:27,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862333808] [2024-06-27 20:22:27,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862333808] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:22:27,456 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:22:27,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:22:27,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499044943] [2024-06-27 20:22:27,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:22:27,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:22:27,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:22:27,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:22:27,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:22:27,524 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:22:27,524 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 206 transitions, 1950 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 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) [2024-06-27 20:22:27,524 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:22:27,524 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:22:27,524 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:22:28,368 INFO L124 PetriNetUnfolderBase]: 3015/4565 cut-off events. [2024-06-27 20:22:28,368 INFO L125 PetriNetUnfolderBase]: For 355569/355571 co-relation queries the response was YES. [2024-06-27 20:22:28,393 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35973 conditions, 4565 events. 3015/4565 cut-off events. For 355569/355571 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 23173 event pairs, 1428 based on Foata normal form. 3/4567 useless extension candidates. Maximal degree in co-relation 35887. Up to 4509 conditions per place. [2024-06-27 20:22:28,409 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 185 selfloop transitions, 27 changer transitions 0/215 dead transitions. [2024-06-27 20:22:28,409 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 215 transitions, 2396 flow [2024-06-27 20:22:28,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:22:28,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:22:28,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 112 transitions. [2024-06-27 20:22:28,410 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-27 20:22:28,410 INFO L175 Difference]: Start difference. First operand has 186 places, 206 transitions, 1950 flow. Second operand 7 states and 112 transitions. [2024-06-27 20:22:28,410 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 215 transitions, 2396 flow [2024-06-27 20:22:28,733 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 215 transitions, 2312 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-27 20:22:28,736 INFO L231 Difference]: Finished difference. Result has 189 places, 206 transitions, 1926 flow [2024-06-27 20:22:28,736 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1866, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1926, PETRI_PLACES=189, PETRI_TRANSITIONS=206} [2024-06-27 20:22:28,736 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 146 predicate places. [2024-06-27 20:22:28,736 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 206 transitions, 1926 flow [2024-06-27 20:22:28,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 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) [2024-06-27 20:22:28,737 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:22:28,737 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:22:28,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-27 20:22:28,737 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:22:28,737 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:22:28,737 INFO L85 PathProgramCache]: Analyzing trace with hash -508298846, now seen corresponding path program 3 times [2024-06-27 20:22:28,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:22:28,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974365351] [2024-06-27 20:22:28,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:22:28,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:22:28,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:22:29,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:22:29,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:22:29,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974365351] [2024-06-27 20:22:29,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974365351] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:22:29,378 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:22:29,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:22:29,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664848086] [2024-06-27 20:22:29,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:22:29,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:22:29,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:22:29,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:22:29,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:22:29,451 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:22:29,451 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 206 transitions, 1926 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:22:29,451 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:22:29,451 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:22:29,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:22:30,293 INFO L124 PetriNetUnfolderBase]: 2899/4447 cut-off events. [2024-06-27 20:22:30,293 INFO L125 PetriNetUnfolderBase]: For 367916/367918 co-relation queries the response was YES. [2024-06-27 20:22:30,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35458 conditions, 4447 events. 2899/4447 cut-off events. For 367916/367918 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 23026 event pairs, 1367 based on Foata normal form. 2/4448 useless extension candidates. Maximal degree in co-relation 35371. Up to 4251 conditions per place. [2024-06-27 20:22:30,334 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 177 selfloop transitions, 29 changer transitions 0/217 dead transitions. [2024-06-27 20:22:30,334 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 217 transitions, 2368 flow [2024-06-27 20:22:30,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:22:30,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:22:30,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-27 20:22:30,335 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41156462585034015 [2024-06-27 20:22:30,335 INFO L175 Difference]: Start difference. First operand has 189 places, 206 transitions, 1926 flow. Second operand 7 states and 121 transitions. [2024-06-27 20:22:30,335 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 217 transitions, 2368 flow [2024-06-27 20:22:30,728 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 217 transitions, 2270 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-27 20:22:30,731 INFO L231 Difference]: Finished difference. Result has 189 places, 206 transitions, 1892 flow [2024-06-27 20:22:30,731 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1828, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1892, PETRI_PLACES=189, PETRI_TRANSITIONS=206} [2024-06-27 20:22:30,731 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 146 predicate places. [2024-06-27 20:22:30,731 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 206 transitions, 1892 flow [2024-06-27 20:22:30,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:22:30,732 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:22:30,732 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:22:30,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-27 20:22:30,732 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:22:30,733 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:22:30,733 INFO L85 PathProgramCache]: Analyzing trace with hash 1811364307, now seen corresponding path program 1 times [2024-06-27 20:22:30,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:22:30,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056268625] [2024-06-27 20:22:30,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:22:30,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:22:30,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:22:31,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:22:31,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:22:31,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056268625] [2024-06-27 20:22:31,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056268625] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:22:31,428 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:22:31,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:22:31,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125396646] [2024-06-27 20:22:31,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:22:31,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:22:31,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:22:31,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:22:31,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:22:31,516 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:22:31,517 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 206 transitions, 1892 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 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) [2024-06-27 20:22:31,517 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:22:31,517 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:22:31,517 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:22:32,407 INFO L124 PetriNetUnfolderBase]: 2932/4488 cut-off events. [2024-06-27 20:22:32,407 INFO L125 PetriNetUnfolderBase]: For 378724/378728 co-relation queries the response was YES. [2024-06-27 20:22:32,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35953 conditions, 4488 events. 2932/4488 cut-off events. For 378724/378728 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 23172 event pairs, 817 based on Foata normal form. 5/4492 useless extension candidates. Maximal degree in co-relation 35865. Up to 4262 conditions per place. [2024-06-27 20:22:32,451 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 205 selfloop transitions, 37 changer transitions 0/253 dead transitions. [2024-06-27 20:22:32,451 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 253 transitions, 2749 flow [2024-06-27 20:22:32,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:22:32,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:22:32,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-27 20:22:32,452 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2024-06-27 20:22:32,452 INFO L175 Difference]: Start difference. First operand has 189 places, 206 transitions, 1892 flow. Second operand 8 states and 150 transitions. [2024-06-27 20:22:32,452 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 253 transitions, 2749 flow [2024-06-27 20:22:32,821 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 253 transitions, 2667 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-27 20:22:32,823 INFO L231 Difference]: Finished difference. Result has 194 places, 226 transitions, 2124 flow [2024-06-27 20:22:32,824 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1810, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2124, PETRI_PLACES=194, PETRI_TRANSITIONS=226} [2024-06-27 20:22:32,824 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 151 predicate places. [2024-06-27 20:22:32,824 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 226 transitions, 2124 flow [2024-06-27 20:22:32,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 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) [2024-06-27 20:22:32,824 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:22:32,824 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:22:32,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-27 20:22:32,824 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:22:32,825 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:22:32,825 INFO L85 PathProgramCache]: Analyzing trace with hash 2033940059, now seen corresponding path program 2 times [2024-06-27 20:22:32,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:22:32,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691671152] [2024-06-27 20:22:32,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:22:32,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:22:32,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:22:33,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:22:33,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:22:33,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691671152] [2024-06-27 20:22:33,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691671152] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:22:33,750 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:22:33,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:22:33,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273590135] [2024-06-27 20:22:33,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:22:33,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:22:33,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:22:33,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:22:33,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:22:33,864 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:22:33,868 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 226 transitions, 2124 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 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) [2024-06-27 20:22:33,868 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:22:33,868 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:22:33,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:22:34,813 INFO L124 PetriNetUnfolderBase]: 3021/4624 cut-off events. [2024-06-27 20:22:34,813 INFO L125 PetriNetUnfolderBase]: For 398096/398100 co-relation queries the response was YES. [2024-06-27 20:22:34,841 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37909 conditions, 4624 events. 3021/4624 cut-off events. For 398096/398100 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 23931 event pairs, 1053 based on Foata normal form. 5/4628 useless extension candidates. Maximal degree in co-relation 37817. Up to 4371 conditions per place. [2024-06-27 20:22:34,858 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 222 selfloop transitions, 61 changer transitions 0/294 dead transitions. [2024-06-27 20:22:34,858 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 294 transitions, 3370 flow [2024-06-27 20:22:34,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:22:34,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:22:34,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-27 20:22:34,859 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43915343915343913 [2024-06-27 20:22:34,859 INFO L175 Difference]: Start difference. First operand has 194 places, 226 transitions, 2124 flow. Second operand 9 states and 166 transitions. [2024-06-27 20:22:34,859 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 294 transitions, 3370 flow [2024-06-27 20:22:35,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 294 transitions, 3235 flow, removed 63 selfloop flow, removed 2 redundant places. [2024-06-27 20:22:35,331 INFO L231 Difference]: Finished difference. Result has 204 places, 263 transitions, 2651 flow [2024-06-27 20:22:35,331 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2069, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2651, PETRI_PLACES=204, PETRI_TRANSITIONS=263} [2024-06-27 20:22:35,331 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 161 predicate places. [2024-06-27 20:22:35,331 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 263 transitions, 2651 flow [2024-06-27 20:22:35,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 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) [2024-06-27 20:22:35,332 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:22:35,332 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:22:35,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-27 20:22:35,332 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:22:35,332 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:22:35,333 INFO L85 PathProgramCache]: Analyzing trace with hash -387772065, now seen corresponding path program 1 times [2024-06-27 20:22:35,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:22:35,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786668655] [2024-06-27 20:22:35,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:22:35,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:22:35,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:22:36,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:22:36,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:22:36,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786668655] [2024-06-27 20:22:36,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786668655] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:22:36,742 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:22:36,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:22:36,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395725529] [2024-06-27 20:22:36,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:22:36,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:22:36,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:22:36,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:22:36,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:22:37,041 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:22:37,042 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 263 transitions, 2651 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:22:37,042 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:22:37,042 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:22:37,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:22:38,395 INFO L124 PetriNetUnfolderBase]: 3133/4806 cut-off events. [2024-06-27 20:22:38,395 INFO L125 PetriNetUnfolderBase]: For 427624/427626 co-relation queries the response was YES. [2024-06-27 20:22:38,421 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39585 conditions, 4806 events. 3133/4806 cut-off events. For 427624/427626 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 25232 event pairs, 1144 based on Foata normal form. 14/4819 useless extension candidates. Maximal degree in co-relation 39488. Up to 4446 conditions per place. [2024-06-27 20:22:38,437 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 276 selfloop transitions, 44 changer transitions 0/331 dead transitions. [2024-06-27 20:22:38,437 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 331 transitions, 3663 flow [2024-06-27 20:22:38,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 20:22:38,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 20:22:38,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 231 transitions. [2024-06-27 20:22:38,439 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4230769230769231 [2024-06-27 20:22:38,439 INFO L175 Difference]: Start difference. First operand has 204 places, 263 transitions, 2651 flow. Second operand 13 states and 231 transitions. [2024-06-27 20:22:38,439 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 331 transitions, 3663 flow [2024-06-27 20:22:38,831 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 331 transitions, 3602 flow, removed 26 selfloop flow, removed 2 redundant places. [2024-06-27 20:22:38,835 INFO L231 Difference]: Finished difference. Result has 219 places, 280 transitions, 2916 flow [2024-06-27 20:22:38,836 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2590, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=263, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=2916, PETRI_PLACES=219, PETRI_TRANSITIONS=280} [2024-06-27 20:22:38,836 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 176 predicate places. [2024-06-27 20:22:38,836 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 280 transitions, 2916 flow [2024-06-27 20:22:38,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:22:38,836 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:22:38,837 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:22:38,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-27 20:22:38,837 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:22:38,837 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:22:38,837 INFO L85 PathProgramCache]: Analyzing trace with hash -696809843, now seen corresponding path program 2 times [2024-06-27 20:22:38,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:22:38,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378026507] [2024-06-27 20:22:38,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:22:38,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:22:38,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:22:40,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:22:40,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:22:40,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378026507] [2024-06-27 20:22:40,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378026507] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:22:40,144 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:22:40,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:22:40,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107245741] [2024-06-27 20:22:40,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:22:40,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:22:40,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:22:40,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:22:40,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:22:40,385 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:22:40,385 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 280 transitions, 2916 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:22:40,385 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:22:40,385 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:22:40,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:22:41,703 INFO L124 PetriNetUnfolderBase]: 3304/5073 cut-off events. [2024-06-27 20:22:41,703 INFO L125 PetriNetUnfolderBase]: For 453541/453543 co-relation queries the response was YES. [2024-06-27 20:22:41,737 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42218 conditions, 5073 events. 3304/5073 cut-off events. For 453541/453543 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 26979 event pairs, 1072 based on Foata normal form. 14/5086 useless extension candidates. Maximal degree in co-relation 42115. Up to 4682 conditions per place. [2024-06-27 20:22:41,757 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 286 selfloop transitions, 50 changer transitions 0/347 dead transitions. [2024-06-27 20:22:41,757 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 347 transitions, 4136 flow [2024-06-27 20:22:41,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:22:41,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:22:41,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 197 transitions. [2024-06-27 20:22:41,758 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4264069264069264 [2024-06-27 20:22:41,758 INFO L175 Difference]: Start difference. First operand has 219 places, 280 transitions, 2916 flow. Second operand 11 states and 197 transitions. [2024-06-27 20:22:41,758 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 347 transitions, 4136 flow [2024-06-27 20:22:42,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 347 transitions, 3940 flow, removed 60 selfloop flow, removed 5 redundant places. [2024-06-27 20:22:42,282 INFO L231 Difference]: Finished difference. Result has 228 places, 306 transitions, 3302 flow [2024-06-27 20:22:42,283 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2804, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=280, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3302, PETRI_PLACES=228, PETRI_TRANSITIONS=306} [2024-06-27 20:22:42,283 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 185 predicate places. [2024-06-27 20:22:42,283 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 306 transitions, 3302 flow [2024-06-27 20:22:42,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:22:42,284 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:22:42,284 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:22:42,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-27 20:22:42,284 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:22:42,284 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:22:42,285 INFO L85 PathProgramCache]: Analyzing trace with hash 816674535, now seen corresponding path program 1 times [2024-06-27 20:22:42,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:22:42,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236226227] [2024-06-27 20:22:42,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:22:42,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:22:42,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:22:42,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:22:42,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:22:42,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236226227] [2024-06-27 20:22:42,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236226227] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:22:42,899 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:22:42,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:22:42,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660266886] [2024-06-27 20:22:42,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:22:42,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:22:42,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:22:42,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:22:42,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:22:42,971 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:22:42,971 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 306 transitions, 3302 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:22:42,971 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:22:42,971 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:22:42,971 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:22:44,072 INFO L124 PetriNetUnfolderBase]: 3350/5146 cut-off events. [2024-06-27 20:22:44,073 INFO L125 PetriNetUnfolderBase]: For 451675/451679 co-relation queries the response was YES. [2024-06-27 20:22:44,105 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42602 conditions, 5146 events. 3350/5146 cut-off events. For 451675/451679 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 27500 event pairs, 1278 based on Foata normal form. 5/5150 useless extension candidates. Maximal degree in co-relation 42495. Up to 4888 conditions per place. [2024-06-27 20:22:44,123 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 292 selfloop transitions, 49 changer transitions 0/352 dead transitions. [2024-06-27 20:22:44,123 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 352 transitions, 4671 flow [2024-06-27 20:22:44,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:22:44,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:22:44,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-27 20:22:44,124 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2024-06-27 20:22:44,124 INFO L175 Difference]: Start difference. First operand has 228 places, 306 transitions, 3302 flow. Second operand 8 states and 150 transitions. [2024-06-27 20:22:44,124 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 352 transitions, 4671 flow [2024-06-27 20:22:44,660 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 352 transitions, 4579 flow, removed 26 selfloop flow, removed 3 redundant places. [2024-06-27 20:22:44,664 INFO L231 Difference]: Finished difference. Result has 235 places, 326 transitions, 3601 flow [2024-06-27 20:22:44,664 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3210, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=306, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3601, PETRI_PLACES=235, PETRI_TRANSITIONS=326} [2024-06-27 20:22:44,664 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 192 predicate places. [2024-06-27 20:22:44,664 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 326 transitions, 3601 flow [2024-06-27 20:22:44,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:22:44,665 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:22:44,665 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:22:44,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-27 20:22:44,665 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:22:44,665 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:22:44,665 INFO L85 PathProgramCache]: Analyzing trace with hash -1571145169, now seen corresponding path program 3 times [2024-06-27 20:22:44,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:22:44,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978062279] [2024-06-27 20:22:44,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:22:44,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:22:44,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:22:45,920 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:22:45,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:22:45,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978062279] [2024-06-27 20:22:45,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978062279] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:22:45,920 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:22:45,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:22:45,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087318202] [2024-06-27 20:22:45,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:22:45,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:22:45,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:22:45,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:22:45,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:22:46,121 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:22:46,121 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 326 transitions, 3601 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:22:46,121 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:22:46,121 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:22:46,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:22:47,560 INFO L124 PetriNetUnfolderBase]: 3625/5581 cut-off events. [2024-06-27 20:22:47,560 INFO L125 PetriNetUnfolderBase]: For 482563/482569 co-relation queries the response was YES. [2024-06-27 20:22:47,599 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45592 conditions, 5581 events. 3625/5581 cut-off events. For 482563/482569 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 30337 event pairs, 1062 based on Foata normal form. 16/5596 useless extension candidates. Maximal degree in co-relation 45482. Up to 4719 conditions per place. [2024-06-27 20:22:47,620 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 272 selfloop transitions, 144 changer transitions 0/427 dead transitions. [2024-06-27 20:22:47,620 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 427 transitions, 5203 flow [2024-06-27 20:22:47,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:22:47,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:22:47,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 210 transitions. [2024-06-27 20:22:47,621 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-27 20:22:47,621 INFO L175 Difference]: Start difference. First operand has 235 places, 326 transitions, 3601 flow. Second operand 11 states and 210 transitions. [2024-06-27 20:22:47,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 427 transitions, 5203 flow [2024-06-27 20:22:48,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 427 transitions, 5066 flow, removed 54 selfloop flow, removed 3 redundant places. [2024-06-27 20:22:48,246 INFO L231 Difference]: Finished difference. Result has 247 places, 375 transitions, 4380 flow [2024-06-27 20:22:48,246 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3464, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=326, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4380, PETRI_PLACES=247, PETRI_TRANSITIONS=375} [2024-06-27 20:22:48,247 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 204 predicate places. [2024-06-27 20:22:48,247 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 375 transitions, 4380 flow [2024-06-27 20:22:48,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:22:48,247 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:22:48,247 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:22:48,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-27 20:22:48,247 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:22:48,247 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:22:48,247 INFO L85 PathProgramCache]: Analyzing trace with hash 168918877, now seen corresponding path program 4 times [2024-06-27 20:22:48,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:22:48,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733623566] [2024-06-27 20:22:48,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:22:48,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:22:48,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:22:49,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:22:49,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:22:49,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733623566] [2024-06-27 20:22:49,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733623566] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:22:49,503 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:22:49,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:22:49,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892774398] [2024-06-27 20:22:49,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:22:49,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:22:49,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:22:49,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:22:49,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:22:49,725 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:22:49,725 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 375 transitions, 4380 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:22:49,725 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:22:49,725 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:22:49,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:22:51,184 INFO L124 PetriNetUnfolderBase]: 3683/5677 cut-off events. [2024-06-27 20:22:51,184 INFO L125 PetriNetUnfolderBase]: For 504553/504559 co-relation queries the response was YES. [2024-06-27 20:22:51,229 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47317 conditions, 5677 events. 3683/5677 cut-off events. For 504553/504559 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 31070 event pairs, 1071 based on Foata normal form. 16/5692 useless extension candidates. Maximal degree in co-relation 47202. Up to 4817 conditions per place. [2024-06-27 20:22:51,251 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 272 selfloop transitions, 147 changer transitions 0/430 dead transitions. [2024-06-27 20:22:51,251 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 430 transitions, 5567 flow [2024-06-27 20:22:51,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:22:51,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:22:51,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 208 transitions. [2024-06-27 20:22:51,252 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45021645021645024 [2024-06-27 20:22:51,252 INFO L175 Difference]: Start difference. First operand has 247 places, 375 transitions, 4380 flow. Second operand 11 states and 208 transitions. [2024-06-27 20:22:51,253 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 430 transitions, 5567 flow [2024-06-27 20:22:52,140 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 430 transitions, 5352 flow, removed 36 selfloop flow, removed 4 redundant places. [2024-06-27 20:22:52,145 INFO L231 Difference]: Finished difference. Result has 255 places, 378 transitions, 4548 flow [2024-06-27 20:22:52,145 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4165, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=375, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4548, PETRI_PLACES=255, PETRI_TRANSITIONS=378} [2024-06-27 20:22:52,145 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 212 predicate places. [2024-06-27 20:22:52,146 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 378 transitions, 4548 flow [2024-06-27 20:22:52,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:22:52,146 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:22:52,146 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:22:52,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-27 20:22:52,146 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:22:52,146 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:22:52,147 INFO L85 PathProgramCache]: Analyzing trace with hash -1398424639, now seen corresponding path program 5 times [2024-06-27 20:22:52,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:22:52,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679456064] [2024-06-27 20:22:52,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:22:52,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:22:52,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:22:53,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:22:53,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:22:53,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679456064] [2024-06-27 20:22:53,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679456064] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:22:53,369 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:22:53,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:22:53,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344652105] [2024-06-27 20:22:53,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:22:53,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:22:53,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:22:53,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:22:53,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:22:53,607 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:22:53,607 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 378 transitions, 4548 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:22:53,607 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:22:53,607 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:22:53,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:22:54,973 INFO L124 PetriNetUnfolderBase]: 3758/5802 cut-off events. [2024-06-27 20:22:54,973 INFO L125 PetriNetUnfolderBase]: For 523770/523776 co-relation queries the response was YES. [2024-06-27 20:22:55,021 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48162 conditions, 5802 events. 3758/5802 cut-off events. For 523770/523776 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 32042 event pairs, 1044 based on Foata normal form. 16/5817 useless extension candidates. Maximal degree in co-relation 48046. Up to 4834 conditions per place. [2024-06-27 20:22:55,046 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 266 selfloop transitions, 158 changer transitions 0/435 dead transitions. [2024-06-27 20:22:55,047 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 435 transitions, 5755 flow [2024-06-27 20:22:55,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:22:55,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:22:55,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 208 transitions. [2024-06-27 20:22:55,048 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45021645021645024 [2024-06-27 20:22:55,048 INFO L175 Difference]: Start difference. First operand has 255 places, 378 transitions, 4548 flow. Second operand 11 states and 208 transitions. [2024-06-27 20:22:55,048 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 435 transitions, 5755 flow [2024-06-27 20:22:55,835 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 435 transitions, 5455 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-27 20:22:55,839 INFO L231 Difference]: Finished difference. Result has 263 places, 383 transitions, 4688 flow [2024-06-27 20:22:55,840 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4248, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=378, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4688, PETRI_PLACES=263, PETRI_TRANSITIONS=383} [2024-06-27 20:22:55,840 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 220 predicate places. [2024-06-27 20:22:55,840 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 383 transitions, 4688 flow [2024-06-27 20:22:55,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:22:55,840 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:22:55,840 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:22:55,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-27 20:22:55,840 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:22:55,841 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:22:55,841 INFO L85 PathProgramCache]: Analyzing trace with hash 822388455, now seen corresponding path program 2 times [2024-06-27 20:22:55,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:22:55,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938607494] [2024-06-27 20:22:55,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:22:55,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:22:55,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:22:56,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:22:56,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:22:56,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938607494] [2024-06-27 20:22:56,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938607494] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:22:56,549 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:22:56,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:22:56,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218550086] [2024-06-27 20:22:56,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:22:56,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:22:56,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:22:56,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:22:56,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:22:56,620 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:22:56,620 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 383 transitions, 4688 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:22:56,620 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:22:56,620 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:22:56,620 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:22:57,796 INFO L124 PetriNetUnfolderBase]: 3755/5781 cut-off events. [2024-06-27 20:22:57,796 INFO L125 PetriNetUnfolderBase]: For 519337/519341 co-relation queries the response was YES. [2024-06-27 20:22:57,842 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48266 conditions, 5781 events. 3755/5781 cut-off events. For 519337/519341 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 31787 event pairs, 1361 based on Foata normal form. 5/5785 useless extension candidates. Maximal degree in co-relation 48147. Up to 5518 conditions per place. [2024-06-27 20:22:57,864 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 341 selfloop transitions, 51 changer transitions 0/403 dead transitions. [2024-06-27 20:22:57,865 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 403 transitions, 5784 flow [2024-06-27 20:22:57,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:22:57,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:22:57,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-27 20:22:57,865 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43154761904761907 [2024-06-27 20:22:57,866 INFO L175 Difference]: Start difference. First operand has 263 places, 383 transitions, 4688 flow. Second operand 8 states and 145 transitions. [2024-06-27 20:22:57,866 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 403 transitions, 5784 flow [2024-06-27 20:22:58,595 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 403 transitions, 5420 flow, removed 36 selfloop flow, removed 7 redundant places. [2024-06-27 20:22:58,599 INFO L231 Difference]: Finished difference. Result has 264 places, 383 transitions, 4432 flow [2024-06-27 20:22:58,600 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4324, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=383, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=332, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4432, PETRI_PLACES=264, PETRI_TRANSITIONS=383} [2024-06-27 20:22:58,600 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 221 predicate places. [2024-06-27 20:22:58,600 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 383 transitions, 4432 flow [2024-06-27 20:22:58,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:22:58,600 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:22:58,600 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:22:58,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-27 20:22:58,601 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:22:58,601 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:22:58,601 INFO L85 PathProgramCache]: Analyzing trace with hash 1265357437, now seen corresponding path program 3 times [2024-06-27 20:22:58,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:22:58,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788763685] [2024-06-27 20:22:58,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:22:58,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:22:58,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:22:59,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:22:59,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:22:59,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788763685] [2024-06-27 20:22:59,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788763685] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:22:59,432 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:22:59,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:22:59,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581972150] [2024-06-27 20:22:59,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:22:59,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:22:59,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:22:59,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:22:59,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:22:59,531 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:22:59,531 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 383 transitions, 4432 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 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) [2024-06-27 20:22:59,531 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:22:59,531 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:22:59,531 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:23:00,811 INFO L124 PetriNetUnfolderBase]: 3765/5805 cut-off events. [2024-06-27 20:23:00,811 INFO L125 PetriNetUnfolderBase]: For 525839/525841 co-relation queries the response was YES. [2024-06-27 20:23:00,857 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47755 conditions, 5805 events. 3765/5805 cut-off events. For 525839/525841 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 31955 event pairs, 1225 based on Foata normal form. 3/5807 useless extension candidates. Maximal degree in co-relation 47635. Up to 5545 conditions per place. [2024-06-27 20:23:00,880 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 345 selfloop transitions, 55 changer transitions 0/411 dead transitions. [2024-06-27 20:23:00,880 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 411 transitions, 5394 flow [2024-06-27 20:23:00,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:23:00,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:23:00,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-27 20:23:00,881 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42328042328042326 [2024-06-27 20:23:00,881 INFO L175 Difference]: Start difference. First operand has 264 places, 383 transitions, 4432 flow. Second operand 9 states and 160 transitions. [2024-06-27 20:23:00,882 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 411 transitions, 5394 flow [2024-06-27 20:23:01,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 411 transitions, 5305 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-27 20:23:01,740 INFO L231 Difference]: Finished difference. Result has 269 places, 389 transitions, 4550 flow [2024-06-27 20:23:01,740 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4343, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=383, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=331, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4550, PETRI_PLACES=269, PETRI_TRANSITIONS=389} [2024-06-27 20:23:01,740 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 226 predicate places. [2024-06-27 20:23:01,740 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 389 transitions, 4550 flow [2024-06-27 20:23:01,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 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) [2024-06-27 20:23:01,741 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:23:01,741 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:23:01,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-27 20:23:01,741 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:23:01,741 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:23:01,742 INFO L85 PathProgramCache]: Analyzing trace with hash 1280867977, now seen corresponding path program 4 times [2024-06-27 20:23:01,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:23:01,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088700183] [2024-06-27 20:23:01,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:23:01,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:23:01,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:23:02,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:23:02,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:23:02,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088700183] [2024-06-27 20:23:02,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088700183] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:23:02,588 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:23:02,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:23:02,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930460962] [2024-06-27 20:23:02,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:23:02,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:23:02,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:23:02,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:23:02,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:23:02,676 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:23:02,677 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 389 transitions, 4550 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 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) [2024-06-27 20:23:02,677 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:23:02,677 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:23:02,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:23:03,952 INFO L124 PetriNetUnfolderBase]: 3762/5801 cut-off events. [2024-06-27 20:23:03,953 INFO L125 PetriNetUnfolderBase]: For 539462/539466 co-relation queries the response was YES. [2024-06-27 20:23:03,999 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47917 conditions, 5801 events. 3762/5801 cut-off events. For 539462/539466 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 31921 event pairs, 1207 based on Foata normal form. 5/5805 useless extension candidates. Maximal degree in co-relation 47796. Up to 5544 conditions per place. [2024-06-27 20:23:04,021 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 344 selfloop transitions, 53 changer transitions 0/408 dead transitions. [2024-06-27 20:23:04,021 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 408 transitions, 5414 flow [2024-06-27 20:23:04,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:23:04,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:23:04,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-27 20:23:04,023 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41005291005291006 [2024-06-27 20:23:04,023 INFO L175 Difference]: Start difference. First operand has 269 places, 389 transitions, 4550 flow. Second operand 9 states and 155 transitions. [2024-06-27 20:23:04,023 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 408 transitions, 5414 flow [2024-06-27 20:23:04,799 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 408 transitions, 5269 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-27 20:23:04,804 INFO L231 Difference]: Finished difference. Result has 272 places, 389 transitions, 4517 flow [2024-06-27 20:23:04,804 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4405, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=336, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4517, PETRI_PLACES=272, PETRI_TRANSITIONS=389} [2024-06-27 20:23:04,804 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 229 predicate places. [2024-06-27 20:23:04,804 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 389 transitions, 4517 flow [2024-06-27 20:23:04,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 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) [2024-06-27 20:23:04,805 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:23:04,805 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:23:04,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-27 20:23:04,805 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:23:04,805 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:23:04,805 INFO L85 PathProgramCache]: Analyzing trace with hash 822396391, now seen corresponding path program 1 times [2024-06-27 20:23:04,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:23:04,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327064524] [2024-06-27 20:23:04,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:23:04,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:23:04,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:23:05,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:23:05,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:23:05,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327064524] [2024-06-27 20:23:05,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327064524] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:23:05,487 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:23:05,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:23:05,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067421105] [2024-06-27 20:23:05,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:23:05,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:23:05,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:23:05,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:23:05,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:23:05,594 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:23:05,594 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 389 transitions, 4517 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 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) [2024-06-27 20:23:05,594 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:23:05,595 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:23:05,595 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:23:06,857 INFO L124 PetriNetUnfolderBase]: 3647/5620 cut-off events. [2024-06-27 20:23:06,857 INFO L125 PetriNetUnfolderBase]: For 573888/573931 co-relation queries the response was YES. [2024-06-27 20:23:06,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47142 conditions, 5620 events. 3647/5620 cut-off events. For 573888/573931 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 30904 event pairs, 1177 based on Foata normal form. 26/5581 useless extension candidates. Maximal degree in co-relation 47020. Up to 5300 conditions per place. [2024-06-27 20:23:06,924 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 331 selfloop transitions, 64 changer transitions 0/423 dead transitions. [2024-06-27 20:23:06,924 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 423 transitions, 5652 flow [2024-06-27 20:23:06,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:23:06,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:23:06,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-27 20:23:06,925 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-06-27 20:23:06,925 INFO L175 Difference]: Start difference. First operand has 272 places, 389 transitions, 4517 flow. Second operand 9 states and 159 transitions. [2024-06-27 20:23:06,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 423 transitions, 5652 flow [2024-06-27 20:23:07,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 423 transitions, 5546 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-27 20:23:07,749 INFO L231 Difference]: Finished difference. Result has 278 places, 401 transitions, 4750 flow [2024-06-27 20:23:07,750 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4411, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=330, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4750, PETRI_PLACES=278, PETRI_TRANSITIONS=401} [2024-06-27 20:23:07,750 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 235 predicate places. [2024-06-27 20:23:07,750 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 401 transitions, 4750 flow [2024-06-27 20:23:07,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 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) [2024-06-27 20:23:07,750 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:23:07,751 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:23:07,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-27 20:23:07,751 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:23:07,751 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:23:07,751 INFO L85 PathProgramCache]: Analyzing trace with hash -1806891323, now seen corresponding path program 5 times [2024-06-27 20:23:07,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:23:07,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794245580] [2024-06-27 20:23:07,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:23:07,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:23:07,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:23:08,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:23:08,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:23:08,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794245580] [2024-06-27 20:23:08,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794245580] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:23:08,934 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:23:08,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:23:08,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335774435] [2024-06-27 20:23:08,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:23:08,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:23:08,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:23:08,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:23:08,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:23:09,045 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:23:09,046 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 401 transitions, 4750 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 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) [2024-06-27 20:23:09,046 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:23:09,046 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:23:09,046 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:23:10,174 INFO L124 PetriNetUnfolderBase]: 3810/5869 cut-off events. [2024-06-27 20:23:10,174 INFO L125 PetriNetUnfolderBase]: For 574516/574519 co-relation queries the response was YES. [2024-06-27 20:23:10,225 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49638 conditions, 5869 events. 3810/5869 cut-off events. For 574516/574519 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 32391 event pairs, 1351 based on Foata normal form. 3/5866 useless extension candidates. Maximal degree in co-relation 49512. Up to 5540 conditions per place. [2024-06-27 20:23:10,250 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 337 selfloop transitions, 84 changer transitions 0/433 dead transitions. [2024-06-27 20:23:10,250 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 433 transitions, 5908 flow [2024-06-27 20:23:10,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:23:10,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:23:10,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-27 20:23:10,251 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2024-06-27 20:23:10,251 INFO L175 Difference]: Start difference. First operand has 278 places, 401 transitions, 4750 flow. Second operand 8 states and 150 transitions. [2024-06-27 20:23:10,251 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 433 transitions, 5908 flow [2024-06-27 20:23:11,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 433 transitions, 5820 flow, removed 27 selfloop flow, removed 3 redundant places. [2024-06-27 20:23:11,078 INFO L231 Difference]: Finished difference. Result has 283 places, 407 transitions, 4928 flow [2024-06-27 20:23:11,078 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4662, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=401, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4928, PETRI_PLACES=283, PETRI_TRANSITIONS=407} [2024-06-27 20:23:11,079 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 240 predicate places. [2024-06-27 20:23:11,079 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 407 transitions, 4928 flow [2024-06-27 20:23:11,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 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) [2024-06-27 20:23:11,079 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:23:11,079 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:23:11,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-27 20:23:11,079 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:23:11,079 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:23:11,079 INFO L85 PathProgramCache]: Analyzing trace with hash 644229347, now seen corresponding path program 6 times [2024-06-27 20:23:11,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:23:11,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922937244] [2024-06-27 20:23:11,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:23:11,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:23:11,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:23:12,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:23:12,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:23:12,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922937244] [2024-06-27 20:23:12,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922937244] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:23:12,701 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:23:12,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:23:12,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189218112] [2024-06-27 20:23:12,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:23:12,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:23:12,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:23:12,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:23:12,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:23:12,915 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:23:12,915 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 407 transitions, 4928 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:23:12,915 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:23:12,915 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:23:12,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:23:14,268 INFO L124 PetriNetUnfolderBase]: 3849/5935 cut-off events. [2024-06-27 20:23:14,268 INFO L125 PetriNetUnfolderBase]: For 609163/609165 co-relation queries the response was YES. [2024-06-27 20:23:14,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50487 conditions, 5935 events. 3849/5935 cut-off events. For 609163/609165 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 32742 event pairs, 1244 based on Foata normal form. 14/5948 useless extension candidates. Maximal degree in co-relation 50358. Up to 5276 conditions per place. [2024-06-27 20:23:14,341 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 367 selfloop transitions, 70 changer transitions 0/449 dead transitions. [2024-06-27 20:23:14,341 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 449 transitions, 6067 flow [2024-06-27 20:23:14,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:23:14,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:23:14,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 180 transitions. [2024-06-27 20:23:14,342 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-27 20:23:14,342 INFO L175 Difference]: Start difference. First operand has 283 places, 407 transitions, 4928 flow. Second operand 10 states and 180 transitions. [2024-06-27 20:23:14,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 449 transitions, 6067 flow [2024-06-27 20:23:15,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 449 transitions, 5920 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-27 20:23:15,319 INFO L231 Difference]: Finished difference. Result has 288 places, 408 transitions, 5005 flow [2024-06-27 20:23:15,319 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4781, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=407, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=337, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5005, PETRI_PLACES=288, PETRI_TRANSITIONS=408} [2024-06-27 20:23:15,319 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 245 predicate places. [2024-06-27 20:23:15,319 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 408 transitions, 5005 flow [2024-06-27 20:23:15,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:23:15,320 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:23:15,320 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:23:15,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-27 20:23:15,320 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:23:15,320 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:23:15,320 INFO L85 PathProgramCache]: Analyzing trace with hash 1561002183, now seen corresponding path program 6 times [2024-06-27 20:23:15,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:23:15,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370871640] [2024-06-27 20:23:15,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:23:15,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:23:15,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:23:16,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:23:16,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:23:16,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370871640] [2024-06-27 20:23:16,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370871640] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:23:16,368 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:23:16,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:23:16,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868819082] [2024-06-27 20:23:16,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:23:16,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:23:16,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:23:16,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:23:16,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:23:16,465 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:23:16,465 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 408 transitions, 5005 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 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) [2024-06-27 20:23:16,465 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:23:16,465 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:23:16,465 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:23:17,587 INFO L124 PetriNetUnfolderBase]: 3859/5952 cut-off events. [2024-06-27 20:23:17,587 INFO L125 PetriNetUnfolderBase]: For 596456/596458 co-relation queries the response was YES. [2024-06-27 20:23:17,639 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50780 conditions, 5952 events. 3859/5952 cut-off events. For 596456/596458 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 32982 event pairs, 1371 based on Foata normal form. 3/5951 useless extension candidates. Maximal degree in co-relation 50651. Up to 5681 conditions per place. [2024-06-27 20:23:17,665 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 358 selfloop transitions, 64 changer transitions 0/434 dead transitions. [2024-06-27 20:23:17,665 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 434 transitions, 6025 flow [2024-06-27 20:23:17,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:23:17,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:23:17,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-27 20:23:17,666 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4226190476190476 [2024-06-27 20:23:17,667 INFO L175 Difference]: Start difference. First operand has 288 places, 408 transitions, 5005 flow. Second operand 8 states and 142 transitions. [2024-06-27 20:23:17,667 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 434 transitions, 6025 flow [2024-06-27 20:23:18,639 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 434 transitions, 5823 flow, removed 35 selfloop flow, removed 8 redundant places. [2024-06-27 20:23:18,644 INFO L231 Difference]: Finished difference. Result has 288 places, 414 transitions, 5048 flow [2024-06-27 20:23:18,645 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4803, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=408, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=347, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5048, PETRI_PLACES=288, PETRI_TRANSITIONS=414} [2024-06-27 20:23:18,645 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 245 predicate places. [2024-06-27 20:23:18,645 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 414 transitions, 5048 flow [2024-06-27 20:23:18,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 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) [2024-06-27 20:23:18,645 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:23:18,645 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:23:18,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-27 20:23:18,645 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:23:18,646 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:23:18,646 INFO L85 PathProgramCache]: Analyzing trace with hash 1564546661, now seen corresponding path program 3 times [2024-06-27 20:23:18,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:23:18,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789535762] [2024-06-27 20:23:18,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:23:18,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:23:18,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:23:19,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:23:19,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:23:19,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789535762] [2024-06-27 20:23:19,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789535762] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:23:19,442 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:23:19,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:23:19,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267278709] [2024-06-27 20:23:19,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:23:19,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:23:19,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:23:19,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:23:19,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:23:19,550 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:23:19,550 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 414 transitions, 5048 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:23:19,550 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:23:19,550 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:23:19,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:23:20,777 INFO L124 PetriNetUnfolderBase]: 3877/5973 cut-off events. [2024-06-27 20:23:20,777 INFO L125 PetriNetUnfolderBase]: For 576138/576142 co-relation queries the response was YES. [2024-06-27 20:23:20,819 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50269 conditions, 5973 events. 3877/5973 cut-off events. For 576138/576142 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 33090 event pairs, 1383 based on Foata normal form. 6/5978 useless extension candidates. Maximal degree in co-relation 50139. Up to 5696 conditions per place. [2024-06-27 20:23:20,838 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 371 selfloop transitions, 60 changer transitions 0/443 dead transitions. [2024-06-27 20:23:20,839 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 443 transitions, 6370 flow [2024-06-27 20:23:20,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:23:20,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:23:20,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-27 20:23:20,839 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4421768707482993 [2024-06-27 20:23:20,839 INFO L175 Difference]: Start difference. First operand has 288 places, 414 transitions, 5048 flow. Second operand 7 states and 130 transitions. [2024-06-27 20:23:20,839 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 443 transitions, 6370 flow [2024-06-27 20:23:21,581 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 443 transitions, 6226 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-27 20:23:21,586 INFO L231 Difference]: Finished difference. Result has 289 places, 423 transitions, 5157 flow [2024-06-27 20:23:21,586 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4908, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=414, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=363, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5157, PETRI_PLACES=289, PETRI_TRANSITIONS=423} [2024-06-27 20:23:21,587 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 246 predicate places. [2024-06-27 20:23:21,587 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 423 transitions, 5157 flow [2024-06-27 20:23:21,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:23:21,587 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:23:21,587 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:23:21,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-27 20:23:21,587 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:23:21,587 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:23:21,587 INFO L85 PathProgramCache]: Analyzing trace with hash -980899395, now seen corresponding path program 4 times [2024-06-27 20:23:21,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:23:21,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370396029] [2024-06-27 20:23:21,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:23:21,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:23:21,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:23:22,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:23:22,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:23:22,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370396029] [2024-06-27 20:23:22,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370396029] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:23:22,488 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:23:22,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:23:22,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190260016] [2024-06-27 20:23:22,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:23:22,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:23:22,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:23:22,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:23:22,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:23:22,594 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:23:22,594 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 423 transitions, 5157 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:23:22,594 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:23:22,594 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:23:22,595 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:23:23,816 INFO L124 PetriNetUnfolderBase]: 3888/5983 cut-off events. [2024-06-27 20:23:23,816 INFO L125 PetriNetUnfolderBase]: For 576170/576174 co-relation queries the response was YES. [2024-06-27 20:23:23,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50462 conditions, 5983 events. 3888/5983 cut-off events. For 576170/576174 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 33031 event pairs, 1375 based on Foata normal form. 5/5987 useless extension candidates. Maximal degree in co-relation 50332. Up to 5711 conditions per place. [2024-06-27 20:23:23,881 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 366 selfloop transitions, 68 changer transitions 0/446 dead transitions. [2024-06-27 20:23:23,881 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 446 transitions, 6449 flow [2024-06-27 20:23:23,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:23:23,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:23:23,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-27 20:23:23,882 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43197278911564624 [2024-06-27 20:23:23,882 INFO L175 Difference]: Start difference. First operand has 289 places, 423 transitions, 5157 flow. Second operand 7 states and 127 transitions. [2024-06-27 20:23:23,882 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 446 transitions, 6449 flow [2024-06-27 20:23:24,854 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 446 transitions, 6304 flow, removed 37 selfloop flow, removed 4 redundant places. [2024-06-27 20:23:24,859 INFO L231 Difference]: Finished difference. Result has 292 places, 430 transitions, 5270 flow [2024-06-27 20:23:24,859 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5035, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=423, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=362, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5270, PETRI_PLACES=292, PETRI_TRANSITIONS=430} [2024-06-27 20:23:24,860 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 249 predicate places. [2024-06-27 20:23:24,860 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 430 transitions, 5270 flow [2024-06-27 20:23:24,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:23:24,860 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:23:24,860 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:23:24,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-27 20:23:24,860 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:23:24,860 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:23:24,860 INFO L85 PathProgramCache]: Analyzing trace with hash -452354623, now seen corresponding path program 7 times [2024-06-27 20:23:24,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:23:24,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626833222] [2024-06-27 20:23:24,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:23:24,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:23:24,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:23:26,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:23:26,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:23:26,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626833222] [2024-06-27 20:23:26,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626833222] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:23:26,471 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:23:26,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:23:26,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927862609] [2024-06-27 20:23:26,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:23:26,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:23:26,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:23:26,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:23:26,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:23:26,630 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:23:26,630 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 430 transitions, 5270 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:23:26,631 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:23:26,631 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:23:26,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:23:28,001 INFO L124 PetriNetUnfolderBase]: 3929/6065 cut-off events. [2024-06-27 20:23:28,001 INFO L125 PetriNetUnfolderBase]: For 596798/596804 co-relation queries the response was YES. [2024-06-27 20:23:28,055 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51071 conditions, 6065 events. 3929/6065 cut-off events. For 596798/596804 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 33730 event pairs, 1111 based on Foata normal form. 16/6080 useless extension candidates. Maximal degree in co-relation 50941. Up to 5153 conditions per place. [2024-06-27 20:23:28,080 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 327 selfloop transitions, 138 changer transitions 0/477 dead transitions. [2024-06-27 20:23:28,080 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 477 transitions, 6528 flow [2024-06-27 20:23:28,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:23:28,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:23:28,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 186 transitions. [2024-06-27 20:23:28,085 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44285714285714284 [2024-06-27 20:23:28,085 INFO L175 Difference]: Start difference. First operand has 292 places, 430 transitions, 5270 flow. Second operand 10 states and 186 transitions. [2024-06-27 20:23:28,085 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 477 transitions, 6528 flow [2024-06-27 20:23:28,918 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 477 transitions, 6431 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-27 20:23:28,923 INFO L231 Difference]: Finished difference. Result has 298 places, 431 transitions, 5527 flow [2024-06-27 20:23:28,923 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5173, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=430, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5527, PETRI_PLACES=298, PETRI_TRANSITIONS=431} [2024-06-27 20:23:28,924 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 255 predicate places. [2024-06-27 20:23:28,924 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 431 transitions, 5527 flow [2024-06-27 20:23:28,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:23:28,924 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:23:28,924 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:23:28,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-27 20:23:28,924 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:23:28,924 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:23:28,924 INFO L85 PathProgramCache]: Analyzing trace with hash -624844513, now seen corresponding path program 8 times [2024-06-27 20:23:28,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:23:28,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410966122] [2024-06-27 20:23:28,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:23:28,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:23:28,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:23:30,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:23:30,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:23:30,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410966122] [2024-06-27 20:23:30,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410966122] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:23:30,528 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:23:30,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:23:30,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494357105] [2024-06-27 20:23:30,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:23:30,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:23:30,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:23:30,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:23:30,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:23:30,719 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:23:30,719 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 431 transitions, 5527 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:23:30,719 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:23:30,719 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:23:30,719 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:23:32,015 INFO L124 PetriNetUnfolderBase]: 3970/6139 cut-off events. [2024-06-27 20:23:32,015 INFO L125 PetriNetUnfolderBase]: For 606881/606887 co-relation queries the response was YES. [2024-06-27 20:23:32,068 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52230 conditions, 6139 events. 3970/6139 cut-off events. For 606881/606887 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 34297 event pairs, 1122 based on Foata normal form. 16/6154 useless extension candidates. Maximal degree in co-relation 52100. Up to 5190 conditions per place. [2024-06-27 20:23:32,092 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 318 selfloop transitions, 146 changer transitions 0/476 dead transitions. [2024-06-27 20:23:32,092 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 476 transitions, 6761 flow [2024-06-27 20:23:32,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:23:32,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:23:32,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 189 transitions. [2024-06-27 20:23:32,093 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-27 20:23:32,093 INFO L175 Difference]: Start difference. First operand has 298 places, 431 transitions, 5527 flow. Second operand 10 states and 189 transitions. [2024-06-27 20:23:32,093 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 476 transitions, 6761 flow [2024-06-27 20:23:33,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 476 transitions, 6423 flow, removed 33 selfloop flow, removed 8 redundant places. [2024-06-27 20:23:33,141 INFO L231 Difference]: Finished difference. Result has 300 places, 432 transitions, 5561 flow [2024-06-27 20:23:33,141 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5191, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=431, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=285, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5561, PETRI_PLACES=300, PETRI_TRANSITIONS=432} [2024-06-27 20:23:33,142 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 257 predicate places. [2024-06-27 20:23:33,142 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 432 transitions, 5561 flow [2024-06-27 20:23:33,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:23:33,142 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:23:33,142 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:23:33,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-27 20:23:33,142 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:23:33,143 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:23:33,143 INFO L85 PathProgramCache]: Analyzing trace with hash -452123983, now seen corresponding path program 9 times [2024-06-27 20:23:33,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:23:33,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367867831] [2024-06-27 20:23:33,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:23:33,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:23:33,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:23:34,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:23:34,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:23:34,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367867831] [2024-06-27 20:23:34,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367867831] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:23:34,736 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:23:34,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:23:34,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058585092] [2024-06-27 20:23:34,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:23:34,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:23:34,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:23:34,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:23:34,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:23:34,948 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:23:34,948 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 432 transitions, 5561 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:23:34,948 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:23:34,948 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:23:34,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:23:36,541 INFO L124 PetriNetUnfolderBase]: 4011/6208 cut-off events. [2024-06-27 20:23:36,541 INFO L125 PetriNetUnfolderBase]: For 608262/608268 co-relation queries the response was YES. [2024-06-27 20:23:36,595 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52570 conditions, 6208 events. 4011/6208 cut-off events. For 608262/608268 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 34934 event pairs, 1113 based on Foata normal form. 16/6223 useless extension candidates. Maximal degree in co-relation 52439. Up to 5067 conditions per place. [2024-06-27 20:23:36,624 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 297 selfloop transitions, 168 changer transitions 0/477 dead transitions. [2024-06-27 20:23:36,624 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 477 transitions, 6793 flow [2024-06-27 20:23:36,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:23:36,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:23:36,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 187 transitions. [2024-06-27 20:23:36,626 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4452380952380952 [2024-06-27 20:23:36,626 INFO L175 Difference]: Start difference. First operand has 300 places, 432 transitions, 5561 flow. Second operand 10 states and 187 transitions. [2024-06-27 20:23:36,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 477 transitions, 6793 flow [2024-06-27 20:23:37,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 477 transitions, 6439 flow, removed 33 selfloop flow, removed 8 redundant places. [2024-06-27 20:23:37,532 INFO L231 Difference]: Finished difference. Result has 302 places, 433 transitions, 5623 flow [2024-06-27 20:23:37,532 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5209, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=432, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=167, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5623, PETRI_PLACES=302, PETRI_TRANSITIONS=433} [2024-06-27 20:23:37,533 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 259 predicate places. [2024-06-27 20:23:37,533 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 433 transitions, 5623 flow [2024-06-27 20:23:37,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:23:37,533 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:23:37,533 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:23:37,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-27 20:23:37,534 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:23:37,534 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:23:37,534 INFO L85 PathProgramCache]: Analyzing trace with hash 1570268517, now seen corresponding path program 2 times [2024-06-27 20:23:37,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:23:37,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104436425] [2024-06-27 20:23:37,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:23:37,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:23:37,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:23:38,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:23:38,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:23:38,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104436425] [2024-06-27 20:23:38,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104436425] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:23:38,555 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:23:38,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:23:38,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578821600] [2024-06-27 20:23:38,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:23:38,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:23:38,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:23:38,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:23:38,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:23:38,636 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:23:38,636 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 433 transitions, 5623 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 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) [2024-06-27 20:23:38,636 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:23:38,636 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:23:38,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:23:40,001 INFO L124 PetriNetUnfolderBase]: 3891/6024 cut-off events. [2024-06-27 20:23:40,001 INFO L125 PetriNetUnfolderBase]: For 615335/615390 co-relation queries the response was YES. [2024-06-27 20:23:40,046 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51764 conditions, 6024 events. 3891/6024 cut-off events. For 615335/615390 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 33874 event pairs, 1253 based on Foata normal form. 26/5983 useless extension candidates. Maximal degree in co-relation 51632. Up to 5660 conditions per place. [2024-06-27 20:23:40,068 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 352 selfloop transitions, 75 changer transitions 0/461 dead transitions. [2024-06-27 20:23:40,068 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 461 transitions, 6874 flow [2024-06-27 20:23:40,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:23:40,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:23:40,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-27 20:23:40,069 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-27 20:23:40,069 INFO L175 Difference]: Start difference. First operand has 302 places, 433 transitions, 5623 flow. Second operand 8 states and 144 transitions. [2024-06-27 20:23:40,069 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 461 transitions, 6874 flow [2024-06-27 20:23:41,095 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 461 transitions, 6476 flow, removed 33 selfloop flow, removed 8 redundant places. [2024-06-27 20:23:41,100 INFO L231 Difference]: Finished difference. Result has 302 places, 441 transitions, 5589 flow [2024-06-27 20:23:41,100 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5227, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=433, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=363, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5589, PETRI_PLACES=302, PETRI_TRANSITIONS=441} [2024-06-27 20:23:41,101 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 259 predicate places. [2024-06-27 20:23:41,101 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 441 transitions, 5589 flow [2024-06-27 20:23:41,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 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) [2024-06-27 20:23:41,101 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:23:41,101 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:23:41,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-27 20:23:41,102 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:23:41,102 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:23:41,102 INFO L85 PathProgramCache]: Analyzing trace with hash 1570256613, now seen corresponding path program 7 times [2024-06-27 20:23:41,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:23:41,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012106602] [2024-06-27 20:23:41,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:23:41,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:23:41,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:23:42,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:23:42,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:23:42,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012106602] [2024-06-27 20:23:42,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012106602] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:23:42,167 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:23:42,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:23:42,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023424415] [2024-06-27 20:23:42,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:23:42,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:23:42,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:23:42,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:23:42,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:23:42,257 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:23:42,257 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 441 transitions, 5589 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 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) [2024-06-27 20:23:42,257 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:23:42,257 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:23:42,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:23:43,427 INFO L124 PetriNetUnfolderBase]: 4076/6295 cut-off events. [2024-06-27 20:23:43,428 INFO L125 PetriNetUnfolderBase]: For 591381/591395 co-relation queries the response was YES. [2024-06-27 20:23:43,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52900 conditions, 6295 events. 4076/6295 cut-off events. For 591381/591395 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 35345 event pairs, 1286 based on Foata normal form. 5/6294 useless extension candidates. Maximal degree in co-relation 52767. Up to 6032 conditions per place. [2024-06-27 20:23:43,510 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 389 selfloop transitions, 58 changer transitions 0/459 dead transitions. [2024-06-27 20:23:43,510 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 459 transitions, 6597 flow [2024-06-27 20:23:43,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:23:43,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:23:43,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-27 20:23:43,511 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40773809523809523 [2024-06-27 20:23:43,511 INFO L175 Difference]: Start difference. First operand has 302 places, 441 transitions, 5589 flow. Second operand 8 states and 137 transitions. [2024-06-27 20:23:43,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 459 transitions, 6597 flow [2024-06-27 20:23:44,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 459 transitions, 6433 flow, removed 55 selfloop flow, removed 4 redundant places. [2024-06-27 20:23:44,708 INFO L231 Difference]: Finished difference. Result has 306 places, 444 transitions, 5613 flow [2024-06-27 20:23:44,708 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5425, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=441, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=383, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5613, PETRI_PLACES=306, PETRI_TRANSITIONS=444} [2024-06-27 20:23:44,708 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 263 predicate places. [2024-06-27 20:23:44,708 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 444 transitions, 5613 flow [2024-06-27 20:23:44,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 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) [2024-06-27 20:23:44,709 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:23:44,709 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:23:44,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-27 20:23:44,709 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:23:44,709 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:23:44,709 INFO L85 PathProgramCache]: Analyzing trace with hash 215060699, now seen corresponding path program 5 times [2024-06-27 20:23:44,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:23:44,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93539603] [2024-06-27 20:23:44,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:23:44,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:23:44,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:23:45,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:23:45,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:23:45,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93539603] [2024-06-27 20:23:45,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93539603] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:23:45,483 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:23:45,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:23:45,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587856926] [2024-06-27 20:23:45,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:23:45,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:23:45,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:23:45,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:23:45,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:23:45,545 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:23:45,546 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 444 transitions, 5613 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:23:45,546 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:23:45,546 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:23:45,546 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:23:46,822 INFO L124 PetriNetUnfolderBase]: 4070/6296 cut-off events. [2024-06-27 20:23:46,822 INFO L125 PetriNetUnfolderBase]: For 602966/602966 co-relation queries the response was YES. [2024-06-27 20:23:46,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52712 conditions, 6296 events. 4070/6296 cut-off events. For 602966/602966 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 35454 event pairs, 1726 based on Foata normal form. 2/6297 useless extension candidates. Maximal degree in co-relation 52577. Up to 6075 conditions per place. [2024-06-27 20:23:46,906 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 417 selfloop transitions, 31 changer transitions 0/460 dead transitions. [2024-06-27 20:23:46,906 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 460 transitions, 6708 flow [2024-06-27 20:23:46,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:23:46,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:23:46,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-27 20:23:46,907 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4217687074829932 [2024-06-27 20:23:46,907 INFO L175 Difference]: Start difference. First operand has 306 places, 444 transitions, 5613 flow. Second operand 7 states and 124 transitions. [2024-06-27 20:23:46,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 460 transitions, 6708 flow [2024-06-27 20:23:48,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 460 transitions, 6540 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-27 20:23:48,183 INFO L231 Difference]: Finished difference. Result has 307 places, 444 transitions, 5519 flow [2024-06-27 20:23:48,183 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5447, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=444, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=413, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5519, PETRI_PLACES=307, PETRI_TRANSITIONS=444} [2024-06-27 20:23:48,183 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 264 predicate places. [2024-06-27 20:23:48,183 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 444 transitions, 5519 flow [2024-06-27 20:23:48,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:23:48,184 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:23:48,184 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:23:48,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-27 20:23:48,184 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:23:48,184 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:23:48,184 INFO L85 PathProgramCache]: Analyzing trace with hash 2023301149, now seen corresponding path program 6 times [2024-06-27 20:23:48,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:23:48,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704835659] [2024-06-27 20:23:48,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:23:48,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:23:48,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:23:48,823 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:23:48,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:23:48,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704835659] [2024-06-27 20:23:48,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704835659] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:23:48,823 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:23:48,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:23:48,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869833868] [2024-06-27 20:23:48,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:23:48,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:23:48,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:23:48,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:23:48,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:23:48,914 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:23:48,914 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 444 transitions, 5519 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:23:48,914 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:23:48,914 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:23:48,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:23:50,156 INFO L124 PetriNetUnfolderBase]: 4075/6301 cut-off events. [2024-06-27 20:23:50,156 INFO L125 PetriNetUnfolderBase]: For 600566/600576 co-relation queries the response was YES. [2024-06-27 20:23:50,216 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52650 conditions, 6301 events. 4075/6301 cut-off events. For 600566/600576 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 35570 event pairs, 1739 based on Foata normal form. 1/6296 useless extension candidates. Maximal degree in co-relation 52515. Up to 6102 conditions per place. [2024-06-27 20:23:50,243 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 427 selfloop transitions, 20 changer transitions 0/459 dead transitions. [2024-06-27 20:23:50,243 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 459 transitions, 6514 flow [2024-06-27 20:23:50,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:23:50,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:23:50,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-27 20:23:50,244 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-27 20:23:50,244 INFO L175 Difference]: Start difference. First operand has 307 places, 444 transitions, 5519 flow. Second operand 7 states and 119 transitions. [2024-06-27 20:23:50,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 459 transitions, 6514 flow [2024-06-27 20:23:51,365 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 459 transitions, 6394 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-27 20:23:51,371 INFO L231 Difference]: Finished difference. Result has 308 places, 447 transitions, 5502 flow [2024-06-27 20:23:51,371 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5411, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=444, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=424, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5502, PETRI_PLACES=308, PETRI_TRANSITIONS=447} [2024-06-27 20:23:51,371 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 265 predicate places. [2024-06-27 20:23:51,371 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 447 transitions, 5502 flow [2024-06-27 20:23:51,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:23:51,372 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:23:51,372 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:23:51,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-27 20:23:51,372 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:23:51,372 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:23:51,373 INFO L85 PathProgramCache]: Analyzing trace with hash -362113155, now seen corresponding path program 7 times [2024-06-27 20:23:51,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:23:51,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943882496] [2024-06-27 20:23:51,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:23:51,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:23:51,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:23:52,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:23:52,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:23:52,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943882496] [2024-06-27 20:23:52,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943882496] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:23:52,101 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:23:52,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:23:52,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952208433] [2024-06-27 20:23:52,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:23:52,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:23:52,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:23:52,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:23:52,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:23:52,162 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:23:52,162 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 447 transitions, 5502 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:23:52,162 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:23:52,162 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:23:52,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:23:53,462 INFO L124 PetriNetUnfolderBase]: 4072/6301 cut-off events. [2024-06-27 20:23:53,462 INFO L125 PetriNetUnfolderBase]: For 614261/614263 co-relation queries the response was YES. [2024-06-27 20:23:53,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52721 conditions, 6301 events. 4072/6301 cut-off events. For 614261/614263 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 35565 event pairs, 1735 based on Foata normal form. 3/6303 useless extension candidates. Maximal degree in co-relation 52586. Up to 6088 conditions per place. [2024-06-27 20:23:53,539 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 417 selfloop transitions, 28 changer transitions 0/457 dead transitions. [2024-06-27 20:23:53,539 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 457 transitions, 6558 flow [2024-06-27 20:23:53,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:23:53,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:23:53,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-27 20:23:53,540 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4013605442176871 [2024-06-27 20:23:53,540 INFO L175 Difference]: Start difference. First operand has 308 places, 447 transitions, 5502 flow. Second operand 7 states and 118 transitions. [2024-06-27 20:23:53,540 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 457 transitions, 6558 flow [2024-06-27 20:23:54,624 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 457 transitions, 6492 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-27 20:23:54,629 INFO L231 Difference]: Finished difference. Result has 310 places, 447 transitions, 5498 flow [2024-06-27 20:23:54,630 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5436, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=447, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=419, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5498, PETRI_PLACES=310, PETRI_TRANSITIONS=447} [2024-06-27 20:23:54,630 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 267 predicate places. [2024-06-27 20:23:54,630 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 447 transitions, 5498 flow [2024-06-27 20:23:54,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:23:54,630 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:23:54,630 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:23:54,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-27 20:23:54,630 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:23:54,631 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:23:54,631 INFO L85 PathProgramCache]: Analyzing trace with hash 1422598363, now seen corresponding path program 8 times [2024-06-27 20:23:54,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:23:54,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822819402] [2024-06-27 20:23:54,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:23:54,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:23:54,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:23:55,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:23:55,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:23:55,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822819402] [2024-06-27 20:23:55,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822819402] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:23:55,273 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:23:55,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:23:55,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587842790] [2024-06-27 20:23:55,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:23:55,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:23:55,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:23:55,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:23:55,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:23:55,352 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:23:55,353 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 447 transitions, 5498 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:23:55,353 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:23:55,353 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:23:55,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:23:56,584 INFO L124 PetriNetUnfolderBase]: 4069/6297 cut-off events. [2024-06-27 20:23:56,585 INFO L125 PetriNetUnfolderBase]: For 628471/628473 co-relation queries the response was YES. [2024-06-27 20:23:56,644 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52869 conditions, 6297 events. 4069/6297 cut-off events. For 628471/628473 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 35473 event pairs, 1735 based on Foata normal form. 3/6299 useless extension candidates. Maximal degree in co-relation 52733. Up to 6094 conditions per place. [2024-06-27 20:23:56,670 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 424 selfloop transitions, 20 changer transitions 0/456 dead transitions. [2024-06-27 20:23:56,670 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 456 transitions, 6418 flow [2024-06-27 20:23:56,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:23:56,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:23:56,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-27 20:23:56,671 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3945578231292517 [2024-06-27 20:23:56,671 INFO L175 Difference]: Start difference. First operand has 310 places, 447 transitions, 5498 flow. Second operand 7 states and 116 transitions. [2024-06-27 20:23:56,671 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 456 transitions, 6418 flow [2024-06-27 20:23:57,793 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 456 transitions, 6280 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-27 20:23:57,798 INFO L231 Difference]: Finished difference. Result has 310 places, 447 transitions, 5406 flow [2024-06-27 20:23:57,798 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5360, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=447, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=427, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5406, PETRI_PLACES=310, PETRI_TRANSITIONS=447} [2024-06-27 20:23:57,799 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 267 predicate places. [2024-06-27 20:23:57,799 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 447 transitions, 5406 flow [2024-06-27 20:23:57,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:23:57,799 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:23:57,799 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:23:57,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-27 20:23:57,799 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:23:57,800 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:23:57,800 INFO L85 PathProgramCache]: Analyzing trace with hash -529015901, now seen corresponding path program 10 times [2024-06-27 20:23:57,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:23:57,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428342021] [2024-06-27 20:23:57,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:23:57,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:23:57,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:23:59,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:23:59,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:23:59,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428342021] [2024-06-27 20:23:59,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428342021] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:23:59,392 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:23:59,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:23:59,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665915474] [2024-06-27 20:23:59,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:23:59,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:23:59,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:23:59,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:23:59,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:23:59,576 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:23:59,577 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 447 transitions, 5406 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:23:59,577 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:23:59,577 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:23:59,577 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:24:00,994 INFO L124 PetriNetUnfolderBase]: 4110/6358 cut-off events. [2024-06-27 20:24:00,994 INFO L125 PetriNetUnfolderBase]: For 666686/666696 co-relation queries the response was YES. [2024-06-27 20:24:01,052 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53633 conditions, 6358 events. 4110/6358 cut-off events. For 666686/666696 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 35935 event pairs, 1690 based on Foata normal form. 12/6364 useless extension candidates. Maximal degree in co-relation 53497. Up to 5866 conditions per place. [2024-06-27 20:24:01,077 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 410 selfloop transitions, 64 changer transitions 0/486 dead transitions. [2024-06-27 20:24:01,078 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 486 transitions, 6612 flow [2024-06-27 20:24:01,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:24:01,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:24:01,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 180 transitions. [2024-06-27 20:24:01,079 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-27 20:24:01,079 INFO L175 Difference]: Start difference. First operand has 310 places, 447 transitions, 5406 flow. Second operand 10 states and 180 transitions. [2024-06-27 20:24:01,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 486 transitions, 6612 flow [2024-06-27 20:24:02,221 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 486 transitions, 6570 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-27 20:24:02,227 INFO L231 Difference]: Finished difference. Result has 315 places, 448 transitions, 5568 flow [2024-06-27 20:24:02,227 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5364, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=447, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=383, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5568, PETRI_PLACES=315, PETRI_TRANSITIONS=448} [2024-06-27 20:24:02,227 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 272 predicate places. [2024-06-27 20:24:02,228 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 448 transitions, 5568 flow [2024-06-27 20:24:02,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:24:02,228 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:24:02,228 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:24:02,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-27 20:24:02,228 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:24:02,228 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:24:02,228 INFO L85 PathProgramCache]: Analyzing trace with hash -2123831163, now seen corresponding path program 11 times [2024-06-27 20:24:02,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:24:02,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452893413] [2024-06-27 20:24:02,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:24:02,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:24:02,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:24:03,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:24:03,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:24:03,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452893413] [2024-06-27 20:24:03,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452893413] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:24:03,777 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:24:03,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:24:03,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33249374] [2024-06-27 20:24:03,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:24:03,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:24:03,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:24:03,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:24:03,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:24:03,969 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:24:03,969 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 448 transitions, 5568 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:24:03,969 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:24:03,969 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:24:03,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:24:05,466 INFO L124 PetriNetUnfolderBase]: 4151/6433 cut-off events. [2024-06-27 20:24:05,466 INFO L125 PetriNetUnfolderBase]: For 692666/692676 co-relation queries the response was YES. [2024-06-27 20:24:05,522 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54813 conditions, 6433 events. 4151/6433 cut-off events. For 692666/692676 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 36584 event pairs, 1726 based on Foata normal form. 12/6439 useless extension candidates. Maximal degree in co-relation 54676. Up to 6023 conditions per place. [2024-06-27 20:24:05,547 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 432 selfloop transitions, 41 changer transitions 0/485 dead transitions. [2024-06-27 20:24:05,547 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 485 transitions, 6758 flow [2024-06-27 20:24:05,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:24:05,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:24:05,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 176 transitions. [2024-06-27 20:24:05,548 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41904761904761906 [2024-06-27 20:24:05,548 INFO L175 Difference]: Start difference. First operand has 315 places, 448 transitions, 5568 flow. Second operand 10 states and 176 transitions. [2024-06-27 20:24:05,548 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 485 transitions, 6758 flow [2024-06-27 20:24:06,693 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 485 transitions, 6572 flow, removed 30 selfloop flow, removed 8 redundant places. [2024-06-27 20:24:06,699 INFO L231 Difference]: Finished difference. Result has 317 places, 449 transitions, 5543 flow [2024-06-27 20:24:06,699 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5382, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=448, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=407, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5543, PETRI_PLACES=317, PETRI_TRANSITIONS=449} [2024-06-27 20:24:06,699 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 274 predicate places. [2024-06-27 20:24:06,699 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 449 transitions, 5543 flow [2024-06-27 20:24:06,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:24:06,699 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:24:06,699 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:24:06,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-27 20:24:06,700 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:24:06,700 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:24:06,700 INFO L85 PathProgramCache]: Analyzing trace with hash -2123600523, now seen corresponding path program 12 times [2024-06-27 20:24:06,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:24:06,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046523628] [2024-06-27 20:24:06,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:24:06,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:24:06,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:24:08,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:24:08,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:24:08,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046523628] [2024-06-27 20:24:08,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046523628] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:24:08,105 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:24:08,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:24:08,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247839915] [2024-06-27 20:24:08,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:24:08,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:24:08,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:24:08,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:24:08,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:24:08,284 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:24:08,284 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 449 transitions, 5543 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:24:08,284 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:24:08,284 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:24:08,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:24:09,753 INFO L124 PetriNetUnfolderBase]: 4192/6507 cut-off events. [2024-06-27 20:24:09,753 INFO L125 PetriNetUnfolderBase]: For 712686/712696 co-relation queries the response was YES. [2024-06-27 20:24:09,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55296 conditions, 6507 events. 4192/6507 cut-off events. For 712686/712696 co-relation queries the response was YES. Maximal size of possible extension queue 290. Compared 37177 event pairs, 1748 based on Foata normal form. 12/6513 useless extension candidates. Maximal degree in co-relation 55158. Up to 6006 conditions per place. [2024-06-27 20:24:09,837 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 427 selfloop transitions, 47 changer transitions 0/486 dead transitions. [2024-06-27 20:24:09,837 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 486 transitions, 6734 flow [2024-06-27 20:24:09,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:24:09,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:24:09,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 177 transitions. [2024-06-27 20:24:09,838 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42142857142857143 [2024-06-27 20:24:09,838 INFO L175 Difference]: Start difference. First operand has 317 places, 449 transitions, 5543 flow. Second operand 10 states and 177 transitions. [2024-06-27 20:24:09,838 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 486 transitions, 6734 flow [2024-06-27 20:24:11,028 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 486 transitions, 6593 flow, removed 31 selfloop flow, removed 8 redundant places. [2024-06-27 20:24:11,033 INFO L231 Difference]: Finished difference. Result has 319 places, 450 transitions, 5577 flow [2024-06-27 20:24:11,034 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5402, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=449, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=402, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5577, PETRI_PLACES=319, PETRI_TRANSITIONS=450} [2024-06-27 20:24:11,034 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 276 predicate places. [2024-06-27 20:24:11,034 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 450 transitions, 5577 flow [2024-06-27 20:24:11,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:24:11,034 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:24:11,034 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:24:11,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-27 20:24:11,035 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:24:11,035 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:24:11,035 INFO L85 PathProgramCache]: Analyzing trace with hash -2093504217, now seen corresponding path program 13 times [2024-06-27 20:24:11,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:24:11,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43387219] [2024-06-27 20:24:11,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:24:11,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:24:11,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:24:12,652 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:24:12,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:24:12,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43387219] [2024-06-27 20:24:12,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43387219] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:24:12,653 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:24:12,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:24:12,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555031667] [2024-06-27 20:24:12,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:24:12,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:24:12,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:24:12,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:24:12,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:24:12,873 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:24:12,873 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 450 transitions, 5577 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:24:12,873 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:24:12,874 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:24:12,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:24:14,571 INFO L124 PetriNetUnfolderBase]: 4352/6762 cut-off events. [2024-06-27 20:24:14,571 INFO L125 PetriNetUnfolderBase]: For 733494/733504 co-relation queries the response was YES. [2024-06-27 20:24:14,636 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56806 conditions, 6762 events. 4352/6762 cut-off events. For 733494/733504 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 39071 event pairs, 1773 based on Foata normal form. 12/6768 useless extension candidates. Maximal degree in co-relation 56667. Up to 6090 conditions per place. [2024-06-27 20:24:14,663 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 429 selfloop transitions, 69 changer transitions 0/510 dead transitions. [2024-06-27 20:24:14,663 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 510 transitions, 6975 flow [2024-06-27 20:24:14,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 20:24:14,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 20:24:14,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 219 transitions. [2024-06-27 20:24:14,664 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43452380952380953 [2024-06-27 20:24:14,664 INFO L175 Difference]: Start difference. First operand has 319 places, 450 transitions, 5577 flow. Second operand 12 states and 219 transitions. [2024-06-27 20:24:14,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 510 transitions, 6975 flow [2024-06-27 20:24:16,111 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 510 transitions, 6820 flow, removed 32 selfloop flow, removed 8 redundant places. [2024-06-27 20:24:16,116 INFO L231 Difference]: Finished difference. Result has 324 places, 458 transitions, 5709 flow [2024-06-27 20:24:16,116 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5422, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=450, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=384, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5709, PETRI_PLACES=324, PETRI_TRANSITIONS=458} [2024-06-27 20:24:16,117 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 281 predicate places. [2024-06-27 20:24:16,117 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 458 transitions, 5709 flow [2024-06-27 20:24:16,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:24:16,117 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:24:16,117 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:24:16,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-27 20:24:16,118 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:24:16,118 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:24:16,118 INFO L85 PathProgramCache]: Analyzing trace with hash -2093273577, now seen corresponding path program 14 times [2024-06-27 20:24:16,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:24:16,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066812640] [2024-06-27 20:24:16,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:24:16,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:24:16,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:24:17,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:24:17,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:24:17,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066812640] [2024-06-27 20:24:17,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066812640] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:24:17,586 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:24:17,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:24:17,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690914875] [2024-06-27 20:24:17,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:24:17,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:24:17,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:24:17,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:24:17,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:24:17,759 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:24:17,759 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 458 transitions, 5709 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:24:17,759 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:24:17,759 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:24:17,759 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:24:19,347 INFO L124 PetriNetUnfolderBase]: 4393/6835 cut-off events. [2024-06-27 20:24:19,347 INFO L125 PetriNetUnfolderBase]: For 754862/754872 co-relation queries the response was YES. [2024-06-27 20:24:19,408 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57603 conditions, 6835 events. 4393/6835 cut-off events. For 754862/754872 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 39753 event pairs, 1797 based on Foata normal form. 12/6841 useless extension candidates. Maximal degree in co-relation 57462. Up to 6274 conditions per place. [2024-06-27 20:24:19,434 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 418 selfloop transitions, 67 changer transitions 0/497 dead transitions. [2024-06-27 20:24:19,435 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 497 transitions, 6942 flow [2024-06-27 20:24:19,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:24:19,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:24:19,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 181 transitions. [2024-06-27 20:24:19,436 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.430952380952381 [2024-06-27 20:24:19,436 INFO L175 Difference]: Start difference. First operand has 324 places, 458 transitions, 5709 flow. Second operand 10 states and 181 transitions. [2024-06-27 20:24:19,436 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 497 transitions, 6942 flow [2024-06-27 20:24:20,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 497 transitions, 6808 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-27 20:24:20,831 INFO L231 Difference]: Finished difference. Result has 328 places, 459 transitions, 5793 flow [2024-06-27 20:24:20,832 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5575, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=458, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=391, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5793, PETRI_PLACES=328, PETRI_TRANSITIONS=459} [2024-06-27 20:24:20,832 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 285 predicate places. [2024-06-27 20:24:20,832 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 459 transitions, 5793 flow [2024-06-27 20:24:20,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:24:20,832 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:24:20,832 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:24:20,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-27 20:24:20,833 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:24:20,833 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:24:20,833 INFO L85 PathProgramCache]: Analyzing trace with hash -207337203, now seen corresponding path program 15 times [2024-06-27 20:24:20,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:24:20,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226945618] [2024-06-27 20:24:20,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:24:20,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:24:20,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:24:21,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:24:21,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:24:21,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226945618] [2024-06-27 20:24:21,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226945618] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:24:21,951 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:24:21,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:24:21,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123920849] [2024-06-27 20:24:21,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:24:21,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:24:21,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:24:21,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:24:21,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:24:22,092 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:24:22,092 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 459 transitions, 5793 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 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) [2024-06-27 20:24:22,093 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:24:22,093 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:24:22,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:24:23,728 INFO L124 PetriNetUnfolderBase]: 4373/6805 cut-off events. [2024-06-27 20:24:23,728 INFO L125 PetriNetUnfolderBase]: For 744841/744851 co-relation queries the response was YES. [2024-06-27 20:24:23,781 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56724 conditions, 6805 events. 4373/6805 cut-off events. For 744841/744851 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 39450 event pairs, 1785 based on Foata normal form. 12/6811 useless extension candidates. Maximal degree in co-relation 56581. Up to 6467 conditions per place. [2024-06-27 20:24:23,806 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 461 selfloop transitions, 21 changer transitions 0/494 dead transitions. [2024-06-27 20:24:23,806 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 494 transitions, 6833 flow [2024-06-27 20:24:23,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:24:23,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:24:23,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 173 transitions. [2024-06-27 20:24:23,807 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4119047619047619 [2024-06-27 20:24:23,807 INFO L175 Difference]: Start difference. First operand has 328 places, 459 transitions, 5793 flow. Second operand 10 states and 173 transitions. [2024-06-27 20:24:23,808 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 494 transitions, 6833 flow [2024-06-27 20:24:25,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 494 transitions, 6633 flow, removed 34 selfloop flow, removed 8 redundant places. [2024-06-27 20:24:25,062 INFO L231 Difference]: Finished difference. Result has 329 places, 458 transitions, 5547 flow [2024-06-27 20:24:25,062 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5501, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=458, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=437, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5547, PETRI_PLACES=329, PETRI_TRANSITIONS=458} [2024-06-27 20:24:25,062 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 286 predicate places. [2024-06-27 20:24:25,062 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 458 transitions, 5547 flow [2024-06-27 20:24:25,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 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) [2024-06-27 20:24:25,063 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:24:25,063 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:24:25,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-27 20:24:25,063 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:24:25,063 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:24:25,063 INFO L85 PathProgramCache]: Analyzing trace with hash -2065183331, now seen corresponding path program 3 times [2024-06-27 20:24:25,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:24:25,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472386154] [2024-06-27 20:24:25,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:24:25,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:24:25,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:24:25,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:24:25,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:24:25,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472386154] [2024-06-27 20:24:25,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472386154] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:24:25,828 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:24:25,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:24:25,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355774853] [2024-06-27 20:24:25,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:24:25,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:24:25,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:24:25,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:24:25,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:24:25,915 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:24:25,916 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 458 transitions, 5547 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 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) [2024-06-27 20:24:25,916 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:24:25,916 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:24:25,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:24:27,252 INFO L124 PetriNetUnfolderBase]: 4231/6592 cut-off events. [2024-06-27 20:24:27,252 INFO L125 PetriNetUnfolderBase]: For 784321/784419 co-relation queries the response was YES. [2024-06-27 20:24:27,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55760 conditions, 6592 events. 4231/6592 cut-off events. For 784321/784419 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 38599 event pairs, 1770 based on Foata normal form. 30/6546 useless extension candidates. Maximal degree in co-relation 55616. Up to 6336 conditions per place. [2024-06-27 20:24:27,338 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 421 selfloop transitions, 27 changer transitions 0/483 dead transitions. [2024-06-27 20:24:27,338 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 483 transitions, 6917 flow [2024-06-27 20:24:27,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:24:27,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:24:27,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-27 20:24:27,339 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3958333333333333 [2024-06-27 20:24:27,339 INFO L175 Difference]: Start difference. First operand has 329 places, 458 transitions, 5547 flow. Second operand 8 states and 133 transitions. [2024-06-27 20:24:27,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 483 transitions, 6917 flow [2024-06-27 20:24:28,799 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 483 transitions, 6768 flow, removed 35 selfloop flow, removed 9 redundant places. [2024-06-27 20:24:28,804 INFO L231 Difference]: Finished difference. Result has 328 places, 468 transitions, 5746 flow [2024-06-27 20:24:28,805 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5398, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=458, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=436, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5746, PETRI_PLACES=328, PETRI_TRANSITIONS=468} [2024-06-27 20:24:28,805 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 285 predicate places. [2024-06-27 20:24:28,805 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 468 transitions, 5746 flow [2024-06-27 20:24:28,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 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) [2024-06-27 20:24:28,805 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:24:28,805 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:24:28,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-27 20:24:28,805 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:24:28,806 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:24:28,806 INFO L85 PathProgramCache]: Analyzing trace with hash 1430224859, now seen corresponding path program 4 times [2024-06-27 20:24:28,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:24:28,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252413990] [2024-06-27 20:24:28,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:24:28,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:24:28,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:24:29,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:24:29,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:24:29,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252413990] [2024-06-27 20:24:29,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252413990] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:24:29,504 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:24:29,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:24:29,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681257274] [2024-06-27 20:24:29,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:24:29,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:24:29,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:24:29,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:24:29,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:24:29,604 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:24:29,605 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 468 transitions, 5746 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 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) [2024-06-27 20:24:29,605 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:24:29,605 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:24:29,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:24:30,963 INFO L124 PetriNetUnfolderBase]: 4214/6569 cut-off events. [2024-06-27 20:24:30,963 INFO L125 PetriNetUnfolderBase]: For 778093/778173 co-relation queries the response was YES. [2024-06-27 20:24:31,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54775 conditions, 6569 events. 4214/6569 cut-off events. For 778093/778173 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 38437 event pairs, 1779 based on Foata normal form. 31/6526 useless extension candidates. Maximal degree in co-relation 54631. Up to 6337 conditions per place. [2024-06-27 20:24:31,051 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 425 selfloop transitions, 20 changer transitions 0/480 dead transitions. [2024-06-27 20:24:31,051 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 480 transitions, 6677 flow [2024-06-27 20:24:31,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:24:31,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:24:31,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-27 20:24:31,052 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-27 20:24:31,052 INFO L175 Difference]: Start difference. First operand has 328 places, 468 transitions, 5746 flow. Second operand 8 states and 128 transitions. [2024-06-27 20:24:31,052 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 480 transitions, 6677 flow [2024-06-27 20:24:32,284 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 480 transitions, 6447 flow, removed 104 selfloop flow, removed 4 redundant places. [2024-06-27 20:24:32,289 INFO L231 Difference]: Finished difference. Result has 332 places, 468 transitions, 5564 flow [2024-06-27 20:24:32,290 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5516, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=468, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=448, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5564, PETRI_PLACES=332, PETRI_TRANSITIONS=468} [2024-06-27 20:24:32,290 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 289 predicate places. [2024-06-27 20:24:32,290 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 468 transitions, 5564 flow [2024-06-27 20:24:32,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 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) [2024-06-27 20:24:32,290 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:24:32,290 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:24:32,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-27 20:24:32,290 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:24:32,291 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:24:32,291 INFO L85 PathProgramCache]: Analyzing trace with hash -2078070341, now seen corresponding path program 5 times [2024-06-27 20:24:32,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:24:32,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549714052] [2024-06-27 20:24:32,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:24:32,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:24:32,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:24:33,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:24:33,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:24:33,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549714052] [2024-06-27 20:24:33,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549714052] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:24:33,118 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:24:33,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:24:33,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857371219] [2024-06-27 20:24:33,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:24:33,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:24:33,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:24:33,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:24:33,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:24:33,217 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:24:33,217 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 468 transitions, 5564 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 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) [2024-06-27 20:24:33,217 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:24:33,217 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:24:33,217 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:24:34,587 INFO L124 PetriNetUnfolderBase]: 4202/6551 cut-off events. [2024-06-27 20:24:34,587 INFO L125 PetriNetUnfolderBase]: For 776483/776551 co-relation queries the response was YES. [2024-06-27 20:24:34,647 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54155 conditions, 6551 events. 4202/6551 cut-off events. For 776483/776551 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 38313 event pairs, 1774 based on Foata normal form. 30/6510 useless extension candidates. Maximal degree in co-relation 54010. Up to 6293 conditions per place. [2024-06-27 20:24:34,671 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 409 selfloop transitions, 38 changer transitions 0/482 dead transitions. [2024-06-27 20:24:34,672 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 482 transitions, 6506 flow [2024-06-27 20:24:34,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:24:34,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:24:34,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-27 20:24:34,673 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39880952380952384 [2024-06-27 20:24:34,673 INFO L175 Difference]: Start difference. First operand has 332 places, 468 transitions, 5564 flow. Second operand 8 states and 134 transitions. [2024-06-27 20:24:34,673 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 482 transitions, 6506 flow [2024-06-27 20:24:35,969 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 482 transitions, 6380 flow, removed 40 selfloop flow, removed 7 redundant places. [2024-06-27 20:24:35,977 INFO L231 Difference]: Finished difference. Result has 333 places, 468 transitions, 5522 flow [2024-06-27 20:24:35,977 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5438, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=468, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=430, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5522, PETRI_PLACES=333, PETRI_TRANSITIONS=468} [2024-06-27 20:24:35,978 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 290 predicate places. [2024-06-27 20:24:35,978 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 468 transitions, 5522 flow [2024-06-27 20:24:35,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 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) [2024-06-27 20:24:35,978 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:24:35,978 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:24:35,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-27 20:24:35,978 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:24:35,979 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:24:35,979 INFO L85 PathProgramCache]: Analyzing trace with hash -2078082245, now seen corresponding path program 8 times [2024-06-27 20:24:35,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:24:35,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402862470] [2024-06-27 20:24:35,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:24:35,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:24:35,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:24:36,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:24:36,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:24:36,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402862470] [2024-06-27 20:24:36,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402862470] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:24:36,954 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:24:36,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:24:36,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589629002] [2024-06-27 20:24:36,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:24:36,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:24:36,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:24:36,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:24:36,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:24:37,033 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:24:37,034 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 468 transitions, 5522 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 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) [2024-06-27 20:24:37,034 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:24:37,034 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:24:37,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:24:38,368 INFO L124 PetriNetUnfolderBase]: 4410/6857 cut-off events. [2024-06-27 20:24:38,368 INFO L125 PetriNetUnfolderBase]: For 759436/759440 co-relation queries the response was YES. [2024-06-27 20:24:38,435 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56112 conditions, 6857 events. 4410/6857 cut-off events. For 759436/759440 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 39823 event pairs, 1825 based on Foata normal form. 1/6849 useless extension candidates. Maximal degree in co-relation 55966. Up to 6667 conditions per place. [2024-06-27 20:24:38,462 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 448 selfloop transitions, 18 changer transitions 0/478 dead transitions. [2024-06-27 20:24:38,462 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 478 transitions, 6488 flow [2024-06-27 20:24:38,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:24:38,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:24:38,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-27 20:24:38,463 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-27 20:24:38,463 INFO L175 Difference]: Start difference. First operand has 333 places, 468 transitions, 5522 flow. Second operand 8 states and 126 transitions. [2024-06-27 20:24:38,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 478 transitions, 6488 flow [2024-06-27 20:24:40,100 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 478 transitions, 6288 flow, removed 33 selfloop flow, removed 8 redundant places. [2024-06-27 20:24:40,106 INFO L231 Difference]: Finished difference. Result has 333 places, 468 transitions, 5364 flow [2024-06-27 20:24:40,106 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5322, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=468, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=450, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5364, PETRI_PLACES=333, PETRI_TRANSITIONS=468} [2024-06-27 20:24:40,106 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 290 predicate places. [2024-06-27 20:24:40,106 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 468 transitions, 5364 flow [2024-06-27 20:24:40,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 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) [2024-06-27 20:24:40,106 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:24:40,106 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:24:40,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-27 20:24:40,107 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:24:40,107 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:24:40,107 INFO L85 PathProgramCache]: Analyzing trace with hash 222777560, now seen corresponding path program 1 times [2024-06-27 20:24:40,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:24:40,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352765176] [2024-06-27 20:24:40,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:24:40,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:24:40,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:24:40,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:24:40,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:24:40,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352765176] [2024-06-27 20:24:40,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352765176] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:24:40,856 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:24:40,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:24:40,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527990034] [2024-06-27 20:24:40,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:24:40,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:24:40,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:24:40,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:24:40,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:24:40,921 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:24:40,921 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 468 transitions, 5364 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 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) [2024-06-27 20:24:40,921 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:24:40,921 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:24:40,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:24:42,442 INFO L124 PetriNetUnfolderBase]: 4540/6995 cut-off events. [2024-06-27 20:24:42,442 INFO L125 PetriNetUnfolderBase]: For 777575/777575 co-relation queries the response was YES. [2024-06-27 20:24:42,512 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56850 conditions, 6995 events. 4540/6995 cut-off events. For 777575/777575 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 40057 event pairs, 1896 based on Foata normal form. 2/6996 useless extension candidates. Maximal degree in co-relation 56704. Up to 6890 conditions per place. [2024-06-27 20:24:42,541 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 466 selfloop transitions, 20 changer transitions 0/489 dead transitions. [2024-06-27 20:24:42,541 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 489 transitions, 6464 flow [2024-06-27 20:24:42,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:24:42,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:24:42,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-27 20:24:42,542 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-27 20:24:42,542 INFO L175 Difference]: Start difference. First operand has 333 places, 468 transitions, 5364 flow. Second operand 8 states and 128 transitions. [2024-06-27 20:24:42,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 489 transitions, 6464 flow [2024-06-27 20:24:44,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 489 transitions, 6329 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-06-27 20:24:44,178 INFO L231 Difference]: Finished difference. Result has 333 places, 471 transitions, 5331 flow [2024-06-27 20:24:44,179 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5229, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=468, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=448, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5331, PETRI_PLACES=333, PETRI_TRANSITIONS=471} [2024-06-27 20:24:44,179 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 290 predicate places. [2024-06-27 20:24:44,179 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 471 transitions, 5331 flow [2024-06-27 20:24:44,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 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) [2024-06-27 20:24:44,179 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:24:44,179 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:24:44,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-27 20:24:44,179 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:24:44,179 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:24:44,180 INFO L85 PathProgramCache]: Analyzing trace with hash -1067684137, now seen corresponding path program 1 times [2024-06-27 20:24:44,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:24:44,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550182294] [2024-06-27 20:24:44,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:24:44,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:24:44,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:24:44,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:24:44,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:24:44,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550182294] [2024-06-27 20:24:44,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550182294] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:24:44,934 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:24:44,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:24:44,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051919955] [2024-06-27 20:24:44,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:24:44,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:24:44,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:24:44,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:24:44,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:24:45,042 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:24:45,042 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 471 transitions, 5331 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 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) [2024-06-27 20:24:45,042 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:24:45,042 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:24:45,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:24:46,629 INFO L124 PetriNetUnfolderBase]: 4555/7016 cut-off events. [2024-06-27 20:24:46,629 INFO L125 PetriNetUnfolderBase]: For 799208/799208 co-relation queries the response was YES. [2024-06-27 20:24:46,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57578 conditions, 7016 events. 4555/7016 cut-off events. For 799208/799208 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 40194 event pairs, 1893 based on Foata normal form. 3/7018 useless extension candidates. Maximal degree in co-relation 57431. Up to 6884 conditions per place. [2024-06-27 20:24:46,727 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 458 selfloop transitions, 35 changer transitions 0/496 dead transitions. [2024-06-27 20:24:46,727 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 496 transitions, 6643 flow [2024-06-27 20:24:46,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:24:46,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:24:46,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-27 20:24:46,728 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4017857142857143 [2024-06-27 20:24:46,728 INFO L175 Difference]: Start difference. First operand has 333 places, 471 transitions, 5331 flow. Second operand 8 states and 135 transitions. [2024-06-27 20:24:46,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 496 transitions, 6643 flow [2024-06-27 20:24:48,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 334 places, 496 transitions, 6563 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-27 20:24:48,334 INFO L231 Difference]: Finished difference. Result has 335 places, 477 transitions, 5429 flow [2024-06-27 20:24:48,334 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5251, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=471, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=439, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5429, PETRI_PLACES=335, PETRI_TRANSITIONS=477} [2024-06-27 20:24:48,334 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 292 predicate places. [2024-06-27 20:24:48,334 INFO L495 AbstractCegarLoop]: Abstraction has has 335 places, 477 transitions, 5429 flow [2024-06-27 20:24:48,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 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) [2024-06-27 20:24:48,335 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:24:48,335 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:24:48,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-27 20:24:48,335 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:24:48,335 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:24:48,335 INFO L85 PathProgramCache]: Analyzing trace with hash 2023314820, now seen corresponding path program 2 times [2024-06-27 20:24:48,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:24:48,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129215414] [2024-06-27 20:24:48,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:24:48,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:24:48,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:24:49,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:24:49,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:24:49,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129215414] [2024-06-27 20:24:49,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129215414] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:24:49,078 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:24:49,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:24:49,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862336024] [2024-06-27 20:24:49,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:24:49,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:24:49,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:24:49,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:24:49,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:24:49,161 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:24:49,161 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 335 places, 477 transitions, 5429 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 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) [2024-06-27 20:24:49,161 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:24:49,161 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:24:49,161 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:24:50,923 INFO L124 PetriNetUnfolderBase]: 4581/7052 cut-off events. [2024-06-27 20:24:50,923 INFO L125 PetriNetUnfolderBase]: For 824123/824123 co-relation queries the response was YES. [2024-06-27 20:24:50,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58619 conditions, 7052 events. 4581/7052 cut-off events. For 824123/824123 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 40426 event pairs, 1891 based on Foata normal form. 2/7053 useless extension candidates. Maximal degree in co-relation 58471. Up to 6882 conditions per place. [2024-06-27 20:24:51,013 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 455 selfloop transitions, 47 changer transitions 0/505 dead transitions. [2024-06-27 20:24:51,013 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 505 transitions, 6999 flow [2024-06-27 20:24:51,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:24:51,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:24:51,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-27 20:24:51,014 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4017857142857143 [2024-06-27 20:24:51,014 INFO L175 Difference]: Start difference. First operand has 335 places, 477 transitions, 5429 flow. Second operand 8 states and 135 transitions. [2024-06-27 20:24:51,014 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 505 transitions, 6999 flow [2024-06-27 20:24:52,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 505 transitions, 6924 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-06-27 20:24:52,627 INFO L231 Difference]: Finished difference. Result has 339 places, 486 transitions, 5634 flow [2024-06-27 20:24:52,627 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5354, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=477, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=436, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5634, PETRI_PLACES=339, PETRI_TRANSITIONS=486} [2024-06-27 20:24:52,627 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 296 predicate places. [2024-06-27 20:24:52,627 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 486 transitions, 5634 flow [2024-06-27 20:24:52,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 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) [2024-06-27 20:24:52,627 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:24:52,628 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:24:52,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-27 20:24:52,628 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:24:52,628 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:24:52,628 INFO L85 PathProgramCache]: Analyzing trace with hash 226496630, now seen corresponding path program 3 times [2024-06-27 20:24:52,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:24:52,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121718606] [2024-06-27 20:24:52,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:24:52,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:24:52,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:24:53,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:24:53,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:24:53,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121718606] [2024-06-27 20:24:53,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121718606] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:24:53,354 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:24:53,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:24:53,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724574842] [2024-06-27 20:24:53,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:24:53,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:24:53,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:24:53,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:24:53,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:24:53,433 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:24:53,434 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 486 transitions, 5634 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 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) [2024-06-27 20:24:53,434 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:24:53,434 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:24:53,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:24:55,005 INFO L124 PetriNetUnfolderBase]: 4575/7044 cut-off events. [2024-06-27 20:24:55,005 INFO L125 PetriNetUnfolderBase]: For 838981/838981 co-relation queries the response was YES. [2024-06-27 20:24:55,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58984 conditions, 7044 events. 4575/7044 cut-off events. For 838981/838981 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 40376 event pairs, 1876 based on Foata normal form. 2/7045 useless extension candidates. Maximal degree in co-relation 58834. Up to 6877 conditions per place. [2024-06-27 20:24:55,105 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 455 selfloop transitions, 46 changer transitions 0/504 dead transitions. [2024-06-27 20:24:55,106 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 504 transitions, 6868 flow [2024-06-27 20:24:55,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:24:55,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:24:55,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-27 20:24:55,106 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4017857142857143 [2024-06-27 20:24:55,106 INFO L175 Difference]: Start difference. First operand has 339 places, 486 transitions, 5634 flow. Second operand 8 states and 135 transitions. [2024-06-27 20:24:55,106 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 504 transitions, 6868 flow [2024-06-27 20:24:56,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 504 transitions, 6750 flow, removed 48 selfloop flow, removed 3 redundant places. [2024-06-27 20:24:56,952 INFO L231 Difference]: Finished difference. Result has 344 places, 486 transitions, 5614 flow [2024-06-27 20:24:56,952 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5516, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=486, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=440, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5614, PETRI_PLACES=344, PETRI_TRANSITIONS=486} [2024-06-27 20:24:56,953 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 301 predicate places. [2024-06-27 20:24:56,953 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 486 transitions, 5614 flow [2024-06-27 20:24:56,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 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) [2024-06-27 20:24:56,953 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:24:56,953 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:24:56,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-27 20:24:56,953 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:24:56,953 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:24:56,953 INFO L85 PathProgramCache]: Analyzing trace with hash -356385564, now seen corresponding path program 4 times [2024-06-27 20:24:56,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:24:56,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125661442] [2024-06-27 20:24:56,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:24:56,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:24:56,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:24:57,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:24:57,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:24:57,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125661442] [2024-06-27 20:24:57,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125661442] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:24:57,688 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:24:57,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:24:57,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553442808] [2024-06-27 20:24:57,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:24:57,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:24:57,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:24:57,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:24:57,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:24:57,756 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:24:57,757 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 486 transitions, 5614 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 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) [2024-06-27 20:24:57,757 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:24:57,757 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:24:57,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:24:59,397 INFO L124 PetriNetUnfolderBase]: 4601/7081 cut-off events. [2024-06-27 20:24:59,398 INFO L125 PetriNetUnfolderBase]: For 865625/865627 co-relation queries the response was YES. [2024-06-27 20:24:59,472 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59693 conditions, 7081 events. 4601/7081 cut-off events. For 865625/865627 co-relation queries the response was YES. Maximal size of possible extension queue 325. Compared 40622 event pairs, 1903 based on Foata normal form. 2/7082 useless extension candidates. Maximal degree in co-relation 59541. Up to 6902 conditions per place. [2024-06-27 20:24:59,503 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 453 selfloop transitions, 52 changer transitions 0/508 dead transitions. [2024-06-27 20:24:59,503 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 508 transitions, 7138 flow [2024-06-27 20:24:59,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:24:59,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:24:59,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-27 20:24:59,504 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39880952380952384 [2024-06-27 20:24:59,504 INFO L175 Difference]: Start difference. First operand has 344 places, 486 transitions, 5614 flow. Second operand 8 states and 134 transitions. [2024-06-27 20:24:59,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 508 transitions, 7138 flow [2024-06-27 20:25:01,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 508 transitions, 7040 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-27 20:25:01,156 INFO L231 Difference]: Finished difference. Result has 346 places, 492 transitions, 5758 flow [2024-06-27 20:25:01,156 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5522, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=486, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=440, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5758, PETRI_PLACES=346, PETRI_TRANSITIONS=492} [2024-06-27 20:25:01,156 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 303 predicate places. [2024-06-27 20:25:01,157 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 492 transitions, 5758 flow [2024-06-27 20:25:01,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 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) [2024-06-27 20:25:01,157 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:25:01,157 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:25:01,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-27 20:25:01,157 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:25:01,158 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:25:01,158 INFO L85 PathProgramCache]: Analyzing trace with hash -2064998819, now seen corresponding path program 2 times [2024-06-27 20:25:01,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:25:01,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592446407] [2024-06-27 20:25:01,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:25:01,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:25:01,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:25:01,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:25:01,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:25:01,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592446407] [2024-06-27 20:25:01,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592446407] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:25:01,888 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:25:01,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:25:01,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889591560] [2024-06-27 20:25:01,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:25:01,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:25:01,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:25:01,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:25:01,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:25:01,960 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:25:01,961 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 492 transitions, 5758 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 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) [2024-06-27 20:25:01,961 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:25:01,961 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:25:01,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:25:03,622 INFO L124 PetriNetUnfolderBase]: 4640/7135 cut-off events. [2024-06-27 20:25:03,622 INFO L125 PetriNetUnfolderBase]: For 900640/900642 co-relation queries the response was YES. [2024-06-27 20:25:03,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60541 conditions, 7135 events. 4640/7135 cut-off events. For 900640/900642 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 40905 event pairs, 1899 based on Foata normal form. 5/7139 useless extension candidates. Maximal degree in co-relation 60388. Up to 6983 conditions per place. [2024-06-27 20:25:03,727 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 471 selfloop transitions, 42 changer transitions 0/516 dead transitions. [2024-06-27 20:25:03,727 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 516 transitions, 7266 flow [2024-06-27 20:25:03,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:25:03,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:25:03,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-27 20:25:03,728 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-27 20:25:03,728 INFO L175 Difference]: Start difference. First operand has 346 places, 492 transitions, 5758 flow. Second operand 8 states and 132 transitions. [2024-06-27 20:25:03,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 516 transitions, 7266 flow [2024-06-27 20:25:05,678 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 516 transitions, 7068 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-27 20:25:05,684 INFO L231 Difference]: Finished difference. Result has 348 places, 498 transitions, 5738 flow [2024-06-27 20:25:05,684 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5560, PETRI_DIFFERENCE_MINUEND_PLACES=340, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=492, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=456, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5738, PETRI_PLACES=348, PETRI_TRANSITIONS=498} [2024-06-27 20:25:05,684 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 305 predicate places. [2024-06-27 20:25:05,684 INFO L495 AbstractCegarLoop]: Abstraction has has 348 places, 498 transitions, 5738 flow [2024-06-27 20:25:05,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 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) [2024-06-27 20:25:05,685 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:25:05,685 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:25:05,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-27 20:25:05,685 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:25:05,685 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:25:05,685 INFO L85 PathProgramCache]: Analyzing trace with hash -2064731909, now seen corresponding path program 3 times [2024-06-27 20:25:05,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:25:05,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415540284] [2024-06-27 20:25:05,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:25:05,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:25:05,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:25:06,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:25:06,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:25:06,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415540284] [2024-06-27 20:25:06,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415540284] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:25:06,433 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:25:06,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:25:06,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532759724] [2024-06-27 20:25:06,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:25:06,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:25:06,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:25:06,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:25:06,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:25:06,503 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:25:06,503 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 498 transitions, 5738 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 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) [2024-06-27 20:25:06,504 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:25:06,504 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:25:06,504 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:25:08,272 INFO L124 PetriNetUnfolderBase]: 4631/7123 cut-off events. [2024-06-27 20:25:08,272 INFO L125 PetriNetUnfolderBase]: For 908595/908597 co-relation queries the response was YES. [2024-06-27 20:25:08,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60325 conditions, 7123 events. 4631/7123 cut-off events. For 908595/908597 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 40835 event pairs, 1892 based on Foata normal form. 5/7127 useless extension candidates. Maximal degree in co-relation 60171. Up to 6976 conditions per place. [2024-06-27 20:25:08,366 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 466 selfloop transitions, 44 changer transitions 0/513 dead transitions. [2024-06-27 20:25:08,367 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 513 transitions, 6978 flow [2024-06-27 20:25:08,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:25:08,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:25:08,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-27 20:25:08,367 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-27 20:25:08,368 INFO L175 Difference]: Start difference. First operand has 348 places, 498 transitions, 5738 flow. Second operand 8 states and 128 transitions. [2024-06-27 20:25:08,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 513 transitions, 6978 flow [2024-06-27 20:25:10,233 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 513 transitions, 6859 flow, removed 34 selfloop flow, removed 4 redundant places. [2024-06-27 20:25:10,239 INFO L231 Difference]: Finished difference. Result has 352 places, 498 transitions, 5714 flow [2024-06-27 20:25:10,239 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5619, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=498, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=454, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5714, PETRI_PLACES=352, PETRI_TRANSITIONS=498} [2024-06-27 20:25:10,239 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 309 predicate places. [2024-06-27 20:25:10,239 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 498 transitions, 5714 flow [2024-06-27 20:25:10,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 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) [2024-06-27 20:25:10,240 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:25:10,240 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:25:10,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-27 20:25:10,240 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:25:10,240 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:25:10,240 INFO L85 PathProgramCache]: Analyzing trace with hash -2064999036, now seen corresponding path program 5 times [2024-06-27 20:25:10,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:25:10,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389209207] [2024-06-27 20:25:10,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:25:10,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:25:10,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:25:10,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:25:10,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:25:10,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389209207] [2024-06-27 20:25:10,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389209207] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:25:10,968 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:25:10,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:25:10,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315325822] [2024-06-27 20:25:10,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:25:10,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:25:10,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:25:10,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:25:10,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:25:11,044 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:25:11,044 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 498 transitions, 5714 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 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) [2024-06-27 20:25:11,044 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:25:11,044 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:25:11,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:25:12,714 INFO L124 PetriNetUnfolderBase]: 4625/7115 cut-off events. [2024-06-27 20:25:12,714 INFO L125 PetriNetUnfolderBase]: For 916805/916807 co-relation queries the response was YES. [2024-06-27 20:25:12,788 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60169 conditions, 7115 events. 4625/7115 cut-off events. For 916805/916807 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 40805 event pairs, 1900 based on Foata normal form. 2/7116 useless extension candidates. Maximal degree in co-relation 60014. Up to 6939 conditions per place. [2024-06-27 20:25:12,817 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 454 selfloop transitions, 55 changer transitions 0/512 dead transitions. [2024-06-27 20:25:12,817 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 512 transitions, 6950 flow [2024-06-27 20:25:12,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:25:12,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:25:12,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-27 20:25:12,818 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3869047619047619 [2024-06-27 20:25:12,818 INFO L175 Difference]: Start difference. First operand has 352 places, 498 transitions, 5714 flow. Second operand 8 states and 130 transitions. [2024-06-27 20:25:12,818 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 512 transitions, 6950 flow [2024-06-27 20:25:15,071 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 353 places, 512 transitions, 6838 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-27 20:25:15,078 INFO L231 Difference]: Finished difference. Result has 354 places, 498 transitions, 5718 flow [2024-06-27 20:25:15,079 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5602, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=498, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=443, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5718, PETRI_PLACES=354, PETRI_TRANSITIONS=498} [2024-06-27 20:25:15,079 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 311 predicate places. [2024-06-27 20:25:15,080 INFO L495 AbstractCegarLoop]: Abstraction has has 354 places, 498 transitions, 5718 flow [2024-06-27 20:25:15,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 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) [2024-06-27 20:25:15,080 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:25:15,080 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:25:15,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-27 20:25:15,080 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:25:15,081 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:25:15,081 INFO L85 PathProgramCache]: Analyzing trace with hash -66708812, now seen corresponding path program 6 times [2024-06-27 20:25:15,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:25:15,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077215533] [2024-06-27 20:25:15,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:25:15,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:25:15,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:25:15,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:25:15,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:25:15,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077215533] [2024-06-27 20:25:15,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077215533] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:25:15,822 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:25:15,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:25:15,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626757674] [2024-06-27 20:25:15,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:25:15,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:25:15,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:25:15,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:25:15,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:25:15,899 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:25:15,899 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 498 transitions, 5718 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 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) [2024-06-27 20:25:15,899 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:25:15,899 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:25:15,899 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:25:17,529 INFO L124 PetriNetUnfolderBase]: 4619/7107 cut-off events. [2024-06-27 20:25:17,529 INFO L125 PetriNetUnfolderBase]: For 929294/929296 co-relation queries the response was YES. [2024-06-27 20:25:17,603 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60137 conditions, 7107 events. 4619/7107 cut-off events. For 929294/929296 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 40777 event pairs, 1907 based on Foata normal form. 2/7108 useless extension candidates. Maximal degree in co-relation 59981. Up to 6934 conditions per place. [2024-06-27 20:25:17,632 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 455 selfloop transitions, 53 changer transitions 0/511 dead transitions. [2024-06-27 20:25:17,632 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 511 transitions, 6780 flow [2024-06-27 20:25:17,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:25:17,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:25:17,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-27 20:25:17,633 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3869047619047619 [2024-06-27 20:25:17,633 INFO L175 Difference]: Start difference. First operand has 354 places, 498 transitions, 5718 flow. Second operand 8 states and 130 transitions. [2024-06-27 20:25:17,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 511 transitions, 6780 flow [2024-06-27 20:25:19,694 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 354 places, 511 transitions, 6620 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-06-27 20:25:19,700 INFO L231 Difference]: Finished difference. Result has 355 places, 498 transitions, 5670 flow [2024-06-27 20:25:19,700 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5558, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=498, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=445, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5670, PETRI_PLACES=355, PETRI_TRANSITIONS=498} [2024-06-27 20:25:19,701 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 312 predicate places. [2024-06-27 20:25:19,701 INFO L495 AbstractCegarLoop]: Abstraction has has 355 places, 498 transitions, 5670 flow [2024-06-27 20:25:19,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 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) [2024-06-27 20:25:19,701 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:25:19,701 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:25:19,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-27 20:25:19,701 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:25:19,702 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:25:19,702 INFO L85 PathProgramCache]: Analyzing trace with hash -2072350469, now seen corresponding path program 4 times [2024-06-27 20:25:19,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:25:19,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779017882] [2024-06-27 20:25:19,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:25:19,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:25:19,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:25:20,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:25:20,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:25:20,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779017882] [2024-06-27 20:25:20,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779017882] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:25:20,461 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:25:20,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:25:20,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123304334] [2024-06-27 20:25:20,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:25:20,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:25:20,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:25:20,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:25:20,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:25:20,540 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:25:20,544 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 355 places, 498 transitions, 5670 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 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) [2024-06-27 20:25:20,544 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:25:20,544 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:25:20,544 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:25:22,187 INFO L124 PetriNetUnfolderBase]: 4610/7095 cut-off events. [2024-06-27 20:25:22,187 INFO L125 PetriNetUnfolderBase]: For 941151/941153 co-relation queries the response was YES. [2024-06-27 20:25:22,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59979 conditions, 7095 events. 4610/7095 cut-off events. For 941151/941153 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 40743 event pairs, 1893 based on Foata normal form. 5/7099 useless extension candidates. Maximal degree in co-relation 59822. Up to 6953 conditions per place. [2024-06-27 20:25:22,294 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 470 selfloop transitions, 41 changer transitions 0/514 dead transitions. [2024-06-27 20:25:22,295 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 514 transitions, 6750 flow [2024-06-27 20:25:22,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:25:22,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:25:22,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-27 20:25:22,297 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3898809523809524 [2024-06-27 20:25:22,297 INFO L175 Difference]: Start difference. First operand has 355 places, 498 transitions, 5670 flow. Second operand 8 states and 131 transitions. [2024-06-27 20:25:22,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 514 transitions, 6750 flow [2024-06-27 20:25:24,379 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 514 transitions, 6614 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-27 20:25:24,386 INFO L231 Difference]: Finished difference. Result has 356 places, 498 transitions, 5622 flow [2024-06-27 20:25:24,386 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5534, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=498, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=457, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5622, PETRI_PLACES=356, PETRI_TRANSITIONS=498} [2024-06-27 20:25:24,387 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 313 predicate places. [2024-06-27 20:25:24,387 INFO L495 AbstractCegarLoop]: Abstraction has has 356 places, 498 transitions, 5622 flow [2024-06-27 20:25:24,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 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) [2024-06-27 20:25:24,387 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:25:24,387 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:25:24,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-27 20:25:24,387 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:25:24,388 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:25:24,388 INFO L85 PathProgramCache]: Analyzing trace with hash 1404946013, now seen corresponding path program 1 times [2024-06-27 20:25:24,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:25:24,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536747156] [2024-06-27 20:25:24,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:25:24,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:25:24,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:25:25,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:25:25,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:25:25,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536747156] [2024-06-27 20:25:25,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536747156] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:25:25,114 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:25:25,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:25:25,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808156056] [2024-06-27 20:25:25,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:25:25,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:25:25,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:25:25,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:25:25,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:25:25,310 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:25:25,310 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 356 places, 498 transitions, 5622 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:25:25,310 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:25:25,310 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:25:25,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:25:26,907 INFO L124 PetriNetUnfolderBase]: 4526/7017 cut-off events. [2024-06-27 20:25:26,907 INFO L125 PetriNetUnfolderBase]: For 971557/971572 co-relation queries the response was YES. [2024-06-27 20:25:26,978 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60038 conditions, 7017 events. 4526/7017 cut-off events. For 971557/971572 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 40466 event pairs, 1376 based on Foata normal form. 8/7011 useless extension candidates. Maximal degree in co-relation 59880. Up to 6572 conditions per place. [2024-06-27 20:25:27,007 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 429 selfloop transitions, 89 changer transitions 0/536 dead transitions. [2024-06-27 20:25:27,008 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 536 transitions, 7056 flow [2024-06-27 20:25:27,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:25:27,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:25:27,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-27 20:25:27,009 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43386243386243384 [2024-06-27 20:25:27,009 INFO L175 Difference]: Start difference. First operand has 356 places, 498 transitions, 5622 flow. Second operand 9 states and 164 transitions. [2024-06-27 20:25:27,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 536 transitions, 7056 flow [2024-06-27 20:25:29,081 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 536 transitions, 6917 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-27 20:25:29,087 INFO L231 Difference]: Finished difference. Result has 358 places, 505 transitions, 5800 flow [2024-06-27 20:25:29,087 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5483, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=498, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=412, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5800, PETRI_PLACES=358, PETRI_TRANSITIONS=505} [2024-06-27 20:25:29,087 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 315 predicate places. [2024-06-27 20:25:29,087 INFO L495 AbstractCegarLoop]: Abstraction has has 358 places, 505 transitions, 5800 flow [2024-06-27 20:25:29,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:25:29,087 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:25:29,087 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:25:29,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-27 20:25:29,088 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:25:29,088 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:25:29,088 INFO L85 PathProgramCache]: Analyzing trace with hash 55072277, now seen corresponding path program 2 times [2024-06-27 20:25:29,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:25:29,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302939824] [2024-06-27 20:25:29,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:25:29,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:25:29,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:25:29,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:25:29,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:25:29,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302939824] [2024-06-27 20:25:29,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302939824] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:25:29,884 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:25:29,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:25:29,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248404876] [2024-06-27 20:25:29,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:25:29,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:25:29,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:25:29,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:25:29,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:25:29,993 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:25:29,994 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 358 places, 505 transitions, 5800 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:25:29,994 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:25:29,994 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:25:29,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:25:31,769 INFO L124 PetriNetUnfolderBase]: 4580/7103 cut-off events. [2024-06-27 20:25:31,769 INFO L125 PetriNetUnfolderBase]: For 996008/996023 co-relation queries the response was YES. [2024-06-27 20:25:31,834 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61408 conditions, 7103 events. 4580/7103 cut-off events. For 996008/996023 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 41451 event pairs, 1535 based on Foata normal form. 8/7097 useless extension candidates. Maximal degree in co-relation 61247. Up to 6695 conditions per place. [2024-06-27 20:25:31,861 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 434 selfloop transitions, 95 changer transitions 0/547 dead transitions. [2024-06-27 20:25:31,861 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 547 transitions, 7354 flow [2024-06-27 20:25:31,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:25:31,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:25:31,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-27 20:25:31,862 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4417989417989418 [2024-06-27 20:25:31,862 INFO L175 Difference]: Start difference. First operand has 358 places, 505 transitions, 5800 flow. Second operand 9 states and 167 transitions. [2024-06-27 20:25:31,862 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 547 transitions, 7354 flow [2024-06-27 20:25:34,384 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 547 transitions, 7110 flow, removed 76 selfloop flow, removed 5 redundant places. [2024-06-27 20:25:34,390 INFO L231 Difference]: Finished difference. Result has 363 places, 515 transitions, 5962 flow [2024-06-27 20:25:34,391 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5638, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=505, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=412, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5962, PETRI_PLACES=363, PETRI_TRANSITIONS=515} [2024-06-27 20:25:34,391 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 320 predicate places. [2024-06-27 20:25:34,391 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 515 transitions, 5962 flow [2024-06-27 20:25:34,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:25:34,392 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:25:34,392 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:25:34,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-27 20:25:34,392 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:25:34,392 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:25:34,392 INFO L85 PathProgramCache]: Analyzing trace with hash 55587807, now seen corresponding path program 1 times [2024-06-27 20:25:34,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:25:34,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362507901] [2024-06-27 20:25:34,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:25:34,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:25:34,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:25:35,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:25:35,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:25:35,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362507901] [2024-06-27 20:25:35,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362507901] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:25:35,155 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:25:35,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:25:35,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321816266] [2024-06-27 20:25:35,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:25:35,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:25:35,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:25:35,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:25:35,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:25:35,287 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:25:35,288 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 515 transitions, 5962 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 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) [2024-06-27 20:25:35,288 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:25:35,288 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:25:35,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:25:36,972 INFO L124 PetriNetUnfolderBase]: 4704/7238 cut-off events. [2024-06-27 20:25:36,972 INFO L125 PetriNetUnfolderBase]: For 1004975/1004977 co-relation queries the response was YES. [2024-06-27 20:25:37,050 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62264 conditions, 7238 events. 4704/7238 cut-off events. For 1004975/1004977 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 41713 event pairs, 1590 based on Foata normal form. 3/7240 useless extension candidates. Maximal degree in co-relation 62101. Up to 6940 conditions per place. [2024-06-27 20:25:37,080 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 455 selfloop transitions, 101 changer transitions 0/559 dead transitions. [2024-06-27 20:25:37,080 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 559 transitions, 7587 flow [2024-06-27 20:25:37,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:25:37,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:25:37,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-27 20:25:37,081 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41798941798941797 [2024-06-27 20:25:37,081 INFO L175 Difference]: Start difference. First operand has 363 places, 515 transitions, 5962 flow. Second operand 9 states and 158 transitions. [2024-06-27 20:25:37,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 559 transitions, 7587 flow [2024-06-27 20:25:39,672 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 559 transitions, 7470 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-27 20:25:39,679 INFO L231 Difference]: Finished difference. Result has 368 places, 532 transitions, 6297 flow [2024-06-27 20:25:39,679 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5845, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=515, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=427, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6297, PETRI_PLACES=368, PETRI_TRANSITIONS=532} [2024-06-27 20:25:39,679 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 325 predicate places. [2024-06-27 20:25:39,679 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 532 transitions, 6297 flow [2024-06-27 20:25:39,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 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) [2024-06-27 20:25:39,679 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:25:39,679 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:25:39,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-27 20:25:39,680 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:25:39,680 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:25:39,680 INFO L85 PathProgramCache]: Analyzing trace with hash 856841929, now seen corresponding path program 3 times [2024-06-27 20:25:39,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:25:39,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46180553] [2024-06-27 20:25:39,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:25:39,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:25:39,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:25:40,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:25:40,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:25:40,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46180553] [2024-06-27 20:25:40,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46180553] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:25:40,492 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:25:40,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:25:40,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126152502] [2024-06-27 20:25:40,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:25:40,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:25:40,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:25:40,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:25:40,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:25:40,594 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:25:40,595 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 532 transitions, 6297 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:25:40,595 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:25:40,595 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:25:40,595 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:25:42,274 INFO L124 PetriNetUnfolderBase]: 4608/7140 cut-off events. [2024-06-27 20:25:42,274 INFO L125 PetriNetUnfolderBase]: For 1032982/1032985 co-relation queries the response was YES. [2024-06-27 20:25:42,352 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62854 conditions, 7140 events. 4608/7140 cut-off events. For 1032982/1032985 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 41624 event pairs, 1530 based on Foata normal form. 4/7137 useless extension candidates. Maximal degree in co-relation 62688. Up to 6773 conditions per place. [2024-06-27 20:25:42,381 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 442 selfloop transitions, 91 changer transitions 0/558 dead transitions. [2024-06-27 20:25:42,381 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 558 transitions, 7481 flow [2024-06-27 20:25:42,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:25:42,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:25:42,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-27 20:25:42,382 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42592592592592593 [2024-06-27 20:25:42,382 INFO L175 Difference]: Start difference. First operand has 368 places, 532 transitions, 6297 flow. Second operand 9 states and 161 transitions. [2024-06-27 20:25:42,382 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 558 transitions, 7481 flow [2024-06-27 20:25:44,578 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 372 places, 558 transitions, 7367 flow, removed 34 selfloop flow, removed 4 redundant places. [2024-06-27 20:25:44,584 INFO L231 Difference]: Finished difference. Result has 373 places, 532 transitions, 6373 flow [2024-06-27 20:25:44,584 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6183, PETRI_DIFFERENCE_MINUEND_PLACES=364, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=532, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=441, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6373, PETRI_PLACES=373, PETRI_TRANSITIONS=532} [2024-06-27 20:25:44,584 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 330 predicate places. [2024-06-27 20:25:44,584 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 532 transitions, 6373 flow [2024-06-27 20:25:44,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:25:44,584 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:25:44,584 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:25:44,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-27 20:25:44,584 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:25:44,585 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:25:44,585 INFO L85 PathProgramCache]: Analyzing trace with hash -1143665155, now seen corresponding path program 1 times [2024-06-27 20:25:44,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:25:44,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356736891] [2024-06-27 20:25:44,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:25:44,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:25:44,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:25:45,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:25:45,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:25:45,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356736891] [2024-06-27 20:25:45,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356736891] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:25:45,230 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:25:45,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:25:45,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127849651] [2024-06-27 20:25:45,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:25:45,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:25:45,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:25:45,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:25:45,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:25:45,320 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:25:45,321 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 532 transitions, 6373 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 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) [2024-06-27 20:25:45,321 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:25:45,321 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:25:45,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:25:47,093 INFO L124 PetriNetUnfolderBase]: 4637/7181 cut-off events. [2024-06-27 20:25:47,093 INFO L125 PetriNetUnfolderBase]: For 1065164/1065167 co-relation queries the response was YES. [2024-06-27 20:25:47,169 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63928 conditions, 7181 events. 4637/7181 cut-off events. For 1065164/1065167 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 41900 event pairs, 1528 based on Foata normal form. 3/7177 useless extension candidates. Maximal degree in co-relation 63760. Up to 6831 conditions per place. [2024-06-27 20:25:47,198 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 478 selfloop transitions, 81 changer transitions 0/584 dead transitions. [2024-06-27 20:25:47,198 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 383 places, 584 transitions, 8526 flow [2024-06-27 20:25:47,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:25:47,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:25:47,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 198 transitions. [2024-06-27 20:25:47,199 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-27 20:25:47,199 INFO L175 Difference]: Start difference. First operand has 373 places, 532 transitions, 6373 flow. Second operand 11 states and 198 transitions. [2024-06-27 20:25:47,199 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 383 places, 584 transitions, 8526 flow [2024-06-27 20:25:49,379 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 376 places, 584 transitions, 8348 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-27 20:25:49,385 INFO L231 Difference]: Finished difference. Result has 378 places, 549 transitions, 6733 flow [2024-06-27 20:25:49,385 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6195, PETRI_DIFFERENCE_MINUEND_PLACES=366, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=532, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=463, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6733, PETRI_PLACES=378, PETRI_TRANSITIONS=549} [2024-06-27 20:25:49,386 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 335 predicate places. [2024-06-27 20:25:49,386 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 549 transitions, 6733 flow [2024-06-27 20:25:49,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 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) [2024-06-27 20:25:49,386 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:25:49,386 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:25:49,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-27 20:25:49,386 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:25:49,386 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:25:49,386 INFO L85 PathProgramCache]: Analyzing trace with hash -751702915, now seen corresponding path program 2 times [2024-06-27 20:25:49,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:25:49,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527773490] [2024-06-27 20:25:49,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:25:49,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:25:49,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:25:50,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:25:50,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:25:50,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527773490] [2024-06-27 20:25:50,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527773490] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:25:50,070 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:25:50,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:25:50,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419947061] [2024-06-27 20:25:50,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:25:50,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:25:50,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:25:50,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:25:50,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:25:50,177 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:25:50,177 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 549 transitions, 6733 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 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) [2024-06-27 20:25:50,178 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:25:50,178 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:25:50,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:25:52,189 INFO L124 PetriNetUnfolderBase]: 4634/7177 cut-off events. [2024-06-27 20:25:52,189 INFO L125 PetriNetUnfolderBase]: For 1085900/1085903 co-relation queries the response was YES. [2024-06-27 20:25:52,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64445 conditions, 7177 events. 4634/7177 cut-off events. For 1085900/1085903 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 41863 event pairs, 1525 based on Foata normal form. 3/7173 useless extension candidates. Maximal degree in co-relation 64275. Up to 6828 conditions per place. [2024-06-27 20:25:52,299 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 473 selfloop transitions, 85 changer transitions 0/583 dead transitions. [2024-06-27 20:25:52,299 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 583 transitions, 8357 flow [2024-06-27 20:25:52,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 20:25:52,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 20:25:52,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 206 transitions. [2024-06-27 20:25:52,300 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4087301587301587 [2024-06-27 20:25:52,300 INFO L175 Difference]: Start difference. First operand has 378 places, 549 transitions, 6733 flow. Second operand 12 states and 206 transitions. [2024-06-27 20:25:52,300 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 583 transitions, 8357 flow [2024-06-27 20:25:54,851 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 385 places, 583 transitions, 8120 flow, removed 102 selfloop flow, removed 4 redundant places. [2024-06-27 20:25:54,857 INFO L231 Difference]: Finished difference. Result has 386 places, 549 transitions, 6673 flow [2024-06-27 20:25:54,858 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6496, PETRI_DIFFERENCE_MINUEND_PLACES=374, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=549, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=464, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6673, PETRI_PLACES=386, PETRI_TRANSITIONS=549} [2024-06-27 20:25:54,858 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 343 predicate places. [2024-06-27 20:25:54,858 INFO L495 AbstractCegarLoop]: Abstraction has has 386 places, 549 transitions, 6673 flow [2024-06-27 20:25:54,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 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) [2024-06-27 20:25:54,858 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:25:54,858 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:25:54,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-27 20:25:54,858 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:25:54,858 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:25:54,858 INFO L85 PathProgramCache]: Analyzing trace with hash 851802875, now seen corresponding path program 3 times [2024-06-27 20:25:54,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:25:54,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247117277] [2024-06-27 20:25:54,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:25:54,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:25:54,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:25:55,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:25:55,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:25:55,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247117277] [2024-06-27 20:25:55,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247117277] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:25:55,566 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:25:55,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:25:55,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925778626] [2024-06-27 20:25:55,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:25:55,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:25:55,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:25:55,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:25:55,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:25:55,670 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:25:55,670 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 386 places, 549 transitions, 6673 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 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) [2024-06-27 20:25:55,670 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:25:55,670 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:25:55,670 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:25:57,465 INFO L124 PetriNetUnfolderBase]: 4657/7209 cut-off events. [2024-06-27 20:25:57,466 INFO L125 PetriNetUnfolderBase]: For 1109473/1109475 co-relation queries the response was YES. [2024-06-27 20:25:57,536 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64721 conditions, 7209 events. 4657/7209 cut-off events. For 1109473/1109475 co-relation queries the response was YES. Maximal size of possible extension queue 356. Compared 42056 event pairs, 1399 based on Foata normal form. 4/7212 useless extension candidates. Maximal degree in co-relation 64550. Up to 6894 conditions per place. [2024-06-27 20:25:57,562 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 489 selfloop transitions, 75 changer transitions 0/589 dead transitions. [2024-06-27 20:25:57,562 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 394 places, 589 transitions, 8285 flow [2024-06-27 20:25:57,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:25:57,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:25:57,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-27 20:25:57,563 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43386243386243384 [2024-06-27 20:25:57,563 INFO L175 Difference]: Start difference. First operand has 386 places, 549 transitions, 6673 flow. Second operand 9 states and 164 transitions. [2024-06-27 20:25:57,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 394 places, 589 transitions, 8285 flow [2024-06-27 20:26:00,447 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 385 places, 589 transitions, 8084 flow, removed 10 selfloop flow, removed 9 redundant places. [2024-06-27 20:26:00,454 INFO L231 Difference]: Finished difference. Result has 387 places, 564 transitions, 6884 flow [2024-06-27 20:26:00,455 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6506, PETRI_DIFFERENCE_MINUEND_PLACES=377, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=549, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=477, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6884, PETRI_PLACES=387, PETRI_TRANSITIONS=564} [2024-06-27 20:26:00,455 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 344 predicate places. [2024-06-27 20:26:00,455 INFO L495 AbstractCegarLoop]: Abstraction has has 387 places, 564 transitions, 6884 flow [2024-06-27 20:26:00,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 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) [2024-06-27 20:26:00,456 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:26:00,456 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:26:00,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-27 20:26:00,456 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:26:00,456 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:26:00,456 INFO L85 PathProgramCache]: Analyzing trace with hash 571379045, now seen corresponding path program 4 times [2024-06-27 20:26:00,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:26:00,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565902106] [2024-06-27 20:26:00,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:26:00,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:26:00,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:26:01,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:26:01,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:26:01,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565902106] [2024-06-27 20:26:01,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565902106] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:26:01,276 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:26:01,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:26:01,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684906488] [2024-06-27 20:26:01,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:26:01,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:26:01,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:26:01,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:26:01,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:26:01,384 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:26:01,385 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 387 places, 564 transitions, 6884 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 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) [2024-06-27 20:26:01,385 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:26:01,385 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:26:01,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:26:03,380 INFO L124 PetriNetUnfolderBase]: 4662/7216 cut-off events. [2024-06-27 20:26:03,380 INFO L125 PetriNetUnfolderBase]: For 1127241/1127243 co-relation queries the response was YES. [2024-06-27 20:26:03,446 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65031 conditions, 7216 events. 4662/7216 cut-off events. For 1127241/1127243 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 42098 event pairs, 1398 based on Foata normal form. 3/7218 useless extension candidates. Maximal degree in co-relation 64858. Up to 6900 conditions per place. [2024-06-27 20:26:03,469 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 489 selfloop transitions, 80 changer transitions 0/594 dead transitions. [2024-06-27 20:26:03,469 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 397 places, 594 transitions, 8364 flow [2024-06-27 20:26:03,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:26:03,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:26:03,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 190 transitions. [2024-06-27 20:26:03,470 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41125541125541126 [2024-06-27 20:26:03,470 INFO L175 Difference]: Start difference. First operand has 387 places, 564 transitions, 6884 flow. Second operand 11 states and 190 transitions. [2024-06-27 20:26:03,470 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 397 places, 594 transitions, 8364 flow [2024-06-27 20:26:06,061 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 392 places, 594 transitions, 8243 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-06-27 20:26:06,067 INFO L231 Difference]: Finished difference. Result has 393 places, 567 transitions, 6989 flow [2024-06-27 20:26:06,068 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6763, PETRI_DIFFERENCE_MINUEND_PLACES=382, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=564, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=487, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6989, PETRI_PLACES=393, PETRI_TRANSITIONS=567} [2024-06-27 20:26:06,068 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 350 predicate places. [2024-06-27 20:26:06,068 INFO L495 AbstractCegarLoop]: Abstraction has has 393 places, 567 transitions, 6989 flow [2024-06-27 20:26:06,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 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) [2024-06-27 20:26:06,069 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:26:06,069 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:26:06,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-27 20:26:06,069 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:26:06,069 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:26:06,069 INFO L85 PathProgramCache]: Analyzing trace with hash -453011851, now seen corresponding path program 1 times [2024-06-27 20:26:06,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:26:06,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238800231] [2024-06-27 20:26:06,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:26:06,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:26:06,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:26:06,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:26:06,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:26:06,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238800231] [2024-06-27 20:26:06,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238800231] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:26:06,811 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:26:06,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:26:06,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901757059] [2024-06-27 20:26:06,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:26:06,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:26:06,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:26:06,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:26:06,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:26:06,930 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:26:06,930 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 393 places, 567 transitions, 6989 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 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) [2024-06-27 20:26:06,930 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:26:06,931 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:26:06,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:26:08,706 INFO L124 PetriNetUnfolderBase]: 4693/7251 cut-off events. [2024-06-27 20:26:08,706 INFO L125 PetriNetUnfolderBase]: For 1154894/1154898 co-relation queries the response was YES. [2024-06-27 20:26:08,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65746 conditions, 7251 events. 4693/7251 cut-off events. For 1154894/1154898 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 42149 event pairs, 1432 based on Foata normal form. 4/7254 useless extension candidates. Maximal degree in co-relation 65571. Up to 6916 conditions per place. [2024-06-27 20:26:08,817 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 538 selfloop transitions, 52 changer transitions 0/615 dead transitions. [2024-06-27 20:26:08,817 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 401 places, 615 transitions, 8564 flow [2024-06-27 20:26:08,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:26:08,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:26:08,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-27 20:26:08,818 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43386243386243384 [2024-06-27 20:26:08,818 INFO L175 Difference]: Start difference. First operand has 393 places, 567 transitions, 6989 flow. Second operand 9 states and 164 transitions. [2024-06-27 20:26:08,818 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 401 places, 615 transitions, 8564 flow [2024-06-27 20:26:12,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 392 places, 615 transitions, 8372 flow, removed 16 selfloop flow, removed 9 redundant places. [2024-06-27 20:26:12,030 INFO L231 Difference]: Finished difference. Result has 395 places, 587 transitions, 7251 flow [2024-06-27 20:26:12,030 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6797, PETRI_DIFFERENCE_MINUEND_PLACES=384, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=567, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=518, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7251, PETRI_PLACES=395, PETRI_TRANSITIONS=587} [2024-06-27 20:26:12,030 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 352 predicate places. [2024-06-27 20:26:12,030 INFO L495 AbstractCegarLoop]: Abstraction has has 395 places, 587 transitions, 7251 flow [2024-06-27 20:26:12,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 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) [2024-06-27 20:26:12,031 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:26:12,031 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:26:12,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-27 20:26:12,031 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:26:12,031 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:26:12,031 INFO L85 PathProgramCache]: Analyzing trace with hash -1254454329, now seen corresponding path program 5 times [2024-06-27 20:26:12,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:26:12,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721104995] [2024-06-27 20:26:12,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:26:12,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:26:12,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:26:12,712 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:26:12,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:26:12,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721104995] [2024-06-27 20:26:12,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721104995] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:26:12,712 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:26:12,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:26:12,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719884864] [2024-06-27 20:26:12,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:26:12,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:26:12,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:26:12,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:26:12,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:26:12,801 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:26:12,801 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 395 places, 587 transitions, 7251 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 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) [2024-06-27 20:26:12,801 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:26:12,801 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:26:12,801 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:26:14,733 INFO L124 PetriNetUnfolderBase]: 4714/7280 cut-off events. [2024-06-27 20:26:14,733 INFO L125 PetriNetUnfolderBase]: For 1184366/1184372 co-relation queries the response was YES. [2024-06-27 20:26:14,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67381 conditions, 7280 events. 4714/7280 cut-off events. For 1184366/1184372 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 42320 event pairs, 1346 based on Foata normal form. 7/7286 useless extension candidates. Maximal degree in co-relation 67203. Up to 6783 conditions per place. [2024-06-27 20:26:14,838 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 462 selfloop transitions, 144 changer transitions 0/631 dead transitions. [2024-06-27 20:26:14,838 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 403 places, 631 transitions, 9702 flow [2024-06-27 20:26:14,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:26:14,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:26:14,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-27 20:26:14,839 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4497354497354497 [2024-06-27 20:26:14,839 INFO L175 Difference]: Start difference. First operand has 395 places, 587 transitions, 7251 flow. Second operand 9 states and 170 transitions. [2024-06-27 20:26:14,839 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 403 places, 631 transitions, 9702 flow [2024-06-27 20:26:17,750 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 398 places, 631 transitions, 9564 flow, removed 33 selfloop flow, removed 5 redundant places. [2024-06-27 20:26:17,757 INFO L231 Difference]: Finished difference. Result has 400 places, 602 transitions, 7804 flow [2024-06-27 20:26:17,757 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7113, PETRI_DIFFERENCE_MINUEND_PLACES=390, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=587, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=454, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7804, PETRI_PLACES=400, PETRI_TRANSITIONS=602} [2024-06-27 20:26:17,757 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 357 predicate places. [2024-06-27 20:26:17,757 INFO L495 AbstractCegarLoop]: Abstraction has has 400 places, 602 transitions, 7804 flow [2024-06-27 20:26:17,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 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) [2024-06-27 20:26:17,758 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:26:17,758 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:26:17,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-27 20:26:17,758 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:26:17,758 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:26:17,758 INFO L85 PathProgramCache]: Analyzing trace with hash -452891881, now seen corresponding path program 2 times [2024-06-27 20:26:17,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:26:17,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906907876] [2024-06-27 20:26:17,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:26:17,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:26:17,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:26:18,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:26:18,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:26:18,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906907876] [2024-06-27 20:26:18,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906907876] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:26:18,454 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:26:18,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:26:18,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963375272] [2024-06-27 20:26:18,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:26:18,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:26:18,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:26:18,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:26:18,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:26:18,535 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:26:18,535 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 400 places, 602 transitions, 7804 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 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) [2024-06-27 20:26:18,535 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:26:18,535 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:26:18,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:26:20,338 INFO L124 PetriNetUnfolderBase]: 4752/7335 cut-off events. [2024-06-27 20:26:20,338 INFO L125 PetriNetUnfolderBase]: For 1237146/1237150 co-relation queries the response was YES. [2024-06-27 20:26:20,421 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69267 conditions, 7335 events. 4752/7335 cut-off events. For 1237146/1237150 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 42757 event pairs, 1455 based on Foata normal form. 4/7338 useless extension candidates. Maximal degree in co-relation 69086. Up to 6882 conditions per place. [2024-06-27 20:26:20,451 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 536 selfloop transitions, 89 changer transitions 0/650 dead transitions. [2024-06-27 20:26:20,451 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 408 places, 650 transitions, 10071 flow [2024-06-27 20:26:20,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:26:20,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:26:20,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-27 20:26:20,452 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-27 20:26:20,452 INFO L175 Difference]: Start difference. First operand has 400 places, 602 transitions, 7804 flow. Second operand 9 states and 171 transitions. [2024-06-27 20:26:20,452 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 408 places, 650 transitions, 10071 flow [2024-06-27 20:26:23,600 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 404 places, 650 transitions, 9851 flow, removed 74 selfloop flow, removed 4 redundant places. [2024-06-27 20:26:23,606 INFO L231 Difference]: Finished difference. Result has 407 places, 621 transitions, 8154 flow [2024-06-27 20:26:23,607 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7592, PETRI_DIFFERENCE_MINUEND_PLACES=396, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=602, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=522, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8154, PETRI_PLACES=407, PETRI_TRANSITIONS=621} [2024-06-27 20:26:23,607 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 364 predicate places. [2024-06-27 20:26:23,607 INFO L495 AbstractCegarLoop]: Abstraction has has 407 places, 621 transitions, 8154 flow [2024-06-27 20:26:23,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 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) [2024-06-27 20:26:23,607 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:26:23,607 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:26:23,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-27 20:26:23,607 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:26:23,608 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:26:23,608 INFO L85 PathProgramCache]: Analyzing trace with hash -452891695, now seen corresponding path program 1 times [2024-06-27 20:26:23,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:26:23,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146162839] [2024-06-27 20:26:23,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:26:23,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:26:23,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:26:24,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:26:24,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:26:24,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146162839] [2024-06-27 20:26:24,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146162839] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:26:24,283 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:26:24,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:26:24,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468000801] [2024-06-27 20:26:24,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:26:24,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:26:24,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:26:24,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:26:24,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:26:24,359 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:26:24,360 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 407 places, 621 transitions, 8154 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 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) [2024-06-27 20:26:24,360 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:26:24,360 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:26:24,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:26:26,257 INFO L124 PetriNetUnfolderBase]: 4873/7464 cut-off events. [2024-06-27 20:26:26,257 INFO L125 PetriNetUnfolderBase]: For 1264496/1264500 co-relation queries the response was YES. [2024-06-27 20:26:26,340 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71308 conditions, 7464 events. 4873/7464 cut-off events. For 1264496/1264500 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 43061 event pairs, 1554 based on Foata normal form. 5/7468 useless extension candidates. Maximal degree in co-relation 71124. Up to 7240 conditions per place. [2024-06-27 20:26:26,371 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 573 selfloop transitions, 83 changer transitions 0/659 dead transitions. [2024-06-27 20:26:26,371 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 415 places, 659 transitions, 10385 flow [2024-06-27 20:26:26,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:26:26,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:26:26,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-27 20:26:26,372 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41798941798941797 [2024-06-27 20:26:26,372 INFO L175 Difference]: Start difference. First operand has 407 places, 621 transitions, 8154 flow. Second operand 9 states and 158 transitions. [2024-06-27 20:26:26,372 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 415 places, 659 transitions, 10385 flow [2024-06-27 20:26:29,566 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 413 places, 659 transitions, 10277 flow, removed 49 selfloop flow, removed 2 redundant places. [2024-06-27 20:26:29,573 INFO L231 Difference]: Finished difference. Result has 414 places, 634 transitions, 8449 flow [2024-06-27 20:26:29,573 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8046, PETRI_DIFFERENCE_MINUEND_PLACES=405, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=621, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=548, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8449, PETRI_PLACES=414, PETRI_TRANSITIONS=634} [2024-06-27 20:26:29,573 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 371 predicate places. [2024-06-27 20:26:29,573 INFO L495 AbstractCegarLoop]: Abstraction has has 414 places, 634 transitions, 8449 flow [2024-06-27 20:26:29,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 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) [2024-06-27 20:26:29,574 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:26:29,574 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:26:29,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-27 20:26:29,574 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:26:29,574 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:26:29,574 INFO L85 PathProgramCache]: Analyzing trace with hash -452892067, now seen corresponding path program 6 times [2024-06-27 20:26:29,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:26:29,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613486840] [2024-06-27 20:26:29,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:26:29,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:26:29,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:26:30,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:26:30,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:26:30,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613486840] [2024-06-27 20:26:30,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613486840] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:26:30,270 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:26:30,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:26:30,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817266390] [2024-06-27 20:26:30,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:26:30,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:26:30,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:26:30,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:26:30,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:26:30,350 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:26:30,350 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 414 places, 634 transitions, 8449 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 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) [2024-06-27 20:26:30,350 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:26:30,350 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:26:30,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:26:32,329 INFO L124 PetriNetUnfolderBase]: 4788/7381 cut-off events. [2024-06-27 20:26:32,329 INFO L125 PetriNetUnfolderBase]: For 1295060/1295066 co-relation queries the response was YES. [2024-06-27 20:26:32,410 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71646 conditions, 7381 events. 4788/7381 cut-off events. For 1295060/1295066 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 42991 event pairs, 1328 based on Foata normal form. 7/7387 useless extension candidates. Maximal degree in co-relation 71459. Up to 6878 conditions per place. [2024-06-27 20:26:32,439 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 483 selfloop transitions, 150 changer transitions 0/662 dead transitions. [2024-06-27 20:26:32,439 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 422 places, 662 transitions, 10461 flow [2024-06-27 20:26:32,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:26:32,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:26:32,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-27 20:26:32,440 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43915343915343913 [2024-06-27 20:26:32,440 INFO L175 Difference]: Start difference. First operand has 414 places, 634 transitions, 8449 flow. Second operand 9 states and 166 transitions. [2024-06-27 20:26:32,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 422 places, 662 transitions, 10461 flow [2024-06-27 20:26:35,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 419 places, 662 transitions, 10332 flow, removed 51 selfloop flow, removed 3 redundant places. [2024-06-27 20:26:35,820 INFO L231 Difference]: Finished difference. Result has 420 places, 637 transitions, 8672 flow [2024-06-27 20:26:35,821 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8320, PETRI_DIFFERENCE_MINUEND_PLACES=411, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=634, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=487, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8672, PETRI_PLACES=420, PETRI_TRANSITIONS=637} [2024-06-27 20:26:35,821 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 377 predicate places. [2024-06-27 20:26:35,821 INFO L495 AbstractCegarLoop]: Abstraction has has 420 places, 637 transitions, 8672 flow [2024-06-27 20:26:35,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 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) [2024-06-27 20:26:35,821 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:26:35,821 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:26:35,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-27 20:26:35,821 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:26:35,822 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:26:35,822 INFO L85 PathProgramCache]: Analyzing trace with hash 1052205785, now seen corresponding path program 7 times [2024-06-27 20:26:35,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:26:35,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153781946] [2024-06-27 20:26:35,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:26:35,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:26:35,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:26:36,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:26:36,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:26:36,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153781946] [2024-06-27 20:26:36,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153781946] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:26:36,541 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:26:36,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:26:36,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215215574] [2024-06-27 20:26:36,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:26:36,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:26:36,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:26:36,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:26:36,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:26:36,627 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:26:36,628 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 420 places, 637 transitions, 8672 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 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) [2024-06-27 20:26:36,628 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:26:36,628 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:26:36,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:26:38,627 INFO L124 PetriNetUnfolderBase]: 4785/7387 cut-off events. [2024-06-27 20:26:38,627 INFO L125 PetriNetUnfolderBase]: For 1315533/1315537 co-relation queries the response was YES. [2024-06-27 20:26:38,710 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72033 conditions, 7387 events. 4785/7387 cut-off events. For 1315533/1315537 co-relation queries the response was YES. Maximal size of possible extension queue 379. Compared 43151 event pairs, 1336 based on Foata normal form. 5/7391 useless extension candidates. Maximal degree in co-relation 71844. Up to 7097 conditions per place. [2024-06-27 20:26:38,739 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 570 selfloop transitions, 57 changer transitions 0/656 dead transitions. [2024-06-27 20:26:38,739 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 428 places, 656 transitions, 10000 flow [2024-06-27 20:26:38,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:26:38,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:26:38,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-27 20:26:38,740 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4074074074074074 [2024-06-27 20:26:38,740 INFO L175 Difference]: Start difference. First operand has 420 places, 637 transitions, 8672 flow. Second operand 9 states and 154 transitions. [2024-06-27 20:26:38,740 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 428 places, 656 transitions, 10000 flow [2024-06-27 20:26:42,532 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 422 places, 656 transitions, 9687 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-27 20:26:42,538 INFO L231 Difference]: Finished difference. Result has 423 places, 637 transitions, 8479 flow [2024-06-27 20:26:42,538 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8359, PETRI_DIFFERENCE_MINUEND_PLACES=414, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=637, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=580, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8479, PETRI_PLACES=423, PETRI_TRANSITIONS=637} [2024-06-27 20:26:42,539 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 380 predicate places. [2024-06-27 20:26:42,539 INFO L495 AbstractCegarLoop]: Abstraction has has 423 places, 637 transitions, 8479 flow [2024-06-27 20:26:42,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 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) [2024-06-27 20:26:42,539 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:26:42,539 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:26:42,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-27 20:26:42,539 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:26:42,539 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:26:42,539 INFO L85 PathProgramCache]: Analyzing trace with hash -275523025, now seen corresponding path program 2 times [2024-06-27 20:26:42,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:26:42,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180997660] [2024-06-27 20:26:42,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:26:42,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:26:42,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:26:43,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:26:43,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:26:43,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180997660] [2024-06-27 20:26:43,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180997660] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:26:43,221 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:26:43,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:26:43,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185026294] [2024-06-27 20:26:43,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:26:43,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:26:43,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:26:43,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:26:43,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:26:43,353 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:26:43,353 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 423 places, 637 transitions, 8479 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 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) [2024-06-27 20:26:43,353 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:26:43,353 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:26:43,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:26:45,454 INFO L124 PetriNetUnfolderBase]: 4880/7475 cut-off events. [2024-06-27 20:26:45,454 INFO L125 PetriNetUnfolderBase]: For 1334797/1334801 co-relation queries the response was YES. [2024-06-27 20:26:45,535 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72419 conditions, 7475 events. 4880/7475 cut-off events. For 1334797/1334801 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 43158 event pairs, 1558 based on Foata normal form. 5/7479 useless extension candidates. Maximal degree in co-relation 72229. Up to 7249 conditions per place. [2024-06-27 20:26:45,564 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 567 selfloop transitions, 91 changer transitions 0/661 dead transitions. [2024-06-27 20:26:45,564 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 431 places, 661 transitions, 10317 flow [2024-06-27 20:26:45,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:26:45,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:26:45,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-27 20:26:45,565 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4021164021164021 [2024-06-27 20:26:45,565 INFO L175 Difference]: Start difference. First operand has 423 places, 637 transitions, 8479 flow. Second operand 9 states and 152 transitions. [2024-06-27 20:26:45,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 431 places, 661 transitions, 10317 flow [2024-06-27 20:26:49,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 423 places, 661 transitions, 10186 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-27 20:26:49,458 INFO L231 Difference]: Finished difference. Result has 424 places, 640 transitions, 8572 flow [2024-06-27 20:26:49,458 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8348, PETRI_DIFFERENCE_MINUEND_PLACES=415, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=637, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=549, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8572, PETRI_PLACES=424, PETRI_TRANSITIONS=640} [2024-06-27 20:26:49,458 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 381 predicate places. [2024-06-27 20:26:49,458 INFO L495 AbstractCegarLoop]: Abstraction has has 424 places, 640 transitions, 8572 flow [2024-06-27 20:26:49,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 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) [2024-06-27 20:26:49,458 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:26:49,458 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:26:49,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-27 20:26:49,459 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:26:49,459 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:26:49,459 INFO L85 PathProgramCache]: Analyzing trace with hash -1077024279, now seen corresponding path program 8 times [2024-06-27 20:26:49,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:26:49,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141322563] [2024-06-27 20:26:49,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:26:49,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:26:49,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:26:50,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:26:50,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:26:50,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141322563] [2024-06-27 20:26:50,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141322563] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:26:50,143 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:26:50,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:26:50,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349896016] [2024-06-27 20:26:50,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:26:50,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:26:50,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:26:50,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:26:50,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:26:50,243 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:26:50,243 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 424 places, 640 transitions, 8572 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 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) [2024-06-27 20:26:50,243 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:26:50,243 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:26:50,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:26:52,387 INFO L124 PetriNetUnfolderBase]: 4787/7381 cut-off events. [2024-06-27 20:26:52,387 INFO L125 PetriNetUnfolderBase]: For 1358165/1358171 co-relation queries the response was YES. [2024-06-27 20:26:52,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72218 conditions, 7381 events. 4787/7381 cut-off events. For 1358165/1358171 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 42982 event pairs, 1349 based on Foata normal form. 7/7387 useless extension candidates. Maximal degree in co-relation 72027. Up to 6877 conditions per place. [2024-06-27 20:26:52,494 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 476 selfloop transitions, 155 changer transitions 0/661 dead transitions. [2024-06-27 20:26:52,494 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 432 places, 661 transitions, 10324 flow [2024-06-27 20:26:52,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:26:52,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:26:52,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-27 20:26:52,495 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42592592592592593 [2024-06-27 20:26:52,496 INFO L175 Difference]: Start difference. First operand has 424 places, 640 transitions, 8572 flow. Second operand 9 states and 161 transitions. [2024-06-27 20:26:52,496 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 432 places, 661 transitions, 10324 flow [2024-06-27 20:26:55,969 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 426 places, 661 transitions, 10081 flow, removed 41 selfloop flow, removed 6 redundant places. [2024-06-27 20:26:55,977 INFO L231 Difference]: Finished difference. Result has 427 places, 640 transitions, 8645 flow [2024-06-27 20:26:55,978 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8329, PETRI_DIFFERENCE_MINUEND_PLACES=418, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=640, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=485, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8645, PETRI_PLACES=427, PETRI_TRANSITIONS=640} [2024-06-27 20:26:55,978 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 384 predicate places. [2024-06-27 20:26:55,979 INFO L495 AbstractCegarLoop]: Abstraction has has 427 places, 640 transitions, 8645 flow [2024-06-27 20:26:55,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 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) [2024-06-27 20:26:55,979 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:26:55,979 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:26:55,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-27 20:26:55,979 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:26:55,980 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:26:55,980 INFO L85 PathProgramCache]: Analyzing trace with hash -1077024093, now seen corresponding path program 3 times [2024-06-27 20:26:55,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:26:55,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793977066] [2024-06-27 20:26:55,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:26:55,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:26:55,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:26:56,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:26:56,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:26:56,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793977066] [2024-06-27 20:26:56,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793977066] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:26:56,695 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:26:56,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:26:56,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608642354] [2024-06-27 20:26:56,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:26:56,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:26:56,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:26:56,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:26:56,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:26:56,814 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:26:56,814 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 427 places, 640 transitions, 8645 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 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) [2024-06-27 20:26:56,814 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:26:56,814 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:26:56,814 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:26:58,955 INFO L124 PetriNetUnfolderBase]: 4781/7374 cut-off events. [2024-06-27 20:26:58,955 INFO L125 PetriNetUnfolderBase]: For 1377242/1377246 co-relation queries the response was YES. [2024-06-27 20:26:59,033 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72281 conditions, 7374 events. 4781/7374 cut-off events. For 1377242/1377246 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 42948 event pairs, 1444 based on Foata normal form. 4/7377 useless extension candidates. Maximal degree in co-relation 72089. Up to 6912 conditions per place. [2024-06-27 20:26:59,061 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 540 selfloop transitions, 94 changer transitions 0/664 dead transitions. [2024-06-27 20:26:59,061 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 435 places, 664 transitions, 10437 flow [2024-06-27 20:26:59,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:26:59,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:26:59,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-27 20:26:59,062 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43386243386243384 [2024-06-27 20:26:59,062 INFO L175 Difference]: Start difference. First operand has 427 places, 640 transitions, 8645 flow. Second operand 9 states and 164 transitions. [2024-06-27 20:26:59,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 435 places, 664 transitions, 10437 flow [2024-06-27 20:27:02,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 429 places, 664 transitions, 10145 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-27 20:27:02,304 INFO L231 Difference]: Finished difference. Result has 430 places, 640 transitions, 8547 flow [2024-06-27 20:27:02,304 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8353, PETRI_DIFFERENCE_MINUEND_PLACES=421, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=640, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=546, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8547, PETRI_PLACES=430, PETRI_TRANSITIONS=640} [2024-06-27 20:27:02,304 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 387 predicate places. [2024-06-27 20:27:02,304 INFO L495 AbstractCegarLoop]: Abstraction has has 430 places, 640 transitions, 8547 flow [2024-06-27 20:27:02,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 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) [2024-06-27 20:27:02,304 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:27:02,305 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:27:02,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-27 20:27:02,305 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:27:02,305 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:27:02,305 INFO L85 PathProgramCache]: Analyzing trace with hash -275760175, now seen corresponding path program 3 times [2024-06-27 20:27:02,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:27:02,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143477820] [2024-06-27 20:27:02,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:27:02,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:27:02,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:27:03,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:27:03,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:27:03,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143477820] [2024-06-27 20:27:03,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143477820] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:27:03,011 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:27:03,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:27:03,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885172440] [2024-06-27 20:27:03,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:27:03,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:27:03,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:27:03,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:27:03,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:27:03,093 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:27:03,094 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 430 places, 640 transitions, 8547 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 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) [2024-06-27 20:27:03,094 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:27:03,094 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:27:03,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:27:05,158 INFO L124 PetriNetUnfolderBase]: 4868/7459 cut-off events. [2024-06-27 20:27:05,158 INFO L125 PetriNetUnfolderBase]: For 1387145/1387149 co-relation queries the response was YES. [2024-06-27 20:27:05,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72646 conditions, 7459 events. 4868/7459 cut-off events. For 1387145/1387149 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 43031 event pairs, 1562 based on Foata normal form. 5/7463 useless extension candidates. Maximal degree in co-relation 72453. Up to 7234 conditions per place. [2024-06-27 20:27:05,282 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 570 selfloop transitions, 88 changer transitions 0/661 dead transitions. [2024-06-27 20:27:05,282 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 438 places, 661 transitions, 10361 flow [2024-06-27 20:27:05,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:27:05,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:27:05,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-27 20:27:05,283 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-27 20:27:05,283 INFO L175 Difference]: Start difference. First operand has 430 places, 640 transitions, 8547 flow. Second operand 9 states and 153 transitions. [2024-06-27 20:27:05,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 438 places, 661 transitions, 10361 flow [2024-06-27 20:27:08,790 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 431 places, 661 transitions, 10151 flow, removed 20 selfloop flow, removed 7 redundant places. [2024-06-27 20:27:08,798 INFO L231 Difference]: Finished difference. Result has 432 places, 640 transitions, 8519 flow [2024-06-27 20:27:08,798 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8337, PETRI_DIFFERENCE_MINUEND_PLACES=423, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=640, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=552, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8519, PETRI_PLACES=432, PETRI_TRANSITIONS=640} [2024-06-27 20:27:08,798 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 389 predicate places. [2024-06-27 20:27:08,798 INFO L495 AbstractCegarLoop]: Abstraction has has 432 places, 640 transitions, 8519 flow [2024-06-27 20:27:08,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 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) [2024-06-27 20:27:08,798 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:27:08,799 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:27:08,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-27 20:27:08,799 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:27:08,799 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:27:08,799 INFO L85 PathProgramCache]: Analyzing trace with hash -286011193, now seen corresponding path program 4 times [2024-06-27 20:27:08,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:27:08,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627720753] [2024-06-27 20:27:08,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:27:08,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:27:08,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:27:09,730 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:27:09,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:27:09,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627720753] [2024-06-27 20:27:09,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627720753] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:27:09,730 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:27:09,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:27:09,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412466449] [2024-06-27 20:27:09,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:27:09,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:27:09,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:27:09,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:27:09,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:27:09,893 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:27:09,893 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 432 places, 640 transitions, 8519 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:27:09,893 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:27:09,893 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:27:09,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:27:11,955 INFO L124 PetriNetUnfolderBase]: 4863/7510 cut-off events. [2024-06-27 20:27:11,955 INFO L125 PetriNetUnfolderBase]: For 1433409/1433411 co-relation queries the response was YES. [2024-06-27 20:27:12,047 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73290 conditions, 7510 events. 4863/7510 cut-off events. For 1433409/1433411 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 44059 event pairs, 1369 based on Foata normal form. 4/7513 useless extension candidates. Maximal degree in co-relation 73096. Up to 7106 conditions per place. [2024-06-27 20:27:12,081 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 574 selfloop transitions, 86 changer transitions 0/690 dead transitions. [2024-06-27 20:27:12,081 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 441 places, 690 transitions, 10356 flow [2024-06-27 20:27:12,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:27:12,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:27:12,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 183 transitions. [2024-06-27 20:27:12,082 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4357142857142857 [2024-06-27 20:27:12,082 INFO L175 Difference]: Start difference. First operand has 432 places, 640 transitions, 8519 flow. Second operand 10 states and 183 transitions. [2024-06-27 20:27:12,082 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 441 places, 690 transitions, 10356 flow [2024-06-27 20:27:15,730 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 435 places, 690 transitions, 10230 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-27 20:27:15,737 INFO L231 Difference]: Finished difference. Result has 437 places, 656 transitions, 8797 flow [2024-06-27 20:27:15,738 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8393, PETRI_DIFFERENCE_MINUEND_PLACES=426, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=640, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=556, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8797, PETRI_PLACES=437, PETRI_TRANSITIONS=656} [2024-06-27 20:27:15,738 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 394 predicate places. [2024-06-27 20:27:15,738 INFO L495 AbstractCegarLoop]: Abstraction has has 437 places, 656 transitions, 8797 flow [2024-06-27 20:27:15,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:27:15,738 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:27:15,738 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:27:15,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-27 20:27:15,739 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:27:15,739 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:27:15,739 INFO L85 PathProgramCache]: Analyzing trace with hash -571102693, now seen corresponding path program 5 times [2024-06-27 20:27:15,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:27:15,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361560375] [2024-06-27 20:27:15,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:27:15,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:27:15,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:27:16,663 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:27:16,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:27:16,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361560375] [2024-06-27 20:27:16,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361560375] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:27:16,664 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:27:16,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:27:16,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712687036] [2024-06-27 20:27:16,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:27:16,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:27:16,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:27:16,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:27:16,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:27:16,798 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:27:16,798 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 437 places, 656 transitions, 8797 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:27:16,798 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:27:16,798 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:27:16,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:27:18,913 INFO L124 PetriNetUnfolderBase]: 4879/7536 cut-off events. [2024-06-27 20:27:18,913 INFO L125 PetriNetUnfolderBase]: For 1460195/1460197 co-relation queries the response was YES. [2024-06-27 20:27:18,999 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73935 conditions, 7536 events. 4879/7536 cut-off events. For 1460195/1460197 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 44242 event pairs, 1376 based on Foata normal form. 4/7539 useless extension candidates. Maximal degree in co-relation 73739. Up to 7202 conditions per place. [2024-06-27 20:27:19,029 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 582 selfloop transitions, 76 changer transitions 0/688 dead transitions. [2024-06-27 20:27:19,029 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 446 places, 688 transitions, 10286 flow [2024-06-27 20:27:19,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:27:19,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:27:19,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 177 transitions. [2024-06-27 20:27:19,030 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42142857142857143 [2024-06-27 20:27:19,030 INFO L175 Difference]: Start difference. First operand has 437 places, 656 transitions, 8797 flow. Second operand 10 states and 177 transitions. [2024-06-27 20:27:19,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 446 places, 688 transitions, 10286 flow [2024-06-27 20:27:23,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 440 places, 688 transitions, 10183 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-27 20:27:23,383 INFO L231 Difference]: Finished difference. Result has 441 places, 660 transitions, 8926 flow [2024-06-27 20:27:23,383 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8694, PETRI_DIFFERENCE_MINUEND_PLACES=431, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=656, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=580, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8926, PETRI_PLACES=441, PETRI_TRANSITIONS=660} [2024-06-27 20:27:23,383 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 398 predicate places. [2024-06-27 20:27:23,383 INFO L495 AbstractCegarLoop]: Abstraction has has 441 places, 660 transitions, 8926 flow [2024-06-27 20:27:23,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:27:23,384 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:27:23,384 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:27:23,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-27 20:27:23,384 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:27:23,384 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:27:23,384 INFO L85 PathProgramCache]: Analyzing trace with hash -571102383, now seen corresponding path program 2 times [2024-06-27 20:27:23,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:27:23,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475662022] [2024-06-27 20:27:23,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:27:23,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:27:23,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:27:24,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:27:24,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:27:24,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475662022] [2024-06-27 20:27:24,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475662022] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:27:24,267 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:27:24,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:27:24,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980727484] [2024-06-27 20:27:24,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:27:24,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:27:24,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:27:24,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:27:24,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:27:24,376 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:27:24,376 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 441 places, 660 transitions, 8926 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 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) [2024-06-27 20:27:24,376 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:27:24,376 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:27:24,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:27:26,591 INFO L124 PetriNetUnfolderBase]: 4997/7665 cut-off events. [2024-06-27 20:27:26,592 INFO L125 PetriNetUnfolderBase]: For 1481834/1481836 co-relation queries the response was YES. [2024-06-27 20:27:26,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75105 conditions, 7665 events. 4997/7665 cut-off events. For 1481834/1481836 co-relation queries the response was YES. Maximal size of possible extension queue 402. Compared 44599 event pairs, 1433 based on Foata normal form. 3/7667 useless extension candidates. Maximal degree in co-relation 74907. Up to 7422 conditions per place. [2024-06-27 20:27:26,703 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 601 selfloop transitions, 99 changer transitions 0/703 dead transitions. [2024-06-27 20:27:26,703 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 450 places, 703 transitions, 10832 flow [2024-06-27 20:27:26,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:27:26,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:27:26,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 174 transitions. [2024-06-27 20:27:26,704 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4142857142857143 [2024-06-27 20:27:26,704 INFO L175 Difference]: Start difference. First operand has 441 places, 660 transitions, 8926 flow. Second operand 10 states and 174 transitions. [2024-06-27 20:27:26,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 450 places, 703 transitions, 10832 flow [2024-06-27 20:27:31,272 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 443 places, 703 transitions, 10682 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-27 20:27:31,279 INFO L231 Difference]: Finished difference. Result has 444 places, 675 transitions, 9177 flow [2024-06-27 20:27:31,280 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8776, PETRI_DIFFERENCE_MINUEND_PLACES=434, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=660, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=570, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9177, PETRI_PLACES=444, PETRI_TRANSITIONS=675} [2024-06-27 20:27:31,280 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 401 predicate places. [2024-06-27 20:27:31,280 INFO L495 AbstractCegarLoop]: Abstraction has has 444 places, 675 transitions, 9177 flow [2024-06-27 20:27:31,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 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) [2024-06-27 20:27:31,280 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:27:31,280 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:27:31,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-27 20:27:31,280 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:27:31,281 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:27:31,281 INFO L85 PathProgramCache]: Analyzing trace with hash -562770513, now seen corresponding path program 3 times [2024-06-27 20:27:31,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:27:31,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732530405] [2024-06-27 20:27:31,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:27:31,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:27:31,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:27:32,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:27:32,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:27:32,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732530405] [2024-06-27 20:27:32,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732530405] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:27:32,197 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:27:32,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:27:32,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076014177] [2024-06-27 20:27:32,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:27:32,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:27:32,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:27:32,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:27:32,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:27:32,295 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:27:32,295 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 444 places, 675 transitions, 9177 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 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) [2024-06-27 20:27:32,295 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:27:32,295 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:27:32,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:27:34,454 INFO L124 PetriNetUnfolderBase]: 5020/7695 cut-off events. [2024-06-27 20:27:34,454 INFO L125 PetriNetUnfolderBase]: For 1514154/1514156 co-relation queries the response was YES. [2024-06-27 20:27:34,561 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75752 conditions, 7695 events. 5020/7695 cut-off events. For 1514154/1514156 co-relation queries the response was YES. Maximal size of possible extension queue 406. Compared 44697 event pairs, 1436 based on Foata normal form. 3/7697 useless extension candidates. Maximal degree in co-relation 75553. Up to 7484 conditions per place. [2024-06-27 20:27:34,596 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 616 selfloop transitions, 92 changer transitions 0/711 dead transitions. [2024-06-27 20:27:34,596 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 453 places, 711 transitions, 11081 flow [2024-06-27 20:27:34,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:27:34,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:27:34,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 170 transitions. [2024-06-27 20:27:34,597 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-27 20:27:34,597 INFO L175 Difference]: Start difference. First operand has 444 places, 675 transitions, 9177 flow. Second operand 10 states and 170 transitions. [2024-06-27 20:27:34,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 453 places, 711 transitions, 11081 flow [2024-06-27 20:27:38,853 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 449 places, 711 transitions, 10960 flow, removed 42 selfloop flow, removed 4 redundant places. [2024-06-27 20:27:38,861 INFO L231 Difference]: Finished difference. Result has 450 places, 687 transitions, 9438 flow [2024-06-27 20:27:38,861 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9081, PETRI_DIFFERENCE_MINUEND_PLACES=440, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=675, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=592, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9438, PETRI_PLACES=450, PETRI_TRANSITIONS=687} [2024-06-27 20:27:38,861 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 407 predicate places. [2024-06-27 20:27:38,861 INFO L495 AbstractCegarLoop]: Abstraction has has 450 places, 687 transitions, 9438 flow [2024-06-27 20:27:38,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 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) [2024-06-27 20:27:38,862 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:27:38,862 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:27:38,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-27 20:27:38,862 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:27:38,862 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:27:38,862 INFO L85 PathProgramCache]: Analyzing trace with hash -562760283, now seen corresponding path program 4 times [2024-06-27 20:27:38,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:27:38,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174222103] [2024-06-27 20:27:38,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:27:38,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:27:38,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:27:39,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:27:39,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:27:39,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174222103] [2024-06-27 20:27:39,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174222103] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:27:39,795 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:27:39,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:27:39,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278352376] [2024-06-27 20:27:39,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:27:39,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:27:39,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:27:39,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:27:39,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:27:39,907 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:27:39,907 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 450 places, 687 transitions, 9438 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 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) [2024-06-27 20:27:39,907 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:27:39,907 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:27:39,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:27:42,125 INFO L124 PetriNetUnfolderBase]: 5017/7691 cut-off events. [2024-06-27 20:27:42,126 INFO L125 PetriNetUnfolderBase]: For 1534852/1534854 co-relation queries the response was YES. [2024-06-27 20:27:42,219 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75970 conditions, 7691 events. 5017/7691 cut-off events. For 1534852/1534854 co-relation queries the response was YES. Maximal size of possible extension queue 406. Compared 44746 event pairs, 1438 based on Foata normal form. 3/7693 useless extension candidates. Maximal degree in co-relation 75770. Up to 7493 conditions per place. [2024-06-27 20:27:42,252 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 625 selfloop transitions, 82 changer transitions 0/710 dead transitions. [2024-06-27 20:27:42,252 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 459 places, 710 transitions, 10938 flow [2024-06-27 20:27:42,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:27:42,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:27:42,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 167 transitions. [2024-06-27 20:27:42,252 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3976190476190476 [2024-06-27 20:27:42,253 INFO L175 Difference]: Start difference. First operand has 450 places, 687 transitions, 9438 flow. Second operand 10 states and 167 transitions. [2024-06-27 20:27:42,253 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 459 places, 710 transitions, 10938 flow [2024-06-27 20:27:46,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 454 places, 710 transitions, 10796 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-27 20:27:46,024 INFO L231 Difference]: Finished difference. Result has 455 places, 687 transitions, 9469 flow [2024-06-27 20:27:46,025 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9296, PETRI_DIFFERENCE_MINUEND_PLACES=445, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=687, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=605, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9469, PETRI_PLACES=455, PETRI_TRANSITIONS=687} [2024-06-27 20:27:46,025 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 412 predicate places. [2024-06-27 20:27:46,025 INFO L495 AbstractCegarLoop]: Abstraction has has 455 places, 687 transitions, 9469 flow [2024-06-27 20:27:46,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 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) [2024-06-27 20:27:46,025 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:27:46,025 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:27:46,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-27 20:27:46,026 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:27:46,026 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:27:46,026 INFO L85 PathProgramCache]: Analyzing trace with hash -562770823, now seen corresponding path program 6 times [2024-06-27 20:27:46,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:27:46,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437514826] [2024-06-27 20:27:46,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:27:46,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:27:46,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:27:46,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:27:46,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:27:46,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437514826] [2024-06-27 20:27:46,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437514826] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:27:46,981 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:27:46,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:27:46,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241043971] [2024-06-27 20:27:46,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:27:46,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:27:46,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:27:46,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:27:46,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:27:47,123 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:27:47,124 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 455 places, 687 transitions, 9469 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:27:47,124 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:27:47,124 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:27:47,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:27:49,385 INFO L124 PetriNetUnfolderBase]: 4933/7611 cut-off events. [2024-06-27 20:27:49,385 INFO L125 PetriNetUnfolderBase]: For 1571809/1571811 co-relation queries the response was YES. [2024-06-27 20:27:49,476 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76023 conditions, 7611 events. 4933/7611 cut-off events. For 1571809/1571811 co-relation queries the response was YES. Maximal size of possible extension queue 407. Compared 44729 event pairs, 1381 based on Foata normal form. 4/7614 useless extension candidates. Maximal degree in co-relation 75821. Up to 7287 conditions per place. [2024-06-27 20:27:49,507 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 611 selfloop transitions, 63 changer transitions 0/713 dead transitions. [2024-06-27 20:27:49,507 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 464 places, 713 transitions, 10947 flow [2024-06-27 20:27:49,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:27:49,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:27:49,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 172 transitions. [2024-06-27 20:27:49,508 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4095238095238095 [2024-06-27 20:27:49,508 INFO L175 Difference]: Start difference. First operand has 455 places, 687 transitions, 9469 flow. Second operand 10 states and 172 transitions. [2024-06-27 20:27:49,508 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 464 places, 713 transitions, 10947 flow [2024-06-27 20:27:53,821 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 456 places, 713 transitions, 10773 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-27 20:27:53,829 INFO L231 Difference]: Finished difference. Result has 457 places, 689 transitions, 9475 flow [2024-06-27 20:27:53,829 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9295, PETRI_DIFFERENCE_MINUEND_PLACES=447, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=687, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=624, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9475, PETRI_PLACES=457, PETRI_TRANSITIONS=689} [2024-06-27 20:27:53,829 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 414 predicate places. [2024-06-27 20:27:53,829 INFO L495 AbstractCegarLoop]: Abstraction has has 457 places, 689 transitions, 9475 flow [2024-06-27 20:27:53,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:27:53,829 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:27:53,829 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:27:53,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-27 20:27:53,830 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:27:53,830 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:27:53,830 INFO L85 PathProgramCache]: Analyzing trace with hash 1052203119, now seen corresponding path program 5 times [2024-06-27 20:27:53,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:27:53,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456679581] [2024-06-27 20:27:53,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:27:53,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:27:53,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:27:54,809 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:27:54,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:27:54,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456679581] [2024-06-27 20:27:54,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456679581] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:27:54,810 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:27:54,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:27:54,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186984822] [2024-06-27 20:27:54,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:27:54,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:27:54,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:27:54,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:27:54,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:27:54,935 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:27:54,935 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 457 places, 689 transitions, 9475 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 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) [2024-06-27 20:27:54,935 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:27:54,935 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:27:54,935 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:27:57,196 INFO L124 PetriNetUnfolderBase]: 5030/7710 cut-off events. [2024-06-27 20:27:57,196 INFO L125 PetriNetUnfolderBase]: For 1587672/1587676 co-relation queries the response was YES. [2024-06-27 20:27:57,283 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76741 conditions, 7710 events. 5030/7710 cut-off events. For 1587672/1587676 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 44829 event pairs, 1414 based on Foata normal form. 5/7714 useless extension candidates. Maximal degree in co-relation 76538. Up to 7508 conditions per place. [2024-06-27 20:27:57,312 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 626 selfloop transitions, 84 changer transitions 0/713 dead transitions. [2024-06-27 20:27:57,312 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 466 places, 713 transitions, 11253 flow [2024-06-27 20:27:57,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:27:57,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:27:57,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 164 transitions. [2024-06-27 20:27:57,313 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3904761904761905 [2024-06-27 20:27:57,313 INFO L175 Difference]: Start difference. First operand has 457 places, 689 transitions, 9475 flow. Second operand 10 states and 164 transitions. [2024-06-27 20:27:57,313 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 466 places, 713 transitions, 11253 flow [2024-06-27 20:28:00,834 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 458 places, 713 transitions, 11107 flow, removed 13 selfloop flow, removed 8 redundant places. [2024-06-27 20:28:00,842 INFO L231 Difference]: Finished difference. Result has 459 places, 692 transitions, 9559 flow [2024-06-27 20:28:00,842 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9329, PETRI_DIFFERENCE_MINUEND_PLACES=449, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=689, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=608, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9559, PETRI_PLACES=459, PETRI_TRANSITIONS=692} [2024-06-27 20:28:00,842 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 416 predicate places. [2024-06-27 20:28:00,842 INFO L495 AbstractCegarLoop]: Abstraction has has 459 places, 692 transitions, 9559 flow [2024-06-27 20:28:00,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 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) [2024-06-27 20:28:00,843 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:28:00,843 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:28:00,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-27 20:28:00,843 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:28:00,843 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:28:00,843 INFO L85 PathProgramCache]: Analyzing trace with hash 581217639, now seen corresponding path program 6 times [2024-06-27 20:28:00,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:28:00,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667258938] [2024-06-27 20:28:00,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:28:00,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:28:00,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:28:01,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:28:01,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:28:01,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667258938] [2024-06-27 20:28:01,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667258938] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:28:01,777 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:28:01,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:28:01,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036880388] [2024-06-27 20:28:01,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:28:01,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:28:01,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:28:01,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:28:01,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:28:01,894 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:28:01,894 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 459 places, 692 transitions, 9559 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 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) [2024-06-27 20:28:01,894 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:28:01,894 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:28:01,894 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:28:04,321 INFO L124 PetriNetUnfolderBase]: 5040/7724 cut-off events. [2024-06-27 20:28:04,321 INFO L125 PetriNetUnfolderBase]: For 1614499/1614503 co-relation queries the response was YES. [2024-06-27 20:28:04,417 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77104 conditions, 7724 events. 5040/7724 cut-off events. For 1614499/1614503 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 44924 event pairs, 1414 based on Foata normal form. 5/7728 useless extension candidates. Maximal degree in co-relation 76900. Up to 7528 conditions per place. [2024-06-27 20:28:04,451 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 633 selfloop transitions, 82 changer transitions 0/718 dead transitions. [2024-06-27 20:28:04,451 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 468 places, 718 transitions, 11172 flow [2024-06-27 20:28:04,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:28:04,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:28:04,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 162 transitions. [2024-06-27 20:28:04,452 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38571428571428573 [2024-06-27 20:28:04,452 INFO L175 Difference]: Start difference. First operand has 459 places, 692 transitions, 9559 flow. Second operand 10 states and 162 transitions. [2024-06-27 20:28:04,452 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 468 places, 718 transitions, 11172 flow [2024-06-27 20:28:08,321 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 460 places, 718 transitions, 10853 flow, removed 27 selfloop flow, removed 8 redundant places. [2024-06-27 20:28:08,329 INFO L231 Difference]: Finished difference. Result has 461 places, 698 transitions, 9523 flow [2024-06-27 20:28:08,329 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9263, PETRI_DIFFERENCE_MINUEND_PLACES=451, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=692, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=613, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9523, PETRI_PLACES=461, PETRI_TRANSITIONS=698} [2024-06-27 20:28:08,329 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 418 predicate places. [2024-06-27 20:28:08,329 INFO L495 AbstractCegarLoop]: Abstraction has has 461 places, 698 transitions, 9523 flow [2024-06-27 20:28:08,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 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) [2024-06-27 20:28:08,330 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:28:08,330 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:28:08,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-27 20:28:08,330 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:28:08,330 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:28:08,330 INFO L85 PathProgramCache]: Analyzing trace with hash -275526993, now seen corresponding path program 7 times [2024-06-27 20:28:08,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:28:08,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380646157] [2024-06-27 20:28:08,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:28:08,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:28:08,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:28:09,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:28:09,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:28:09,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380646157] [2024-06-27 20:28:09,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380646157] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:28:09,249 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:28:09,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:28:09,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309845114] [2024-06-27 20:28:09,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:28:09,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:28:09,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:28:09,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:28:09,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:28:09,350 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:28:09,350 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 461 places, 698 transitions, 9523 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 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) [2024-06-27 20:28:09,350 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:28:09,351 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:28:09,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:28:11,798 INFO L124 PetriNetUnfolderBase]: 5037/7720 cut-off events. [2024-06-27 20:28:11,799 INFO L125 PetriNetUnfolderBase]: For 1634778/1634782 co-relation queries the response was YES. [2024-06-27 20:28:11,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76938 conditions, 7720 events. 5037/7720 cut-off events. For 1634778/1634782 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 44885 event pairs, 1414 based on Foata normal form. 5/7724 useless extension candidates. Maximal degree in co-relation 76734. Up to 7524 conditions per place. [2024-06-27 20:28:11,918 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 630 selfloop transitions, 85 changer transitions 0/718 dead transitions. [2024-06-27 20:28:11,918 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 470 places, 718 transitions, 11029 flow [2024-06-27 20:28:11,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:28:11,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:28:11,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 161 transitions. [2024-06-27 20:28:11,919 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38333333333333336 [2024-06-27 20:28:11,919 INFO L175 Difference]: Start difference. First operand has 461 places, 698 transitions, 9523 flow. Second operand 10 states and 161 transitions. [2024-06-27 20:28:11,919 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 470 places, 718 transitions, 11029 flow [2024-06-27 20:28:15,393 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 462 places, 718 transitions, 10803 flow, removed 27 selfloop flow, removed 8 redundant places. [2024-06-27 20:28:15,401 INFO L231 Difference]: Finished difference. Result has 463 places, 698 transitions, 9473 flow [2024-06-27 20:28:15,401 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9297, PETRI_DIFFERENCE_MINUEND_PLACES=453, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=698, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=613, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9473, PETRI_PLACES=463, PETRI_TRANSITIONS=698} [2024-06-27 20:28:15,401 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 420 predicate places. [2024-06-27 20:28:15,401 INFO L495 AbstractCegarLoop]: Abstraction has has 463 places, 698 transitions, 9473 flow [2024-06-27 20:28:15,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 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) [2024-06-27 20:28:15,401 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:28:15,402 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:28:15,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-27 20:28:15,402 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:28:15,402 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:28:15,402 INFO L85 PathProgramCache]: Analyzing trace with hash -275883493, now seen corresponding path program 7 times [2024-06-27 20:28:15,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:28:15,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051150569] [2024-06-27 20:28:15,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:28:15,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:28:15,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:28:16,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:28:16,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:28:16,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051150569] [2024-06-27 20:28:16,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051150569] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:28:16,366 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:28:16,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:28:16,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058908751] [2024-06-27 20:28:16,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:28:16,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:28:16,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:28:16,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:28:16,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:28:16,511 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:28:16,511 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 463 places, 698 transitions, 9473 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:28:16,512 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:28:16,512 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:28:16,512 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:28:18,648 INFO L124 PetriNetUnfolderBase]: 4942/7623 cut-off events. [2024-06-27 20:28:18,648 INFO L125 PetriNetUnfolderBase]: For 1659282/1659286 co-relation queries the response was YES. [2024-06-27 20:28:18,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76432 conditions, 7623 events. 4942/7623 cut-off events. For 1659282/1659286 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 44744 event pairs, 1360 based on Foata normal form. 6/7628 useless extension candidates. Maximal degree in co-relation 76227. Up to 7301 conditions per place. [2024-06-27 20:28:18,780 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 618 selfloop transitions, 59 changer transitions 0/719 dead transitions. [2024-06-27 20:28:18,780 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 472 places, 719 transitions, 10905 flow [2024-06-27 20:28:18,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:28:18,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:28:18,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 167 transitions. [2024-06-27 20:28:18,781 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3976190476190476 [2024-06-27 20:28:18,781 INFO L175 Difference]: Start difference. First operand has 463 places, 698 transitions, 9473 flow. Second operand 10 states and 167 transitions. [2024-06-27 20:28:18,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 472 places, 719 transitions, 10905 flow [2024-06-27 20:28:21,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 463 places, 719 transitions, 10693 flow, removed 14 selfloop flow, removed 9 redundant places. [2024-06-27 20:28:21,783 INFO L231 Difference]: Finished difference. Result has 464 places, 698 transitions, 9384 flow [2024-06-27 20:28:21,784 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9261, PETRI_DIFFERENCE_MINUEND_PLACES=454, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=698, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=639, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9384, PETRI_PLACES=464, PETRI_TRANSITIONS=698} [2024-06-27 20:28:21,784 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 421 predicate places. [2024-06-27 20:28:21,784 INFO L495 AbstractCegarLoop]: Abstraction has has 464 places, 698 transitions, 9384 flow [2024-06-27 20:28:21,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:28:21,785 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:28:21,785 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:28:21,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-27 20:28:21,785 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:28:21,785 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:28:21,786 INFO L85 PathProgramCache]: Analyzing trace with hash -466200315, now seen corresponding path program 8 times [2024-06-27 20:28:21,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:28:21,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687402456] [2024-06-27 20:28:21,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:28:21,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:28:21,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:28:22,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:28:22,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:28:22,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687402456] [2024-06-27 20:28:22,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687402456] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:28:22,971 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:28:22,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:28:22,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521736313] [2024-06-27 20:28:22,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:28:22,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:28:22,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:28:22,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:28:22,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:28:23,112 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:28:23,112 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 464 places, 698 transitions, 9384 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:28:23,112 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:28:23,112 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:28:23,112 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:28:25,009 INFO L124 PetriNetUnfolderBase]: 4956/7640 cut-off events. [2024-06-27 20:28:25,009 INFO L125 PetriNetUnfolderBase]: For 1708079/1708094 co-relation queries the response was YES. [2024-06-27 20:28:25,110 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77056 conditions, 7640 events. 4956/7640 cut-off events. For 1708079/1708094 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 44549 event pairs, 1323 based on Foata normal form. 10/7639 useless extension candidates. Maximal degree in co-relation 76850. Up to 7037 conditions per place. [2024-06-27 20:28:25,144 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 557 selfloop transitions, 133 changer transitions 0/732 dead transitions. [2024-06-27 20:28:25,145 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 472 places, 732 transitions, 11174 flow [2024-06-27 20:28:25,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:28:25,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:28:25,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-27 20:28:25,146 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43915343915343913 [2024-06-27 20:28:25,146 INFO L175 Difference]: Start difference. First operand has 464 places, 698 transitions, 9384 flow. Second operand 9 states and 166 transitions. [2024-06-27 20:28:25,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 472 places, 732 transitions, 11174 flow [2024-06-27 20:28:28,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 464 places, 732 transitions, 11045 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-27 20:28:28,556 INFO L231 Difference]: Finished difference. Result has 465 places, 700 transitions, 9580 flow [2024-06-27 20:28:28,556 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9255, PETRI_DIFFERENCE_MINUEND_PLACES=456, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=698, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=567, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9580, PETRI_PLACES=465, PETRI_TRANSITIONS=700} [2024-06-27 20:28:28,557 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 422 predicate places. [2024-06-27 20:28:28,557 INFO L495 AbstractCegarLoop]: Abstraction has has 465 places, 700 transitions, 9580 flow [2024-06-27 20:28:28,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:28:28,557 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:28:28,557 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:28:28,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-27 20:28:28,557 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:28:28,558 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:28:28,558 INFO L85 PathProgramCache]: Analyzing trace with hash -1811619574, now seen corresponding path program 1 times [2024-06-27 20:28:28,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:28:28,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520519697] [2024-06-27 20:28:28,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:28:28,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:28:28,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:28:29,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:28:29,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:28:29,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520519697] [2024-06-27 20:28:29,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520519697] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:28:29,544 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:28:29,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:28:29,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899624453] [2024-06-27 20:28:29,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:28:29,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:28:29,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:28:29,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:28:29,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:28:29,648 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:28:29,648 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 465 places, 700 transitions, 9580 flow. Second operand has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 states have internal predecessors, (105), 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) [2024-06-27 20:28:29,648 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:28:29,648 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:28:29,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:28:31,881 INFO L124 PetriNetUnfolderBase]: 5050/7740 cut-off events. [2024-06-27 20:28:31,881 INFO L125 PetriNetUnfolderBase]: For 1704090/1704092 co-relation queries the response was YES. [2024-06-27 20:28:31,984 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77741 conditions, 7740 events. 5050/7740 cut-off events. For 1704090/1704092 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 45079 event pairs, 1571 based on Foata normal form. 3/7742 useless extension candidates. Maximal degree in co-relation 77534. Up to 7493 conditions per place. [2024-06-27 20:28:32,019 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 640 selfloop transitions, 101 changer transitions 0/744 dead transitions. [2024-06-27 20:28:32,019 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 475 places, 744 transitions, 11345 flow [2024-06-27 20:28:32,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:28:32,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:28:32,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 180 transitions. [2024-06-27 20:28:32,020 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38961038961038963 [2024-06-27 20:28:32,020 INFO L175 Difference]: Start difference. First operand has 465 places, 700 transitions, 9580 flow. Second operand 11 states and 180 transitions. [2024-06-27 20:28:32,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 475 places, 744 transitions, 11345 flow [2024-06-27 20:28:35,450 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 468 places, 744 transitions, 11110 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-27 20:28:35,457 INFO L231 Difference]: Finished difference. Result has 470 places, 718 transitions, 9773 flow [2024-06-27 20:28:35,458 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9345, PETRI_DIFFERENCE_MINUEND_PLACES=458, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=700, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=611, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9773, PETRI_PLACES=470, PETRI_TRANSITIONS=718} [2024-06-27 20:28:35,458 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 427 predicate places. [2024-06-27 20:28:35,458 INFO L495 AbstractCegarLoop]: Abstraction has has 470 places, 718 transitions, 9773 flow [2024-06-27 20:28:35,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 states have internal predecessors, (105), 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) [2024-06-27 20:28:35,458 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:28:35,458 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:28:35,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-27 20:28:35,458 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:28:35,459 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:28:35,459 INFO L85 PathProgramCache]: Analyzing trace with hash -179054669, now seen corresponding path program 8 times [2024-06-27 20:28:35,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:28:35,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701000709] [2024-06-27 20:28:35,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:28:35,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:28:35,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:28:36,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:28:36,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:28:36,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701000709] [2024-06-27 20:28:36,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701000709] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:28:36,586 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:28:36,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:28:36,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674341877] [2024-06-27 20:28:36,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:28:36,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:28:36,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:28:36,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:28:36,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:28:36,690 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:28:36,691 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 470 places, 718 transitions, 9773 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 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) [2024-06-27 20:28:36,691 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:28:36,691 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:28:36,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:28:38,748 INFO L124 PetriNetUnfolderBase]: 5060/7756 cut-off events. [2024-06-27 20:28:38,749 INFO L125 PetriNetUnfolderBase]: For 1655005/1655007 co-relation queries the response was YES. [2024-06-27 20:28:38,855 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77942 conditions, 7756 events. 5060/7756 cut-off events. For 1655005/1655007 co-relation queries the response was YES. Maximal size of possible extension queue 415. Compared 45151 event pairs, 1555 based on Foata normal form. 3/7758 useless extension candidates. Maximal degree in co-relation 77734. Up to 7433 conditions per place. [2024-06-27 20:28:38,892 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 595 selfloop transitions, 153 changer transitions 0/751 dead transitions. [2024-06-27 20:28:38,892 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 478 places, 751 transitions, 11702 flow [2024-06-27 20:28:38,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:28:38,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:28:38,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-27 20:28:38,893 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41798941798941797 [2024-06-27 20:28:38,893 INFO L175 Difference]: Start difference. First operand has 470 places, 718 transitions, 9773 flow. Second operand 9 states and 158 transitions. [2024-06-27 20:28:38,893 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 478 places, 751 transitions, 11702 flow [2024-06-27 20:28:42,367 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 474 places, 751 transitions, 11608 flow, removed 32 selfloop flow, removed 4 redundant places. [2024-06-27 20:28:42,375 INFO L231 Difference]: Finished difference. Result has 475 places, 724 transitions, 10088 flow [2024-06-27 20:28:42,375 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9679, PETRI_DIFFERENCE_MINUEND_PLACES=466, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=718, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=571, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10088, PETRI_PLACES=475, PETRI_TRANSITIONS=724} [2024-06-27 20:28:42,375 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 432 predicate places. [2024-06-27 20:28:42,376 INFO L495 AbstractCegarLoop]: Abstraction has has 475 places, 724 transitions, 10088 flow [2024-06-27 20:28:42,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 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) [2024-06-27 20:28:42,376 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:28:42,376 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:28:42,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-27 20:28:42,376 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:28:42,377 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:28:42,377 INFO L85 PathProgramCache]: Analyzing trace with hash -465961305, now seen corresponding path program 9 times [2024-06-27 20:28:42,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:28:42,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040784321] [2024-06-27 20:28:42,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:28:42,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:28:42,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:28:43,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:28:43,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:28:43,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040784321] [2024-06-27 20:28:43,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040784321] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:28:43,554 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:28:43,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:28:43,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385798440] [2024-06-27 20:28:43,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:28:43,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:28:43,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:28:43,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:28:43,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:28:43,670 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:28:43,670 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 475 places, 724 transitions, 10088 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:28:43,671 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:28:43,671 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:28:43,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:28:45,756 INFO L124 PetriNetUnfolderBase]: 4985/7688 cut-off events. [2024-06-27 20:28:45,757 INFO L125 PetriNetUnfolderBase]: For 1700533/1700536 co-relation queries the response was YES. [2024-06-27 20:28:45,856 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78217 conditions, 7688 events. 4985/7688 cut-off events. For 1700533/1700536 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 45249 event pairs, 1496 based on Foata normal form. 4/7685 useless extension candidates. Maximal degree in co-relation 78007. Up to 7274 conditions per place. [2024-06-27 20:28:45,889 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 608 selfloop transitions, 103 changer transitions 0/755 dead transitions. [2024-06-27 20:28:45,889 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 483 places, 755 transitions, 11692 flow [2024-06-27 20:28:45,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:28:45,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:28:45,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-27 20:28:45,890 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42592592592592593 [2024-06-27 20:28:45,890 INFO L175 Difference]: Start difference. First operand has 475 places, 724 transitions, 10088 flow. Second operand 9 states and 161 transitions. [2024-06-27 20:28:45,890 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 483 places, 755 transitions, 11692 flow [2024-06-27 20:28:49,803 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 477 places, 755 transitions, 11457 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-27 20:28:49,812 INFO L231 Difference]: Finished difference. Result has 478 places, 728 transitions, 10145 flow [2024-06-27 20:28:49,813 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9853, PETRI_DIFFERENCE_MINUEND_PLACES=469, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=724, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=621, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10145, PETRI_PLACES=478, PETRI_TRANSITIONS=728} [2024-06-27 20:28:49,813 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 435 predicate places. [2024-06-27 20:28:49,813 INFO L495 AbstractCegarLoop]: Abstraction has has 478 places, 728 transitions, 10145 flow [2024-06-27 20:28:49,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:28:49,813 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:28:49,814 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:28:49,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-27 20:28:49,814 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:28:49,814 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:28:49,814 INFO L85 PathProgramCache]: Analyzing trace with hash -1811630734, now seen corresponding path program 2 times [2024-06-27 20:28:49,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:28:49,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655512429] [2024-06-27 20:28:49,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:28:49,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:28:49,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:28:50,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:28:50,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:28:50,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655512429] [2024-06-27 20:28:50,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655512429] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:28:50,782 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:28:50,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:28:50,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656040790] [2024-06-27 20:28:50,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:28:50,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:28:50,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:28:50,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:28:50,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:28:50,914 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:28:50,914 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 478 places, 728 transitions, 10145 flow. Second operand has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 states have internal predecessors, (105), 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) [2024-06-27 20:28:50,914 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:28:50,914 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:28:50,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:28:53,332 INFO L124 PetriNetUnfolderBase]: 5086/7792 cut-off events. [2024-06-27 20:28:53,332 INFO L125 PetriNetUnfolderBase]: For 1682400/1682402 co-relation queries the response was YES. [2024-06-27 20:28:53,430 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78593 conditions, 7792 events. 5086/7792 cut-off events. For 1682400/1682402 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 45410 event pairs, 1574 based on Foata normal form. 3/7794 useless extension candidates. Maximal degree in co-relation 78383. Up to 7534 conditions per place. [2024-06-27 20:28:53,463 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 649 selfloop transitions, 108 changer transitions 0/760 dead transitions. [2024-06-27 20:28:53,464 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 488 places, 760 transitions, 11839 flow [2024-06-27 20:28:53,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:28:53,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:28:53,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 182 transitions. [2024-06-27 20:28:53,465 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3939393939393939 [2024-06-27 20:28:53,465 INFO L175 Difference]: Start difference. First operand has 478 places, 728 transitions, 10145 flow. Second operand 11 states and 182 transitions. [2024-06-27 20:28:53,465 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 488 places, 760 transitions, 11839 flow [2024-06-27 20:28:57,036 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 480 places, 760 transitions, 11619 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-06-27 20:28:57,046 INFO L231 Difference]: Finished difference. Result has 482 places, 734 transitions, 10248 flow [2024-06-27 20:28:57,046 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9925, PETRI_DIFFERENCE_MINUEND_PLACES=470, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=728, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=620, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=10248, PETRI_PLACES=482, PETRI_TRANSITIONS=734} [2024-06-27 20:28:57,047 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 439 predicate places. [2024-06-27 20:28:57,047 INFO L495 AbstractCegarLoop]: Abstraction has has 482 places, 734 transitions, 10248 flow [2024-06-27 20:28:57,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 states have internal predecessors, (105), 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) [2024-06-27 20:28:57,047 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:28:57,047 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:28:57,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-27 20:28:57,047 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:28:57,048 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:28:57,048 INFO L85 PathProgramCache]: Analyzing trace with hash 507250345, now seen corresponding path program 9 times [2024-06-27 20:28:57,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:28:57,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770027597] [2024-06-27 20:28:57,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:28:57,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:28:57,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:28:58,098 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:28:58,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:28:58,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770027597] [2024-06-27 20:28:58,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770027597] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:28:58,098 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:28:58,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:28:58,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568212853] [2024-06-27 20:28:58,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:28:58,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:28:58,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:28:58,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:28:58,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:28:58,182 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:28:58,182 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 482 places, 734 transitions, 10248 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 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) [2024-06-27 20:28:58,182 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:28:58,182 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:28:58,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:29:00,328 INFO L124 PetriNetUnfolderBase]: 4998/7705 cut-off events. [2024-06-27 20:29:00,329 INFO L125 PetriNetUnfolderBase]: For 1694060/1694063 co-relation queries the response was YES. [2024-06-27 20:29:00,421 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78716 conditions, 7705 events. 4998/7705 cut-off events. For 1694060/1694063 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 45395 event pairs, 1506 based on Foata normal form. 4/7702 useless extension candidates. Maximal degree in co-relation 78505. Up to 7313 conditions per place. [2024-06-27 20:29:00,452 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 615 selfloop transitions, 101 changer transitions 0/761 dead transitions. [2024-06-27 20:29:00,452 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 489 places, 761 transitions, 12084 flow [2024-06-27 20:29:00,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:29:00,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:29:00,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-27 20:29:00,453 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43452380952380953 [2024-06-27 20:29:00,453 INFO L175 Difference]: Start difference. First operand has 482 places, 734 transitions, 10248 flow. Second operand 8 states and 146 transitions. [2024-06-27 20:29:00,453 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 489 places, 761 transitions, 12084 flow [2024-06-27 20:29:04,103 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 481 places, 761 transitions, 11811 flow, removed 37 selfloop flow, removed 8 redundant places. [2024-06-27 20:29:04,111 INFO L231 Difference]: Finished difference. Result has 482 places, 737 transitions, 10265 flow [2024-06-27 20:29:04,111 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9975, PETRI_DIFFERENCE_MINUEND_PLACES=474, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=734, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=636, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10265, PETRI_PLACES=482, PETRI_TRANSITIONS=737} [2024-06-27 20:29:04,111 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 439 predicate places. [2024-06-27 20:29:04,111 INFO L495 AbstractCegarLoop]: Abstraction has has 482 places, 737 transitions, 10265 flow [2024-06-27 20:29:04,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 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) [2024-06-27 20:29:04,112 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:29:04,112 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:29:04,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-27 20:29:04,112 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:29:04,112 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:29:04,112 INFO L85 PathProgramCache]: Analyzing trace with hash -176284323, now seen corresponding path program 10 times [2024-06-27 20:29:04,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:29:04,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732254580] [2024-06-27 20:29:04,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:29:04,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:29:04,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:29:05,041 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:29:05,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:29:05,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732254580] [2024-06-27 20:29:05,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732254580] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:29:05,042 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:29:05,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:29:05,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791999021] [2024-06-27 20:29:05,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:29:05,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:29:05,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:29:05,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:29:05,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:29:05,139 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:29:05,139 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 482 places, 737 transitions, 10265 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 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) [2024-06-27 20:29:05,140 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:29:05,140 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:29:05,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:29:07,426 INFO L124 PetriNetUnfolderBase]: 5003/7712 cut-off events. [2024-06-27 20:29:07,426 INFO L125 PetriNetUnfolderBase]: For 1714027/1714030 co-relation queries the response was YES. [2024-06-27 20:29:07,520 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78999 conditions, 7712 events. 5003/7712 cut-off events. For 1714027/1714030 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 45408 event pairs, 1497 based on Foata normal form. 3/7708 useless extension candidates. Maximal degree in co-relation 78787. Up to 7319 conditions per place. [2024-06-27 20:29:07,552 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 613 selfloop transitions, 108 changer transitions 0/766 dead transitions. [2024-06-27 20:29:07,552 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 491 places, 766 transitions, 12123 flow [2024-06-27 20:29:07,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:29:07,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:29:07,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 172 transitions. [2024-06-27 20:29:07,553 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4095238095238095 [2024-06-27 20:29:07,553 INFO L175 Difference]: Start difference. First operand has 482 places, 737 transitions, 10265 flow. Second operand 10 states and 172 transitions. [2024-06-27 20:29:07,553 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 491 places, 766 transitions, 12123 flow [2024-06-27 20:29:11,350 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 485 places, 766 transitions, 11938 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-27 20:29:11,358 INFO L231 Difference]: Finished difference. Result has 486 places, 740 transitions, 10386 flow [2024-06-27 20:29:11,358 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10087, PETRI_DIFFERENCE_MINUEND_PLACES=476, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=737, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=632, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10386, PETRI_PLACES=486, PETRI_TRANSITIONS=740} [2024-06-27 20:29:11,358 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 443 predicate places. [2024-06-27 20:29:11,358 INFO L495 AbstractCegarLoop]: Abstraction has has 486 places, 740 transitions, 10386 flow [2024-06-27 20:29:11,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 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) [2024-06-27 20:29:11,358 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:29:11,359 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:29:11,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-27 20:29:11,359 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:29:11,359 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:29:11,359 INFO L85 PathProgramCache]: Analyzing trace with hash -170722799, now seen corresponding path program 9 times [2024-06-27 20:29:11,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:29:11,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308030037] [2024-06-27 20:29:11,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:29:11,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:29:11,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:29:12,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:29:12,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:29:12,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308030037] [2024-06-27 20:29:12,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308030037] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:29:12,539 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:29:12,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:29:12,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330306245] [2024-06-27 20:29:12,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:29:12,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:29:12,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:29:12,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:29:12,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:29:12,624 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:29:12,624 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 486 places, 740 transitions, 10386 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 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) [2024-06-27 20:29:12,624 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:29:12,624 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:29:12,624 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:29:14,792 INFO L124 PetriNetUnfolderBase]: 5111/7827 cut-off events. [2024-06-27 20:29:14,792 INFO L125 PetriNetUnfolderBase]: For 1682252/1682254 co-relation queries the response was YES. [2024-06-27 20:29:14,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79407 conditions, 7827 events. 5111/7827 cut-off events. For 1682252/1682254 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 45642 event pairs, 1570 based on Foata normal form. 3/7829 useless extension candidates. Maximal degree in co-relation 79195. Up to 7595 conditions per place. [2024-06-27 20:29:14,918 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 649 selfloop transitions, 119 changer transitions 0/771 dead transitions. [2024-06-27 20:29:14,918 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 494 places, 771 transitions, 12395 flow [2024-06-27 20:29:14,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:29:14,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:29:14,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-27 20:29:14,919 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4021164021164021 [2024-06-27 20:29:14,919 INFO L175 Difference]: Start difference. First operand has 486 places, 740 transitions, 10386 flow. Second operand 9 states and 152 transitions. [2024-06-27 20:29:14,919 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 494 places, 771 transitions, 12395 flow [2024-06-27 20:29:19,000 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 484 places, 771 transitions, 12117 flow, removed 23 selfloop flow, removed 10 redundant places. [2024-06-27 20:29:19,008 INFO L231 Difference]: Finished difference. Result has 485 places, 749 transitions, 10523 flow [2024-06-27 20:29:19,008 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10112, PETRI_DIFFERENCE_MINUEND_PLACES=476, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=740, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=627, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10523, PETRI_PLACES=485, PETRI_TRANSITIONS=749} [2024-06-27 20:29:19,009 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 442 predicate places. [2024-06-27 20:29:19,009 INFO L495 AbstractCegarLoop]: Abstraction has has 485 places, 749 transitions, 10523 flow [2024-06-27 20:29:19,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 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) [2024-06-27 20:29:19,009 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:29:19,009 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:29:19,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-27 20:29:19,010 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:29:19,010 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:29:19,010 INFO L85 PathProgramCache]: Analyzing trace with hash 106343731, now seen corresponding path program 10 times [2024-06-27 20:29:19,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:29:19,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550920539] [2024-06-27 20:29:19,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:29:19,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:29:19,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:29:20,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:29:20,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:29:20,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550920539] [2024-06-27 20:29:20,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550920539] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:29:20,242 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:29:20,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:29:20,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049069873] [2024-06-27 20:29:20,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:29:20,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:29:20,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:29:20,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:29:20,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:29:20,342 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:29:20,342 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 485 places, 749 transitions, 10523 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 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) [2024-06-27 20:29:20,342 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:29:20,342 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:29:20,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:29:22,486 INFO L124 PetriNetUnfolderBase]: 5108/7823 cut-off events. [2024-06-27 20:29:22,486 INFO L125 PetriNetUnfolderBase]: For 1648249/1648251 co-relation queries the response was YES. [2024-06-27 20:29:22,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78995 conditions, 7823 events. 5108/7823 cut-off events. For 1648249/1648251 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 45588 event pairs, 1574 based on Foata normal form. 3/7825 useless extension candidates. Maximal degree in co-relation 78784. Up to 7616 conditions per place. [2024-06-27 20:29:22,622 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 668 selfloop transitions, 99 changer transitions 0/770 dead transitions. [2024-06-27 20:29:22,622 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 493 places, 770 transitions, 12147 flow [2024-06-27 20:29:22,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:29:22,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:29:22,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-06-27 20:29:22,623 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3941798941798942 [2024-06-27 20:29:22,623 INFO L175 Difference]: Start difference. First operand has 485 places, 749 transitions, 10523 flow. Second operand 9 states and 149 transitions. [2024-06-27 20:29:22,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 493 places, 770 transitions, 12147 flow [2024-06-27 20:29:26,453 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 487 places, 770 transitions, 11970 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-27 20:29:26,463 INFO L231 Difference]: Finished difference. Result has 488 places, 749 transitions, 10562 flow [2024-06-27 20:29:26,464 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10346, PETRI_DIFFERENCE_MINUEND_PLACES=479, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=749, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=650, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10562, PETRI_PLACES=488, PETRI_TRANSITIONS=749} [2024-06-27 20:29:26,464 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 445 predicate places. [2024-06-27 20:29:26,464 INFO L495 AbstractCegarLoop]: Abstraction has has 488 places, 749 transitions, 10562 flow [2024-06-27 20:29:26,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 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) [2024-06-27 20:29:26,465 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:29:26,465 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:29:26,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-27 20:29:26,465 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:29:26,465 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:29:26,465 INFO L85 PathProgramCache]: Analyzing trace with hash -170723109, now seen corresponding path program 10 times [2024-06-27 20:29:26,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:29:26,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444923432] [2024-06-27 20:29:26,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:29:26,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:29:26,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:29:27,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:29:27,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:29:27,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444923432] [2024-06-27 20:29:27,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444923432] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:29:27,751 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:29:27,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:29:27,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079346889] [2024-06-27 20:29:27,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:29:27,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:29:27,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:29:27,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:29:27,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:29:27,899 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:29:27,899 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 488 places, 749 transitions, 10562 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:29:27,899 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:29:27,899 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:29:27,899 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:29:30,054 INFO L124 PetriNetUnfolderBase]: 5021/7739 cut-off events. [2024-06-27 20:29:30,054 INFO L125 PetriNetUnfolderBase]: For 1659289/1659291 co-relation queries the response was YES. [2024-06-27 20:29:30,158 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78768 conditions, 7739 events. 5021/7739 cut-off events. For 1659289/1659291 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 45628 event pairs, 1511 based on Foata normal form. 4/7739 useless extension candidates. Maximal degree in co-relation 78557. Up to 7381 conditions per place. [2024-06-27 20:29:30,194 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 651 selfloop transitions, 74 changer transitions 0/773 dead transitions. [2024-06-27 20:29:30,195 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 496 places, 773 transitions, 12146 flow [2024-06-27 20:29:30,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:29:30,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:29:30,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-27 20:29:30,195 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4074074074074074 [2024-06-27 20:29:30,195 INFO L175 Difference]: Start difference. First operand has 488 places, 749 transitions, 10562 flow. Second operand 9 states and 154 transitions. [2024-06-27 20:29:30,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 496 places, 773 transitions, 12146 flow [2024-06-27 20:29:34,224 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 487 places, 773 transitions, 11908 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-06-27 20:29:34,232 INFO L231 Difference]: Finished difference. Result has 488 places, 751 transitions, 10532 flow [2024-06-27 20:29:34,232 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10324, PETRI_DIFFERENCE_MINUEND_PLACES=479, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=749, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=675, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10532, PETRI_PLACES=488, PETRI_TRANSITIONS=751} [2024-06-27 20:29:34,233 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 445 predicate places. [2024-06-27 20:29:34,233 INFO L495 AbstractCegarLoop]: Abstraction has has 488 places, 751 transitions, 10532 flow [2024-06-27 20:29:34,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:29:34,233 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:29:34,233 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:29:34,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-27 20:29:34,234 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:29:34,234 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:29:34,234 INFO L85 PathProgramCache]: Analyzing trace with hash -347755143, now seen corresponding path program 4 times [2024-06-27 20:29:34,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:29:34,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451694135] [2024-06-27 20:29:34,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:29:34,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:29:34,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:29:35,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:29:35,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:29:35,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451694135] [2024-06-27 20:29:35,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451694135] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:29:35,191 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:29:35,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:29:35,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931143988] [2024-06-27 20:29:35,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:29:35,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:29:35,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:29:35,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:29:35,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:29:35,288 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:29:35,288 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 488 places, 751 transitions, 10532 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 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) [2024-06-27 20:29:35,289 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:29:35,289 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:29:35,289 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:29:37,540 INFO L124 PetriNetUnfolderBase]: 5044/7767 cut-off events. [2024-06-27 20:29:37,541 INFO L125 PetriNetUnfolderBase]: For 1672674/1672678 co-relation queries the response was YES. [2024-06-27 20:29:37,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79044 conditions, 7767 events. 5044/7767 cut-off events. For 1672674/1672678 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 45604 event pairs, 1470 based on Foata normal form. 6/7772 useless extension candidates. Maximal degree in co-relation 78833. Up to 7331 conditions per place. [2024-06-27 20:29:37,672 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 668 selfloop transitions, 73 changer transitions 0/789 dead transitions. [2024-06-27 20:29:37,672 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 495 places, 789 transitions, 12415 flow [2024-06-27 20:29:37,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:29:37,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:29:37,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-27 20:29:37,673 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43154761904761907 [2024-06-27 20:29:37,673 INFO L175 Difference]: Start difference. First operand has 488 places, 751 transitions, 10532 flow. Second operand 8 states and 145 transitions. [2024-06-27 20:29:37,673 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 495 places, 789 transitions, 12415 flow [2024-06-27 20:29:41,727 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 487 places, 789 transitions, 12245 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-06-27 20:29:41,737 INFO L231 Difference]: Finished difference. Result has 488 places, 759 transitions, 10721 flow [2024-06-27 20:29:41,738 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10362, PETRI_DIFFERENCE_MINUEND_PLACES=480, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=751, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=678, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10721, PETRI_PLACES=488, PETRI_TRANSITIONS=759} [2024-06-27 20:29:41,738 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 445 predicate places. [2024-06-27 20:29:41,738 INFO L495 AbstractCegarLoop]: Abstraction has has 488 places, 759 transitions, 10721 flow [2024-06-27 20:29:41,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 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) [2024-06-27 20:29:41,738 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:29:41,739 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:29:41,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-27 20:29:41,739 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:29:41,739 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:29:41,739 INFO L85 PathProgramCache]: Analyzing trace with hash -348049209, now seen corresponding path program 11 times [2024-06-27 20:29:41,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:29:41,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943935540] [2024-06-27 20:29:41,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:29:41,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:29:41,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:29:42,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:29:42,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:29:42,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943935540] [2024-06-27 20:29:42,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943935540] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:29:42,755 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:29:42,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:29:42,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88463365] [2024-06-27 20:29:42,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:29:42,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:29:42,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:29:42,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:29:42,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:29:42,850 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:29:42,850 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 488 places, 759 transitions, 10721 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 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) [2024-06-27 20:29:42,850 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:29:42,850 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:29:42,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:29:45,039 INFO L124 PetriNetUnfolderBase]: 5069/7803 cut-off events. [2024-06-27 20:29:45,039 INFO L125 PetriNetUnfolderBase]: For 1675374/1675380 co-relation queries the response was YES. [2024-06-27 20:29:45,136 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80104 conditions, 7803 events. 5069/7803 cut-off events. For 1675374/1675380 co-relation queries the response was YES. Maximal size of possible extension queue 439. Compared 45900 event pairs, 1354 based on Foata normal form. 8/7810 useless extension candidates. Maximal degree in co-relation 79893. Up to 7250 conditions per place. [2024-06-27 20:29:45,170 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 576 selfloop transitions, 173 changer transitions 0/797 dead transitions. [2024-06-27 20:29:45,170 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 495 places, 797 transitions, 13349 flow [2024-06-27 20:29:45,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:29:45,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:29:45,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-27 20:29:45,171 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44345238095238093 [2024-06-27 20:29:45,171 INFO L175 Difference]: Start difference. First operand has 488 places, 759 transitions, 10721 flow. Second operand 8 states and 149 transitions. [2024-06-27 20:29:45,171 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 495 places, 797 transitions, 13349 flow [2024-06-27 20:29:49,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 489 places, 797 transitions, 13093 flow, removed 63 selfloop flow, removed 6 redundant places. [2024-06-27 20:29:49,657 INFO L231 Difference]: Finished difference. Result has 490 places, 771 transitions, 11113 flow [2024-06-27 20:29:49,657 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10465, PETRI_DIFFERENCE_MINUEND_PLACES=482, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=759, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=598, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11113, PETRI_PLACES=490, PETRI_TRANSITIONS=771} [2024-06-27 20:29:49,658 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 447 predicate places. [2024-06-27 20:29:49,658 INFO L495 AbstractCegarLoop]: Abstraction has has 490 places, 771 transitions, 11113 flow [2024-06-27 20:29:49,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 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) [2024-06-27 20:29:49,658 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:29:49,658 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:29:49,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-27 20:29:49,658 INFO L420 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:29:49,659 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:29:49,659 INFO L85 PathProgramCache]: Analyzing trace with hash -347750307, now seen corresponding path program 4 times [2024-06-27 20:29:49,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:29:49,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198469050] [2024-06-27 20:29:49,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:29:49,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:29:49,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:29:50,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:29:50,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:29:50,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198469050] [2024-06-27 20:29:50,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198469050] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:29:50,570 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:29:50,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:29:50,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837777635] [2024-06-27 20:29:50,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:29:50,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:29:50,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:29:50,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:29:50,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:29:50,641 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:29:50,641 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 490 places, 771 transitions, 11113 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 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) [2024-06-27 20:29:50,641 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:29:50,641 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:29:50,641 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:29:53,420 INFO L124 PetriNetUnfolderBase]: 5180/7920 cut-off events. [2024-06-27 20:29:53,420 INFO L125 PetriNetUnfolderBase]: For 1705345/1705349 co-relation queries the response was YES. [2024-06-27 20:29:53,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81140 conditions, 7920 events. 5180/7920 cut-off events. For 1705345/1705349 co-relation queries the response was YES. Maximal size of possible extension queue 442. Compared 46180 event pairs, 1598 based on Foata normal form. 6/7925 useless extension candidates. Maximal degree in co-relation 80928. Up to 7684 conditions per place. [2024-06-27 20:29:53,546 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 696 selfloop transitions, 102 changer transitions 0/801 dead transitions. [2024-06-27 20:29:53,547 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 497 places, 801 transitions, 13420 flow [2024-06-27 20:29:53,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:29:53,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:29:53,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-27 20:29:53,547 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4107142857142857 [2024-06-27 20:29:53,548 INFO L175 Difference]: Start difference. First operand has 490 places, 771 transitions, 11113 flow. Second operand 8 states and 138 transitions. [2024-06-27 20:29:53,548 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 497 places, 801 transitions, 13420 flow [2024-06-27 20:29:57,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 492 places, 801 transitions, 13003 flow, removed 86 selfloop flow, removed 5 redundant places. [2024-06-27 20:29:57,966 INFO L231 Difference]: Finished difference. Result has 493 places, 780 transitions, 11054 flow [2024-06-27 20:29:57,967 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10700, PETRI_DIFFERENCE_MINUEND_PLACES=485, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=771, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=678, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11054, PETRI_PLACES=493, PETRI_TRANSITIONS=780} [2024-06-27 20:29:57,967 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 450 predicate places. [2024-06-27 20:29:57,967 INFO L495 AbstractCegarLoop]: Abstraction has has 493 places, 780 transitions, 11054 flow [2024-06-27 20:29:57,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 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) [2024-06-27 20:29:57,967 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:29:57,967 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:29:57,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-27 20:29:57,967 INFO L420 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:29:57,968 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:29:57,968 INFO L85 PathProgramCache]: Analyzing trace with hash -347750679, now seen corresponding path program 12 times [2024-06-27 20:29:57,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:29:57,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416349648] [2024-06-27 20:29:57,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:29:57,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:29:57,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:29:58,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:29:58,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:29:58,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416349648] [2024-06-27 20:29:58,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416349648] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:29:58,885 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:29:58,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:29:58,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762448354] [2024-06-27 20:29:58,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:29:58,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:29:58,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:29:58,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:29:58,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:29:58,990 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:29:58,990 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 493 places, 780 transitions, 11054 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 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) [2024-06-27 20:29:58,990 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:29:58,990 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:29:58,990 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:30:01,629 INFO L124 PetriNetUnfolderBase]: 5089/7831 cut-off events. [2024-06-27 20:30:01,629 INFO L125 PetriNetUnfolderBase]: For 1702203/1702209 co-relation queries the response was YES. [2024-06-27 20:30:01,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80284 conditions, 7831 events. 5089/7831 cut-off events. For 1702203/1702209 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 46090 event pairs, 1376 based on Foata normal form. 8/7838 useless extension candidates. Maximal degree in co-relation 80072. Up to 7271 conditions per place. [2024-06-27 20:30:01,758 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 575 selfloop transitions, 179 changer transitions 0/805 dead transitions. [2024-06-27 20:30:01,758 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 500 places, 805 transitions, 13208 flow [2024-06-27 20:30:01,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:30:01,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:30:01,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-27 20:30:01,759 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43154761904761907 [2024-06-27 20:30:01,759 INFO L175 Difference]: Start difference. First operand has 493 places, 780 transitions, 11054 flow. Second operand 8 states and 145 transitions. [2024-06-27 20:30:01,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 500 places, 805 transitions, 13208 flow [2024-06-27 20:30:06,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 494 places, 805 transitions, 13015 flow, removed 35 selfloop flow, removed 6 redundant places. [2024-06-27 20:30:06,466 INFO L231 Difference]: Finished difference. Result has 495 places, 783 transitions, 11289 flow [2024-06-27 20:30:06,466 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10865, PETRI_DIFFERENCE_MINUEND_PLACES=487, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=780, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=176, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=604, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11289, PETRI_PLACES=495, PETRI_TRANSITIONS=783} [2024-06-27 20:30:06,466 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 452 predicate places. [2024-06-27 20:30:06,466 INFO L495 AbstractCegarLoop]: Abstraction has has 495 places, 783 transitions, 11289 flow [2024-06-27 20:30:06,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 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) [2024-06-27 20:30:06,466 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:30:06,466 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:30:06,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-27 20:30:06,466 INFO L420 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:30:06,467 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:30:06,467 INFO L85 PathProgramCache]: Analyzing trace with hash -347750493, now seen corresponding path program 5 times [2024-06-27 20:30:06,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:30:06,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416644724] [2024-06-27 20:30:06,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:30:06,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:30:06,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:30:07,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:30:07,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:30:07,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416644724] [2024-06-27 20:30:07,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416644724] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:30:07,412 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:30:07,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:30:07,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87669815] [2024-06-27 20:30:07,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:30:07,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:30:07,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:30:07,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:30:07,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:30:07,504 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:30:07,505 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 495 places, 783 transitions, 11289 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 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) [2024-06-27 20:30:07,505 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:30:07,505 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:30:07,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:30:09,979 INFO L124 PetriNetUnfolderBase]: 5133/7891 cut-off events. [2024-06-27 20:30:09,979 INFO L125 PetriNetUnfolderBase]: For 1738927/1738931 co-relation queries the response was YES. [2024-06-27 20:30:10,264 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81499 conditions, 7891 events. 5133/7891 cut-off events. For 1738927/1738931 co-relation queries the response was YES. Maximal size of possible extension queue 446. Compared 46415 event pairs, 1484 based on Foata normal form. 6/7896 useless extension candidates. Maximal degree in co-relation 81287. Up to 7309 conditions per place. [2024-06-27 20:30:10,305 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 653 selfloop transitions, 127 changer transitions 0/831 dead transitions. [2024-06-27 20:30:10,305 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 502 places, 831 transitions, 13954 flow [2024-06-27 20:30:10,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:30:10,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:30:10,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-27 20:30:10,306 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2024-06-27 20:30:10,306 INFO L175 Difference]: Start difference. First operand has 495 places, 783 transitions, 11289 flow. Second operand 8 states and 150 transitions. [2024-06-27 20:30:10,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 502 places, 831 transitions, 13954 flow [2024-06-27 20:30:15,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 496 places, 831 transitions, 13613 flow, removed 35 selfloop flow, removed 6 redundant places. [2024-06-27 20:30:15,145 INFO L231 Difference]: Finished difference. Result has 497 places, 799 transitions, 11639 flow [2024-06-27 20:30:15,145 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10952, PETRI_DIFFERENCE_MINUEND_PLACES=489, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=783, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=669, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11639, PETRI_PLACES=497, PETRI_TRANSITIONS=799} [2024-06-27 20:30:15,145 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 454 predicate places. [2024-06-27 20:30:15,145 INFO L495 AbstractCegarLoop]: Abstraction has has 497 places, 799 transitions, 11639 flow [2024-06-27 20:30:15,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 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) [2024-06-27 20:30:15,146 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:30:15,146 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:30:15,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-27 20:30:15,146 INFO L420 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:30:15,146 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:30:15,146 INFO L85 PathProgramCache]: Analyzing trace with hash 1391029445, now seen corresponding path program 13 times [2024-06-27 20:30:15,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:30:15,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943209383] [2024-06-27 20:30:15,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:30:15,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:30:15,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:30:16,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:30:16,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:30:16,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943209383] [2024-06-27 20:30:16,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943209383] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:30:16,128 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:30:16,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:30:16,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962900996] [2024-06-27 20:30:16,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:30:16,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:30:16,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:30:16,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:30:16,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:30:16,240 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:30:16,240 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 497 places, 799 transitions, 11639 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 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) [2024-06-27 20:30:16,240 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:30:16,240 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:30:16,240 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:30:18,810 INFO L124 PetriNetUnfolderBase]: 5139/7902 cut-off events. [2024-06-27 20:30:18,811 INFO L125 PetriNetUnfolderBase]: For 1723565/1723569 co-relation queries the response was YES. [2024-06-27 20:30:18,905 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81913 conditions, 7902 events. 5139/7902 cut-off events. For 1723565/1723569 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 46547 event pairs, 1356 based on Foata normal form. 5/7906 useless extension candidates. Maximal degree in co-relation 81701. Up to 7564 conditions per place. [2024-06-27 20:30:18,939 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 707 selfloop transitions, 59 changer transitions 0/817 dead transitions. [2024-06-27 20:30:18,939 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 504 places, 817 transitions, 13301 flow [2024-06-27 20:30:18,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:30:18,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:30:18,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-27 20:30:18,940 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-27 20:30:18,940 INFO L175 Difference]: Start difference. First operand has 497 places, 799 transitions, 11639 flow. Second operand 8 states and 136 transitions. [2024-06-27 20:30:18,940 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 504 places, 817 transitions, 13301 flow [2024-06-27 20:30:23,410 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 500 places, 817 transitions, 13048 flow, removed 100 selfloop flow, removed 4 redundant places. [2024-06-27 20:30:23,418 INFO L231 Difference]: Finished difference. Result has 501 places, 802 transitions, 11588 flow [2024-06-27 20:30:23,418 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11386, PETRI_DIFFERENCE_MINUEND_PLACES=493, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=799, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=740, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11588, PETRI_PLACES=501, PETRI_TRANSITIONS=802} [2024-06-27 20:30:23,419 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 458 predicate places. [2024-06-27 20:30:23,419 INFO L495 AbstractCegarLoop]: Abstraction has has 501 places, 802 transitions, 11588 flow [2024-06-27 20:30:23,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 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) [2024-06-27 20:30:23,419 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:30:23,419 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:30:23,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-27 20:30:23,420 INFO L420 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:30:23,420 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:30:23,420 INFO L85 PathProgramCache]: Analyzing trace with hash -170381637, now seen corresponding path program 5 times [2024-06-27 20:30:23,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:30:23,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997454952] [2024-06-27 20:30:23,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:30:23,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:30:23,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:30:24,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:30:24,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:30:24,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997454952] [2024-06-27 20:30:24,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997454952] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:30:24,476 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:30:24,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:30:24,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939420581] [2024-06-27 20:30:24,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:30:24,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:30:24,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:30:24,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:30:24,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:30:24,564 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:30:24,565 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 501 places, 802 transitions, 11588 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 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) [2024-06-27 20:30:24,565 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:30:24,565 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:30:24,565 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:30:27,090 INFO L124 PetriNetUnfolderBase]: 5252/8015 cut-off events. [2024-06-27 20:30:27,090 INFO L125 PetriNetUnfolderBase]: For 1731469/1731473 co-relation queries the response was YES. [2024-06-27 20:30:27,188 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82658 conditions, 8015 events. 5252/8015 cut-off events. For 1731469/1731473 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 46660 event pairs, 1584 based on Foata normal form. 5/8019 useless extension candidates. Maximal degree in co-relation 82445. Up to 7779 conditions per place. [2024-06-27 20:30:27,222 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 711 selfloop transitions, 115 changer transitions 0/829 dead transitions. [2024-06-27 20:30:27,222 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 508 places, 829 transitions, 13923 flow [2024-06-27 20:30:27,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:30:27,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:30:27,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-27 20:30:27,223 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4017857142857143 [2024-06-27 20:30:27,223 INFO L175 Difference]: Start difference. First operand has 501 places, 802 transitions, 11588 flow. Second operand 8 states and 135 transitions. [2024-06-27 20:30:27,223 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 508 places, 829 transitions, 13923 flow [2024-06-27 20:30:31,862 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 501 places, 829 transitions, 13771 flow, removed 19 selfloop flow, removed 7 redundant places. [2024-06-27 20:30:31,871 INFO L231 Difference]: Finished difference. Result has 502 places, 812 transitions, 11833 flow [2024-06-27 20:30:31,872 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11440, PETRI_DIFFERENCE_MINUEND_PLACES=494, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=802, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=697, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11833, PETRI_PLACES=502, PETRI_TRANSITIONS=812} [2024-06-27 20:30:31,872 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 459 predicate places. [2024-06-27 20:30:31,872 INFO L495 AbstractCegarLoop]: Abstraction has has 502 places, 812 transitions, 11833 flow [2024-06-27 20:30:31,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 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) [2024-06-27 20:30:31,872 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:30:31,872 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:30:31,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-27 20:30:31,872 INFO L420 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:30:31,873 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:30:31,873 INFO L85 PathProgramCache]: Analyzing trace with hash -170618787, now seen corresponding path program 6 times [2024-06-27 20:30:31,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:30:31,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937887037] [2024-06-27 20:30:31,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:30:31,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:30:31,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:30:32,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:30:32,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:30:32,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937887037] [2024-06-27 20:30:32,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937887037] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:30:32,919 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:30:32,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:30:32,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147455818] [2024-06-27 20:30:32,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:30:32,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:30:32,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:30:32,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:30:32,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:30:32,989 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:30:32,989 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 502 places, 812 transitions, 11833 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 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) [2024-06-27 20:30:32,990 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:30:32,990 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:30:32,990 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:30:35,553 INFO L124 PetriNetUnfolderBase]: 5249/8011 cut-off events. [2024-06-27 20:30:35,554 INFO L125 PetriNetUnfolderBase]: For 1724719/1724723 co-relation queries the response was YES. [2024-06-27 20:30:35,662 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82627 conditions, 8011 events. 5249/8011 cut-off events. For 1724719/1724723 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 46651 event pairs, 1579 based on Foata normal form. 5/8015 useless extension candidates. Maximal degree in co-relation 82414. Up to 7776 conditions per place. [2024-06-27 20:30:35,706 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 716 selfloop transitions, 110 changer transitions 0/829 dead transitions. [2024-06-27 20:30:35,706 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 509 places, 829 transitions, 14015 flow [2024-06-27 20:30:35,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:30:35,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:30:35,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-27 20:30:35,707 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-27 20:30:35,707 INFO L175 Difference]: Start difference. First operand has 502 places, 812 transitions, 11833 flow. Second operand 8 states and 136 transitions. [2024-06-27 20:30:35,707 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 509 places, 829 transitions, 14015 flow [2024-06-27 20:30:39,931 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 504 places, 829 transitions, 13812 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-27 20:30:39,940 INFO L231 Difference]: Finished difference. Result has 505 places, 812 transitions, 11864 flow [2024-06-27 20:30:39,940 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11634, PETRI_DIFFERENCE_MINUEND_PLACES=497, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=812, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=702, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11864, PETRI_PLACES=505, PETRI_TRANSITIONS=812} [2024-06-27 20:30:39,940 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 462 predicate places. [2024-06-27 20:30:39,940 INFO L495 AbstractCegarLoop]: Abstraction has has 505 places, 812 transitions, 11864 flow [2024-06-27 20:30:39,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 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) [2024-06-27 20:30:39,940 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:30:39,941 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:30:39,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-27 20:30:39,941 INFO L420 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:30:39,941 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:30:39,941 INFO L85 PathProgramCache]: Analyzing trace with hash -170618973, now seen corresponding path program 6 times [2024-06-27 20:30:39,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:30:39,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532345060] [2024-06-27 20:30:39,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:30:39,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:30:39,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:30:40,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:30:40,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:30:40,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532345060] [2024-06-27 20:30:40,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532345060] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:30:40,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:30:40,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:30:40,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393811940] [2024-06-27 20:30:40,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:30:40,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:30:40,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:30:40,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:30:40,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:30:41,034 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:30:41,035 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 505 places, 812 transitions, 11864 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 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) [2024-06-27 20:30:41,035 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:30:41,035 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:30:41,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:30:43,701 INFO L124 PetriNetUnfolderBase]: 5184/7957 cut-off events. [2024-06-27 20:30:43,701 INFO L125 PetriNetUnfolderBase]: For 1750383/1750387 co-relation queries the response was YES. [2024-06-27 20:30:43,799 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82783 conditions, 7957 events. 5184/7957 cut-off events. For 1750383/1750387 co-relation queries the response was YES. Maximal size of possible extension queue 453. Compared 46734 event pairs, 1487 based on Foata normal form. 4/7960 useless extension candidates. Maximal degree in co-relation 82570. Up to 7360 conditions per place. [2024-06-27 20:30:43,834 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 646 selfloop transitions, 145 changer transitions 0/845 dead transitions. [2024-06-27 20:30:43,834 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 512 places, 845 transitions, 14281 flow [2024-06-27 20:30:43,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:30:43,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:30:43,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-27 20:30:43,835 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43154761904761907 [2024-06-27 20:30:43,835 INFO L175 Difference]: Start difference. First operand has 505 places, 812 transitions, 11864 flow. Second operand 8 states and 145 transitions. [2024-06-27 20:30:43,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 512 places, 845 transitions, 14281 flow [2024-06-27 20:30:48,498 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 507 places, 845 transitions, 14132 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-27 20:30:48,508 INFO L231 Difference]: Finished difference. Result has 508 places, 822 transitions, 12265 flow [2024-06-27 20:30:48,508 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11719, PETRI_DIFFERENCE_MINUEND_PLACES=500, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=812, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=677, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12265, PETRI_PLACES=508, PETRI_TRANSITIONS=822} [2024-06-27 20:30:48,509 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 465 predicate places. [2024-06-27 20:30:48,509 INFO L495 AbstractCegarLoop]: Abstraction has has 508 places, 822 transitions, 12265 flow [2024-06-27 20:30:48,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 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) [2024-06-27 20:30:48,509 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:30:48,509 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:30:48,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-27 20:30:48,509 INFO L420 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:30:48,509 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:30:48,509 INFO L85 PathProgramCache]: Analyzing trace with hash -170619159, now seen corresponding path program 14 times [2024-06-27 20:30:48,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:30:48,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266514926] [2024-06-27 20:30:48,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:30:48,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:30:48,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:30:49,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:30:49,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:30:49,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266514926] [2024-06-27 20:30:49,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266514926] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:30:49,547 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:30:49,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:30:49,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919245411] [2024-06-27 20:30:49,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:30:49,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:30:49,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:30:49,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:30:49,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:30:49,635 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:30:49,635 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 508 places, 822 transitions, 12265 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 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) [2024-06-27 20:30:49,635 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:30:49,635 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:30:49,635 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:30:52,225 INFO L124 PetriNetUnfolderBase]: 5197/7974 cut-off events. [2024-06-27 20:30:52,226 INFO L125 PetriNetUnfolderBase]: For 1754040/1754046 co-relation queries the response was YES. [2024-06-27 20:30:52,335 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83302 conditions, 7974 events. 5197/7974 cut-off events. For 1754040/1754046 co-relation queries the response was YES. Maximal size of possible extension queue 455. Compared 46804 event pairs, 1373 based on Foata normal form. 7/7980 useless extension candidates. Maximal degree in co-relation 83089. Up to 7408 conditions per place. [2024-06-27 20:30:52,372 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 602 selfloop transitions, 189 changer transitions 0/845 dead transitions. [2024-06-27 20:30:52,372 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 515 places, 845 transitions, 14510 flow [2024-06-27 20:30:52,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:30:52,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:30:52,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-27 20:30:52,373 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4226190476190476 [2024-06-27 20:30:52,373 INFO L175 Difference]: Start difference. First operand has 508 places, 822 transitions, 12265 flow. Second operand 8 states and 142 transitions. [2024-06-27 20:30:52,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 515 places, 845 transitions, 14510 flow [2024-06-27 20:30:57,845 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 510 places, 845 transitions, 14267 flow, removed 50 selfloop flow, removed 5 redundant places. [2024-06-27 20:30:57,855 INFO L231 Difference]: Finished difference. Result has 511 places, 828 transitions, 12547 flow [2024-06-27 20:30:57,856 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12026, PETRI_DIFFERENCE_MINUEND_PLACES=503, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=822, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=183, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=639, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12547, PETRI_PLACES=511, PETRI_TRANSITIONS=828} [2024-06-27 20:30:57,856 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 468 predicate places. [2024-06-27 20:30:57,856 INFO L495 AbstractCegarLoop]: Abstraction has has 511 places, 828 transitions, 12547 flow [2024-06-27 20:30:57,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 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) [2024-06-27 20:30:57,856 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:30:57,856 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:30:57,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-27 20:30:57,856 INFO L420 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:30:57,857 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:30:57,857 INFO L85 PathProgramCache]: Analyzing trace with hash -170741795, now seen corresponding path program 11 times [2024-06-27 20:30:57,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:30:57,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194180574] [2024-06-27 20:30:57,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:30:57,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:30:57,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:30:59,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:30:59,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:30:59,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194180574] [2024-06-27 20:30:59,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194180574] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:30:59,094 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:30:59,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:30:59,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123221062] [2024-06-27 20:30:59,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:30:59,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:30:59,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:30:59,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:30:59,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:30:59,213 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:30:59,213 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 511 places, 828 transitions, 12547 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 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) [2024-06-27 20:30:59,213 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:30:59,213 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:30:59,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:31:01,954 INFO L124 PetriNetUnfolderBase]: 5301/8091 cut-off events. [2024-06-27 20:31:01,954 INFO L125 PetriNetUnfolderBase]: For 1757368/1757372 co-relation queries the response was YES. [2024-06-27 20:31:02,066 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84040 conditions, 8091 events. 5301/8091 cut-off events. For 1757368/1757372 co-relation queries the response was YES. Maximal size of possible extension queue 462. Compared 47183 event pairs, 1430 based on Foata normal form. 5/8095 useless extension candidates. Maximal degree in co-relation 83827. Up to 7875 conditions per place. [2024-06-27 20:31:02,108 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 745 selfloop transitions, 103 changer transitions 0/851 dead transitions. [2024-06-27 20:31:02,108 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 519 places, 851 transitions, 14659 flow [2024-06-27 20:31:02,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:31:02,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:31:02,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-27 20:31:02,109 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2024-06-27 20:31:02,109 INFO L175 Difference]: Start difference. First operand has 511 places, 828 transitions, 12547 flow. Second operand 9 states and 147 transitions. [2024-06-27 20:31:02,109 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 519 places, 851 transitions, 14659 flow [2024-06-27 20:31:07,112 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 514 places, 851 transitions, 14412 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-27 20:31:07,121 INFO L231 Difference]: Finished difference. Result has 515 places, 834 transitions, 12642 flow [2024-06-27 20:31:07,122 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12302, PETRI_DIFFERENCE_MINUEND_PLACES=506, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=828, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=728, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12642, PETRI_PLACES=515, PETRI_TRANSITIONS=834} [2024-06-27 20:31:07,122 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 472 predicate places. [2024-06-27 20:31:07,122 INFO L495 AbstractCegarLoop]: Abstraction has has 515 places, 834 transitions, 12642 flow [2024-06-27 20:31:07,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 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) [2024-06-27 20:31:07,122 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:31:07,122 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:31:07,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-27 20:31:07,122 INFO L420 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:31:07,122 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:31:07,122 INFO L85 PathProgramCache]: Analyzing trace with hash -170731565, now seen corresponding path program 12 times [2024-06-27 20:31:07,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:31:07,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881264866] [2024-06-27 20:31:07,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:31:07,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:31:07,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:31:08,372 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:31:08,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:31:08,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881264866] [2024-06-27 20:31:08,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881264866] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:31:08,372 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:31:08,372 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:31:08,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018637557] [2024-06-27 20:31:08,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:31:08,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:31:08,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:31:08,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:31:08,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:31:08,482 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:31:08,482 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 515 places, 834 transitions, 12642 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 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) [2024-06-27 20:31:08,482 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:31:08,482 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:31:08,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:31:11,075 INFO L124 PetriNetUnfolderBase]: 5311/8105 cut-off events. [2024-06-27 20:31:11,076 INFO L125 PetriNetUnfolderBase]: For 1758091/1758095 co-relation queries the response was YES. [2024-06-27 20:31:11,180 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83986 conditions, 8105 events. 5311/8105 cut-off events. For 1758091/1758095 co-relation queries the response was YES. Maximal size of possible extension queue 464. Compared 47259 event pairs, 1430 based on Foata normal form. 5/8109 useless extension candidates. Maximal degree in co-relation 83773. Up to 7904 conditions per place. [2024-06-27 20:31:11,216 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 760 selfloop transitions, 93 changer transitions 0/856 dead transitions. [2024-06-27 20:31:11,216 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 523 places, 856 transitions, 14529 flow [2024-06-27 20:31:11,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:31:11,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:31:11,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 145 transitions. [2024-06-27 20:31:11,216 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3835978835978836 [2024-06-27 20:31:11,217 INFO L175 Difference]: Start difference. First operand has 515 places, 834 transitions, 12642 flow. Second operand 9 states and 145 transitions. [2024-06-27 20:31:11,217 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 523 places, 856 transitions, 14529 flow [2024-06-27 20:31:16,022 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 519 places, 856 transitions, 14425 flow, removed 28 selfloop flow, removed 4 redundant places. [2024-06-27 20:31:16,031 INFO L231 Difference]: Finished difference. Result has 520 places, 840 transitions, 12857 flow [2024-06-27 20:31:16,031 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12546, PETRI_DIFFERENCE_MINUEND_PLACES=511, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=834, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=744, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12857, PETRI_PLACES=520, PETRI_TRANSITIONS=840} [2024-06-27 20:31:16,031 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 477 predicate places. [2024-06-27 20:31:16,032 INFO L495 AbstractCegarLoop]: Abstraction has has 520 places, 840 transitions, 12857 flow [2024-06-27 20:31:16,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 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) [2024-06-27 20:31:16,032 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:31:16,032 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:31:16,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-27 20:31:16,032 INFO L420 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:31:16,032 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:31:16,032 INFO L85 PathProgramCache]: Analyzing trace with hash 116164221, now seen corresponding path program 11 times [2024-06-27 20:31:16,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:31:16,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655786993] [2024-06-27 20:31:16,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:31:16,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:31:16,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:31:17,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:31:17,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:31:17,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655786993] [2024-06-27 20:31:17,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655786993] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:31:17,345 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:31:17,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:31:17,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866199647] [2024-06-27 20:31:17,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:31:17,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:31:17,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:31:17,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:31:17,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:31:17,527 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:31:17,527 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 520 places, 840 transitions, 12857 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:31:17,527 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:31:17,527 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:31:17,527 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:31:20,202 INFO L124 PetriNetUnfolderBase]: 5227/8025 cut-off events. [2024-06-27 20:31:20,202 INFO L125 PetriNetUnfolderBase]: For 1770073/1770077 co-relation queries the response was YES. [2024-06-27 20:31:20,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83808 conditions, 8025 events. 5227/8025 cut-off events. For 1770073/1770077 co-relation queries the response was YES. Maximal size of possible extension queue 465. Compared 47261 event pairs, 1377 based on Foata normal form. 6/8030 useless extension candidates. Maximal degree in co-relation 83594. Up to 7659 conditions per place. [2024-06-27 20:31:20,352 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 738 selfloop transitions, 63 changer transitions 0/859 dead transitions. [2024-06-27 20:31:20,353 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 528 places, 859 transitions, 14571 flow [2024-06-27 20:31:20,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:31:20,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:31:20,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-06-27 20:31:20,354 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3941798941798942 [2024-06-27 20:31:20,354 INFO L175 Difference]: Start difference. First operand has 520 places, 840 transitions, 12857 flow. Second operand 9 states and 149 transitions. [2024-06-27 20:31:20,354 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 528 places, 859 transitions, 14571 flow